EP3529004B1 - Quick clamping device for at least one rotationally drivable drive shaft having a portable machine tool, in particular an angle grinding machine - Google Patents

Quick clamping device for at least one rotationally drivable drive shaft having a portable machine tool, in particular an angle grinding machine Download PDF

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Publication number
EP3529004B1
EP3529004B1 EP17780078.6A EP17780078A EP3529004B1 EP 3529004 B1 EP3529004 B1 EP 3529004B1 EP 17780078 A EP17780078 A EP 17780078A EP 3529004 B1 EP3529004 B1 EP 3529004B1
Authority
EP
European Patent Office
Prior art keywords
operator control
unit
operating
movement
clamping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17780078.6A
Other languages
German (de)
French (fr)
Other versions
EP3529004A1 (en
Inventor
Bruno Luescher
Andreas Zurbruegg
David Winistoerfer
Alexander Wuensche
Marcus Schuller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3529004A1 publication Critical patent/EP3529004A1/en
Application granted granted Critical
Publication of EP3529004B1 publication Critical patent/EP3529004B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00Means for securing grinding wheels on rotary arbors
    • B24B45/006Quick mount and release means for disc-like wheels, e.g. on power tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/022Spindle-locking devices, e.g. for mounting or removing the tool
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028Angle tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00Means for securing grinding wheels on rotary arbors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29Details; Component parts; Accessories
    • B27B5/30Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32Devices for securing circular saw blades to the saw spindle

Definitions

  • the EP 1 182 019 A1 discloses a quick release device according to the preamble of claim 1.
  • the invention is based on a quick-action clamping device for a portable machine tool, in particular an angle grinder, which has at least one rotationally drivable output shaft, with at least one clamping unit which, for tool-free fixing of an application tool unit on the output shaft, has at least one movably mounted clamping element for applying a clamping force to the application tool unit in a clamping position of the clamping element has, and with at least one operating unit at least for a movement of the clamping element in a release position of the clamping element, the at least one movably mounted operating element, in particular a movably mounted operating lever.
  • the operating element has at least one operating surface for moving the tensioning element into the release position, which is arranged in such a way that at least one force application point of the operating element interacts with a contact surface of a movably mounted operating element of the operating unit depending on a movement of the operating element is movable on the contact surface.
  • the actuating surface of the operating element and the contact surface of the actuating element interact, there is preferably a line contact between the actuating surface of the operating element and the contact surface of the actuating element.
  • the at least one force application point of the operating element is preferably arranged on a contact line of the actuating surface of the operating element.
  • Line contact preferably takes place between the actuating surface of the operating element and the contact surface of the actuating element along the contact line of the actuating surface of the operating element.
  • the at least one force application point of the operating element is formed by a contact point of the operating surface of the operating element, which is intended to bear against the contact surface of the operating element when the operating surface of the operating element and the contact surface of the operating element interact. “Provided” should be understood to mean, in particular, specially programmed, designed and/or equipped.
  • an element and/or a unit is provided for a specific function is to be understood in particular to mean that the element and/or the unit fulfills/fulfils and/or executes this specific function in at least one application and/or operating state.
  • executes "Movably mounted” is to be understood in particular as a mounting of an element and/or a unit, with the element and/or the unit being able to move, in particular decoupled from an elastic deformation of the element and/or the unit, along a movement axis of more than 5 mm, preferably more than 10 mm and more preferably more than 50 mm and/or about an axis of movement along an angular range of more than 1°, preferably more than 5° and more preferably more than 15°.
  • the at least one force application point can be moved in a manner that is already known to a person skilled in the art depending on a movement of the operating element and an interaction of the actuating surface with the contact surface on the actuating surface.
  • the at least one force application point is preferably designed differently from a fixed point of the actuating surface of the operating element.
  • a position of the at least one force application point on the actuating surface can preferably be changed in a manner already known to a person skilled in the art depending on a movement position of the operating element and on interaction of the actuating surface with the contact surface.
  • the actuating surface of the operating element in particular the at least one force application point, preferably slides along the contact surface of the actuating element when the actuating surface of the operating element and the contact surface of the actuating element interact.
  • the actuating surface of the operating element is preferably arranged on an eccentric section of the operating element.
  • the actuating surface of the operating element is preferably designed as a curved outer surface of the operating element.
  • the operating element preferably has an arc-shaped outer contour in the eccentric section, in particular in a plane running at least essentially perpendicularly to a movement axis of the operating element.
  • the operating element preferably has a maximum longitudinal extent which is in particular less than 50 mm, preferably less than 40 mm and particularly preferably less than 30 mm.
  • the maximum longitudinal extent of the operating element preferably runs along a direction running at least essentially perpendicularly to a movement axis of the operating element.
  • the quick-action clamping device preferably comprises at least one decoupling unit, which is provided for decoupling the operating unit from the clamping unit as a function of a rotational speed of the output shaft.
  • the decoupling unit is preferably provided to activate the operating unit depending on a speed of the output shaft, which is in particular greater than 100 rpm, preferably greater than 500 rpm, particularly preferably greater than 1000 rpm and very particularly preferably greater than 5000 rpm, to be decoupled from the tensioning unit.
  • the decoupling unit is provided to couple the operating unit to the tensioning unit, in particular to enable this a movement of the clamping element by means of an action of an operator force via the operating unit.
  • the decoupling unit is preferably provided for preventing, interrupting and/or converting a transmission of an actuating force from the operating unit to the tensioning unit into a movement of a decoupling element as a function of a rotational speed of the output shaft.
  • the decoupling unit is provided for preventing and/or interrupting a power transmission connection between the operating unit and the tensioning unit as a function of a rotational speed of the output shaft.
  • the decoupling unit is preferably designed as a mechanical decoupling unit.
  • the decoupling unit is preferably provided to decouple the operating unit from the clamping unit as a function of a speed of the output shaft as a result of a relative movement between at least one element of the operating unit and at least one element of the clamping unit and/or the decoupling unit.
  • the decoupling unit can have a coupling element, a centrifugal force element, a friction element or another element considered appropriate by a person skilled in the art, by means of which the operating unit can be decoupled from the tensioning unit as a function of a speed of the output shaft.
  • the decoupling unit it is also conceivable for the decoupling unit to be in the form of an electrical and/or electronic decoupling unit.
  • a speed of the output shaft can be electronically detected, for example by means of at least one sensor element of the decoupling unit or by means of an electronic evaluation of drive unit parameters, with an actuator of the decoupling unit creating a lock the decoupling unit can be actuated, which activates or deactivates actuation of the operating unit depending on a speed of the output shaft, and/or a clutch of the decoupling unit depending on a speed of the output shaft by means of an actuator of the decoupling unit can be actuated, which opens or closes a power transmission connection between the operating unit and the tensioning unit.
  • the decoupling unit is preferably arranged at least partially on and/or in the output shaft.
  • the decoupling unit can preferably be used to prevent a movement of the tensioning element as a result of an actuation of an operating element of the operating unit depending on a rotational speed of the output shaft.
  • the quick-action clamping device preferably comprises at least one safety unit, in particular a self-locking unit and/or a latching unit, which is provided for the purpose of causing a movement of the clamping element starting from the Clamping position in the release position of the clamping element, in particular to prevent tolerance and / or play-related movements of the clamping element.
  • the safety unit in particular the self-locking unit and/or the latching unit, is preferably provided for the purpose of preventing the clamping element, starting from the clamping position, from moving into the to secure the release position of the clamping element.
  • the expression "to be secured as far as possible against movement” is intended to be understood in particular as securing an element, in particular in one position of the element, against movement, with a tolerance- and/or play-related movement of the element being able to take place in a secured position of the element .
  • a form-fitting connection between the clamping element and the insert tool unit is preferably secured, in particular in order to prevent the insert tool unit from being unintentionally released from the clamping unit.
  • the application tool unit can preferably be removed from the tensioning unit and/or the output shaft.
  • the clamping element can preferably be secured by the securing unit in the clamping position by means of a form-fitting and/or non-positive connection in the clamping position against movement into the release position of the clamping element.
  • the fuse unit at least provided to prevent a pivoting movement of the clamping element starting from the clamping position of the clamping element at least as far as possible, in particular except for a tolerance- and/or play-related pivoting movement, against a pivoting movement of the clamping element into the release position.
  • the security unit can be designed as a magnetic security unit, as a mechanical security unit, as an electronic security unit or the like.
  • the security unit comprises at least one magnetic element, which secures the tensioning element in the tensioned position by means of the action of a magnetic force.
  • the safety unit comprises at least one mechanical safety element, which secures the tensioning element in the tensioned position by means of a positive and/or non-positive connection.
  • the security unit comprises at least one electronic element that secures the tensioning element in the tensioned position and/or that monitors a position of the tensioning element and, when the tensioned position is reached, controls an actuator that controls the tensioning element secured in the clamping position.
  • the security unit comprises at least one electronic element that secures the tensioning element in the tensioned position and/or that monitors a position of the tensioning element and, when the tensioned position is reached, controls an actuator that controls the tensioning element secured in the clamping position.
  • Other configurations of the security unit that appear sensible to a person skilled in the art are also conceivable.
  • the clamping element can preferably be moved into the clamping position and/or into the release position by means of a mechanical connection between the at least one operating element of the operating unit and the clamping element by means of the operating unit.
  • the operating element is preferably designed as an operating lever, in particular as a pivoted operating lever.
  • an operating element of the operating unit it is also conceivable for an operating element of the operating unit to be able to generate an electrical signal which can be used to control an actuator which is intended to move the clamping element into the clamping position and/or into the release position.
  • the operating unit can be embodied as a mechanical, electrical and/or electronic operating unit, which is provided to move the clamping element into the clamping position and/or into the release position as a result of an operating command from an operator and/or an operator's power.
  • the clamping unit preferably comprises at least two movably, in particular pivotably, mounted clamping elements.
  • the clamping unit comprises a different number of clamping elements from two.
  • the at least two tensioning elements preferably have an at least essentially analogous configuration.
  • the at least two tensioning elements of the tensioning unit are preferably mounted such that they can be moved relative to one another, in particular pivoted relative to one another.
  • the at least two clamping elements can be moved into a clamping position of the clamping elements and/or into a release position of the clamping elements by means of the operating unit.
  • the at least two clamping elements can preferably be moved together by means of the operating unit, in particular can be moved together into the clamping position and/or into the release position.
  • the at least two clamping elements can be moved into the clamping position and/or into the release position independently of one another by means of the operating unit.
  • the tensioning element is preferably arranged at least partially in the output shaft.
  • the output shaft surrounds the tensioning element at least partially, in particular completely, along a circumferential direction that runs around an axis of rotation of the output shaft.
  • the tensioning element is preferably connected to the output shaft in a rotationally fixed manner.
  • the tensioning element is preferably mounted pivotably about a pivot axis of the tensioning element.
  • the pivot axis of the tensioning element preferably runs transversely, in particular at least essentially perpendicularly, to the axis of rotation of the output shaft.
  • the pivot axis of the tensioning element preferably runs at least essentially perpendicularly to a tensioning axis of the tensioning unit.
  • a “clamping axis” is to be understood here in particular as an axis of the clamping unit, along which an axial securing force of the clamping unit can be exerted on the insert tool unit to fix the insert tool unit on the output shaft and/or along which a transmission element of the clamping unit can be moved to move the clamping element is stored.
  • “At least essentially perpendicular” is intended to define in particular an alignment of a direction relative to a reference direction, with the direction and the reference direction, viewed in particular in one plane, enclosing an angle of 90° and the angle has a maximum deviation of, in particular, less than 8° , advantageously less than 5° and particularly advantageously less than 2°.
  • the clamping element is preferably designed as a clamping jaw.
  • the tensioning element is preferably provided for the purpose of holding the application tool unit axially on the output shaft to secure. At least in the clamping position, the clamping element preferably engages at least partially in the tool insert unit, in particular in a fixing recess of the tool insert unit. The clamping element preferably engages behind a clamping extension of the tool insert unit, at least when the tool insert unit is in a state where it is fixed by means of the clamping unit.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever.
  • the operating element has a movement axis, in particular a pivot axis, which is offset relative to a movement axis of the actuating element, in particular skewed.
  • the axis of movement of the operating element preferably runs, viewed in a projection plane into which the axis of movement of the operating element and the axis of movement of the actuating element are projected, at least essentially perpendicular to the axis of movement of the actuating element.
  • the axis of movement of the actuating element preferably runs at least essentially parallel, in particular coaxially, to the clamping axis of the clamping unit and/or to the axis of rotation of the output shaft.
  • the actuating element is preferably mounted in a translationally movable manner along the movement axis of the actuating element.
  • the actuating element is preferably designed as an actuating bolt.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever. It can be structurally simple movement of at least one force application point on the contact surface of the actuating element at a Cooperation of the actuating surface of the operating element and the contact surface of the actuating element can be realized.
  • the operating element has a movement axis, in particular a pivot axis, with a straight line running through the movement axis of the operating element and the force application point with the contact surface of the operating element depending on an operating position of the operating element in an at least essentially perpendicular to the movement axis of the operating element enclose an angle from an angular range of 35° to 85°.
  • the straight line running through the movement axis and the force application point encloses an angle of less than 50° with the contact surface of the operating element in an operating position of the operating element, in which the operating element is moved from a rest position of the operating element into a contact position of the operating element and is greater than 35°, in particular an angle with a value of 40°.
  • the actuating surface is preferably in contact with the contact surface, with the actuating element being stationary along the movement axis of the actuating element.
  • the straight line running through the movement axis and the force application point encloses a smaller angle with the contact surface of the operating element in an operating position of the operating element, in which the operating element is moved from the rest position or starting from the contact position into an end position of the operating element than 90° and greater than 70°, in particular an angle with a value of 80°.
  • the operating surface is preferably in contact with the contact surface, with the operating element being moved along the movement axis of the operating element to a maximum extent by means of the operating element.
  • the operating element preferably has a maximum movement angle of 90° from the rest position to the end position.
  • the operating element covers the maximum idle stroke angle, preferably during a movement starting from the rest position into the contact position.
  • the control element In the rest position, the control element preferably rests with a stop area on a gear housing of the portable machine tool.
  • the stop area of the operating element is preferably arranged on a side of the operating element that faces away from the eccentric section.
  • the force application point can be moved along a straight line on the contact surface as a result of a movement of the operating element.
  • the force application point can preferably be moved along a straight line on the contact surface as a result of a movement of the operating element, starting from the contact position of the operating element into the end position of the operating element.
  • the actuating element is preferably moved translationally along the movement axis of the actuating element as a result of a movement of the operating element starting from the contact position of the operating element to the end position of the operating element, in particular to a movement of the clamping element starting from the clamping position of the clamping element to the release position of the clamping element.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever.
  • the force application point can be moved at least essentially over a maximum extent of the contact surface along a straight line on the contact surface as a result of a movement of the operating element.
  • the force application point is preferably movable as a result of a movement of the operating element, starting from the contact position of the operating element into the end position of the operating element, at least essentially over a maximum extent of the contact surface along a straight line on the contact surface.
  • the force application point can preferably be moved as a result of a movement of the operating element from one edge of the contact surface to another edge of the contact surface, which is remote from the edge of the contact surface.
  • the force application point can preferably be moved within an end face of the actuating element.
  • the end face of the actuating element which faces the operating element, preferably forms the contact surface of the actuating element.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever.
  • an advantageous power transmission can be realized between the operating element and the actuating element.
  • the operating element is pivotably mounted and has a minimum idle stroke angle of more than 5°.
  • the operating element preferably has a maximum idle stroke angle of less than 20°, in particular 18°.
  • An "idle stroke angle" is to be understood in particular as an angle that the operating element sweeps over during a movement starting from the rest position into the contact position.
  • the operating element can preferably be moved without contact with the actuating element during a movement starting from the rest position into the contact position.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever.
  • a comfortable movement of the control element, starting from the rest position into the contact position, can be made possible, which can be achieved with the action of a small operator force.
  • the operating element has at least one stop surface, which limits a maximum movement, in particular a maximum lifting angle, of the operating element and is arranged adjacent to the actuating surface on the operating element.
  • the stop surface is preferably provided to limit a maximum movement of the operating element by means of an interaction with a stop element of the operating unit arranged on the gear housing of the portable power tool.
  • the operating surface of the operating element preferably forms at least partially the stop surface of the operating element.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a maximum movement of the operating element can be limited in a structurally simple manner.
  • the control element has a movement axis, in particular a pivot axis, and at least two control surfaces which are arranged on opposite sides of the control element along a direction running at least substantially perpendicularly to the movement axis of the control element.
  • at least one of the at least two control surfaces is intended to cause the control element to move from the rest position to the contact position, in particular as a result of an operator exerting a compressive force on the at least one of the at least two control surfaces.
  • At least one of the at least two control surfaces is preferably provided to cause the control element to move from the contact position to the end position, in particular as a result of an operator exerting a tensile force on the at least one of the at least two control surfaces.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-action clamping device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element. It can be an advantageous one comfortable actuation of the control element designed as a control lever can be realized.
  • a portable machine tool in particular an angle grinder, is proposed with a quick-action clamping device according to the invention.
  • a "portable machine tool” is to be understood here in particular as a machine tool for machining workpieces, which can be transported by an operator without a transport machine.
  • the portable machine tool has a mass that is less than 40 kg, preferably less than 10 kg and particularly preferably less than 5 kg.
  • the portable machine tool is particularly preferably designed as an angle grinder.
  • the portable power tool it is also conceivable for the portable power tool to have a different design that would appear sensible to a person skilled in the art, such as a design as a circular saw machine, a grinding machine or the like.
  • the portable power tool preferably includes a driven shaft that can be driven in rotation.
  • the quick-action clamping device is preferably arranged on the output shaft.
  • the quick-action clamping device is preferably arranged at least partially in the output shaft.
  • the output shaft is preferably designed as a hollow shaft.
  • the portable machine tool forms a machine tool system together with an insert tool unit that can be fixed to the output shaft by means of the quick-action clamping device.
  • a high level of operating convenience can advantageously be achieved by means of the configuration of the portable machine tool according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever.
  • the portable machine tool comprises at least one gear housing on which the operating element is movably mounted and is arranged in the vicinity of at least one ventilation opening of the gear housing, the operating element being at least essentially free of ventilation openings on the gear housing in an unactuated state is arranged.
  • the operating element is preferably arranged on the transmission housing without covering the ventilation openings, at least in the rest position of the operating element.
  • a “near area” is to be understood in particular as an area that has a maximum distance relative to an element and/or a unit that is in particular less than 100 mm, preferably less than 50 mm and particularly preferably less than 20 mm .
  • a high level of operating convenience can advantageously be achieved by means of the configuration of the portable machine tool according to the invention.
  • a compact arrangement of the operating unit on the portable machine tool can advantageously be implemented.
  • FIG 1 shows a portable machine tool 14 designed as an angle grinder with a quick-action clamping device 10. It is also conceivable, however, for the portable machine tool 14 to have another configuration that would appear sensible to a person skilled in the art, such as a configuration as a circular saw machine, a grinder or the like.
  • the portable Machine tool 14 includes a gear housing 54 for a recording and / or Storage of a gear unit 58 of the portable machine tool 14.
  • the gear housing 54 is preferably made of a metallic material. However, it is also conceivable for the gear housing 54 to be made of another material that a person skilled in the art considers appropriate, such as plastic or the like.
  • the gear unit 58 is preferably designed as an angular gear.
  • the transmission unit 58 includes in particular a rotationally drivable output shaft 12 to which an insert tool unit 18 can be fixed, in particular by means of the quick-action clamping device 10.
  • the output shaft 12 is preferably designed as a hollow spindle in which the quick-action clamping device 10 is at least partially arranged ( figure 2 ).
  • a protective hood unit can be arranged on the transmission housing 54 in a manner already known to a person skilled in the art.
  • An additional handle can be arranged on the transmission housing 54 in a manner already known to a person skilled in the art.
  • Portable machine tool 14 includes a motor housing 60 for accommodating and/or supporting a drive unit 62 of portable machine tool 14.
  • Drive unit 62 is preferably provided in a manner already known to a person skilled in the art to drive the output shaft by means of interaction with transmission unit 58 12 rotating about an axis of rotation 64 of the output shaft 12 to drive.
  • the axis of rotation 64 of the output shaft 12 runs at least substantially perpendicular to a drive axis 66 of the drive unit 62.
  • the drive unit 62 is preferably designed as an electric motor unit. However, it is also conceivable for the drive unit 62 to have a different design that would appear sensible to a person skilled in the art, such as a design as a combustion drive unit, as a hybrid drive unit, as a pneumatic drive unit or the like.
  • FIG 2 shows a sectional view of the portable machine tool 14, in particular in the area of the gear housing 54, and the quick-action clamping device 10.
  • the quick-action clamping device 10 for the portable machine tool 14, which has at least the rotationally drivable output shaft 12, comprises at least one clamping unit 16, which is used to fix the insertion tool unit 18 in place without tools of the output shaft 12 has at least one movably mounted clamping element 20, 22 to exert a clamping force on the insertion tool unit 18 in a clamping position of the clamping element 20, 22.
  • the quick-action clamping device 10 has at least one operating unit 24, at least for moving the clamping element 20, 22 into a release position of the clamping element 20, 22, which has at least one movably mounted operating element 26, in particular a movably mounted operating lever.
  • the clamping unit 16 comprises at least two movably mounted clamping elements 20, 22.
  • the clamping unit 16 comprises a number of clamping elements 20, 22 that differs from two.
  • the at least two clamping elements 20, 22 have an at least essentially analogous configuration, so that features that are disclosed for one of the clamping elements 20, 22 are also to be regarded as disclosed for the other clamping element 20, 22.
  • the at least two clamping elements 20, 22 are pivotably mounted.
  • a pivot axis 68 of the clamping element 20, 22, in particular of the at least two clamping elements 20, 22, runs at least substantially perpendicularly to the axis of rotation 64 of the output shaft 12.
  • the at least two clamping elements 20, 22 are intended to fasten the insertion tool unit 18 in one on the clamping unit 16 and/or the output shaft 12 arranged state axially on the output shaft 12, in particular in the clamping position of the at least two clamping elements 20, 22.
  • the at least two clamping elements 20, 22 are rotatably connected to the output shaft 12.
  • the at least two tensioning elements 20, 22 can be driven together with the output shaft 12 to rotate about the axis of rotation 64.
  • the clamping unit 16 comprises at least one rotary driver element 70 for torque transmission to the tool insert unit 18.
  • the rotary driver element 70 engages in a receiving recess (not shown here) of the tool insert unit 18 and is in contact with at least one edge of the insertion tool unit 18 that delimits the receiving recess for torque transmission.
  • Torque is transmitted between the output shaft 12 and the tool insert unit 18 arranged on the clamping unit 16 and/or the output shaft 12, preferably in a manner already known to a person skilled in the art by means of a positive connection between the rotary driver element 70 and the tool insert unit 18.
  • the rotary driver element 70 is arranged in a rotationally fixed manner on the output shaft 12 .
  • the rotary driver element 70 can be driven together with the output shaft 12 to rotate about the axis of rotation 64 .
  • Operating unit 24 is preferably provided to move clamping element 20, 22, in particular the at least two clamping elements 20, 22, at least into the release position in which insert tool unit 18 can be removed from clamping unit 16 and/or output shaft 12.
  • the operating unit 24 is provided for moving the clamping element 20, 22, in particular the at least two clamping elements 20, 22, at least into the clamping position in which the insertion tool unit 18 can be clamped by means of the clamping unit 16 on the output shaft 12 is fixable.
  • the operating unit 24 preferably includes at least the operating element 26, which can be actuated by an operator.
  • the operating element 26 is designed as an operating lever.
  • the operating element 26 comprises a movement axis 36, in particular a pivot axis, which runs transversely, in particular at least essentially perpendicularly, to the axis of rotation 64 of the output shaft 12.
  • the control element 26 is preferably pivotably mounted about the axis of movement 36, in particular the pivot axis, of the control element 26.
  • the operating element 26 is decoupled from a rotary movement of the output shaft 12 .
  • Operating element 26 is movably mounted on transmission housing 54 and is arranged in the vicinity of at least one ventilation opening 56 in transmission housing 54, with operating element 26 being arranged on transmission housing 54 at least substantially without a ventilation opening covering it, at least in an unactuated state, in particular when operating element 26 is in a rest position .
  • the operating element 26 can be partially moved into a recess 76 in the transmission housing 54 .
  • dirt as a result of a movement of the operating element 26 about a movement axis 36 of the operating element 26 can be at least partially conveyed out of the recess 76 by means of an eccentric section 72 of the operating element 26 .
  • the operating element 26 has at least one brush element, which is arranged on the eccentric section 72 and is intended to sweep out the recess 76 as a result of a movement of the operating element 26 .
  • the at least one ventilation opening 56 is arranged on the gear housing 54 in such a way that a 56 exiting air flow to clean the recess 76 is usable.
  • the clamping element 20, 22, in particular the clamping elements 20, 22, is/are movably, in particular pivotably, mounted on the output shaft 12, in particular in the output shaft 12.
  • the pivot axis 68 of the clamping element 20, 22, in particular of the clamping elements 20, 22, preferably runs at least substantially perpendicularly to the clamping axis 78 of the clamping unit 16a.
  • the tensioning element 20 , 22 in particular the tensioning elements 20 , 22 , has/have at least one movement link element which is intended to interact with a link engagement element of the tensioning unit 16 .
  • the link engagement element is fixed to a transmission element 100 of the tensioning unit 16 .
  • the link engagement element is designed as a bolt that is fixed to the transmission element 100, in particular between two fork ends of the transmission element 100.
  • the clamping element 20, 22, in particular the clamping elements 20, 22, is/are movable from the release position into the clamping position, in particular by means of the action of a spring force of a clamping spring element 102 of the clamping unit 16 on the transmission element 100.
  • the clamping element 20, 22, in particular the clamping elements 20, 22, is/are automatically movable into the clamping position, in particular after the action of an operator force has been removed via the operating unit 24, as a result of the action of a spring force of the clamping spring element 102.
  • the quick-action clamping device 10 comprises at least one decoupling unit 86 which is provided for decoupling the operating unit 24 from the clamping unit 16 as a function of a rotational speed of the output shaft 12 .
  • Decoupling unit 86 is configured such that, depending on the rotational speed of output shaft 12, a relative movement takes place between at least one decoupling element 94 of decoupling unit 86 and at least actuating element 34 of operating unit 24 to decouple operating unit 24 from clamping unit 16.
  • the decoupling unit 86 includes at least that movably mounted decoupling element 94, which can be converted into a decoupling position depending on a rotational speed of the output shaft 12, in which the operating unit 24 is decoupled from the clamping unit 16.
  • the decoupling unit 86 is preferably designed as a friction decoupling unit.
  • the decoupling unit 86 has at least the movably mounted decoupling element 94 which can be moved relative to the output shaft 12 as a result of a frictional force between the decoupling element 94 and the actuating element 34 of the operating unit 24 .
  • the decoupling unit 86 has at least the movably mounted decoupling element 94 which is movably mounted in the output shaft 12 along and/or around the axis of rotation 64 of the output shaft 12 .
  • the decoupling unit 86 comprises at least the movably mounted decoupling element 94 and at least one decoupling spring element 96 which applies a spring force to the decoupling element 94 in the direction of the operating unit 24 .
  • the decoupling unit 86 has at least the movably mounted decoupling element 94 and at least one link element 98 for guiding the decoupling element 94 during a relative movement of the decoupling element 94 relative to the output
  • the decoupling element 94 can be brought into contact with the actuating element 34 by means of a non-positive connection, or the decoupling element 94 is in contact with the actuating element 34 by means of a non-positive connection.
  • the decoupling element 94 is preferably movably mounted in translation along the axis of rotation 64, in particular in the output shaft 12 or in the transmission element 100 of the tensioning unit 16.
  • the decoupling element 94 comprises in particular a conical connection region which at least partially engages in a recess of the actuating element 34. A frictional effect between the actuating element 34 and the decoupling element 94 is dependent in particular on the configuration of the conical connection region and a spring force of the decoupling spring element 96.
  • the decoupling spring element 96 is intended to apply a spring force to the decoupling element 94 in the direction of the actuating element 34.
  • the decoupling spring element 96 is arranged in the transmission element 100 of the clamping unit 16 .
  • the transmission element 100 is designed as a clamping fork.
  • the transmission element 100 is connected to the output shaft 12 in a torque-proof manner.
  • the transmission element 100 is along a clamping axis 78 of the clamping unit 16 can be moved in translation.
  • the transmission element 100 is movably mounted in the output shaft 12 .
  • the transmission element 100 can be subjected to a spring force at least by means of the tensioning spring element 102 of the tensioning unit 16 along the tensioning axis 78 , in particular in the direction of the operating unit 24 .
  • Decoupling unit 86 has at least one connecting element 104, which is provided to connect the decoupling element 94 and the transmission element 100 to one another in terms of movement, in particular at least when the output shaft 12 is in a state with a low rotational speed or when the output shaft 12 is stationary.
  • the connecting element 104 is designed as a bolt.
  • the connecting element 104 is arranged, in particular fixed, on the decoupling element 94 .
  • the connecting element 104 can be moved together with the decoupling element 94 .
  • the connecting element 104 extends into the link element 98 of the decoupling unit 86 ( figure 2 ).
  • the link element 98 is designed as a link guide track.
  • the gate element 98 is arranged on the transmission element 100, in particular formed in one piece with the transmission element 100.
  • the decoupling element 94 and the connecting element 104 can be rotated relative to the transmission element 100 as a result of braking by actuating the actuating element 34, with the connecting element 104 being movable in the link element 98 designed as a slotted guide track in such a way that the decoupling element 94 counteracts a Spring force of the decoupling spring element 96 can be moved into a guide recess 106 of the transmission element 100 .
  • An actuation of the operating element 26 during a rotational movement of the output shaft 12 can be converted into a movement of the actuating element 34 and the decoupling element 94 relative to the transmission element 100 .
  • a movement of the transmission element 100 as a result of the action of an operator force by means of the operating unit 24 to transfer the clamping element 20, 22, in particular the clamping elements 20, 22, starting from the clamping position into the release position during a rotary movement of the output shaft 12 can be prevented as far as possible.
  • the transmission element 100 can be moved by means of the operating unit 24 against a spring force of the tension spring element 102 .
  • the transmission element 100 is provided to move the clamping element 20, 22, in particular the clamping elements 20, 22, starting from the clamping position into the release position.
  • Operating element 26 includes eccentric section 72 for actuating operating element 34 of operating unit 24.
  • Actuating element 34 is mounted so that it can move in a translatory manner along axis of rotation 64, in particular in output shaft 12 and/or in transmission housing 54.
  • Actuating element 34 is secured against rotation relative to the Transmission housing 54 is fixed in the transmission housing 54, in particular as a result of at least one lateral flattening of the actuating element 34, which enables axial movement and prevents rotational movement.
  • the actuating element 34 preferably has at least one flattening on each of two opposite sides of the actuating element 34 .
  • a sealing element 74 such as a rubber seal or the like, is preferably arranged in the area of the actuating element 34, in order to prevent dirt from penetrating into the transmission housing 54 and/or into the tensioning unit 16 at least as far as possible.
  • the sealing element 74 is preferably in contact with the actuating element 34 .
  • the actuating element 34 is in particular movably mounted relative to the sealing element 74 . When moving relative to sealing element 74, actuating element 34 slides on at least one sealing surface of sealing element 74.
  • the operating element 26 has at least one actuating surface 28, which is arranged such that at least one force application point 30 of the operating element 26 when interacting with a contact surface 32 movably mounted actuating element 34 of the operating unit 24 can be moved on the contact surface 32 as a function of a movement of the operating element 26 (cf. Figures 3 and 4 ).
  • the actuating surface 28 of the operating element 26 is preferably arranged on the eccentric section 72 of the operating element 26 .
  • actuating surface 28 of operating element 26 and contact surface 32 of actuating element 34 interact, there is linear contact between actuating surface 28 of operating element 26 and contact surface 32 of actuating element 34.
  • the at least one force application point 30 of operating element 26 is preferably on a contact line of the actuating surface 28 of the operating element 26 is arranged.
  • actuating surface 28 of the operating element 26 and the contact surface 32 of the actuating element 34 interact, there is linear contact between the actuating surface 28 of the operating element 26 and the contact surface 32 of the actuating element 34 along the contact line of the actuating surface 28 of the operating element 26.
  • a punctiform contact takes place, the punctiform contact taking place at the at least one force application point 30 of the operating element 26.
  • the at least one force application point 30 of the operating element 26 is formed by a point of contact of the operating surface 28 of the operating element 26, which is intended to bear against the contact surface 32 of the operating element 34 when the operating surface 28 of the operating element 26 and the contact surface 32 of the operating element 34 interact ( Figures 3 and 4 ).
  • the operating element 26 has the movement axis 36, in particular a pivot axis, which is offset relative to a movement axis 38 of the actuating element 34, in particular skewed.
  • the axis of movement 38 of the actuating element 34 preferably runs at least essentially parallel, in particular coaxially, to a clamping axis 78 of the clamping unit 16 and/or to the axis of rotation 64 of the output shaft 12.
  • the clamping axis 78 preferably runs at least essentially parallel, in particular coaxially, to the axis of rotation 64 of the Output shaft 12.
  • the operating element 26 has the movement axis 36, with a straight line 40 running through the movement axis 36 of the operating element 26 and the force application point 30 having the contact surface 32 of the operating element 34 depending on an operating position and/or movement position of operating element 26 in a plane running at least essentially perpendicularly to movement axis 36 of operating element 26 enclose an angle 42 from an angle range of 35° to 85° (cf. Figures 3 and 4 ).
  • the straight line 40 running through the movement axis 36 of the operating element 26 and the force application point 30 preferably closes in an actuation position and/or movement position of the operating element 26, in which the operating element 26 is in a rest position of the operating element 26 ( figure 2 ) into a contact position of the operating element 26 ( figure 3 ) is moved, forms an angle 42 with the contact surface 32 of the actuating element 34 which is smaller than 50° and larger than 35°, in particular an angle 42 with a value of 40° ( figure 3 ).
  • the operating surface 28 is preferably in contact with the contact surface 32 , with the operating element 34 not being moved by the operating element 26 along the movement axis 38 of the operating element 34 .
  • the straight line 40 running through the movement axis 36 of the operating element 26 and the force application point 30 preferably closes in an actuation position and/or movement position of the operating element 26, in which the operating element 26 is in the rest position ( figures 2 and 5 ) or starting from the contact position ( figure 3 ) is moved into an end position of the operating element 26 ( figure 4 ), with the contact surface 32 of the actuating element 34 an angle 42 which is smaller than 90 ° and larger than 70 °, in particular an angle 42 with a value of 80 °.
  • the operating surface 28 is preferably in contact with the contact surface 32 , with the operating element 34 being moved along the movement axis 38 of the operating element 34 at most by means of the operating element 26 .
  • the force application point 30 is movable as a result of a movement of the operating element 26 along a straight line on the contact surface 32, in particular when the operating element 26 moves from the contact position of the operating element 26 into the end position of the operating element 26.
  • the force application point 30 is as a result of a movement of the operating element 26 movable at least essentially over a maximum extension 44 of the contact surface 32 along a straight line on the contact surface 32, in particular when the operating element 26 moves starting from the contact position of the operating element 26 into the end position of the operating element 26.
  • the operating element 26 is pivotably mounted and has a minimum idle stroke angle 46 of more than 5°.
  • the operating element 26 preferably has a maximum idle stroke angle 46 of less than 20°, in particular 18°.
  • the maximum idle stroke angle 46 is an angle through which the operating element 26 rotates when the operating element 26 pivots from the rest position ( figures 2 and 5 ) to the contact position ( figure 3 ) is movable.
  • the operating element 26 has at least one stop surface 48 which limits a maximum movement, in particular a maximum lifting angle, of the operating element 26 and is arranged adjacent to the actuating surface 28 on the operating element 26 .
  • the stop surface 48 is preferably provided to bear against the transmission housing 54 in the end position of the operating element 26 in order to limit a maximum movement, in particular a maximum stroke angle, of the operating element 26 .
  • Operating element 26 has movement axis 36, in particular a pivot axis, and at least two operating surfaces 50, 52, which are arranged on opposite sides of operating element 26 along a direction running at least substantially perpendicularly to movement axis 36 of operating element 26.
  • One of the at least two control surfaces 50, 52 is to an action of an operator force to a movement of the control element 26 starting from the rest position ( figures 2 and 5 ) to the contact position ( figure 3 ) provided, in particular as a result of the action of a pressure force from an operator on one of the at least two control surfaces 50, 52.
  • One of the at least two control surfaces 50, 52 is subject to the action of an operator force to move the control element 26 starting from the contact position ( figure 3 ) to the final position ( figure 4 ) provided, in particular as a result of an operator exerting a tensile force on one of the at least two operating surfaces 50, 52.
  • the operating unit 24 includes at least one spring element 80, which the operating element 26 with a spring force in the direction of the rest position ( figures 2 and 5 ) of the operating element 26 is applied ( Figures 5 and 6 ).
  • the spring element 80 is preferably designed as a torsion spring, in particular as a torsion spring. One end of the spring element 80 is supported on the operating element 26 and another end of the spring element 80 is supported on the transmission housing 54 ( figure 6 ).
  • the spring element 80 is provided to close the operating element 26 with a spring force about the movement axis 36 of the operating element 26 pressurize
  • the spring element 80 is preferably arranged in an area of a bearing recess 82 of the operating element 26 .
  • the spring element 80 is intended to prefix the eccentric section 72 of the operating element 26 to a base body 84 of the operating element 26 when the operating element 26 is installed.
  • the spring element is provided to return the operating element 26 to the rest position and/or to hold the operating element 26 in the rest position.
  • the base body 84 is preferably formed from a plastic or from an elastomer.
  • the eccentric section 72 is preferably formed from a metallic material.
  • the operating surfaces 50, 52 are arranged on the base body 84.
  • the base body 84 is in the rest position ( figures 2 and 5 ) to the transmission housing 54. Damping against vibrations of the operating element 26 can advantageously be made possible during operation of the portable machine tool 14 .
  • figure 7 shows a force diagram of a control element force of the control element 26 compared to a spring force of the tension spring element 102 during a movement of the control element 26 about the movement axis 36 of the control element 26.
  • the force diagram is designed as a force-displacement (angle) diagram in which a force over a way is applied.
  • An upper graph 88 of the force diagram shows a course of a control element force of the control element 26 during a movement from the rest position ( figures 2 and 5 ) to the final position ( figure 4 ).
  • a middle graph 90 shows a course of a control element force of the control element 26 during a movement from the end position ( figure 4 ) to the rest position ( figures 2 and 5 ).
  • a lower graph 92 shows a spring force profile of tension spring element 102 as a function of the movement of operating element 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Gripping On Spindles (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Manipulator (AREA)

Description

Stand der TechnikState of the art

Aus DE 100 17 458 A1 ist bereits eine Schnellspannvorrichtung für eine zumindest eine rotierend antreibbare Abtriebswelle aufweisende tragbare Werkzeugmaschine, insbesondere Winkelschleifmaschine, mit zumindest einer Spanneinheit, die zu einer werkzeuglosen Fixierung einer Einsatzwerkzeugeinheit an der Abtriebswelle zumindest ein beweglich gelagertes Spannelement zu einer Spannkrafteinwirkung auf die Einsatzwerkzeugeinheit in einer Spannposition des Spannelements aufweist, und mit zumindest einer Bedieneinheit zumindest zu einer Bewegung des Spannelements in eine Löseposition des Spannelements, die zumindest ein beweglich gelagertes Bedienelement aufweist, bekannt.Out of DE 100 17 458 A1 is already a quick-action clamping device for a portable machine tool, in particular an angle grinder, which has at least one rotationally drivable output shaft, with at least one clamping unit which has at least one movably mounted clamping element for a clamping force effect on the insert tool unit in a clamping position of the clamping element for tool-free fixing of an insert tool unit on the output shaft , And with at least one operating unit at least for moving the clamping element into a release position of the clamping element, which has at least one movably mounted operating element.

Die EP 1 182 019 A1 offenbart eine Schnellspannvorrichtung gemäß dem Oberbegriff von Anspruch 1.The EP 1 182 019 A1 discloses a quick release device according to the preamble of claim 1.

Offenbarung der ErfindungDisclosure of Invention

Die Erfindung wird im unabhängigen Anspruch 1 definiert. Bevorzugte Ausführungsformen sind in den abhängigen Ansprüchen definiert.The invention is defined in independent claim 1. Preferred embodiments are defined in the dependent claims.

Die Erfindung geht aus von einer Schnellspannvorrichtung für eine zumindest eine rotierend antreibbare Abtriebswelle aufweisende tragbare Werkzeugmaschine, insbesondere Winkelschleifmaschine, mit zumindest einer Spanneinheit, die zu einer werkzeuglosen Fixierung einer Einsatzwerkzeugeinheit an der Abtriebswelle zumindest ein beweglich gelagertes Spannelement zu einer Spannkrafteinwirkung auf die Einsatzwerkzeugeinheit in einer Spannposition des Spannelements aufweist, und mit zumindest einer Bedieneinheit zumindest zu einer Bewegung des Spannelements in eine Löseposition des Spannelements, die zumindest ein beweglich gelagertes Bedienelement, insbesondere einen beweglich gelagerten Bedienhebel, aufweist.The invention is based on a quick-action clamping device for a portable machine tool, in particular an angle grinder, which has at least one rotationally drivable output shaft, with at least one clamping unit which, for tool-free fixing of an application tool unit on the output shaft, has at least one movably mounted clamping element for applying a clamping force to the application tool unit in a clamping position of the clamping element has, and with at least one operating unit at least for a movement of the clamping element in a release position of the clamping element, the at least one movably mounted operating element, in particular a movably mounted operating lever.

Es wird vorgeschlagen, dass das Bedienelement zu einer Bewegung des Spannelements in die Löseposition zumindest eine Betätigungsfläche aufweist, die derart angeordnet ist, dass zumindest ein Krafteinleitungspunkt des Bedienelements bei einem Zusammenwirken mit einer Kontaktfläche eines beweglich gelagerten Betätigungselements der Bedieneinheit in Abhängigkeit von einer Bewegung des Bedienelements auf der Kontaktfläche bewegbar ist. Vorzugsweise erfolgt bei einem Zusammenwirken der Betätigungsfläche des Bedienelements und der Kontaktfläche des Betätigungselements ein Linienkontakt zwischen der Betätigungsfläche des Bedienelements und der Kontaktfläche des Betätigungselements. Der zumindest eine Krafteinleitungspunkt des Bedienelements ist vorzugsweise auf einer Kontaktlinie der Betätigungsfläche des Bedienelements angeordnet. Bevorzugt erfolgt ein Linienkontakt zwischen der Betätigungsfläche des Bedienelements und der Kontaktfläche des Betätigungselements entlang der Kontaktlinie der Betätigungsfläche des Bedienelements. Es ist jedoch auch denkbar, dass bei einem Zusammenwirken der Betätigungsfläche des Bedienelements und der Kontaktfläche des Betätigungselements ein punktförmiger Kontakt erfolgt, wobei der punktförmige Kontakt an dem zumindest einen Krafteinleitungspunkt des Bedienelements erfolgt. Vorzugsweise wird der zumindest eine Krafteinleitungspunkt des Bedienelements von einem Berührungspunkt der Betätigungsfläche des Bedienelements gebildet, der dazu vorgesehen ist, bei einem Zusammenwirken der Betätigungsfläche des Bedienelements und der Kontaktfläche des Betätigungselements an der Kontaktfläche des Betätigungselements anzuliegen. Unter "vorgesehen" soll insbesondere speziell programmiert, ausgelegt und/oder ausgestattet verstanden werden. Darunter, dass ein Element und/oder eine Einheit zu einer bestimmten Funktion vorgesehen ist, soll insbesondere verstanden werden, dass das Element und/oder die Einheit diese bestimmte Funktion in zumindest einem Anwendungs- und/oder Betriebszustand erfüllen/erfüllt und/oder ausführen/ausführt. Unter "beweglich gelagert" soll insbesondere eine Lagerung eines Elements und/oder einer Einheit verstanden werden, wobei das Element und/oder die Einheit eine Bewegungsmöglichkeit, insbesondere entkoppelt von einer elastischen Verformung des Elements und/oder der Einheit, entlang einer Bewegungsachse von mehr als 5 mm, bevorzugt von mehr als 10 mm und besonders bevorzugt von mehr als 50 mm und/oder um eine Bewegungsachse entlang eines Winkelbereichs von mehr als 1°, bevorzugt von mehr als 5° und besonders bevorzugt von mehr als 15° aufweisen/aufweist.It is proposed that the operating element has at least one operating surface for moving the tensioning element into the release position, which is arranged in such a way that at least one force application point of the operating element interacts with a contact surface of a movably mounted operating element of the operating unit depending on a movement of the operating element is movable on the contact surface. When the actuating surface of the operating element and the contact surface of the actuating element interact, there is preferably a line contact between the actuating surface of the operating element and the contact surface of the actuating element. The at least one force application point of the operating element is preferably arranged on a contact line of the actuating surface of the operating element. Line contact preferably takes place between the actuating surface of the operating element and the contact surface of the actuating element along the contact line of the actuating surface of the operating element. However, it is also conceivable that when the actuating surface of the operating element and the contact surface of the actuating element interact, there is point contact, with the point contact occurring at the at least one force application point of the operating element. Preferably, the at least one force application point of the operating element is formed by a contact point of the operating surface of the operating element, which is intended to bear against the contact surface of the operating element when the operating surface of the operating element and the contact surface of the operating element interact. “Provided” should be understood to mean, in particular, specially programmed, designed and/or equipped. The fact that an element and/or a unit is provided for a specific function is to be understood in particular to mean that the element and/or the unit fulfills/fulfils and/or executes this specific function in at least one application and/or operating state. executes "Movably mounted" is to be understood in particular as a mounting of an element and/or a unit, with the element and/or the unit being able to move, in particular decoupled from an elastic deformation of the element and/or the unit, along a movement axis of more than 5 mm, preferably more than 10 mm and more preferably more than 50 mm and/or about an axis of movement along an angular range of more than 1°, preferably more than 5° and more preferably more than 15°.

Der zumindest eine Krafteinleitungspunkt ist in Abhängigkeit von einer Bewegung des Bedienelements und von einem Zusammenwirken der Betätigungsfläche mit der Kontaktfläche auf der Betätigungsfläche auf eine, einem Fachmann bereits bekannte Art und Weise bewegbar. Der zumindest eine Krafteinleitungspunkt ist bevorzugt verschieden von einem Fixpunkt der Betätigungsfläche des Bedienelements ausgebildet. Eine Position des zumindest einen Krafteinleitungspunkts auf der Betätigungsfläche ist vorzugsweise auf eine, einem Fachmann bereits bekannte Art und Weise in Abhängigkeit von einer Bewegungsposition des Bedienelements und von einem Zusammenwirken der Betätigungsfläche mit der Kontaktfläche veränderbar. Bevorzugt gleitet die Betätigungsfläche des Bedienelements, insbesondere der zumindest eine Krafteinleitungspunkt, bei einem Zusammenwirken der Betätigungsfläche des Bedienelements und der Kontaktfläche des Betätigungselements entlang der Kontaktfläche des Betätigungselements. Die Betätigungsfläche des Bedienelements ist bevorzugt an einem Exzenterabschnitt des Bedienelements angeordnet. Die Betätigungsfläche des Bedienelements ist vorzugsweise als gewölbte Außenfläche des Bedienelements ausgebildet. Das Bedienelement weist vorzugsweise im Exzenterabschnitt eine kreisbogenförmige Außenkontur auf, insbesondere in einer sich zumindest im Wesentlichen senkrecht zu einer Bewegungsachse des Bedienelements verlaufenden Ebene. Das Bedienelement weist vorzugsweise eine maximale Längserstreckung auf, die insbesondere geringer ist als 50 mm, bevorzugt geringer ist als 40 mm und besonders bevorzugt geringer ist als 30 mm. Die maximale Längserstreckung des Bedienelements verläuft bevorzugt entlang einer zumindest im Wesentlichen senkrecht zu einer Bewegungsachse des Bedienelements verlaufenden Richtung.The at least one force application point can be moved in a manner that is already known to a person skilled in the art depending on a movement of the operating element and an interaction of the actuating surface with the contact surface on the actuating surface. The at least one force application point is preferably designed differently from a fixed point of the actuating surface of the operating element. A position of the at least one force application point on the actuating surface can preferably be changed in a manner already known to a person skilled in the art depending on a movement position of the operating element and on interaction of the actuating surface with the contact surface. The actuating surface of the operating element, in particular the at least one force application point, preferably slides along the contact surface of the actuating element when the actuating surface of the operating element and the contact surface of the actuating element interact. The actuating surface of the operating element is preferably arranged on an eccentric section of the operating element. The actuating surface of the operating element is preferably designed as a curved outer surface of the operating element. The operating element preferably has an arc-shaped outer contour in the eccentric section, in particular in a plane running at least essentially perpendicularly to a movement axis of the operating element. The operating element preferably has a maximum longitudinal extent which is in particular less than 50 mm, preferably less than 40 mm and particularly preferably less than 30 mm. The maximum longitudinal extent of the operating element preferably runs along a direction running at least essentially perpendicularly to a movement axis of the operating element.

Vorzugsweise umfasst die Schnellspannvorrichtung zumindest eine Entkopplungseinheit, die dazu vorgesehen ist, die Bedieneinheit in Abhängigkeit von einer Drehzahl der Abtriebswelle von der Spanneinheit zu entkoppeln. Vorzugsweise ist die Entkopplungseinheit dazu vorgesehen, die Bedieneinheit in Abhängigkeit von einer Drehzahl der Abtriebswelle, die insbesondere größer ist als 100 U/min, bevorzugt größer ist als 500 U/min, besonders bevorzugt größer ist als 1000 U/min und ganz besonders bevorzugt größer ist als 5000 U/min, von der Spanneinheit zu entkoppeln. Bei einer Drehzahl der Abtriebswelle von insbesondere weniger als 1000 U/min, bevorzugt von weniger als 500 U/min und besonders bevorzugt von weniger als 100 U/min ist die Entkopplungseinheit dazu vorgesehen, die Bedieneinheit mit der Spanneinheit zu koppeln, insbesondere zu einer Ermöglichung einer Bewegung des Spannelements mittels einer Einwirkung einer Bedienerkraft über die Bedieneinheit. Bevorzugt ist die Entkopplungseinheit dazu vorgesehen, eine Übertragung einer Betätigungskraft von der Bedieneinheit auf die Spanneinheit in Abhängigkeit von einer Drehzahl der Abtriebswelle zu unterbinden, zu unterbrechen und/oder in eine Bewegung eines Entkopplungselements umzuwandeln. insbesondere ist die Entkopplungseinheit dazu vorgesehen, eine Kraftübertragungsverbindung zwischen der Bedieneinheit und der Spanneinheit in Abhängigkeit von einer Drehzahl der Abtriebswelle zu unterbinden und/oder zu unterbrechen. Vorzugsweise ist die Entkopplungseinheit als mechanische Entkopplungseinheit ausgebildet. Die Entkopplungseinheit ist vorzugsweise dazu vorgesehen, infolge einer Relativbewegung zwischen zumindest einem Element der Bedieneinheit und zumindest einem Element der Spanneinheit und/oder der Entkopplungseinheit die Bedieneinheit in Abhängigkeit von einer Drehzahl der Abtriebswelle von der Spanneinheit zu entkoppeln. Die Entkopplungseinheit kann ein Kupplungselement, ein Fliehkraftelement, ein Reibungselement oder ein anderes, einem Fachmann als sinnvoll erscheinendes Element aufweisen, mittels dessen die Bedieneinheit in Abhängigkeit von einer Drehzahl der Abtriebswelle von der Spanneinheit entkoppelbar ist. Es ist jedoch auch denkbar, dass die Entkopplungseinheit als elektrische und/oder als elektronische Entkopplungseinheit ausgebildet ist. Beispielsweise ist bei einer Ausgestaltung der Entkopplungseinheit als elektrische und/oder als elektronische Entkopplungseinheit denkbar, dass eine Drehzahl der Abtriebswelle elektronisch erfassbar ist, wie beispielsweise mittels zumindest eines Sensorelements der Entkopplungseinheit oder mittels einer elektronischen Auswertung von Antriebseinheitskenngrößen, wobei mittels eines Aktors der Entkopplungseinheit eine Sperre der Entkopplungseinheit betätigbar ist, die eine Betätigung der Bedieneinheit in Abhängigkeit von einer Drehzahl der Abtriebswelle aktiviert oder deaktiviert, und/oder wobei mittels eines Aktors der Entkopplungseinheit eine Kupplung der Entkopplungseinheit in Abhängigkeit von einer Drehzahl der Abtriebswelle betätigbar ist, die eine Kraftübertragungsverbindung zwischen der Bedieneinheit und der Spanneinheit öffnet oder schließt. Weitere, einem Fachmann als sinnvoll erscheinende Ausgestaltungen der Entkopplungseinheit sind ebenfalls denkbar. Bevorzugt ist die Entkopplungseinheit zumindest teilweise an und/oder in der Abtriebswelle angeordnet. Mittels der Entkopplungseinheit ist vorzugsweise eine Bewegung des Spannelements infolge einer Betätigung eines Bedienelements der Bedieneinheit in Abhängigkeit von einer Drehzahl der Abtriebswelle unterbindbar.The quick-action clamping device preferably comprises at least one decoupling unit, which is provided for decoupling the operating unit from the clamping unit as a function of a rotational speed of the output shaft. The decoupling unit is preferably provided to activate the operating unit depending on a speed of the output shaft, which is in particular greater than 100 rpm, preferably greater than 500 rpm, particularly preferably greater than 1000 rpm and very particularly preferably greater than 5000 rpm, to be decoupled from the tensioning unit. At a speed of the output shaft of in particular less than 1000 rpm, preferably less than 500 rpm and particularly preferably less than 100 rpm, the decoupling unit is provided to couple the operating unit to the tensioning unit, in particular to enable this a movement of the clamping element by means of an action of an operator force via the operating unit. The decoupling unit is preferably provided for preventing, interrupting and/or converting a transmission of an actuating force from the operating unit to the tensioning unit into a movement of a decoupling element as a function of a rotational speed of the output shaft. In particular, the decoupling unit is provided for preventing and/or interrupting a power transmission connection between the operating unit and the tensioning unit as a function of a rotational speed of the output shaft. The decoupling unit is preferably designed as a mechanical decoupling unit. The decoupling unit is preferably provided to decouple the operating unit from the clamping unit as a function of a speed of the output shaft as a result of a relative movement between at least one element of the operating unit and at least one element of the clamping unit and/or the decoupling unit. The decoupling unit can have a coupling element, a centrifugal force element, a friction element or another element considered appropriate by a person skilled in the art, by means of which the operating unit can be decoupled from the tensioning unit as a function of a speed of the output shaft. However, it is also conceivable for the decoupling unit to be in the form of an electrical and/or electronic decoupling unit. For example, in one configuration of the decoupling unit as an electrical and/or electronic decoupling unit, it is conceivable that a speed of the output shaft can be electronically detected, for example by means of at least one sensor element of the decoupling unit or by means of an electronic evaluation of drive unit parameters, with an actuator of the decoupling unit creating a lock the decoupling unit can be actuated, which activates or deactivates actuation of the operating unit depending on a speed of the output shaft, and/or a clutch of the decoupling unit depending on a speed of the output shaft by means of an actuator of the decoupling unit can be actuated, which opens or closes a power transmission connection between the operating unit and the tensioning unit. Other configurations of the decoupling unit that appear sensible to a person skilled in the art are also conceivable. The decoupling unit is preferably arranged at least partially on and/or in the output shaft. The decoupling unit can preferably be used to prevent a movement of the tensioning element as a result of an actuation of an operating element of the operating unit depending on a rotational speed of the output shaft.

Vorzugsweise umfasst die Schnellspannvorrichtung zumindest eine Sicherungseinheit, insbesondere eine Selbsthemmungseinheit und/oder eine Rasteinheit, die dazu vorgesehen ist, zumindest bei einer Einwirkung einer von der Bedieneinheit entkoppelten und in Richtung der Löseposition des Spannelements wirkenden Kraft auf das Spannelement eine Bewegung des Spannelements ausgehend von der Spannposition in die Löseposition des Spannelements, insbesondere bis auf toleranz- und/oder spielbedingte Bewegungen des Spannelements, zu unterbinden. Bevorzugt ist die Sicherungseinheit, insbesondere die Selbsthemmungseinheit und/oder die Rasteinheit, dazu vorgesehen, zumindest bei einer Einwirkung einer von der Bedieneinheit entkoppelten und in Richtung der Löseposition des Spannelements wirkenden Kraft auf das Spannelement das Spannelement ausgehend von der Spannposition weitestgehend gegen eine Bewegung in die Löseposition des Spannelements zu sichern. Unter dem Ausdruck "weitestgehend gegen eine Bewegung zu sichern" soll insbesondere eine Sicherung eines Elements, insbesondere in einer Position des Elements, gegen eine Bewegung verstanden werden, wobei eine toleranz- und/oder spielbedingte Bewegung des Elements in einer gesicherten Position des Elements erfolgen kann. Vorzugsweise ist in der gesicherten Position des Spannelements eine formschlüssige Verbindung zwischen dem Spannelement und der Einsatzwerkzeugeinheit gesichert, insbesondere um ein unbeabsichtigtes Lösen der Einsatzwerkzeugeinheit von der Spanneinheit zu vermeiden. In der Löseposition des Spannelements ist die Einsatzwerkzeugeinheit vorzugsweise von der Spanneinheit und/oder der Abtriebswelle abnehmbar. Vorzugsweise ist das Spannelement durch die Sicherungseinheit in der Spannposition mittels einer form- und/oder kraftschlüssigen Verbindung in der Spannposition gegen eine Bewegung in die Löseposition des Spannelements sicherbar. Vorzugsweise ist die Sicherungseinheit zumindest dazu vorgesehen, eine Schwenkbewegung des Spannelements ausgehend von der Spannposition des Spannelements zumindest weitestgehend, insbesondere bis auf eine toleranz- und/oder spielbedingte Schwenkbewegung, gegen eine Schwenkbewegung des Spannelements in die Löseposition zu unterbinden. Die Sicherungseinheit kann als magnetische Sicherungseinheit, als mechanische Sicherungseinheit, als elektronische Sicherungseinheit o. dgl. ausgebildet sein. Bei einer Ausgestaltung der Sicherungseinheit als magnetische Sicherungseinheit ist es denkbar, dass die Sicherungseinheit zumindest ein Magnetelement umfasst, das das Spannelement mittels einer Einwirkung einer Magnetkraft in der Spannposition sichert. Bei einer Ausgestaltung der Sicherungseinheit als mechanische Sicherungseinheit ist es denkbar, dass die Sicherungseinheit zumindest ein mechanisches Sicherungselement umfasst, das das Spannelement mittels einer form- und/oder kraftschlüssigen Verbindung in der Spannposition sichert. Bei einer Ausgestaltung der Sicherungseinheit als elektronische Sicherungseinheit ist es denkbar, dass die Sicherungseinheit zumindest ein elektronisches Element umfasst, das das Spannelement in der Spannposition sichert und/oder das eine Position des Spannelements überwacht und bei einem Erreichen der Spannposition einen Aktor ansteuert, der das Spannelement in der Spannposition sichert. Weitere, einem Fachmann als sinnvoll erscheinende Ausgestaltungen der Sicherungseinheit sind ebenfalls denkbar.The quick-action clamping device preferably comprises at least one safety unit, in particular a self-locking unit and/or a latching unit, which is provided for the purpose of causing a movement of the clamping element starting from the Clamping position in the release position of the clamping element, in particular to prevent tolerance and / or play-related movements of the clamping element. The safety unit, in particular the self-locking unit and/or the latching unit, is preferably provided for the purpose of preventing the clamping element, starting from the clamping position, from moving into the to secure the release position of the clamping element. The expression "to be secured as far as possible against movement" is intended to be understood in particular as securing an element, in particular in one position of the element, against movement, with a tolerance- and/or play-related movement of the element being able to take place in a secured position of the element . In the secured position of the clamping element, a form-fitting connection between the clamping element and the insert tool unit is preferably secured, in particular in order to prevent the insert tool unit from being unintentionally released from the clamping unit. In the release position of the tensioning element, the application tool unit can preferably be removed from the tensioning unit and/or the output shaft. The clamping element can preferably be secured by the securing unit in the clamping position by means of a form-fitting and/or non-positive connection in the clamping position against movement into the release position of the clamping element. Preferably, the fuse unit at least provided to prevent a pivoting movement of the clamping element starting from the clamping position of the clamping element at least as far as possible, in particular except for a tolerance- and/or play-related pivoting movement, against a pivoting movement of the clamping element into the release position. The security unit can be designed as a magnetic security unit, as a mechanical security unit, as an electronic security unit or the like. In an embodiment of the security unit as a magnetic security unit, it is conceivable that the security unit comprises at least one magnetic element, which secures the tensioning element in the tensioned position by means of the action of a magnetic force. In an embodiment of the safety unit as a mechanical safety unit, it is conceivable that the safety unit comprises at least one mechanical safety element, which secures the tensioning element in the tensioned position by means of a positive and/or non-positive connection. In an embodiment of the security unit as an electronic security unit, it is conceivable that the security unit comprises at least one electronic element that secures the tensioning element in the tensioned position and/or that monitors a position of the tensioning element and, when the tensioned position is reached, controls an actuator that controls the tensioning element secured in the clamping position. Other configurations of the security unit that appear sensible to a person skilled in the art are also conceivable.

Bevorzugt ist das Spannelement mittels einer mechanischen Verbindung zwischen dem zumindest einen Bedienelement der Bedieneinheit und dem Spannelement mittels der Bedieneinheit in die Spannposition und/oder in die Löseposition bewegbar. Vorzugsweise ist das Bedienelement als Bedienhebel, insbesondere als schwenkbar gelagerter Bedienhebel, ausgebildet. Es ist jedoch auch denkbar, dass mittels eines Bedienelements der Bedieneinheit ein elektrisches Signal erzeugbar ist, mittels dessen ein Aktor ansteuerbar ist, der dazu vorgesehen ist, das Spannelement in die Spannposition und/oder in die Löseposition zu bewegen. Die Bedieneinheit kann als mechanische, als elektrische und/oder als elektronische Bedieneinheit ausgebildet sein, die dazu vorgesehen ist, infolge eines Bedienbefehls eines Bedieners und/oder einer Bedienerkraft eines Bedieners das Spannelement in die Spannposition und/oder in die Löseposition zu bewegen. Bevorzugt umfasst die Spanneinheit zumindest zwei beweglich, insbesondere schwenkbar, gelagerte Spannelemente. Es ist jedoch auch denkbar, dass die Spanneinheit eine von zwei abweichende Anzahl an Spannelementen umfasst. Bevorzugt weisen die zumindest zwei Spannelemente eine zumindest im Wesentlichen analoge Ausgestaltung auf. Vorzugsweise sind die zumindest zwei Spannelemente der Spanneinheit relativ zueinander beweglich, insbesondere relativ zueinander schwenkbar, gelagert. Insbesondere sind die zumindest zwei Spannelemente mittels der Bedieneinheit in eine Spannposition der Spannelemente und/oder in eine Löseposition der Spannelemente bewegbar. Bevorzugt sind die zumindest zwei Spannelemente mittels der Bedieneinheit gemeinsam bewegbar, insbesondere gemeinsam in die Spannposition und/oder in die Löseposition bewegbar. Es ist jedoch auch denkbar, dass die zumindest zwei Spannelemente mittels der Bedieneinheit unabhängig voneinander in die Spannposition und/oder in die Löseposition bewegbar sind.The clamping element can preferably be moved into the clamping position and/or into the release position by means of a mechanical connection between the at least one operating element of the operating unit and the clamping element by means of the operating unit. The operating element is preferably designed as an operating lever, in particular as a pivoted operating lever. However, it is also conceivable for an operating element of the operating unit to be able to generate an electrical signal which can be used to control an actuator which is intended to move the clamping element into the clamping position and/or into the release position. The operating unit can be embodied as a mechanical, electrical and/or electronic operating unit, which is provided to move the clamping element into the clamping position and/or into the release position as a result of an operating command from an operator and/or an operator's power. The clamping unit preferably comprises at least two movably, in particular pivotably, mounted clamping elements. However, it is also conceivable that the clamping unit comprises a different number of clamping elements from two. The at least two tensioning elements preferably have an at least essentially analogous configuration. The at least two tensioning elements of the tensioning unit are preferably mounted such that they can be moved relative to one another, in particular pivoted relative to one another. In particular, the at least two clamping elements can be moved into a clamping position of the clamping elements and/or into a release position of the clamping elements by means of the operating unit. The at least two clamping elements can preferably be moved together by means of the operating unit, in particular can be moved together into the clamping position and/or into the release position. However, it is also conceivable that the at least two clamping elements can be moved into the clamping position and/or into the release position independently of one another by means of the operating unit.

Vorzugsweise ist das Spannelement zumindest teilweise in der Abtriebswelle angeordnet. Bevorzugt umgibt die Abtriebswelle entlang einer Umfangsrichtung, die um eine Rotationsachse der Abtriebswelle verläuft, das Spannelement zumindest teilweise, insbesondere vollständig. Vorzugsweise ist das Spannelement drehfest mit der Abtriebswelle verbunden. Bevorzugt ist das Spannelement schwenkbar um eine Schwenkachse des Spannelements gelagert. Vorzugsweise verläuft die Schwenkachse des Spannelements quer, insbesondere zumindest im Wesentlichen senkrecht, zur Rotationsachse der Abtriebswelle. Bevorzugt verläuft die Schwenkachse des Spannelements zumindest im Wesentlichen senkrecht zu einer Spannachse der Spanneinheit. Unter einer "Spannachse" soll hier insbesondere eine Achse der Spanneinheit verstanden werden, entlang derer eine axiale Sicherungskraft der Spanneinheit auf die Einsatzwerkzeugeinheit zu einer Fixierung der Einsatzwerkzeugeinheit an der Abtriebswelle ausübbar ist und/oder entlang derer ein Übertragungselement der Spanneinheit zu einer Bewegung des Spannelements beweglich gelagert ist. Unter "zumindest im Wesentlichen senkrecht" soll insbesondere eine Ausrichtung einer Richtung relativ zu einer Bezugsrichtung definieren, wobei die Richtung und die Bezugsrichtung, insbesondere in einer Ebene betrachtet, einen Winkel von 90° einschließen und der Winkel eine maximale Abweichung von insbesondere kleiner als 8°, vorteilhaft kleiner als 5° und besonders vorteilhaft kleiner als 2° aufweist. Bevorzugt ist das Spannelement als Spannbacke ausgebildet. Vorzugsweise ist das Spannelement dazu vorgesehen, die Einsatzwerkzeugeinheit axial an der Abtriebswelle zu sichern. Bevorzugt greift das Spannelement zumindest in der Spannposition zumindest teilweise in die Einsatzwerkzeugeinheit ein, insbesondere in eine Fixierungsausnehmung der Einsatzwerkzeugeinheit. Bevorzugt hintergreift das Spannelement zumindest in einem mittels der Spanneinheit fixierten Zustand der Einsatzwerkzeugeinheit einen Spannfortsatz der Einsatzwerkzeugeinheit. Mittels der erfindungsgemäßen Ausgestaltung der Schnellspannvorrichtung kann vorteilhaft ein hoher Bedienkomfort realisiert werden. Es kann vorteilhaft infolge einer Bewegung des zumindest einen Krafteinleitungspunkts auf der Kontaktfläche eine Änderung eines Hebelarms zu einer Bewegung des Betätigungselements in Abhängigkeit von einer Bewegung des Bedienelements erreicht werden. Es kann vorteilhaft eine geringe Betätigungskraft zu einer Betätigung des als Bedienhebel ausgebildeten Bedienelements realisiert werden.The tensioning element is preferably arranged at least partially in the output shaft. Preferably, the output shaft surrounds the tensioning element at least partially, in particular completely, along a circumferential direction that runs around an axis of rotation of the output shaft. The tensioning element is preferably connected to the output shaft in a rotationally fixed manner. The tensioning element is preferably mounted pivotably about a pivot axis of the tensioning element. The pivot axis of the tensioning element preferably runs transversely, in particular at least essentially perpendicularly, to the axis of rotation of the output shaft. The pivot axis of the tensioning element preferably runs at least essentially perpendicularly to a tensioning axis of the tensioning unit. A "clamping axis" is to be understood here in particular as an axis of the clamping unit, along which an axial securing force of the clamping unit can be exerted on the insert tool unit to fix the insert tool unit on the output shaft and/or along which a transmission element of the clamping unit can be moved to move the clamping element is stored. “At least essentially perpendicular” is intended to define in particular an alignment of a direction relative to a reference direction, with the direction and the reference direction, viewed in particular in one plane, enclosing an angle of 90° and the angle has a maximum deviation of, in particular, less than 8° , advantageously less than 5° and particularly advantageously less than 2°. The clamping element is preferably designed as a clamping jaw. The tensioning element is preferably provided for the purpose of holding the application tool unit axially on the output shaft to secure. At least in the clamping position, the clamping element preferably engages at least partially in the tool insert unit, in particular in a fixing recess of the tool insert unit. The clamping element preferably engages behind a clamping extension of the tool insert unit, at least when the tool insert unit is in a state where it is fixed by means of the clamping unit. A high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention. Advantageously, as a result of a movement of the at least one force application point on the contact surface, a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element. Advantageously, a low actuating force can be used to actuate the operating element designed as an operating lever.

Des Weiteren wird vorgeschlagen, dass das Bedienelement eine Bewegungsachse, insbesondere eine Schwenkachse, aufweist, die relativ zu einer Bewegungsachse des Betätigungselements versetzt, insbesondere windschief, angeordnet ist. Vorzugsweise verläuft die Bewegungsachse des Bedienelements in einer Projektionsebene betrachtet, in die die Bewegungsachse des Bedienelements und die Bewegungsachse des Betätigungselements projiziert sind, zumindest im Wesentlichen senkrecht zur Bewegungsachse des Betätigungselements. Die Bewegungsachse des Betätigungselements verläuft vorzugsweise zumindest im Wesentlichen parallel, insbesondere koaxial, zur Spannachse der Spanneinheit und/oder zur Rotationsachse der Abtriebswelle. Das Betätigungselement ist vorzugsweise entlang der Bewegungsachse des Betätigungselements translatorisch beweglich gelagert. Das Betätigungselement ist bevorzugt als Betätigungsbolzen ausgebildet. Mittels der erfindungsgemäßen Ausgestaltung der Schnellspannvorrichtung kann vorteilhaft ein hoher Bedienkomfort realisiert werden. Es kann vorteilhaft infolge einer Bewegung des zumindest einen Krafteinleitungspunkts auf der Kontaktfläche eine Änderung eines Hebelarms zu einer Bewegung des Betätigungselements in Abhängigkeit von einer Bewegung des Bedienelements erreicht werden. Es kann vorteilhaft eine geringe Betätigungskraft zu einer Betätigung des als Bedienhebel ausgebildeten Bedienelements realisiert werden. Es kann konstruktiv einfach eine Bewegung des zumindest einen Krafteinleitungspunkts auf der Kontaktfläche des Betätigungselements bei einem Zusammenwirken der Betätigungsfläche des Bedienelements und der Kontaktfläche des Betätigungselements realisiert werden.Furthermore, it is proposed that the operating element has a movement axis, in particular a pivot axis, which is offset relative to a movement axis of the actuating element, in particular skewed. The axis of movement of the operating element preferably runs, viewed in a projection plane into which the axis of movement of the operating element and the axis of movement of the actuating element are projected, at least essentially perpendicular to the axis of movement of the actuating element. The axis of movement of the actuating element preferably runs at least essentially parallel, in particular coaxially, to the clamping axis of the clamping unit and/or to the axis of rotation of the output shaft. The actuating element is preferably mounted in a translationally movable manner along the movement axis of the actuating element. The actuating element is preferably designed as an actuating bolt. A high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention. Advantageously, as a result of a movement of the at least one force application point on the contact surface, a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element. Advantageously, a low actuating force can be used to actuate the operating element designed as an operating lever. It can be structurally simple movement of at least one force application point on the contact surface of the actuating element at a Cooperation of the actuating surface of the operating element and the contact surface of the actuating element can be realized.

Ferner wird vorgeschlagen, dass das Bedienelement eine Bewegungsachse, insbesondere eine Schwenkachse, aufweist, wobei eine durch die Bewegungsachse des Bedienelements und den Krafteinleitungspunkt verlaufende Gerade mit der Kontaktfläche des Betätigungselements in Abhängigkeit von einer Betätigungsposition des Bedienelements in einer zumindest im Wesentlichen senkrecht zur Bewegungsachse des Bedienelements verlaufenden Ebene einen Winkel aus einem Winkelbereich von 35° bis 85° einschließen. Vorzugsweise schließt die durch die Bewegungsachse und den Krafteinleitungspunkt verlaufende Gerade in einer Betätigungsposition des Bedienelements, in der das Bedienelement ausgehend von einer Ruheposition des Bedienelements in eine Kontaktposition des Bedienelements bewegt ist, mit der Kontaktfläche des Betätigungselements einen Winkel ein, der kleiner ist als 50° und größer ist als 35°, insbesondere einen Winkel mit einem Wert von 40°. In der Kontaktposition des Bedienelements liegt vorzugsweise die Betätigungsfläche an der Kontaktfläche an, wobei das Betätigungselement entlang der Bewegungsachse des Betätigungselements unbewegt ist. Bevorzugt schließt die durch die Bewegungsachse und den Krafteinleitungspunkt verlaufende Gerade in einer Betätigungsposition des Bedienelements, in der das Bedienelement ausgehend von der Ruheposition oder ausgehend von der Kontaktposition in eine Endposition des Bedienelements bewegt ist, mit der Kontaktfläche des Betätigungselements einen Winkel ein, der kleiner ist als 90° und größer ist als 70°, insbesondere einen Winkel mit einem Wert von 80°. In der Endposition des Bedienelements liegt vorzugsweise die Betätigungsfläche an der Kontaktfläche an, wobei das Betätigungselement entlang der Bewegungsachse des Betätigungselements maximal mittels des Bedienelements bewegt ist. Das Bedienelement weist bevorzugt ausgehend von der Ruheposition in die Endposition einen maximalen Bewegungswinkel von 90° auf. Das Bedienelement überstreicht den maximalen Leerhubwinkel bevorzugt bei einer Bewegung ausgehend von der Ruheposition in die Kontaktposition. In der Ruheposition liegt das Bedienelement vorzugsweise mit einem Anschlagbereich an einem Getriebegehäuse der tragbaren Werkzeugmaschine an. Der Anschlagbereich des Bedienelements ist bevorzugt an einer Seite des Bedienelements angeordnet, die dem Exzenterabschnitt abgewandt ist. Mittels der erfindungsgemä-ßen Ausgestaltung der Schnellspannvorrichtung kann vorteilhaft ein hoher Bedienkomfort realisiert werden. Es kann vorteilhaft infolge einer Bewegung des zumindest einen Krafteinleitungspunkts auf der Kontaktfläche eine Änderung eines Hebelarms zu einer Bewegung des Betätigungselements in Abhängigkeit von einer Bewegung des Bedienelements erreicht werden. Es kann vorteilhaft eine geringe Betätigungskraft zu einer Betätigung des als Bedienhebel ausgebildeten Bedienelements realisiert werden. Es kann vorteilhaft eine kompakte Ausgestaltung der Bedieneinheit ermöglicht werden.Furthermore, it is proposed that the operating element has a movement axis, in particular a pivot axis, with a straight line running through the movement axis of the operating element and the force application point with the contact surface of the operating element depending on an operating position of the operating element in an at least essentially perpendicular to the movement axis of the operating element enclose an angle from an angular range of 35° to 85°. Preferably, the straight line running through the movement axis and the force application point encloses an angle of less than 50° with the contact surface of the operating element in an operating position of the operating element, in which the operating element is moved from a rest position of the operating element into a contact position of the operating element and is greater than 35°, in particular an angle with a value of 40°. In the contact position of the operating element, the actuating surface is preferably in contact with the contact surface, with the actuating element being stationary along the movement axis of the actuating element. Preferably, the straight line running through the movement axis and the force application point encloses a smaller angle with the contact surface of the operating element in an operating position of the operating element, in which the operating element is moved from the rest position or starting from the contact position into an end position of the operating element than 90° and greater than 70°, in particular an angle with a value of 80°. In the end position of the operating element, the operating surface is preferably in contact with the contact surface, with the operating element being moved along the movement axis of the operating element to a maximum extent by means of the operating element. The operating element preferably has a maximum movement angle of 90° from the rest position to the end position. The operating element covers the maximum idle stroke angle, preferably during a movement starting from the rest position into the contact position. In the rest position, the control element preferably rests with a stop area on a gear housing of the portable machine tool. The stop area of the operating element is preferably arranged on a side of the operating element that faces away from the eccentric section. By means of the inventive-Shen Configuration of the quick-release device can advantageously be realized a high level of ease of use. Advantageously, as a result of a movement of the at least one force application point on the contact surface, a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element. Advantageously, a low actuating force can be used to actuate the operating element designed as an operating lever. A compact configuration of the operating unit can advantageously be made possible.

Zudem wird vorgeschlagen, dass der Krafteinleitungspunkt infolge einer Bewegung des Bedienelements entlang einer Geraden auf der Kontaktfläche bewegbar ist. Bevorzugt ist der Krafteinleitungspunkt infolge einer Bewegung des Bedienelements ausgehend von der Kontaktposition des Bedienelements in die Endposition des Bedienelements entlang einer Geraden auf der Kontaktfläche bewegbar. Vorzugsweise wird das Betätigungselements infolge einer Bewegung des Bedienelements ausgehend von der Kontaktposition des Bedienelements in die Endposition des Bedienelements translatorisch entlang der Bewegungsachse des Betätigungselements bewegt, insbesondere zu einer Bewegung des Spannelements ausgehend von der Spannposition des Spannelements in die Löseposition des Spannelements. Mittels der erfindungsgemäßen Ausgestaltung der Schnellspannvorrichtung kann vorteilhaft ein hoher Bedienkomfort realisiert werden. Es kann vorteilhaft infolge einer Bewegung des zumindest einen Krafteinleitungspunkts auf der Kontaktfläche eine Änderung eines Hebelarms zu einer Bewegung des Betätigungselements in Abhängigkeit von einer Bewegung des Bedienelements erreicht werden. Es kann vorteilhaft eine geringe Betätigungskraft zu einer Betätigung des als Bedienhebel ausgebildeten Bedienelements realisiert werden.In addition, it is proposed that the force application point can be moved along a straight line on the contact surface as a result of a movement of the operating element. The force application point can preferably be moved along a straight line on the contact surface as a result of a movement of the operating element, starting from the contact position of the operating element into the end position of the operating element. The actuating element is preferably moved translationally along the movement axis of the actuating element as a result of a movement of the operating element starting from the contact position of the operating element to the end position of the operating element, in particular to a movement of the clamping element starting from the clamping position of the clamping element to the release position of the clamping element. A high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention. Advantageously, as a result of a movement of the at least one force application point on the contact surface, a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element. Advantageously, a low actuating force can be used to actuate the operating element designed as an operating lever.

Des Weiteren wird vorgeschlagen, dass der Krafteinleitungspunkt infolge einer Bewegung des Bedienelements zumindest im Wesentlichen über eine Maximalerstreckung der Kontaktfläche entlang einer Geraden auf der Kontaktfläche bewegbar ist. Bevorzugt ist der Krafteinleitungspunkt infolge einer Bewegung des Bedienelements ausgehend von der Kontaktposition des Bedienelements in die Endposition des Bedienelements zumindest im Wesentlichen über eine Maximalerstreckung der Kontaktfläche entlang einer Geraden auf der Kontaktfläche bewegbar. Bevorzugt ist der Krafteinleitungspunkt infolge einer Bewegung des Bedienelements von einem Rand der Kotaktfläche zu einem weiteren Rand der Kontaktfläche bewegbar, der dem Rand der Kontaktfläche abgewandt ist. Vorzugsweise ist der Krafteinleitungspunkt innerhalb einer Stirnfläche des Betätigungselements bewegbar. Die Stirnfläche des Betätigungselements, die dem Bedienelement zugewandt ist, bildet vorzugsweise die Kontaktfläche des Betätigungselements. Mittels der erfindungsgemäßen Ausgestaltung der Schnellspannvorrichtung kann vorteilhaft ein hoher Bedienkomfort realisiert werden. Es kann vorteilhaft infolge einer Bewegung des zumindest einen Krafteinleitungspunkts auf der Kontaktfläche eine Änderung eines Hebelarms zu einer Bewegung des Betätigungselements in Abhängigkeit von einer Bewegung des Bedienelements erreicht werden. Es kann vorteilhaft eine geringe Betätigungskraft zu einer Betätigung des als Bedienhebel ausgebildeten Bedienelements realisiert werden. Es kann vorteilhaft eine vorteilhafte Kraftübertragung zwischen dem Bedienelement und dem Betätigungselement realisiert werden.Furthermore, it is proposed that the force application point can be moved at least essentially over a maximum extent of the contact surface along a straight line on the contact surface as a result of a movement of the operating element. The force application point is preferably movable as a result of a movement of the operating element, starting from the contact position of the operating element into the end position of the operating element, at least essentially over a maximum extent of the contact surface along a straight line on the contact surface. The force application point can preferably be moved as a result of a movement of the operating element from one edge of the contact surface to another edge of the contact surface, which is remote from the edge of the contact surface. The force application point can preferably be moved within an end face of the actuating element. The end face of the actuating element, which faces the operating element, preferably forms the contact surface of the actuating element. A high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention. Advantageously, as a result of a movement of the at least one force application point on the contact surface, a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element. Advantageously, a low actuating force can be used to actuate the operating element designed as an operating lever. Advantageously, an advantageous power transmission can be realized between the operating element and the actuating element.

Ferner wird vorgeschlagen, dass das Bedienelement schwenkbar gelagert ist und einen minimalen Leerhubwinkel von mehr als 5° aufweist. Vorzugsweise weist das Bedienelement einen maximalen Leerhubwinkel von weniger als 20°, insbesondere von 18°, auf. Unter einem "Leerhubwinkel" soll insbesondere ein Winkel verstanden werden, den das Bedienelement bei einer Bewegung ausgehend von der Ruheposition in die Kontaktposition überstreicht. Bevorzugt ist das Bedienelement bei einer Bewegung ausgehend von der Ruheposition in die Kontaktposition berührungsfrei zum Betätigungselement bewegbar. Mittels der erfindungsgemäßen Ausgestaltung der Schnellspannvorrichtung kann vorteilhaft ein hoher Bedienkomfort realisiert werden. Es kann vorteilhaft infolge einer Bewegung des zumindest einen Krafteinleitungspunkts auf der Kontaktfläche eine Änderung eines Hebelarms zu einer Bewegung des Betätigungselements in Abhängigkeit von einer Bewegung des Bedienelements erreicht werden. Es kann vorteilhaft eine geringe Betätigungskraft zu einer Betätigung des als Bedienhebel ausgebildeten Bedienelements realisiert werden. Es kann vorteilhaft eine komfortable Bewegung des Bedienelements ausgehend von der Ruheposition in die Kontaktposition ermöglicht werden, die mit einer Einwirkung einer geringen Bedienerkraft erreichbar ist.Furthermore, it is proposed that the operating element is pivotably mounted and has a minimum idle stroke angle of more than 5°. The operating element preferably has a maximum idle stroke angle of less than 20°, in particular 18°. An "idle stroke angle" is to be understood in particular as an angle that the operating element sweeps over during a movement starting from the rest position into the contact position. The operating element can preferably be moved without contact with the actuating element during a movement starting from the rest position into the contact position. A high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention. Advantageously, as a result of a movement of the at least one force application point on the contact surface, a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element. Advantageously, a low actuating force can be used to actuate the operating element designed as an operating lever. Advantageously, a comfortable movement of the control element, starting from the rest position into the contact position, can be made possible, which can be achieved with the action of a small operator force.

Zudem wird vorgeschlagen, dass das Bedienelement zumindest eine Anschlagfläche aufweist, die eine maximale Bewegung, insbesondere einen maximalen Hubwinkel, des Bedienelements begrenzt und angrenzend an die Betätigungsfläche am Bedienelement angeordnet ist. Die Anschlagfläche ist vorzugsweise dazu vorgesehen, mittels eines Zusammenwirkens mit einem am Getriebegehäuse der tragbaren Werkzeugmaschinen angeordneten Anschlagelement der Bedieneinheit eine maximale Bewegung des Bedienelements zu begrenzen. Bevorzugt bildet die Betätigungsfläche des Bedienelements zumindest teilweise die Anschlagfläche des Bedienelements. Mittels der erfindungsgemäßen Ausgestaltung der Schnellspannvorrichtung kann vorteilhaft ein hoher Bedienkomfort realisiert werden. Es kann vorteilhaft infolge einer Bewegung des zumindest einen Krafteinleitungspunkts auf der Kontaktfläche eine Änderung eines Hebelarms zu einer Bewegung des Betätigungselements in Abhängigkeit von einer Bewegung des Bedienelements erreicht werden. Es kann konstruktiv einfach eine maximale Bewegung des Bedienelements begrenzt werden.In addition, it is proposed that the operating element has at least one stop surface, which limits a maximum movement, in particular a maximum lifting angle, of the operating element and is arranged adjacent to the actuating surface on the operating element. The stop surface is preferably provided to limit a maximum movement of the operating element by means of an interaction with a stop element of the operating unit arranged on the gear housing of the portable power tool. The operating surface of the operating element preferably forms at least partially the stop surface of the operating element. A high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention. Advantageously, as a result of a movement of the at least one force application point on the contact surface, a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element. A maximum movement of the operating element can be limited in a structurally simple manner.

Erfindungsgemäß weist das Bedienelement eine Bewegungsachse, insbesondere eine Schwenkachse, und zumindest zwei Bedienflächen auf, die entlang einer zumindest im Wesentlichen senkrecht zur Bewegungsachse des Bedienelements verlaufenden Richtung an sich abgewandten Seiten des Bedienelements angeordnet sind. Erfindungsgemäß ist zumindest eine der zumindest zwei Bedienflächen dazu vorgesehen, eine Bewegung des Bedienelements ausgehend von der Ruheposition in die Kontaktposition hervorzurufen, insbesondere infolge einer Einwirkung einer Druckkraft eines Bedieners auf die zumindest eine der zumindest zwei Bedienflächen. Bevorzugt ist zumindest eine der zumindest zwei Bedienflächen dazu vorgesehen, eine Bewegung des Bedienelements ausgehend von der Kontaktposition in die Endposition hervorzurufen, insbesondere infolge einer Einwirkung einer Zugkraft eines Bedieners auf die zumindest eine der zumindest zwei Bedienflächen. Mittels der erfindungsgemä-ßen Ausgestaltung der Schnellspannvorrichtung kann vorteilhaft ein hoher Bedienkomfort realisiert werden. Es kann vorteilhaft infolge einer Bewegung des zumindest einen Krafteinleitungspunkts auf der Kontaktfläche eine Änderung eines Hebelarms zu einer Bewegung des Betätigungselements in Abhängigkeit von einer Bewegung des Bedienelements erreicht werden. Es kann vorteilhaft eine komfortable Betätigung des als Bedienhebel ausgebildeten Bedienelements realisiert werden.According to the invention, the control element has a movement axis, in particular a pivot axis, and at least two control surfaces which are arranged on opposite sides of the control element along a direction running at least substantially perpendicularly to the movement axis of the control element. According to the invention, at least one of the at least two control surfaces is intended to cause the control element to move from the rest position to the contact position, in particular as a result of an operator exerting a compressive force on the at least one of the at least two control surfaces. At least one of the at least two control surfaces is preferably provided to cause the control element to move from the contact position to the end position, in particular as a result of an operator exerting a tensile force on the at least one of the at least two control surfaces. A high level of operating comfort can advantageously be achieved by means of the configuration of the quick-action clamping device according to the invention. Advantageously, as a result of a movement of the at least one force application point on the contact surface, a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element. It can be an advantageous one comfortable actuation of the control element designed as a control lever can be realized.

Ferner wird eine tragbare Werkzeugmaschine, insbesondere eine Winkelschleifmaschine, mit einer erfindungsgemäßen Schnellspannvorrichtung vorgeschlagen. Unter einer "tragbaren Werkzeugmaschine" soll hier insbesondere eine Werkzeugmaschine zu einer Bearbeitung von Werkstücken verstanden werden, die von einem Bediener transportmaschinenlos transportiert werden kann. Die tragbare Werkzeugmaschine weist insbesondere eine Masse auf, die kleiner ist als 40 kg, bevorzugt kleiner ist als 10 kg und besonders bevorzugt kleiner ist als 5 kg. Besonders bevorzugt ist die tragbare Werkzeugmaschine als Winkelschleifmaschine ausgebildet. Es ist jedoch auch denkbar, dass die tragbare Werkzeugmaschine eine andere, einem Fachmann als sinnvoll erscheinende Ausgestaltung aufweist, wie beispielsweise eine Ausgestaltung als Kreissägemaschine, als Schleifmaschine o. dgl. Die tragbare Werkzeugmaschine umfasst vorzugsweise eine rotierend antreibbare Abtriebswelle. Vorzugsweise ist die Schnellspannvorrichtung an der Abtriebswelle angeordnet. Bevorzugt ist die Schnellspannvorrichtung zumindest teilweise in der Abtriebswelle angeordnet. Vorzugsweise ist die Abtriebswelle als Hohlwelle ausgebildet. Insbesondere bildet die tragbare Werkzeugmaschine zusammen mit einer Einsatzwerkzeugeinheit, die mittels der Schnellspannvorrichtung an der Abtriebswelle fixierbar ist, ein Werkzeugmaschinensystem. Mittels der erfindungsgemäßen Ausgestaltung der tragbaren Werkzeugmaschine kann vorteilhaft ein hoher Bedienkomfort realisiert werden. Es kann vorteilhaft infolge einer Bewegung des zumindest einen Krafteinleitungspunkts auf der Kontaktfläche eine Änderung eines Hebelarms zu einer Bewegung des Betätigungselements in Abhängigkeit von einer Bewegung des Bedienelements erreicht werden. Es kann vorteilhaft eine geringe Betätigungskraft zu einer Betätigung des als Bedienhebel ausgebildeten Bedienelements realisiert werden.Furthermore, a portable machine tool, in particular an angle grinder, is proposed with a quick-action clamping device according to the invention. A "portable machine tool" is to be understood here in particular as a machine tool for machining workpieces, which can be transported by an operator without a transport machine. In particular, the portable machine tool has a mass that is less than 40 kg, preferably less than 10 kg and particularly preferably less than 5 kg. The portable machine tool is particularly preferably designed as an angle grinder. However, it is also conceivable for the portable power tool to have a different design that would appear sensible to a person skilled in the art, such as a design as a circular saw machine, a grinding machine or the like. The portable power tool preferably includes a driven shaft that can be driven in rotation. The quick-action clamping device is preferably arranged on the output shaft. The quick-action clamping device is preferably arranged at least partially in the output shaft. The output shaft is preferably designed as a hollow shaft. In particular, the portable machine tool forms a machine tool system together with an insert tool unit that can be fixed to the output shaft by means of the quick-action clamping device. A high level of operating convenience can advantageously be achieved by means of the configuration of the portable machine tool according to the invention. Advantageously, as a result of a movement of the at least one force application point on the contact surface, a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element. Advantageously, a low actuating force can be used to actuate the operating element designed as an operating lever.

Zudem wird vorgeschlagen, dass die tragbare Werkzeugmaschine zumindest ein Getriebegehäuse umfasst, an dem das Bedienelement beweglich gelagert ist und im Nahbereich von zumindest einer Lüftungsöffnung des Getriebegehäuses angeordnet ist, wobei das Bedienelement zumindest in einem unbetätigten Zustand zumindest im Wesentlichen lüftungsöffnungsüberdeckungsfrei an dem Getriebegehäuse angeordnet ist. Bevorzugt ist das Bedienelement zumindest in der Ruheposition des Bedienelements lüftungsöffnungsüberdeckungsfrei an dem Getriebegehäuse angeordnet. Unter einem "Nahbereich" soll insbesondere ein Bereich verstanden werden, der einen maximalen Abstand relativ zu einem Element und/oder zu einer Einheit aufweist, der insbesondere kleiner ist als 100 mm, bevorzugt kleiner ist als 50 mm und besonders bevorzugt kleiner ist als 20 mm. Mittels der erfindungsgemäßen Ausgestaltung der tragbaren Werkzeugmaschine kann vorteilhaft ein hoher Bedienkomfort realisiert werden. Es kann vorteilhaft eine kompakte Anordnung der Bedieneinheit an der tragbaren Werkzeugmaschine realisiert werden.In addition, it is proposed that the portable machine tool comprises at least one gear housing on which the operating element is movably mounted and is arranged in the vicinity of at least one ventilation opening of the gear housing, the operating element being at least essentially free of ventilation openings on the gear housing in an unactuated state is arranged. The operating element is preferably arranged on the transmission housing without covering the ventilation openings, at least in the rest position of the operating element. A “near area” is to be understood in particular as an area that has a maximum distance relative to an element and/or a unit that is in particular less than 100 mm, preferably less than 50 mm and particularly preferably less than 20 mm . A high level of operating convenience can advantageously be achieved by means of the configuration of the portable machine tool according to the invention. A compact arrangement of the operating unit on the portable machine tool can advantageously be implemented.

Es zeigen:

Fig. 1
eine erfindungsgemäße tragbare Werkzeugmaschine mit einer erfindungsgemäßen Schnellspannvorrichtung in einer schematischen Darstellung,
Fig. 2
eine Schnittansicht der erfindungsgemäßen tragbaren Werkzeugmaschine und der erfindungsgemäßen Schnellspannvorrichtung in einer schematischen Darstellung,
Fig. 3
eine Detailansicht einer Bedieneinheit der erfindungsgemäßen Schnellspannvorrichtung, wobei ein Bedienelement in einer Kontaktposition des Bedienelements angeordnet ist, in einer schematischen Darstellung,
Fig. 4
eine Detailansicht der Bedieneinheit der erfindungsgemäßen Schnellspannvorrichtung, wobei das Bedienelement in einer Endposition des Bedienelements angeordnet ist, in einer schematischen Darstellung,
Fig. 5
eine Detailansicht des Bedienelements, das mittels einer Federkraft eines Federelements vorgespannt an einem Getriebegehäuse der erfindungsgemäßen tragbaren Werkzeugmaschine angeordnet ist in einer schematischen Darstellung,
Fig. 6
eine Explosionsdarstellung des Bedienelements in einer schematischen Darstellung und
Fig. 7
ein Kraftdiagramm einer Bedienelementkraft des Bedienelements in einer schematischen Darstellung.
Show it:
1
a portable machine tool according to the invention with a quick-action clamping device according to the invention in a schematic representation,
2
a sectional view of the portable machine tool according to the invention and the quick-release device according to the invention in a schematic representation,
3
a detailed view of an operating unit of the quick-release device according to the invention, wherein an operating element is arranged in a contact position of the operating element, in a schematic representation,
4
a detailed view of the operating unit of the quick-release device according to the invention, wherein the operating element is arranged in an end position of the operating element, in a schematic representation,
figure 5
a detailed view of the control element, which is arranged on a transmission housing of the portable machine tool according to the invention in a schematic representation, prestressed by means of a spring force of a spring element,
6
an exploded view of the control element in a schematic representation and
7
a force diagram of a control element force of the control element in a schematic representation.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Figur 1 zeigt eine als Winkelschleifmaschine ausgebildete tragbare Werkzeugmaschine 14 mit einer Schnellspannvorrichtung 10. Es ist jedoch auch denkbar, dass die tragbare Werkzeugmaschine 14 eine andere, einem Fachmann als sinnvoll erscheinende Ausgestaltung aufweist, wie beispielsweise eine Ausgestaltung als Kreissägemaschine, als Schleifmaschine o. dgl. Die tragbare Werkzeugmaschine 14 umfasst ein Getriebegehäuse 54 zu einer Aufnahme und/oder Lagerung einer Getriebeeinheit 58 der tragbaren Werkzeugmaschine 14. Das Getriebegehäuse 54 ist vorzugsweise aus einem metallischen Werkstoff gebildet. Es ist jedoch auch denkbar, dass das Getriebegehäuse 54 aus einem anderen, einem Fachmann als sinnvoll erscheinenden Werkstoff gebildet ist, wie beispielsweise aus Kunststoff o. dgl. Die Getriebeeinheit 58 ist vorzugsweise als Winkelgetriebe ausgebildet. Die Getriebeeinheit 58 umfasst insbesondere eine rotierend antreibbare Abtriebswelle 12, an der eine Einsatzwerkzeugeinheit 18 fixierbar ist, insbesondere mittels der Schnellspannvorrichtung 10. Die Abtriebswelle 12 ist vorzugsweise als Hohlspindel ausgebildet, in der die Schnellspannvorrichtung 10 zumindest teilweise angeordnet ist (Figur 2). An dem Getriebegehäuse 54 ist auf eine, einem Fachmann bereits bekannte Art und Weise eine hier nicht näher dargestellte Schutzhaubeneinheit anordenbar. An dem Getriebegehäuse 54 ist auf eine, einem Fachmann bereits bekannte Art und Weise ein hier nicht näher dargestellter Zusatzhandgriff anordenbar. Die tragbare Werkzeugmaschine 14 umfasst ein Motorgehäuse 60 zu einer Aufnahme und/oder Lagerung einer Antriebseinheit 62 der tragbaren Werkzeugmaschine 14. Die Antriebseinheit 62 ist vorzugsweise auf eine, einem Fachmann bereits bekannte Art und Weise dazu vorgesehen, mittels eines Zusammenwirkens mit der Getriebeeinheit 58 die Abtriebswelle 12 rotierend um eine Rotationsachse 64 der Abtriebswelle 12 anzutreiben. Die Rotationsachse 64 der Abtriebswelle 12 verläuft zumindest im Wesentlichen senkrecht zu einer Antriebsachse 66 der Antriebseinheit 62. Die Antriebseinheit 62 ist vorzugsweise als Elektromotoreinheit ausgebildet. Es ist jedoch auch denkbar, dass die Antriebseinheit 62 eine andere, einem Fachmann als sinnvoll erscheinende Ausgestaltung aufweist, wie beispielsweise eine Ausgestaltung als Verbrennungsantriebseinheit, als Hybridantriebseinheit, als Pneumatikantriebseinheit o. dgl. figure 1 shows a portable machine tool 14 designed as an angle grinder with a quick-action clamping device 10. It is also conceivable, however, for the portable machine tool 14 to have another configuration that would appear sensible to a person skilled in the art, such as a configuration as a circular saw machine, a grinder or the like. The portable Machine tool 14 includes a gear housing 54 for a recording and / or Storage of a gear unit 58 of the portable machine tool 14. The gear housing 54 is preferably made of a metallic material. However, it is also conceivable for the gear housing 54 to be made of another material that a person skilled in the art considers appropriate, such as plastic or the like. The gear unit 58 is preferably designed as an angular gear. The transmission unit 58 includes in particular a rotationally drivable output shaft 12 to which an insert tool unit 18 can be fixed, in particular by means of the quick-action clamping device 10. The output shaft 12 is preferably designed as a hollow spindle in which the quick-action clamping device 10 is at least partially arranged ( figure 2 ). A protective hood unit, not shown in detail here, can be arranged on the transmission housing 54 in a manner already known to a person skilled in the art. An additional handle, not shown in detail here, can be arranged on the transmission housing 54 in a manner already known to a person skilled in the art. Portable machine tool 14 includes a motor housing 60 for accommodating and/or supporting a drive unit 62 of portable machine tool 14. Drive unit 62 is preferably provided in a manner already known to a person skilled in the art to drive the output shaft by means of interaction with transmission unit 58 12 rotating about an axis of rotation 64 of the output shaft 12 to drive. The axis of rotation 64 of the output shaft 12 runs at least substantially perpendicular to a drive axis 66 of the drive unit 62. The drive unit 62 is preferably designed as an electric motor unit. However, it is also conceivable for the drive unit 62 to have a different design that would appear sensible to a person skilled in the art, such as a design as a combustion drive unit, as a hybrid drive unit, as a pneumatic drive unit or the like.

Figur 2 zeigt eine Schnittansicht der tragbaren Werkzeugmaschine 14, insbesondere im Bereich des Getriebegehäuses 54, und der Schnellspannvorrichtung 10. Die Schnellspannvorrichtung 10 für die zumindest die rotierend antreibbare Abtriebswelle 12 aufweisende tragbare Werkzeugmaschine 14 umfasst zumindest eine Spanneinheit 16, die zu einer werkzeuglosen Fixierung der Einsatzwerkzeugeinheit 18 an der Abtriebswelle 12 zumindest ein beweglich gelagertes Spannelement 20, 22 zu einer Spannkrafteinwirkung auf die Einsatzwerkzeugeinheit 18 in einer Spannposition des Spannelements 20, 22 aufweist. Ferner umfasst die Schnellspannvorrichtung 10 zumindest eine Bedieneinheit 24 zumindest zu einer Bewegung des Spannelements 20, 22 in eine Löseposition des Spannelements 20, 22, die zumindest ein beweglich gelagertes Bedienelement 26, insbesondere einen beweglich gelagerten Bedienhebel, aufweist. Die Spanneinheit 16 umfasst zumindest zwei beweglich gelagerte Spannelemente 20, 22. Es ist jedoch auch denkbar, dass die Spanneinheit 16 eine von zwei abweichende Anzahl an Spannelementen 20, 22 umfasst. Die zumindest zwei Spannelemente 20, 22 weisen eine zumindest im Wesentlichen analoge Ausgestaltung auf, so dass Merkmale, die zu einem der Spannelemente 20, 22 offenbart werden, als ebenso für das weitere Spannelement 20, 22 als offenbart anzusehen sind. Die zumindest zwei Spannelemente 20, 22 sind schwenkbar gelagert. Eine Schwenkachse 68 des Spannelements 20, 22, insbesondere der zumindest zwei Spannelemente 20, 22, verläuft zumindest im Wesentlichen senkrecht zur Rotationsachse 64 der Abtriebswelle 12. Die zumindest zwei Spannelemente 20, 22 sind dazu vorgesehen, die Einsatzwerkzeugeinheit 18 in einem an der Spanneinheit 16 und/oder der Abtriebswelle 12 angeordneten Zustand axial an der Abtriebswelle 12 zu fixieren, insbesondere in der Spannposition der zumindest zwei Spannelemente 20, 22. Die zumindest zwei Spannelemente 20, 22 sind drehfest mit der Abtriebswelle 12 verbunden. Die zumindest zwei Spannelemente 20, 22 sind zusammen mit der Abtriebswelle 12 rotierend um die Rotationsachse 64 antreibbar. figure 2 shows a sectional view of the portable machine tool 14, in particular in the area of the gear housing 54, and the quick-action clamping device 10. The quick-action clamping device 10 for the portable machine tool 14, which has at least the rotationally drivable output shaft 12, comprises at least one clamping unit 16, which is used to fix the insertion tool unit 18 in place without tools of the output shaft 12 has at least one movably mounted clamping element 20, 22 to exert a clamping force on the insertion tool unit 18 in a clamping position of the clamping element 20, 22. Also included the quick-action clamping device 10 has at least one operating unit 24, at least for moving the clamping element 20, 22 into a release position of the clamping element 20, 22, which has at least one movably mounted operating element 26, in particular a movably mounted operating lever. The clamping unit 16 comprises at least two movably mounted clamping elements 20, 22. However, it is also conceivable that the clamping unit 16 comprises a number of clamping elements 20, 22 that differs from two. The at least two clamping elements 20, 22 have an at least essentially analogous configuration, so that features that are disclosed for one of the clamping elements 20, 22 are also to be regarded as disclosed for the other clamping element 20, 22. The at least two clamping elements 20, 22 are pivotably mounted. A pivot axis 68 of the clamping element 20, 22, in particular of the at least two clamping elements 20, 22, runs at least substantially perpendicularly to the axis of rotation 64 of the output shaft 12. The at least two clamping elements 20, 22 are intended to fasten the insertion tool unit 18 in one on the clamping unit 16 and/or the output shaft 12 arranged state axially on the output shaft 12, in particular in the clamping position of the at least two clamping elements 20, 22. The at least two clamping elements 20, 22 are rotatably connected to the output shaft 12. The at least two tensioning elements 20, 22 can be driven together with the output shaft 12 to rotate about the axis of rotation 64.

Die Spanneinheit 16 umfasst zu einer Drehmomentübertragung auf die Einsatzwerkzeugeinheit 18 zumindest ein Drehmitnahmeelement 70. Das Drehmitnahmeelement 70 greift in einem an der Spanneinheit 16 und/oder der Abtriebswelle 12 angeordneten Zustand der Einsatzwerkzeugeinheit 18 in eine Aufnahmeausnehmung (hier nicht näher dargestellt) der Einsatzwerkzeugeinheit 18 ein und liegt zu einer Drehmomentübertragung an zumindest einem die Aufnahmeausnehmung begrenzenden Rand der Einsatzwerkzeugeinheit 18 an. Eine Drehmomentübertragung zwischen der Abtriebswelle 12 und der an der Spanneinheit 16 und/oder der Abtriebswelle 12 angeordneten Einsatzwerkzeugeinheit 18 erfolgt vorzugsweise auf eine, einem Fachmann bereits bekannte Art und Weise mittels einer formschlüssigen Verbindung zwischen dem Drehmitnahmeelement 70 und der Einsatzwerkzeugeinheit 18. Das Drehmitnahmeelement 70 ist drehfest an der Abtriebswelle 12 angeordnet. Das Drehmitnahmeelement 70 ist zusammen mit der Abtriebswelle 12 rotierend um die Rotationsachse 64 antreibbar.The clamping unit 16 comprises at least one rotary driver element 70 for torque transmission to the tool insert unit 18. When the tool insert unit 18 is arranged on the clamping unit 16 and/or the output shaft 12, the rotary driver element 70 engages in a receiving recess (not shown here) of the tool insert unit 18 and is in contact with at least one edge of the insertion tool unit 18 that delimits the receiving recess for torque transmission. Torque is transmitted between the output shaft 12 and the tool insert unit 18 arranged on the clamping unit 16 and/or the output shaft 12, preferably in a manner already known to a person skilled in the art by means of a positive connection between the rotary driver element 70 and the tool insert unit 18. The rotary driver element 70 is arranged in a rotationally fixed manner on the output shaft 12 . The rotary driver element 70 can be driven together with the output shaft 12 to rotate about the axis of rotation 64 .

Die Bedieneinheit 24 ist vorzugsweise dazu vorgesehen, das Spannelement 20, 22, insbesondere die zumindest zwei Spannelemente 20, 22, zumindest in die Löseposition zu bewegen, in der die Einsatzwerkzeugeinheit 18 von der Spanneinheit 16 und/oder der Abtriebswelle 12 abnehmbar ist. Alternativ oder zusätzlich ist es denkbar, dass die Bedieneinheit 24 dazu vorgesehen ist, das Spannelement 20, 22, insbesondere die zumindest zwei Spannelemente 20, 22, zumindest in die Spannposition zu bewegen, in der die Einsatzwerkzeugeinheit 18 mittels der Spanneinheit 16 an der Abtriebswelle 12 fixierbar ist. Die Bedieneinheit 24 umfasst vorzugweise zumindest das Bedienelement 26, das von einem Bediener betätigbar ist. Das Bedienelement 26 ist als Bedienhebel ausgebildet. Das Bedienelement 26 umfasst eine Bewegungsachse 36, insbesondere eine Schwenkachse, die quer, insbesondere zumindest im Wesentlichen senkrecht, zur Rotationsachse 64 der Abtriebswelle 12 verläuft. Das Bedienelement 26 ist vorzugsweise um die Bewegungsachse 36, insbesondere Schwenkachse, des Bedienelements 26 schwenkbar gelagert. Das Bedienelement 26 ist von einer Drehbewegung der Abtriebswelle 12 entkoppelt. Das Bedienelement 26 ist beweglich am Getriebegehäuse 54 gelagert und im Nahbereich von zumindest einer Lüftungsöffnung 56 des Getriebegehäuses 54 angeordnet, wobei das Bedienelement 26 zumindest in einem unbetätigten Zustand, insbesondere in einer Ruheposition des Bedienelements 26, zumindest im Wesentlichen lüftungsöffnungsüberdeckungsfrei an dem Getriebegehäuse 54 angeordnet ist. Das Bedienelement 26 ist teilweise in eine Ausnehmung 76 des Getriebegehäuses 54 hinein bewegbar. Ein Betätigungselement 34 der Bedieneinheit 24, das mittels des Bedienelements 26 betätigbar und/oder bewegbar ist, erstreckt sich zumindest teilweise in die Ausnehmung 76 hinein. Zu einer Reinigung der Ausnehmung 76 ist es denkbar, dass Schmutz infolge einer Bewegung des Bedienelements 26 um eine Bewegungsachse 36 des Bedienelements 26 mittels eines Exzenterabschnitts 72 des Bedienelements 26 zumindest teilweise aus der Ausnehmung 76 hinaus förderbar ist. Es ist denkbar, dass das Bedienelement 26 zumindest ein Bürstenelement aufweist, das am Exzenterabschnitt 72 angeordnet sind und dazu vorgesehen ist, die Ausnehmung 76 infolge einer Bewegung des Bedienelements 26 auszukehren. Es ist auch denkbar, dass die zumindest eine Lüftungsöffnung 56 derart am Getriebegehäuse 54 angeordnet ist, dass ein aus der Lüftungsöffnung 56 austretender Luftstrom zu einer Reinigung der Ausnehmung 76 nutzbar ist.Operating unit 24 is preferably provided to move clamping element 20, 22, in particular the at least two clamping elements 20, 22, at least into the release position in which insert tool unit 18 can be removed from clamping unit 16 and/or output shaft 12. Alternatively or additionally, it is conceivable that the operating unit 24 is provided for moving the clamping element 20, 22, in particular the at least two clamping elements 20, 22, at least into the clamping position in which the insertion tool unit 18 can be clamped by means of the clamping unit 16 on the output shaft 12 is fixable. The operating unit 24 preferably includes at least the operating element 26, which can be actuated by an operator. The operating element 26 is designed as an operating lever. The operating element 26 comprises a movement axis 36, in particular a pivot axis, which runs transversely, in particular at least essentially perpendicularly, to the axis of rotation 64 of the output shaft 12. The control element 26 is preferably pivotably mounted about the axis of movement 36, in particular the pivot axis, of the control element 26. The operating element 26 is decoupled from a rotary movement of the output shaft 12 . Operating element 26 is movably mounted on transmission housing 54 and is arranged in the vicinity of at least one ventilation opening 56 in transmission housing 54, with operating element 26 being arranged on transmission housing 54 at least substantially without a ventilation opening covering it, at least in an unactuated state, in particular when operating element 26 is in a rest position . The operating element 26 can be partially moved into a recess 76 in the transmission housing 54 . An actuating element 34 of the operating unit 24, which can be actuated and/or moved by means of the operating element 26, extends at least partially into the recess 76. For cleaning the recess 76 it is conceivable that dirt as a result of a movement of the operating element 26 about a movement axis 36 of the operating element 26 can be at least partially conveyed out of the recess 76 by means of an eccentric section 72 of the operating element 26 . It is conceivable that the operating element 26 has at least one brush element, which is arranged on the eccentric section 72 and is intended to sweep out the recess 76 as a result of a movement of the operating element 26 . It is also conceivable that the at least one ventilation opening 56 is arranged on the gear housing 54 in such a way that a 56 exiting air flow to clean the recess 76 is usable.

Das Spannelement 20, 22, insbesondere die Spannelemente 20, 22, ist/sind beweglich, insbesondere schwenkbar an der Abtriebswelle 12, insbesondere in der Abtriebswelle 12, gelagert. Die Schwenkachse 68 des Spannelements 20, 22, insbesondere der Spannelemente 20, 22, verläuft vorzugsweise zumindest im Wesentlichen senkrecht zur Spannachse 78 der Spanneinheit 16a. Das Spannelement 20, 22, insbesondere die Spannelemente 20, 22, weist/weisen zumindest ein Bewegungskulissenelement auf, das dazu vorgesehen ist, mit einem Kulisseneingriffselement der Spanneinheit 16 zusammenzuwirken. Das Kulisseneingriffselement ist an einem Übertragungselement 100 der Spanneinheit 16 fixiert. Das Kulisseneingriffselement ist als Bolzen ausgebildet, der an dem Übertragungselement 100 fixiert ist, insbesondere zwischen zwei Gabelenden des Übertragungselements 100. Infolge eines Zusammenwirkens des Kulisseneingriffselements und des Bewegungskulissenelements ist/sind das Spannelement 20, 22, insbesondere die Spannelemente 20, 22, ausgehend von der Spannposition in die Löseposition bewegbar oder von der Löseposition in die Spannposition bewegbar. Das Spannelement 20, 22, insbesondere die Spannelemente 20, 22, ist/sind insbesondere mittels einer Einwirkung einer Federkraft eines Spannfederelements 102 der Spanneinheit 16 auf das Übertragungselement 100 ausgehend von der Löseposition in die Spannposition bewegbar. Das Spannelement 20, 22, insbesondere die Spannelemente 20, 22, ist/sind selbsttätig, insbesondere nach Wegnahme einer Einwirkung einer Bedienerkraft über die Bedieneinheit 24, infolge einer Einwirkung einer Federkraft des Spannfederelements 102 in die Spannposition bewegbar.The clamping element 20, 22, in particular the clamping elements 20, 22, is/are movably, in particular pivotably, mounted on the output shaft 12, in particular in the output shaft 12. The pivot axis 68 of the clamping element 20, 22, in particular of the clamping elements 20, 22, preferably runs at least substantially perpendicularly to the clamping axis 78 of the clamping unit 16a. The tensioning element 20 , 22 , in particular the tensioning elements 20 , 22 , has/have at least one movement link element which is intended to interact with a link engagement element of the tensioning unit 16 . The link engagement element is fixed to a transmission element 100 of the tensioning unit 16 . The link engagement element is designed as a bolt that is fixed to the transmission element 100, in particular between two fork ends of the transmission element 100. As a result of the interaction of the link engagement element and the movement link element, the clamping element 20, 22, in particular the clamping elements 20, 22, starting from the Clamping position movable into the release position or movable from the release position into the clamping position. The clamping element 20, 22, in particular the clamping elements 20, 22, is/are movable from the release position into the clamping position, in particular by means of the action of a spring force of a clamping spring element 102 of the clamping unit 16 on the transmission element 100. The clamping element 20, 22, in particular the clamping elements 20, 22, is/are automatically movable into the clamping position, in particular after the action of an operator force has been removed via the operating unit 24, as a result of the action of a spring force of the clamping spring element 102.

Die Schnellspannvorrichtung 10 umfasst zumindest eine Entkopplungseinheit 86, die dazu vorgesehen ist, die Bedieneinheit 24 in Abhängigkeit von einer Drehzahl der Abtriebswelle 12 von der Spanneinheit 16 zu entkoppeln. Die Entkopplungseinheit 86 ist derart ausgebildet, dass in Abhängigkeit von einer Drehzahl der Abtriebswelle 12 eine Relativbewegung zwischen zumindest einem Entkopplungselement 94 der Entkopplungseinheit 86 und zumindest dem Betätigungselement 34 der Bedieneinheit 24 zu einer Entkopplung der Bedieneinheit 24 von der Spanneinheit 16 erfolgt. Die Entkopplungseinheit 86 umfasst zumindest das beweglich gelagerte Entkopplungselement 94, das in Abhängigkeit von einer Drehzahl der Abtriebswelle 12 in eine Entkopplungsposition überführbar ist, in der die Bedieneinheit 24 von der Spanneinheit 16 entkoppelt ist. Die Entkopplungseinheit 86 ist vorzugsweise als Reibungsentkopplungseinheit ausgebildet. Die Entkopplungseinheit 86 weist zumindest das beweglich gelagerte Entkopplungselement 94 auf, das infolge einer Reibkraft zwischen dem Entkopplungselement 94 und dem Betätigungselement 34 der Bedieneinheit 24 relativ zur Abtriebswelle 12 bewegbar ist. Die Entkopplungseinheit 86 weist zumindest das beweglich gelagerte Entkopplungselement 94 auf, das entlang der und/oder um die Rotationsachse 64 der Abtriebswelle 12 in der Abtriebswelle 12 beweglich gelagert ist. Die Entkopplungseinheit 86 umfasst zumindest das beweglich gelagerte Entkopplungselement 94 und zumindest ein Entkopplungsfederelement 96, das das Entkopplungselement 94 mit einer Federkraft in Richtung der Bedieneinheit 24 beaufschlagt. Die Entkopplungseinheit 86 weist zumindest das beweglich gelagerte Entkopplungselement 94 und zumindest ein Kulissenelement 98 zu einer Führung des Entkopplungselements 94 bei einer Relativbewegung des Entkopplungselements 94 relativ zur Abtriebswelle 12 auf.The quick-action clamping device 10 comprises at least one decoupling unit 86 which is provided for decoupling the operating unit 24 from the clamping unit 16 as a function of a rotational speed of the output shaft 12 . Decoupling unit 86 is configured such that, depending on the rotational speed of output shaft 12, a relative movement takes place between at least one decoupling element 94 of decoupling unit 86 and at least actuating element 34 of operating unit 24 to decouple operating unit 24 from clamping unit 16. The decoupling unit 86 includes at least that movably mounted decoupling element 94, which can be converted into a decoupling position depending on a rotational speed of the output shaft 12, in which the operating unit 24 is decoupled from the clamping unit 16. The decoupling unit 86 is preferably designed as a friction decoupling unit. The decoupling unit 86 has at least the movably mounted decoupling element 94 which can be moved relative to the output shaft 12 as a result of a frictional force between the decoupling element 94 and the actuating element 34 of the operating unit 24 . The decoupling unit 86 has at least the movably mounted decoupling element 94 which is movably mounted in the output shaft 12 along and/or around the axis of rotation 64 of the output shaft 12 . The decoupling unit 86 comprises at least the movably mounted decoupling element 94 and at least one decoupling spring element 96 which applies a spring force to the decoupling element 94 in the direction of the operating unit 24 . The decoupling unit 86 has at least the movably mounted decoupling element 94 and at least one link element 98 for guiding the decoupling element 94 during a relative movement of the decoupling element 94 relative to the output shaft 12 .

Das Entkopplungselement 94 ist mittels einer kraftschlüssigen Verbindung mit dem Betätigungselement 34 in Kontakt bringbar oder das Entkopplungselement 94 steht mittels einer kraftschlüssigen Verbindung mit dem Betätigungselement 34 in Kontakt. Das Entkopplungselement 94 ist vorzugsweise translatorisch entlang der Rotationsachse 64 beweglich gelagert, insbesondere in der Abtriebswelle 12 oder in dem Übertragungselement 100 der Spanneinheit 16. Das Entkopplungselement 94 umfasst insbesondere einen konischen Verbindungsbereich, der zumindest teilweise in eine Ausnehmung des Betätigungselements 34 eingreift. Eine Reibwirkung zwischen dem Betätigungselement 34 und dem Entkopplungselement 94 ist insbesondere abhängig von einer Ausgestaltung des konischen Verbindungsbereichs und einer Federkraft des Entkopplungsfederelements 96. Das Entkopplungsfederelement 96 ist dazu vorgesehen, das Entkopplungselement 94 mit einer Federkraft in Richtung des Betätigungselements 34 zu beaufschlagen. Das Entkopplungsfederelement 96 ist in dem Übertragungselement 100 der Spanneinheit 16 angeordnet. Das Übertragungselement 100 ist als Spanngabel ausgebildet. Das Übertragungselement 100 ist drehfest mit der Abtriebswelle 12 verbunden. Das Übertragungselement 100 ist entlang einer Spannachse 78 der Spanneinheit 16 translatorisch bewegbar. Das Übertragungselement 100 ist in der Abtriebswelle 12 beweglich gelagert. Das Übertragungselement 100 ist zumindest mittels des Spannfederelements 102 der Spanneinheit 16 entlang der Spannachse 78, insbesondere in Richtung der Bedieneinheit 24, mit einer Federkraft beaufschlagbar.The decoupling element 94 can be brought into contact with the actuating element 34 by means of a non-positive connection, or the decoupling element 94 is in contact with the actuating element 34 by means of a non-positive connection. The decoupling element 94 is preferably movably mounted in translation along the axis of rotation 64, in particular in the output shaft 12 or in the transmission element 100 of the tensioning unit 16. The decoupling element 94 comprises in particular a conical connection region which at least partially engages in a recess of the actuating element 34. A frictional effect between the actuating element 34 and the decoupling element 94 is dependent in particular on the configuration of the conical connection region and a spring force of the decoupling spring element 96. The decoupling spring element 96 is intended to apply a spring force to the decoupling element 94 in the direction of the actuating element 34. The decoupling spring element 96 is arranged in the transmission element 100 of the clamping unit 16 . The transmission element 100 is designed as a clamping fork. The transmission element 100 is connected to the output shaft 12 in a torque-proof manner. The transmission element 100 is along a clamping axis 78 of the clamping unit 16 can be moved in translation. The transmission element 100 is movably mounted in the output shaft 12 . The transmission element 100 can be subjected to a spring force at least by means of the tensioning spring element 102 of the tensioning unit 16 along the tensioning axis 78 , in particular in the direction of the operating unit 24 .

Die Entkopplungseinheit 86 weist zumindest ein Verbindungselement 104 auf, das dazu vorgesehen ist, das Entkopplungselement 94 und das Übertragungselement 100 bewegungstechnisch miteinander zu verbinden, insbesondere zumindest in einem Zustand der Abtriebswelle 12 mit einer geringen Drehzahl oder in einem Stillstand der Abtriebswelle 12. Das Verbindungselement 104 ist als Bolzen ausgebildet. Das Verbindungselement 104 ist am Entkopplungselement 94 angeordnet, insbesondere fixiert. Das Verbindungselement 104 ist zusammen mit dem Entkopplungselement 94 bewegbar. Das Verbindungselement 104 erstreckt sich in das Kulissenelement 98 der Entkopplungseinheit 86 (Figur 2). Das Kulissenelement 98 ist als Kulissenführungsbahn ausgebildet. Das Kulissenelement 98 ist am Übertragungselement 100 angeordnet, insbesondere einteilig mit dem Übertragungselement 100 ausgebildet. Bei einer Rotationsbewegung der Abtriebswelle 12 ist das Entkopplungselement 94 und das Verbindungselement 104 infolge einer Bremsung durch eine Betätigung des Betätigungselements 34 relativ zum Übertragungselement 100 drehbar, wobei das Verbindungselement 104 derart in dem als Kulissenführungsbahn ausgebildeten Kulissenelement 98 bewegbar ist, dass das Entkopplungselement 94 gegen eine Federkraft des Entkopplungsfederelements 96 in eine Führungsausnehmung 106 des Übertragungselements 100 bewegbar ist. Eine Betätigung des Bedienelements 26 während einer Drehbewegung der Abtriebswelle 12 ist in eine Bewegung des Betätigungselements 34 und des Entkopplungselements 94 relativ zum Übertragungselement 100 überführbar. Eine Bewegung des Übertragungselements 100 infolge einer Einwirkung einer Bedienerkraft mittels der Bedieneinheit 24 zu einer Überführung des Spannelements 20, 22, insbesondere der Spannelemente 20, 22, ausgehend von der Spannposition in die Löseposition während einer Drehbewegung der Abtriebswelle 12 ist weitestgehend unterbindbar. Bei einer geringen Drehzahl der Abtriebswelle 12 oder bei einem Stillstand der Abtriebswelle 12 ist eine von dem Betätigungselement 34 auf das Entkopplungselement 94 wirkende Axialkraft mittels eines Zusammenwirkens des Verbindungselements 104 und dem als Kulissenführungsbahn ausgebildeten Kulissenelement 98 auf das Übertragungselement 100 übertragbar. Das Übertragungselement 100 ist mittels der Bedieneinheit 24 gegen eine Federkraft des Spannfederelements 102 bewegbar. Das Übertragungselement 100 ist dazu vorgesehen, das Spannelement 20, 22, insbesondere die Spannelemente 20, 22, ausgehend von der Spannposition in die Löseposition zu bewegen.Decoupling unit 86 has at least one connecting element 104, which is provided to connect the decoupling element 94 and the transmission element 100 to one another in terms of movement, in particular at least when the output shaft 12 is in a state with a low rotational speed or when the output shaft 12 is stationary. The connecting element 104 is designed as a bolt. The connecting element 104 is arranged, in particular fixed, on the decoupling element 94 . The connecting element 104 can be moved together with the decoupling element 94 . The connecting element 104 extends into the link element 98 of the decoupling unit 86 ( figure 2 ). The link element 98 is designed as a link guide track. The gate element 98 is arranged on the transmission element 100, in particular formed in one piece with the transmission element 100. When the output shaft 12 rotates, the decoupling element 94 and the connecting element 104 can be rotated relative to the transmission element 100 as a result of braking by actuating the actuating element 34, with the connecting element 104 being movable in the link element 98 designed as a slotted guide track in such a way that the decoupling element 94 counteracts a Spring force of the decoupling spring element 96 can be moved into a guide recess 106 of the transmission element 100 . An actuation of the operating element 26 during a rotational movement of the output shaft 12 can be converted into a movement of the actuating element 34 and the decoupling element 94 relative to the transmission element 100 . A movement of the transmission element 100 as a result of the action of an operator force by means of the operating unit 24 to transfer the clamping element 20, 22, in particular the clamping elements 20, 22, starting from the clamping position into the release position during a rotary movement of the output shaft 12 can be prevented as far as possible. When the speed of the output shaft 12 is low or when the output shaft 12 is at a standstill, an axial force acting on the decoupling element 94 from the actuating element 34 by means of the interaction of the connecting element 104 and can be transferred to the transmission element 100 using the link element 98 designed as a link guide track. The transmission element 100 can be moved by means of the operating unit 24 against a spring force of the tension spring element 102 . The transmission element 100 is provided to move the clamping element 20, 22, in particular the clamping elements 20, 22, starting from the clamping position into the release position.

Das Bedienelement 26 umfasst den Exzenterabschnitt 72 zu einer Betätigung des Betätigungselements 34 der Bedieneinheit 24. Das Betätigungselement 34 ist translatorisch beweglich entlang der Rotationsachse 64 gelagert, insbesondere in der Abtriebswelle 12 und/oder im Getriebegehäuse 54. Das Betätigungselement 34 ist gegen eine Verdrehung relativ zum Getriebegehäuse 54 im Getriebegehäuse 54 fixiert, insbesondere infolge zumindest einer seitlichen Abflachung des Betätigungselements 34, die eine axiale Bewegung ermöglicht und eine rotatorische Bewegung unterbindet. Vorzugsweise weist das Betätigungselement 34 an zwei sich abgewandten Seiten des Betätigungselements 34 jeweils zumindest eine Abflachung auf. Es ist jedoch auch denkbar, dass das Betätigungselement 34 eine andere, einem Fachmann als sinnvoll erscheinende Ausgestaltung aufweist, wie beispielsweise einen polygonalen Querschnitt, eine Verzahnung o. dgl., die dazu vorgesehen ist, das Betätigungselement 34 gegen eine Verdrehung relativ zum Getriebegehäuse 54 zu sichern. Im Bereich des Betätigungselements 34 ist vorzugsweise ein Dichtungselement 74, wie beispielsweise eine Gummidichtung o. dgl., angeordnet, um insbesondere ein Eindringen von Schmutz in das Getriebegehäuse 54 und/oder in die Spanneinheit 16 zumindest weitestgehend zu vermeiden. Das Dichtungselement 74 liegt vorzugsweise an dem Betätigungselement 34 an. Das Betätigungselement 34 ist insbesondere relativ zum Dichtungselement 74 beweglich gelagert. Das Betätigungselement 34 gleitet bei einer Bewegung relativ zum Dichtungselement 74 an zumindest einer Dichtfläche des Dichtungselements 74.Operating element 26 includes eccentric section 72 for actuating operating element 34 of operating unit 24. Actuating element 34 is mounted so that it can move in a translatory manner along axis of rotation 64, in particular in output shaft 12 and/or in transmission housing 54. Actuating element 34 is secured against rotation relative to the Transmission housing 54 is fixed in the transmission housing 54, in particular as a result of at least one lateral flattening of the actuating element 34, which enables axial movement and prevents rotational movement. The actuating element 34 preferably has at least one flattening on each of two opposite sides of the actuating element 34 . However, it is also conceivable for the actuating element 34 to have a different configuration that would appear sensible to a person skilled in the art, such as a polygonal cross section, toothing or the like, which is provided to prevent the actuating element 34 from twisting relative to the transmission housing 54 to back up. A sealing element 74, such as a rubber seal or the like, is preferably arranged in the area of the actuating element 34, in order to prevent dirt from penetrating into the transmission housing 54 and/or into the tensioning unit 16 at least as far as possible. The sealing element 74 is preferably in contact with the actuating element 34 . The actuating element 34 is in particular movably mounted relative to the sealing element 74 . When moving relative to sealing element 74, actuating element 34 slides on at least one sealing surface of sealing element 74.

Das Bedienelement 26 weist zu einer Bewegung des Spannelements 20, 22, insbesondere der Spannelemente 20, 22, in die Löseposition zumindest eine Betätigungsfläche 28 auf, die derart angeordnet ist, dass zumindest ein Krafteinleitungspunkt 30 des Bedienelements 26 bei einem Zusammenwirken mit einer Kontaktfläche 32 eines beweglich gelagerten Betätigungselements 34 der Bedieneinheit 24 in Abhängigkeit von einer Bewegung des Bedienelements 26 auf der Kontaktfläche 32 bewegbar ist (vgl. Figuren 3 und 4). Die Betätigungsfläche 28 des Bedienelements 26 ist bevorzugt an dem Exzenterabschnitt 72 des Bedienelements 26 angeordnet. Vorzugsweise erfolgt bei einem Zusammenwirken der Betätigungsfläche 28 des Bedienelements 26 und der Kontaktfläche 32 des Betätigungselements 34 ein Linienkontakt zwischen der Betätigungsfläche 28 des Bedienelements 26 und der Kontaktfläche 32 des Betätigungselements 34. Der zumindest eine Krafteinleitungspunkt 30 des Bedienelements 26 ist vorzugsweise auf einer Kontaktlinie der Betätigungsfläche 28 des Bedienelements 26 angeordnet. Bevorzugt erfolgt bei einem Zusammenwirken der Betätigungsfläche 28 des Bedienelements 26 und der Kontaktfläche 32 des Betätigungselements 34 ein Linienkontakt zwischen der Betätigungsfläche 28 des Bedienelements 26 und der Kontaktfläche 32 des Betätigungselements 34 entlang der Kontaktlinie der Betätigungsfläche 28 des Bedienelements 26. Es ist jedoch auch denkbar, dass bei einem Zusammenwirken der Betätigungsfläche 28 des Bedienelements 26 und der Kontaktfläche 32 des Betätigungselements 34 ein punktförmiger Kontakt erfolgt, wobei der punktförmige Kontakt an dem zumindest einen Krafteinleitungspunkt 30 des Bedienelements 26 erfolgt. Vorzugsweise wird der zumindest eine Krafteinleitungspunkt 30 des Bedienelements 26 von einem Berührungspunkt der Betätigungsfläche 28 des Bedienelements 26 gebildet, der dazu vorgesehen ist, bei einem Zusammenwirken der Betätigungsfläche 28 des Bedienelements 26 und der Kontaktfläche 32 des Betätigungselements 34 an der Kontaktfläche 32 des Betätigungselements 34 anzuliegen (Figuren 3 und 4).To move the clamping element 20, 22, in particular the clamping elements 20, 22, into the release position, the operating element 26 has at least one actuating surface 28, which is arranged such that at least one force application point 30 of the operating element 26 when interacting with a contact surface 32 movably mounted actuating element 34 of the operating unit 24 can be moved on the contact surface 32 as a function of a movement of the operating element 26 (cf. Figures 3 and 4 ). The actuating surface 28 of the operating element 26 is preferably arranged on the eccentric section 72 of the operating element 26 . Preferably, when actuating surface 28 of operating element 26 and contact surface 32 of actuating element 34 interact, there is linear contact between actuating surface 28 of operating element 26 and contact surface 32 of actuating element 34. The at least one force application point 30 of operating element 26 is preferably on a contact line of the actuating surface 28 of the operating element 26 is arranged. Preferably, when the actuating surface 28 of the operating element 26 and the contact surface 32 of the actuating element 34 interact, there is linear contact between the actuating surface 28 of the operating element 26 and the contact surface 32 of the actuating element 34 along the contact line of the actuating surface 28 of the operating element 26. However, it is also conceivable that when the actuating surface 28 of the operating element 26 and the contact surface 32 of the actuating element 34 interact, a punctiform contact takes place, the punctiform contact taking place at the at least one force application point 30 of the operating element 26. Preferably, the at least one force application point 30 of the operating element 26 is formed by a point of contact of the operating surface 28 of the operating element 26, which is intended to bear against the contact surface 32 of the operating element 34 when the operating surface 28 of the operating element 26 and the contact surface 32 of the operating element 34 interact ( Figures 3 and 4 ).

Das Bedienelement 26 weist die Bewegungsachse 36, insbesondere eine Schwenkachse, auf, die relativ zu einer Bewegungsachse 38 des Betätigungselements 34 versetzt, insbesondere windschief, angeordnet ist. Die Bewegungsachse 38 des Betätigungselements 34 verläuft vorzugsweise zumindest im Wesentlichen parallel, insbesondere koaxial, zu einer Spannachse 78 der Spanneinheit 16 und/oder zur Rotationsachse 64 der Abtriebswelle 12. Die Spannachse 78 verläuft bevorzugt zumindest im Wesentlichen parallel, insbesondere koaxial, zur Rotationsachse 64 der Abtriebswelle 12. Das Bedienelement 26 weist die Bewegungsachse 36 auf, wobei eine durch die Bewegungsachse 36 des Bedienelements 26 und den Krafteinleitungspunkt 30 verlaufende Gerade 40 mit der Kontaktfläche 32 des Betätigungselements 34 in Abhängigkeit von einer Betätigungsposition und/oder Bewegungsposition des Bedienelements 26 in einer zumindest im Wesentlichen senkrecht zur Bewegungsachse 36 des Bedienelements 26 verlaufenden Ebene einen Winkel 42 aus einem Winkelbereich von 35° bis 85° einschließen (vgl. Figuren 3 und 4). Vorzugsweise schließt die durch die Bewegungsachse 36 des Bedienelements 26 und den Krafteinleitungspunkt 30 verlaufende Gerade 40 in einer Betätigungsposition und/oder Bewegungsposition des Bedienelements 26, in der das Bedienelement 26 ausgehend von einer Ruheposition des Bedienelements 26 (Figur 2) in eine Kontaktposition des Bedienelements 26 (Figur 3) bewegt ist, mit der Kontaktfläche 32 des Betätigungselements 34 einen Winkel 42 ein, der kleiner ist als 50° und größer ist als 35°, insbesondere einen Winkel 42 mit einem Wert von 40° (Figur 3). In der Kontaktposition des Bedienelements 26 liegt vorzugsweise die Betätigungsfläche 28 an der Kontaktfläche 32 an, wobei das Betätigungselement 34 entlang der Bewegungsachse 38 des Betätigungselements 34 durch das Bedienelement 26 unbewegt ist. Bevorzugt schließt die durch die Bewegungsachse 36 des Bedienelements 26 und den Krafteinleitungspunkt 30 verlaufende Gerade 40 in einer Betätigungsposition und/oder Bewegungsposition des Bedienelements 26, in der das Bedienelement 26 ausgehend von der Ruheposition (Figuren 2 und 5) oder ausgehend von der Kontaktposition (Figur 3) in eine Endposition des Bedienelements 26 bewegt ist (Figur 4), mit der Kontaktfläche 32 des Betätigungselements 34 einen Winkel 42 ein, der kleiner ist als 90° und größer ist als 70°, insbesondere einen Winkel 42 mit einem Wert von 80°. In der Endposition des Bedienelements 26 liegt vorzugsweise die Betätigungsfläche 28 an der Kontaktfläche 32 an, wobei das Betätigungselement 34 entlang der Bewegungsachse 38 des Betätigungselements 34 maximal mittels des Bedienelements 26 bewegt ist.The operating element 26 has the movement axis 36, in particular a pivot axis, which is offset relative to a movement axis 38 of the actuating element 34, in particular skewed. The axis of movement 38 of the actuating element 34 preferably runs at least essentially parallel, in particular coaxially, to a clamping axis 78 of the clamping unit 16 and/or to the axis of rotation 64 of the output shaft 12. The clamping axis 78 preferably runs at least essentially parallel, in particular coaxially, to the axis of rotation 64 of the Output shaft 12. The operating element 26 has the movement axis 36, with a straight line 40 running through the movement axis 36 of the operating element 26 and the force application point 30 having the contact surface 32 of the operating element 34 depending on an operating position and/or movement position of operating element 26 in a plane running at least essentially perpendicularly to movement axis 36 of operating element 26 enclose an angle 42 from an angle range of 35° to 85° (cf. Figures 3 and 4 ). The straight line 40 running through the movement axis 36 of the operating element 26 and the force application point 30 preferably closes in an actuation position and/or movement position of the operating element 26, in which the operating element 26 is in a rest position of the operating element 26 ( figure 2 ) into a contact position of the operating element 26 ( figure 3 ) is moved, forms an angle 42 with the contact surface 32 of the actuating element 34 which is smaller than 50° and larger than 35°, in particular an angle 42 with a value of 40° ( figure 3 ). When the operating element 26 is in the contact position, the operating surface 28 is preferably in contact with the contact surface 32 , with the operating element 34 not being moved by the operating element 26 along the movement axis 38 of the operating element 34 . The straight line 40 running through the movement axis 36 of the operating element 26 and the force application point 30 preferably closes in an actuation position and/or movement position of the operating element 26, in which the operating element 26 is in the rest position ( figures 2 and 5 ) or starting from the contact position ( figure 3 ) is moved into an end position of the operating element 26 ( figure 4 ), with the contact surface 32 of the actuating element 34 an angle 42 which is smaller than 90 ° and larger than 70 °, in particular an angle 42 with a value of 80 °. In the end position of the operating element 26 , the operating surface 28 is preferably in contact with the contact surface 32 , with the operating element 34 being moved along the movement axis 38 of the operating element 34 at most by means of the operating element 26 .

Der Krafteinleitungspunkt 30 ist infolge einer Bewegung des Bedienelements 26 entlang einer Geraden auf der Kontaktfläche 32 bewegbar, insbesondere bei einer Bewegung des Bedienelements 26 ausgehend von der Kontaktposition des Bedienelements 26 in die Endposition des Bedienelements 26. Der Krafteinleitungspunkt 30 ist infolge einer Bewegung des Bedienelements 26 zumindest im Wesentlichen über eine Maximalerstreckung 44 der Kontaktfläche 32 entlang einer Geraden auf der Kontaktfläche 32 bewegbar, insbesondere bei einer Bewegung des Bedienelements 26 ausgehend von der Kontaktposition des Bedienelements 26 in die Endposition des Bedienelements 26. Das Bedienelement 26 ist schwenkbar gelagert und weist einen minimalen Leerhubwinkel 46 von mehr als 5° auf. Vorzugsweise weist das Bedienelement 26 einen maximalen Leerhubwinkel 46 von weniger als 20°, insbesondere von 18°, auf. Der maximale Leerhubwinkel 46 ist ein Winkel, um den das Bedienelement 26 bei einer Schwenkbewegung des Bedienelements 26 ausgehend von der Ruheposition (Figuren 2 und 5) in die Kontaktposition (Figur 3) bewegbar ist. Das Bedienelement 26 weist zumindest eine Anschlagfläche 48 auf, die eine maximale Bewegung, insbesondere einen maximalen Hubwinkel, des Bedienelements 26 begrenzt und angrenzend an die Betätigungsfläche 28 am Bedienelement 26 angeordnet ist. Die Anschlagfläche 48 ist vorzugsweise dazu vorgesehen, in der Endposition des Bedienelements 26 am Getriebegehäuse 54 anzuliegen, um eine maximale Bewegung, insbesondere einen maximalen Hubwinkel, des Bedienelements 26 zu begrenzen. Das Bedienelement 26 weist die Bewegungsachse 36, insbesondere eine Schwenkachse, und zumindest zwei Bedienflächen 50, 52 auf, die entlang einer zumindest im Wesentlichen senkrecht zur Bewegungsachse 36 des Bedienelements 26 verlaufenden Richtung an sich abgewandten Seiten des Bedienelements 26 angeordnet sind. Eine der zumindest zwei Bedienflächen 50, 52 ist zu einer Einwirkung einer Bedienerkraft zu einer Bewegung des Bedienelements 26 ausgehend von der Ruheposition (Figuren 2 und 5) in die Kontaktposition (Figur 3) vorgesehen, insbesondere infolge einer Einwirkung einer Druckkraft eines Bedieners auf die eine der zumindest zwei Bedienflächen 50, 52. Eine der zumindest zwei Bedienflächen 50, 52 ist zu einer Einwirkung einer Bedienerkraft zu einer Bewegung des Bedienelements 26 ausgehend von der Kontaktposition (Figur 3) in die Endposition (Figur 4) vorgesehen, insbesondere infolge einer Einwirkung einer Zugkraft eines Bedieners auf die eine der zumindest zwei Bedienflächen 50, 52.The force application point 30 is movable as a result of a movement of the operating element 26 along a straight line on the contact surface 32, in particular when the operating element 26 moves from the contact position of the operating element 26 into the end position of the operating element 26. The force application point 30 is as a result of a movement of the operating element 26 movable at least essentially over a maximum extension 44 of the contact surface 32 along a straight line on the contact surface 32, in particular when the operating element 26 moves starting from the contact position of the operating element 26 into the end position of the operating element 26. The operating element 26 is pivotably mounted and has a minimum idle stroke angle 46 of more than 5°. The operating element 26 preferably has a maximum idle stroke angle 46 of less than 20°, in particular 18°. The maximum idle stroke angle 46 is an angle through which the operating element 26 rotates when the operating element 26 pivots from the rest position ( figures 2 and 5 ) to the contact position ( figure 3 ) is movable. The operating element 26 has at least one stop surface 48 which limits a maximum movement, in particular a maximum lifting angle, of the operating element 26 and is arranged adjacent to the actuating surface 28 on the operating element 26 . The stop surface 48 is preferably provided to bear against the transmission housing 54 in the end position of the operating element 26 in order to limit a maximum movement, in particular a maximum stroke angle, of the operating element 26 . Operating element 26 has movement axis 36, in particular a pivot axis, and at least two operating surfaces 50, 52, which are arranged on opposite sides of operating element 26 along a direction running at least substantially perpendicularly to movement axis 36 of operating element 26. One of the at least two control surfaces 50, 52 is to an action of an operator force to a movement of the control element 26 starting from the rest position ( figures 2 and 5 ) to the contact position ( figure 3 ) provided, in particular as a result of the action of a pressure force from an operator on one of the at least two control surfaces 50, 52. One of the at least two control surfaces 50, 52 is subject to the action of an operator force to move the control element 26 starting from the contact position ( figure 3 ) to the final position ( figure 4 ) provided, in particular as a result of an operator exerting a tensile force on one of the at least two operating surfaces 50, 52.

Die Bedieneinheit 24 umfasst zumindest ein Federelement 80, das das Bedienelement 26 mit einer Federkraft in Richtung der Ruheposition (Figuren 2 und 5) des Bedienelements 26 beaufschlagt (Figuren 5 und 6). Das Federelement 80 ist vorzugsweise als Torsionsfeder, insbesondere als Schenkelfeder, ausgebildet. Das Federelement 80 stützt sich mit einem Ende am Bedienelement 26 ab und mit einem weiteren Ende stützt sich das Federelement 80 am Getriebegehäuse 54 ab (Figur 6). Das Federelement 80 ist dazu vorgesehen, das Bedienelement 26 mit einer Federkraft um die Bewegungsachse 36 des Bedienelements 26 zu beaufschlagen. Das Federelement 80 ist vorzugsweise in einem Bereich einer Lagerausnehmung 82 des Bedienelements 26 angeordnet. Das Federelement 80 ist dazu vorgesehen, den Exzenterabschnitt 72 des Bedienelements 26 an einem Grundkörper 84 des Bedienelements 26 bei einer Montage des Bedienelements 26 vorzufixieren. In einem am Getriebegehäuse 54 angeordneten Zustand des Bedienelements 26 und des Federelements 80 ist das Federelement zu einer Rückstellung des Bedienelements 26 in die Ruheposition und/oder zu einem Halten des Bedienelements 26 in der Ruheposition vorgesehen. Der Grundkörper 84 ist vorzugsweise aus einem Kunststoff oder aus einem Elastomer gebildet. Der Exzenterabschnitt 72 ist vorzugsweise aus einem metallischen Werkstoff gebildet. Die Bedienflächen 50, 52 sind am Grundkörper 84 angeordnet. Zudem liegt der Grundkörper 84 in der Ruheposition (Figuren 2 und 5) an dem Getriebegehäuse 54 an. Es kann vorteilhaft während eines Betriebs der tragbaren Werkzeugmaschine 14 eine Dämpfung gegen Schwingungen des Bedienelements 26 ermöglicht werden.The operating unit 24 includes at least one spring element 80, which the operating element 26 with a spring force in the direction of the rest position ( figures 2 and 5 ) of the operating element 26 is applied ( Figures 5 and 6 ). The spring element 80 is preferably designed as a torsion spring, in particular as a torsion spring. One end of the spring element 80 is supported on the operating element 26 and another end of the spring element 80 is supported on the transmission housing 54 ( figure 6 ). The spring element 80 is provided to close the operating element 26 with a spring force about the movement axis 36 of the operating element 26 pressurize The spring element 80 is preferably arranged in an area of a bearing recess 82 of the operating element 26 . The spring element 80 is intended to prefix the eccentric section 72 of the operating element 26 to a base body 84 of the operating element 26 when the operating element 26 is installed. When the operating element 26 and the spring element 80 are arranged on the transmission housing 54, the spring element is provided to return the operating element 26 to the rest position and/or to hold the operating element 26 in the rest position. The base body 84 is preferably formed from a plastic or from an elastomer. The eccentric section 72 is preferably formed from a metallic material. The operating surfaces 50, 52 are arranged on the base body 84. In addition, the base body 84 is in the rest position ( figures 2 and 5 ) to the transmission housing 54. Damping against vibrations of the operating element 26 can advantageously be made possible during operation of the portable machine tool 14 .

Figur 7 zeigt ein Kraftdiagramm einer Bedienelementkraft des Bedienelements 26 im Vergleich zu einer Federkraft des Spannfederelements 102 während einer Bewegung des Bedienelements 26 um die Bewegungsachse 36 des Bedienelements 26. Das Kraftdiagramm ist als Kraft-Weg(Winkel)-Diagramm ausgebildet, bei dem eine Kraft über einen Weg aufgetragen ist. Ein oberer Graph 88 des Kraftdiagramms zeigt einen Verlauf einer Bedienelementkraft des Bedienelements 26 bei einer Bewegung von der Ruheposition (Figuren 2 und 5) in die Endposition (Figur 4). Ein mittlerer Graph 90 zeigt einen Verlauf einer Bedienelementkraft des Bedienelements 26 bei einer Bewegung von der Endposition (Figur 4) in die Ruheposition (Figuren 2 und 5). Ein unterer Graph 92 zeigt einen Federkraftverlauf des Spannfederelements 102 in Abhängigkeit von der Bewegung des Bedienelements 26. figure 7 shows a force diagram of a control element force of the control element 26 compared to a spring force of the tension spring element 102 during a movement of the control element 26 about the movement axis 36 of the control element 26. The force diagram is designed as a force-displacement (angle) diagram in which a force over a way is applied. An upper graph 88 of the force diagram shows a course of a control element force of the control element 26 during a movement from the rest position ( figures 2 and 5 ) to the final position ( figure 4 ). A middle graph 90 shows a course of a control element force of the control element 26 during a movement from the end position ( figure 4 ) to the rest position ( figures 2 and 5 ). A lower graph 92 shows a spring force profile of tension spring element 102 as a function of the movement of operating element 26.

Claims (9)

  1. Quick-action clamping device for a portable power tool, in particular angle grinder, which has at least one output shaft (12) which can be driven in rotation, having at least one clamping unit (16) which, for tool-free fixing of an insert tool unit (18) to the output shaft (12), has at least one movably mounted clamping element (20, 22) for exertion of a clamping force on the insert tool unit (18) in a clamping position of the clamping element (20, 22), and having at least one operator control unit (24) at least for moving the clamping element (20, 22) into a release position, which operator control unit has at least one movably mounted operator control element (26), in particular a movably mounted operator control lever, wherein, for a movement of the clamping element (20, 22) into the release position, the operator control element (26) has at least one actuating surface (28) which is arranged in such a way that at least one force introduction point (30) of the operator control element (26) during an interaction with a contact surface (32) of a movably mounted actuating element (34) of the operator control unit (24) is movable on the contact surface (32) in a manner dependent on a movement of the operator control element (26), characterized in that the operator control element (26) has a movement axis (36), in particular a pivot axis, and has at least two operator control surfaces (50, 52) which are arranged on mutually averted sides of the operator control element (26) along a direction extending at least substantially perpendicularly to the movement axis (36) of the operator control element (26), and at least one of the at least two operator control surfaces (50, 52) is provided for causing a movement of the operator control element (26) from the rest position into the contact position, in particular owing to a pressure force being exerted by a user on the at least one of the at least two operator control surfaces (50, 52) .
  2. Quick-action clamping device according to Claim 1, characterized in that the operator control element (26) has a movement axis (36), in particular a pivot axis, which is arranged so as to be offset, in particular skewed, relative to a movement axis (38) of the actuating element (34).
  3. Quick-action clamping device according to either of the preceding claims, characterized in that the operator control element (26) has a movement axis (36), in particular a pivot axis, wherein a straight line (40) extending through the movement axis (36) of the operator control element (26) and the force introduction point (30) includes, in a plane extending at least substantially perpendicularly to the movement axis (36) of the operator control element (26), an angle (42) in an angle range from 35° to 85° with the contact surface (32) of the actuating element (34) in a manner dependent on an actuation position of the operator control element (26) .
  4. Quick-action clamping device according to one of the preceding claims, characterized in that the force introduction point (30) is movable along a straight line on the contact surface (32) owing to a movement of the operator control element (26).
  5. Quick-action clamping device according to Claim 4, characterized in that the force introduction point (30) is movable along a straight line on the contact surface (32) at least substantially over a maximum extent (44) of the contact surface (32) owing to a movement of the operator control element (26).
  6. Quick-action clamping device according to one of the preceding claims, characterized in that the operator control element (26) is mounted in a pivotable manner and has a minimum idle travel angle (46) of greater than 5°.
  7. Quick-action clamping device according to one of the preceding claims, characterized in that the operator control element (26) has at least one stop surface (48) which limits a maximum movement, in particular a maximum travel angle, of the operator control element (26) and is arranged adjacent to the actuating surface (28) on the operator control element (26).
  8. Portable power tool, in particular angle grinder, having a quick-action clamping device according to one of the preceding claims.
  9. Portable power tool according to Claim 8, characterized by at least one gearing housing (54) on which the operator control element (26) is movably mounted and is arranged in the vicinity of at least one ventilation opening (56) of the gearing housing (54), wherein the operator control element (26), at least in a non-actuated state, is arranged on the gearing housing (54) so as to at least substantially not overlap the ventilation opening.
EP17780078.6A 2016-10-18 2017-10-04 Quick clamping device for at least one rotationally drivable drive shaft having a portable machine tool, in particular an angle grinding machine Active EP3529004B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016220362.2A DE102016220362A1 (en) 2016-10-18 2016-10-18 Quick-clamping device for a portable power tool having at least one output shaft which can be driven in rotation, in particular an angle grinder
PCT/EP2017/075111 WO2018072996A1 (en) 2016-10-18 2017-10-04 Quick clamping device for at least one rotationally drivable drive shaft having a portable machine tool, in particular an angle grinding machine

Publications (2)

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EP3529004A1 EP3529004A1 (en) 2019-08-28
EP3529004B1 true EP3529004B1 (en) 2023-02-01

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US (1) US11607772B2 (en)
EP (1) EP3529004B1 (en)
JP (1) JP6802918B2 (en)
KR (1) KR102431897B1 (en)
CN (1) CN109843506B (en)
DE (1) DE102016220362A1 (en)
WO (1) WO2018072996A1 (en)

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DE102017218622A1 (en) * 2017-04-12 2018-10-18 Robert Bosch Gmbh Abrasive device, in particular grinding plate device or support plate device
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CN109843506A (en) 2019-06-04
KR20190071710A (en) 2019-06-24
JP6802918B2 (en) 2020-12-23
CN109843506B (en) 2022-01-11
DE102016220362A1 (en) 2018-04-19
US20190262970A1 (en) 2019-08-29
US11607772B2 (en) 2023-03-21
WO2018072996A1 (en) 2018-04-26

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