EP3815843B1 - Spannvorrichtung zum einspannen eines werkstücks - Google Patents

Spannvorrichtung zum einspannen eines werkstücks Download PDF

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Publication number
EP3815843B1
EP3815843B1 EP20205156.1A EP20205156A EP3815843B1 EP 3815843 B1 EP3815843 B1 EP 3815843B1 EP 20205156 A EP20205156 A EP 20205156A EP 3815843 B1 EP3815843 B1 EP 3815843B1
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EP
European Patent Office
Prior art keywords
clamping
clamping device
arm
housing
latching
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
EP20205156.1A
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German (de)
English (en)
French (fr)
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EP3815843A1 (de
Inventor
Peter Steinbach
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.)
Andreas Maier GmbH and Co KG
Original Assignee
Andreas Maier GmbH and Co KG
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Publication date
Application filed by Andreas Maier GmbH and Co KG filed Critical Andreas Maier GmbH and Co KG
Publication of EP3815843A1 publication Critical patent/EP3815843A1/de
Application granted granted Critical
Publication of EP3815843B1 publication Critical patent/EP3815843B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/10—Arrangements for positively actuating jaws using screws
    • B25B5/104—Arrangements for positively actuating jaws using screws with one screw and one clamping lever and one fulcrum element
    • B25B5/108—Arrangements for positively actuating jaws using screws with one screw and one clamping lever and one fulcrum element the screw contacting one of the ends of the lever
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00—Vices
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/10—Arrangements for positively actuating jaws using screws
    • B25B1/12—Arrangements for positively actuating jaws using screws with provision for disengagement
    • B25B1/125—Arrangements for positively actuating jaws using screws with provision for disengagement with one screw perpendicular to the jaw faces

Definitions

  • the present invention relates to a clamping device for clamping a workpiece, the clamping device comprising a housing, a clamping arm held pivotably on the housing, and a clamping screw which is rotatably mounted about a longitudinal axis of the clamping screw, the clamping screw having a thread and the clamping arm having a Has engagement portion which is in a working state of the clamping device in engagement with the thread of the clamping screw.
  • the clamping arm is moved from a first working position into a second working position by rotating the clamping screw about its longitudinal axis. This rotation of the tensioning screw causes the tensioning arm to pivot due to the engagement of the threading of the tensioning screw with the engagement portion of the tensioning arm.
  • the CH 658 620 A5 discloses a clamping device for clamping a workpiece, which comprises a housing, a clamping arm that is held on the housing in a linearly displaceable manner, and a clamping screw that is rotatably mounted about a longitudinal axis of the clamping screw, the clamping screw having a thread and the clamping arm having an engagement section that is in a working state of the clamping device in engagement with the thread of the clamping screw, wherein the clamping device comprises a decoupling device, by means of which the thread of the clamping screw can be disengaged from the engagement section of the clamping arm, so that the clamping arm can be displaced between a first working position and a second working position independently of a rotation of the clamping screw relative to the housing of the clamping device.
  • the U.S. 4,500,081A discloses a clamping device for clamping a workpiece according to the preamble of claim 1.
  • the object of the present invention is to create a clamping device of the type mentioned above, in which the clamping arm can be moved as quickly as possible from a first working position relative to the housing of the clamping device into a second working position relative to the housing of the clamping device.
  • clamping device having the features of the preamble of claim 1 in that the clamping device comprises a decoupling device, by means of which the thread of the clamping screw disengages from the engagement section of the clamping arm can be brought, so that the clamping arm can be pivoted relative to the housing of the clamping device between a first working position and a second working position, independently of a rotation of the clamping screw.
  • the clamping device comprises a decoupling device, by means of which the thread of the clamping screw disengages from the Engaging portion of the clamping arm can be brought, so that the clamping arm is pivotable relative to the housing of the clamping device between a first working position and a second working position independently of a rotation of the clamping screw.
  • Such a decoupling device can in particular comprise a guide element which accommodates a guide section of the clamping screw and is movable, in particular displaceable, between an engaged position in which the clamping screw is in engagement with the clamping arm and a release position in which the clamping screw is disengaged from the clamping arm , is.
  • the decoupling device can in particular comprise a prestressing device which prestresses the guide element into the engaged position.
  • the decoupling device can comprise a latching device, by means of which the guide element can be latched in the engaged position and/or in the release position—preferably on the housing of the tensioning device.
  • the latching device can comprise at least one latching part that between a latching position, in which the latching part locks the guide element in the engaged position and/or in the release position, and an unlocking position, in which the locking part releases a movement of the guide element from the engaged position to the release position and/or from the release position to the engaged position.
  • the latching device can comprise a spring element which prestresses the at least one latching part into the latched position.
  • the latching device comprises two latching parts which protrude from the housing of the tensioning device in opposite directions.
  • the latching part or at least one of the latching parts can be provided with an actuating element which can be gripped by an operator in order to move the latching part into the unlatched position.
  • the latching part or at least one of the latching parts is preferably slidably guided in a guide channel of the guide element.
  • the tightening screw preferably comprises an actuating end part which can be engaged by a screwing tool in order to rotate the tightening screw about its longitudinal axis.
  • the actuating end part can in particular be designed as a clamping screw head.
  • the actuating end part can have a polygonal cross section, in particular a hexagonal cross section, taken perpendicular to the longitudinal axis of the clamping screw.
  • the actuating end part is provided with a recess with a polygonal cross section, in particular with a hexagonal cross section.
  • the clamping screw can have a bearing end part, by means of which the clamping screw is pivotably mounted relative to the housing—preferably on the housing.
  • the bearing end part can have a bearing section which is designed spherically in sections and which is arranged on a bearing receptacle of the housing of the tensioning device which is designed in a complementary manner thereto in sections.
  • the tensioning arm is preferably pivotable through an angle of at least 30°, in particular at least 45°, particularly preferably at least 60°, relative to the housing of the tensioning device when the thread of the tensioning screw is disengaged from the engagement portion of the tensioning arm.
  • the clamping device can comprise at least one chip protection element, which at least partially covers a gap between two opposite inner walls of the housing of the clamping device.
  • the clamping device can comprise an upper chip protection element, which is arranged on a side of the clamping arm that faces away from the bearing surface of the clamping device, and/or a lower chip protection element, which is arranged on a side of the clamping arm that faces the bearing surface of the clamping device.
  • At least one Chip protection element has an edge portion which rests against the clamping arm or is spaced apart from the clamping arm by less than 2 mm, in particular by less than 1 mm.
  • the clamping device also includes a fastening means for fastening the clamping device to a substrate and a fastening means receptacle in which the fastening means can be accommodated.
  • the clamping arm has at least one recess which is formed and arranged on the clamping arm in such a way that an actuating tool acting on the fastening means for actuating the fastening means in at least one working position of the clamping arm relative to the housing can extend through the recess to the fastening means, and or the tensioning arm has at least one bend, which is designed and arranged on the tensioning arm in such a way that an actuating tool acting on the fastening means for actuating the fastening means can, in at least one working position of the tensioning arm relative to the housing, move laterally past the bent area of the tensioning arm to the Fasteners can extend.
  • the fastening means is arranged in the fastening means receptacle of the clamping device when the actuating tool acts on the fastening means and extends through the recess of the clamping arm or laterally past the bent area of the clamping arm to the fastening means.
  • the clamping arm can be pivoted between a first working position and a second working position relative to the housing and the recess or the offset is designed in such a way that the actuating tool can be moved both in the first working position and in the second Working position can extend through the recess or laterally past the bent area of the clamping arm up to the fastening means.
  • the clamping arm In the second working position, the clamping arm is pivoted by an angle of preferably at least 30°, in particular at least 40°, particularly preferably at least 60°, relative to the first working position relative to the housing of the clamping device.
  • the recess or the offset is designed in such a way that the actuating tool moves in any position of the clamping arm between the first working position and the second working position relative to the housing through the recess or laterally past the bent area of the clamping arm can extend up to the fastener.
  • the at least one recess can in particular be designed as a passage opening in the clamping arm.
  • Such a passage opening preferably extends through the tensioning arm from an upper side of the tensioning arm facing away from the fastening means receptacle to an underside of the tensioning arm facing the fastening means receptacle.
  • the recess can in particular be designed as an elongated hole in order to make it possible for the actuating tool to be able to extend in a large number of working positions through the recess designed as an elongated hole to the fastening means.
  • the clamping arm has at least a first recess and a second recess and can be pivoted between a first working position and a second working position relative to the housing, with the first recess being designed in such a way that the actuating tool in the first working position can extend through the first recess to the fastening means and the second recess is designed such that the operating tool can extend through the second recess to the fastening means in the second working position.
  • the clamping arm has more than two recesses through which the actuating tool can extend to the fastening means when the clamping arm is in different working positions.
  • At least two of the recesses in the tensioning arm can be designed in such a way that they open out at a common opening on the underside of the tensioning arm facing the fastener receptacle.
  • the clamping device comprises at least one working position scale, which is arranged on the housing or on a component of the clamping device connected in a rotationally fixed manner to the housing, and one Includes index marking, which is arranged on the tensioning arm or on a non-rotatably connected to the tensioning arm component of the tensioning device, wherein a predetermined positioning of the index mark relative to the working position scale is associated with a plurality of working positions of the clamping arm relative to the housing.
  • the working position scale comprises a plurality of working position markings, to which different working positions of the tensioning arm relative to the housing are assigned.
  • the clamping arm is provided with a pressure piece and the height H of the pressure piece in relation to a bearing surface of the housing of the clamping device, which the pressure piece occupies in the various working positions to which the working position markings are assigned, form an essentially equidistant sequence.
  • One of the working position markings of the working position scale can be an upper end position marking, which is assigned to the working position in which the height H o of the pressure piece in relation to the bearing surface of the housing is at its maximum.
  • one of the working position markings can be a lower end position marking, which is associated with the working position in which the height H u of the pressure piece in relation to the bearing surface of the housing is minimal.
  • At least one working position scale is preferably provided on two different sides of the housing of the clamping device, so that the positioning of the clamping arm relative to the housing of the clamping device can be easily read from two opposite sides of the clamping device.
  • At least one of the working position scales is arranged on an outer edge of the housing.
  • At least one of the working position scales is arranged on an inner edge of the housing, which is opposite an edge of a bearing section of the clamping arm.
  • the tensioning arm is preferably mounted on a boundary wall of the housing of the tensioning device so that it can pivot about a pivot axis of the tensioning arm.
  • the tensioning arm is preferably provided with a pressure piece which comprises a pressure piece base body and a pressure piece insert which is detachably connected to the pressure piece base body.
  • the base body of the pressure piece is preferably held captively on the clamping arm.
  • the pressure piece insert is preferably connected to the pressure piece base body so that it can be exchanged for another pressure piece insert.
  • the pressure piece insert can have a substantially flat clamping surface with which the pressure piece can be placed on a workpiece to be clamped.
  • the pressure piece insert can comprise a clamping surface which is provided with one or more grooves in order to produce a corrugation or profiling of the clamping surface.
  • the pressure piece insert has a recess with which the workpiece can engage when the workpiece is clamped.
  • Such a recess can extend, for example, in a longitudinal direction or in a transverse direction of the clamping device.
  • the recess can have a cross section--taken perpendicular to its longitudinal direction--which is preferably triangular or trapezoidal.
  • the pressure piece insert is releasably connected to the pressure piece base body by means of a magnetic element.
  • the magnetic element preferably comprises a permanent magnet.
  • the magnetic element can be arranged on the base body of the pressure piece or on the pressure piece insert.
  • the base body of the pressure piece is preferably provided with a projection, the underside of which, which faces away from a pivot axis of the pressure piece of the clamping device, can serve as a clamping surface for a workpiece to be clamped by means of the clamping device if no pressure piece insert is arranged on the base body of the pressure piece.
  • the pressure piece insert can have a recess in which the projection of the pressure piece base body engages when the pressure piece insert is arranged on the pressure piece base body.
  • the recess is preferably designed to be complementary to the projection, so that the projection and the recess together form a form fit which prevents the pressure piece insert from being displaced relative to the pressure piece base body in a direction parallel to the underside of the pressure piece base body.
  • the clamping device according to the invention is particularly suitable for use in a combination of a clamping device according to the invention and an actuating tool for actuating a fastening means for fastening the clamping device to a substrate.
  • the actuating tool can have a substantially straight tool section which extends from the recess or from the bent area of the clamping arm to the fastening means when the actuating tool is used to actuate the fastening means.
  • the actuating tool is designed as an Allen key.
  • the fastening means preferably comprises a hexagon socket screw.
  • the clamping device 100 shown is used to clamp a workpiece 102 on a clamping surface 104, which can be configured, for example, coplanar with a bearing surface 106 of a housing 108 of the clamping device 100, but can also be offset upwards or downwards relative to this bearing surface 106 and/or inclined relative to the bearing surface 106 can be.
  • housing 108 is preferably formed in two parts and comprises a first housing part 110a and a second housing part 110b, which preferably abut one another in a contact plane 112, which is parallel to a longitudinal direction 114 of clamping device 100 and perpendicular to a transverse direction 116 of clamping device 100 is aligned.
  • the longitudinal direction 114 and/or the transverse direction 116 are preferably aligned parallel to the bearing surface 106 of the housing 108 .
  • a vertical direction 118 of the clamping device 100 is aligned perpendicularly to the longitudinal direction 114 and perpendicularly to the transverse direction 116 and thus also perpendicularly to the bearing surface 106 of the housing 108 of the clamping device 100 .
  • the two housing parts 110a and 110b are fixed to one another—preferably releasably—by means of one or more, for example three, fastening elements 120.
  • Fastening elements 120 can each be embodied, for example, as a screw which passes through a passage opening in one housing part, for example in the second housing part 110b, and with its thread (not shown) into a complementary internal thread on the other housing part, for example on the first Housing part 110a is screwed.
  • the front edge 122 of the housing 108 is provided with a—for example essentially U-shaped—fastening means receptacle 124 which is used to receive a fastening means for fastening the tensioning device 100 to a substrate 126 .
  • Such a fastening means 128 can, for example, comprise a fastening screw 130 and a T-slot piece 132, the fastening screw 130 being screwed with its external thread into a complementary internal thread of the T-slot piece 132 (see Figures Figures 17 to 22 ).
  • the base 126 to which the clamping device can be fastened by means of fastening means 128, can be embodied, for example, as a machine table, as a workpiece pallet, or as a base element, on which the clamping device 100 is placed in order to separate the bearing surface 106 by the height of the base element from the Clamping surface 104 to be spaced.
  • the clamping device 100 further comprises a clamping arm 136 which is held on the housing 108 so as to be pivotable about a pivot axis 134.
  • the pivot axis 134 of the tensioning arm 136 is aligned parallel to the transverse direction 116 of the tensioning device 100 .
  • the clamping arm 136 comprises a clamping section 138 which extends through an outlet opening 140 bordered by the housing parts 110a and 110b on the front side of the housing 108 into an outer space 142 of the housing 108 .
  • a pressure piece 146 is arranged on a free end region 144 of the clamping arm 136 facing away from the pivot axis 134 and serves to transmit a clamping force from the clamping device to the workpiece 102 to be clamped in each case.
  • the pressure piece 146 is preferably articulated on the tensioning arm 136 such that it can pivot about a pressure-piece pivot axis 148 relative to the free end region 144 of the tensioning arm 136 .
  • the pressure piece 146 can be formed in one piece.
  • the pressure piece 146 preferably comprises a pressure piece body 150 which is connected to the tensioning arm 136, and a pressure piece insert 152 which is detachably connected to the pressure piece body 150 (see FIG 1 ).
  • the pressure piece insert 152 is preferably connected to the pressure piece base body 150 by a form fit.
  • the pressure piece insert 152 is detachably fixed to the pressure piece base body 150 by means of a tongue and groove connection.
  • the detachable connection between the pressure-piece insert 152 and the pressure-piece base body 150 makes it possible to replace the pressure-piece insert 152 with another pressure-piece insert of a different design.
  • the pressure piece insert 152' is detachably connected to the pressure piece base body 150 by means of a magnetic element 310 .
  • the pressure piece base body 150 preferably has a projection 312 on its underside facing away from the pressure piece pivot axis 148, the underside 314 of which can serve as a clamping surface 290 for clamping a workpiece 102 by means of the clamping device 100 if no pressure piece insert 152' is attached the pressure piece base body 150 is arranged.
  • the clamping surface 290 can be essentially planar and can rest against the workpiece 102 when the clamping device 100 is used to clamp a workpiece 102 .
  • the pressure-piece insert 152′ preferably has a recess 316 into which the projection 312 of the pressure-piece base body 150 engages when the pressure-piece insert 152′ is arranged on the pressure-piece base body 150 .
  • the recess 316 is preferably designed to complement the projection 312, so that the pressure-piece insert 152' is secured against displacement relative to the pressure-piece base body 150 in directions aligned parallel to the underside 314 of the projection 312 when the pressure-piece insert 152 'is arranged on the pressure piece base body 150.
  • the magnetic element 310 which creates a non-positive connection between the pressure-piece insert 152' and the pressure-piece base body 150, is arranged on the pressure-piece insert 152' in the embodiment illustrated in the drawing.
  • the magnetic element 310 is arranged on the pressure piece base body 150; in this case it is not necessary to also provide the pressure piece inserts 152' with a magnetic element 310.
  • the first pressure piece insert 152b' is provided with one or more grooves 292 on the clamping surface 290 facing away from the pressure piece base body 150 when the pressure piece insert 152b' is in the installed state, through which the clamping surface 290 is profiled, so that the pressure piece insert 152b 'Can dig into the workpiece 102 to be clamped with its clamping surface 290 in order to increase the adhesion between the pressure piece 146 and the workpiece 102 to be clamped.
  • the grooves 292 can run parallel to the transverse direction 116 of the clamping device 100 (and thus parallel to the pressure piece pivot axis 148) or parallel to the longitudinal direction 114 of the clamping device 100 or run in any other direction.
  • a recess 294 is provided on the clamping surface 290 that faces away from the pressure-piece base body 150 when the pressure-piece insert 152c' is in the installed state has triangular cross section.
  • the clamping surface 290 which faces away from the pressure piece base body 150 when the pressure piece insert 152d' is in the installed state is provided with a recess 294' which extends parallel to the longitudinal direction 114 of the clamping device 100 and perpendicular to this direction preferably has a trapezoidal or triangular cross-section.
  • the recess 294 or 294′ of the second pressure-piece insert 152c′ or the fourth pressure-piece insert 152d′ makes it possible to achieve particularly good force transmission from the pressure piece 146 to a workpiece 102 which has an at least partially complementary shape to the respective recess 294 or 294′ having trained workpiece section.
  • the clamp 100 includes a work position scale 154 disposed on the housing 108 of the clamp 100 and an index mark 156 cooperating with the work position scale 154 disposed on the clamp arm 136 .
  • Index mark 156 preferably extends in a direction radial to pivot axis 134 of tensioner arm 136 .
  • the index mark 156 can be formed, for example, as an indentation or as an elevation on the clamping arm 136 .
  • the index marking 156 can stand out in terms of its color and/or its brightness from the region of the clamping arm 136 surrounding it.
  • the working position scale 154 preferably includes a plurality of working position markings 158 which are associated with different working positions of the clamping arm 136 relative to the housing 108 of the clamping device 100, the clamping arm 136 being rotated at different angles relative to the housing 108 about the pivot axis 134 in these different working positions.
  • the working position scale 154 comprises, for example, five such working position markings 158; alternatively, however, it can also be provided that the working position scale 154 comprises only one, two, three, four or more than five working position markings 158 .
  • the working position markings 158 preferably extend in a direction directed radially to the pivot axis 134 .
  • the working position markings 158 can be designed in particular as elevations or recesses on the housing 108 .
  • the working position markings 158 can stand out from the area of the housing 108 adjoining the working position markings 158 by their color and/or by their brightness.
  • two working position scales 154 are provided, one of the working position scales 154 being arranged on the first housing part 110a and a second working position scale 154 being arranged on the second housing part 110b.
  • index markings 156 are also provided on the tensioning arm 136, with a first index marking 156a being arranged on the side of the tensioning arm 136 facing the first working position scale 154a and the second index marking being arranged on the side of the tensioning arm 136 facing the second working position scale 154.
  • a working position scale 154 cooperating with an index mark 156 of the clamping arm 136 is present on each side of the clamping arm 136, the respective working position of the clamping arm 136 can be read easily and reliably from both sides of the clamping device 100.
  • One of the working position markings 158 on the working position scale 154 is preferably an upper end position marking 160a, which is assigned to the working position of the clamping arm 136 in which the height H o of the pressure piece pivot axis 148 in relation to the bearing surface 106 of the housing 108 of the clamping device 100 is at its maximum.
  • one of the working position markings 158 of the working position scale 154 is preferably a lower end position marking 160b, which is assigned to the working position of the clamping arm 136 in which the height H u of the pressure piece pivot axis 148 in relation to the bearing surface 106 of the housing 108 is minimal.
  • the intermediate position markings 162a, 162b and 162c of the working position scale 154 lying between the upper end position marking 160a and the lower end position marking 160b are preferably arranged on the housing 108 in such a way that the heights H 1 , H 2 , H 3 and H u of the pressure piece pivot axis 148 in With respect to the bearing surface 106 of the housing 108 of the clamping device 100, which supports the pressure piece pivot axis 148 in the various intermediate positions of the clamping arm 136, to which the intermediate position markings 162a, 162b and 162c are assigned, or in the lower end position of the clamping arm 136, which the lower end position marking 160b is assigned, each form a substantially equidistant sequence.
  • the intermediate position markings 162a, 162b and 162c are therefore preferably arranged relative to the upper end position marking 160a and the lower end position marking 160b that the height H 1 , which the pressure piece pivot axis 148 assumes in the first intermediate position associated with the first intermediate position marking 162a, is lower by ⁇ H is the height H o which the pressure piece pivot axis 148 assumes in the upper end position of the clamping arm 136 .
  • the height H 2 which the pressure piece pivot axis 148 assumes in the second intermediate position assigned to the second intermediate position marking 162b, is smaller by ⁇ H than the height H 1 .
  • the height H 3 which the pressure piece pivot axis 148 assumes in the third intermediate position associated with the third intermediate position marking 162c, is smaller by ⁇ H than the height H 2 .
  • the height H u which the pressure piece pivot axis 148 assumes in the lower end position, is smaller by ⁇ H than the height H 3 .
  • ⁇ H H O ⁇ H and / 4 .
  • the angle of rotation with respect to the pivot axis 134 of the clamping arm 136, by which the positions of directly consecutive working position markings 158 of the working position scale 154 differ from one another, is therefore not constant, but instead decreases from the upper end position marking 160a to the lower end position marking 160b.
  • the working position scale 154 is arranged on an outer edge 164 of the housing 108 of the clamping device, and the working position markings 158 are each designed as recesses, in particular as notches, on the relevant outer edge 164.
  • the tensioning device 100 comprises a movement device, designated as a whole by 166, which comprises a tensioning screw 168 which is rotatably mounted about a longitudinal axis 170 of the tensioning screw 168 (see FIG 7 ).
  • the clamping screw 168 has a thread 172 which is in the 7 shown working condition and in 16 illustrated working state of the clamping device 100 is in engagement with a toothed ring segment 174, which is formed on an engagement portion 176 of the clamping arm 136.
  • the engagement section 176 of the tensioning arm 136 is arranged on the side of the pivot axis 134 of the tensioning arm 136 facing away from the free end region 144 of the tensioning arm 136 .
  • the clamping screw 168 also includes a bearing end part 178 by means of which the clamping screw 168 is pivotably mounted relative to the housing 108 .
  • the bearing end part 178 is detachably fixed to an end region 184 of a shaft 186 of the clamping screw 168 by means of a fastening screw 182 .
  • the thread 172 of the clamping screw 168 is formed on the shank 186 of the clamping screw 168 .
  • An annular stop 187 is disposed between the threads 172 and the bearing end portion 178 which prevents the tensioning screw 168 from moving downwardly along its longitudinal axis 170 when it is not engaged with the engagement portion 176 of the tensioning arm 136 .
  • the bearing end part 178 comprises a bearing section 180 which has an outer contour which is designed to be spherical in sections.
  • the partially spherical bearing section 180 of the clamping screw 168 is arranged in a partially complementary bearing receptacle 188 of the housing 108 of the clamping device 100, so that the clamping screw 168 along the partially spherically formed contact surface between the bearing section 180 of the bearing end part 178 on the one hand and the bearing receptacle 188 on the other hand from the in 7 working position shown in 15 shown release position is pivotable.
  • the longitudinal axis 170 of the clamping screw 168 is preferably aligned essentially perpendicular to the bearing surface 106 of the housing 108 of the clamping device 100 .
  • An actuating end part 190 is formed on the end of clamping screw 168 facing away from bearing end part 178, which an operator can grip by hand or with a tool in order to rotate clamping screw 168 about its longitudinal axis 170 and thereby move clamping arm 136 into the desired working position move.
  • the actuating end part 190 can in particular be designed as a clamping screw head.
  • the actuating end part 190 preferably has a polygonal cross section, for example a hexagonal cross section, taken perpendicular to the longitudinal axis 170 of the clamping screw 168 .
  • a guide section 192 of the clamping screw 168 located between the actuating end part 190 and the thread 172 of the clamping screw 168 passes through a guide opening 194 in a guide element 196 of the clamping device 100.
  • the guide element 196 is guided on the housing 108 of the clamping device 100 so that it can be moved from one to the 7 and 15 illustrated engagement position, in which the clamping screw 168 is in engagement with the clamping arm 136, into an in 15 shown release position, in which the clamping screw 168 is disengaged from the tensioning arm 136, and from the release position back into the engaged position can be displaced.
  • the clamping device 100 further includes a biasing device 198, which the guide member 196 in the 7 and 16 engagement position shown biases.
  • the pretensioning device 198 can in particular comprise a pretensioning spring 200 which is fixed on the housing 108 of the tensioning device 100 at a housing-side end region 202 and on the guide element 196 at a guide-element-side end region 204 .
  • the guide element 196 and the pretensioning device 198 form components of a decoupling device 206 of the tensioning device 100, by means of which the thread 172 of the tensioning screw 168 can be disengaged from the engagement section 176 of the tensioning arm 136.
  • This decoupling device 206 also includes a latching device 208, by means of which the guide element 196 can be latched in the engaged position and in the released position relative to the housing 108.
  • the locking device 208 comprises two locking parts 210, which between a in the 8 and 14 shown latching position, in which the latching parts 210 lock the guide element 196 in the engaged position or in the release position and one in the 9 and 10 Unlocking position shown, in which the locking parts 210 a movement of the guide member 196 of the Release engaged position in the release position or from the release position to the engaged position, are movable.
  • latching parts 210 from the latched position to the unlatched position or from the unlatched position to the latched position preferably takes place along transverse direction 116 of clamping device 100.
  • Both latching parts 210 are preferably slidably guided in a guide channel 212 of the guide element 196 , the guide channel 212 preferably extending through the guide element 196 in the transverse direction 116 of the tensioning device 100 .
  • the latching device 208 also includes a spring element 214, which biases the two latching parts 210 into the latched position.
  • the spring element 214 can be designed as a helical spring, for example.
  • the end regions of the spring element 214 facing away from each other can each be accommodated in a spring element receptacle 216 of one of the latching parts 210 .
  • the two latching parts 210 protrude from the housing 108 of the clamping device 100 in opposite directions 218a and 218b, which are both aligned parallel to the transverse direction 116.
  • Each of the latching parts 210 is provided at its end facing away from the respective other latching part 210 with an actuating element 220 which an operator can grip in order to move the respective latching part 210 into the unlatched position.
  • an operator acts simultaneously on the actuating elements 220 of both latching parts 210 in order to move the latching parts 210 towards one another against the elastic restoring force of the spring element 214 into the unlatched position.
  • Each of the operating elements 220 can be designed as an operating button.
  • the procedure is as follows: Starting from the in the 7 and 8th illustrated working position of the clamping device 100, in which the engagement section 176 of the clamping arm 136 is in engagement with the thread 172 of the clamping screw 168 and the clamping arm 136 is, for example, in its upper end position, the guide element 196 is in the engaged position and the latching parts 210 of the latching device 208 are in the latched position, the latching parts 210 of the latching device 208 are pushed into the in 9 shown unlocking position transferred by an operator acts on the actuating elements 220 of the latching parts 210 and moves the same along the transverse direction 116 of the clamping device 100 towards each other.
  • the locking parts 210 cause a movement of the guide element 196 from the 9 shown engagement position in the 10 shown release position free.
  • the release position shown takes place in that the operator acting on the actuating elements 220 moves the latching parts 210 in the longitudinal direction 114 of the clamping device 100 from the front of the housing 108, at which the clamping arm 136 exits the housing 108, rearwardly, towards the rear of the housing 108, shifts.
  • the latching parts 210 are moved apart by the spring element 214 in the directions 218a, 218b, so that they are in the 13 and 14 take the latched position shown, in which the latching parts 210 lock the guide element 196 in the release position.
  • This quick adjustment of the clamping arm 136 saves a great deal of adjustment time, which would otherwise have to be spent moving the clamping arm 136 in the working position by rotating the clamping screw 168 about its longitudinal axis 170 from the first working position, for example the upper end position of the clamping arm 136, to the second Working position, such as the lower end position of the clamping arm 136 to move.
  • the guide element 196 is transferred from the release position back into the engaged position by an operator moving the latching parts 210 against the elastic restoring force of the spring element 214 from the latched position, in which the latching parts 210 arrest the guide element 196 in its released position, into the unlatched position, in which the latching portions 210 enable movement of the guide member 196 from the release position to the engaged position.
  • the guide element 196 freed from the locking position in the release position, is then moved by the pretensioning device 198, in particular the pretensioning spring 200, from the release position into the engaged position, in which the thread 172 of the clamping screw 168 is again engaged with the engagement section 176 of the clamping arm 136.
  • the latching parts 210 are moved by the spring element 214 along the directions 218a and 218b, respectively, from the unlatched position to the latched position, so that the guide element 196 is locked in the engaged position and secured against moving back into the release position.
  • the clamping arm 136 is in the desired second working position, for example in the lower end position of the clamping arm 136.
  • the clamping device 100 comprises an upper chip protection element 222 and a lower chip protection element 224, these chip protection elements 222, 224 each at least partially forming a gap between two opposite inner walls 226a, 226b of the housing 108 of the clamping device 100 cover so that an interior space 228 of the housing 108, in which the engagement section 176 of the clamping arm 136 and the thread 172 of the clamping screw 168 are arranged, is protected by the chip protection elements 222, 224 against the ingress of chips and/or other contaminants from the exterior space 142 of the Housing 108 is protected.
  • the upper chip protection element 222 is fixed to a top wall 230 of the housing 108 and extends both in the 7 illustrated upper end position of the clamping arm 136 as well as in 16 illustrated lower end position of the tensioning arm 136 up to an upper peripheral surface 232 of the tensioning arm 136 or at least up to the vicinity of this upper peripheral surface 232.
  • An edge section 234 of the upper chip protection element 222 facing the tensioning arm 136 preferably bears against the upper circumferential surface 232 of the tensioning arm 136 or is spaced from the upper circumferential surface 232 of the tensioning arm 136 by less than 2 mm, in particular by less than 1 mm.
  • the lower chip protection element 224 is fixed to a bottom wall 236 of the housing 108 and extends to a lower peripheral surface 238 of the tensioner arm 136 or at least to the vicinity of the lower peripheral surface 238.
  • An edge section 240 of the lower chip protection element 224 facing the clamping arm 136 preferably rests against the lower peripheral surface 238 of the clamping arm 136 or is spaced from the lower peripheral surface 238 of the clamping arm 136 by less than 2 mm, in particular by less than 1 mm.
  • Each of the chip protection elements 222, 224 can in particular be designed essentially in the form of a plate and/or essentially in the form of a sheet.
  • the free end portion 144 of the tension arm 136 has a longitudinal center plane 242 which extends through the longitudinal axis 170 of the tension screw 168, preferably independent of whether the tension screw 168 is in the engaged position or in the released position, and preferably independent of which working position the clamp arm 136 is in.
  • the tensioning arm 136 is provided with a bend 246, which is formed on the tensioning arm 136 in this way and it is arranged that a side wall 250 of the clamping arm 136 facing the fastener receptacle 124 is offset in the bent region 248 of the clamping arm 136 by the distance ⁇ along the transverse direction 116 of the clamping device 100 with respect to the same side wall 250 in the free end region 144 of the clamping arm 136, and namely from a lateral edge 252 of the fastener receptacle 124 away to an inner wall 226b of the housing 108 facing away from this lateral edge 252 of the fastener receptacle 124 .
  • the side wall 150 of the tensioning arm 136 in the free end region 144 of the tensioning arm 136 on the one hand and the lateral edge 252 of the fastener receptacle 124 on the other lie almost in the same plane running perpendicular to the transverse direction 116 of the tensioning device 100, and the offset ⁇ created by the bend 246 is almost the same size as the width of the fastener receptacle 124, i.e. its extent in the transverse direction 116, so that the bent region 248 of the tensioning arm 136 the fastener receptacle 124 - viewed from above along the height direction 118 of the tensioning device 100 - overlapped only to a small extent or not at all.
  • the actuating tool 244 it is therefore possible for the actuating tool 244 to extend laterally past the angled region 248 of the tensioning arm 136 to a fastener 128 of the tensioning device 100 accommodated in the fastener receptacle 124 when the tensioning arm 136 is in its upper end position, as is the case here in the Figures 17 to 19 is shown.
  • the actuating tool 244 can be embodied, for example, as an Allen key (Allen key) 254, which comprises a long, straight tool section 256, a short, straight tool section 258, and a curved tool section 260, which connects the short, straight tool section 258 and the long, straight tool section 256 to one another.
  • Allen key Allen key
  • the long, straight tool section 256 can extend laterally past the clamping arm 136 from the bent region 248 of the clamping arm 136 to the fastening means 128 accommodated in the fastening means receptacle 124, in particular up to a fastening screw 130 of the fastening means 128, when the clamp arm 136 is in its upper end position.
  • the offset 246 of the tensioning arm 136 is also designed and arranged on the tensioning arm 136 such that the actuating tool 244 acting on the fastener 128 arranged in the fastener receptacle 124 for actuating the fastener 128 is also then located laterally on the bent area 248 of the clamping arm 136 can extend past up to the fastening means 128 when the clamping arm 136 is in its lower end position.
  • the actuating tool 244 can be arranged on the clamping device 100 so that it is laterally on the bent area 248 of the clamping arm 136 extends past from above the tensioner arm 136 to the fastener 128 to engage and actuate the fastener 128 to secure the tensioner 100 to the substrate 126.
  • the offset 246 on the tensioning arm 136 is also configured such that a side wall 262 of the tensioning arm 136 facing away from the fastener receptacle 124 in the offset area 248 opposite the free end area 144 of the tensioning arm 136 along the transverse direction 116 of the tensioning device 100 from the lateral edge 252 of the fastener receptacle 124 is offset away towards an inner wall 226b of the housing 108 facing away from the lateral edge 252 of the fastener receptacle 124 by the distance ⁇ ′.
  • the tensioning arm 136 has in its free end region 144 and in the Bent area 248 the same width, that is, the same extent along the transverse direction 116 of the clamping device 100 on.
  • the clamping arm 136 has a smaller width in the offset area 248 than in the free end area 144.
  • the tensioning arm 136 has a greater width in the bent area 248 than in the free end area 144
  • Recording 124 recorded fasteners 128 extends, is preferably less than 10 °, in particular less than 5 °.
  • the T-slot piece 132 is pushed into the relevant T-slot, the clamping device 100 in this way arranged on the base 126 such that the fastener receptacle 124 is located above the T-slot piece 132 in the height direction 118 of the clamping device 100, and the fastening screw 130 is inserted into the fastener receptacle 124 such that its thread engages with the internal thread of the T -groove piece 132 comes.
  • the actuating tool 244 is then brought into engagement with the head of the fastening screw 130 in such a way that the long straight tool section 256 extends from the fastening screw 130 laterally past the bent area 248 of the tensioning arm 136 into the area above the tensioning arm 136, as is shown in FIG the Figures 17 to 22 is shown.
  • an anti-twist device 264 is provided on the underside of the housing 108, which is designed in particular as a recess can be designed with a non-rotationally symmetrical cross-section (see 4 ).
  • the anti-twist device 264 is designed, for example, as a substantially cuboid depression in the bottom wall 236 of the housing 108 .
  • the anti-rotation lock 264 can be brought into engagement with a positioning element designed to complement this, so that the engagement between the positioning element fixed to the base 126 and the anti-rotation lock 264 on the housing 108 of the clamping device 100 prevents the Housing 108 of the clamping device 100 is prevented relative to the substrate 126.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
EP20205156.1A 2019-11-04 2020-11-02 Spannvorrichtung zum einspannen eines werkstücks Active EP3815843B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019129678.1A DE102019129678A1 (de) 2019-11-04 2019-11-04 Spannvorrichtung zum Einspannen eines Werkstücks

Publications (2)

Publication Number Publication Date
EP3815843A1 EP3815843A1 (de) 2021-05-05
EP3815843B1 true EP3815843B1 (de) 2023-08-30

Family

ID=73043164

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EP (1) EP3815843B1 (es)
DE (1) DE102019129678A1 (es)
ES (1) ES2958939T3 (es)
PL (1) PL3815843T3 (es)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH658620A5 (en) * 1982-11-09 1986-11-28 Andreas Maier Gmbh & Co Quick-acting clamping device for workpieces
FR2538732A1 (fr) * 1983-01-05 1984-07-06 Carossino Freres Dispositif de bridage, notamment pour la fixation de pieces sur une machine-outil
DE8333539U1 (de) * 1983-11-23 1984-04-26 IROX-Werkzeug Wolfgang Laabs, 2105 Seevetal Schnellspannvorrichtung
DE3705269A1 (de) * 1986-02-20 1987-08-27 Carver & Co Eng Verstellbare klemmeinrichtung und deren zubehoerteile
GB8604212D0 (en) * 1986-02-20 1986-03-26 Carver & Co Eng Clamps
DE3834418A1 (de) * 1988-10-10 1990-04-12 Leitz Wild Gmbh Schraubengetriebe
FR2651706B1 (fr) * 1989-09-11 1991-11-29 Carossino Freres Element de pression pour bridage de pieces a usiner.
US7506562B2 (en) * 2003-04-23 2009-03-24 Randolph Tool Company, Inc. Ratchet assembly
JP4960030B2 (ja) * 2006-07-19 2012-06-27 株式会社マキタ 切断機のバイス機構
DE102014109150A1 (de) * 2014-06-30 2015-12-31 Rothenberger Ag Haltevorrichtung zum verdrehbaren Haltern eines zu bearbeitenden Rohres

Also Published As

Publication number Publication date
PL3815843T3 (pl) 2024-02-12
ES2958939T3 (es) 2024-02-16
DE102019129678A1 (de) 2021-05-06
EP3815843A1 (de) 2021-05-05

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