EP1221359B1 - Dispositif d'isolation de vibrations - Google Patents

Dispositif d'isolation de vibrations Download PDF

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Publication number
EP1221359B1
EP1221359B1 EP20010130569 EP01130569A EP1221359B1 EP 1221359 B1 EP1221359 B1 EP 1221359B1 EP 20010130569 EP20010130569 EP 20010130569 EP 01130569 A EP01130569 A EP 01130569A EP 1221359 B1 EP1221359 B1 EP 1221359B1
Authority
EP
European Patent Office
Prior art keywords
actuator
force
handle
vibration
operating force
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.)
Expired - Lifetime
Application number
EP20010130569
Other languages
German (de)
English (en)
Other versions
EP1221359A1 (fr
Inventor
Karl Dr. Bendel
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1221359A1 publication Critical patent/EP1221359A1/fr
Application granted granted Critical
Publication of EP1221359B1 publication Critical patent/EP1221359B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/141—Magnetic parts used in percussive tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/221—Sensors

Definitions

  • the invention relates to a device with a Schwingungsisolier adopted according to the preamble of claim 1.
  • the hand tool has a housing on which on a side opposite a tool side a handle is arranged.
  • the handle is coupled at one end via a hinge to the housing. Further, the handle is connected at an opposite end of the rotary joint via an insulating device to the housing.
  • the insulating device has a helical compression spring, which is supported on the handle via a first spring support and on the housing via a second spring support.
  • the first spring seat is on the handle and the second spring seat is attached to the housing.
  • At the first spring support is a guide rod attached and protrudes with an end facing away from the handle through an opening of the second spring support.
  • the guide rod At the end facing away from the handle, the guide rod has a thread on which on the side facing away from the handle side of the second spring seat, a nut is screwed.
  • the guide rod is firmly connected to the second spring rest against the direction of action of the helical compression spring on the second spring rest.
  • a distance between a stop on the handle and a stop on the housing and a bias of the helical compression spring can be adjusted.
  • a hand tool with a handle which is connected at a first end via a hinge and at a second end via an insulating device with a housing of the power tool.
  • the insulating device has a helical compression spring with a relatively low clamping force. If a force applied to the handle exceeds a predetermined value of a normal application of the power tool, the handle comes into operative connection with a stop element connected in series with the helical compression spring.
  • the stop element is formed by a sleeve made of an elastic plastic.
  • the US 6,076,616 A discloses a device, in particular a hand tool, with a first unit excited by vibration during operation and with a second unit operatively connected to the first unit via a vibration isolator and with an operating force loading the vibration isolator.
  • the Schwingungsisolier Marie has an actuator, via which the operating force with a force is at least partially compensated.
  • the actuating force is at least largely independent of the present, to be isolated vibration.
  • the actuators are activated to compensate for vibrations by a control and control unit such that their vibration amplitudes are controlled in antiphase to the vibration of the first unit and largely correspond in size to the magnitude of the vibration of the first unit.
  • the invention is based on a device, in particular a hand-held power tool, with at least one first unit excited by a vibration during operation and with at least one second unit operatively connected to the first unit via a vibration isolator, with an exciter frequency to be isolated and with an operating force loading the oscillation isolating device during operation, the oscillation isolating device having an actuator by means of which the operating force can be at least partially compensated with a setting force, wherein the adjusting force is at least largely independent of the present oscillation to be isolated.
  • a maximum compensation frequency of the actuator is smaller than the exciter frequency of the device.
  • the compensation frequency is smaller than a natural frequency of the spring element.
  • the operating force can be compensated by the actuator and it can always be achieved with a soft, short, lightweight and space-saving spring element of Schwingungsisolier adopted an advantageous working position of the spring element, an advantageous travel and an advantageous insulation. It can be achieved a spring mass system or a vibrating system, which has a very low stiffness at high frequencies within a narrow stroke and high stiffness for low frequencies, which can be achieved for example in portable power tools advantageous leadership property.
  • the actuator can be designed in various ways, for example, this can be performed electrically, electromagnetically, hydraulically, etc. However, the actuator should allow a result of a vibration isolation caused movement of the second unit relative to the first unit and also have a constant force as the second unit due to vibration or should the actuator have a Kraftauslenkungskennline constant about a rest position of the spring mass system is. This can be achieved structurally simple with an actuator formed by a proportional magnet.
  • the operating force can be compensated.
  • the actuating force it is also possible for the actuating force to be set to different sizes as a function of other operating variables, for example as a function of a recognized operating mode of a handheld power tool.
  • a parameter for the operating force is detected with a sensor unit, it is possible with cost-effective sensors with a control unit to set up a simple control and, alternatively, a control unit.
  • the sensors should be able to detect a constant operating force.
  • the actuator is designed to be controllable by a control unit with a detected parameter for an operating force or for a spring travel resulting from the operating force, the operating force can be exactly compensated and disturbance variables, such as wear, can be advantageously compensated.
  • the solution according to the invention can be applied to various devices that appear appropriate to a person skilled in the art, such as, for example, the mounting of components such as motor vehicle axles, internal combustion engines, etc.
  • the operating force can be formed by a bearing force, a reaction force, and so forth vibration isolation on pressure and / or on train loading force. Due to the fact that a particularly cost-effective, lightweight and space-saving construction can be achieved with the solution according to the invention, however, the solution according to the invention can be used particularly advantageously in hand-held power tools, in particular in drilling and / or chipping hammers. If the actuator is arranged in the handle of the handheld power tool, the total mass of the handle can be increased and the insulation can be improved with the actuator.
  • Fig. 1 shows a drill and chisel hammer with an electric motor not shown in detail in a housing 34 and a gear and a percussion, via which a clamped in a tool holder 36 drill 38 is driven to rotate and beating. Contrary to an actuating direction 40 after the tool holder 36, a first, perpendicular to the operating direction 40 extending handle 42 is secured to the housing 34.
  • a second handle 10 On a side facing away from the drill 38 of the housing 34, a second handle 10 is arranged, which is connected at an end remote from a tool axis first end via an articulated pivotal connection 44 with the housing 34.
  • a handle can be made movable parallel to the machining direction, namely via rails or via multi-point suspension to leaf springs etc.
  • a handheld power tool with an axially displaceable housing could be designed accordingly the solution according to the invention is vibration isolated.
  • the Schwingungsisolier acquired 14 has a formed by a proportional solenoid, mounted in the handle 10 actuator 22 which is connected via a plunger 46 to the housing 34 in operative connection.
  • a prestressed helical compression spring 20 is guided, which is supported with a first end on the housing 34 and with a second end on the handle 10 and serves for vibration isolation.
  • a force acting on the handle 10 actuating force 12 can be compensated with a force 24 of the plunger 46 against the housing 34, by the adjusting force 24 generates a reaction force on the handle 10, which is the actuating force 12 opposite.
  • the actuator 22 can always be an advantageous working position of the prestressed helical compression spring 20 and an optimal distance of the handle 10 to the housing 34 can be achieved, wherein the actuating force 24 is independent of a present, to be isolated vibration of the housing 34 and the drill and chisel hammer. In a vibration isolation of the handle 10 can be moved against the helical compression spring 20, wherein the plunger 46 is also moved, but the force 24 of the actuator 22 remains unchanged.
  • a parameter for a resulting from the acting actuating force 12 spring travel of the handle 10 can be detected.
  • eddy current sensors are also other, the person skilled in the sense path sensors and distance sensors conceivable, such as strain gauges over which a bending of a connecting part or a spring element can be detected.
  • the detected parameters are forwarded via a data line to a control unit 32 which adjusts or compensates depending on the detected characteristics with the actuator 22, the actuating force 12 via the actuating force 24.
  • An exciter frequency of the drill and chisel to be isolated is between 40 Hz and 20 Hz, namely at a maximum beat frequency of 40 Hz and at a half reduced beat frequency of 20 Hz.
  • the helical compression spring 20 was tuned to about 10 Hz, whereby at a reduced beat frequency still an advantageous isolation can be achieved, and the control unit 32 only compensates frequencies up to about 5 Hz and has a maximum compensation frequency of 5 Hz.
  • the Schwingungsisolier acquired 16 in the 3 and 4 has a sensor unit 26 with a plate 58, on which a A helical compression spring 20 and a plunger 46 of an actuator 22 is supported and whose electrical resistance changes depending on a pressure force acting on it.
  • characteristics for the present actuating forces 12 can be detected, even for static or constant operating forces 12.
  • the detected characteristics are via a data line, which is guided by a guide pin 52, to a control unit 54 can be conducted via the one Adjusting force 24 of the actuator 22 is set to the present operating force 12 and the present operating force 12 can be compensated.
  • the vibration isolating device 18 in FIG Fig. 5 has a sensor unit 28 with a plate 50, on which a helical compression spring 20 is supported.
  • a plunger 46 of an actuator 22 acts directly on a housing 34 of a drill and chisel hammer.
  • compressive force whose electrical resistance changes, which can be detected by the sensor unit 28 characteristics for present actuating forces 12, even for static or constant operating forces 12.
  • the characteristics are via a data line to a control unit 56 can be conducted , via which a control force 24 of the actuator 22 adjusted to a present operating force 12 and the present operating force 12 can be compensated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (8)

  1. Dispositif, en particulier machine-outil manuelle, comprenant au moins une première unité (34) excitée en fonctionnement par des vibrations et au moins une deuxième unité (10) qui est en liaison fonctionnelle avec la première unité (10) par le biais d'un dispositif d'isolation des vibrations (14, 16, 18), avec une fréquence d'excitation à isoler et une force de fonctionnement (12) sollicitant en fonctionnement le dispositif d'isolation des vibrations (14, 16, 18), le dispositif d'isolation des vibrations (14, 16, 18) présentant un actionneur (22) par le biais duquel la force de fonctionnement (12) peut être compensée au moins en partie avec une force de réglage (24), la force de réglage (24) étant au moins essentiellement indépendante des vibrations présentes à isoler, caractérisé en ce qu'une fréquence d'équilibrage maximale de l'actionneur (22) est inférieure à la fréquence d'excitation.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'actionneur (22) est formé par un aimant proportionnel.
  3. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'isolation des vibrations (16, 18) présente une unité de capteur (26, 28) qui permet de détecter une grandeur caractéristique de la force de fonctionnement (12).
  4. Dispositif selon la revendication 3, caractérisé en ce que l'actionneur (22) peut être commandé par le biais d'une unité de commande (54) en fonction de la grandeur caractéristique détectée de la force de fonctionnement (12).
  5. Dispositif selon la revendication 3, caractérisé en ce que l'actionneur (22) peut être réglé en fonction de la grandeur caractéristique détectée de la force de fonctionnement (12) par le biais d'une unité de réglage (56).
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'isolation des vibrations (14) présente une unité de capteur (30) qui permet de détecter une grandeur caractéristique pour une course de ressort résultant de la force de fonctionnement (12) qui peut être régulée en fonction de la grandeur caractéristique détectée de l'actionneur (22) par le biais d'une unité de réglage (32).
  7. Machine-outil manuelle, en particulier marteau perforateur ou marteau piqueur, selon la revendication 1, qui présente au moins une poignée (10) fixée à un boîtier (34) et comprenant un dispositif d'isolation des vibrations (14, 16, 18) isolant la poignée (10) par rapport au boîtier (34), caractérisée en ce que le dispositif d'isolation des vibrations (14, 16, 18) présente un actionneur (22) par le biais duquel une force d'actionnement (12) appliquée à la poignée (10) peut être compensée au moins en partie avec une force de réglage (24), au moins sensiblement indépendamment de vibrations existantes du boîtier (34) à isoler.
  8. Machine-outil manuelle selon la revendication 7, caractérisée en ce que l'actionneur (22) est disposé dans la poignée (10).
EP20010130569 2001-01-05 2001-12-21 Dispositif d'isolation de vibrations Expired - Lifetime EP1221359B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001100378 DE10100378A1 (de) 2001-01-05 2001-01-05 Vorrichtung mit einer Schwingungsisoliereinrichtung
DE10100378 2001-01-05

Publications (2)

Publication Number Publication Date
EP1221359A1 EP1221359A1 (fr) 2002-07-10
EP1221359B1 true EP1221359B1 (fr) 2010-11-10

Family

ID=7669867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010130569 Expired - Lifetime EP1221359B1 (fr) 2001-01-05 2001-12-21 Dispositif d'isolation de vibrations

Country Status (2)

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EP (1) EP1221359B1 (fr)
DE (2) DE10100378A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10130088C2 (de) * 2001-06-21 2003-10-16 Hilti Ag Schlagendes Elektrohandwerkzeuggerät mit aktiver Vibrationsdämpfung
DE10158266B4 (de) * 2001-11-28 2004-01-15 Robert Bosch Gmbh Vorrichtung zur Vibrationsdämpfung eines Handgriffs einer Werkzeugmaschine
JP2009513366A (ja) * 2003-07-15 2009-04-02 ワツカー コンストラクション イクイップメント アクチェンゲゼルシャフト ばね弾性減衰式ハンドグリップを備えた作業機械
DE10332109B4 (de) * 2003-07-15 2009-01-15 Wacker Construction Equipment Ag Arbeitsgerät mit Handgriffabfederung
GB2407791A (en) * 2003-11-04 2005-05-11 Black & Decker Inc Vibration reduction apparatus for a power tool
GB2407790A (en) 2003-11-04 2005-05-11 Black & Decker Inc Vibration reduction apparatus for a power tool
GB2407789A (en) 2003-11-04 2005-05-11 Black & Decker Inc Vibration reduction apparatus for a power tool
DE102004019776A1 (de) 2004-04-23 2005-11-17 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Bohr- und/oder Schlaghammer
DE102005031074A1 (de) * 2005-06-24 2007-01-04 C. & E. Fein Gmbh Kraftgetriebenes Handwerkzeug mit Dämpfungseinrichtung
DE102009054648A1 (de) * 2009-12-15 2011-06-16 Robert Bosch Gmbh Elektrowerkzeug

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19646622B4 (de) * 1996-11-12 2004-07-01 Wacker Construction Equipment Ag An einem Handgriff führbares Arbeitsgerät

Also Published As

Publication number Publication date
DE50115703D1 (de) 2010-12-23
EP1221359A1 (fr) 2002-07-10
DE10100378A1 (de) 2002-07-25

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