WO2008107250A1 - Système d'engrenage - Google Patents

Système d'engrenage Download PDF

Info

Publication number
WO2008107250A1
WO2008107250A1 PCT/EP2008/051316 EP2008051316W WO2008107250A1 WO 2008107250 A1 WO2008107250 A1 WO 2008107250A1 EP 2008051316 W EP2008051316 W EP 2008051316W WO 2008107250 A1 WO2008107250 A1 WO 2008107250A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear unit
transmission
torque
transmission device
overload clutch
Prior art date
Application number
PCT/EP2008/051316
Other languages
German (de)
English (en)
Inventor
Andre Ullrich
Tobias Herr
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 WO2008107250A1 publication Critical patent/WO2008107250A1/fr

Links

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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/141—Mechanical overload release couplings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
    • F16D7/04—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type
    • F16D7/042—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type with at least one part moving axially between engagement and disengagement
    • F16D7/044—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type with at least one part moving axially between engagement and disengagement the axially moving part being coaxial with the rotation, e.g. a gear with face teeth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H35/00—Gearings or mechanisms with other special functional features
    • F16H35/10—Arrangements or devices for absorbing overload or preventing damage by overload

Definitions

  • the invention relates to a transmission device according to the preamble of claim 1.
  • the gear unit has at least two torque transmission areas for transmission of different drive speeds.
  • the invention relates to a transmission device, in particular for a drill and / or chisel hammer with an overload clutch and a gear unit with at least two torque transmission areas to a transmission of different drive speeds.
  • the gear unit has at least one force transmission element of the overload clutch, which is provided for coupling to a latching element of the overload clutch.
  • a "overload clutch” is to be understood in particular a clutch which is a maximum to be transferred
  • the gear unit Protection of the gear unit can be achieved. This can be achieved particularly advantageously if the gear unit and the force transmission Transmission element of the overload clutch are at least partially formed in one piece.
  • the transmission device according to the invention is used in conjunction with a drill and / or chisel, and this due to their advantageous combination of overload clutch and torque transmission for different drive speeds.
  • the transmission device can also be used with other machine tools, in particular hand-held power tools, which appear appropriate to the person skilled in the art.
  • the force transmission element has a trapezoidal end profile, whereby a uniform distribution of a force along a trapezoidal leg can be achieved.
  • the gear unit has a plurality of trapezoidal force transmission elements, wherein the individual force transmission elements are advantageously arranged uniformly spaced from each other in a circumferential direction.
  • the expert appear appropriate sense end profiles in an alternative embodiment of the invention are always conceivable.
  • the transmission device comprises an output device on which the gear unit is mounted, a particularly compact arrangement of the gear unit saving space and space can be achieved, in particular if a drive torque can be transmitted to the output device by means of the gear unit.
  • the output means is preferably formed by a rotating output means, in particular by a hammer tube.
  • the force transmission element is provided for at least partially rotationally fixed coupling with the output means, whereby an advantageous torque transmission to the output means with a simultaneous protection of the output means against overloading can be achieved.
  • An "at least partially non-rotatable coupling” is to be understood in particular as a coupling which, during operation of a hand-held power tool, up to a maximum transferable torque to a rotationally fixed connection between two components provided for torque transmission leads and in an overload, in particular in a torque overload, leads to an interruption of torque transmission.
  • the power transmission element can couple directly or indirectly with the output means, such as, for example, via the non-rotatably arranged on the output means locking element.
  • the different torque transmission regions of the gear unit have different working radii, whereby structurally simple different torques or different drive speeds can be transmitted to the output means and thus to a tool.
  • the gear unit has at least one partial area which is arranged between the different torque transmission areas.
  • a further function and / or additional installation space such as, for example, a required installation space, which can compensate for a shift travel during a shift operation between different transmission stages, can be achieved particularly advantageously.
  • a "partial area” is to be understood here in particular as an area which is arranged between the two torque transmission areas and which extends perpendicular to a radius of one of the torque transmission areas between the two torque transmission areas on the gear unit.
  • the gear unit is formed by a sintered component, whereby a particularly cost-effective production of the gear unit can be achieved.
  • a particularly cost-effective production of the gear unit can be achieved.
  • FIG. 2 shows a side section of the power tool with the gear device in a side view
  • FIG. 3 shows a gear unit of the gear device in a perspective view.
  • FIG. 1 shows a hand-held power tool 34 formed by a hammer drill.
  • the hand tool 34 comprises a housing 36 and in a front region a tool holder 38 for receiving a tool.
  • the handheld power tool 34 comprises a main handle 40 for actuating the handheld power tool 34 and a power transmission from an operator to the handheld power tool 34.
  • the power tool 34 has a drive unit 42.
  • the drive torque of the drive unit 42 is transmitted via an intermediate shaft 52 of the hand tool 34 to a striking mechanism 44, which is only partially shown in FIG. 2 for the sake of clarity, and / or to a rotating output means 26 formed by a hammer tube 46 (FIG ).
  • FIG. 2 shows a partial region of the handheld power tool 34 with a transmission device 10.
  • the transmission device 10 comprises an overload clutch 12 and one of a sintered component. formed gear unit 14 with two torque transmission areas 16, 18, which are provided for a transmission of different torques or different driving speeds on the hammer tube 46.
  • the two torque transmission areas 16, 18 are each formed by an outer toothing, which can be coupled to a torque transmission with a corresponding toothing of each of a torque transmission means 48, 50 of the transmission device 10.
  • the torque transmission means 48, 50 are mounted on the intermediate shaft 52 of the transmission device 10. Torque is transmitted to the gear unit 14 within the transmission apparatus 10 along a power flow direction 54 from the intermediate shaft 52 via one of the two torque transmitting means 48, 50.
  • the first torque transmission region 16 of the gear unit 14 has a working radius 28 which is greater than a working radius 30 of the second torque transmission region 18, so that different drive speeds can be realized during operation of the handheld power tool 34 or the transmission device 10 by means of the two torque transmission regions 16, 18. Figure 2).
  • a partial area 32 of the gear unit 14 is additionally arranged along the force flow direction 54, which has a smooth, gearless contour.
  • the partial region 32 compensates for a switching path on the intermediate shaft 52, which is required for switching between the two torque transmission means 48, 50 (FIGS. 2 and 3).
  • the torque or the drive speed is transmitted further from the gear unit 14 to the hammer tube 46.
  • the gear unit 14 is mounted on the hammer tube 46 ( Figure 2).
  • the gear unit 14 For transmission of torque to the hammer tube 46, the
  • Gear unit 14 a plurality of power transmission elements 20 of the overload clutch 12.
  • the power transmission elements 20 are provided for coupling to a detent element 22 of the overload clutch 12 and are arranged on a surface 56 of the gear unit 14 directed in the direction of force flow 54 (FIG. 3).
  • the gear unit 14 and the power transmission elements 20 are integrally formed.
  • the power transmission elements 20 have a trapezoidal End profile 24 and are arranged uniformly spaced in a circumferential direction 58 of the gear unit 14 to each other.
  • the force transmission elements 20 extend in the direction of force flow 54 in the manner of a projection on the gear unit 14 (FIG. 3).
  • the locking element 22 is rotationally fixed and along the power flow direction 54 by means of a snap ring, not shown fixedly mounted on the hammer tube 46.
  • the latching element 22 on a side facing the gear unit 14 side 60 a to the gear unit 14 and to the power transmission elements 20 of the gear unit 14 corresponding, not shown here transmission contour.
  • a spring element 62 of the overload clutch 14 formed by a helical spring is arranged on the hammer tube 46 in front of the gear unit 14, the gear unit 14 or the power transmission elements 20 of the gear unit 14 to a coupling with the locking element 22 in the transmission contour of the locking element 22nd suppressed.
  • a support element 64 is arranged along the force flow direction 54 in front of the spring element 62, which is arranged fixedly in the force flow direction 54 by means of a snap ring not shown on the hammer tube 46 ( Figure 2).
  • a coupling between the gear unit 14 or the force transmission elements 20 and the detent element 22 is caused by means of the spring element 62.
  • a maximum transmittable torque of the hand tool machine 34 via a tool located in the tool holder 38 on an object to be machined results from an interaction of a spring force of the spring element 62 and a configuration of the force transmission elements 20.
  • the side 68 of the gear unit facing toward the detent element 22 14 arranged force transmission elements 20 have a circumferential direction 58 arranged transmission edge 66, which has a step-like transition between the trapezoidal front profile 24 of a force transmission element 20 and the locking element 22 side facing 68 of Gear unit 14 forms.
  • the transmission flank 66 of the force transmission elements 20 has a slope which, in cooperation with the spring force of the spring element 62, defines a maximum torque to be transmitted.
  • the gear unit 14 is rotatably connected to the hammer tube 46 via the latching element 22 by means of the force transmission elements 20. If the torque required for the rotation of the tool exceeds the maximum transmittable torque, an interruption of the torque transmission is caused by means of the overload clutch 12.
  • the gear unit 14, which is movably mounted along the direction of force flow 54 on the hammer tube 46, against the spring force of the spring element 62 against the power flow direction 54 on the hammer tube 46 is shifted and the force transmission elements 20 are pressed out of the transmission contour of the locking element 22. A torque transmission from the gear unit 14 to the locking element 22 and thus to the hammer tube 46 is canceled.

Landscapes

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

Abstract

L'invention concerne un système d'engrenage, en particulier pour un marteau perforateur et/ou burineur, comportant un embrayage de surcharge (12) et un ensemble roue dentée (14) pourvu d'au moins deux zones de transmission de couple de rotation (16, 18) permettant la transmission de différentes vitesses d'entraînement. Selon l'invention, l'ensemble roue dentée (14) présente au moins un élément de transmission de force (20) de l'embrayage de surcharge (12), lequel élément de transmission de force est prévu pour être accouplé à un élément à encliquetage (22) de l'embrayage de surcharge (12).
PCT/EP2008/051316 2007-03-02 2008-02-04 Système d'engrenage WO2008107250A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007010062.2 2007-03-02
DE200710010062 DE102007010062A1 (de) 2007-03-02 2007-03-02 Getriebevorrichtung

Publications (1)

Publication Number Publication Date
WO2008107250A1 true WO2008107250A1 (fr) 2008-09-12

Family

ID=39374389

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/051316 WO2008107250A1 (fr) 2007-03-02 2008-02-04 Système d'engrenage

Country Status (2)

Country Link
DE (1) DE102007010062A1 (fr)
WO (1) WO2008107250A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104251294A (zh) * 2013-06-28 2014-12-31 罗伯特·博世有限公司 手持式工具机变速器装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823885A (en) * 1986-08-08 1989-04-25 Makita Electric Works, Ltd. Torque adjusting device for power driven rotary tools
EP0437060A2 (fr) * 1990-01-09 1991-07-17 Black & Decker Inc. Outil rotatif motorisé à double mode d'opération
EP1702723A1 (fr) * 2005-03-18 2006-09-20 Black & Decker, Inc. Embrayage à surcharge de couple pour outil motorisé
WO2007101735A1 (fr) * 2006-03-03 2007-09-13 Robert Bosch Gmbh Couplage commutable pour un outil électronique manuel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823885A (en) * 1986-08-08 1989-04-25 Makita Electric Works, Ltd. Torque adjusting device for power driven rotary tools
EP0437060A2 (fr) * 1990-01-09 1991-07-17 Black & Decker Inc. Outil rotatif motorisé à double mode d'opération
EP1702723A1 (fr) * 2005-03-18 2006-09-20 Black & Decker, Inc. Embrayage à surcharge de couple pour outil motorisé
WO2007101735A1 (fr) * 2006-03-03 2007-09-13 Robert Bosch Gmbh Couplage commutable pour un outil électronique manuel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104251294A (zh) * 2013-06-28 2014-12-31 罗伯特·博世有限公司 手持式工具机变速器装置

Also Published As

Publication number Publication date
DE102007010062A1 (de) 2008-09-04

Similar Documents

Publication Publication Date Title
EP1924407B1 (fr) Perceuse a main a mecanisme intermittent
EP2132453B1 (fr) Systeme d'engrenage
EP1334805B1 (fr) Unité de commutation pour des modes de fonctionnement pour un marteau à percussion
EP2097225B1 (fr) Machine-outil manuelle
EP3363595B1 (fr) Dispositif de transmission pour une machine-outil
DE102005041447A1 (de) Bohrhammer
EP2379281B1 (fr) Machine-outil portative
EP2134512B1 (fr) Système d'engrenage
CH693405A5 (de) Elektrohandwerkzeugmaschine.
EP2234769A1 (fr) Machine-outil dotée d'un dispositif de transmission comportant au moins un arbre intermédiaire logé de façon rotative
EP1259357B1 (fr) Machine-outil
EP3053708B1 (fr) Dispositif auxiliaire
EP2097224B1 (fr) Machine-outil manuelle
WO2008107250A1 (fr) Système d'engrenage
EP2104594B1 (fr) Machine-outil portative
EP2129494B1 (fr) Machine-outil portative
WO2008107245A1 (fr) Système d'engrenage
WO2008107231A1 (fr) Machine-outil portative
DE102013212548A1 (de) Handwerkzeugmaschinengetriebevorrichtung
DE102004056411A1 (de) Handwerkzeugmaschine mit Betriebsartumschaltung
DE102012212399A1 (de) Handwerkzeugmaschinenvorrichtung
EP3900881A1 (fr) Machine-outil portative électrique pourvue d'embrayage à butée à billes
DE102016204621A1 (de) Getriebevorrichtung
WO2008107257A1 (fr) Système d'engrenage

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08708620

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 08708620

Country of ref document: EP

Kind code of ref document: A1