WO2008107231A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

Info

Publication number
WO2008107231A1
WO2008107231A1 PCT/EP2008/051012 EP2008051012W WO2008107231A1 WO 2008107231 A1 WO2008107231 A1 WO 2008107231A1 EP 2008051012 W EP2008051012 W EP 2008051012W WO 2008107231 A1 WO2008107231 A1 WO 2008107231A1
Authority
WO
WIPO (PCT)
Prior art keywords
switching
longitudinal axis
hand tool
along
gearbox
Prior art date
Application number
PCT/EP2008/051012
Other languages
German (de)
English (en)
Inventor
Andre Ullrich
Thomas Bernhardt
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 WO2008107231A1 publication Critical patent/WO2008107231A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/003—Clutches specially adapted therefor

Definitions

  • the invention relates to a hand tool according to the preamble of claim 1.
  • the switching unit has at least one switching means for switching between different gear stages of the gearbox.
  • the invention relates to a hand tool, in particular a drill and / or chisel, with an at least two-stage manual transmission and a switching unit, which has at least one switching means for switching between different gear stages of the gearbox.
  • the switching unit has at least one rod-like guide means to guide the switching means, whereby a particularly stable switching unit and a simple switching of the different gear stages of the gearbox can be achieved structurally simple.
  • the rod-like guide means is formed by a guide rod, in particular fixed to a housing of a hand tool or together with the Switching means is arranged movably.
  • a "rod-like guide means" or a “guide rod” is to be understood as a guide means having a length which has at least twice, advantageously four times and particularly advantageously five times its diameter or its width.
  • gear ratios are to be understood in particular as meaning a plurality of gear stages, one of the gear stages each transmitting a torque different from the remaining gear stages to a power take-off means, in particular a rotating power take-off means, during operation of the power tool.
  • the handheld power tool has an intermediate shaft with a longitudinal axis which extends parallel to a longitudinal axis of the guide means, whereby structurally simple switching between the different gear stages, which are preferably arranged in different borrowed switching positions along the longitudinal axis on the intermediate shaft , can be achieved.
  • the switching means for switching between the different gear stages of the gearbox are movably arranged on the guide means along a longitudinal axis of the guide means, a direct switching between the different gear stages on the intermediate shaft can advantageously be achieved while saving further components.
  • a direct switching between the different gear stages on the intermediate shaft can advantageously be achieved while saving further components.
  • the switching means is formed by a switching plate, whereby a particularly simple and inexpensive embodiment of the switching means can be achieved.
  • a structurally simple and in particular direct switching while saving further components can be achieved if the switching means has a coupling region which is in engagement with a gear element of the gearbox.
  • Coupling region advantageously has a contour which is adapted to a contour of the transmission element.
  • the coupling region is preferably provided on a displacement of the switching means along the longitudinal axis on the guide means for displacing the gear element along the longitudinal axis of the intermediate shaft on the intermediate shaft.
  • the switching means has a further coupling region which is provided for coupling to an actuating element.
  • a particularly short switching path can be achieved by the actuating element via the switching means to a transmission element of the gearbox.
  • the actuating element can thereby indirectly via a further component, such as a switching spring, or particularly advantageous to couple directly to the coupling region of the switching means.
  • the guide means comprise at least one stop means, which is intended to limit a movement of the switching means in at least one direction along a longitudinal axis of the guide means.
  • the stop means is preferably arranged annularly around the guide rod, such as a snap ring.
  • FIG. 1 shows a hand tool according to the invention with a switching unit
  • FIG. 4 shows the switching unit in a first switching position (FIG. 4a) and in a second switching position (FIG.
  • FIG. 1 shows a hand-held power tool 10 formed by a hammer drill.
  • the hand tool 10 comprises a housing 42 and in a front area a tool holder 44 for receiving a tool.
  • the hand-held power tool comprises ne 10 a main handle 46 for operating the power tool 10 and a power transmission from an operator to the power tool 10th
  • the handheld power tool 10 has a drive unit 48 formed by an electric motor.
  • the drive torque of the drive unit 48 is transmitted via an intermediate shaft 20 of the power tool 10 to a non-illustrated pneumatic impact mechanism and / or a rotating, formed by a hammer tube driven means.
  • FIGS. 2 to 4 show a partial section of the handheld power tool 10 with a switching unit 14.
  • the switching unit 14 is provided for switching between different gear stages of a manual transmission 12.
  • the switching unit 14 a switching means 16 which is formed by a switching plate 30, and formed by a guide rod 62 rod-like guide means 18 which is fixedly arranged on the housing 42 of the power tool 10.
  • the rod-like guide means 18 is provided for guiding the switching means 16 and has a longitudinal axis 24 which extends parallel to a longitudinal axis 22 of the intermediate shaft 20 ( Figures 4a and 4b).
  • the switching plate 30 is movably mounted on the guide rod 62 along the longitudinal axis 24 of the guide rod 62.
  • the switching plate 30 has two annular regions 50, 52, which are provided for receiving the guide rod 62.
  • the two areas 50, 52 are arranged along the longitudinal axis 24 of the guide rod 62 on the switching plate 30 one after the other.
  • the guide rod 62 has a stop means 26 formed by a snap ring on, which is arranged along the longitudinal axis 24 fixed on the guide rod 62.
  • the switching plate 30 For switching between two different transmission stages of the gearbox 12, the switching plate 30 is provided, which for this purpose has a coupling region 32 for coupling to a gear element 34 of the gearbox 12 (FIG. 2).
  • the coupling region 32 has a main extension surface 54, which is aligned perpendicular to the longitudinal axis 24 of the guide rod 62.
  • the coupling region 32 is arranged on the switching plate 30 along the area 50 facing the abutment means 26, perpendicular to the longitudinal axis 24 of the guide rod 62.
  • the coupling region 32 of the switch panel 30 is formed for coupling to the transmission element 34 by a ring-segment-like extension.
  • the transmission element 34 of the gearbox 12 is movably mounted on the intermediate shaft 20 along the longitudinal axis 22 of the intermediate shaft 20 for shifting the different gear stages ( Figures 3, 4a and 4b).
  • the transmission element 34 has a receiving groove 56 into which the coupling region 32 of the shift plate 30 engages.
  • the switching plate 30 has a further coupling region 36, which is provided for coupling the switch plate 30 to an actuating element 38.
  • the further coupling region 36 is formed like a protuberance and aligned perpendicular to a direction of movement of the switching plate 30 along the longitudinal axis 24 of the guide rod 62 on the switching plate 30.
  • the extension-like coupling region 36 also extends on a side facing away from the first coupling region 32 side 58 on the switching plate 30.
  • a switching spring 60 of the switching unit 14 is arranged, the movement, in particular which transmits a rotary movement of the actuating element 38 to the switching plate 30 during an actuation by an operator.
  • the actuating element 38 has a transmission region 92 which is arranged eccentrically on the actuating element 38.
  • the switching spring 60 has a portion 64 with a cylindrical coil spring and two spring legs 66, 68.
  • the partial region 64 forms a receiving region for the extension-type coupling region 36 of the switch panel 30.
  • the switching plate 30 has a partial region 70 which has a main extension surface 40, which is substantially parallel to the longitudinal axis 24 of the guide rod 62 and perpendicular to the first coupling region 32 extends.
  • the subregion 70 is arranged between the coupling region 32 for coupling to the gear element 34 and the two regions 50, 52.
  • the two spring legs 66, 68 are guided between the portion 70 and the guide rod 62.
  • the partial area 70 also extends between the two spring legs 66, 68 along its main extension surface 40.
  • the switch plate 30 points to a side 72 facing the stop means 26 and on a side 74 facing away from the abutment means 26 in each case a lateral flank 76, 78 which extend along the regions 50, 52 and which, together with the subregion 70 and the guide rod 62, the two spring legs 66, 68 in a desired position hold ( Figures 2 and 3).
  • FIG. 4 a shows a first switching position of the actuating element 38 or the switching plate 30 along the direction 28 on the guide rod 62.
  • the shift plate 30 is located in a voltage applied to the stop means 26 Endposi- tion on the guide rod 62.
  • the transmission element 34 of the gearbox 12, to which the switching plate 30 couples by means of the coupling portion 32, has a gear 80 for transmitting a drive torque to the hammer tube and a second gear 82 which is coupled to a second, rotatably mounted on the intermediate shaft 20 gear member 84 of the gearbox 12 in a second switching position of the control panel 30 on the guide rod 62 ( Figure 4b).
  • the receiving groove 56 of the first gear member 34 for receiving the coupling portion 32 of the switch plate 30 is disposed between the two gears 80, 82 of the transmission element 34.
  • Switching plate 30 is also the first gear member 34 moves on the intermediate shaft 20 along the longitudinal axis 24 of the guide rod 62 and the longitudinal axis 22 of the intermediate shaft 20 in the direction 86 of the second gear member 84 and thereby the second gear 82 of the first gear member 34 in a receiving area 88th pushed with an internal toothing of the second gear member 84.
  • a torque from the intermediate shaft 20 via the first transmission element 34, which by means of a driving toothing 90 to a rotationally fixed connection with the intermediate shaft 20 is provided, transmitted to the second gear member 84 and from there to the output means.

Landscapes

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

Abstract

L'invention concerne une machine-outil portative, en particulier un marteau perforateur et/ou burineur, comportant un engrenage (12) à au moins deux vitesses et une unité de changement de vitesse (14) pourvue d'au moins un élément de changement de vitesse (16) permettant le passage entre différentes vitesses de l'engrenage (12). Selon l'invention, l'unité de changement de vitesse (14) présente au moins un élément de guidage (18) de type tige, destiné à guider l'élément de changement de vitesse (16).
PCT/EP2008/051012 2007-03-02 2008-01-29 Machine-outil portative WO2008107231A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007010183.1 2007-03-02
DE200710010183 DE102007010183A1 (de) 2007-03-02 2007-03-02 Handwerkzeugmaschine

Publications (1)

Publication Number Publication Date
WO2008107231A1 true WO2008107231A1 (fr) 2008-09-12

Family

ID=39357431

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/051012 WO2008107231A1 (fr) 2007-03-02 2008-01-29 Machine-outil portative

Country Status (2)

Country Link
DE (1) DE102007010183A1 (fr)
WO (1) WO2008107231A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9024221B2 (en) 2012-02-06 2015-05-05 Robert Bosch Gmbh Electrical switch device for a machine tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113414746B (zh) * 2021-07-02 2022-09-06 重庆弘愿工具(集团)有限公司 一种电锤挡位切换组件

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029614A1 (de) * 1970-06-16 1971-12-30 Metabowerke KG Closs, Rauch & Schnizler, 7440 Nürtingen Bohrhammer
EP0808695A2 (fr) * 1996-05-22 1997-11-26 ATLAS COPCO ELEKTROWERKZEUGE GmbH Foreuse à percussion
DE19848073A1 (de) * 1997-10-22 1999-06-10 Makita Corp Drehzahländerungseinrichtung für eine Werkzeugmaschine
DE10041410A1 (de) * 1999-08-26 2001-07-19 Makita Corp Bohrhammer mit einem Mechanismus zur Einstellung einer Betriebsart
DE102005041447A1 (de) * 2005-08-31 2007-03-01 Robert Bosch Gmbh Bohrhammer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029614A1 (de) * 1970-06-16 1971-12-30 Metabowerke KG Closs, Rauch & Schnizler, 7440 Nürtingen Bohrhammer
EP0808695A2 (fr) * 1996-05-22 1997-11-26 ATLAS COPCO ELEKTROWERKZEUGE GmbH Foreuse à percussion
DE19848073A1 (de) * 1997-10-22 1999-06-10 Makita Corp Drehzahländerungseinrichtung für eine Werkzeugmaschine
DE10041410A1 (de) * 1999-08-26 2001-07-19 Makita Corp Bohrhammer mit einem Mechanismus zur Einstellung einer Betriebsart
DE102005041447A1 (de) * 2005-08-31 2007-03-01 Robert Bosch Gmbh Bohrhammer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9024221B2 (en) 2012-02-06 2015-05-05 Robert Bosch Gmbh Electrical switch device for a machine tool

Also Published As

Publication number Publication date
DE102007010183A1 (de) 2008-09-04

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