EP0847837A2 - Transmission à plusieurs vitesses pour un outil à main motorisé - Google Patents

Transmission à plusieurs vitesses pour un outil à main motorisé Download PDF

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Publication number
EP0847837A2
EP0847837A2 EP97117384A EP97117384A EP0847837A2 EP 0847837 A2 EP0847837 A2 EP 0847837A2 EP 97117384 A EP97117384 A EP 97117384A EP 97117384 A EP97117384 A EP 97117384A EP 0847837 A2 EP0847837 A2 EP 0847837A2
Authority
EP
European Patent Office
Prior art keywords
gear
spur gear
countershaft
transmission according
planetary gear
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.)
Withdrawn
Application number
EP97117384A
Other languages
German (de)
English (en)
Other versions
EP0847837A3 (fr
Inventor
Helmut Lebisch
Egbert Dr. Schneider
Helmut Wanek
Markus Heckmann
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 EP0847837A2 publication Critical patent/EP0847837A2/fr
Publication of EP0847837A3 publication Critical patent/EP0847837A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms

Definitions

  • the invention relates to a multi-speed transmission for a Hand tool with rotating tool, such as drilling or Impact drill or hammer drill with or without Chisel function, defined in the preamble of claim 1 Genus.
  • the ring gear in the first gear, the ring gear is shifted so that it by means of a locking toothing is stuck on the locking piece.
  • the one with the The countershaft connected sun gear thus moves over the The planet carrier with a translation of 1: 3.4 in rotation.
  • the Tool spindle Over the ring gear that with the Combing the external toothing of the planet gear carrier, the Tool spindle with a low speed of 700 rpm driven.
  • the ring gear is in its middle Position moved in which it is also in the External toothing of the wheel engages so that it is on Planet carrier is blocked.
  • the planet carrier is thus directly connected to the sun gear, and
  • the gear rim of the tool spindle is translated driven by 1: 1 at a speed of 2250 rpm.
  • the multi-speed transmission according to the invention with the characteristic Features of claim 1 has the advantage that the planetary gear is not switchable, but only engaged in first gear, i.e. on that Tool spindle driving spur gear over its ring gear is activated. In the second gear, the spur gear becomes direct switched to the countershaft and transmits its rotation with a gear ratio of 1: 1 to the Tool spindle.
  • These constructive measures can be taken the multi-speed transmission much easier and cheaper execute, e.g. the additional wheel in the planetary gear with external toothing and the required fastening webs to attach this wheel to the planet carrier.
  • the multi-speed transmission is compact and requires less installation space and has a lower weight, making it particularly good suitable for use in the 3 kg hammer drill class. in the Contrary to the known multi-speed transmission is one Gear change possible at full speed.
  • the optional coupling of the spur gear to countershaft and Planetary gear in a structurally simple manner causes the spur gear to rotate freely and move axially sits on the countershaft.
  • the Spur gear By axial displacement of the Spur gear this one with a planet carrier Planetary gear and the other with the countershaft each rotatably connected.
  • the spur gear for the rotationally fixed connection with the Planet gear carrier on its one facing the planetary gear Side ring surface at least one axially projecting claw and the planet gear carrier has at least one radial shoulder to which the claw can be created by rotating the spur gear for driving is.
  • This radial shoulder is preferred in an axial Recess formed in the face of the spur gear Side ring surface of the planet carrier is introduced.
  • the spur gear in its sitting on the countershaft Inner ring surface at least one radial recess, which in Axis direction on the one hand in the direction of the planetary gear Side ring surface of the spur gear and on the other hand in one the annular groove adjacent to the inner ring surface opens.
  • the countershaft carries at least one radial cam, the with spur gear displacement in the at least one recess Rotational drive of the spur gear is able to penetrate.
  • the in the Inner ring surface of the spur gear additionally provided annular groove allows the radial cam to penetrate further Layshaft in the spur gear when the spur gear is ready is moved to its axially projecting claw in the Planet gear carrier trained recess to enter.
  • Multi-speed gearbox is in an electric hammer drill Chisel operation used.
  • the machine housing of the hammer drill is a drive pinion 10 stored, the non-rotatably on an output shaft 11 one shown electric motor sits.
  • the drive pinion 10 combs with a gear 12 that rotatably on a countershaft 13th sits in the camps, not shown here Machine housing is stored.
  • On the countershaft 13 is in known manner arranged a wobble 14, the one Percussion mechanism 15 a reciprocating axial drive movement mediated.
  • the striking mechanism 15 acts on a racket 16 which via a striker 18 in a tool holder 17 in not in a manner shown rotatably and axially displaceable tool 18a received in the axial direction acted upon.
  • a spindle sleeve 19 is coaxial with the striking axis rotatably mounted in the machine housing, which with the Tool holder 17 is rotatably connected.
  • the ring gear 20 is in constant engagement with the external toothing 213 of a spur gear 21 which rotates freely and is axially displaceable on the countershaft 13 and which can be shifted manually in three selected displacement positions on the countershaft 13 by means of a gearshift slide not shown here. These three selected shift positions are shown in FIG. 4 and bring about a gear change from the chisel position shown in FIG. 1 (FIG. 4d), into the second gear (FIG. 4c) or the first gear (FIG. 4a) of the multi-gear transmission.
  • a planetary gear 22 which in a known manner consists of a sun gear 23 with external teeth, a planet carrier 24 with three planet gears 25 offset by 120 o circumferential angle to each other and a ring gear 26 with internal teeth.
  • the sun gear 23 is connected in a rotationally fixed manner to the countershaft 13 or — as here — its external toothing is applied directly to the countershaft 13.
  • the planet gear carrier 24 is freely rotating on the countershaft 13 and carries a planet gear 25 on three axially projecting axles 27 which are each offset by 120 o circumferential angles from one another.
  • the external teeth of the planet gears 25 are in constant engagement with the external teeth of the sun gear 23 and the Internal toothing of the ring gear 26, which is fixed non-rotatably relative to the machine housing.
  • the planet gear carrier 24 has three recesses 28 which are offset from one another by 120 o circumferential angles on the inner ring surface and which are introduced into the side ring surface 242 of the planet gear carrier 24 facing the spur gear 21 and to the one seated on the countershaft 13 Inner ring surface 241 of the planet carrier 24 are open.
  • the spur gear 21 carries on its side ring surface 212 facing the planetary gear 22 three axially projecting claws 29 which are offset by 120 o circumferential angles from one another and which are arranged and designed such that when the spur gear 21 is displaced on the countershaft 13 into the recesses 28 in the planet gear carrier 24 can penetrate.
  • a lower claw 29 can be seen in FIG.
  • three radial recesses 30 are arranged in the inner ring surface 211 of the spur gear 21 facing the countershaft 13, offset by 120 ° circumferential angle (FIG. 3). These three recesses 30 are each offset by 60 o circumferential angle with respect to the three claws 29.
  • Each of the three recesses 30 opens on the one hand on the side ring surface 212 of the spur gear 21 facing the spur gear 22 and on the other hand in an annular groove 31 (FIG.
  • the countershaft 13 carries in the area between the spur gear 21 and the planetary gear 22 three cams 32 which protrude radially on the circumference and which are offset from one another by 120 ° circumferential angles. In Fig. 1, only two cams 32 can be seen. These three cams 32 are arranged and designed such that they can enter the recesses 30 in the spur gear 21 when the spur gear 21 is axially displaced and can be inserted through the recess 30 into the annular groove 31. The displacement of the spur gear 21 between the chisel position of the multi-speed transmission, in which the spur gear 21 assumes an end position seen in FIG.
  • the spur gear 21 is to be pushed into the position shown in FIG. 4c by means of the manual gearshift slide, not shown. In this position, the spur gear 21 is shifted so far in the direction of the planetary gear 22 that the recesses 30 have received the cams 32 on the countershaft 13 and are aligned with them in the direction of rotation.
  • the spur gear 21 is thus connected in a rotationally fixed manner to the countershaft 13, and its rotational movement is transmitted in a gear ratio of 1: 1 to the ring gear 20 of the spindle sleeve 19 and thus to the tool 18a.
  • 4b shows a transitional position of the spur gear 21 between second and first gear of the multi-speed transmission, in which the previously in second gear with the recesses 30 in the direction of rotation aligned cams 32 on the countershaft 13 further into the Have annular groove 31 inserted in the spur gear 24 so that the Rotary connection between spur gear 24 and countershaft 13 is canceled again and the spur gear 24 is free again the countershaft 13 can rotate.
  • the invention is not based on the described Embodiment limited. So can the invention Multi-speed gearbox also in other hand machine tools are used, for. B. in drills or Impact drills.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Structure Of Transmissions (AREA)
  • Retarders (AREA)
  • Portable Power Tools In General (AREA)
EP97117384A 1996-12-13 1997-10-08 Transmission à plusieurs vitesses pour un outil à main motorisé Withdrawn EP0847837A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19651828 1996-12-13
DE1996151828 DE19651828A1 (de) 1996-12-13 1996-12-13 Mehrganggetriebe für Handwerkzeugmaschinen

Publications (2)

Publication Number Publication Date
EP0847837A2 true EP0847837A2 (fr) 1998-06-17
EP0847837A3 EP0847837A3 (fr) 2002-01-02

Family

ID=7814561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97117384A Withdrawn EP0847837A3 (fr) 1996-12-13 1997-10-08 Transmission à plusieurs vitesses pour un outil à main motorisé

Country Status (3)

Country Link
EP (1) EP0847837A3 (fr)
JP (1) JPH10180513A (fr)
DE (1) DE19651828A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6732815B2 (en) 2001-03-07 2004-05-11 Black & Decker, Inc. Hammer
GB2428757A (en) * 2005-08-04 2007-02-07 Bosch Gmbh Robert An electric hand tool with mode changing device operated by axial movement of a layshaft
WO2008080658A1 (fr) * 2006-12-27 2008-07-10 Robert Bosch Gmbh Machine-outil portative
WO2012113152A1 (fr) * 2011-02-25 2012-08-30 Bosch Power Tools (China) Co., Ltd. Dispositif d'arbre de transmission
EP3181303A1 (fr) * 2015-12-14 2017-06-21 HILTI Aktiengesellschaft Procédé de commande et machine-outil manuelle

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19851888C1 (de) * 1998-11-11 2000-07-13 Metabowerke Kg Bohrhammer
SE537498C2 (sv) * 2011-11-04 2015-05-19 Atlas Copco Ind Tech Ab Drivarrangemang i ett pneumatiskt motordrivet verktyg
DE102012212231A1 (de) * 2012-07-12 2014-01-16 Hilti Aktiengesellschaft Handwerkzeugmaschine
DE102012214938B4 (de) 2012-08-22 2016-11-10 Metabowerke Gmbh Getriebeanordnung für eine angetriebene Werkzeugmaschine sowie Werkzeugmaschine mit einer solchen Getriebeanordnung
GB2531995A (en) * 2014-10-20 2016-05-11 Black & Decker Inc Pneumatic hammer
DE102017121717A1 (de) 2017-09-19 2019-03-21 Metabowerke Gmbh Stellglied und Getriebeanordnung für eine angetriebene Werkzeugmaschine
DE102017121720B4 (de) 2017-09-19 2025-07-31 Metabowerke Gmbh Getriebeanordnung für eine angetriebene Werkzeugmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573370A (en) * 1983-07-08 1986-03-04 The Rotor Tool Company Gear reversing mechanism for power tools
DE3934283A1 (de) * 1988-10-14 1990-05-03 Hitachi Koki Kk Schaltgetriebe fuer eine elektrisch angetriebene werkzeugmaschine
JP2558753Y2 (ja) * 1991-10-31 1998-01-14 株式会社マキタ 回転電動工具の動力伝達機構
DE4213291C2 (de) * 1992-04-23 1997-12-04 Atlas Copco Elektrowerkzeuge Getriebeeinrichtung einer handgeführten Bohrhammermaschine

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6732815B2 (en) 2001-03-07 2004-05-11 Black & Decker, Inc. Hammer
US6948571B2 (en) 2001-03-07 2005-09-27 Black & Decker Inc. Hammer
GB2428757A (en) * 2005-08-04 2007-02-07 Bosch Gmbh Robert An electric hand tool with mode changing device operated by axial movement of a layshaft
GB2428757B (en) * 2005-08-04 2007-11-07 Bosch Gmbh Robert An electric hand tool with a mode changing device
US7591324B2 (en) 2005-08-04 2009-09-22 Robert Bosch Gmbh Clutch device for an electric machine tool and an electric machine tool
WO2008080658A1 (fr) * 2006-12-27 2008-07-10 Robert Bosch Gmbh Machine-outil portative
WO2012113152A1 (fr) * 2011-02-25 2012-08-30 Bosch Power Tools (China) Co., Ltd. Dispositif d'arbre de transmission
CN103249529A (zh) * 2011-02-25 2013-08-14 博世电动工具（中国）有限公司 传动轴装置
EP3181303A1 (fr) * 2015-12-14 2017-06-21 HILTI Aktiengesellschaft Procédé de commande et machine-outil manuelle
WO2017102415A1 (fr) * 2015-12-14 2017-06-22 Hilti Aktiengesellschaft Procédé de commande et machine-outil portative
US10906166B2 (en) 2015-12-14 2021-02-02 Hilti Aktiengesellschaft Control method and portable power tool

Also Published As

Publication number Publication date
EP0847837A3 (fr) 2002-01-02
JPH10180513A (ja) 1998-07-07
DE19651828A1 (de) 1998-06-18

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