EP0847837A2 - Mehrganggetriebe für Handwerkzeugmaschine - Google Patents
Mehrganggetriebe für Handwerkzeugmaschine Download PDFInfo
- 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- Withdrawn
Links
Images
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)
Abstract
Description
- Fig. 1
- ausschnittweise einen Längsschnitt eines Mehrganggetriebes eines elektrischen Bohrhammers mit Meißelbetrieb,
- Fig. 2
- eine Draufsicht eines Planetenradträgers im Mehrganggetriebe in Richtung Pfeil II in Fig. 1, vergrößert dargestellt,
- Fig. 3
- eine Draufsicht eines Stirnrads im Mehrganggetriebe in Richtung Pfeil III in Fig. 1, vergrößert dargestellt,
- Fig. 4
- ausschnittweise einen Schnitt des Stirnrads im Mehrganggetriebe der Fig. 1 in verschiedenen Verschiebestellungen zur Erläuterung der Gangwahl.
30 die Nocken 32 an der Vorgelegewelle 13 aufgenommen haben und mit diesen in Drehrichtung fluchten. Damit ist das Stirnrad 21 drehfest mit der Vorgelegewelle 13 verbunden, und deren Drehbewegung wird im Übersetzungsverhältnis 1:1 auf den Zahnkranz 20 der Spindelhülse 19 und damit auf das Werkzeug 18a übertragen.
Claims (10)
- Mehrganggetriebe für Handwerkzeugmaschinen mit drehendem Werkzeug, wie Bohr- oder Schlagbohrmaschine oder Bohrhammer mit oder ohne Meißelfunktion, mit einer Spindel (19) zum Drehantrieb eines Werkzeugs (18a), mit einem mit der Spindel (19) gekuppelten, dazu koaxialen Zahnkranz (20) und mit einer mit dem Zahnkranz (20) in mindestens zwei Gangstufen koppelbaren, antreibbaren Vorgelegewelle (13), die ein Sonnenrad (23) eines Planetengetriebes (22) trägt, dadurch gekennzeichnet, daß auf der Vorgelegewelle (13) ein mit dem Zahnkranz (20) in Drehschluß befindliches Stirnrad (21) angeordnet ist, das wahlweise an das Planetengetriebe (22) oder an die Vorgelegewelle (13) ankuppelbar ist.
- Getriebe nach Anspruch 1, dadurch gekennzeichnet, daß das Stirnrad (21) frei drehend und axial verschieblich auf der Vorgelegewelle (13) sitzt und daß durch Axialverschiebung des Stirnrads (21) dieses zum einen mit einem Planetenradträger (24) des Planetengetriebes (22) und zum anderen mit der Vorgelegewelle (13) jeweils drehfest verbindbar ist.
- Getriebe nach Anspruch 2, dadurch gekennzeichnet, daß das Stirnrad (21) auf seiner dem Planetengetriebe (22) zugekehrten Seitenringfläche (212) mindestens eine axial vorstehende Klaue (29) und der Planetenradträger (24) mindestens eine Radialschulter (281) trägt, an die die Klaue (29) durch Stirnradverschiebung zur Drehmitnahme anlegbar ist.
- Getriebe nach Anspruch 3, dadurch gekennzeichnet, daß die Radialschulter (281) in einer axialen Ausnehmung (28) ausgebildet ist, die in die dem Stirnrad (21) zugekehrte Seitenringfläche (242) des Planetenradträgers (24) eingebracht ist und vorzugsweise in der auf der Vorgelegewelle (13) sitzenden Innenringfläche (241) des Planetenradträgers (24) mündet.
- Getriebe nach einem der Ansprüche 2 - 4, dadurch gekennzeichnet, daß das Stirnrad (21) in seiner auf der Vorgelegewelle (13) sitzenden Innenringfläche (211) mindestens eine radiale Aussparung (30) aufweist, die in Achsrichtung einerseits in der dem Planetengetriebe (22) zugekehrten Seitenringfläche (242) des Stirnrads (24) und andererseits in einer in die Innenringfläche (241) benachbart eingebrachten Ringnut (31) mündet, und daß die Vorgelegewelle (13) mindestens einen radialen Nocken (32) trägt, der bei Stirnradverschiebung in die Aussparung (30) zur Drehmitnahme des Stirnrads (21) einzudringen vermag.
- Getriebe nach Anspruch 5, dadurch gekennzeichnet, daß die axiale Breite der Ringnut (31) größer ist als der Verschiebeweg des Stirnrads (21) vom Ineinandergreifen von Aussparung (30) und Nocken (32) an der Vorgelegewelle (13) bis zum Ineinandergreifen von Klaue (27) und Ausnehmung (28) im Planetenradträger (24).
- Getriebe nach einem der Ansprüche 2 - 6, dadurch gekennzeichnet, daß das Stirnrad (21) in eine Stellung verschiebbar ist, in welcher es in Außereingriff mit Vorgelegewelle (13) und Planetengetriebe (22) ist und ein feststehender Arretierzapfen (33) in die Stirnradverzahnung (213) eingreift.
- Getriebe nach Anspruch 7, dadurch gekennzeichnet, daß der Arretierzapfen (33) an einem Maschinengehäuse der Handwerkzeugmaschine angeordnet ist.
- Getriebe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Planetengetriebe (22) ein Hohlrad (26) mit Innenverzahnung aufweist, mit der Planetenräder (25) des Planetengetriebes (22) in ständigem Eingriff sind, wobei das Hohlrad (26) gegenüber dem Maschinengehäuse undrehbar festgelegt ist.
- Handwerkzeugmaschine mit drehendem Werkzeug, insbesondere Bohr- oder Schlagbohrmaschine oder Bohrhammer mit oder ohne Meißelfunktion, mit einem Mehrgangetriebe nach einem der Ansprüche 1 bis 9.
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 (de) | 1998-06-17 |
| EP0847837A3 EP0847837A3 (de) | 2002-01-02 |
Family
ID=7814561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97117384A Withdrawn EP0847837A3 (de) | 1996-12-13 | 1997-10-08 | Mehrganggetriebe für Handwerkzeugmaschine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0847837A3 (de) |
| JP (1) | JPH10180513A (de) |
| DE (1) | DE19651828A1 (de) |
Cited By (5)
| 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 (de) * | 2006-12-27 | 2008-07-10 | Robert Bosch Gmbh | Handwerkzeugmaschine |
| WO2012113152A1 (en) * | 2011-02-25 | 2012-08-30 | Bosch Power Tools (China) Co., Ltd. | Transmission shaft device |
| EP3181303A1 (de) * | 2015-12-14 | 2017-06-21 | HILTI Aktiengesellschaft | Steuerungsverfahren und handwerkzeugmaschine |
Families Citing this family (7)
| 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)
| 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 |
-
1996
- 1996-12-13 DE DE1996151828 patent/DE19651828A1/de not_active Withdrawn
-
1997
- 1997-10-08 EP EP97117384A patent/EP0847837A3/de not_active Withdrawn
- 1997-12-10 JP JP9340035A patent/JPH10180513A/ja not_active Abandoned
Cited By (11)
| 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 (de) * | 2006-12-27 | 2008-07-10 | Robert Bosch Gmbh | Handwerkzeugmaschine |
| WO2012113152A1 (en) * | 2011-02-25 | 2012-08-30 | Bosch Power Tools (China) Co., Ltd. | Transmission shaft device |
| 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 (de) * | 2015-12-14 | 2017-06-21 | HILTI Aktiengesellschaft | Steuerungsverfahren und handwerkzeugmaschine |
| WO2017102415A1 (de) * | 2015-12-14 | 2017-06-22 | Hilti Aktiengesellschaft | Steuerungsverfahren und handwerkzeugmaschine |
| US10906166B2 (en) | 2015-12-14 | 2021-02-02 | Hilti Aktiengesellschaft | Control method and portable power tool |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0847837A3 (de) | 2002-01-02 |
| JPH10180513A (ja) | 1998-07-07 |
| DE19651828A1 (de) | 1998-06-18 |
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