EP0564624B1 - Marteau-foreur - Google Patents

Marteau-foreur Download PDF

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Publication number
EP0564624B1
EP0564624B1 EP92922016A EP92922016A EP0564624B1 EP 0564624 B1 EP0564624 B1 EP 0564624B1 EP 92922016 A EP92922016 A EP 92922016A EP 92922016 A EP92922016 A EP 92922016A EP 0564624 B1 EP0564624 B1 EP 0564624B1
Authority
EP
European Patent Office
Prior art keywords
sliding sleeve
hammer drill
retaining ring
rotary drive
sleeve
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
EP92922016A
Other languages
German (de)
English (en)
Other versions
EP0564624A1 (fr
Inventor
Ulrich Rauser
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 EP0564624A1 publication Critical patent/EP0564624A1/fr
Application granted granted Critical
Publication of EP0564624B1 publication Critical patent/EP0564624B1/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
    • 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
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0015—Tools having a percussion-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0038—Tools having a rotation-only mode

Definitions

  • the invention is based on a rotary hammer according to the preamble of claim 1.
  • EP 318 480 B2 already discloses a rotary hammer which can be switched over from drilling to chisel operation, but whose switching device is not synchronized. That is, the changeover cannot be carried out with just one hand on the control handle when the gears to be engaged are tooth-to-tooth.
  • the switching sleeve is a part that is difficult to manufacture, which is produced in investment casting with cleared teeth, internal grinding and hardening of the entire part.
  • a rotary hammer with a switching device for switching from drilling to chisel operation is known.
  • the switching device has a spring-loaded, axially displaceable switching sleeve, which is provided with a toothing at the end. Due to the spring loading of the switching sleeve in the direction of the engagement position of its toothing, synchronization is ensured. On the other hand, the switching sleeve with the toothing formed thereon is also very expensive to manufacture.
  • the hammer drill according to the invention with the characterizing features of claim 1 has two main advantages.
  • the operating mode switch can be operated with one hand at any time, and on the other hand the manufacture of the switching parts is considerably simplified and in particular the volume of the parts to be hardened is reduced.
  • the sliding sleeve connected to the shift lever is not directly engaged is particularly advantageous bringing gears is provided, but these are arranged on separate, spring-loaded coupling parts. This also makes a complete hardening of the entire sliding sleeve unnecessary.
  • the switching sleeve is designed as an unserrated sliding sleeve.
  • the retaining ring follows the axial movement of the sliding sleeve by spring force as soon as the internal toothing attached to the retaining ring can engage in the external toothing on the rotary drive sleeve.
  • the retaining ring is secured against rotation in the circumferential direction relative to the gear housing, for example by means of a pin.
  • the synchronization of the switchover to the rotary mode is achieved by a spring-loaded gear, which engages with the corresponding position of the sliding sleeve in the associated external toothing on the rotary drive sleeve.
  • Figure 1 shows a longitudinal section through a hammer drill and Figure 2 shows a cross section along the line II-II in Figure 1.
  • the hammer drill shown in the detail has a housing 2, in which a gear housing 3 is inserted more in the rear part. Both housing parts 2, 3 can also be formed in one piece.
  • a gear housing 3 is inserted more in the rear part. Both housing parts 2, 3 can also be formed in one piece.
  • the motor pinion 4 meshes with a bevel gear 5, which is held on an intermediate shaft 6.
  • On the intermediate shaft 6 sits a known wobble drive 8, which drives a piston 9 back and forth.
  • the piston 9 drives a striker 10 via an air cushion, which acts on a striker 11, which in turn passes the strikes on to a drilling or chiseling tool.
  • Piston 9 and racket 10 are guided in a tube which also serves as a rotary drive sleeve 13.
  • the rotary drive sleeve 13 carries an interrupted external toothing consisting of two sections 14, 15, which can also be in one piece.
  • a gear 16 is in engagement with the external toothing 15 as a coupling part.
  • the gear 16 has an internal toothing 17 extending over part of its axial length.
  • the spring 18 is designed as a spiral compression spring, but it can also be designed in any other way in order to exert a compressive force on the gear 16 in the direction of the toothing 15.
  • the gear 16 carries on the periphery a further toothing 19 which meshes with a gear 20 only indicated in FIG. 2 on a secondary shaft 21.
  • the auxiliary shaft 21 carries a second gear 22 which meshes with an end toothing 23 at the front end of the intermediate shaft 6.
  • An axial switching sleeve is arranged around the rotary drive sleeve 13 and consists of two parts, a sliding sleeve 25 and a retaining ring 26. Both are arranged coaxially to the rotary drive sleeve 13 and adjoin one another.
  • the sliding sleeve 25 serves as a switching element for the axial displacement of the gear 16 and the retaining ring 26. It is longer than at least half the axial switching path the external toothing 15 shown in FIG. 1 can therefore also be shorter than in the exemplary embodiment.
  • the sliding sleeve 25 has an outwardly projecting extension 27, which has an opening 28 for engaging an eccentric bolt 29 on a switching means 30, in particular a rotary lever (cf. FIG. 2).
  • the extension 27 is preferably hardened in the area of the opening 28, the tubular main part of the sliding sleeve 25 can remain soft.
  • the retaining ring 26 has an internal toothing 31 corresponding to the external toothing 14. It is pressed against the sliding sleeve 25 by the force of a spring 32 which is supported against a shoulder in the front part of the transmission housing 3.
  • the retaining ring 26 also has an approximately radially projecting tab 34, which is fixed relative to the transmission housing 3 by means of a pin 35 arranged coaxially to the retaining ring. The pin 35 is held on both sides in the front part of the gear housing 3 and also extends through the extension 27 of the sliding sleeve 25.
  • the entire operating mode switch consists of the parts: rotary lever 30, sliding sleeve 25, toothing 14, 15, 17 and 31, gear 16, retaining ring 26 and the two springs 18 and 32.
  • the sliding sleeve 25 meets the associated end faces during the switching movements End faces of gear 16 and retaining ring 26. With the sliding sleeve 25, this allows high manufacturing tolerances in the millimeter range or considerable hardness distortion without loss of function. Tilting of the sliding sleeve 25 because of the eccentric attack of the bolt 29 is harmless, in contrast to known solutions, since no toothing has to be found.
  • the hammer is shown in the percussion drilling operating mode, ie the gearwheel 16, which is constantly driven by the gearwheel 20, is coupled in a rotationally fixed manner to the rotary drive sleeve 13 via the toothings 17, 15.
  • the sliding sleeve 25 is shifted to the right in its axial direction in FIG. 1 by means of the shift lever 30 in FIG. 1 until the gear is displaced so far against the spring 18 that the toothings 15, 16 disengage.
  • the rotary drive is now switched off.
  • the rotary drive sleeve 13 and thus the tool holder are freely rotatable relative to the housing of the hammer and relative to the motor. Should now z. B.

Abstract

Afin de synchroniser dans un marteau perforateur et burineur le passage du mode perforation au mode burinage et vice-versa, un manchon (25) axialement coulissant est capable d'agir sur des organes de commutation sollicités par des ressorts, notamment une roue dentée (16) et une bague de retenue (26). La roue dentée (16) est en prise avec le moteur rotatif d'entraînement et peut être couplée par des dents (15, 17) à un manchon d'entraînement rotatif (13). La bague de retenue (16) est reliée par une goupille (35) au boîtier (3) de l'engrenage de manière à ne pas tourner et peut être couplée par des dents (14, 31) au manchon d'entraînement rotatif (13). On peut ainsi passer d'un mode de fonctionnement à un autre sans faire attention à la position des dents. L'invention a en outre l'avantage de simplifier les pièces constitutives du dispositif et de réduire le volume des pièces devant être trempées.

Claims (7)

  1. Perforateur comportant un boîtier (2, 3) dans lequel est logé un moteur transmettant son couple par l'intermédiaire d'un engrenage (6, 21, 16) à une douille d'entraînement en rotation (13) et, de là, à un porte-outil, un commutateur de mode de fonctionnement qui permet de passer du forage rotatif au burinage ou inversement en agissant sur des organes d'accouplement (15, 16), ainsi qu'une douille coulissante (25) qui peut être actionnée par des moyens de commutation (30) manoeuvrables de l'extérieur, caractérisé en ce que les organes d'accouplement (15, 16) peuvent être dégagés l'un de l'autre contre l'action d'une force élastique, par l'intermédiaire de la douille (25) qui peut coulisser axialement sur un pignon (16) pouvant lui-même coulisser axialement et soumis à l'action d'un ressort (18) en direction de la douille (25), le pignon (16) étant en prise avec une denture (15) solidaire en rotation de la douille d'actionnement (13), tandis que la douille coulissante (25) est une pièce distincte, séparée des organes d'accouplement (15, 16).
  2. Perforateur selon la revendication 1, caractérisé en ce que la douille coulissante (25) est dépourvue de denture et peut coulisser contre une bague de maintien (26) dentée, soumise à l'influence d'un ressort (32) agissant dans le sens d'accouplement.
  3. Perforateur selon la revendication 2, caractérisé en ce que le ressort (32) exerce sur la bague de maintien (26) une poussée en direction de la douille coulissante (25).
  4. Perforateur selon les revendications 2 ou 3, caractérisé en ce que la bague de maintien (26) présente une denture interne (31) qui peut coulisser sur une denture externe (14) de la douille d'entraînement en rotation (13).
  5. Perforateur selon l'une des revendications 2 à 4, caractérisé en ce que la bague de maintien (26) est empêchée de tourner, à sa périphérie, par rapport au boîtier d'engrenage (3).
  6. Perforateur selon l'une des revendications précédentes, caractérisé en ce que le pignon (16) peut être rendu, par sa denture interne (17), solidaire en rotation de la douille d'entraînement (13).
  7. Perforateur selon l'une des revendications précédentes, caractérisé en ce que la douille coulissante (25) n'est pas durcie en grande partie.
EP92922016A 1991-10-25 1992-10-17 Marteau-foreur Expired - Lifetime EP0564624B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4135240A DE4135240A1 (de) 1991-10-25 1991-10-25 Bohrhammer
DE4135240 1991-10-25
PCT/DE1992/000873 WO1993007995A1 (fr) 1991-10-25 1992-10-17 Marteau-foreur

Publications (2)

Publication Number Publication Date
EP0564624A1 EP0564624A1 (fr) 1993-10-13
EP0564624B1 true EP0564624B1 (fr) 1996-07-17

Family

ID=6443402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92922016A Expired - Lifetime EP0564624B1 (fr) 1991-10-25 1992-10-17 Marteau-foreur

Country Status (4)

Country Link
US (1) US5379848A (fr)
EP (1) EP0564624B1 (fr)
DE (2) DE4135240A1 (fr)
WO (1) WO1993007995A1 (fr)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9304540D0 (en) * 1993-03-05 1993-04-21 Black & Decker Inc Power tool and mechanism
JP2602411Y2 (ja) * 1993-11-26 2000-01-17 日立工機株式会社 打撃工具の切換機構
JP3424880B2 (ja) * 1995-08-18 2003-07-07 株式会社マキタ ハンマードリル
DE19540391A1 (de) * 1995-10-30 1997-05-07 Hilti Ag Bohr- und Meisselgerät
DE19717712A1 (de) * 1997-04-18 1998-10-22 Black & Decker Inc Bohrhammer
US5954140A (en) * 1997-06-18 1999-09-21 Milwaukee Electric Tool Corporation Rotary hammer with improved pneumatic drive system
DE19810088C1 (de) * 1998-03-10 1999-08-26 Bosch Gmbh Robert Bohr- und/oder Schlaghammer mit in Abhängigkeit von der Einstecktiefe eines Werkzeuges aktivierbarem Schlagwerk
DE19851888C1 (de) * 1998-11-11 2000-07-13 Metabowerke Kg Bohrhammer
DE19955412A1 (de) * 1999-11-18 2001-05-23 Hilti Ag Bohr- und Meisselgerät
GB0008465D0 (en) 2000-04-07 2000-05-24 Black & Decker Inc Rotary hammer mode change mechanism
DE10037808A1 (de) * 2000-08-03 2002-02-14 Bosch Gmbh Robert Handwerkzeugmaschine
GB0100605D0 (en) * 2001-01-10 2001-02-21 Black & Decker Inc Hammer
GB0213289D0 (en) * 2002-06-11 2002-07-24 Black & Decker Inc Rotary hammer
GB0214772D0 (en) * 2002-06-26 2002-08-07 Black & Decker Inc Hammer
GB2394517A (en) * 2002-10-23 2004-04-28 Black & Decker Inc Powered hammer having a spindle lock with synchronising element
DE10312980B4 (de) * 2003-03-24 2018-05-03 Robert Bosch Gmbh Bohrhammer oder Schlagbohrmaschine
GB0311045D0 (en) * 2003-05-14 2003-06-18 Black & Decker Inc Rotary hammer
DE102004026845A1 (de) * 2004-06-02 2005-12-22 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Bohr- und/oder Schlaghammer
GB2414701A (en) * 2004-06-05 2005-12-07 Black & Decker Inc Rotary spindle for a power tool
DE102004031628A1 (de) * 2004-06-30 2006-02-02 Robert Bosch Gmbh Vorrichtung mit einer Innenschale und einer Außenschale eines Gehäuses einer Handwerkzeugmaschine
DE102004058686A1 (de) * 2004-09-03 2006-03-09 Robert Bosch Gmbh Elektrowerkzeug mit einem zwischen den Betriebsarten Bohren, Schlagbohren, Meißeln umschaltbaren Antrieb
EP1674207B1 (fr) 2004-12-23 2008-12-10 BLACK & DECKER INC. Outil motorisé
DE102005000042A1 (de) * 2005-04-25 2006-10-26 Hilti Ag Bohr-oder Meisselhammer
JP5055749B2 (ja) * 2005-11-16 2012-10-24 マックス株式会社 ハンマドリル
DE102006032214A1 (de) * 2006-07-12 2008-01-17 Robert Bosch Gmbh Handwerkzeugmaschine mit einer Schlagwerkeinheit
DE102008000677A1 (de) * 2008-03-14 2009-09-17 Robert Bosch Gmbh Handwerkzeugmaschine für schlagend angetriebene Einsatzwerkzeuge
DE102008000687A1 (de) * 2008-03-14 2009-09-17 Robert Bosch Gmbh Handwerkzeugmaschine für schlagend angetriebene Einsatzwerkzeuge
DE102008022454B4 (de) * 2008-05-08 2014-06-26 Aeg Electric Tools Gmbh Bohrhammer
DE102008040031A1 (de) 2008-06-30 2009-12-31 Robert Bosch Gmbh Mehrgang-Getriebevorrichtung und Werkzeugmaschine
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
DE102010062099A1 (de) * 2010-11-29 2012-05-31 Robert Bosch Gmbh Hammerschlagwerk
DE102012209446A1 (de) * 2012-06-05 2013-12-05 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
DE102012212399A1 (de) * 2012-07-16 2014-01-16 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
US9630307B2 (en) 2012-08-22 2017-04-25 Milwaukee Electric Tool Corporation Rotary hammer
JP2014100762A (ja) * 2012-11-19 2014-06-05 Makita Corp 打撃工具
CN103963028B (zh) * 2013-02-06 2016-09-14 苏州宝时得电动工具有限公司 动力工具
EP2842696B1 (fr) * 2013-08-30 2016-06-01 HILTI Aktiengesellschaft Outil électrique
DE102015206634A1 (de) * 2015-04-14 2016-10-20 Robert Bosch Gmbh Werkzeugvorsatz für eine Handwerkzeugmaschine
JP6479570B2 (ja) * 2015-05-19 2019-03-06 株式会社マキタ 作業工具
KR102500749B1 (ko) * 2021-10-01 2023-02-20 계양전기 주식회사 전동햄머

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2136523C3 (de) * 1971-07-21 1983-11-03 Hilti AG, 9494 Schaan Elektrobohrhammer
CH534036A (de) * 1972-04-18 1973-02-28 Rudolf Studer Fabrik Elek Sche Motorisch, insbesondere durch Elektromotor, angetriebener Schlagbohrhammer
DE2229388C3 (de) * 1972-06-16 1981-01-22 Robert Bosch Gmbh, 7000 Stuttgart Von Hand zu führender Bohrhammer
US3837409A (en) * 1973-02-26 1974-09-24 Skil Corp Rotary hammer power tool
DE2516406C3 (de) * 1975-04-15 1981-11-19 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3538166A1 (de) * 1985-10-26 1987-04-30 Hilti Ag Bohrhammer mit dreharretierung
DE3627869A1 (de) * 1986-08-16 1988-02-18 Bosch Gmbh Robert Schlagwerkabschaltung
DE3807078A1 (de) * 1988-03-04 1989-09-14 Black & Decker Inc Bohrhammer

Also Published As

Publication number Publication date
EP0564624A1 (fr) 1993-10-13
US5379848A (en) 1995-01-10
WO1993007995A1 (fr) 1993-04-29
DE4135240A1 (de) 1993-04-29
DE59206785D1 (de) 1996-08-22

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