WO2004028751A1 - Systeme de reception d'outil - Google Patents

Systeme de reception d'outil Download PDF

Info

Publication number
WO2004028751A1
WO2004028751A1 PCT/DE2003/001769 DE0301769W WO2004028751A1 WO 2004028751 A1 WO2004028751 A1 WO 2004028751A1 DE 0301769 W DE0301769 W DE 0301769W WO 2004028751 A1 WO2004028751 A1 WO 2004028751A1
Authority
WO
WIPO (PCT)
Prior art keywords
insertion opening
bolt
sleeve
tool holder
locking
Prior art date
Application number
PCT/DE2003/001769
Other languages
German (de)
English (en)
Inventor
Karl Frauhammer
Heinz Schnerring
Joerg Friedrich
Andreas Strasser
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
Priority to EP03740049.6A priority Critical patent/EP1542835B1/fr
Priority to JP2004538675A priority patent/JP2005538858A/ja
Publication of WO2004028751A1 publication Critical patent/WO2004028751A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B25D17/084—Rotating chucks or sockets
    • B25D17/088—Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor

Definitions

  • the invention is based on a tool holder according to the preamble of claim 1, in particular for a rotary or chisel hammer.
  • a tool holder for a hammer drill or chisel hammer which enables an axial locking of a tool shank with a predetermined axial play.
  • the tool holder has radially displaceable, roller-shaped locking elements which engage in a radially inner position in a groove-shaped recess in the lateral surface of the tool shaft and thereby axially lock the tool shaft, whereas the locking elements release the tool shaft in a radially outer position so that the Tool shank can be inserted or removed.
  • the known tool holder has an operating part in the form of a sleeve, which the locking element ß surrounds and can be moved axially by a user between a workpiece-side locking position and a tool-side unlocking position to lock or unlock the tool shank, wherein the control panel is biased by a spring in the direction of the workpiece-side locking position.
  • the locking elements can move radially outward, so that the tool shaft can simply be pulled out or inserted from the insertion opening.
  • the Makita HR4000C hammer drill also has such a tool holder and, moreover, enables one-hand operation by the axially displaceable
  • Control panel is locked in the unlocked position by a locking mechanism.
  • the user can therefore move the control panel axially with one hand from the locked position to the unlocked position, where the control panel engages.
  • the user can then insert or remove the tool shank with the same hand without having to hold the control panel in the meantime.
  • the sleeve-shaped operating part is locked in the unlocking position by a radially displaceable bolt, which, however, is free on the outside of the tool holder is accessible and therefore exposed to material abrasion, which leads to considerable wear.
  • the invention encompasses the general technical teaching of protecting the locking mechanism for locking the operating part by a cover, so that the locking mechanism is not exposed to material abrasion, which leads to less wear.
  • the cover for the locking mechanism can, for example, have a sleeve that surrounds the locking mechanism on the outside, the sleeve preferably being made of an elastic material. This offers the advantage that the cuff can simply be pulled on and is then fixed due to its inherent tension.
  • the cover for the locking mechanism can be integrated in the displaceable operating part for locking or unlocking the tool shank.
  • this can be achieved in that the locking mechanism is arranged inside the sleeve-shaped operating part. So here it forms
  • Control unit itself part of the cover for the locking mechanism.
  • the sleeve-shaped loading is used in part axially displaceably on a generally hollow cylindrical receiving body, wherein the receiving body of the tool testifies. It is advantageous here if the sleeve-shaped operating part surrounds the receiving body in an annular manner at least on one of its two end faces, in order to make it more difficult for material abrasion to penetrate into the interior of the sleeve-shaped operating part.
  • the axially displaceable operating part therefore lies on one of its end faces, preferably slidingly on the lateral surface of the receiving body, in order to achieve a sealing of the operating part and to prevent the penetration of material abrasion.
  • the operating part can have a wiper which rests on the outer lateral surface of the receiving body and when the sleeve-shaped operating part is axially displaced
  • Strips material abrasion which is located on the outer surface of the receiving body.
  • the sleeve-shaped operating part is locked by a
  • the bolt that is essentially radially displaceable with respect to the insertion opening of the tool holder.
  • the bolt can either assume a locking position or a release position, the bolt axially locking the sleeve-shaped operating part in the locking position, so that the user does not have to hold the operating part in place when inserting or removing the tool shank from the insertion opening, which makes comfortable one-hand operation possible is made possible.
  • the release position the sleeve-shaped control element is not locked and can therefore move move to its rest position, which is usually achieved by spring tension.
  • the bolt itself is preferably loaded by a spring element which holds the bolt in the locking position if the user does not bring the bolt from the locking position into the release division by manual intervention.
  • the power transmission from the spring element to the bolt can take place directly.
  • the force transmission from the spring element to the bolt takes place indirectly via a force transmission element in order to achieve good force transmission.
  • the force transmission element can be, for example, a ball which is mounted in a radial bore and is biased radially inwards by the spring element.
  • the spring element for pretensioning the bolt can be a leaf spring, for example, but an annular spring is also suitable.
  • the locking position of the bolt lies radially inward with respect to the insertion opening, whereas the release position of the bolt lies radially outward with respect to the insertion opening.
  • the bolt thus moves in the radial direction from the outside in when the transition from the release position into the locking position with respect to the insertion opening.
  • the locking position of the bolt lies radially on the outside with respect to the insertion opening, whereas the release position of the bolt lies radially on the inside with respect to the insertion opening.
  • the bolt thus moves in the radial direction from the inside to the outside in the transition from the release division into the locking position with respect to the insertion opening.
  • Bolts for locking the sleeve-shaped operating part are mounted in a guide bore which runs radially with respect to the insertion opening in the receiving body and are thus axially fixed with respect to the receiving body. In this case, the bolt is not moved in the axial direction when the sleeve-shaped operating part is displaced.
  • the bolt engages in the locking position in a latching element which is arranged in the sleeve-shaped operating part, which can be, for example, an undercut or a receiving bore.
  • the sleeve-shaped control panel preferably has an axially extending groove on its inside, the
  • Bolt has a head which is guided axially in the groove. This prevents radial movement of the bolt outside of the unlocked position of the sleeve-shaped operating part.
  • the groove indicates the movement of the bolt the locking position is free, whereby the sleeve-shaped operating part is locked axially.
  • the bolt for locking the sleeve-shaped control part prefferably be mounted in a guide bore which extends radially with respect to the insertion opening and therefore also to be carried along in the axial direction when the sleeve-shaped control part is displaced axially.
  • the invention also includes a machine tool with the tool holder according to the invention, which is, for example, a hammer drill or chisel hammer.
  • FIG. 1 shows a cross-sectional view of a tool holder according to the invention for a rotary hammer with a sleeve-shaped operating part in a locking position
  • 2 shows the tool holder from FIG. 1, the sleeve-shaped operating part being in an unlocked position
  • Fig. 3 is a detailed view of a bolt guide of the tool holder according to Figures 1 and 2 and
  • FIG. 4 shows a further detailed view of the bolt guide from FIG. 3.
  • FIGS. 1 and 2 show a tool holder 10 for a hammer drill, which is partially of conventional construction, so that to supplement the following description reference is made to the patent document DE 100 01 191 C2 already mentioned at the outset, the content of the present description in its entirety is attributable.
  • the tool holder 10 has an essentially hollow-cylindrical holder body 12 with a cylindrical insertion opening 14, into which a tool shaft 16 of a drill can be axially inserted in order to lock the drill in the tool holder 10.
  • the tool shank 16 is locked in the insertion opening 14 here by a plurality of roller-shaped locking elements 18, which are arranged so as to be radially movable in corresponding openings in the wall of the receiving body 12.
  • the openings taper radially inwards with respect to the insertion opening 14 in order to prevent the locking elements 18 from inwards from the openings fall out when the tool shaft 16 is removed from the insertion opening 14.
  • the locking of the tool shank 16 is effected in that the locking elements 18 engage in axially extending grooves 20 in the outer lateral surface of the tool shank 16, so that the tool shank 16 is fixed in the tool holder 10 with a predetermined axial play.
  • the axial play of the lock is determined by the ratio of the lengths of the locking elements 18 and the grooves 20.
  • the tool holder 10 has a sleeve-shaped control part 22 which can be displaced on the outer lateral surface of the holder body 12 between the locking position shown in FIG. 1 and the unlocking position shown in FIG. 2.
  • the spiral spring 24 thus presses the operating part 22 into the locking position shown in FIG. 1, in which the tool shaft 16 is axially locked in the tool holder 10.
  • control panel 22 prevents with its inside that the locking elements 18 can move radially outward to the To release the lock.
  • the inside of the operating part 22 is flush with the outer lateral surface of the receiving body 12.
  • an annular recess 30 lies in the sleeve-shaped control element 22 on the outside over the openings of the locking elements 18.
  • the locking elements 18 can therefore be in the unlocking position of the operating part 22 dodge radially outward, so that the tool shaft 16 can simply be pulled axially out of the insertion opening 14 or inserted into it.
  • a rubber sleeve 32 is arranged in the recess 30 of the operating part 22, which rests on the outer lateral surface of the receiving body 12 and seals the gap between the operating part 22 and the receiving body 12 in order to prevent the penetration of material abrasion or dirt.
  • the tool holder 10 enables convenient one-hand operation by locking the operating part 22 in the unlocked position. This offers the advantage that the user does not have to hold the operating part 22 in the unlocked position despite the pretension of the spiral spring 24.
  • the control part 22 is locked in the unlocking position by a bolt 34 which is in a guide bore which extends radially with respect to the insertion opening 14 the wall of the receiving body 12 is radially displaceably mounted.
  • the operating part 22 On its inside, the operating part 22 has an axially extending guide groove 36 which is T-shaped in cross section, as can be seen in particular from the detailed representations in FIGS. 3 and 4. Furthermore, the bolt 34 has a bolt head 36, which is guided in the guide groove 36, radial movement of the bolt 34 with respect to the insertion opening 14 being prevented by the guide groove 36, as long as the operating part 22 is not in the unlocked position.
  • the guide groove 36 in the operating part 22 opens at its workpiece end, as can be seen from the detailed illustration in FIG. 3. In the unlocking position shown in FIG. 2, the bolt 34 can therefore move radially inwards with respect to the insertion opening 14 until the bolt head 38 rests on the outer lateral surface of the receiving body 12, as shown in FIG. 2.
  • the movement of the bolt 34 into the locking position is effected here by two ring springs 40, 42, which are arranged on the outside of the operating part 22 in a ring surrounding the plane, which is perpendicular to the longitudinal axis of the Insertion opening 14 extends, the two ring springs 40, 42 being axially spaced apart.
  • the two ring springs 40, 42 rest radially on the outside against a metal ball 44, which is arranged in a radially extending guide bore in the operating part 22, the metal ball 44 being radially displaceable in the guide bore.
  • the guide bore for the metal ball 44 tapers radially inwards so that the metal ball 44 cannot fall out of the control part 22 inwards.
  • the two ring springs 40, 42 press the metal ball 44 radially inwards onto the bolt head 38, so that the bolt 34 is brought radially inwards into the locking position.
  • the locking of the bolt 34 is released by pushing the tool shank 16 axially into the insertion opening 14 such that the inner end face of the tool shank 16 presses against the free end of the bolt 34, whereby the bolt 34 is pressed radially outward until the bolt head 38 is finally again in the plane of the guide groove 36.
  • the bolt head 38 then no longer blocks the outgoing grooves of the guide groove 36, so that the spiral spring 24 presses the operating part 22 axially in the direction of the locking position shown in FIG. 1.
  • the tool holder has an annular sleeve 46 made of rubber, which encloses the control part 22 at its tool-side end, the two ring springs 40, 42, the metal ball 44, the guide bore in the
  • Control panel 22 and the bolt 34 are covered.
  • the man- cuff 46 prevents material abrasion or dirt from entering the control panel 22.
  • the sleeve 46 surrounds the receiving body 12 in an annular manner, the sleeve 46 resting on the outer lateral surface of the receiving body 12 with a sealing lip. In this way it is prevented that material abrasion or dirt can penetrate through the annular gap between the operating part 22 and the receiving body 12.
  • the collar 46 has a radially inwardly projecting, circumferential projection which, in the assembled state, lies in an annular circumferential groove on the outside of the control part 22, as a result of which the collar 46 is axially fixed on the control part 22.

Landscapes

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

Abstract

La présente invention concerne un système de réception d'outil (10), notamment destiné à un marteau perforateur ou un marteau burineur, comprenant une ouverture d'introduction (14) qui permet de recevoir une tige d'outil (16), au moins une partie de commande (22) qui permet un verrouillage ou un déverrouillage axial de la tige d'outil (16) dans l'ouverture d'introduction (14) et qui est mobile entre une position de verrouillage et une position de déverrouillage, ainsi qu'au moins un mécanisme de blocage (34 - 44) qui bloque la partie de commande (22) dans la position de déverrouillage et/ou dans la position de verrouillage. Selon cette invention, le mécanisme de blocage (34 - 44) est recouvert à l'extérieur par un revêtement (46), en direction radiale par rapport à l'ouverture d'introduction (14), afin d'éviter un encrassement et une usure par abrasion de matière.
PCT/DE2003/001769 2002-09-18 2003-05-30 Systeme de reception d'outil WO2004028751A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03740049.6A EP1542835B1 (fr) 2002-09-18 2003-05-30 Porte-outil
JP2004538675A JP2005538858A (ja) 2002-09-18 2003-05-30 工具取付け部

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002143288 DE10243288B4 (de) 2002-09-18 2002-09-18 Werkzeugaufnahme
DE10243288.0 2002-09-18

Publications (1)

Publication Number Publication Date
WO2004028751A1 true WO2004028751A1 (fr) 2004-04-08

Family

ID=32009840

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/001769 WO2004028751A1 (fr) 2002-09-18 2003-05-30 Systeme de reception d'outil

Country Status (5)

Country Link
EP (1) EP1542835B1 (fr)
JP (1) JP2005538858A (fr)
CN (1) CN100400242C (fr)
DE (1) DE10243288B4 (fr)
WO (1) WO2004028751A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005000097A1 (de) * 2005-07-28 2007-02-01 Hilti Ag Schlagwerkzeugaufnahme
DE102009028890B4 (de) * 2009-08-26 2014-11-20 Hilti Aktiengesellschaft Werkzeugaufnahme
DE102010062583A1 (de) * 2010-12-08 2012-06-14 Robert Bosch Gmbh Werkzeugmaschine, insbesondere Handwerkzeugmaschine
DE102011075858A1 (de) * 2011-05-16 2012-11-22 Robert Bosch Gmbh Werkzeugaufnahme
CN106536133B (zh) * 2014-04-22 2018-11-02 马科斯泰克消费者制品有限公司 用于螺丝刀及其类似物的快速连接夹头机构
JP6479388B2 (ja) * 2014-09-29 2019-03-06 Ntn株式会社 チャック構造

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3421811A1 (de) 1984-06-12 1985-12-12 Hilti Ag, Schaan Werkzeughalter fuer bohr- und meisselgeraete
US5558478A (en) * 1993-11-30 1996-09-24 Robert Bosch Gmbh Device for transferring a torque to a tool in a hand tool apparatus
US5709391A (en) * 1995-09-06 1998-01-20 Makita Corporation Bit mounting device
JP2000117662A (ja) * 1998-10-08 2000-04-25 Makita Corp 携帯工具のビット装着装置
DE10002749A1 (de) * 2000-01-22 2001-08-02 Bosch Gmbh Robert Handwerkzeugmaschine
US20010043841A1 (en) * 1999-11-15 2001-11-22 Wienhold James L. Locking quick-change chuck assembly
DE10001191C2 (de) 2000-01-14 2002-04-04 Bosch Gmbh Robert Handwerkzeugmaschine mit einer schlagend und/oder drehend antreibbaren Werkzeughalterung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3421811A1 (de) 1984-06-12 1985-12-12 Hilti Ag, Schaan Werkzeughalter fuer bohr- und meisselgeraete
US5558478A (en) * 1993-11-30 1996-09-24 Robert Bosch Gmbh Device for transferring a torque to a tool in a hand tool apparatus
US5709391A (en) * 1995-09-06 1998-01-20 Makita Corporation Bit mounting device
JP2000117662A (ja) * 1998-10-08 2000-04-25 Makita Corp 携帯工具のビット装着装置
US20010043841A1 (en) * 1999-11-15 2001-11-22 Wienhold James L. Locking quick-change chuck assembly
DE10001191C2 (de) 2000-01-14 2002-04-04 Bosch Gmbh Robert Handwerkzeugmaschine mit einer schlagend und/oder drehend antreibbaren Werkzeughalterung
DE10002749A1 (de) * 2000-01-22 2001-08-02 Bosch Gmbh Robert Handwerkzeugmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 07 29 September 2000 (2000-09-29) *

Also Published As

Publication number Publication date
CN100400242C (zh) 2008-07-09
DE10243288B4 (de) 2013-02-21
EP1542835B1 (fr) 2013-07-17
CN1652902A (zh) 2005-08-10
JP2005538858A (ja) 2005-12-22
DE10243288A1 (de) 2004-04-15
EP1542835A1 (fr) 2005-06-22

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