EP2283976A2 - Dispositif de retenue d'outil pour une perceuse - Google Patents

Dispositif de retenue d'outil pour une perceuse Download PDF

Info

Publication number
EP2283976A2
EP2283976A2 EP10167126A EP10167126A EP2283976A2 EP 2283976 A2 EP2283976 A2 EP 2283976A2 EP 10167126 A EP10167126 A EP 10167126A EP 10167126 A EP10167126 A EP 10167126A EP 2283976 A2 EP2283976 A2 EP 2283976A2
Authority
EP
European Patent Office
Prior art keywords
adapter
tool
tool holder
plug
holding device
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Withdrawn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
EP10167126A
Other languages
German (de)
English (en)
Other versions
EP2283976A3 (fr
Inventor
Juergen Lennartz
Thomas Bernhardt
Andreas Schlegel
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 EP2283976A2 publication Critical patent/EP2283976A2/fr
Publication of EP2283976A3 publication Critical patent/EP2283976A3/fr
Withdrawn legal-status Critical Current

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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
    • B25D17/005—Attachments or adapters placed between tool and hammer
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0038—Locking members of special shape
    • B25D2217/0042—Ball-shaped locking members

Definitions

  • the invention relates to a tool holding device for a hammer drill according to the preamble of claim 1.
  • a hammer drill which has a rotatably arranged hammer tube for receiving a rotary or insert tool, which is acted upon axially frontally by a firing pin.
  • the inserted into the hammer tube insert tool is axially locked by means of a locking ball which protrudes through a recess in the wall of the hammer tube and is in engagement with a groove on the shaft of the insert tool.
  • various types of tools can be accommodated in the hammer tube, for example a screwdriver bit, a hex drill or an SDS drill, provided that these inserts have similar shank parts.
  • the invention is based on the object to form a rotary hammer versatile in design as compact as possible.
  • the tool holder is designed as a receiving sleeve or hammer tube into which the insert tool can be inserted.
  • a plug-in adapter is releasably inserted into the tool holder, wherein a tool holder is in the plug adapter at least over part of its axial length in the inserted state within the tool holder.
  • the tool holder protrudes over at least a third, possibly over the greater part of its axial length in the inserted state in the tool holder and is located in particular within the hammer tube, so that the tool inserted into the tool holder protrudes into the hammer tube.
  • the usability of the hammer drill is extended, the axial length of the hammer drill is not or at least not significantly increased even when plugged adapter.
  • the adapter shaft of the plug-in adapter which projects into the tool holder, has locking elements which interact with corresponding locking elements in the tool holder.
  • To avoid contact with the impact element of the adapter shaft has an axially shortened length, so that even when switched Schlagbohr réelle the striking element does not come into contact with the plug-in adapter or to be included in the plug-in adapter insert.
  • the plug-in adapter is provided with locking elements, which are designed to correspond to the locking elements located in the tool holder, a secure locking of the adapter in the tool holder is possible.
  • the locking elements on the plug-in adapter correspond to those of insert tools, which are used directly in the tool holder and which are in particular SDS systems.
  • the tool holder in the plug-in adapter is preferably designed for receiving screwdriver bits.
  • the inner cross section of the tool holder in the plug-in adapter is advantageously as a polygon, in particular as a hexagon executed in order to produce in the circumferential or rotational direction a positive connection between the inserted insert tool and the plug-in adapter.
  • the plug-in adapter designed in the manner described above can be produced in a simple manner and connected to the tool holding device of the hammer drill.
  • additional types of insert tools can be used.
  • the tool holder in the hammer drill is designed in particular for receiving SDS drills, while the tool holder in the plug adapter is designed to hold screwdriver bits.
  • the locking elements on the inside of the tool holder in the hammer drill advantageously have a radially inwardly uplifting web, wherein the corresponding locking element is formed on the outside of the adapter shaft as a groove for receiving the web. This corresponds to the execution of an SDS profile.
  • the axial length of the adapter shaft is dimensioned such that the adapter shaft does not extend in the inserted state on the side facing away from the insertion via a torque take-off element, which is designed for example as a longitudinal web, going out in the tool holder.
  • a torque take-off element which is designed for example as a longitudinal web, going out in the tool holder.
  • the lateral surface of the adapter shaft preferably has an incision which serves to receive a locking ball, which is arranged in the hammer drill.
  • the locking ball protrudes in particular through a recess in the wall of the tool holder, which is designed as a hammer tube, wherein the axial locking of the plug-in adapter is achieved in that the locking ball lies in the incision of the adapter shaft and at the same time is in the recess in the wall of the hammer tube ,
  • the plug-in adapter may have a radially protruding collar which limits the insertion depth of the plug-in adapter into the tool holder.
  • a protective cap in particular made of rubber, may rest on the axial outer side of the protruding collar of the plug-in adapter.
  • the tool holder in the plug-in adapter extends in the inserted state of the adapter advantageously over the greater part of its axial length within the tool holder in order to keep the axial projection over the end face of the tool holder low.
  • a shortened axial length of the plug-in adapter is achieved, in particular in the protruding part of the plug-in adapter, which provides for improved precision in tool machining during operation of the machine tool.
  • the adapter shaft in this case consists of two sections, of which a first, the impact element adjacent portion carrier of the locking elements and the second, the free end of the tool holder adjacent portion has the tool holder in the form of a recess.
  • the locking elements on the adapter shaft are preferably not located on the part of the adapter shaft into which the tool holder is inserted.
  • FIG. 1 the front part of an electromotive operated hammer drill 1 is shown, which has a tool holder 2 with a rotatably driven hammer tube 3 located therein for receiving an insert tool 4 only hinted.
  • the insert tool 4 is inserted in the direction of the longitudinal axis 5 in the hammer tube 3 and locked there axially by means of a locking ball 6.
  • the hammer function which can be switched on and off is realized by means of a firing pin 7, which is acted upon axially by a racket 8, wherein the end face of the firing pin 7 comes into contact with the facing end side of the insert tool 4.
  • Fig. 2 is the front portion of the tool holder forming the hammer tube 3 shown.
  • a radially inwardly elevating web 9 is formed, which forms an elongated body extending in the axial direction and has the function of a torque-locking element, which cooperates with a corresponding locking element on the lateral surface of the insert tool.
  • a positive connection between the hammer tube 3 and the inserted insert tool is achieved in circumferential or rotational direction.
  • the corresponding locking element is designed as a longitudinal groove.
  • the hammer tube 3 designed in this way serves to receive SDS tools.
  • a recess 10 is introduced into which the locking ball 6 (FIG. Fig. 1 ) protrudes.
  • Fig. 3 the hammer tube 3 is shown with inserted plug-in adapter 11.
  • the plug-in adapter 11 consists of an adapter shaft 12, which protrudes into the hammer tube 3, and a radially enlarged collar 13.
  • a recess is introduced at the axial end face with the collar 13, which forms a tool holder 14 for receiving an insert tool 15 ,
  • the insertion tool 15 is in particular a screwdriver bit.
  • the tool holder 14 has, as Fig. 4 to take a hexagonal inner cross-section, whereas the outer cross-section is made round.
  • the adapter shaft 12 On the side facing away from the collar 13, the adapter shaft 12 on locking elements, which correspond to the web 9 on the inside of the hammer tube 3.
  • the locking elements on the lateral surface of the adapter shaft 12 are grooves extending in the axial longitudinal direction.
  • the adapter shaft 12 In the lateral surface of the adapter shaft 12 also has an incision 16 is formed, which corresponds to the recess 10 in the wall of the hammer tube 3 and in which the locking ball 6 protrudes for axial locking of the plug-in adapter in the hammer tube.
  • the recess 16 is located as well as the locking elements, which correspond to the web 9, on the axially rear, the collar 13 facing away portion of the adapter shaft axially outside the tool holder 14.
  • the wall of the tool holder 14 is thus free of locking elements and notches.
  • a protective cap 17 is placed on the hammer tube 3, which is preferably designed as a rubber cap.
  • the collar 13 of the plug-in adapter 11 adjoins the protective cap 17, which thus limits the insertion depth of the adapter shaft 12 on the hammer tube 3.
  • the dimensions with respect to the axial length of the adapter shaft 12 and the cap 17 are coordinated so that the collar 13 facing away from the axial end face 12a of the adapter shaft 12 in the inserted state does not extend beyond the locking element 9 on the inner wall of the hammer tube 3 out.
  • the axial insertion depth of the plug-in adapter 11 can be limited in other ways, for example, by projections and lugs on the hammer tube 3 or any other component of the hammer drill.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP10167126A 2009-08-14 2010-06-24 Dispositif de retenue d'outil pour une perceuse Withdrawn EP2283976A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910028546 DE102009028546A1 (de) 2009-08-14 2009-08-14 Werkzeughalteeinrichtung für einen Bohrhammer

Publications (2)

Publication Number Publication Date
EP2283976A2 true EP2283976A2 (fr) 2011-02-16
EP2283976A3 EP2283976A3 (fr) 2012-08-15

Family

ID=43086414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10167126A Withdrawn EP2283976A3 (fr) 2009-08-14 2010-06-24 Dispositif de retenue d'outil pour une perceuse

Country Status (3)

Country Link
EP (1) EP2283976A3 (fr)
CN (1) CN101992454B (fr)
DE (1) DE102009028546A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102922492A (zh) * 2012-10-08 2013-02-13 方大控股有限公司 一种可转动的凿子夹套总成
EP2602063A1 (fr) * 2011-12-10 2013-06-12 Santo Pizzuto Disque d'écartement pour une perceuse à percussion dotée d'un système SDS-max

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006016804A1 (de) 2006-04-10 2007-10-11 Robert Bosch Gmbh Werkzeughalterung für einen Bohrhammer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2640767A1 (de) * 1976-09-10 1978-03-16 Bosch Gmbh Robert Werkzeughalter an einer handwerkzeugmaschine
US4818157A (en) * 1986-12-31 1989-04-04 James E. Scapillato Quick-change adapter and tools for use with the adapter
DE10044387A1 (de) * 2000-09-08 2002-04-04 Bosch Gmbh Robert Werkzeughalterung für eine Handwerkzeugmaschine
US6929266B2 (en) * 2002-06-18 2005-08-16 Black & Decker Inc. Bit holder
DE102004030430A1 (de) * 2004-06-24 2006-01-12 Hilti Ag Werkzeug mit Einsteckende
DE102004042735A1 (de) * 2004-09-03 2006-03-09 Robert Bosch Gmbh Werkzeugaufnahme, Adapter und System mit einer Werkzeugaufnahme und einem Adapter
JP4552843B2 (ja) * 2005-12-09 2010-09-29 パナソニック電工株式会社 打撃工具用アダプター
US8262098B2 (en) * 2008-02-05 2012-09-11 Robert Bosch Gmbh Rotary tool system with centering member

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006016804A1 (de) 2006-04-10 2007-10-11 Robert Bosch Gmbh Werkzeughalterung für einen Bohrhammer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2602063A1 (fr) * 2011-12-10 2013-06-12 Santo Pizzuto Disque d'écartement pour une perceuse à percussion dotée d'un système SDS-max
CN102922492A (zh) * 2012-10-08 2013-02-13 方大控股有限公司 一种可转动的凿子夹套总成

Also Published As

Publication number Publication date
DE102009028546A1 (de) 2011-02-17
CN101992454B (zh) 2016-07-06
CN101992454A (zh) 2011-03-30
EP2283976A3 (fr) 2012-08-15

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