EP0476387A1 - Douille d'entraînement - Google Patents

Douille d'entraînement Download PDF

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Publication number
EP0476387A1
EP0476387A1 EP91114512A EP91114512A EP0476387A1 EP 0476387 A1 EP0476387 A1 EP 0476387A1 EP 91114512 A EP91114512 A EP 91114512A EP 91114512 A EP91114512 A EP 91114512A EP 0476387 A1 EP0476387 A1 EP 0476387A1
Authority
EP
European Patent Office
Prior art keywords
driving
driving sleeve
sleeve
sleeve according
tool
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.)
Ceased
Application number
EP91114512A
Other languages
German (de)
English (en)
Inventor
Wilbert Dipl.-Ing. Reibetanz
Karl Dr.-Ing. Wanner
Otto Baumann
Rolf Dipl.-Ing. Müller
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 EP0476387A1 publication Critical patent/EP0476387A1/fr
Ceased 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
    • B25D17/08—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
    • 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
    • B25D2217/0057—Details related to cleaning or cooling the tool or workpiece
    • B25D2217/0065—Use of dust covers
    • B25D2217/0069—Protecting chucks against entering of chip dust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/231—Sleeve details

Definitions

  • the invention is based on a driving sleeve according to the preamble of claim 1.
  • Such sleeves are used for clamping groove shank tools in common drill chucks with adjustable jaws and are known for example from DE-OS 34 43 138.
  • the known adapter sleeve is composed of three parts, the actual sleeve, a movable locking body, and a wire pin holding the locking element.
  • the sleeve itself has a complicated shape that can only be produced by complex manufacturing steps such as turning, drilling, milling, seizing, (manual) assembly, etc.
  • the driving sleeve according to the invention with the characterizing features of claim 1 has the advantage that it can be easily produced from one piece in a few steps. A punching and a bending process on a single piece of sheet metal or alternatively a kneading or extrusion process on a pipe piece is sufficient.
  • the driving sleeve according to the invention can easily be clamped in any drill chuck with a jaw width of at least 13 mm and any number of jaws without changing the chuck.
  • the groove shank tool is held in the sleeve axially movable even in the clamped state and secured against sliding out.
  • the sleeve can also be easily removed from the tool again and thus enables the alternate use of grooved shank tools both in specially adapted tool holders and in conventional drill chucks.
  • Figure 1 shows a drill chuck into which a groove shank tool with a driving sleeve is inserted
  • Figure 2 shows in a first embodiment the development of a driving sleeve
  • Figure 3 shows a section along line III-III of Figure 2
  • Figure 4 shows a second embodiment in cross section .
  • a known chuck 1 consists of a base body 2, in which three chuck jaws 3 are guided.
  • the chuck jaws 3 can be advanced by means of an adjusting ring 4 in the direction of a receiving bore 5 for a tool shaft 6 to be inserted.
  • the chuck is surrounded by a dust cap 7.
  • a driving sleeve 11 consisting of a one-piece tube part 10.
  • This has at least one inwardly directed tongue 12, which preferably engages in a closed groove 13 of the tool shank 6.
  • the axial extent of the tongue 12 is less than the length of the groove 13, so that the tool shank 6 remains axially movable with respect to the driving sleeve 11.
  • the inside diameter of the driving sleeve 11 is somewhat larger than the outside diameter 10 of the tool shank 6 used, in order not to hinder its axial mobility.
  • the tongue 12 serves as a locking element between the tool shank and the driving sleeve 11 and is designed to be resilient so that the parts can be assembled and separated.
  • the tool shank 6 preferably has two driving grooves 15 open diametrically opposite to the shank end.
  • Two inward projections 16 engage in these grooves 15, which are preferably formed from the wall of the tubular part 10 by punching or extrusion.
  • the projections 16 are formed in pairs one behind the other, so that their axial extension is shorter than the length of the contact surfaces of the chuck jaws 3 on the sleeve 11. This prevents the chuck jaws from engaging in the protrusions 16, which appear as recesses from the outside, and become one eccentric clamping of the sleeve 11 in the drill chuck 1.
  • FIG 2 the development of a driving sleeve 11 is shown, which is formed from a rolled sheet metal part 18.
  • the punched-out and curved tongue 12 is visible approximately in the middle of the sheet metal part.
  • the sheet metal part 18 is rolled up during its manufacture so that its edges 19 and 20 abut each other.
  • one of the edges 20 has tabs 21 which engage in indentations 22 on the other edge 19. In this way, the two abutting edges 19, 20 are latched together.
  • the sheet metal part 18 can be punched out in a single operation and rolled into a sleeve in a subsequent simple bending process.
  • the tongue 12 and the projections 16 are shown again in a sectional drawing.
  • an extruded driving sleeve 11 is shown in FIG. 4, which is formed from a smooth-walled tube piece 24.
  • the inward projections 16 are visible.
  • the projections 16 'of the second exemplary embodiment only protrude inward due to the manufacturing process and do not form any depressions on the outer circumference of the driving sleeve.
  • This second embodiment of the driving sleeve 11 is also easy and inexpensive to produce by extrusion or kneading from a simple one-piece piece of pipe.
  • the driving sleeve 11 is connected to a tool shank 6 by simply plugging it on.
  • the resilient tongue 12 retreats to finally snap back into the closed groove 13 of the tool shank.
  • the tool shank together with the driving sleeve 11 is then inserted into a drill chuck and clamped there by feeding the chuck jaws 3.
  • the wall of the driving sleeve 3 is dimensioned so small that, with an inner diameter of about 10 mm, it can easily be inserted into a drill chuck with a 13 mm span fits in.
  • the tool shank 6 After tensioning the sleeve 11 in the drill chuck 1, the tool shank 6 remains axially movable relative to the drill chuck, so that an impacting body acting on the end of the tool shank 6 can transmit its energy unhindered to the tool.
  • an even higher efficiency is achieved.
  • the tool cannot fall out of the drill chuck and the axial idle travel required with conventional rotary hammers is not impaired. Since no parts of the sleeve 11 protrude beyond its outer circumference, the driving sleeve 11 can be clamped in any rotational position without any problems and removed from the drill chuck 1 again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
EP91114512A 1990-09-14 1991-08-29 Douille d'entraînement Ceased EP0476387A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9013083U DE9013083U1 (fr) 1990-09-14 1990-09-14
DE9013083U 1990-09-14

Publications (1)

Publication Number Publication Date
EP0476387A1 true EP0476387A1 (fr) 1992-03-25

Family

ID=6857503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91114512A Ceased EP0476387A1 (fr) 1990-09-14 1991-08-29 Douille d'entraînement

Country Status (2)

Country Link
EP (1) EP0476387A1 (fr)
DE (1) DE9013083U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0742082A1 (fr) * 1995-05-04 1996-11-13 HILTI Aktiengesellschaft Dispositif de transmission de couple pour des outils à main
WO2002020224A1 (fr) * 2000-09-08 2002-03-14 Robert Bosch Gmbh Porte-outil pour une machine-outil
EP3081340A1 (fr) * 2015-04-13 2016-10-19 HILTI Aktiengesellschaft Machine-outil portative

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273601A (en) * 1966-09-20 Stamped tubular product and method of making the same
DE2504505A1 (de) * 1975-02-04 1976-08-05 Schaeffler Ohg Industriewerk Verfahren zur herstellung einer aussenhuelse fuer einen klemmrollenfreilauf
EP0141903A1 (fr) * 1983-09-03 1985-05-22 Metabowerke GmbH & Co. Perceuse à percussion
DE3416964A1 (de) * 1984-05-08 1985-11-21 Günter Horst 7927 Sontheim Röhm Spannfutter fuer ein werkzeug, insbes. zum schlagbohren
DE3443138A1 (de) * 1984-11-27 1986-06-05 Metabowerke GmbH & Co, 7440 Nürtingen Werkzeughalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273601A (en) * 1966-09-20 Stamped tubular product and method of making the same
DE2504505A1 (de) * 1975-02-04 1976-08-05 Schaeffler Ohg Industriewerk Verfahren zur herstellung einer aussenhuelse fuer einen klemmrollenfreilauf
EP0141903A1 (fr) * 1983-09-03 1985-05-22 Metabowerke GmbH & Co. Perceuse à percussion
DE3416964A1 (de) * 1984-05-08 1985-11-21 Günter Horst 7927 Sontheim Röhm Spannfutter fuer ein werkzeug, insbes. zum schlagbohren
DE3443138A1 (de) * 1984-11-27 1986-06-05 Metabowerke GmbH & Co, 7440 Nürtingen Werkzeughalter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0742082A1 (fr) * 1995-05-04 1996-11-13 HILTI Aktiengesellschaft Dispositif de transmission de couple pour des outils à main
US5704744A (en) * 1995-05-04 1998-01-06 Hilti Aktiengeschaft Arrangement for transmitting torque in a manually operated tool
WO2002020224A1 (fr) * 2000-09-08 2002-03-14 Robert Bosch Gmbh Porte-outil pour une machine-outil
US6854740B2 (en) 2000-09-08 2005-02-15 Robert Bosch Gmbh Tool mounting for a hand machine tool
CN1298502C (zh) * 2000-09-08 2007-02-07 罗伯特·博施有限公司 手持式工具机的刀具夹具
EP3081340A1 (fr) * 2015-04-13 2016-10-19 HILTI Aktiengesellschaft Machine-outil portative

Also Published As

Publication number Publication date
DE9013083U1 (fr) 1992-01-16

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