EP0584706A2 - Outil pour outils à main - Google Patents

Outil pour outils à main Download PDF

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Publication number
EP0584706A2
EP0584706A2 EP93113202A EP93113202A EP0584706A2 EP 0584706 A2 EP0584706 A2 EP 0584706A2 EP 93113202 A EP93113202 A EP 93113202A EP 93113202 A EP93113202 A EP 93113202A EP 0584706 A2 EP0584706 A2 EP 0584706A2
Authority
EP
European Patent Office
Prior art keywords
torque
groove
rotary driving
tool
shaft
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.)
Granted
Application number
EP93113202A
Other languages
German (de)
English (en)
Other versions
EP0584706B1 (fr
EP0584706A3 (en
Inventor
Hans BLÖCHLE
Karl Dr. Dipl.-Ing. Wanner
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 EP0584706A2 publication Critical patent/EP0584706A2/fr
Publication of EP0584706A3 publication Critical patent/EP0584706A3/de
Application granted granted Critical
Publication of EP0584706B1 publication Critical patent/EP0584706B1/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
    • 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
    • B25D2217/0034—Details of shank profiles
    • 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 for hand machine tools according to the preamble of the main claim.
  • the tool according to the invention with the characterizing features of claim 1 has the advantage that tools of this type can be used universally in almost all common tool holders while at the same time conserving torque on the tool.
  • either the cylindrical sections of the locking grooves or the rotary driving grooves themselves serve for torque transmission. Due to the asymmetrical arrangement of the rotary driving grooves with respect to the through the locking grooves and through the longitudinal axis of the tool shank center plane ensures that between the torque-transmitting flanks of the rotary driving grooves and the locking groove lying in front of it in the direction of rotation, sufficient material of the shank remains so that it does not break away under load even after considerable wear on the flanks of the groove.
  • FIG. 1 shows a longitudinal view of a tool shank
  • FIG. 2 shows an enlarged cross section through a tool shank and a tool holder with a viewing direction from the shank end to the tool head.
  • Figure 3 also shows in cross section the shaft for a second embodiment.
  • a tool shank 2 according to FIGS. 1 and 2 has a central central axis 3 extending in the longitudinal direction of the shank. Parallel extending to the central axis 3 on the circumference of the shaft 2 is a locking groove 4 closed at both axial ends. This can be supplemented or replaced if necessary by a diametrically opposite second locking groove 5, which is shown in broken lines in FIG. 2.
  • the locking groove 4 has a section 7 leading in the direction of rotation 6 of the shaft 2, the groove base 8 of which is formed by a section of a cylinder jacket. The section 7 ends where it is cut at right angles by the radius 9 through the central axis 3 of the shaft 2.
  • a rear section 10 can follow the mirror image of the radius 9, so that the radius 9 runs through the center of the locking groove 4.
  • the section 10 can also have another expedient shape, in particular be cut out further.
  • the radius 9, together with the central axis 3, spans a central plane 11 through the shaft 2, which intersects the bottom 8 of the locking groove 4 and / or 5 at the lowest point.
  • a rotary driving groove 12, 13 which is open towards the shaft end and which is of different depths and both have approximately radially extending, torque-transmitting flanks 14, 15.
  • This flank 14 of the somewhat flatter rotating driving groove 12 lies in the direction of rotation from the central plane 11, measured at an angle ⁇ of 126 °.
  • the flank 15 of the somewhat deeper rotary driving groove 13 lies in the same way - that is, in FIG. 2 from the central plane 11 downwards - measured at an angle ⁇ of 105 °. From the central plane 11, this results in an angle ⁇ 'of 54 ° for the flank 14 of the flatter groove 12, and an angle ⁇ ' of 75 ° for the flank 15 of the deeper groove 13, as seen from the direction of rotation 6.
  • the rotary driving grooves 12, 13 are delimited by non-torque-transmitting flanks 16, 17. These run preferentially likewise in the radial direction and are placed in the first embodiment such that the volumes and thus, with the same groove length, the cross-sectional areas of the rotary driving grooves 12, 13 are the same.
  • Volume means the volume of the material to be removed from the full shaft to create the groove. In FIG. 2, this leads to angles ⁇ , ⁇ of approximately 53 ° for the flanks 16 and 17. That is, the flanks 15 and 17 of the deeper rotary groove 13, which is preceded by the locking groove 4 in the direction of rotation, are around the central plane 11 by different angular amounts ⁇ , ⁇ 'offset.
  • the rear unloaded flanks 16, 17 are offset relative to the center plane 11 in the direction of rotation by a smaller angle ⁇ , ⁇ than the respectively associated torque-transmitting flank 14, 15 with their angle ⁇ ', ⁇ ' seen from the center plane 11 in the direction opposite to the direction of rotation .
  • the rotary driving grooves 12, 13 each have a convex, cylindrical section-shaped groove base 18, 19, which, however, can also have a different shape.
  • a schematically represented tool holder is designated, which has a radially movable, engaging in the groove 4, spherical or roller-shaped locking body 26.
  • a wider, flatter rotary driver 28 fills the rotary driver groove 12 and a narrower, longer rotary driver 29 is seated in the groove 13.
  • Both rotary drivers 28, 29 each lie flat on the associated torque-transmitting flank 14 or 15.
  • the locking body 26 also bears in a form-fitting manner on the section 7 of the locking groove 4, so that torques can also be transmitted here in a manner which is gentle on the material.
  • the tool shank 102 likewise has a central axis 103 and a locking groove 104.
  • the section 107, the radius 109 and the central plane 111 are defined as in the first exemplary embodiment.
  • a second locking groove 105 is in turn optionally provided.
  • a flatter rotary driving groove 112 has a torque-transmitting flank 114, which is offset from the central plane 111 in the direction of rotation 106 by an angle ⁇ of 126 °; the torque-transmitting flank 115 of a deeper rotary driving groove 113 is offset by an angle ⁇ of 105 °.
  • the rear flank 116 of the groove 112 is very far towards the locking groove 104 e.g. offset by an angle ⁇ of approx.
  • the rear flank 117 of the groove 113 is also e.g. offset by an angle ⁇ of approximately 40 ° in the direction of the locking groove 105, the flanks 116 and 117 not having to be opposite one another in mirror image. That is, the flanks 114 to 117 are offset by different angles ⁇ , ⁇ , ⁇ , ⁇ and also by different angular amounts with respect to the central plane 111.
  • the groove base 119 is shown flat in FIG. 3, but it can also be convex.
  • the shaft sections 20, 22 extend approximately over an angle of at least 30 ° or approximately 45 °.
  • the angular dimensioning of the torque-transmitting flanks includes slight deviations of two to three degrees.
  • the rotary driving can also take place only via one or two locking grooves or additionally via one of the rotary driving grooves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Jigs For Machine Tools (AREA)
EP19930113202 1992-08-22 1993-08-18 Outil pour outils à main Expired - Lifetime EP0584706B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4227949 1992-08-22
DE19924227949 DE4227949A1 (de) 1992-08-22 1992-08-22 Werkzeug für Handwerkzeugmaschinen

Publications (3)

Publication Number Publication Date
EP0584706A2 true EP0584706A2 (fr) 1994-03-02
EP0584706A3 EP0584706A3 (en) 1994-08-10
EP0584706B1 EP0584706B1 (fr) 1998-12-09

Family

ID=6466214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930113202 Expired - Lifetime EP0584706B1 (fr) 1992-08-22 1993-08-18 Outil pour outils à main

Country Status (3)

Country Link
EP (1) EP0584706B1 (fr)
DE (2) DE4227949A1 (fr)
DK (1) DK0584706T3 (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
EP0955131A1 (fr) 1998-05-04 1999-11-10 HILTI Aktiengesellschaft Outil à machines-outils à main
EP1535704A1 (fr) * 2003-11-26 2005-06-01 HILTI Aktiengesellschaft Porte-outil pour un outil rotatif à percussion

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPP053097A0 (en) * 1997-11-26 1997-12-18 Ramset Fasteners (Aust.) Pty. Limited Drill bits and holders therefor
DE10357380A1 (de) * 2003-12-05 2005-06-30 Hilti Ag Einsteckende für ein drehendes und/oder schlagendes Werkzeug
DE102004026850A1 (de) * 2004-06-02 2005-12-29 Hilti Ag Einsteckende für ein drehendes und/oder schlagendes Werkzeug

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811677A1 (de) * 1978-03-17 1979-09-20 Westa Werkzeugbau Einrichtung zur aufnahme eines gesteinsbohrers im bohrfutter einer drehschlagbohrmaschine
DE3745046C2 (de) * 1987-05-20 1996-07-25 Bosch Gmbh Robert Werkzeugaufnahme einer Handwerkzeugmaschine mit verdrehsicher einsetzbarem Werkzeug
DE3941646A1 (de) * 1989-12-16 1991-06-20 Heller Werkzeug Gmbh Geb Werkzeug zum schlagbohren und werkzeugaufnahme fuer schlagbohrende werkzeuge
DE4137120A1 (de) * 1991-11-12 1993-05-13 Hilti Ag Werkzeug zum schlagbohren und werkzeugaufnahme fuer schlagbohrende werkzeuge
DE4200643A1 (de) * 1992-01-13 1993-07-15 Hilti Ag Werkzeug zum schlagbohren und meisseln und werkzeugaufnahme fuer diese werkzeuge

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
EP0955131A1 (fr) 1998-05-04 1999-11-10 HILTI Aktiengesellschaft Outil à machines-outils à main
EP1535704A1 (fr) * 2003-11-26 2005-06-01 HILTI Aktiengesellschaft Porte-outil pour un outil rotatif à percussion
US7258350B2 (en) 2003-11-26 2007-08-21 Hilti Aktiengesellschaft Chuck for receiving a rotary-percussion tool
CN100418706C (zh) * 2003-11-26 2008-09-17 希尔蒂股份公司 用于旋转和冲击工具的工具安装座

Also Published As

Publication number Publication date
DE59309203D1 (de) 1999-01-21
DE4227949A1 (de) 1994-02-24
DK0584706T3 (da) 1999-08-16
EP0584706B1 (fr) 1998-12-09
EP0584706A3 (en) 1994-08-10

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