EP0955131B1 - Werkzeug für Handwerkzeugmaschinen - Google Patents

Werkzeug für Handwerkzeugmaschinen Download PDF

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Publication number
EP0955131B1
EP0955131B1 EP99810215A EP99810215A EP0955131B1 EP 0955131 B1 EP0955131 B1 EP 0955131B1 EP 99810215 A EP99810215 A EP 99810215A EP 99810215 A EP99810215 A EP 99810215A EP 0955131 B1 EP0955131 B1 EP 0955131B1
Authority
EP
European Patent Office
Prior art keywords
tool
shaft
locking
tool according
rotary pickup
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
EP99810215A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0955131A1 (de
Inventor
Hans Werner Bongers-Ambrosius
Werner Kleine
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP0955131A1 publication Critical patent/EP0955131A1/de
Application granted granted Critical
Publication of EP0955131B1 publication Critical patent/EP0955131B1/de
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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion
    • Y10T279/17076—Spreading elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/907—Tool or Tool with support including detailed shank

Definitions

  • the invention relates to a tool for hand tools according to the Preamble of claim 1.
  • DE4338818A1 has a tool shank of a diameter of 16 - 20 mm in a Einspann Scheme at least one locking recess and at least an open to the rear shaft end rotary drive groove with a greater depth 4 mm up.
  • Such a weakened residual cross section in the clamping area has neither a sufficient breaking strength on still can a big single striking energy be transmitted optimally.
  • the object of the present invention is a tool for a hand tool to create, whose rotary driving grooves and locking recesses in terms of torque transmission and retention of the tool are optimized. It should be a sufficiently large, ungeschwownter remaining cross section of Keep tool shank for the big single hitting power of the modern ones Axial impact-assisted hand tool machines is optimally transferable and that Tool has a sufficiently large breaking strength.
  • the solution of this Tasks consists in a tool for hand tool machines, which in the having characteristic features of the patent claim 1.
  • the Tool shank of the inventive tool has in a clamping area at least one locking recess and at least one to the rear Shank end towards open rotary drive groove.
  • the tool shank possesses in Clamping area has a diameter equal to or greater than 12 mm.
  • At least a locking recess and at least one rotary driving groove have a depth, which is equal to or greater than 2.5 mm.
  • the junction edges of at least one Locking recess and at least one rotary driving groove on the circumference of the Tool shank close each opening angle, the same or greater than 50 ° are.
  • the diameter of the tool shank in the clamping area ensures in conjunction with the depth of the locking recess and the rotary driving one sufficient large residual cross section of the tool, which for an optimized energy throughput of the axial blows by the tool is required.
  • the greatest depth of Locking groove and the rotary driving groove is advantageously less than 3.5 mm.
  • the Aperture angle is defined as the angle between those radii that the Einmündungskanten the side surfaces of the locking recess or the Connect the rotary drive groove in the circumference of the tool shaft with its axis. Any chasms of the transitional areas remain out of consideration.
  • At least one of the locking recesses and at least one of the Rotary drive has an opening angle that is equal to or greater than 50 °.
  • a second locking recess or a further rotary driving groove can also have a smaller opening angle.
  • the depth and the opening angle of the rotary driving groove ensure sufficient large rotary drive surface, which is responsible for the transmission of torque from Rotary driver of the tool holder responsible for the clamped tool is.
  • a preferred diameter of the tool shank in the clamping area of About 14 mm, in particular, proves a depth of the rotary driving groove of about 2.6 mm as advantageous.
  • the opening angle of the locking recess and the Drehmit shakingut are preferably chosen such that their smallest angular distance is greater than 15 ° and preferably at least 20 °. This leaves you between the locking recess and the rotary driving groove a sufficiently wider, unguarded material web, which is beneficial to the life of the tool effect.
  • the depths of the locking recess and the rotary driving groove dimensioned so that the next-axis areas each have a radial distance from the Shaft of the shaft whose ratio to the radius of the shaft in Clamping range is less than about 0.65.
  • the locking recess and the rotary driving groove at the junction edges in the circumference of the Tool shank opening angles which are within ⁇ 10 °, preferably ⁇ 6 °, agree with each other.
  • the locking recess and the rotary driving groove have approximately the same opening angle, is the clamping area of the tool shaft each over the same angular range of its circumference weakened. This leaves a sufficient even with smaller shank diameters large, ungeschwumbleter shank cross section obtained.
  • two locking recesses are provided are preferably diametrically opposed to each other.
  • the Locking recesses at the junction edges in the circumference of the tool shank the same opening angle.
  • the distance of the axially adjacent areas of the locking recesses to Shank diameter has a ratio of between about 0.6 to 0.7.
  • the locking recess preferably has the profile of a cross-section Circular arc on. Especially at two diametrically opposite Locking recesses, it proves to be the remaining cross section of the Clamping range of the tool shank advantageous if the radius of the arcuate locking recesses to the radius of the tool shank in Clamping range in the ratio of about 0.54 to about 0.6 is.
  • the tool shank two diametrically opposed rotary driving grooves are provided.
  • the two have Rotary drive grooves on the same opening angle.
  • the Opening angle of all rotary driving grooves and the locking recesses equal or greater than 50 °.
  • the inventive tool has a Einmündungskante the rotational drive groove or the locking recess to the Junction edge of the following in the circumferential direction locking recess or the rotary driving a smallest angular distance of about 90 °.
  • a rotationally driven tool in particular a drilling and / or chiseling tool, so come the rotary driver and the locking members in the tool holder the hand tool approximately at the same time in contact with the side surfaces of the Locking recess and the rotary driving groove. This will also contribute to the Locking recesses to some extent for torque transmission at and the rotary driving grooves are spared, which is beneficial to the life of the tool.
  • FIGS. 1-4 the clamping area of the shaft of a drilling and / or chiseling tool is shown shown in the tool holder of a hand tool, for example, a drilling and / or chiseling device of the Applicant, can be inserted.
  • the Tool shank 2 has a diameter t in the clamping area 3 which is the same as or bigger than 12 mm.
  • the diameter t is about 14 mm.
  • Fig. 1-3 show a cross section of the tool;
  • Fig. 4 shows a view of an embodiment of the inventive tool.
  • the illustrated in Fig. 1 embodiment of the tool carries the overall Reference numeral 1.
  • the illustration shows a cross section of the clamping region 3 of Shaft 2 of the tool 1.
  • An axially closed locking recess is 4 designated.
  • the preferably circular arc-shaped locking recess 4 opens with Edges 8 in the circumference of the shaft 2.
  • the radii from the axis A of the shaft 2 to the junction edges 8 of the locking recess 4 close an opening angle a, which is denoted by ⁇ .
  • the opening angle is equal to or greater than 50 °.
  • the depth v of the locking recess 4 is about 2.5 mm.
  • the axial closed locking recess 4 opposite side surface 5 of the Clamping area 3 is flattened, so that the tool 1 in tool holders can be inserted with two opposing locking bodies.
  • An open towards the shaft end open rotational drive groove 6 is to arranged substantially offset by about 90 ° relative to the locking recess 4.
  • the Rotary driving groove 6 is substantially trapezoidal in cross section.
  • the side surfaces the rotary driving groove 6 open with edges 9 in the circumference of the shaft. Which differ from the axis A to the junction edges 9 extending radii close one Opening angle ⁇ equal to or greater than 50 °. According to the illustrated Embodiment, the opening angle ⁇ , ⁇ of the locking recess 4 and the Drehit Spotifynut 6 approximately equal.
  • the term “approximate equal to” an angle difference of up to about ⁇ 10 °, preferably ⁇ 6 °, with a.
  • the depth d of the rotary driving groove is greater than 2.5 mm and is at one Tool shank diameter t of about 14 mm, preferably about 2.6 mm.
  • the the Rotary driving groove 6 opposite side surface 7 of the shaft 2 is flattened designed so that the tool can also be used in tool holders, the two Have opposite rotational driving strips.
  • the illustrated in Fig. 2 embodiment of the inventive drilling and / or Chisel tool is designated overall by 20.
  • the shaft bears the reference numeral 22, and the clamping area shown in Qerites is denoted by 23.
  • the Shaft 22 on two locking recesses 24 which are diametrically opposite each other lie and are arranged on both sides of a rotary driving groove 26.
  • the rotary driving groove 26 opposite side 27 of the Shaft 22 is flattened so that the tool 20 in a tool holder with two opposing rotary driving strips can be inserted.
  • the each other diametrically opposed locking recesses 24 have the same Opening angle ⁇ on.
  • the opening angle of the locking recesses 24 and the Rotational drive groove 26 are equal to or greater than 50 °. Preferably, they are again approximately the same size.
  • the distance a of the achsnite range of the rotary driving groove 26 has the radius t / 2 of the shaft 22 a ratio whose value is less than .65.
  • the distance s of the achs foster areas of each other opposite locking recesses 24 is the diameter t of the Shaft 22 at the clamping portion 23 in a ratio of between about 0.6 to 0.7 is.
  • the locking recesses 24 preferably have a circular arc Cross-section on. The radius r of the circular arc stands to the diameter of the stem 22 at the clamping area in a ratio of about 0.54 to about 0.6.
  • Fig. 3 and Fig. 4 is a further embodiment of the inventive Tool shown and provided with the reference numeral 30 throughout.
  • the Clamping portion 33 of the shaft 32 is provided with two locking recesses 34 and two Rotary drive grooves 36 are provided, which are diametrically opposed to each other.
  • the diametrically opposed rotary driving grooves 36 have the same Opening angle ⁇ , which are approximately the same size as the opening angle of the Locking recesses 34.
  • the junction edge 8 of the rotary driving groove 36 the from the following along the circumference of the shaft 32 locking recess 34th has turned away, has of the mutually associated junction edge 9 of the Locking recess 34 an angular distance, which is preferably about 90 °.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Surgical Instruments (AREA)
  • Portable Power Tools In General (AREA)
EP99810215A 1998-05-04 1999-03-11 Werkzeug für Handwerkzeugmaschinen Expired - Lifetime EP0955131B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19819631A DE19819631A1 (de) 1998-05-04 1998-05-04 Werkzeug für Handwerkzeugmaschinen
DE19819631 1998-05-04

Publications (2)

Publication Number Publication Date
EP0955131A1 EP0955131A1 (de) 1999-11-10
EP0955131B1 true EP0955131B1 (de) 2005-02-09

Family

ID=7866478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99810215A Expired - Lifetime EP0955131B1 (de) 1998-05-04 1999-03-11 Werkzeug für Handwerkzeugmaschinen

Country Status (6)

Country Link
US (1) US6174112B1 (ja)
EP (1) EP0955131B1 (ja)
JP (1) JPH11333759A (ja)
CN (1) CN1096337C (ja)
DE (2) DE19819631A1 (ja)
DK (1) DK0955131T3 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10241054A1 (de) * 2002-09-05 2004-03-18 Robert Bosch Gmbh Werkzeug und Werkzeughalter für eine Handwerkzeugmaschine
GB2393931A (en) * 2002-10-10 2004-04-14 Black & Decker Inc Tool for a rotary hammer
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
US20120074659A1 (en) 2010-09-29 2012-03-29 Henry H. Hamilton Tool assembly and related methods

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1752155A1 (de) * 1968-04-10 1971-05-13 Hilti Ag Werkzeug fuer Werkzeughalter fuer Bohrhaemmer
DE2650134A1 (de) * 1976-10-30 1978-05-11 Bosch Gmbh Robert Werkzeugeinsteckschaft
GB8425400D0 (en) * 1984-10-08 1984-11-14 Dom Holdings Plc Tool
DE3941646A1 (de) 1989-12-16 1991-06-20 Heller Werkzeug Gmbh Geb Werkzeug zum schlagbohren und werkzeugaufnahme fuer schlagbohrende werkzeuge
DE4105414A1 (de) 1991-02-21 1992-08-27 Hilti Ag Werkzeug und werkzeughalter fuer handwerkzeuggeraete
DE4210451A1 (de) * 1992-03-30 1993-10-07 Plica Werkzeugfabrik Ag Mollis Einrichtung zur Drehmomentübertragung
DE4227949A1 (de) 1992-08-22 1994-02-24 Bosch Gmbh Robert Werkzeug für Handwerkzeugmaschinen
DE4303545A1 (de) 1993-02-08 1994-08-11 Hawera Probst Kg Hartmetall Einrichtung an Handwerkzeugmaschinen zur Drehmomentübertragung
DE4338818A1 (de) * 1993-11-13 1995-05-18 Hawera Probst Kg Hartmetall Einrichtung an Handwerkzeugmaschinen zur Drehmomentübertragung
DE9319009U1 (de) 1993-12-10 1994-02-03 Plica Werkzeugfabrik Ag, Mollis Dreischneidenbohrer
US5421628A (en) * 1994-01-28 1995-06-06 Nahm; Hyong K. Water-repellent shield for automobile side mirror

Also Published As

Publication number Publication date
DE19819631A1 (de) 1999-11-11
US6174112B1 (en) 2001-01-16
DE59911573D1 (de) 2005-03-17
EP0955131A1 (de) 1999-11-10
JPH11333759A (ja) 1999-12-07
CN1234320A (zh) 1999-11-10
CN1096337C (zh) 2002-12-18
DK0955131T3 (da) 2005-06-13

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