EP0221279A2 - Pièce d'insertion pour tournevis - Google Patents

Pièce d'insertion pour tournevis Download PDF

Info

Publication number
EP0221279A2
EP0221279A2 EP86112084A EP86112084A EP0221279A2 EP 0221279 A2 EP0221279 A2 EP 0221279A2 EP 86112084 A EP86112084 A EP 86112084A EP 86112084 A EP86112084 A EP 86112084A EP 0221279 A2 EP0221279 A2 EP 0221279A2
Authority
EP
European Patent Office
Prior art keywords
shaft
screwdriver
neck
shoulder
chuck
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
EP86112084A
Other languages
German (de)
English (en)
Other versions
EP0221279A3 (en
EP0221279B1 (fr
Inventor
Karl Lieser
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.)
Wera Werk Hermann Werner GmbH and Co KG
Original Assignee
Wera Werk Hermann Werner GmbH and Co KG
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 Wera Werk Hermann Werner GmbH and Co KG filed Critical Wera Werk Hermann Werner GmbH and Co KG
Publication of EP0221279A2 publication Critical patent/EP0221279A2/fr
Publication of EP0221279A3 publication Critical patent/EP0221279A3/de
Application granted granted Critical
Publication of EP0221279B1 publication Critical patent/EP0221279B1/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
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0035—Connection means between socket or screwdriver bit and tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit

Definitions

  • the invention relates to a screwdriver insert with a hexagonal shank and a stepped neck, the free end of which runs into the head forming the working tip, shoulders being provided in the region of the shank on its circumference for supporting the holding member of a screwdriver chuck.
  • the shoulders interacting with the holding member are formed by the flanks of V-notches hammered into the shaft wall.
  • the latter lie in the area of the tips of the hexagonal shaft.
  • the material that is displaced when wrapping usually brings up post-processing edges. Such rework is time consuming and costly.
  • Such material distortions arise when pressing in, for example, indications of origin, size designations, etc.
  • the screwdriver chuck may get jammed.
  • the object of the invention is to avoid the disadvantages shown and to manufacture a generic screwdriver insert technically more favorable way with high allocation precision so that post-processing becomes unnecessary.
  • the shoulder is formed so turned transition stage between the neck and shaft.
  • the latter usually consists of an open spring ring. Even larger tolerances are compensated.
  • the ring cross-section is self-regulatingly supported at some "point" of the shoulder, which can be measured relatively large, such as the V-notch flank.
  • the shoulder created by twisting also leaves enough space for the attachment of inscriptions etc., which is clearly recessed from the polygonal outline. The resulting material is no longer affected by the pin assignment.
  • the advantage achieved overall makes the small loss of rotary driving surface of the multi-edged shaft seem insignificant, especially since the holding member can be arranged in the area of the entrance of the receiving cavity.
  • the base body can be completely cold-formed or produced as a turned part with subsequent molding of the working syringe.
  • two subsequent operations are not necessary, as in the known embodiment: first screw the tapered section onto a corresponding hexagonal profile bar and then press in the groove in a further operation after the shaft-forming hexagonal section has been released; the shaft-forming hexagon section rather remains in the entire manufacturing phase.
  • the screwdriver bit has a hexagonal shaft 1 (hexagon socket). The latter takes up about a third of the total length of the mission.
  • the shaft 1 continues into a stepped neck 2, which is produced by turning and which, once again removed, merges into a cylindrical section 3.
  • the latter contains the head 4 of the tool that is upset in the tip area.
  • This can be a so-called Phillips blade (as shown) or a cutting edge for normal slotted screws.
  • the displaced material protrudes spatially beyond the lateral surface of the cylindrical section 3, but does not project beyond the lateral surface of the likewise cylindrical neck 2.
  • Both cylindrical sections essentially take up a third of the total length of the screwdriver bit.
  • the rear end of the shaft 1 is cut flat and is supported on the bottom 5 of the receiving cavity 6 of a screwdriver lining 7 from.
  • the inner wall 8 of the receiving cavity 6 has a configuration which corresponds to the shape of the hexagonal shaft, ie it is realized as an internal hexagon.
  • the back surface of the screwdriver insert, which is supported on the base 5, bears the reference number 9; it passes over a chamfer 10 into the shaft wall.
  • the insertion protection for the screwdriver insert forms a holding member 11 in the form of an open spring ring.
  • the latter has a circular cross section and is supported axially in an annular groove 12 in the inner wall 8.
  • the annular groove 12 is located in the immediate vicinity of the entrance to the receiving cavity 6, so that the longest possible bearing zone of the shaft 1 is present.
  • the channel bottom 13 is cylindrical.
  • the flanks 14 and 15 are perpendicular to the longitudinal central axis x-x of the screwdriver bit.
  • the groove depth corresponds to approximately half the width of the channel base 13.
  • the annular holding member 11 When the bit is inserted, the annular holding member 11 is supported on the one hand on the groove flank 14 closer to the receiving hollow opening and on the other hand on a shoulder 16 produced by the transition step between shaft 1 and neck 2. This is inclined.
  • the angle of inclination alpha is approx. 60 °.
  • the tip of the circumscribing conical surface lies in the direction of the head 4. This results in a self-regulating system within a considerable margin, as is clear from a comparison of FIGS. 3 and 4.
  • the spring ring When the screwdriver insert is not inserted, the spring ring extends up to two thirds of its cross section into the clear cavity so that a third remains to fix the position.
  • the holding member 11 When inserted, the holding member 11 overflows the chamfer 10, which practically forms a run-up ramp, with maximum expansion of its ring body, in order finally to snap in front of the shoulder 16.
  • the restoring force presses the rear surface 9 of the screwdriver bit firmly against the corres by means of the control function of the shoulder 16 ponding bottom 5 of the receiving cavity 6.
  • the cross section of the annular holding member 11 comes into a more or less close radial position to the longitudinal central axis xx of the screwdriver handle.
  • shaft 1 for example, has turned out approximately longer.
  • the holding member presses against the shoulder 16 in a more peripheral area.
  • the holding member 11 moves further inwards.
  • the screwdriver chuck 7 sits at the free end of the shaft 18 of a screwdriver tool, the handle 19 of which is only partially shown in FIG. 1.
  • the foot of the transition step shoulder 16 could be tip-sided, i.e. rise again outside the plane of the groove flank 14, forming a second flank, since this flank does not bear, i.e. does not affect the self-correcting clamping effect.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Automatic Assembly (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP86112084A 1985-10-31 1986-09-01 Pièce d'insertion pour tournevis Expired - Lifetime EP0221279B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3538675 1985-10-31
DE19853538675 DE3538675A1 (de) 1985-10-31 1985-10-31 Schraubendrehereinsatz

Publications (3)

Publication Number Publication Date
EP0221279A2 true EP0221279A2 (fr) 1987-05-13
EP0221279A3 EP0221279A3 (en) 1987-12-23
EP0221279B1 EP0221279B1 (fr) 1990-05-16

Family

ID=6284864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86112084A Expired - Lifetime EP0221279B1 (fr) 1985-10-31 1986-09-01 Pièce d'insertion pour tournevis

Country Status (2)

Country Link
EP (1) EP0221279B1 (fr)
DE (2) DE3538675A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989008536A1 (fr) * 1988-03-10 1989-09-21 Wera-Werk Hermann Werner Gmbh & Co. Embout tournevis
US6053675A (en) * 1998-06-26 2000-04-25 Black & Decker Inc. Quick-acting tool bit holder
EP1424166A1 (fr) * 2002-11-28 2004-06-02 Ho-Tien Chen Support pour clé tubulaire
EP1902816A3 (fr) * 2006-09-25 2008-05-14 Black & Decker, Inc. Embout de tournevis pour vis autoforeuse
US9849570B2 (en) 2008-11-07 2017-12-26 Milwaukee Electric Tool Corporation Tool bit
US10022845B2 (en) 2014-01-16 2018-07-17 Milwaukee Electric Tool Corporation Tool bit
USD921468S1 (en) 2018-08-10 2021-06-08 Milwaukee Electric Tool Corporation Driver bit
US11638987B2 (en) 2017-12-01 2023-05-02 Milwaukee Electric Tool Corporation Wear resistant tool bit

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9014997U1 (de) * 1990-10-31 1992-03-19 Willi Hahn GmbH & Co KG, 7745 Schonach Spannfutter für Werkzeugeinsätze, insbesondere Schraubendreherbits
CH687746A5 (de) * 1993-11-25 1997-02-14 Mungo Befestigungstech Ag Werkzeug zum Einbringen eines mit Aussengewinde versehenen Befestigungselementes in Baumaterial.
DE29621782U1 (de) * 1996-12-16 1998-04-09 Wera-Werk Hermann Werner Gmbh & Co, 42349 Wuppertal Schraubendrehereinsatz
USD424075S (en) 1998-06-26 2000-05-02 Black & Decker Inc. Collar for tool bit holder
USD429262S (en) 1998-06-26 2000-08-08 Black & Decker Inc. Tool bit holder
DE10348057B3 (de) * 2003-10-16 2004-12-16 Metabowerke Gmbh Handwerkzeuggerät
USD623036S1 (en) 2008-11-07 2010-09-07 Milwaukee Electric Tool Corporation Insert bit
USD711719S1 (en) 2009-11-06 2014-08-26 Milwaukee Electric Tool Corporation Tool bit
CN108372485B (zh) * 2018-02-22 2023-06-06 南京久驰机电实业有限公司 一种电动工具多功能输出机构

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833548A (en) * 1956-07-19 1958-05-06 Wade Stevenson Implement driving device
US3288185A (en) * 1965-01-15 1966-11-29 Wade Stevenson Screwdriver construction
DE1603907A1 (de) * 1967-08-31 1971-07-08 Murphy Ind Inc G W Werkzeug zum Festziehen und Loesen von Befestigungsmitteln
US3935762A (en) * 1974-11-12 1976-02-03 Creative Tools, Inc. Tool assembly for mounting bits
US4096896A (en) * 1977-04-29 1978-06-27 Upson Tools, Inc. Composite tool structure
US4296656A (en) * 1980-04-21 1981-10-27 Illinois Tool Works Inc. Driver bit attachment
DE3215004A1 (de) * 1982-04-22 1983-10-27 Itw-Ateco Gmbh, 2000 Norderstedt Bohr-schraub-werkzeug
DE3243389C2 (de) * 1982-11-24 1986-05-15 Wera Werk Hermann Werner Gmbh & Co, 5600 Wuppertal Spannfutter für unrund gestaltete Schaftenden von Werkzeug-Einsatzstücken, insbesondere Schraubendreherbits
DE3330486A1 (de) * 1983-08-24 1985-03-07 Wera Werk Hermann Werner Gmbh & Co, 5600 Wuppertal Spannfutter fuer werkzeug-einsatzstuecke, insbesondere schraubendreherbits

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0336136A1 (fr) * 1988-03-10 1989-10-11 Wera-Werk Hermann Werner GmbH & Co. Embout de tournevis
WO1989008536A1 (fr) * 1988-03-10 1989-09-21 Wera-Werk Hermann Werner Gmbh & Co. Embout tournevis
US6053675A (en) * 1998-06-26 2000-04-25 Black & Decker Inc. Quick-acting tool bit holder
EP1424166A1 (fr) * 2002-11-28 2004-06-02 Ho-Tien Chen Support pour clé tubulaire
EP1902816A3 (fr) * 2006-09-25 2008-05-14 Black & Decker, Inc. Embout de tournevis pour vis autoforeuse
US11407090B2 (en) 2008-11-07 2022-08-09 Milwaukee Electric Tool Corporation Tool bit
US9849570B2 (en) 2008-11-07 2017-12-26 Milwaukee Electric Tool Corporation Tool bit
US10065294B2 (en) 2008-11-07 2018-09-04 Milwaukee Electric Tool Corporation Tool bit
US10022845B2 (en) 2014-01-16 2018-07-17 Milwaukee Electric Tool Corporation Tool bit
US12564918B2 (en) 2014-01-16 2026-03-03 Milwaukee Electric Tool Corporation Tool bit
US11638987B2 (en) 2017-12-01 2023-05-02 Milwaukee Electric Tool Corporation Wear resistant tool bit
US11958168B2 (en) 2017-12-01 2024-04-16 Milwaukee Electric Tool Corporation Wear resistant tool bit
USD955843S1 (en) 2018-08-10 2022-06-28 Milwaukee Electric Tool Corporation Driver bit
USD921468S1 (en) 2018-08-10 2021-06-08 Milwaukee Electric Tool Corporation Driver bit

Also Published As

Publication number Publication date
EP0221279A3 (en) 1987-12-23
DE3538675A1 (de) 1987-05-07
EP0221279B1 (fr) 1990-05-16
DE3538675C2 (fr) 1987-07-30
DE3671184D1 (de) 1990-06-21

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