EP0221279B1 - Schraubendrehereinsatz - Google Patents

Schraubendrehereinsatz Download PDF

Info

Publication number
EP0221279B1
EP0221279B1 EP86112084A EP86112084A EP0221279B1 EP 0221279 B1 EP0221279 B1 EP 0221279B1 EP 86112084 A EP86112084 A EP 86112084A EP 86112084 A EP86112084 A EP 86112084A EP 0221279 B1 EP0221279 B1 EP 0221279B1
Authority
EP
European Patent Office
Prior art keywords
screwdriver
shoulder
chuck
neck
screw driver
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
EP86112084A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0221279A2 (de
EP0221279A3 (en
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/de
Publication of EP0221279A3 publication Critical patent/EP0221279A3/de
Application granted granted Critical
Publication of EP0221279B1 publication Critical patent/EP0221279B1/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
    • 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 arranged in a screwdriver chuck according to the preamble of the main claim.
  • the object of the invention is to avoid the disadvantages shown and to design a generic screwdriver insert in a more technically advantageous manner with a high degree of coordination so that post-processing becomes unnecessary.
  • flank contact of the holding member usually consists of an open spring ring. Even larger tolerance deviations are compensated for, in particular because the flank can also be made relatively long and the holding member relatively large / stable.
  • the ring cross-section is self-regulatingly supported at some "point" of the relatively large oblique shoulder. The e.g. by turning off the shoulder, the neck also creates a mounting surface that is significantly less than the polygonal outline for pressing lettering, etc. On the other hand, any material that arises does not affect the pin assignment.
  • the fact that the head is pressed against a cylinder section that is again stepped in relation to the neck brings above all manufacturing advantages:
  • the base body is completely cold-formable with subsequent shaping of the working tip.
  • the neck forms an intermediate zone that accepts tolerances, which has no influence on the fit in the lining and the dimensional accuracy of the working tip.
  • the screwdriver bit has a hexagonal shaft 1 (hexagon socket). The latter takes up about a third of the total length of the insert.
  • 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 chuck 7.
  • the inner wall 8 of the receiving cavity 6 has a configuration corresponding to the hexagonal shaft, i.e. it is realized as a hexagon socket.
  • 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 which is closer to the receiving hollow opening and on the other hand on a shoulder 16 produced by the transition step between the shaft 1 and the 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 Head 4. This results in a self-regulating system within a considerable scope, as can be seen 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 one 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 insert firmly against the corresponding base 5 of the receiving cavity 6 by means of the control function of the shoulder 16.
  • the cross section of the annular holding member 11 enters one more or less close radial position to the longitudinal central axis xx of the screwdriver booklet.
  • the shaft 1 has, for example, turned out to be somewhat longer.
  • the holding member presses against the shoulder 16 in a more peripheral region.
  • 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)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Gripping On Spindles (AREA)
  • Automatic Assembly (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP86112084A 1985-10-31 1986-09-01 Schraubendrehereinsatz Expired - Lifetime EP0221279B1 (de)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=6284864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86112084A Expired - Lifetime EP0221279B1 (de) 1985-10-31 1986-09-01 Schraubendrehereinsatz

Country Status (2)

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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
USD623036S1 (en) 2008-11-07 2010-09-07 Milwaukee Electric Tool Corporation Insert bit
USD646547S1 (en) 2008-11-07 2011-10-11 Milwaukee Electric Tool Corporation Tool bit
USD711719S1 (en) 2009-11-06 2014-08-26 Milwaukee Electric Tool Corporation Tool bit

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02503405A (ja) * 1988-03-10 1990-10-18 ウエラ‐ウエルク・ヘルマン・ウエルネル・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング・ウント・コンパニー ねじ回し差込体
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
US6053675A (en) * 1998-06-26 2000-04-25 Black & Decker Inc. Quick-acting tool bit holder
DE60219330T2 (de) * 2002-11-28 2008-01-03 Ho-Tien Chen Steckschlüsselhalter
DE10348057B3 (de) * 2003-10-16 2004-12-16 Metabowerke Gmbh Handwerkzeuggerät
US20080072717A1 (en) * 2006-09-25 2008-03-27 Stumpf William R Drywall screwdriver bit
US10022845B2 (en) 2014-01-16 2018-07-17 Milwaukee Electric Tool Corporation Tool bit
US11638987B2 (en) 2017-12-01 2023-05-02 Milwaukee Electric Tool Corporation Wear resistant 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
USD921468S1 (en) 2018-08-10 2021-06-08 Milwaukee Electric Tool Corporation Driver bit

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 (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
USD623036S1 (en) 2008-11-07 2010-09-07 Milwaukee Electric Tool Corporation Insert bit
USD631723S1 (en) 2008-11-07 2011-02-01 Milwaukee Electric Tool Corporation Insert bit
USD646547S1 (en) 2008-11-07 2011-10-11 Milwaukee Electric Tool Corporation Tool bit
USD662802S1 (en) 2008-11-07 2012-07-03 Milwaukee Electric Tool Corporation Tool bit
USD663187S1 (en) 2008-11-07 2012-07-10 Milwaukee Electric Tool Corporation Tool bit
US8418587B2 (en) 2008-11-07 2013-04-16 Milwaukee Electric Tool Corporation Tool bit
US8800407B2 (en) 2008-11-07 2014-08-12 Milwaukee Electric Tool Corporation Method of manufacturing a tool bit
USD711719S1 (en) 2009-11-06 2014-08-26 Milwaukee Electric Tool Corporation Tool bit

Also Published As

Publication number Publication date
EP0221279A2 (de) 1987-05-13
DE3538675A1 (de) 1987-05-07
EP0221279A3 (en) 1987-12-23
DE3671184D1 (de) 1990-06-21
DE3538675C2 (enrdf_load_stackoverflow) 1987-07-30

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