EP0629149A1 - Spannfutter für werkzeug-einsätze, insbesondere für schraubendreher - Google Patents

Spannfutter für werkzeug-einsätze, insbesondere für schraubendreher

Info

Publication number
EP0629149A1
EP0629149A1 EP93905311A EP93905311A EP0629149A1 EP 0629149 A1 EP0629149 A1 EP 0629149A1 EP 93905311 A EP93905311 A EP 93905311A EP 93905311 A EP93905311 A EP 93905311A EP 0629149 A1 EP0629149 A1 EP 0629149A1
Authority
EP
European Patent Office
Prior art keywords
screwdriver
receiving part
chuck
spring
compression spring
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.)
Withdrawn
Application number
EP93905311A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ewald Hornung
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.)
Helfer and Co KG
Original Assignee
Helfer 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 Helfer and Co KG filed Critical Helfer and Co KG
Publication of EP0629149A1 publication Critical patent/EP0629149A1/de
Withdrawn legal-status Critical Current

Links

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
    • 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
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • B25B23/12—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using magnetic means

Definitions

  • the invention relates to a chuck according to the preamble of claim 1.
  • DE-OS 2 934 428 shows a chuck of this type, with a bushing corresponding to the cross section of the screwdriver with a window-shaped opening in which a pressure piece acting on the shaft of the screwdriver lies in the form of a ball.
  • a sleeve Arranged on this sleeve is a sleeve which can be displaced against the action of a spring and which has a wedge-shaped clamping surface, which acts on the ball in such a way that the screwdriver can be loosened or locked
  • the invention is based on the consideration of avoiding these shortcomings and inconveniences.
  • the object of the invention is to simplify this chuck, which is part of the prior art, and thus to reduce the production costs to a minimum, and also to increase the service life.
  • the seat for a compression spring is provided at the screwdriver-side end of the receiving part, which acts on a disc-like element penetrated by the screwdriver in such a way that it relaxes the compression spring tilted relative to the longitudinal axis of the screwdriver, that the element is articulated at the screwdriver end of the receiving part and has a recess, the limiting edges of which are adapted to those of the cross-sectional area of the screwdriver, and that a seat is provided in the sliding sleeve, which is located in the release position of the screwdriver against the element.
  • the proposal according to the invention reduces the components required for locking and loosening the screwdriver to a minimum. Basically, only the specially designed spring and the plate-like element cooperating with it with the action of a clamping device suffice to solve this problem.
  • the screwdriver By simply moving the sliding sleeve in the direction of the hand drill, the screwdriver can be easily and conveniently inserted into or removed from the receiving part, while when the sliding sleeve is released by releasing the compression spring, the disk-like element is transferred to the clamping position
  • the articulated connection has a hook-shaped projection on the screw-side end of the receiving part, which engages in a bulge in the recess and engages behind the element in the region of the bulge.
  • the winding of the compression spring directly opposite the element is tilted relative to the longitudinal axis thereof in the relaxed state of the compression spring.
  • FIG. 3 shows a vertical partial section on an enlarged scale of the chuck according to the invention in the locking position of the screwdriver
  • REPLACEMENT LEAF Fig. 5 is a side view in an enlarged scale
  • the clamping pin is designated, which is connected in a suitable manner with the drill chuck of a power-driven hand drill, not shown in the drawing, so that the rotary movement of the drive shaft of the drilling machine is transmitted to the clamping pin 1.
  • the clamping pin 1 is connected in a suitable manner to a hollow cylindrical receiving part 2 for the screwdriver 3.
  • the end of the sliding sleeve 4 facing the screwdriver 3 is conical in the embodiment shown.
  • a seat 2a is provided for a compression spring 5, which in the embodiment shown is designed as a spiral spring.
  • This compression spring 5 acts on a disc-like element 6 penetrated by the screwdriver 3 in such a way that it cant relative to the longitudinal axis of the screwdriver 3 during the relaxation of the compression spring 5 (FIGS. 1 and 3).
  • the disc-shaped element 6 is articulated on the screwdriver end of the receiving part 2.
  • This articulated connection can be designed in various ways. In the embodiment shown in the drawing, this is done in such a way that a hook-shaped extension 2b is arranged on the screwdriver-side end of the receiving part 2, which engages in a bulge 6a (FIG. 4) in the recess 6b of the disk-shaped element 6 and this reaches behind in the area of this recess 6b (FIGS
  • the boundary edges of the recess 6b in the disc-shaped element 6 are those of the cross-sectional area of the screwdriver
  • a seat 4a is provided in the sliding sleeve 4, against which the element 6 rests when the screwdriver 3 is in the released position.
  • a coil spring is provided as the compression spring 5.
  • the winding 5a of the compression spring 5 directly opposite the element 6 is tilted relative to the longitudinal axis thereof in the relaxed state of the compression spring 5 (FIG. 5).
  • the element 6 and the compression spring 5 form two separate parts. However, this need not be the case. It is within the scope of the invention to combine these two elements. In this case it will be appropriate
  • REPLACEMENT LEAF to form the spring as an oblique leaf spring, one end of which has the shape of the disk-like element 6.
  • Other alternatives are also possible.
  • a permanent magnet 7 is provided in the cavity of the receiving part 2 between the screwdriver 3 and the clamping pin 1, which generates an adhesive force at the tip of the screwdriver 3.
  • the drive-side end of the permanent 'magnet was added by an insulating sleeve 8. 7
  • a compression spring 9 for length compensation can be provided in the receiving part 2.
  • the chuck works as follows:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP93905311A 1992-03-07 1993-03-06 Spannfutter für werkzeug-einsätze, insbesondere für schraubendreher Withdrawn EP0629149A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4207337A DE4207337C1 (enrdf_load_stackoverflow) 1992-03-07 1992-03-07
DE4207337 1992-03-07
PCT/EP1993/000513 WO1993017834A1 (de) 1992-03-07 1993-03-06 Spannfutter für werkzeug-einsätze, insbesondere für schraubendreher

Publications (1)

Publication Number Publication Date
EP0629149A1 true EP0629149A1 (de) 1994-12-21

Family

ID=6453530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93905311A Withdrawn EP0629149A1 (de) 1992-03-07 1993-03-06 Spannfutter für werkzeug-einsätze, insbesondere für schraubendreher

Country Status (5)

Country Link
EP (1) EP0629149A1 (enrdf_load_stackoverflow)
KR (1) KR950700814A (enrdf_load_stackoverflow)
CA (1) CA2131179A1 (enrdf_load_stackoverflow)
DE (1) DE4207337C1 (enrdf_load_stackoverflow)
WO (1) WO1993017834A1 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4417210A1 (de) * 1994-05-17 1995-11-23 Optigrip Werkzeuge Körper zum Festhalten von Werkzeug
EP0999921B1 (de) * 1997-07-31 2002-02-20 USH Schraubwerkzeugfabrik Ulrich SchmidtGmbH & Co. KG. Spannfutter mit bogenstück
WO2000037220A1 (de) * 1998-12-19 2000-06-29 Felo-Werkzeugfabrik Holland-Letz Gmbh Spannfutter für auswechselbare werkzeugeinsätze
CN1151012C (zh) * 1999-05-03 2004-05-26 麦克斯泰克制造公司 快速连接机构
US6378402B1 (en) 2000-02-29 2002-04-30 Black & Decker Inc. Hand tool
KR100380640B1 (ko) * 2000-09-15 2003-04-16 이홍근 드라이버의 나사 가이드장치
AU2003240620A1 (en) * 2002-06-10 2003-12-22 Wera Werk Chuck for receiving tools operated by rotating around the axis thereof
DE10254339B4 (de) * 2002-06-10 2019-10-10 Wera Werkzeuge Gmbh Futter zur Aufnahme von durch Drehen um ihre Achse verwendbare Werkzeuge
DE10348057B3 (de) * 2003-10-16 2004-12-16 Metabowerke Gmbh Handwerkzeuggerät

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2550775A (en) * 1949-07-13 1951-05-01 Wade Stevenson Magnetic screw driver
FR2128997A5 (enrdf_load_stackoverflow) * 1971-03-10 1972-10-27 Geffroy Robert
GB2050881B (en) * 1979-06-19 1983-01-06 Kango Electric Hammers Ltd Depth stop for a drilling tool
DE2934428A1 (de) * 1979-08-25 1981-03-26 Wera-Werk Hermann Werner Gmbh & Co, 42349 Wuppertal Spannfutter fuer werkzeug-einsatzstuecke, insbesondere schraubendreherbits
DE3201365A1 (de) * 1981-10-06 1983-04-14 Beckmann KG, 7410 Reutlingen Vorrichtung zum verhindern einer axialbewegung eines gefuehrten rundprofilkoerpers, insbesondere eines zapfrohres an einem bierfass

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9317834A1 *

Also Published As

Publication number Publication date
KR950700814A (ko) 1995-02-20
WO1993017834A1 (de) 1993-09-16
CA2131179A1 (en) 1993-09-08
DE4207337C1 (enrdf_load_stackoverflow) 1993-06-09

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