EP1122032A2 - Mandrin de serrage pour des extrémités de tiges d'outils, en particulier pour lames de tournevis - Google Patents

Mandrin de serrage pour des extrémités de tiges d'outils, en particulier pour lames de tournevis Download PDF

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Publication number
EP1122032A2
EP1122032A2 EP00128469A EP00128469A EP1122032A2 EP 1122032 A2 EP1122032 A2 EP 1122032A2 EP 00128469 A EP00128469 A EP 00128469A EP 00128469 A EP00128469 A EP 00128469A EP 1122032 A2 EP1122032 A2 EP 1122032A2
Authority
EP
European Patent Office
Prior art keywords
ball
actuating sleeve
chuck according
socket
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
EP00128469A
Other languages
German (de)
English (en)
Other versions
EP1122032A3 (fr
EP1122032B1 (fr
Inventor
Mario Ferdani
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.)
Willi Hahn GmbH and Co KG
Original Assignee
Willi Hahn 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 Willi Hahn GmbH and Co KG filed Critical Willi Hahn GmbH and Co KG
Publication of EP1122032A2 publication Critical patent/EP1122032A2/fr
Publication of EP1122032A3 publication Critical patent/EP1122032A3/fr
Application granted granted Critical
Publication of EP1122032B1 publication Critical patent/EP1122032B1/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
    • 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

Definitions

  • the invention relates to a chuck for shaft ends of Tool bits, especially screwdriver bits.
  • chucks for screwdriver bits are made of known from DE 33 24 756 A1.
  • a locking ball receding radially outwards used that extend in a radially extending Wall bore of a socket is located.
  • This chuck has one against the force of a restoring device, which as Compression spring is formed on the longitudinally movable sleeve, which the Ball in the working position of the sleeve radially against the shaft end holds and releases the shaft end in the retracted state.
  • the production of the known chuck is due to the relatively complicated shape of its individual parts, each have to be subjected to several processing steps, and the necessary number of items relatively expensive.
  • the compression spring can after long use of the Chuck fatigue, so the sleeve is no longer reliable is pressed against the shaft end. To remove the The ball must be used by moving the sleeve released against the force of the return member to the rear become. A change of the screwdriver bit with one hand is therefore not possible or only with difficulty.
  • a chuck is known from DE 43 36 376 C2, which essentially consists of three components, namely one Socket for receiving a shaft end of a bit, as well as a rotatable sleeve that is eccentric Cross-sectional expansion by simply twisting Treatmenting the ball causes that in a wall hole the socket is arranged.
  • the sleeve In one position of the sleeve, at which is the unexpanded inner peripheral surface above the Wall hole is located, the ball against the shaft end of the Bits pressed.
  • the sleeve is in the longitudinal direction of the socket preferably arranged immobile.
  • the invention is therefore based on the object Chuck for screwdriver bits to create that out few individual parts can be made, which is a long one Has lifespan and that a simple change of Tool bits allowed.
  • the shaft end of Tool bits especially screwdriver bits, receiving bushing
  • the inner cross section of the cross section the shaft end of the tool insert or Screwdriver bits corresponds to one sitting on the socket
  • Actuating sleeve which is preferably longitudinally movable, which can also be rotated for special applications can be designed to be movable
  • the essential idea of the invention is now that the actuating sleeve sitting on the socket both in one releasing the ball and thus the tool insert Position as well as in a the ball in the recess of the Shaft engaging without pressure and thus the Tool insert holding position is lockable.
  • a lockability of the actuating sleeve both in the Hold on as well as in the release position allows one particularly easy changing of the tool insert. Remains the actuating sleeve in the release position, so the Users change the tool insert without changing the sleeve must constantly hold on against the pressure of a restoring device. One-handed operation is therefore very easy. Furthermore, the number of moving parts of the Chuck minimized.
  • the socket and the actuating sleeve are preferably so designed that the ball in the recess of the The shaft engages without pressure. Such only positive locking prevents one-sided radial pressure exerted on the tool insert. This will make the mechanical loading of the ball, the actuating sleeve and the Tool insert avoided. This measure increases the Lifetime of both the chuck and the Tool insert.
  • the reduction of the components also allows an easy one Production of the chuck.
  • the ease of use of the chuck is invented improved in that the locking of Actuating sleeve in the release position or in the Hold position acoustically and / or haptically noticeable.
  • a click or noticeable click shows the user that the tool bit is released or held without he can check this by pulling on the tool insert got to.
  • the actuating sleeve is locked in the Release position or in the holding position in that a groove running in the outer wall of the socket seated snap ring in one for the release position or one for the holding position in the inner wall of the Actuating sleeve engages in circumferential groove.
  • a groove running in the outer wall of the socket seated snap ring in one for the release position or one for the holding position in the inner wall of the Actuating sleeve engages in circumferential groove.
  • the function according to the invention is very simple achieve that by the in the inner wall of the Actuating sleeve located circumferential grooves formed Widening of the inner cross section of the actuating sleeve axially tapered in the direction of the other groove, so that the sleeve in the other position against the Spring force of the in the groove of the outer wall of the socket seated snap ring can be moved with little effort is.
  • a positive locking of the ball without radial pressure and their release in the release position is preferred realized in that in the release position between the inner peripheral surface of the actuating sleeve and the outer cavity of the socket is a cavity, so that the ball is not in the recess of the Tool insert piece is pressed and that in the Holding position of this cavity is so narrowed that the Ball moved into the recess of the tool insert becomes.
  • This locking recess is preferably as a locking groove or as Turning the shaft of the screwdriver bit formed.
  • a slipping of the fingers when moving the Actuating sleeve is preferably avoided in that the Outer surface of the actuating sleeve with radially circumferential Grooves is provided, is roughened in areas or is treated accordingly.
  • a particularly advantageous embodiment of the invention Chuck is given by the fact that in the socket Permanent magnet is used. This makes one work magnetic force over the screwdriver bit and its Tip on the usually made of ferromagnetic material existing screw and holds the screw securely.
  • the ball is preferably in a radial wall bore Socket arranged, which is conical at the inner end narrowed. This prevents the ball from coming out of the hole fall out inside if there is no insert in the chuck located. On the other hand, it is not necessary to drill the hole on the opposite side, for example by caulking edit because the ball falls out through the Actuating sleeve is not possible.
  • a weakening takes place in the chuck according to the invention the socket wall does not take place, so big moments can be transferred.
  • the wall hole for receiving the ball has no reduction in mechanical Resilience of the feed results.
  • the socket 2 has a recess for receiving a shaft end 5 of a screwdriver bit 6 on.
  • the shaft end 5 is the screwdriver bit 6 hexagonal, so that the recess the socket has a corresponding hexagonal inner Has cross section.
  • the diameter of the ball 9 is slightly larger than the wall thickness of the socket 2.
  • the ball 9 is used in the Figures 2 and 4 shown holding positions of the Actuating sleeve 3, in which the actuating sleeve 3 to the front is pushed in to hold the screwdriver bit 6 in the socket 2.
  • the ball 9 engages in a locking groove 20 according to Figure 2 or in a twist of the shaft 21 according to Figure 4 a. In this position, the ball 9 with the help the actuating sleeve 3 held depressurized, as from the Figures 2, 4 and 8 can be seen.
  • the locking the actuating sleeve 3 in the release position or in the Holding position takes place in that in one in the Outside wall of the socket 2 circumferential groove 16 seated Snap ring 15 in one for the release position or one for the holding position in the inner wall of the Actuating sleeve 3 engages in circumferential groove 14.
  • circumferential groove 14 For example is the cross section of the in the outer wall of the socket 2 circumferential groove 16 formed rectangular, while by the in the inner wall of the actuating sleeve 3rd located circumferential grooves 14 formed widenings of the Inner cross section of the actuating sleeve 3 axially in the direction taper each other groove 14.
  • balls 9 can also be used in this way be arranged so that they each in the locking groove 20 or engage a twist 21 of the shaft (not shown). It can also be seen from FIGS. 1 to 4 that in the socket 2, a permanent magnet 18 is inserted. Thereby a magnetic force acts on the screwdriver bit, which this is made up of via its tip ferromagnetic steel existing screw forwards and therefore securely holds the screw.
  • a drive shaft closes at the upper end of the socket 2 19 with which the chuck 1 in a not shown Screwing tool, for example an electric screwdriver or a drill can be clamped.
  • This Drive shaft 19 is designed so that one in Screwing tool arranged holding ball in a Constriction 13 engages.
  • the fixation of the drive shaft 19 in the socket 2 takes place in a circumferential groove 17 arranged retaining member, which is based on the Inner wall of socket 2 connects.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP20000128469 2000-02-03 2000-12-23 Mandrin de serrage pour des extrémités de tiges d'outils, en particulier pour lames de tournevis Expired - Lifetime EP1122032B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20001866U 2000-02-03
DE20001866U DE20001866U1 (de) 2000-02-03 2000-02-03 Spannfutter für Schaftenden von Werkzeugeinsatzstücken, insbesondere Schraubendreherbits

Publications (3)

Publication Number Publication Date
EP1122032A2 true EP1122032A2 (fr) 2001-08-08
EP1122032A3 EP1122032A3 (fr) 2004-09-08
EP1122032B1 EP1122032B1 (fr) 2006-03-01

Family

ID=7936777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000128469 Expired - Lifetime EP1122032B1 (fr) 2000-02-03 2000-12-23 Mandrin de serrage pour des extrémités de tiges d'outils, en particulier pour lames de tournevis

Country Status (2)

Country Link
EP (1) EP1122032B1 (fr)
DE (2) DE20001866U1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003103901A2 (fr) 2002-06-10 2003-12-18 Wera Werk Mandrin pour la reception d'outils utilisables par rotation autour de leur axe
CN103021685A (zh) * 2012-12-12 2013-04-03 衢州电力局 电力系统专用操作工具
TWI562872B (en) * 2015-06-12 2016-12-21 Jei Mou Ind Co Ltd Rotatable multi-purpose tool structure
US9561581B2 (en) 2015-01-22 2017-02-07 Shu-Hui Yeh Quick-removal socket tool
WO2019031275A1 (fr) * 2017-08-10 2019-02-14 工機ホールディングス株式会社 Outil électrique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011010560B4 (de) * 2011-02-07 2015-06-03 Cobit Gmbh Bithalter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4336376A1 (de) * 1992-10-24 1994-06-09 Schmidt Ulrich Ush Schraubwerk Spannfutter für Werkzeug-Einsatzstücke
WO1998051450A2 (fr) * 1997-05-10 1998-11-19 Zierpka Eva Maria Systeme d'outil accouplable a l'arbre d'entrainement d'un tour

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4336376A1 (de) * 1992-10-24 1994-06-09 Schmidt Ulrich Ush Schraubwerk Spannfutter für Werkzeug-Einsatzstücke
WO1998051450A2 (fr) * 1997-05-10 1998-11-19 Zierpka Eva Maria Systeme d'outil accouplable a l'arbre d'entrainement d'un tour

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003103901A2 (fr) 2002-06-10 2003-12-18 Wera Werk Mandrin pour la reception d'outils utilisables par rotation autour de leur axe
WO2003103901A3 (fr) * 2002-06-10 2004-04-22 Werner Hermann Wera Werke Mandrin pour la reception d'outils utilisables par rotation autour de leur axe
US7469909B2 (en) 2002-06-10 2008-12-30 Wera Werk Hermann Werner Gmbh & Co. Kg Chuck for receiving tools operated by rotating around the axis thereof
CN103021685A (zh) * 2012-12-12 2013-04-03 衢州电力局 电力系统专用操作工具
US9561581B2 (en) 2015-01-22 2017-02-07 Shu-Hui Yeh Quick-removal socket tool
TWI562872B (en) * 2015-06-12 2016-12-21 Jei Mou Ind Co Ltd Rotatable multi-purpose tool structure
WO2019031275A1 (fr) * 2017-08-10 2019-02-14 工機ホールディングス株式会社 Outil électrique

Also Published As

Publication number Publication date
EP1122032A3 (fr) 2004-09-08
DE50012302D1 (de) 2006-04-27
EP1122032B1 (fr) 2006-03-01
DE20001866U1 (de) 2000-04-06

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