EP1506843B1 - Dispositif de serrage pour embouts de tournevis hexagonaux - Google Patents

Dispositif de serrage pour embouts de tournevis hexagonaux Download PDF

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Publication number
EP1506843B1
EP1506843B1 EP04017796A EP04017796A EP1506843B1 EP 1506843 B1 EP1506843 B1 EP 1506843B1 EP 04017796 A EP04017796 A EP 04017796A EP 04017796 A EP04017796 A EP 04017796A EP 1506843 B1 EP1506843 B1 EP 1506843B1
Authority
EP
European Patent Office
Prior art keywords
locking element
locking
clamping device
hexagon
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.)
Expired - Fee Related
Application number
EP04017796A
Other languages
German (de)
English (en)
Other versions
EP1506843A1 (fr
Inventor
Dieter Hirt
Wilhelm Geis
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.)
Techtronic Industries GmbH
Original Assignee
AEG Electric Tools GmbH
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 AEG Electric Tools GmbH filed Critical AEG Electric Tools GmbH
Publication of EP1506843A1 publication Critical patent/EP1506843A1/fr
Application granted granted Critical
Publication of EP1506843B1 publication Critical patent/EP1506843B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25B15/02—Screwdrivers operated by rotating the handle
    • 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
    • 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
    • Y10T279/17666—Radially reciprocating jaws
    • Y10T279/17692—Moving-cam actuator
    • Y10T279/17743—Reciprocating cam sleeve
    • Y10T279/17752—Ball or roller jaws
    • 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
    • Y10T408/94—Tool-support
    • Y10T408/95—Tool-support with tool-retaining means
    • Y10T408/953—Clamping jaws

Definitions

  • the invention relates to a clamping device with a hexagonal socket for hex bits with the features according to the preamble of claim 1.
  • a variety of glands is carried out with mechanical or electromechanical aids, with mains or battery-operated drills, mechanical ratchets or the like. Be used.
  • hexagon bits As a universally applicable tool so-called hexagon bits have found widespread use. These hex bits have a substantially hexagonal cross-section, which is held in corresponding hex shots, wherein the torque is transmitted from the hexagonal socket to the hexagon bit via surface pressure on the side surfaces of the hexagon bit.
  • Corresponding connectors allow, as needed, the use of slotted or funnelschlitzbits, bits for receiving screw nuts or other adapted to the particular purpose hex bits.
  • hex bits in the quarter-inch format have prevailed.
  • clamping devices with a hexagonal socket known in which clamped hex bits are held by means of suitable locking elements in the axial direction of liquid form.
  • the hexagon bits latch recesses, for example in the form of a circumferential annular groove, in which engages the locking element. To insert or remove appropriate bits a cumbersome unlocking is required.
  • the spherical locking element protrudes in a rest position radially inwardly into the hexagonal socket. In this case, it is defined with respect to its radial position by a cylindrical retaining wall of a locking sleeve.
  • a rotating spring ring When inserting the hexagon bits, it is displaced so far in the axial direction of insertion against the force of a rotating spring ring that it can be deflected radially and releases the hexagonal socket for complete insertion of the hexagon bit.
  • the leadership and bias of the locking element by the circumferential spring ring is inaccurate and with respect to the effective direction is not precisely defined. The reliability of the locking of the hexagon bit can be improved.
  • the invention has for its object to provide a corresponding clamping device, are held reliably in the hex bits and easily replaceable.
  • a clamping device is proposed with a locking element, wherein the locking element is fixed in the rest position with respect to its radial position and is displaceable in the axial direction of insertion of the hexagon bits in a radial deflection releasing receiving position.
  • the locking element is in the absence or inserted hexagon bit in its rest position.
  • To insert the hexagonal bit is pushed in the axial direction of insertion in the hexagonal socket until it to the inwardly into the hexagonal socket protruding and locked in the rest position locking element strikes.
  • the locking element is displaced in the axial direction of insertion until it reaches a receiving position.
  • the locking element is deflectable in the radial direction, as a result of which the hexagon bit can be pushed completely into its hexagonal socket.
  • an automatic unlocking wherein the locking element is then returned to its rest position and holds the hexagon bit form-fitting captive.
  • the insertion of a bit is limited to the insertion process. A separate unlocking is not required.
  • the locking element is designed such that it is axially displaceable against the force of a compression spring, in particular enclosing the hexagonal receptacle. After deflection of the locking element in the release position this can then automatically return to the locked rest position. A manual locking is not required.
  • the hexagonal socket enclosing helical compression spring requires only small volume.
  • the contact plate has in the region of the locking element on an inwardly inclined slope. It is a precisely defined adhesion between compression spring and locking element achievable.
  • the inwardly inclined slope results in a radially inwardly directed force component which assists in locking the locking element into the locking recess of the hex bit.
  • the slope in Kalottenform results in a good leadership of trained as a ball locking element.
  • the control sleeve is designed such that it is displaceable from its rest position in the direction of a free end of the hexagonal socket against the force of a compression spring.
  • the locking sleeve is only to pull in the same direction in which the bit is to be removed.
  • the locking element is released.
  • the hexagon bit can be removed.
  • the locking sleeve can be pulled with only two or three fingers of one hand and at the same time the released bit with the same fingers and in the same direction.
  • the compression spring leads to an automatic return of the locking sleeve in its initial position, as a result, the locking element is locked in its rest position. Cumbersome separate locking or unlocking operations can be omitted.
  • the hexagonal seat advantageously has a slot within which the locking element is guided in the axial direction. It is given by simple means a longitudinally limited and immovably fixed in the circumferential direction guiding the locking element.
  • a locking sleeve is advantageously provided with a retaining wall, wherein the retaining wall holds the locking element in its rest position radially outwardly and thus locked.
  • the resulting positive locking of the locking element leads to a great holding power.
  • the clamped and locked hexagon bit can hardly be lost even under difficult conditions.
  • a radially outwardly widening chamfer is provided in the axial direction on the side opposite the free end of the retaining wall.
  • the bevel leads to a radially inwardly directed, acting on the locking element force component.
  • the locking element is reliably pressed into the locking recess of the hexagon bit.
  • In the axial direction is advantageous provided on the free end facing side of the retaining wall a radially inwardly extending stop. This results in a precise relative position of the locking sleeve to the locking element. The required during insertion of the bit for unlocking axial travel of the locking element and also the axial Entriegelungsweg the locking sleeve when removing the bits are precisely predetermined and adaptable to the needs of the user.
  • the locking sleeve is expediently designed as a substantially rotationally symmetrical rotary part.
  • the sleeve is easily operable even under dirty environmental conditions as well as with protective gloves.
  • the locking element is advantageously designed as a ball.
  • the relative movements between the ball, hexagon bit, contact plate and locking sleeve can be performed essentially unrolling. There is only a slight wear.
  • Fig. 1 shows in a longitudinal sectional view of the tool shaft 19 of a cordless drill in the region of its front end 20. It may also be provided a tool shaft 19 of a mains powered drill or other hand-held machine tool.
  • a clamping device 1 for a hexagon bit 3 is integrated in the front end 20 of the tool shaft 19.
  • the clamping device 1 comprises a hexagonal socket 2, which is formed integrally with the tool shaft 19.
  • the hexagonal receptacle 2 has the cross section of a regular hexagon, wherein the hexagon bit 3, which has a hexagonal design in cross section, can be inserted with little play in the insertion direction indicated by the arrow 6.
  • a suitable triangular cross section or the like can also be provided. It may also be expedient to provide, instead of the integrated into the tool shaft 19 embodiment of the clamping device 1 designed as a separate component clamping device 1, for example, for fixing in a three-jaw chuck, in a ratchet or the like.
  • a locking element 4 is provided, which is formed in the illustrated embodiment as a ball 18. It may also be a latch-shaped locking element 4, a spring wire or the like. Be appropriate.
  • the locking element 4 is held in a slot 11 of the hexagonal socket 2 and protrudes radially inwards into the hexagonal socket 2.
  • the hexagonal receptacle 2 is enclosed on the outside in approximately its entire length by a locking sleeve 13.
  • the locking sleeve 13 is formed as a rotationally symmetrical rotary part.
  • the locking sleeve 13 has a circumferential cylindrical retaining wall 12, which rests against the locking element 4 on the outside. In this case, the locking element 4 is shown lying in its rest position and thereby blocking or locking it radially outward by means of the retaining wall 12.
  • a bearing plate 9 is pressed axially against the locking element 4 in the direction of a free end 14 of the clamping device 1.
  • the abutment plate 9 is located by means of a radially inwardly inclined bevel 10 on the locking element 4, whereby this is biased radially inwardly and axially in the direction of the free end 14.
  • the slope 10 may be formed as a plane, a dome or the like. Due to the axial force component, the locking element 4 is located at a free end 14 facing the end of the elongated hole 11 and also on a stop 17 of the locking sleeve 13.
  • the stop 17 extends radially inwardly on the free end 14 facing side of the retaining wall 12.
  • the hexagon bit 3 in the direction of the arrow 6 as far inserted until it abuts the inwardly projecting into the hexagonal receptacle 2 locking element 4.
  • the locking element 4 is axially displaceable within the elongated hole 11 against the biasing force of the compression spring 7 in the direction of the arrow 6.
  • the tool shaft 19 has a chuck receptacle 21 on which, for example, a three-jaw chuck can be fixed.
  • the outer diameter D 2 of the Bohrfutterability 21 is greater than the outer diameter D 1 of the locking sleeve thirteenth
  • Fig. 2 shows the arrangement after Fig. 1 with a partially further inserted hexagon bit 3.
  • the locking element 4 is together with the hexagon bit 3 axially in the direction of the arrow 6 relative to the in Fig. 1 moved rest position shown and has taken a recording position.
  • the locking element 4 In the receiving position shown, the locking element 4 is so axially displaced relative to the retaining wall 12, that the retaining wall 12 is no longer on the outside of the locking element 4.
  • the locking element 4 is pushed in its receiving position shown so radially outward that it no longer protrudes into the hexagonal socket 2. From the in Fig. 2 As shown, the hexagon bit 3 can be fully inserted up to a stop 26, wherein the locking element 4 is pressed by the force of the compression spring 7 in the axial direction against the chamfer 16.
  • Fig. 3 shows the arrangement according to the Fig. 1 and 2 , in which the hexagon bit 3 is inserted to the stop 26.
  • the hexagon bit 3 has a locking recess 5, which is formed in the embodiment shown as a circumferential groove. Other suitable recesses, such as blind holes or the like, may be useful.
  • the slope 10 of the investment plate 9 and the chamfer 16 within the locking sleeve 13 cause via the pressure force of the coil spring 8, a radially inwardly directed force component, as a result, the locking element 4 is pressed into the locking recess 5.
  • the locking sleeve 3 is slidably guided in the axial direction on the outside of the hexagonal socket 2.
  • a compression spring 15 is arranged, which is supported in one direction against a flange 27 of the locking sleeve 13 and in the opposite direction against a stop ring 23.
  • the stop ring 23 is supported in the axial direction by means of a spring ring 24 held in a circumferential groove 25.
  • the locking sleeve 13 is slidable against the force of the compression spring 15 in the direction of the free end 14 or against the direction indicated by the arrow 6 inserting direction 6.
  • the locking sleeve 13 accordingly Fig. 4 be moved against the force of the compression spring 15 and counter to the direction of insertion 6.
  • the locking element 4 remains under the action of the compressive force of the coil spring 8 in abutment with the located on the side of the free end 14 end of the slot 11.
  • the locking sleeve 13 is so far against the insertion direction 6 shifted that the retaining wall 12, the locking element on the outside not more encloses.
  • the locking element 4 is released radially outward and thereby displaced so far outward that it no longer protrudes into the hexagonal receptacle 2 and the locking recess 5.
  • the hexagon bit 3 can be removed against the insertion direction 6.
  • the removal direction and the necessary to release the pulling direction of the locking sleeve 13 match.
  • the pulling of the locking sleeve 13 of the in Fig. 3 shown position in the position Fig. 4 and taking place in the same direction removal of the hexagon bit 3 can be done simultaneously and with one hand.
  • this has on the outside a surface structuring, which is formed by two circumferential grooves 22 in the illustrated embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Clamps And Clips (AREA)

Claims (9)

  1. Dispositif de serrage (1) avec un logement hexagonal (2) présentant une extrémité (14) libre pour embouts de tournevis hexagonaux (3), comprenant un élément de verrouillage (4) pouvant être dévié radialement pour l'engagement dans une cavité de verrouillage (5) de l'embout de tournevis hexagonal (3), l'élément de verrouillage (4) dépassant dans une position de repos radialement vers l'intérieur dans le logement hexagonal (2), l'élément de verrouillage (4) réalisé en particulier comme une sphère (18) étant fixé dans la position de repos par rapport à sa position radiale par une paroi de retenue (12) cylindrique d'une douille de verrouillage (13) et pouvant être déplacé dans le sens d'insertion axial (6) de l'embout de tournevis hexagonal (3) contre la force d'un ressort de pression (7) dans une position de réception libérant la capacité de déviation radiale, caractérisé en ce qu'une rondelle d'appui (9) est disposée entre l'élément de verrouillage (4) et le ressort de pression (7), laquelle présente dans la zone de l'élément de verrouillage (4) un chanfrein (10) incliné radialement vers l'intérieur, grâce à quoi l'élément de verrouillage (4) est précontraint radialement vers l'intérieur et axialement en direction de l'extrémité libre (14) et en ce que la douille de verrouillage (13) peut être déplacée de sa position de repos en direction de l'extrémité libre (14) du logement hexagonal (2) contre la force d'un ressort de pression (15).
  2. Dispositif de serrage selon la revendication 1, caractérisé en ce que l'élément de verrouillage (4) peut être déplacé axialement contre la force d'un ressort de pression (7) entourant le logement hexagonal (2).
  3. Dispositif de serrage selon la revendication 2, caractérisé en ce qu'une rondelle d'appui (9) est disposée entre l'élément de verrouillage (4) et le ressort de pression (7) réalisé comme un ressort à boudin (8), laquelle présente avantageusement dans la zone de l'élément de verrouillage (4) un chanfrein (10) incliné radialement vers l'intérieur.
  4. Dispositif de serrage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'élément de verrouillage (4) est guidé dans le sens axial dans un trou oblong (11).
  5. Dispositif de serrage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que dans le sens axial sur le côté opposé à l'extrémité libre (14) de la paroi de retenue (12) est prévu un biseautage (16) s'étendant radialement vers l'extérieur.
  6. Dispositif de serrage selon la revendication 5, caractérisé en ce que dans le sens axial sur le côté dirigé vers l'extrémité libre (14) de la paroi de retenue (12) est prévue une butée (17) s'étendant radialement vers l'intérieur.
  7. Dispositif de serrage selon l'une quelconque des revendications 5 ou 6, caractérisé en ce que la douille de verrouillage (13) est réalisée essentiellement comme une pièce tournée à symétrie de révolution et présente en particulier côté extérieur une structuration de surface.
  8. Dispositif de serrage selon l'une quelconque des revendications 1 à 7, caractérisé en ce que celui-ci est prévu sur un arbre d'outil (19) d'une machine-outil guidée à la main, notamment d'une perceuse-visseuse ou similaires et intégré côté avant dans l'arbre d'outil (19).
  9. Dispositif de serrage selon la revendication 8, caractérisé en ce que dans la zone de son extrémité (20) côté avant est prévu un logement de mandrin (21), le diamètre externe (D1) de la douille de verrouillage (13) est inférieur au diamètre externe (D2) du logement de mandrin (21).
EP04017796A 2003-08-14 2004-07-28 Dispositif de serrage pour embouts de tournevis hexagonaux Expired - Fee Related EP1506843B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10337470A DE10337470A1 (de) 2003-08-14 2003-08-14 Spanneinrichtung für Sechskantbits
DE10337470 2003-08-14

Publications (2)

Publication Number Publication Date
EP1506843A1 EP1506843A1 (fr) 2005-02-16
EP1506843B1 true EP1506843B1 (fr) 2008-06-11

Family

ID=33560328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04017796A Expired - Fee Related EP1506843B1 (fr) 2003-08-14 2004-07-28 Dispositif de serrage pour embouts de tournevis hexagonaux

Country Status (3)

Country Link
US (1) US7121774B2 (fr)
EP (1) EP1506843B1 (fr)
DE (2) DE10337470A1 (fr)

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TWM594510U (zh) * 2019-05-23 2020-05-01 鑽全實業股份有限公司 工具轉接頭快拆結構
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CN112943811B (zh) * 2021-01-28 2024-05-03 田士军 牵引式播种机播种旋转动力传输与切断转换器
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Also Published As

Publication number Publication date
US7121774B2 (en) 2006-10-17
DE10337470A1 (de) 2005-03-17
DE502004007348D1 (de) 2008-07-24
US20050036844A1 (en) 2005-02-17
EP1506843A1 (fr) 2005-02-16

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