Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
  • B23B31/02—Chucks
  • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
  • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
  • B23B31/1207—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
  • B23B31/123—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis with locking arrangements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
  • B23B31/02—Chucks
  • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
  • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
  • B23B31/1207—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
  • B23B31/1253—Jaws movement actuated by an axially movable member
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
  • B23B2231/38—Keyless chucks for hand tools
• • 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
  • Y10T279/17615—Obliquely guided reciprocating 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
  • Y10T279/00—Chucks or sockets
  • Y10T279/32—Means to prevent jaw loosening

Definitions

• the invention relates to a nachspannendes chuck with a Futterk ⁇ rper, a coaxial with the chuck body rotatable clamping cone axially supported on a chuck body mounted on the jaw holder in which are guided in guide slots clamping jaws, the
• Clamping and releasing by a relative rotation between the chuck body and the clamping cone with the jaw holder are adjustable, and having a coaxial with the chuck toothed ring on the one hand and a spring force in the ring gear engaging, mounted on the jaw holder pawl on the other hand
• Locking device which locks the chuck body and the pawl with relative to relative rotation in the sense of a release of the clamping jaws when engaging in the ring gear pawl, relative rotation in the sense of
• Tension but unhindered leaves and arranged with a coaxial with the chuck axis, rotatable from the outside release ring, which engages over the jaw holder for adjusting the pawl between the engaged in the sprocket and disengaged from the sprocket position.
• Clamping cone rotatably connected to the jaw holder, which in turn at the rear end fixed to the jaw holder is connected, which carries the pawl.
• the actuation of the pawl is effected by a rotation of the release ring and the operation of the jaws takes place by a rotation of the clamping sleeve (clamping cone), so that for loosening and tensioning of the chuck successively the release ring and the clamping sleeve must be adjusted in a coordinated manner.
• the invention is therefore based on the object
• Clamping cone disposed at its axially rearward end adjacent to the release ring and fixedly connected to the jaw holder, and that the release ring on its radially inner surface having a control cam for adjusting the pawl from the engaged position in the sprocket in the disengaged position upon rotation of the Loosening in the direction of rotation, which corresponds to the loosening of the clamping jaws when the clamping cone is rotated.
• the drill chuck according to the invention is initially characterized by its compact design with a short axial extension, which is achieved by the direct connection of the clamping cone with the jaw holder, so that this chuck according to the invention has this
• Drilling device easier to handle, in particular easier to hold, without having to compensate for the revolver grip of the drill a large torque due to the reduced top-heavy. Furthermore, the handling of the drill chuck is significantly simplified, as required for the operation of the chuck operations for loosening and clamping a rectified operation of the release ring and the clamping cone with the same direction of rotation require. This is achieved against the required orientation of the ring gear and cooperating with this pawl to lock a twist in the sense of loosening the jaws by the release ring a rotation of the pawl is generated, which is opposite to the direction of rotation of the release ring. Thus, if the release ring is turned left-handed, the pawl pivots in the right direction, this reversal of the direction of rotation is achieved by the interaction of the formed on the radially inner surface of the release ring control cam with the pawl.
• Release ring and the clamping cone can take together and also takes, so that the time sequence of the operation of the release ring and the clamping cone automatically results both during clamping and release.
• the pawl is formed as a two-armed lever with a first toothed lever having a ratchet and a second lever arm intended for engagement with the control cam, since then the second lever arm can be guided radially outward for extensive overlap with and large-scale system on the control curve.
• the second lever arm is curved, designed with the radially inwardly deflected free end. This curvature serves to achieve a large overlap of the control cam and thus a large guide length to a Rotation of the release ring to achieve a smooth transition of the pawl from the meshing engagement in the ring gear in the release position.
• a preferred embodiment of the invention is characterized in that at the free end of the second lever arm, a curved web is formed in the disengaged
• the second lever arm is designed to be longer than the first lever arm and on its spring-facing side has a recess for the installation of the spring. This can also be achieved by the second lever arm is designed concavely curved on the spring-facing side.
• FIG. 1 is a side view of the drill chuck according to the invention, shown on the left in section,
• Fig. 2 shows the section II-II of Fig. 1
• Fig. 2a is a representation corresponding to Figure 2 in the release position of the pawl, with a
• a chucking drill chuck which has a chuck body 1, and a coaxial with the chuck body 1 rotatable, axially supported on a jaw holder 2 on the chuck body 1 clamping cone 3, wherein to facilitate the rotation of the clamping cone 3 relative to the chuck body 1 and thus to Increasing the clamping force in rolling grooves 4 running rolling elements 5 between the chuck body 1 and the clamping cone 3 and the clamping cone 3 permanently associated jaw holder 2 are arranged.
• each of the drilling tool not shown here transmitted to the jaws 7 transmitted torque corresponding to the jaw holder 2 or as a radial force on the clamping cone 3.
• the clamping jaws 7 are supported against a driver 8, which is rotatable with a threaded bolt 9 in a central threaded bore 10 of the chuck body 1.
• the driver 8 and thus the threaded bolt 9 thus rotate relative to the chuck body 1 in the same manner as the jaw holder 2, the clamping cone 3 and the clamping jaws 7. If the clamping cone 3 is rotated relative to the chuck body 1, then learns correspondingly co-rotating threaded bolt 9 of the driver 8, depending on the direction of rotation, an axial advance or return adjustment, which in the first case, a clamping, in the second case, a release of the clamping jaws 7 result.
• a locking device 11 is provided between the chuck body 1 and the clamping cone 3 with a coaxial with the chuck axis 12 sprocket 13 on the one hand , which is formed in the illustrated embodiment on the chuck body 1, and with a jaw holder 2 mounted on the pawl 14 on the other hand, the chuck body 1 and the pawl 14 against the pawl 14 engaged in the ring gear 13 against
• the pawl 14 pressing into the ring gear 13 spring 15 is disposed in a bore 16 of the jaw holder 2, designed as a compression spring and associated with the second lever arm 17 formed as a two-armed lever pawl 14.
• the first lever arm 18 has to cooperate with the Sprocket 13 provided ratchet teeth 19.
• a control cam 21 for adjusting the pawl 14 from the indented into the ring gear 13 position in the disengaged position in a rotation of the release ring 20 in the direction of rotation the rotation of the Clamping cone 3 corresponds to the release of the clamping jaws 7.
• the second lever arm 17 of the pawl 14 is curved with the radially inwardly deflected free end, as shown in FIG. 2 can be seen.
• Fig. 2 also shows that on the outer peripheral surface of the jaw holder 2 and the inner peripheral surface of the release ring 20, the rotatability of the release ring 20 relative to the jaw holder 2 in both directions of rotation limiting stops 22/23 are formed.
• the second lever arm 17 is designed concavely curved on the spring 15 side facing.
• the release ring 20 is first to be engaged by the user to change the drilling tool and viewed counterclockwise from the front (FIG.
• the release ring 20 in the twisted opposite direction, ie clockwise, to reach the configuration shown in Fig. 2 again.
• This position of the pawl 14 is secured by the spring 15 when the user releases the release ring 20 adjacent to 22 to subsequently rotate the tensioning cone 3 for tensioning the drilling tool.
• the edge inclination of the teeth of the ring gear 13 is designed so that the pawl 14 can slide for clamping tooth to tooth, so that a retightening is not hindered by the meshing engagement during the drilling operation.

Applications Claiming Priority (1)

Publications (1)

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ID=35276237

Family Applications (1)

Country Status (6)

Families Citing this family (19)

Family Cites Families (26)

• 2005
  • 2005-03-19 JP JP2008502231A patent/JP4787314B2/ja not_active Expired - Fee Related
  • 2005-03-19 EP EP05730903A patent/EP1861220A1/de not_active Withdrawn
  • 2005-03-19 CN CN2005800491905A patent/CN101142047B/zh not_active Expired - Fee Related
  • 2005-03-19 WO PCT/DE2005/000517 patent/WO2006099820A1/de active Application Filing
  • 2005-03-19 DE DE112005003586T patent/DE112005003586A5/de not_active Withdrawn
  • 2005-05-17 US US11/131,475 patent/US7503565B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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