WO2017128813A1 - 夹头 - Google Patents

夹头 Download PDF

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Publication number
WO2017128813A1
WO2017128813A1 PCT/CN2016/105478 CN2016105478W WO2017128813A1 WO 2017128813 A1 WO2017128813 A1 WO 2017128813A1 CN 2016105478 W CN2016105478 W CN 2016105478W WO 2017128813 A1 WO2017128813 A1 WO 2017128813A1
Authority
WO
WIPO (PCT)
Prior art keywords
collet
positioning member
disposed
working head
claw
Prior art date
Application number
PCT/CN2016/105478
Other languages
English (en)
French (fr)
Inventor
谢明健
汪飞
闰尚亮
Original Assignee
苏州宝时得电动工具有限公司
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 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Priority to EP16887684.5A priority Critical patent/EP3409403B1/en
Priority to AU2016388991A priority patent/AU2016388991A1/en
Priority to JP2018539379A priority patent/JP6615372B2/ja
Priority to CA3012879A priority patent/CA3012879A1/en
Publication of WO2017128813A1 publication Critical patent/WO2017128813A1/zh
Priority to US16/047,137 priority patent/US10632544B2/en

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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
    • B23B31/1238—Jaws movement actuated by a nut with conical screw-thread
    • 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
    • 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
    • B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
    • B23B31/28—Chucks characterised by features relating primarily to remote control of the gripping means using electric or magnetic means in the chuck
    • 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
    • B23B2231/44—Nose pieces
    • 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
    • B23B2231/52—Chucks with means to loosely retain the tool or workpiece in the unclamped position
    • 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
    • Y10T279/26—Chucks or sockets with centering means

Definitions

  • the invention relates to the technical field of clamps for drilling tools for machining, and in particular to a collet.
  • the drill chuck When drilling, milling, etc. are used in production and processing activities, such as machine tools and electric drills, the chuck is often used to clamp the working head to improve the accuracy of drilling or milling.
  • the drill chuck is usually provided with a chuck body, a jaw, a jacket and a nut fixedly connected with the jacket.
  • the jaw is disposed in an inclined hole formed in the body, and drives the jaw and the nut thread through the relative rotation of the body and the sleeve. Cooperate to realize the telescopic movement of the jaws in the radial direction, thereby completing the clamping and releasing of the working head.
  • Chinese patent document CN 100493788C discloses a fast pre-tightening drill chuck comprising a drill body, three jaws and a nut.
  • the rear end of the drill body is provided with a shaft that engages with a drive shaft of the drive tool.
  • the front end of the drill body is provided with an axial hole for placing the shank of the drill bit, and the three clamping jaws are respectively installed in three equally slanted holes in the drill body, and the three-piece clamp is installed in the inclined hole of the drill body.
  • Claw engagement inside the axial hole of the front end of the drill body Three reeds are evenly mounted, and the three reeds are spaced apart from the center line of the three jaws by 60 degrees.
  • the center of the three reeds is located at the central axis of the axial hole at the front end of the drill body, and the front ends of the three reeds are naturally closed.
  • a sleeve fixedly connected thereto is disposed, and three reeds are fixed at the front end of the sleeve.
  • the pre-tightening force of the reed to the working head is small and unstable, and cannot ensure that the working head does not fall during the replacement process;
  • the reed since the reed is pre-tensioned by the natural closing force of its own elasticity, the reed deformation may occur during long-term use, the elastic variable is reduced, and the pre-tightening force is decreased, so that the diameter of the clamping shank cannot be compared.
  • the small working head performs alignment and pre-tightening; 3.
  • Another Chinese patent document CN 101284378A discloses a hand-held power tool which can be adsorbed and fixed on the jaws under the action of a magnetic force when the working head reaches the clamping position of the jaws, so as not to fall from the chuck device. Falling, a magnet is disposed on at least one of the jaws of the collet device, and a magnet is also disposed at the rear end of the working head. The arrangement of the magnets enhances the adsorption and fixation of the jaws and the working head.
  • the prior art has the following problems: 1. When a magnet is arranged on the claw, a slot is first formed in the claw, so that it is easy to reduce. The strength of the claws; 2.
  • the present invention solves the technical problems in the prior art and provides a chuck that is safe to operate.
  • a chuck comprising a jacket; a chuck body disposed in the outer casing and rotatable relative to the outer casing, the collet body defining a longitudinal axis in an extending direction; a claw disposed annularly around the longitudinal axis on the collet body and movably disposed relative to the collet body; a caliper adjustment structure disposed between the outer casing and the claw for adjusting the claw and a relative displacement of the collet body; the collet further comprising at least one positioning member and a positioning member pushing structure; the positioning member is disposed on the collet body and located between adjacent jaws, when the jacket is The collet body is relatively rotated, and when the caliber adjusting structure drives the claws to abut each other with respect to the longitudinal axis, the positioning member pushing structure pushes the positioning member to move toward the longitudinal axis; when the caliber is adjusted When the structure drives the jaws away from each other with respect to the longitudinal
  • the chuck body is formed with a first shaft cavity adapted to be mounted on the working head, and a sidewall of the collet body is formed with a plurality of rings that communicate with the first shaft cavity and are annularly distributed around the first axial cavity.
  • a second guiding portion communicating with the first shaft cavity is further disposed on a sidewall of the chuck body a hole, the positioning member protrudes into the first shaft cavity through the second guiding hole.
  • the centerline of the first shaft cavity is collinear with the longitudinal axis, and the first pilot hole is spaced from the projection of the second pilot hole on the longitudinal axis.
  • the outer sleeve rotates relative to the collet body in a first direction, and the positioning member protrudes into the first axial cavity from the second guiding hole and moves toward the longitudinal axis to be inserted into the first axial cavity.
  • the working heads are aligned; the claws respectively extend from the first guiding holes into the first shaft cavity and close to each other with respect to the longitudinal axis, thereby clamping the working head.
  • the positioning member corrects the working head before the jaw clamps the working head.
  • the outer sleeve rotates relative to the collet body in a second direction, the locating member moves away from the longitudinal axis, and the jaws are spaced apart from each other relative to the longitudinal axis, thereby releasing the working head.
  • the positioning member pushing structure comprises a first driving member sleeved on the chuck body, and converting the rotary motion of the first driving member relative to the chuck body into the first driving member along the clip A first transmission structure that reciprocates in the axial direction of the head body.
  • the first transmission structure includes a threaded structure disposed between an inner surface of the first drive member and an outer surface of the collet body.
  • the collet further includes a limiting structure disposed between the first driving member and the outer casing for preventing the first driving member from rotating relative to the outer casing.
  • the limiting structure includes a first guiding portion disposed on the first driving member and extending in an axial direction of the first driving member, and a first guiding portion disposed on an inner wall of the outer sleeve
  • the guiding second guiding portion, one of the first guiding portion and the second guiding portion is disposed as a guide rail, and the other of the first guiding portion and the second guiding portion may be disposed as a guiding groove for engaging the guide rail.
  • the keeper push structure further includes a first biasing member, the first biasing member acting on the locating member such that the locating member has a tendency to move away from the longitudinal axis.
  • the first driving member has an inclined abutting surface
  • the positioning member includes a matching portion that abuts against the inclined abutting surface and is used for extending Enter the support part of the first shaft cavity.
  • the biasing member is a spring sleeved on the supporting portion, the spring end abuts against the collet body, and the other end abuts against the stepped surface of the mating portion.
  • the positioning member pushing structure includes a second driving member that is coupled to the positioning member, and a second transmission mechanism that is coupled to the second driving member, the claws being selectable and second.
  • the driving member abuts and pushes the second driving member to move or is separated from the second driving member, and when the claw abuts against the second driving member and pushes the second driving member to move, the positioning member moves away from the longitudinal axis.
  • the positioning member pushing structure further comprises a second biasing member that provides a restoring force of the positioning member to move toward the longitudinal axis when the claw is separated from the second driving member.
  • the second transmission mechanism includes a transmission member coupled to the second driving member, and a support member fixedly disposed with respect to the chuck body, and the second biasing member is disposed between the transmission member and the support member.
  • the second biasing member is disposed as a spring, and the transmission member is provided with a first abutting portion, and the supporting member is provided with a second abutting portion for engaging a stop with the first abutting portion.
  • the positioning member is provided as an elastic positioning member, and the number of the elastic fixing members includes several.
  • the elastic positioning member includes an auxiliary portion, and an elastic pad disposed on the supporting portion away from the end of the positioning member pushing structure, and the elastic pad can provide an elastic supporting force for the working head.
  • the positioning member is configured as a magnetic positioning member.
  • the magnetic positioning member includes a supporting portion, and a magnet disposed on the supporting portion away from the end of the positioning member pushing structure, and the magnet corrects the working head through the adsorption working head.
  • the magnetic positioning member adjusts the working head while the claws abut each other to lock the working head.
  • the number of the positioning members includes a plurality, and the positioning members are arranged in accordance with the number of the claws.
  • the positioning member and the claw are respectively disposed offset.
  • the caliper adjustment structure includes an external thread formed on an outer wall of the jaw, and a nut disposed within the outer sleeve, the external thread engaging the nut.
  • the claw is obliquely disposed on the collet body, and the internal thread surface of the nut is a conical surface adapted to the inclination of the claw.
  • the outer sleeve includes a front sleeve and a rear sleeve that are mated with each other, and the nut is disposed between the rear sleeve and the collet body.
  • the inner wall of the rear sleeve is provided with a support ring for supporting the collet body.
  • an end face bearing is further disposed between the back sleeve and the collet body, one side of the end face bearing is disposed close to the nut, and the other side is provided with a gasket limit.
  • the invention adopts the above technical solution, overcomes the defects of the prior art drill chuck, the pre-tightening function of the pre-tightening structure is unstable, the correcting effect is poor, and the operation is unsafe, so that the working head is installed on the drill chuck.
  • the process of the head does not add extra manpower support action, which makes the operation more convenient and safe; and the correcting effect is accurate and reliable, and the pre-tightening force is stable.
  • FIG. 1 is an exploded perspective view of a collet according to a first embodiment of the present invention.
  • FIG. 2 is a structural schematic view of the jacket of the collet of FIG. 1 mated with a drive ring.
  • Figure 3 is a cross-sectional view showing the gripping port of the chuck shown in Figure 1 in a closed state.
  • Figure 4 is a cross-sectional view showing the grip opening of the chuck shown in Figure 1 in an open state.
  • Figure 5 is a cross-sectional view of the chuck shown in Figure 1 in a state in which the positioning member supports the working head, and the claw has not yet clamped the working head;
  • Figure 6 is a plan view showing the state in which the jaws and the positioning member of the collet shown in Figure 1 extend into the first axial cavity.
  • Figure 7 is a cross-sectional view of a collet provided in a second embodiment of the present invention.
  • Figure 8 is a plan view of the positioning member shown in Figure 7 extending into the first axial cavity.
  • Figure 9 is a cross-sectional view of a collet provided in a third embodiment of the present invention.
  • Figure 10 is a top plan view of the positioning member shown in Figure 9 extending into the first axial cavity.
  • Figure 11 is an exploded perspective view of a collet provided in a fourth embodiment of the present invention.
  • Figure 12 is a cross-sectional view showing the chuck holding port shown in Figure 11 in a closed state.
  • Figure 13 is a cross-sectional view showing the chuck holding port of Figure 11 in an open state, in which case the positioning member does not exit the first shaft cavity.
  • Figure 14 is a cross-sectional view of the collet chucking port of Figure 11 in an open state, with the positioning member having exited the first shaft cavity.
  • connection In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • Connected, or integrally connected can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
  • the present embodiment provides a collet 30 having an outer portion.
  • the sleeve 10 includes a front sleeve 10a and a rear sleeve 10b that are interconnected; the collet body 6 is located inside the outer casing 10 and is rotatable relative to the outer casing 10, the collet body 6 having a longitudinal axis X.
  • the front end of the chuck body 6 is formed with a first shaft cavity 6a adapted to mount the working head, and the center line of the first shaft cavity 6a is coaxially disposed with the longitudinal axis of the chuck body 6; the side wall of the chuck body 6 A plurality of first guiding holes 6b that communicate with the first shaft cavity 6a and are uniformly distributed in a ring shape around the first shaft cavity 6a are formed.
  • the first guide hole 6b of the present embodiment is provided with three (only one is shown in Fig. 1), but is not limited to three.
  • the first guide holes 6b are respectively provided for one of the claws 8 to telescope through.
  • One end of the claw 8 extends from the first guiding hole 6b into the first shaft cavity 6a, respectively, and the portion of the claw 8 that protrudes into the first shaft cavity 6a together forms a clamping opening for clamping the working head.
  • a guide groove 63 communicating with the first guiding hole 6b is obliquely disposed on the side wall of the chuck body 6.
  • the other end of the claw 8 protrudes from the first guiding hole 6a and is slidably received in the guiding groove 63.
  • the outer wall of the claw 8 is provided with an external thread 8a, and the inner side of the rear sleeve 10b is provided with a nut 5, the inner thread surface of the nut 5 is a conical surface, and the claw 8 is screwed with the nut 5.
  • the nut 5 and the rear sleeve 10b are connected in a rotationally fixed manner.
  • the claw 8 received in the guiding groove 63 is slipped relative to the nut 5, that is, the claw 8 is along the first guiding hole 6b.
  • the reciprocating motion in turn, expands or contracts the gripping opening so that the working head inserted into the first shaft cavity 6a can be clamped or released.
  • the nut 5 provided in the outer casing 10 and the external thread 8a of the claw 8 form a diameter adjusting structure capable of adjusting the size of the grip opening of the claw 8.
  • the outer casing body 6 rotates the outer casing 10
  • the outer casing 10 drives the nut 5 to rotate
  • the nut 5 drives the claw 8 to reciprocate in the first guiding hole 6a, or rotates the collet body 6 relative to the outer casing 10, and the claw 8 follows the clamp.
  • the head main body 6 reciprocates in the first guide hole 6b while rotating.
  • the sidewall of the collet body 6 is further provided with at least one second guiding hole 6c communicating with the first shaft cavity 6a.
  • the second guiding hole 6c is for accommodating the positioning member 7; the second guiding hole 6c of the embodiment is uniformly distributed around the first axial cavity 6a in an annular shape and is disposed offset from the first guiding hole 6b, and the number of the second guiding holes 6c is Consistent with the number of the first guiding holes 6b, there are three; the second guiding holes 6c are disposed adjacent to the first guiding holes 6b near the front cover 10a, and the projection distance of the second guiding holes 6c and the first guiding holes 6b on the longitudinal axis X .
  • a positioning member pushing structure is disposed between the front sleeve 10a and the chuck body 6, and the positioning member pushing structure includes the driving member 9.
  • the driving member 9 of the embodiment has a flared ring sleeve, that is, the driving ring 9 has two large and small opening portions, wherein the smaller opening portion is adjacent to the front sleeve 10a, and the larger opening portion is adjacent to the rear sleeve 10b.
  • the drive ring 9 is disposed coaxially with the collet body 60. Referring to Fig.
  • an inclined abutting surface 9b is provided between the larger opening portion and the smaller opening portion, and one end of the positioning member 7 is inserted into the second guiding hole 6c, and the other end abuts against the inclined abutting surface 9b, and can be inclined
  • the pushing surface 9b is pushed into the first shaft cavity 6b.
  • a limited structure is disposed between the outer sleeve 10 and the driving ring.
  • the limiting structure includes a first guiding portion disposed on the driving ring 9 and a second guiding portion disposed on the front sleeve 10a, wherein the first guiding portion is adjacent to the driving ring At the outer edge of the larger opening portion of 9, the number is provided at least one; the second guiding portion is correspondingly disposed on the inner wall of the front cover 10a.
  • One of the first guiding portion and the second guiding portion may be provided as a guide rail 12, and the other of the first guiding portion and the second guiding portion may be provided as a guide groove 13 that engages with the guide rail.
  • the first guiding portion of the embodiment is a guiding groove 13, and the second guiding portion is a guide rail 12.
  • the number of the guiding groove 13 and the guiding rail 12 respectively includes two and is disposed at 180 degrees.
  • the guide groove 13 may also be provided in the circumferential direction of the inner wall of the front sleeve 10a.
  • the guide groove 13 is parallel to the axis of the drive ring 9 to define the upper and lower reciprocating motion of the drive ring 9 along the guide groove 13 in the axial direction.
  • the front sleeve 10a is mated with the drive ring 9 such that when the outer sleeve 10 and the collet body 6 are relatively rotated,
  • the drive ring 9 is connected to the front cover 10a in a rotationally fixed manner.
  • the positioning member 7 is located between the driving ring 9 and the chuck body 6.
  • the inner side wall of the driving ring 9 near the small opening is provided with an internal thread 9a.
  • the chuck body 6 is provided with an external thread 61, and the driving ring 9 is sleeved on the clip.
  • the head body 6 is threadedly coupled to the collet body 6.
  • the positioning member 7 includes an engaging portion 71 that abuts against the pushing surface 9b of the driving ring 9, and a supporting portion 72 that can extend into the second guiding hole 6c to extend toward the first shaft cavity 6a.
  • a reset biasing member is disposed between the mating portion 71 and the supporting portion 72.
  • the mating portion 71 approaches the tilting abutting surface 9b of the driving ring 9 by the reset biasing member, and the reset biasing member of the present embodiment is disposed.
  • the spring 14 is sleeved on the portion of the supporting portion 72 that protrudes from the second guiding hole 6c. One end of the spring 14 abuts against the matching portion 71, and the other end abuts against the side wall of the chuck body 6.
  • the front sleeve 10a drives the drive ring 9 to move toward the rear sleeve 10b; during the movement of the drive ring 9, the drive ring 9 is inclined against the push surface 9b. Abutting thrust is formed on the positioning member 7.
  • the engaging portion 71 of the positioning member 7 feeds the supporting portion 72 into the first shaft cavity 6a through the second guiding hole 6c against the elastic force of the spring 14 under the action of the thrust force, and enters the first shaft.
  • the support portion 72 of the cavity 6a moves toward the center of the first shaft cavity 6a.
  • the inclined abutting surface 9b is at an angle with the axis of the second guiding hole 6c to ensure that the pushing force can push the positioning member 7 into the first shaft cavity 6a.
  • the positioning member 7 can be driven by the elastic restoring force of the spring 14 to be reset and retracted away from the clamping opening along the second guiding hole 6c as the tilting abutting surface moves upward to release the working head 15 Support.
  • the aperture is adjusted.
  • the caliber of the structure gripping port is contracted, and the supporting portion 72 of the positioning member 7 is simultaneously moved from the second hole toward the hole 6c toward the center of the first shaft cavity 6a by the positioning member, so that the first shaft cavity 6a can be inserted.
  • the working head 15 is pushed to the center of the gripping port for clamping by the claws 8.
  • the caliber of the gripping opening is due to the jaws 8
  • the retraction is enlarged, and the support portion 72 of the positioning member 7 is withdrawn from the center of the gripping port by the forward movement of the drive ring 9 and under the restoring force of the spring 14 from the center of the grip port.
  • the outer sleeve 10 and the collet body 6 are relatively rotated, and the caliber adjusting structure and the positioning member pushing structure can be simultaneously moved.
  • the movement of the positioning member push structure causes the positioning member 7 to push the working head 15 inserted into the first shaft cavity 6a to the center of the clamping opening, that is, to correct the working head 15 inserted into the first axial cavity 6a; the movement of the diameter adjusting structure
  • the clamping port formed by the claw 8 is contracted; the correcting action of the positioning member 7 on the working head 15 occurs before the clamping opening of the claw 8 is reduced until the working head 15 is locked, so that the claw 8 can be clamped.
  • the working head 15 at the center of the mouth performs reliable clamping.
  • the embodiment of the present invention provides a working head holding device disposed in the collet housing 10, and automatically corrects the working head 15 during the process of locking the working head 15 by the claw 8. It avoids the phenomenon of pinching which may occur when the jaw 8 is clamped alone, which reduces the operation difficulty and improves the user experience.
  • the positioning member 7 in the embodiment of the present invention is provided as an elastic positioning member 7s, and the supporting portion 72 is preferably an elastic supporting portion; preferably, the end portion of the supporting portion 72 extending into the first axial cavity
  • the elastic pad 72a is provided, and the elastic pad 72a is preferably an elastic rubber pad.
  • the number of the elastic positioning members 7s in the present embodiment is the same as the number of the claws 8, and is respectively arranged offset from the claws, between the three claws 8 and between the three elastic supporting portions 72.
  • the directions are 120 degrees respectively.
  • the elastic supporting portion 72 is formed by the second guiding hole 6c extending into the end portion of the first shaft cavity 6a to be a curved surface, and the three arc surfaces are surrounded by a circular supporting opening, and the supporting opening and the claw 8 are enclosed.
  • the clamping port is centered. It should be noted that the elastic positioning member 7s first supports the working head 15 to the clamping center of the clamping opening before the clamping port is locked, and then passes the elastic rubber pad while the locking claw 8 locks the working head 15. The extrusion deformation continues to apply elastic support to the working head 15.
  • the rear end of the chuck body 6 is also formed with a second shaft cavity 62 adapted to mount a drive shaft, which may be a drive shaft of the drill gun.
  • the drive shaft is coupled to the chuck body 6 through the second shaft cavity 62, and can mechanically drive the chuck body 6 to rotate synchronously with the drive shaft.
  • the positioning member pushing structure is a pushing driving structure, and the pushing driving structure is rotated in the first direction relative to the chuck body 6 or the chuck body 6 is opposite.
  • the drive 10 drives the lower positioning member 7 in a second direction opposite to the first direction to drive the working head 15 inserted into the first axial cavity 6a to the center of the clamping opening; the biasing member is reset, and the force is applied On the positioning member 7, the positioning member 7 has a tendency to be reset away from the center direction of the holding opening.
  • the movement of the positioning member 7 toward the center of the clamping opening is driven by the push drive structure away from the middle of the clamping opening
  • the movement of the heart is driven by the reset biasing member, which makes the positioning member push structure simpler and easier to implement.
  • the telescopic adjustment of the positioning member 7 makes the clamping force formed by the positioning member 7 on the working head 15 adjustable, and can be applied to the righting and positioning of the working head 15 of different sizes, and the applicability is stronger; and the positioning member 7 is formed.
  • the clamping port is in an open state when the working head 15 is not clamped, which is more advantageous for the natural insertion of the working head 15, and the clamping structure is stable and not easily deformed.
  • the push drive structure includes a drive ring 9 sleeved on the chuck body 6, and a first transmission structure that converts the rotary motion of the chuck body 6 into a drive drive ring 9 to reciprocate in the axial direction of the chuck body 6, preferably
  • the first transmission structure includes a threaded structure disposed between the inner surface of the drive ring 9 and the outer surface of the collet body 6, and a limit structure disposed between the drive ring 9 and the inner wall of the outer casing 10 to prevent rotation of the drive ring 9. .
  • the operation process of the chuck provided by the embodiment is as follows: as shown in FIG. 2, when the working head 15 is inserted into the first shaft cavity, the chuck body 6 and the outer sleeve 10 are relatively rotated by the mechanical shaft, and the driving drive ring 9 is driven.
  • the threaded body of the second guide hole 6c is moved downward by the threaded engagement with the chuck body 6 and by the limit structure between the inner wall of the front sleeve 10a and the inner wall of the front sleeve 10a.
  • the inner wall of the rear cover 10b is provided with a support ring 2 for supporting the collet body 6.
  • An end face bearing 4 is further disposed between the head bodies 6, and one side of the end face bearing 4 is disposed close to the nut 5, and the other side is provided with a gasket 3 for limiting.
  • Figure 7 is a cross-sectional view of a collet provided in a second embodiment of the present invention
  • Figure 8 is a plan view of the positioning member shown in Figure 7.
  • This embodiment as an alternative to the first embodiment, provides a collet that differs from the first embodiment in that:
  • the positioning member in the present embodiment is a magnetic positioning member 7a.
  • the number of the magnetic positioning members 7a is only one, and is disposed opposite to one of the claws 8. Therefore, the claw 8 and the magnetic positioning member 7a can abut against the working head in two opposite directions, and the alignment effect is more precise.
  • the magnetic positioning member 7a includes the supporting portion 74, and the protruding portion 74 is disposed in the first axial cavity.
  • the inner end of the magnet 11 for absorbing the working head 15 is made of a metal material. By providing the magnet 11 on the supporting portion 74, the working head 15 is magnetically inserted when inserted into the first axial cavity.
  • the action is automatically adsorbed on the supporting surface of the positioning member 7a, and then the working head 15 is pushed by the positioning member 7a toward the center of the clamping mouth of the claw 8, which not only improves the accuracy of the automatic alignment of the working head 15, but also enhances the magnetic attraction.
  • the work head 15 is initially fixed to prevent the work head 15 from falling.
  • the working head is not made of a metal material, it can also be solved by providing a magnet on the working head.
  • the number of the magnetic positioning members 7a is not limited to one, and may be set to three, respectively disposed opposite to the claws 8, which can effectively prevent the deviation of the working head 15 from being inserted into the gap between the adjacent claws 8,
  • the pitch between the drive ring 9 and the chuck body 6 in the present embodiment is the same as the pitch between the claw 8 and the nut 5, so that when the chuck body 6 is rotated, the drive positioning member 7 and the claw 8 are moved in synchronization.
  • the operation process of the chuck provided by the present embodiment is as follows: when the working head 15 is inserted into the first shaft cavity 6a The magnetic force is attracted to the magnetic end of the magnetic positioning member 7a. At this time, the chuck body 6 is driven to rotate relative to the outer sleeve 10 by the driving shaft, and the driving claw 8 is driven to the center of the clamping opening while driving the driving ring 9 downward.
  • the movement of the magnetic positioning member 7a forms an abutting force toward the first axial cavity 6a, so that the magnetic positioning member 7a pushes the working head 15 to move toward the center of the clamping opening, and the clamping opening is received while the working head 15 reaches the center of the clamping opening Tightening to form the locking and fixing of the working head 15 by the claws 8.
  • Figure 9 is a cross-sectional view of a collet provided in a third embodiment of the present invention.
  • Figure 10 is a plan view of the positioning member shown in Figure 9.
  • This embodiment as an alternative to the first embodiment, provides a collet that differs from the first embodiment in that:
  • the positioning member is disposed opposite to the claw 8 in the embodiment, the number of the positioning member is consistent with the number of the claws 8, and the positioning member includes a magnetic positioning member 7a and a non-magnetic positioning member 7b, wherein the magnetic positioning member 7a includes a supporting portion 74, and a magnet 11 for adsorbing the working head 15 disposed at an end of the supporting portion 74 extending into the first axial cavity, the non-magnetic positioning member 7b including an auxiliary portion.
  • the number of the claws 8 and the positioning members in the embodiment is preferably set to three, wherein the positioning member can be arranged in a magnetic positioning member 7a and two elastic positioning members 7s, wherein
  • the elastic positioning member 7s includes a supporting portion 72, and an elastic pad 72a provided on an end portion of the supporting portion 72 that protrudes into the first axial cavity.
  • the working head 15 is provided with magnetic attraction and elastic preloading force, so that the working head 15 can be automatically aligned and magnetically attracted to the positioning member. 7 to prevent falling.
  • the elastic positioning member 7s of the present embodiment can be replaced with the non-magnetic positioning member 7b.
  • FIG. 11 to 14 show a chuck 30a provided in a fourth embodiment of the present invention.
  • the collet 30a of the present embodiment has a similar working principle as the collet 30 of the first embodiment, and the same structures are denoted by the same reference numerals and will not be described again.
  • the outer casing 10 of the present embodiment is integrally provided, and the chuck body 6 is housed inside the outer casing 10.
  • the chuck body 6 is movably provided with a claw 8 and a positioning member 7, the number of the positioning members 7 and the number of the claws 8. Consistent, there are three settings.
  • a nut 5 is disposed between the outer sleeve 10 and the collet body 6, and the internal thread of the nut 5 meshes with the external thread 8a of the claw.
  • the nut 5 is disposed inside the support member 51, and the nut 5 is connected to the outer sleeve 10 without a relative rotation by the support member 51.
  • the positioning member 7 includes a supporting portion 72 and a first mating portion 71a.
  • the first mating portion 71a includes a main body portion and a protrusion extending from the main body portion to both sides.
  • the positioning member pushing structure of the embodiment is disposed inside the outer casing 10 and near the rear end of the chuck body 6.
  • the positioning member pushing structure includes a driving member 92 coupled with the positioning member 7, and a second transmission mechanism connected to the driving member.
  • the second transmission mechanism includes a transmission member 94, an elastic member 96, and a support member 98; wherein the driving member 92 is provided with a flange portion, and the transmission member 96 is sleeved on the flange portion of the driving member 92, and the transmission member 96 passes through
  • the retaining spring 97 is mated with the drive member 92 in a rotationally fixed manner.
  • the driving member 94 is provided with a second mating portion for mating with the first mating portion 71a of the positioning member 7.
  • the second mating portion 94a of the embodiment is configured as a card slot, and the card slot is located at the first matching portion.
  • the main body portion between the two extending projections of the joint portion 71a is engaged.
  • the support member 98 is fixedly disposed with respect to the outer sleeve 10, and the elastic member 96 is disposed between the transmission member 94 and the support member 98.
  • One end of the elastic member 96 abuts against the support member 98, and the other end abuts against the transmission member 94 through the spacer 95.
  • a first abutting portion 94a is disposed on the end surface of the transmission member 94 toward the support member 98, and a second abutting portion 98a is disposed on the end surface of the support member 98 toward the transmission member 94.
  • the collet 30a is in a non-operating state, the working head has been removed from the gripping opening, and the claws 8 are extended.
  • the clamping ends of the first axial cavity 6 are close to each other; the positioning member 7 projects into the first axial cavity 6a and moves closer to the center of the clamping opening.
  • the elastic member 96 is in an extended state.
  • the rear end of the body 6 is moved such that the elastic member 96 is compressed, and the support portion 72 of the positioning member 7 is gradually removed from the first shaft cavity 6a by the action of the driving member 92.
  • the working head (not shown) can be inserted into the grip opening formed by the claw 8 from the first shaft cavity 6a, and the holding opening formed by the positioning member 7.
  • the claws 8 are gradually moved toward the collet body 6 during the rotation, and the transmission member 94 is acted upon by the elastic restoring force of the elastic member 96.
  • the rear end of the collet body 6 is moved toward the front end thereof, so that the driving member 92 drives the positioning member 7 to move from the second hole toward the hole 6c toward the center of the first shaft cavity 6a, so that the first shaft cavity can be inserted.
  • the working head in 6a is pushed to the center of the gripping port for clamping by the claws 8.
  • the movement of the positioning member push structure causes the positioning member 7 to push the working head inserted into the first shaft cavity 6a to the center of the clamping opening for righting; the movement of the diameter adjusting structure causes the clamping opening formed by the claw 8 to contract and thereby clamp the claw 8 can be in the center of the grip
  • the working head 15 performs reliable clamping.
  • the mechanical shaft is linked to the collet body 6 to rotate relative to the outer casing 10 such that the supporting portion 72 of the positioning member 7 pushes the working head toward the center of the clamping opening; and the claw 8 is received by the collet body 6 and the outer casing 10.

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  • Manipulator (AREA)

Abstract

一种夹头（30），包括外套（10）、夹头本体（6）、若干卡爪（8）、口径调节结构，用于调节所述卡爪（8）与夹头本体（6）的相对位移；夹头（30）还包括至少一个定位件（7）和定位件推动结构；所述定位件（7）设置于所述夹头本体（6）上且位于相邻的夹爪（8）之间，所述外套（10）与夹头本体（6）相对旋转，当所述口径调节结构驱动所述卡爪（8）相对夹头本体（6）的纵轴线相互靠拢时，所述定位件推动结构推动所述定位件（7）向靠近所述纵轴线方向移动；当所述口径调节结构驱动所述卡爪（8）相对所述纵轴线相互远离时，所述定位件推动结构推动所述定位件（7）远离所述纵轴线方向移动；从而使得操作更加方便、安全；并且找正效果精准可靠、预紧力稳定。

Description

夹头 技术领域
本发明涉及机械加工用钻具的夹具技术领域，具体涉及一种夹头。
背景技术
在生产加工活动中使用机床和电钻等工具进行钻孔、铣削等作业时，经常使用钻夹头对工作头进行夹持定位，以提高钻孔或者铣槽的精准性。钻夹头通常设有夹头本体、夹爪、外套以及与外套固定连接的螺母，夹爪设于成型于本体内的倾斜孔内，通过本体与外套的相对转动，驱动夹爪与螺母的螺纹配合以实现夹爪在径向上的伸缩运动，从而完成对工作头的夹持与释放。然而在实际操作中，为了确保工作头位于夹持部的夹持中心，在工作头的更换过程中，常需要作业人员用手或者其他工具对工作头进行扶持，直至夹爪对工作头施以一定作用力才能松手，极不方便，尤其当工作头尺寸较小，夹爪移动距离较大时，操作人员需要长时间扶持工作头，找正、对中，且在环境恶劣的室外作业中，使用者的操作灵活性降低，不能将工作头迅速对准钻夹头的夹持部，需要反复对准，费时费力。对于由马达旋转驱动本体相对外套旋转，实现对工作头进行夹紧的这一种操作模式，由于外套相对工具静止，本体由马达驱动进行高速旋转，工作头容易受到撞击而直接被抛出，对扶持工作头的作业人员造成伤害。
现有技术中，中国专利文献CN 100493788C公开了一种快速预紧的钻夹头，包括钻体、三片夹爪和丝母，钻体的后端设有与驱动工具的驱动轴接合的轴向孔，钻体前端设有放置钻头柄部的轴向孔，三片夹爪分别安装在钻体中三个等分的斜孔内，丝母与安装在钻体斜孔中的三片夹爪啮合，钻体前端的轴向孔内 均匀安装了三片簧片，三片簧片与三片夹爪中心线相差60度间隔分布，三片簧片的中心位于钻体前端轴向孔中心轴线，三片簧片的前端呈自然闭合状，钻体前端的轴向孔内还设置了与其固定连接的套筒，三片簧片固定在套筒前端。通过簧片的设置，使得更换工作头时，可以直接将工作头的夹持柄插入簧片形成的夹持口中，通过簧片的自身弹力对工作头自然夹持、找正，无需再用手扶持工作头。然而，该现有技术还存在以下问题：1、该现有技术中簧片对工作头的预紧力力度较小且不稳定，不能确保工作头更换过程中不掉落；2、该现有技术中由于所设簧片依靠自身弹性的自然闭合力对工作头预紧，在长期使用过程中有可能出现簧片变形，弹性变量缩小，预紧力下降，致使无法对夹持柄直径尺寸较小的工作头进行找正、预紧；3、该现有技术中装卸工作头时，由于簧片的夹持口初始状态为自然闭合，且簧片处于钻体内，因此工作头不易对准簧片的夹持口，当工作头的夹持柄直径尺寸较小，很有可能将工作头的夹持柄插入到夹持口与轴向孔的孔壁之间的间隙中，导致簧片的找正、预紧作用失效，甚至在没有及时发现的情况下夹爪锁紧定位致使工作头损坏断裂。
另一篇中国专利文献CN 101284378A公开了一种手持式动力工具，其为了当工作头到达夹爪的夹持位置时能够在磁力作用下吸附固定在夹爪上，不至于从夹头装置中掉落，在夹头装置的至少一个夹爪上设置有磁铁，并且工作头后端也设置有磁铁。通过磁铁的设置使得夹爪与工作头的吸附固定作用得以增强，然而，该现有技术中存在以下问题：1、在卡爪上设置磁铁，需先在卡爪上开设槽孔，因此容易降低卡爪的强度；2、在体积较小的卡爪上开设槽孔，并将磁铁固定在槽孔内，工艺性不太容易实现；3、每个卡爪的夹持面均是成120度的尖 角，因此，当工作头插入且处于夹持面一侧时，容易导致工作头吸偏，从而不利于工作头的找正与夹持。
发明内容
本发明要解决了现有技术中的技术问题，提供一种操作安全的夹头。
本发明采用的技术方案如下：一种夹头，包括外套；夹头本体，设置于所述外套内且可与所述外套相对旋转,所述夹头本体于延伸方向上定义一纵轴线；若干卡爪，围绕所述纵轴线呈环状分布于所述夹头本体上且相对夹头本体活动设置；口径调节结构，设置于所述外套和卡爪之间，用于调节所述卡爪与夹头本体的相对位移；所述夹头还包括至少一个定位件和定位件推动结构；所述定位件设置于所述夹头本体上且位于相邻的夹爪之间，当所述外套与夹头本体相对旋转，所述口径调节结构驱动所述卡爪相对所述纵轴线相互靠拢时，所述定位件推动结构推动所述定位件向靠近所述纵轴线方向移动；当所述口径调节结构驱动所述卡爪相对所述纵轴线相互远离时，所述定位件推动结构推动所述定位件远离所述纵轴线方向移动。
进一步地，夹头本体上成型有适于安装工作头的第一轴腔，所述夹头本体的侧壁上成型有若干与第一轴腔相通且围绕第一轴腔呈环状分布的第一导向孔，所述卡爪分别通过所述第一导向孔伸入所述第一轴腔内；所述夹头本体的侧壁上还设有与所述第一轴腔相通的第二导向孔，所述定位件通过所述第二导向孔伸入第一轴腔内。
优选地，第一轴腔的中心线与所述纵轴线共线，所述第一导向孔与第二导向孔于纵轴线上的投影相间隔。
优选地，外套相对夹头本体沿第一方向旋转，所述定位件由第二导向孔伸入所述第一轴腔并向靠拢所述纵轴线方向移动至将插入所述第一轴腔中的工作头扶正；所述卡爪分别由第一导向孔伸入所述第一轴腔并相对所述纵轴线相互靠拢，从而将所述工作头进行夹紧。
优选地，定位件在所述卡爪夹紧所述工作头之前扶正所述工作头。
所述外套相对夹头本体沿第二方向旋转，所述定位件向远离所述纵轴线方向移动，所述卡爪相对所述纵轴线相互远离，从而释放所述工作头。
优选地，所述定位件推动结构包括套设在所述夹头本体上的第一驱动件，以及将所述第一驱动件相对夹头本体的旋转运动转换为第一驱动件沿所述夹头本体的轴向方向往返运动的第一传动结构。
优选地，所述第一传动结构包括设置在第一驱动件的内表面与所述夹头本体的外表面之间的螺纹结构。
优选地，所述夹头还包括设置于第一驱动件与外套之间设置的限位结构，用于阻止所述第一驱动件相对所述外套旋转。所述限位结构包括设置于所述第一驱动件并沿所述第一驱动件轴向方向延伸的第一导向部，以及设置于所述外套的内壁上的与所述第一导向部配合导向的第二导向部，所述第一导向部与第二导向部其中之一设置成导轨，第一导向部与第二导向部其中之另一个可以设置成与导轨啮合的导槽。
优选地，所述定位件推动结构还包括第一偏压件，所述第一偏压件作用在所述定位件上，使所述定位件具有远离所述纵轴线的趋势。所述第一驱动件具有一倾斜抵推面，所述定位件包括与所述倾斜抵推面相抵的配接部以及用于伸 入第一轴腔的扶持部。
优选地，偏压件为套设在所述扶持部上的弹簧，所述弹簧一端抵住所述夹头本体，另一端抵住所述配接部的台阶面。
另一种可替换的方案中，所述定位件推动结构包括与定位件配接的第二驱动件，以及与第二驱动件配接的第二传动机构，所述卡爪可选择与第二驱动件抵接并推动第二驱动件移动或者与第二驱动件分离，当卡爪与所述第二驱动件抵接并推动第二驱动件移动时，所述定位件向远离纵轴线移动。
优选地，所述定位件推动结构还包括第二偏压件，当所述卡爪与第二驱动件分离时，所述第二偏压件提供定位件向靠近纵轴线方向移动的回复力。第二传动机构包括与第二驱动件配接的传动件、相对夹头本体固定设置的支撑件，所述第二偏压件设置于传动件与支撑件之间。所述第二偏压件设置为弹簧，所述传动件设置有第一抵接部,所述支撑件上设置有用于与第一抵接部配合止挡的第二抵接部。
优选地，定位件设置成弹性定位件，所述弹性定件数量包括若干个。所述弹性定位件包括扶持部，以及设置在所述扶持部上远离所述定位件推动结构端部的弹性垫,所述弹性垫能够为工作头提供弹性扶持力。
另一种可替换的方案中，定位件设置成磁性定位件。所述磁性定位件包括扶持部，以及设置在在所述扶持部上远离所述定位件推动结构端部的磁铁，所述磁铁通过吸附工作头对工作头进行扶正。所述磁性定位件对工作头进行扶正的同时卡爪相互靠拢锁紧工作头。
优选地，定位件的数量包括若干，所述定位件与所述卡爪的数量设置一致。 所述定位件与所述卡爪分别错位设置。
优选地，口径调节结构包括成型在所述卡爪的外壁上的外螺纹，以及设置于所述外套内的螺母，所述外螺纹与所述螺母啮合。
优选地，卡爪倾斜设置在所述夹头本体上，所述螺母的内螺纹面为与所述卡爪的倾斜度相适应的圆锥面。
一种方案中，所述外套包括相互配接的前套和后套，所述螺母设于所述后套与所述夹头本体之间。
优选地，所述后套的内壁上设有支撑所述夹头本体的支撑圈。
优选地，所述后套与所述夹头本体之间还设有端面轴承，所述端面轴承的一侧紧贴所述螺母设置，另一侧设置垫圈限位。
本发明由于采用了上述技术方案，克服了现有技术中钻夹头的找正、预紧结构预紧作用不稳定、找正效果差、操作不安全的缺陷，使得工作头在安装于钻夹头的过程没有增加额外的人力扶持动作，使得操作更加方便、安全；并且找正效果精准可靠、预紧力稳定。
附图说明
图1为本发明第一实施方式的夹头的立体分解图。
图2为图1中夹头的外套与驱动环配合的结构示意图。
图3为图1所示夹头的夹持口处于闭合状态的剖视图。
图4为图1所示夹头的夹持口处于张开状态的剖视图。
图5为图1所示夹头处于定位件扶持工作头，卡爪尚未夹紧工作头状态的剖视图；
图6为图1所示夹头的卡爪与定位件伸入第一轴腔状态的俯视图。
图7为本发明第二实施方式提供的夹头的剖视图。
图8为图7所示的定位件伸入第一轴腔的俯视图。
图9为本发明第三实施方式中提供的夹头的剖视图。
图10为图9所示的定位件伸入第一轴腔的的俯视图。
图11为本发明第四实施方式中提供的夹头的立体分解图。
图12为图11所示的夹头夹持口处于闭合状态的剖视图。
图13为图11所示的夹头夹持口处于张口状态的的剖视图，此时定位件未退出第一轴腔。
图14为图11所示的夹头夹持口处于张口状态的的剖视图，此时定位件已退出第一轴腔。
其中，
10-外套                6-夹头本体            74-扶持部
10a-前套               6a-第一轴腔           8-卡爪
10b-后套               6b-第一导向孔         8a-外螺纹
11-磁铁                6c-第二导向孔         9-驱动环
12-导轨                62-第二轴腔           9a-内螺纹
13-导槽                63-导向凹槽           9b-倾斜抵推面
14-弹簧                7-定位件              92驱动件
15-工作头；            7a-磁性定位件         94传动件
2-支撑圈               7b-无磁性定位件       96弹性件
3-垫圈                 7s-弹性定位件         98支撑件
30,30a-自动扶正夹头    71-配接部             97卡簧
4-端面轴承             71a第一配接部         94a第一抵接部
5-螺母                 72-扶持部              98a第二抵接部
51-支撑件              72a-弹性垫
具体实施方式
下面将结合附图对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的描述中，需要说明的是，术语“前”、“后”、“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
此外，下面所描述的本发明不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。
第一实施例
参照图1个至图4所示，本实施方式提供的一种夹头30，该夹头30具有外 套10，外套10包括相互连接的前套10a和后套10b；夹头本体6位于外套10内部且与外套10可相对地转动，夹头本体6具有一纵向轴线X。其中，夹头本体6的前端成型有适于安装工作头的第一轴腔6a，第一轴腔6a的中心线与夹头本体6的纵轴线同轴设置；夹头本体6的侧壁上成型有多个与第一轴腔6a相通、且围绕第一轴腔6a呈环状均匀分布的第一导向孔6b。本实施例的第一导向孔6b设置有三个(图1仅示出一个)，但不限于三个。第一导向孔6b分别用于供一个卡爪8在其中伸缩穿行。卡爪8的一端分别自第一导向孔6b伸入第一轴腔6a，卡爪8伸入第一轴腔6a内的部分共同形成用于夹持工作头的夹持口。夹头本体6的侧壁上倾斜地设置有与第一导向孔6b连通的导向凹槽63，卡爪8另一端自第一导向孔6a伸出且可滑移地收容于导向凹槽63内。卡爪8的外壁上设置有外螺纹8a，后套10b内侧设置有螺母5，螺母5的内螺纹面为圆锥面，卡爪8与螺母5之间螺纹配合。螺母5与后套10b无相对转动地连接，当外套10相对夹体本体6旋转时，收容于导向凹槽63的卡爪8相对螺母5产生滑移，即卡爪8沿第一导向孔6b往复运动，进而使夹持口扩大或收缩，使得能对插入于第一轴腔6a的工作头进行夹紧或释放。
设置于外套10内的螺母5与卡爪8的外螺纹8a形成了能对卡爪8的夹持口大小进行调节的口径调节结构。具体地，相对夹头本体6旋转外套10，外套10带动螺母5转动，螺母5驱动卡爪8在第一导向孔6a中往复移动；或者相对外套10转动夹头本体6，卡爪8随夹头本体6一边旋转一边在第一导向孔6b中往复移动。
夹头本体6的侧壁上还设有至少一个与第一轴腔6a相通的第二导向孔6c， 第二导向孔6c内用于容纳定位件7；本实施例的第二导向孔6c围绕第一轴腔6a呈环状均匀分布且与第一导向孔6b错开设置，第二导向孔6c的数量与第一导向孔6b数量一致，均有三个；第二导向孔6c相对第一导向孔6b靠近前套10a设置，第二导向孔6c与第一导向孔6b在纵轴线X上的投影的间距。
前套10a与夹头本体6之间设置有定位件推动结构，定位件推动结构包括驱动件9。本实施例的驱动件9呈一喇叭状的环套，即驱动环9，具有大、小两个开口部，其中较小的开口部靠近前套10a，较大的开口部靠近后套10b，驱动环9与夹头本体60同轴设置。参照图2，较大开口部与较小开口部之间具有倾斜抵推面9b，定位件7一端插入第二导向孔6c内，另一端与倾斜抵推面9b相抵接，并可在倾斜抵推面9b的抵推作用下伸入第一轴腔6b内。
外套10与驱动环之间设置有限位结构，具体地，限位结构包括设置于驱动环9的第一导向部，以及设置于前套10a的第二导向部，其中第一导向部靠近驱动环9的较大开口部的外边缘处，数量为设置有至少一个；第二导向部对应地设置于前套10a的内壁上。第一导向部与第二导向部其中之一可以设置成导轨12，第一导向部与第二导向部其中之另一个可以设置成与导轨啮合的导槽13。
参照图2，本实施例的第一导向部为导槽13，第二导向部为导轨12，导槽13和导轨12的数量分别包括两个，且呈180度正对设置。导槽13也可以于前套10a内壁呈周向设置有更多个，导槽13与驱动环9的轴线平行，以限定驱动环9沿导槽13做其轴向上的上下往复运动。
前套10a与驱动环9如此配接，使得当外套10与夹头本体6相对旋转时， 驱动环9与前套10a之间无相对转动地连接。
定位件7位于驱动环9与夹头本体6之间，驱动环9上靠近小开口的内侧壁上设置有内螺纹9a，夹头本体6上设置有外螺纹61，驱动环9套设于夹头本体6且与夹头本体6螺纹连接。当外套10相对夹头本体6旋转时，驱动环9随前套旋转的同时相对夹头本体6沿夹头轴线X方向移动。
定位件7包括与驱动环9倾斜抵推面9b抵接的配接部71，以及扶持部72，扶持部72可伸入第二导向孔6c向第一轴腔6a延伸。配接部71与扶持部72之间设置有复位偏压件，配接部71在复位偏压件的作用下向驱动环9的倾斜抵推面9b靠近，本实施例的复位偏压件设置成弹簧14，弹簧14套设于扶持部72上伸出第二导向孔6c的部位，弹簧14一端抵靠配接部71，另一端抵靠夹头本体6的侧壁上。
参照图3，当外套10沿第一方向相对夹头本体6旋转时，前套10a驱动驱动环9向靠近后套10b方向移动；驱动环9在移动过程中，驱动环9倾斜抵推面9b对定位件7形成抵推力，定位件7配接部71在抵推力的作用下，克服弹簧14的弹性力将扶持部72经第二导向孔6c送入第一轴腔6a，进入第一轴腔6a的扶持部72向第一轴腔6a的中心移动。优选地，上述倾斜抵推面9b与第二导向孔6c的轴线呈一定夹角，以确保抵推力可将定位件7推入第一轴腔6a内。在拆卸工作头时，定位件7能够受弹簧14的弹性回复力带动，随着倾斜抵推面的上移而沿第二导向孔6c向远离夹持口方向复位退回，以释放对工作头15的扶持。
参照图4，当外套10沿与第一方向相反的第二方向相对夹头本体6旋转时， 驱动环9随前套10a旋转的同时向远离后套10b的方向轴向移动。驱动环9在轴向移动的过程中，定位件7扶持部72在弹簧14复位作用力下从第一轴腔6a移出。
进一步参照图5、图6所示，如果将外套10相对夹头本体6沿第一方向的旋转，或者夹头本体6相对外套10沿与第一方向相反的第二方向的旋转，通过口径调节结构夹持口的口径进行收缩，通过定位件推动结构，定位件7的扶持部72同时由第二孔向孔6c向第一轴腔内6a的中心移动，从而能将插入第一轴腔6a中的工作头15推送到夹持口中心处供卡爪8夹持。同样地，如果将外套10相对夹头本体6沿与第一方向相反的第二方向的旋转或者将夹头本体6相对外套10沿第一方向的旋转，夹持口的口径由于卡爪8的后退进行了扩大，定位件7的扶持部72由于驱动环9的前移，以及在弹簧14的复位作用力下从夹持口的中心退出第一轴腔6a。
本发明的核心方案中，外套10和夹头本体6相对转动，能驱动口径调节结构及定位件推动结构同时运动。定位件推动结构的运动使得定位件7将插入第一轴腔6a中的工作头15推送至夹持口的中心，即对插入第一轴腔6a的工作头15进行扶正；口径调节结构的运动使得卡爪8所形成的夹持口收缩；定位件7对工作头15的扶正动作发生在卡爪8的夹持口缩小至将工作头15锁紧之前，从而卡爪8能将处于夹持口中心的工作头15进行可靠夹持。
本发明实施例提供了设置于夹头外套10内的工作头扶持装置，在卡爪8锁紧工作头15的过程中自动地扶正工作头15。避免了单纯依靠卡爪8夹持时可能出现的夹偏现象，降低了操作难度和改善了用户的体验。
参照图5所示，本发明的实施方式中的定位件7设置为弹性定位件7s，其扶持部72优选为弹性扶持部；优选地，在扶持部72伸入第一轴腔内的端部设置弹性垫72a，弹性垫72a优选为弹性橡胶垫。
参照图6所示，本实施例中弹性定位件7s的数目与卡爪8的数目一致，且与卡爪分别错开设置，三个卡爪8之间以及三个弹性扶持部72之间于周向分别呈120度。优选地，弹性扶持部72由第二导向孔6c伸入第一轴腔6a的末端部设置成弧面，三个弧面围成一个圆形的扶持口，扶持口与卡爪8围成的夹持口共圆心。需要说明的是，弹性定位件7s在夹持口锁紧前，先将工作头15扶持至夹持口的夹持中心，再在卡爪8锁紧工作头15的同时，通过弹性橡胶垫的挤压变形，继续对工作头15施以弹性扶持力。
需要说明的是，夹头本体6的后端还成型有适于安装驱动轴的第二轴腔62，该驱动轴可以为钻枪的驱动轴。驱动轴通过第二轴腔62与夹头本体6连接，并可在机械驱动下带动夹头本体6与驱动轴同步转动。当驱动轴联动夹头本体6或外套10正向转动时，卡爪7对工作头15实施锁紧，反向转动时，即完成对工作头15的释放。
另外，定位件推动结构可实现的结构有多种，在本实施例中定位件推动结构为推送驱动结构，推送驱动结构在外套10相对夹头本体6沿第一方向旋转或者夹头本体6相对外套10沿与第一方向相反的第二方向旋转的驱动下驱动定位件7将插入第一轴腔中6a的工作头15推送到夹持口的中心处；复位偏压件，其作用力作用在定位件7上，使定位件7具有远离夹持口的中心方向复位的趋势。定位件7朝夹持口的中心处的运动由推送驱动结构驱动，远离夹持口的中 心处的运动由复位偏压件来驱动，这样可以使得定位件推动结构更简单，更容易实现。
定位件7的可伸缩调节，使得定位件7对工作头15所形成的夹持力大小可调，能够适用于不同尺寸工作头15的扶正定位，适用性更强；又由于定位件7所形成的夹持口在未夹持工作头15时为打开状态，更有利于工作头15的自然插入，并且夹持结构稳定不易变形。
推送驱动结构包括套设在夹头本体6上的驱动环9，以及将夹头本体6的旋转运动转换为驱动驱动环9沿夹头本体6的轴向方向往返运动的第一传动结构，优选第一传动结构包括设置在驱动环9的内表面与夹头本体6的外表面之间的螺纹结构，以及设置在驱动环9与外套10的内壁之间，阻止驱动环9旋转的限位结构。
本实施方式提供的夹头的动作过程如下：如图2所示，当工作头15插入至第一轴腔内，通过机械轴联动夹头本体6与外套10发生相对转动，驱动驱动环9通过与夹头本体6螺纹配合、并受其与前套10a内壁之间的限位结构限位而进行夹头本体6轴向上的向下运动，从而对第二导向孔6c内的定位件7形成倾斜抵推力，以使定位件7推动工作头15向夹持口中心移动；同时夹头本体6与外套10的相对转动还驱动卡爪8通过与螺母5配合，沿第一导向孔6b向上移动，带动夹持口收缩；在工作头15受定位件7扶持至夹持口中心后，卡爪8继续对工作头15施以夹紧力对其完成锁紧固定，定位件7通过弹性垫72a的挤压变形进一步对工作头15施以弹性扶持力。
另外，后套10b的内壁上设有支撑夹头本体6的支撑圈2。后套10b与夹 头本体6之间还设有端面轴承4，端面轴承4的一侧紧贴螺母5设置，另一侧设置垫圈3限位。
第二实施方式
图7为本发明的第二实施方式中提供的夹头的剖视图；图8为图7所示的定位件的俯视图。本实施方式作为第一实施方式的一种替换方式，提供一种夹头，该夹头与第一实施方式的区别在于：
如图7所示，本实施方式中的定位件为磁性定位件7a，相比于第一实施方式的弹性定位件7s，磁性定位件7a数量只设置一个，并与其中一个卡爪8相对设置，这样卡爪8、磁性定位件7a可朝两个相对方向对工作头相抵，找正效果更为精确，磁性定位件7a包括扶持部74，以及设置在扶持部74的伸入第一轴腔内的端部上用于吸附工作头15的磁铁11，由于工作头15多为金属材料制成，通过在扶持部74上设置磁铁11，使得工作头15在插入第一轴腔内时受磁力作用自动吸附在定位件7a的扶持面上，再由定位件7a将工作头15推向卡爪8的夹持口中心，不仅提高了工作头15自动找正的精准性，还通过磁力吸附作用对工作头15起到了初步固定，防止工作头15掉落。当然对于工作头不是金属材料制成时，也可以通过在工作头上设置磁铁来解决。
当然，磁性定位件7a的数目不限于设置一个，也可以设置为三个，分别与卡爪8相对设置，可以有效防止工作头15插入相邻卡爪8之间的间隙中导致的夹偏，并且本实施方式中的驱动环9和夹头本体6之间的螺距与卡爪8和螺母5之间的螺距相同，使得夹头本体6转动时，驱动定位件7与卡爪8同步运动。
本实施方式提供的夹头的动作过程如下：当工作头15插入至第一轴腔6a 内，受磁力吸附至磁性定位件7a的磁力端，此时夹头本体6受驱动轴驱动与外套10发生相对转动，驱动卡爪8向夹持口中心收缩的同时，驱动驱动环9向下运动对磁性定位件7a形成朝向第一轴腔6a的抵推力，使得磁性定位件7a推动工作头15向夹持口的中心移动，在工作头15抵达夹持口中心的同时，夹持口收紧以形成卡爪8对工作头15的锁紧固定。
第三实施方式
图9为本发明的第三实施方式中提供的夹头的剖视图；图10为图9所示的定位件的俯视图。本实施方式作为第一实施方式的一种替换方式，提供一种夹头，该夹头与第一实施方式的区别在于：
本实施方式中的定位件与卡爪8相对设置，定位件的数目与卡爪8的数目一致，且定位件中包括磁性定位件7a和无磁性定位件7b，其中磁性定位件7a包括扶持部74，以及设置在扶持部74的伸入第一轴腔内的端部上用于吸附工作头15的磁铁11，无磁性定位件7b包括扶持部。
如图10所示，本实施方式中的卡爪8与定位件的数目优选地均设置为三个，其中，定位件的配置方式可以为一个磁性定位件7a与两个弹性定位件7s，其中弹性定位件7s包括扶持部72，以及设置在扶持部72的伸入第一轴腔内的端部上的弹性垫72a。通过磁性定位件7a与弹性定位件7s的配合设置，既为工作头15提供了磁力吸附，又提供了弹性预紧力，使得工作头15在自动找正的同时又可依靠磁力吸附于定位件7上，防止掉落。当然，本实施例的弹性定位件7s可以用无磁性定位件7b进行替换。
第四实施方式
图11至图14所示，为本发明的第四实施方式中提供的夹头30a。本实施例的夹头30a与第一实施例夹头30具有类似的工作原理，其中有相同的结构本实施以同一编号表示并不作赘述。
本实施方式中的外套10为整体式设置，夹头本体6收容于外套10内部，夹头本体6上活动地设置有卡爪8以及定位件7，定位件7的数目与卡爪8的数目一致，均设置有三个。外套10与夹头本体6之间设置有螺母5，螺母5的内螺纹与卡爪的外螺纹8a啮合。螺母5设置于支撑件51的内部，螺母5通过支撑件51与外套10无相对转动的连接。定位件7包括扶持部72以及第一配接部71a，具体地，第一配接部71a包括主体部以及由主体部向两侧延伸的凸块。
本实施例的定位件推动结构设置于外套10内侧并且靠近夹头本体6的后端，定位件推动结构包括与定位件7配接的驱动件92，以及与驱动件连接的第二传动机构。其中第二传动机构包括依次设置传动件94、弹性件96、以及支撑件98；其中驱动件92上设置有凸缘部，传动件96套设于驱动件92的凸缘部，传动件96通过卡簧97与驱动件92无相对转动地配接在一起。其中驱动件94设置有第二配接部，用于与定位件7的第一配接部71a配接，本实施例的第二配接部94a设置为卡槽，卡槽与位于第一配接部71a的两延伸凸块之间的主体部相卡接。支撑件98与相对外套10固定设置，弹性件96设置于传动件94与支撑件98之间。弹性件96一端抵接支撑件98，另一端通过垫片95与传动件94抵接。传动件94朝向支撑件98的端面上设置有第一抵接部94a,支撑件98朝向传动件94的端面上设置有第二抵接部98a。
参照图12，夹头30a处于非工作状态，工作头已从夹持口取走，卡爪8伸 入第一轴腔6的夹持端相互靠近；定位件7伸入第一轴腔6a并向夹持口的中心移动相互靠近。此时弹性件96处于伸展状态。
进一步参照图13、图14所示，当要将工作头插入夹头30a夹持口并对工作头进行紧锁时，沿第一方向相对夹头本体6旋转外套10，外套10带动螺母5一起旋转，从而驱动卡爪8相对夹头本体6向外套10的后端滑动，夹持口逐渐打开。随着卡爪8的进一步滑动，卡爪8的后端开始与驱动件92抵接，并随着卡爪8的滑动推动驱动件92及支撑件94一起克服弹性件96的作用力向夹头本体6的后端移动，使得弹性件96被压缩，定位件7的扶持部72受驱动件92的作用逐渐从第一轴腔6a中移出。此时工作头(图中未示出)可以从第一轴腔6a插入由卡爪8形成的夹持口，以及由定位件7形成的扶持口。
参照图14所示，需要指出的是，当卡爪8向夹头本体8后端移动至其极限位置，传动件94的第一抵接部94a与支撑件98的第二抵接部98a相互干涉，从而阻止了外套10相对夹头本体6的过旋，避免外套10与夹头本体6两者锁死的情况。
相反地，如果沿与第一方向相反的第二方向旋转外套10，在旋转的过程中，卡爪8逐渐向夹头本体6移动，传动件94在弹性件96的弹性回复力作用下，由夹头本体6的后端向其前端移动，从而使得驱动件92驱动定位件7扶持部72由第二孔向孔6c向第一轴腔内6a的中心移动，从而能将插入第一轴腔6a中的工作头推送到夹持口中心处供卡爪8夹持。定位件推动结构的运动使得定位件7将插入第一轴腔6a中的工作头推送至夹持口的中心进行扶正；口径调节结构的运动使得卡爪8所形成的夹持口收缩从而卡爪8能将处于夹持口中心的 工作头15进行可靠夹持。
在实际操作中，通过机械轴联动夹头本体6与外套10发生相对转动以使定位件7的扶持部72推动工作头向夹持口中心移动；同时卡爪8受夹头本体6和外套10的相对转动驱动，锁紧夹持口，在扶持部74将工作头扶持至夹持口中心的同时，夹持口锁紧，形成对工作头的固定；当驱动轴联动夹头本体6或外套10反向转动时，即完成对工作头15的释放。

Claims (29)

  1. 一种夹头，包括
    外套(10)；
    夹头本体(6)，设置于所述外套内且可与所述外套相对旋转,所述夹头本体于延伸方向上定义一纵轴线；
    若干卡爪(8)，围绕所述纵轴线分布于所述夹头本体上且相对夹头本体活动设置；
    口径调节结构，设置于所述外套和卡爪之间，用于调节所述卡爪与夹头本体的相对位移；
    其特征在于，
    所述夹头还包括至少一个定位件(7)和定位件推动结构；所述定位件设置于所述夹头本体上相邻的夹爪之间，所述外套与夹头本体相对旋转，当所述口径调节结构驱动所述卡爪相对所述纵轴线相互靠拢时，所述定位件推动结构推动所述定位件向靠近所述纵轴线方向移动；当所述口径调节结构驱动所述卡爪相对所述纵轴线相互远离时，所述定位件推动结构推动所述定位件远离所述纵轴线方向移动。
  2. 根据权利要求1所述的夹头，其特征在于，所述夹头本体(6)上成型有适于安装工作头(15)的第一轴腔，所述夹头本体的侧壁上成型有若干与所述第一轴腔相通且围绕第一轴腔呈环状分布的第一导向孔，所述卡爪分别通过所述第一导向孔伸入所述第一轴腔；所述夹头本体的侧壁上还设有与所述第一轴腔相通的第二导向孔，所述定位件通过所述第二导向孔伸入所述第一轴腔。
  3. 根据权利要求2所述的夹头，其特征在于，所述第一轴腔的中心线与所述纵轴线共线，所述第一导向孔与第二导向孔于纵轴线上的投影相间隔。
  4. 根据权利要求3所述的夹头，其特征在于，所述外套相对夹头本体沿第一方向旋转，所述定位件由第二导向孔伸入所述第一轴腔并向靠拢所述纵轴线方向移动至将插入所述第一轴腔中的工作头扶正；所述卡爪分别由第一导向孔伸入所述第一轴腔并相对所述纵轴线相互靠拢，从而将所述工作头进行夹紧。
  5. 根据权利要求4所述的夹头，其特征在于，所述定位件在所述卡爪夹紧所述工作头之前扶正所述工作头。
  6. 根据权利要求3所述的夹头，其特征在于，所述外套相对夹头本体沿第二方向旋转，所述定位件向远离所述纵轴线方向移动，所述卡爪相对所述纵轴线相互远离，从而释放所述工作头。
  7. 根据权利要求2所述的夹头，其特征在于，所述定位件推动结构包括套设在所述夹头本体(6)上的第一驱动件(9)，以及将所述第一驱动件相对夹头本体(6)的旋转运动转换为第一驱动件沿所述夹头本体(6)的轴向方向往返运动的第一传动结构。
  8. 根据权利要求7所述的夹头，其特征在于，所述第一传动结构包括设置在第一驱动件(9)的内表面与所述夹头本体(6)的外表面之间的螺纹结构。
  9. 根据权利要求7所述的夹头，其特征在于，所述夹头还包括设置于第一驱动件(9)与外套(10)之间设置的限位结构，用于阻止所述第一驱动件相对所述外套旋转。
  10. 根据权利要求9所述的夹头，其特征在于，所述限位结构包括设置于 所述第一驱动件(9)并沿所述第一驱动件(9)轴向方向延伸的第一导向部，以及设置于所述外套的内壁上的与所述第一导向部配合导向的第二导向部，所述第一导向部与第二导向部其中之一设置成导轨(12)，第一导向部与第二导向部其中之另一个可以设置成与导轨啮合的导槽(13)。
  11. 根据权利要求7所述的夹头，其特征在于，所述定位件推动结构还包括第一偏压件(14)，所述第一偏压件作用在所述定位件(7)上，使所述定位件(7)具有远离所述纵轴线的趋势。
  12. 根据权利要求11所述的夹头，其特征在于，所述第一驱动件(9)具有一倾斜抵推面，所述定位件(7)包括与所述倾斜抵推面相抵的配接部(71)以及用于伸入第一轴腔的扶持部(72)。
  13. 根据权利要求12所述的夹头，其特征在于，所述偏压件为套设在所述扶持部(72)上的弹簧，所述弹簧一端抵住所述夹头本体(6)，另一端抵住所述配接部的台阶面。
  14. 根据权利要求2所述的夹头，其特征在于，所述定位件推动结构包括与定位件(7)配接的第二驱动件(92)，以及与第二驱动件配接的第二传动机构，所述卡爪可选择与第二驱动件抵接并推动第二驱动件移动或者与第二驱动件分离，当卡爪与所述第二驱动件抵接并推动第二驱动件移动时，所述定位件(7)向远离纵轴线移动。
  15. 根据权利要求14所述的夹头，其特征在于，所述定位件推动结构还包括第二偏压件(96)，当所述卡爪与第二驱动件分离时，所述第二偏压件提供定位件向靠近纵轴线方向移动的回复力。
  16. 根据权利要求15所述的夹头，其特征在于，所述第二传动机构包括与第二驱动件配接的传动件(94)、相对夹头本体(6)固定设置的支撑件(98)，所述第二偏压件设置于传动件与支撑件之间。
  17. 根据权利要求16所述的夹头，其特征在于，所述第二偏压件设置为弹簧，所述传动件设置有第一抵接部(94a),所述支撑件(98)上设置有用于与第一抵接部配合止挡的第二抵接部(98a)。
  18. 根据权利要求1所述的夹头，其特征在于，所述定位件(7)设置成弹性定位件(7s)，所述弹性定件数量包括若干个。
  19. 根据权利要求18所述的夹头，其特征在于，所述弹性定位件(7s)包括扶持部(72)，以及设置在所述扶持部上远离所述定位件推动结构端部的弹性垫(72a),所述弹性垫能够为工作头(15)提供弹性扶持力。
  20. 根据权利要求1所述的夹头，其特征在于，所述定位件(7)设置成磁性定位件(7a)。
  21. 根据权利要求20所述的夹头，其特征在于，所述磁性定位件(71)包括扶持部(74)，以及设置在在所述扶持部上远离所述定位件推动结构端部的磁铁(11)，所述磁铁通过吸附工作头(15)对工作头进行扶正。
  22. 根据权利要求20所述的夹头，其特征在于，所述磁性定位件(71)对工作头进行扶正的同时卡爪相互靠拢锁紧工作头。
  23. 根据权利要求1所述的夹头，其特征在于，所述定位件(7)的数量包括若干，所述定位件与所述卡爪(8)的数量设置一致。
  24. 根据权利要求23所述的夹头，其特征在于，所述定位件(7)与所述 卡爪(8)分别错位设置。
  25. 根据权利要求1所述的夹头，其特征在于，所述口径调节结构包括成型在所述卡爪(8)的外壁上的外螺纹，以及设置于所述外套内的螺母(5)，所述外螺纹与所述螺母(5)啮合。
  26. 根据权利要求1所述的夹头，其特征在于，所述卡爪(8)倾斜设置在所述夹头本体(6)上，所述螺母(5)的内螺纹面为与所述卡爪(8)的倾斜度相适应的圆锥面。
  27. 根据权利要求1所述的夹头，其特征在于，所述外套(10)包括相互配接的前套(10a)和后套(10b)，所述螺母(5)设于所述后套与所述夹头本体(6)之间。
  28. 根据权利要求27所述的夹头，其特征在于，所述后套(10b)的内壁上设有支撑所述夹头本体(6)的支撑圈(2)。
  29. 根据权利要求27所述的夹头，其特征在于，所述后套(10b)与所述夹头本体(6)之间还设有端面轴承(4)，所述端面轴承(4)的一侧紧贴所述螺母(5)设置，另一侧设置垫圈(3)限位。
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CN112262008A (zh) * 2018-06-07 2021-01-22 捷可勃斯夹头制造（苏州）有限公司 自校准夹头
US11203070B2 (en) * 2018-06-07 2021-12-21 Apex Brands, Inc. Self-aligning chuck

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EP3409403A1 (en) 2018-12-05
EP3409403A4 (en) 2019-09-11
US10632544B2 (en) 2020-04-28
JP2019508269A (ja) 2019-03-28
EP3409403B1 (en) 2022-11-30
CN107020396A (zh) 2017-08-08
AU2016388991A1 (en) 2018-08-16
JP6615372B2 (ja) 2019-12-04
CN107020396B (zh) 2021-06-11
US20180369928A1 (en) 2018-12-27
CA3012879A1 (en) 2017-08-03

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