CN115301970A

CN115301970A - Compensation type chuck

Info

Publication number: CN115301970A
Application number: CN202211053090.1A
Authority: CN
Inventors: 金灿灿; 罗国章; 黄伟
Original assignee: Zhejiang Jingsu Machine Tool Accessories Co ltd
Current assignee: Zhejiang Jingsu Machine Tool Accessories Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-11-08
Anticipated expiration: 2042-08-31
Also published as: CN115301970B

Abstract

The application relates to a compensation type chuck, which comprises a disc seat, a reset piece, a plurality of supporting blocks, a plurality of balls and a plurality of clamping jaws, wherein the balls are hinged in the disc seat in a spherical manner, the supporting blocks penetrate through and are fixedly connected to the corresponding balls, and a movable rod is coaxially and slidably connected in the disc seat; swing joint has the movable block on the supporting shoe, coaxial cover is established and is rotated on the movable rod and be connected with the lantern ring, and lantern ring outer wall is equipped with a plurality of fixed blocks, has seted up first inclined plane on the fixed block, and the movable block is the butt face towards one side on first inclined plane, and the piece that resets is used for driving the supporting shoe and rotates to the butt face and laminate all the time on first inclined plane. When axle type work piece surface is irregular, because leave the clearance between the lantern ring and the movable rod, the lantern ring can remove for the movable rod, changes the jack catch through the position that changes the jack catch to the tight position of supporting of axle type work piece, and it is tight to compensate the work piece to carry out the clamp to improve the centre gripping fastness of chuck jack catch to the work piece.

Description

Compensation type chuck

Technical Field

The present application relates to the field of chucks and, more particularly, to a compensating chuck.

Background

Chucks are mechanical devices used to clamp workpieces on machine tools. The machine tool accessory clamps and positions a workpiece by utilizing the radial movement of movable clamping jaws uniformly distributed on a chuck body.

A chuck in the related art is shown in fig. 1, and includes a disc seat 1 and three jaws 14, a movable block 3 is disposed on each jaw 14, each jaw 14 is slidably connected to the disc seat 1 along a radial direction of the disc seat 1 through the movable block 3, a movable rod 11 is slidably connected to a center of the disc seat 1 along an axis direction parallel to the disc seat 1, the movable rod 11 can be driven by an external oil cylinder, three first inclined planes 31 are sequentially disposed on an outer wall of the movable rod 11 along a circumferential direction, the three movable blocks 3 respectively correspond to the three first inclined planes 31, a second inclined plane 32 which is the same as and matched with an inclined direction of the first inclined plane 31 is disposed on one side surface of each of the three movable blocks 3 facing the corresponding first inclined planes 31, the movable rod 11 is slidably connected to the movable block 3 along an inclined direction of the second inclined plane 32, and the first inclined plane 31 is always attached to the second inclined plane 32.

An operator fixedly connects a piston rod of an external oil cylinder to the movable rod, the movable rod is driven by the oil cylinder to slide along the axis direction parallel to the disc seat, the movable block is driven by the matching of the first inclined plane and the second inclined plane to slide on the disc seat, and when shaft workpieces are machined, clamping jaws on the chuck radially slide towards the center of the chuck so as to clamp the shaft workpieces tightly.

The above-mentioned related technical solutions have the following drawbacks: when the axle type work piece surface of by the centre gripping is irregular, the jack catch of above-mentioned chuck can't laminate the surface of axle type work piece completely, and the contact along with the rotation of chuck and processing cutter can make axle type work piece appear not hard up, influences the machining precision.

Disclosure of Invention

In order to improve the centre gripping fastness of chuck jack catch to the work piece, this application provides a compensation type chuck.

The application provides a compensation type chuck adopts following technical scheme:

a compensation type chuck comprises a disc seat and a plurality of clamping jaws, and further comprises a resetting part, a plurality of supporting blocks and a plurality of spheres, wherein the spheres are sequentially distributed in the disc seat along the axis direction of the disc seat and are spherically hinged in the disc seat, the supporting blocks correspond to the spheres respectively, the supporting blocks penetrate through and are fixedly connected to the corresponding spheres, the clamping jaws correspond to the supporting blocks respectively, one ends of the supporting blocks extend out of the disc seat, the clamping jaws are detachably connected to the ends, extending out of the disc seat, of the corresponding supporting blocks, and movable rods are coaxially and slidably connected in the disc seat;

the supporting block is movably connected with a movable block, the movable rod is coaxially sleeved with a lantern ring in a sleeved and rotating mode, a plurality of fixed blocks are sequentially arranged on the outer wall of the lantern ring along the circumferential direction of the lantern ring, the fixed blocks correspond to the movable blocks respectively, a first inclined plane is arranged on one side face, away from the lantern ring, of each fixed block, the distance between the first inclined plane and the axis of the lantern ring along the axis direction of the lantern ring is linearly changed, the side face, facing the first inclined plane, of each movable block is an abutting face, and the reset piece is used for driving the supporting block to rotate until the abutting face is always attached to the first inclined plane;

a gap is reserved between the lantern ring and the movable rod, and the lantern ring can be connected to the movable rod in a sliding mode in the direction perpendicular to the axis of the disc seat.

By adopting the technical scheme, an operator can fixedly connect a piston rod of the external oil cylinder to the movable rod, the positions of the lantern ring and the fixed block are changed by driving the movable rod to move, along with the movement of the fixed block, the movable block abutted against the first inclined plane of the fixed block can drive the supporting block to rotate by taking the sphere as a fulcrum along with the movement of the fixed block, at the moment, the positions of the clamping jaws on the supporting block can also be changed, and the plurality of clamping jaws move towards one side of the axis of the disc seat to clamp the shaft workpiece; when axle type work piece surface is irregular, because leave the clearance between the lantern ring and the movable rod, the lantern ring can remove for the movable rod, changes the jack catch through the position that changes the jack catch to the tight position of supporting of axle type work piece, and it is tight to compensate the work piece to carry out the clamp to improve the centre gripping fastness of chuck jack catch to the work piece.

Preferably, the ball is located between the jaw and the movable block.

Through adopting above-mentioned technical scheme, because the spheroid is the rotation fulcrum, set up jack catch and movable block respectively in spheroidal both sides, rather than set up jack catch and movable block in spheroidal one side, when the one end that promotes the movable block and drive the supporting shoe rotates, according to lever principle, the jack catch that can more laborsaving drive the other end rotates, under the effect of the same power, makes the jack catch reach better centre gripping effect.

Preferably, the movable block is the cylinder setting, the cross-section of movable block is bow-shaped setting, the cylindrical groove has been seted up on the supporting shoe is close to one side outer wall of the lantern ring, the movable block uses the axial lead of movable block to rotate as the axis of rotation and connects in the cylindrical groove, the rotation axis direction of the rotation axis direction perpendicular to lantern ring of movable block, the arcwall face of movable block is laminated on the cylindrical groove inner wall all the time.

Through adopting above-mentioned technical scheme, on the butt face of fixed block butt and drive supporting shoe pivoted in-process, the arcwall face of movable block laminates all the time and rotates on cylindrical groove inner wall, can improve movable block and supporting shoe pivoted stability.

Preferably, the outer wall of one side of the supporting block, which is close to the lantern ring, is provided with an avoiding groove communicated with the cylindrical groove, and the avoiding groove is used for allowing the lantern ring and the fixing block to move inside.

Through adopting above-mentioned technical scheme, dodge the groove through setting up, lantern ring and fixed block can get into and dodge the inslot activity, and the distance between supporting shoe and the movable rod can be dwindled, makes the structure in the disc seat compacter.

Preferably, the piece that resets includes a plurality of springs and a plurality of butt joint piece, butt joint piece is along the slip direction sliding connection of perpendicular to movable rod in the disc seat, and a plurality of springs correspond a plurality of butt joint pieces respectively, and a plurality of butt joint pieces correspond a plurality of supporting shoes respectively, butt joint piece is located the one side that the movable rod was kept away from to the corresponding supporting shoe, the spring setting is on corresponding butt joint piece and drive butt joint piece butt all the time on corresponding the supporting shoe.

Through adopting above-mentioned technical scheme, the butt piece is on the supporting shoe and drive supporting shoe and move towards lantern ring one side under the effect of spring for the butt face of movable block can laminate on the first inclined plane that corresponds the fixed block always.

Preferably, the piece that resets still includes a plurality of locking bolts, and a plurality of locking bolts correspond a plurality of butt pieces respectively, a plurality of mounting holes have been seted up in proper order along the circumference direction on the disc seat outer wall, and a plurality of locking bolts correspond a plurality of mounting holes respectively, locking bolt threaded connection corresponds on the mounting hole, the spout has been seted up to locking bolt near the one end of disc seat center pin, the butt piece is along the slip direction sliding connection of perpendicular to movable rod in the spout, the spring is located the spout, the both ends of spring butt respectively on the butt piece and on the spout diapire, the spring is compression state all the time.

Through adopting above-mentioned technical scheme, the whole piece that resets is equivalent to can dismantle the connection on the disc seat, can make things convenient for operating personnel to change the piece that resets, perhaps maintains the spare part on the piece that resets.

Preferably, one end, close to the supporting block, of the abutting block is provided with an arc surface, and the center of the arc surface protrudes towards one side of the supporting block.

Through adopting above-mentioned technical scheme, because the supporting shoe is the rotary motion with the spheroid as the fulcrum, so the butt that the arc surface of butt piece tip can be better is on the supporting shoe, and the supporting shoe can reduce the friction between butt piece and the supporting shoe at the rotation in-process, plays the guard action to butt piece and supporting shoe.

Preferably, a strip-shaped groove is formed in the side face, facing the supporting block, of one side, and the end, close to the supporting block, of the abutting block abuts against the bottom wall of the strip-shaped groove and is movably connected to the strip-shaped groove.

Through adopting above-mentioned technical scheme, the bar groove is used for playing limiting displacement to the butt joint piece, because the area of contact between the arc surface of butt joint piece and the supporting shoe is little so take place to skid easily, through seting up the problem that takes place to skid between avoiding butt joint piece and the supporting shoe that the bar groove can be fine.

Preferably, the side surface of one side, facing the clamping jaws, of the disc seat is coaxially provided with a tip, and the tip is used for abutting against a positioning shaft type workpiece.

By adopting the technical scheme, the center can play a role in positioning the shaft workpiece.

In summary, the present application includes at least one of the following beneficial technical effects:

by arranging the gap between the sleeve ring and the movable rod, when the outer surface of the shaft workpiece is irregular, the sleeve ring can move relative to the movable rod, the abutting position of the clamping jaw on the shaft workpiece is changed by changing the position of the clamping jaw, and the workpiece is compensated and clamped, so that the clamping firmness of the chuck clamping jaw on the workpiece is improved;

keep away the groove through the setting, lantern ring and fixed block can get into and keep away the inslot activity, and the distance between supporting shoe and the movable rod can be dwindled, makes the inside structure of disc seat compacter.

Drawings

Fig. 1 is an overall structural diagram of the related art.

Fig. 2 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 3 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2.

Fig. 4 is a schematic view of the collar and anchor block configuration.

Fig. 5 is an enlarged view at B in fig. 3.

Description of reference numerals: 1. a disc base; 11. a movable rod; 12. a support block; 121. a cylindrical groove; 122. a strip-shaped groove; 123. an avoidance groove; 13. a sphere; 14. a claw; 141. a first bolt; 15. a collar; 151. a fixed block; 152. a gap; 153. a first inclined surface; 16. a movable block; 161. an abutting surface; 162. an arc-shaped surface; 17. a tip; 171. a second bolt; 18. a tooth surface; 19. mounting holes; 2. a reset member; 21. a spring; 22. a butting block; 221. accommodating grooves; 222. a circular arc surface; 23. a locking bolt; 231. a chute; 3. a moving block; 31. a first inclined plane; 32. a second inclined plane.

Detailed Description

The present application is described in further detail below with reference to figures 2-5.

The embodiment of the application discloses a compensation type chuck.

Referring to fig. 2 and 3, the compensating chuck of the present embodiment includes a disk holder 1, a restoring member 2, three supporting blocks 12, three balls 13, and three jaws 14. The disc seat 1 is arranged in a cylinder, a movable rod 11 is coaxially connected in the disc seat 1 in a sliding manner, the movable rod 11 is coaxially connected in the disc seat 1 in a rotating manner, one end of the movable rod 11 is located in the disc seat 1, and the other end of the movable rod 11 extends out of the disc seat 1. The three spheres 13 are uniformly distributed in the disc seat 1 along the axial direction of the disc seat 1 and are hinged in the disc seat 1, and the movable rod 11 is enclosed by the three spheres 13. The three supporting blocks 12 correspond to the three spheres 13 respectively, and the supporting blocks 12 penetrate through and are fixedly connected to the corresponding spheres 13. The two ends of the supporting block 12 are respectively located at the two sides of the ball 13. The three claws 14 respectively correspond to the three supporting blocks 12, one ends of the supporting blocks 12 extend out of the disc seat 1, and the claws 14 are detachably connected to the ends of the corresponding supporting blocks 12 extending out of the disc seat 1.

Referring to fig. 2 and 3, the claws 14 and the end of the movable rod 11 extending out of the disc base 1 are respectively located at two sides of the disc base 1. The ball 13 is located at one end of the disc holder 1 near the claws 14.

Referring to fig. 2 and 3, when the supporting block 12 rotates to be vertically arranged, the claw 14 is connected to one end of the supporting block 12 extending out of the disc base 1 in a sliding manner along a horizontal direction, and the sliding direction of the claw 14 slides back and forth from one side close to the axial lead of the disc base 1 to one side far away from the axial lead of the disc base 1. The side surfaces of the claws 14, which are opposite to the supporting block 12, are provided with tooth surfaces 18, and the two tooth surfaces 18 are meshed with each other. The jaw 14 is connected with a plurality of first bolts 141, and one end of each first bolt 141 passes through the jaw 14 and is screwed on the support block 12.

Referring to fig. 3 and 4, a movable block 16 is movably connected to the supporting block 12, and the movable block 16 is located on one side of the ball 13 far away from the claw 14. The movable rod 11 is coaxially sleeved and rotatably connected with a lantern ring 15, a gap 152 is reserved between the lantern ring 15 and the movable rod 11, and the lantern ring 15 can be slidably connected to the movable rod 11 along the axial direction perpendicular to the disc seat 1. The outer wall of the lantern ring 15 is uniformly fixed with three fixed blocks 151 along the circumferential direction of the lantern ring 15, the three fixed blocks 151 correspond to the three movable blocks 16 respectively, a first inclined plane 153 is arranged on the side face of one side of the fixed block 151 far away from the lantern ring 15, and the distance from one end of the first inclined plane 153 close to the clamping jaw 14 to one end far away from the clamping jaw 14 to the axial lead of the lantern ring 15 gradually decreases.

Referring to fig. 3 and 4, the movable block 16 is a cylinder, the cross section of the movable block 16 is an arc-shaped configuration, the side of the movable block 16 with a radian is an arc-shaped surface 162, the side of the movable block 16 away from the arc-shaped surface 162 is an abutting surface 161, a cylindrical groove 121 matched with the movable block 16 is formed in the outer wall of one side of the support block 12 close to the lantern ring 15, the movable block 16 is rotatably connected in the cylindrical groove 121 by taking the axial lead of the movable block 16 as a rotating shaft, and the rotating axis of the movable block 16 is parallel to the plane corresponding to the first inclined surface 153. An avoiding groove 123 communicated with the cylindrical groove 121 is formed in the outer wall of one side, close to the lantern ring 15, of the supporting block 12, the avoiding groove 123 is located on one side, close to the clamping jaw 14, of the cylindrical groove 121, and the avoiding groove 123 is used for enabling the lantern ring 15 and the fixing block 151 to move in the inner direction. The reset element 2 is used for driving the supporting block 12 to rotate until the abutting surface 161 of the movable block 16 is always attached to the corresponding first inclined surface 153, and the arc surface 162 of the movable block 16 is always attached to the inner wall of the cylindrical groove 121.

Referring to fig. 3 and 4, an operator can fixedly connect a piston rod of an external oil cylinder to the movable rod 11, and change the positions of the lantern ring 15 and the fixed block 151 by driving the movable rod 11 to move, along with the movement of the fixed block 151, the movable block 16 abutting against the first inclined surface 153 drives the supporting block 12 to rotate around the sphere 13 as a fulcrum along with the movement of the fixed block 151, at this time, the positions of the jaws 14 on the supporting block 12 also change, and the jaws 14 move towards one side of the axis of the disc seat 1 to clamp the shaft-like workpiece; when axle type work piece surface is irregular, because leave clearance 152 between lantern ring 15 and the movable rod 11, lantern ring 15 can remove for movable rod 11, changes the jack catch 14 tight position of supporting of axle type work piece through the position that changes jack catch 14, and it is tight to compensate the work piece to carry out the clamp to improve the centre gripping fastness of chuck jack catch 14 to the work piece.

Referring to fig. 2 and 3, when the fixed block 151 abuts against the abutting surface 161 of the movable block 16 and drives the support block 12 to rotate, the arc surface 162 of the movable block 16 always abuts against the inner wall of the cylindrical groove 121 to rotate, so that the stability of rotation of the movable block 16 and the support block 12 can be improved. Meanwhile, by arranging the avoiding groove 123, the lantern ring 15 and the fixing block 151 can enter the avoiding groove 123 to move, and the distance between the supporting block 12 and the movable rod 11 can be shortened, so that the structure inside the disc seat 1 is more compact.

Referring to fig. 3 and 5, the reset member 2 includes three springs 21, three abutting blocks 22 and three locking bolts 23, three mounting holes 19 are uniformly formed in the outer wall of the disc seat 1 along the circumferential direction, the three mounting holes 19 correspond to the three locking bolts 23 respectively, the locking bolts 23 are in threaded connection with the corresponding mounting holes 19, and the axes of the locking bolts 23 are perpendicular to the central axis of the disc seat 1 and intersect with the central axis of the disc seat 1 at one point. The locking bolt 23 has a sliding groove 231 coaxially formed at an end surface facing the central axis of the disc holder 1. The three abutment blocks 22 correspond to the three locking bolts 23, respectively, and the abutment blocks 22 are slidably coupled in the slide grooves 231 in a direction parallel to the axial direction of the locking bolts 23. Holding tank 221 has been seted up to one side that butt piece 22 is close to spout 231 diapire, three spring 21 corresponds three butt piece 22 respectively, spring 21 is located and corresponds spout 231 and holding tank 221, the both ends of spring 21 butt respectively on holding tank 221 diapire and spout 231 diapire, spring 21 is the compression state all the time, three butt piece 22 corresponds three bracing piece respectively, butt piece 22 is located and corresponds one side that movable rod 11 was kept away from to the bracing piece, spring 21 drive butt piece 22 is all the time the butt on corresponding the bracing piece.

Referring to fig. 3 and 5, an arc surface 222 is formed at one end of the abutting block 22 close to the supporting rod, and the center of the arc surface 222 protrudes toward one side of the supporting rod. Supporting shoe 12 has seted up bar groove 122 on the side of one side of butt piece 22, and the length direction in bar groove 122 is on a parallel with the length direction of supporting rod, and butt piece 22 is close to the tip butt of bracing piece and swing joint is on bar groove 122 diapire and on bar groove 122.

Referring to fig. 3 and 5, the whole reset piece 2 is equivalent to be detachably connected to the disc base 1, so that the reset piece 2 can be conveniently replaced by an operator, or parts on the reset piece 2 can be maintained. Meanwhile, as the supporting block 12 rotates around the sphere 13, the arc surface 222 at the end of the abutting block 22 can abut against the supporting block 12 better, and the friction between the abutting block 22 and the supporting block 12 can be reduced during the rotation of the supporting block 12, so as to protect the abutting block 22 and the supporting block 12. The strip-shaped groove 122 is used for limiting the abutting block 22, and the contact area between the arc surface 222 of the abutting block 22 and the supporting block 12 is small, so that slipping can easily occur, and the problem of slipping between the abutting block 22 and the supporting block 12 can be well avoided by arranging the strip-shaped groove 122.

Referring to fig. 2 and 3, the center 17 is detachably connected to the side surface of the disc base 1 facing the jaws 14, and the center 17 gradually shrinks from the end close to the disc base 1 to the end far away from the disc base 1. The centre 17 is located between the three jaws 14, and the centre 17 is arranged coaxially with the disc holder 1. The center 17 is used for abutting against the end face center of the shaft workpiece, and plays a role in positioning the shaft workpiece.

The implementation principle of a compensation type chuck of the embodiment of the application is as follows: an operator can fixedly connect a piston rod of the external oil cylinder to the movable rod 11, the positions of the lantern ring 15 and the fixed block 151 are changed by driving the movable rod 11 to move, along with the movement of the fixed block 151, the movable block 16 abutted against the first inclined surface 153 can drive the supporting block 12 to rotate by taking the sphere 13 as a fulcrum along with the movement of the fixed block 151, at the moment, the positions of the clamping claws 14 on the supporting block 12 can also be changed, and the plurality of clamping claws 14 move towards one side of the axis of the disc seat 1 to clamp the shaft-type workpiece; when axle type work piece surface is irregular, because leave clearance 152 between lantern ring 15 and the movable rod 11, lantern ring 15 can remove for movable rod 11, changes the jack catch 14 tight position of supporting of axle type work piece through the position that changes jack catch 14, and it is tight to compensate the work piece to carry out the clamp to improve the centre gripping fastness of chuck jack catch 14 to the work piece.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A compensation type chuck, includes disc seat (1) and a plurality of jack catch (14), its characterized in that: the disc type brake device is characterized by further comprising a reset piece (2), a plurality of supporting blocks (12) and a plurality of balls (13), wherein the balls (13) are sequentially distributed in the disc seat (1) along the axis direction of the disc seat (1) and are hinged in the disc seat (1), the supporting blocks (12) correspond to the balls (13) respectively, the supporting blocks (12) penetrate through and are fixedly connected to the corresponding balls (13), a plurality of clamping jaws (14) correspond to the supporting blocks (12) respectively, one ends of the supporting blocks (12) extend out of the disc seat (1), the clamping jaws (14) are detachably connected to the end portions, extending out of the disc seat (1), of the corresponding supporting blocks (12), and movable rods (11) are coaxially connected in the disc seat (1) in a sliding mode;

the supporting block (12) is movably connected with a movable block (16), the movable rod (11) is coaxially sleeved with a lantern ring (15) in a rotating mode, the outer wall of the lantern ring (15) is sequentially provided with a plurality of fixing blocks (151) along the circumferential direction of the lantern ring (15), the fixing blocks (151) correspond to the movable blocks (16), a first inclined surface (153) is arranged on one side face, away from the lantern ring (15), of the fixing blocks (151), the distance between the first inclined surface (153) and the axis of the lantern ring (15) changes linearly along the axis direction of the lantern ring (15), one side face, facing the first inclined surface (153), of the movable block (16) is an abutting surface (161), and the reset piece (2) is used for driving the supporting block (12) to rotate until the abutting surface (161) is always abutted to the first inclined surface (153);

a gap (152) is reserved between the lantern ring (15) and the movable rod (11), and the lantern ring (15) can be connected to the movable rod (11) in a sliding mode along the axial direction perpendicular to the disc seat (1).

2. The compensating chuck as claimed in claim 1, wherein: the sphere (13) is positioned between the clamping jaw (14) and the movable block (16).

3. A compensating chuck as claimed in claim 1, wherein: the utility model discloses a supporting shoe, including supporting shoe (12), movable block (16), the axis of movable block (16) is the axis of rotation and is connected in column groove (121), the axis of rotation direction perpendicular to the rotation axis direction of the lantern ring (15) of movable block (16), arcwall face (162) of movable block (16) are laminated on column groove (121) inner wall all the time, the movable block (16) is the cylinder setting, the cross-section of movable block (16) is bow-shaped setting, column groove (121) has been seted up on the supporting shoe (12) is close to the one side outer wall of the lantern ring (15), movable block (16) use the axis of movable block (16) to rotate the connection in column groove (121).

4. A compensating chuck as claimed in claim 3, wherein: the supporting shoe (12) are close to and offer on the one side outer wall of lantern ring (15) dodge groove (123) with cylindrical groove (121) intercommunication, dodge groove (123) and be used for supplying including the lantern ring (15) and fixed block (151) activity.

5. The compensating chuck as claimed in claim 1, wherein: reset piece (2) and include a plurality of springs (21) and a plurality of butt piece (22), butt piece (22) are along the slip direction sliding connection of perpendicular to movable rod (11) in disc seat (1), and a plurality of springs (21) correspond a plurality of butt pieces (22) respectively, and a plurality of butt pieces (22) correspond a plurality of supporting shoes (12) respectively, butt piece (22) are located one side of keeping away from movable rod (11) corresponding supporting shoe (12), spring (21) set up on corresponding butt piece (22) and drive butt piece (22) butt all the time on corresponding supporting shoe (12).

6. The compensating chuck as claimed in claim 5, wherein: reset piece (2) and still include a plurality of locking bolt (23), a plurality of locking bolt (23) correspond a plurality of butt piece (22) respectively, a plurality of mounting holes (19) have been seted up in proper order along the circumferential direction on disc seat (1) outer wall, a plurality of locking bolt (23) correspond a plurality of mounting holes (19) respectively, locking bolt (23) threaded connection is on corresponding mounting hole (19), spout (231) have been seted up to locking bolt (23) near the one end of disc seat (1) center pin, butt piece (22) are along the slip direction sliding connection of perpendicular to movable rod (11) in spout (231), spring (21) are located spout (231), the both ends of spring (21) butt respectively on butt piece (22) and spout (231) diapire, spring (21) are compression state all the time.

7. The compensating chuck as claimed in claim 5, wherein: an arc surface (222) is arranged at one end, close to the supporting block (12), of the abutting block (22), and the center of the arc surface (222) protrudes towards one side of the supporting block (12).

8. The compensating chuck as claimed in claim 7, wherein: a strip-shaped groove (122) is formed in the side face, facing the supporting block (22), of one side of the supporting block (12), and the end portion, close to the supporting block (12), of the supporting block (22) abuts against the bottom wall of the strip-shaped groove (122) and is movably connected to the strip-shaped groove (122).

9. A compensating chuck as claimed in claim 1, wherein: the side face, facing the clamping jaws (14), of one side of the disc seat (1) is coaxially provided with a tip (17), and the tip (17) is used for abutting against a positioning shaft workpiece.