CN111774887A

CN111774887A - Revolving platform and anchor clamps

Info

Publication number: CN111774887A
Application number: CN202010666268.4A
Authority: CN
Inventors: 颜炳姜; 朱小康; 李俊宏
Original assignee: Smartguy Intelligent Equipment Co ltd; Conprofe Technology Group Co Ltd
Current assignee: Smartguy Intelligent Equipment Co ltd; Conprofe Technology Group Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2020-10-16

Abstract

The invention relates to the technical field of machining centers, in particular to a rotary table and a fixture, which comprise a chuck, wherein the chuck is provided with a sliding hole, and the sliding hole extends along the radial direction of the chuck and penetrates through the upper end and the lower end of the chuck; the clamping parts comprise clamping parts for clamping workpieces and sliding parts fixedly connected with the clamping parts, the clamping parts are arranged at the upper ends of the sliding holes, and the sliding parts are arranged at the lower ends of the sliding holes; and the elastic piece is abutted with the sliding part and used for pushing the clamping pieces of at least two groups to move inwards along the radial direction of the chuck so as to lock the workpiece. The holder passes through the elastic component and provides the clamp force and slide in order to press from both sides tight work piece along the radial inside direction of chuck, need not to adopt pneumatic clamping, improves the reliability and the stability that anchor clamps pressed from both sides tight work piece, in addition, in work piece course of working, provides the clamp force through the elastic component, need not pneumatic equipment and continuously outputs gas, reduction in production cost.

Description

Revolving platform and anchor clamps

Technical Field

The invention relates to the technical field of machining centers, in particular to a rotary table and a clamp.

Background

The clamp for clamping the workpiece by the rotary table in the prior art is generally pneumatically clamped, and under the condition that air pressure equipment fails, the clamp loses the power for clamping the workpiece, so that the workpiece is easy to fly out in the machining process, and production accidents are caused.

Disclosure of Invention

The invention aims to provide a rotary table and a fixture which are beneficial to improving the safety and stability of a production process and reducing the production cost.

In order to achieve the above object, the present invention provides a jig comprising:

the chuck is provided with a sliding hole, and the sliding hole extends along the radial direction of the chuck and penetrates through the upper end and the lower end of the chuck;

the clamping pieces comprise clamping parts for clamping workpieces and sliding parts fixedly connected with the clamping parts, the clamping parts are arranged at the upper ends of the sliding holes, and the sliding parts are arranged at the lower ends of the sliding holes;

and the elastic piece is abutted against the sliding part and used for pushing the clamping pieces of at least two groups to move inwards along the radial direction of the chuck so as to lock the workpiece.

Optionally, the elastic member includes a spring, an axis of the spring is arranged in a radial direction of the chuck, and one end of the spring abuts against the sliding portion.

Optionally, the elastic component further comprises an adjusting screw, the chuck is provided with an adjusting hole, the adjusting screw is in threaded connection with the adjusting hole, one end of the spring abuts against the sliding portion, and the other end of the spring abuts against the adjusting screw.

Optionally, the clamping device further comprises a pushing member abutting against the sliding portion, and the pushing member can push the clamping member to move to unlock the workpiece when moving in the axial direction of the chuck.

Optionally, the pushing member includes a pushing block and an inclined pushing block mounted on the pushing block, the outer peripheral wall of the inclined pushing block abuts against the sliding portion, the pushing block is provided with a guide groove arranged along the radial direction of the chuck, and the sliding portion is movably disposed in the guide groove.

Optionally, the pushing member is provided with a guide hole, a guide post with an axis perpendicular to the radial direction of the chuck penetrates through the guide hole, and the pushing member slides along the axial direction of the guide post.

Optionally, a guide inclined plane is disposed at an end of the sliding portion away from the elastic member, the pushing member is provided with a guide inclined plane and arranged opposite to the guide inclined plane of the sliding portion, when the pushing member moves along the axial direction, the sliding portion is pushed to move along an inclined direction of the guide inclined plane relative to the pushing member, and the guide inclined plane is inclined from the radial outer side of the chuck to the inner side of the chuck.

Optionally, the guide slope is inclined from bottom to top and from the outer side to the inner side in the radial direction of the chuck.

Optionally, a rolling member is disposed at a position where the sliding portion abuts against the pushing member, and the rolling member abuts against the sliding portion and the pushing member, respectively.

Optionally, the chuck further comprises an upper limiting plate and a lower limiting plate, wherein the upper limiting plate and the lower limiting plate are respectively arranged above and below the rolling member to limit the moving range of the rolling member along the direction perpendicular to the radial direction of the chuck.

Optionally, the chuck further comprises a fixed bottom plate connected with an output end of the rotation driving device, and the fixed bottom plate is fixedly connected with the chuck.

Based on the purpose, the invention also provides a rotary table, which comprises the clamp.

The embodiment of the invention has the following technical effects:

according to the turntable and the clamp provided by the invention, the clamping piece is arranged on the chuck in a sliding manner, the clamping piece is enabled to slide along the radial inward direction of the chuck by providing the clamping force through the elastic piece so as to clamp the workpiece, pneumatic clamping is not needed, safety accidents caused by faults of pneumatic equipment are avoided, the reliability and the stability of clamping the workpiece by the clamp are improved, in addition, in the process of processing the workpiece, the clamping force is provided through the elastic piece, the pneumatic equipment is not needed to continuously output gas, and the production cost is reduced.

Drawings

FIG. 1 is a schematic diagram of a turret in one embodiment;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a top view of the clamp and annular cylinder assembly of the preferred embodiment of the present invention;

FIG. 5 is a cross-sectional view taken at B-B of FIG. 4;

FIG. 6 is an exploded view of the clamp and annular cylinder of the preferred embodiment of the present invention;

FIG. 7 is a top view of a preferred embodiment clip of the present invention;

FIG. 8 is a cross-sectional view taken at C-C of FIG. 7;

FIG. 9 is an exploded view of a preferred embodiment clamp of the present invention;

FIG. 10 is a top view of an annular cylinder in one embodiment;

FIG. 11 is a cross-sectional view taken at D-D of FIG. 10;

fig. 12 is an exploded view of an annular cylinder in one embodiment.

Description of reference numerals:

1. the device comprises a rotary driving device 11, a rotary shaft 12, a rotary driving motor 13, a bearing seat 14, an upper bearing 15, a lower bearing 16, a bearing support ring 17, a locking nut 18 and a transmission belt;

2. the device comprises a clamp, 21, a chuck, 211, a sliding hole, 22, an elastic piece, 221, a spring, 222, an adjusting screw, 23, a clamping piece, 231, a clamping part, 232, a sliding part, 233, a guide rod, 234, an adjusting hole, 24, a pushing piece, 241, a pushing block, 242, an inclined pushing block, 243, a guide groove, 244, a guide column, 25, a guide inclined plane, 26, a rolling piece, 27, an upper limiting plate, 28 and a lower limiting plate; 29. fixing the bottom plate;

3. the piston comprises an annular cylinder, 31, an annular piston, 311, a second sealing groove, 312, a third sealing groove, 32, a cylinder sleeve, 321, a first through hole, 322, a second through hole, 323, a first sealing groove, 324, an inner cavity, 33, an inner sleeve, 331, a fourth sealing groove, 332, a base part, 333, an inner hole, 34, a first piston cavity, 35 and a second piston cavity.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In addition, the terms "first", "second", and the like are employed in the present invention to describe various information, but the information should not be limited to these terms, which are used only to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

In addition, it should be noted that, in the description of the present invention, the term "radial direction" refers to a radial extending direction of the chuck, i.e., a direction perpendicular to the rotation axis when the chuck is rotated, and the term "axial direction" refers to an extending direction of the rotation axis of the chuck.

Referring to fig. 1 and 2, one embodiment of the present invention provides a turntable including a rotary drive device 1, a clamp 2, and a ring cylinder 3.

Referring to fig. 2 and 3, in one embodiment of the turntable, the rotary driving device 1 includes a rotary shaft 11; a rotary driving motor 12 which is in transmission connection with the rotary shaft 11 through a transmission belt 18; a bearing housing 13 for mounting and carrying a bearing; the bearing is sleeved outside the rotating shaft 11 and mounted on the bearing seat 13, specifically, the bearing in this embodiment includes an upper bearing 14 and a lower bearing 15, a bearing support ring 16 sleeved on the rotating shaft 11 is disposed between the upper bearing 14 and the lower bearing 15, the bearing support ring 16 includes a bearing inner ring support ring and a bearing outer ring support ring to improve the mounting reliability of the upper bearing 14 and the lower bearing 15, and a lock nut 17 is disposed at a lower end of the lower bearing 15 and connected to the rotating shaft 11 to limit the axial movement of the lower bearing 15.

Specifically, the upper bearing 14 and the lower bearing 15 in this embodiment may be tapered roller bearings to receive radial force generated when the rotating shaft 11 rotates and axial force applied by components carried above the rotating shaft 11.

Referring to fig. 4-9, the clamping apparatus 2 includes a chuck 21, an elastic member 22, and at least two sets of clamping members 23, the chuck 21 is fixedly connected to the rotating shaft 11, the clamping members 23 are disposed on the chuck 21 and can move along a radial direction of the chuck 21, and the elastic member 22 abuts against the clamping members 23 for pushing the at least two sets of clamping members 23 to move inward along the radial direction of the chuck 21 to lock the workpiece.

Specifically, referring to fig. 8 and 9, the clamping member 23 of the present embodiment includes a clamping portion 231 for clamping the workpiece and a sliding portion 232 fixedly connected to the clamping portion 231, the chuck 21 is provided with a sliding hole 211, the sliding hole 211 extends along a radial direction of the chuck 21 and penetrates through an upper end and a lower end of the chuck 21, the clamping member 23 is slidably connected to the sliding hole 211, wherein the clamping portion 231 is disposed at an upper end of the sliding hole 211, and the sliding portion 232 is disposed at a lower end of the sliding hole 211.

Further, referring to fig. 7 to 9, the elastic member 22 in the present embodiment includes a spring 221, an axis of the spring 211 is arranged along a radial direction of the chuck 21, and specifically, one end of the spring 221 abuts against the sliding portion 232, so as to provide an elastic force along the radial direction of the chuck 21 to drive the clamping portion 231 to slide along the radial direction of the chuck 21 to clamp the workpiece.

Referring to fig. 8, the elastic member 22 in this embodiment further includes an adjusting screw 222, the chuck 21 is provided with an adjusting hole 234, the adjusting screw 222 is in threaded connection with the adjusting hole 234, one end of the spring 221 abuts against the sliding portion 232, and the other end abuts against the adjusting screw 222, so that the adjusting screw 222 can move relative to the adjusting hole 234 by rotating the adjusting screw 222, thereby adjusting the compression amount of the spring 221, further changing the elastic force of the spring 221 acting on the clamping member 23, and realizing the clamping force effect of the clamping member 23.

Further, referring to fig. 3 and 9, as an embodiment of the turntable provided in the present invention, the turntable further includes a fixing base plate 29 for coupling with the rotating shaft 11, the fixing base plate 29 is fixedly coupled with the chuck 21 to facilitate coupling of the chuck 21 and the rotating shaft 11, and in particular, the fixing base plate 29 is fixedly coupled with the chuck 21 by bolts.

Referring to fig. 9, further, the clamping apparatus 2 of the present embodiment further includes a pushing member 24 abutting against the sliding portion 232, and the pushing member 24 can push the clamping member 23 to move to unlock the workpiece when moving in the axial direction of the chuck 21.

In the present embodiment, the number of the grippers 23 is four, and four sets of grippers 23 are uniformly arranged in the circumferential direction of the pusher 24, so that the gripping is stabilized from four directions when gripping the workpiece.

Optionally, the sliding portion 232 and the pushing member 24 are both provided with a guiding inclined surface 25, wherein one end of the sliding portion 232 away from the elastic member 22 is provided with the guiding inclined surface 25, the guiding inclined surface 25 of the pushing member 24 is arranged opposite to the guiding inclined surface 25 of the sliding portion 232, specifically, the pushing member 24 is arranged below the sliding portion 232, and the guiding inclined surface 25 is inclined from bottom to top and from the outer side to the inner side in the radial direction of the chuck 21, so that when the pushing member 24 moves upwards along the axial direction of the chuck 21, the pushing member 24 pushes four groups of clamping members 23 arranged along the outer circumferential direction of the pushing member 24 to move along the guiding inclined surfaces 25 to the outer side in the radial direction of the chuck 21.

In another embodiment, the pushing member 24 is disposed above the sliding portion 232, and the guiding inclined surface 25 is inclined from bottom to top and from the inner side to the outer side in the radial direction of the chuck 21, so that when the pushing member 24 unlocks the workpiece, the pushing member 24 moves axially downward, and the pushing member 24 pushes the four groups of clamping members 23 arranged along the outer circumferential direction of the pushing member 24 to move along the guiding surface 25 to the outer side in the radial direction of the chuck 21, thereby unlocking the workpiece.

Referring to fig. 8 and 9, in order to reduce the friction force of the contact surface between the sliding part 232 and the pushing part 24 during the relative movement, a rolling member 26 is arranged at the abutting part between the sliding part 232 and the pushing part 24, and the rolling member 26 abuts against the sliding part 232 and the pushing part 24 respectively, so that the friction force of the relative movement between the sliding part 232 and the pushing part 24 is reduced, the abrasion of the abutting surface between the sliding part 232 and the pushing part 24 is reduced, and the service life of the equipment is prolonged.

Furthermore, in order to ensure that the rolling member 26 always abuts against the sliding part 232 and the pushing member 24 when the sliding part 232 and the pushing member 24 move relatively, the present embodiment further includes an upper limiting plate 27 and a lower limiting plate 28, the upper limiting plate 27 and the lower limiting plate 28 are respectively disposed above and below the rolling member 26, in the present embodiment, the upper limiting plate 27 is fixedly mounted at the upper end of the guiding inclined plane 25, the rolling member 26 is limited from leaving the sliding part 232 from the upper end of the guiding inclined plane 25, the lower limiting plate 28 is fixedly mounted on the fixing bottom plate 29, when the pushing member 24 moves downward relative to the fixing bottom plate 29, the lower limiting plate 28 moves upward relative to the guiding inclined plane 25, thereby blocking the rolling member 26 from moving downward along with the pushing member 24 to separate from the sliding part 232, and realizing the limitation of the moving range of the rolling member 26 in the radial direction of the vertical chuck.

Referring to fig. 9, in particular, the pushing member 24 of the present embodiment includes a pushing block 241 and an inclined pushing block 242 mounted on the pushing block 241, and an outer peripheral wall of the inclined pushing block 242 abuts against the sliding portion 232, it can be understood that the outer peripheral wall of the inclined pushing block 242 is formed with the above-mentioned guiding inclined surface 25, so that when the pushing member 24 moves along a direction perpendicular to a radial direction of the chuck 21, the inclined pushing block 242 pushes the clamping member 23 to move, in addition, the pushing block 241 is provided with a guiding groove 243 arranged along the radial direction of the chuck 21, and the sliding portion 232 is movably disposed in the guiding groove 243, so that the sliding portion 232 slides along the guiding groove 243, thereby improving the moving stability of the sliding portion 232.

It can be understood that, in the present embodiment, the inclined push block 242 corresponds to four sets of clamping members 23, and is provided with four guiding inclined surfaces 25, and the four guiding inclined surfaces 25 are provided with corresponding rolling members 26, respectively, and the rolling members 26 are cylindrical pins.

The sliding portion 232 is connected with a guide rod 233, the guide rod 233 can penetrate through the sliding hole 211 to be connected with the clamping portion 231, and the sliding portion 232 is matched with the sliding hole 211 in shape, so that the guide rod 233 can only move along the radial direction of the chuck 21, the stability of the movement of the clamping piece 23 is improved, and particularly, the clamping portion 231 is fixedly connected with the guide rod 233 through a bolt.

Referring to fig. 6, in order to improve the stability of the pushing member 24 moving along the direction perpendicular to the radial direction of the chuck 21, the pushing member 24 of this embodiment is provided with a guide hole, a guide post 244 whose axis is perpendicular to the radial direction of the chuck 21 penetrates through the guide hole, the pushing member 24 slides along the axial direction of the guide post 244, specifically, the outer peripheral walls of the two ends of the guide post 244 are provided with threads, and the two ends of the guide post 244 are respectively connected to the chuck 21 and the fixed base plate 29 through the threads.

In addition, the pushing member 24 is provided with a through hole, and the fixing base plate 29 is fixedly connected with the chuck 21 by a bolt which is inserted into the through hole.

Further, referring to fig. 10 to 12, the ring cylinder 3 of the present embodiment includes a ring piston 31, and the above-mentioned revolving shaft 11 is inserted into the radial direction inside of the ring piston 31; the cylinder sleeve 32 is provided with an inner cavity 324, and the inner cavity 324 penetrates through two axial ends of the cylinder sleeve; the inner sleeve 33 is provided with an inner hole 333, the inner hole 333 penetrates through two axial ends of the inner sleeve 33, and the inner sleeve 33 penetrates through the inner cavity 324;

specifically, the annular piston 31 is sleeved on the outer peripheral side of the inner sleeve 33 and penetrates through the inner cavity 324, a first piston cavity 34 is formed by the annular piston 31 and the inner side wall of the cylinder sleeve 32, a second piston cavity 35 is formed by the annular piston 31, the inner side wall of the cylinder sleeve 32 and the outer side wall of the inner sleeve 33, the first piston cavity 34 and the second piston cavity 35 are not communicated with each other, the annular piston 31 can move in the axial direction relative to the cylinder sleeve 32 and the inner sleeve 33, and the clamping piece is pushed by the pushing piece 24 to move outwards in the radial direction of the chuck 21 so as to unlock the workpiece.

Thus, on one hand, after the cylinder sleeve 32, the inner sleeve 33 and the annular piston 31 are assembled, the inner hole 333 can be used for the rotating shaft 11 to pass through, so that the rotating shaft 11 is not required to be arranged in a staggered way with the cylinder when the rotating shaft 11 is arranged, the structure of the equipment is more compact, the occupied space of the equipment is reduced, on the other hand, the annular piston 31 is arranged to form a first piston cavity 34 with the inner side wall of the cylinder sleeve 32 and a second piston cavity 35 with the inner side wall of the cylinder sleeve 32 and the outer side wall of the inner sleeve 33 respectively, the annular piston 31 moves relative to the cylinder sleeve 32 and the inner sleeve 33 in the axial direction to output power by introducing pneumatic pressure to the first piston cavity 34 or the second piston cavity 35, so that the pushing piece 24 is pushed, the clamping part 231 is pushed to unlock the workpiece by the pushing piece 24 abutting against the sliding part 232, and the annular piston 31 has, thereby annular piston 31 is difficult to buckle when receiving radial force, and the lift process is more stable, helps reducing rocking of annular piston 31 upper end, has higher stability.

Specifically, the rotating shaft 11 is rotatably connected in the inner hole 333 of the inner sleeve 33 through the upper bearing 14, the lower bearing 15, the bearing support ring 16 and the bearing seat 13, inner side walls of the upper bearing 14, the lower bearing 15 and the bearing support ring 16 are attached to an outer peripheral wall of the rotating shaft 11, outer side walls of the upper bearing 14, the lower bearing 15 and the bearing support ring 16 are attached to an inner peripheral wall of the inner hole 333, so that the rotating shaft 11 and the inner sleeve 33 can rotate relative to each other, and the bearing seat 13.

Further, referring to fig. 11 and 12, the cylinder liner 32 is provided with a first through hole 321 and a second through hole 322, the first through hole 321 is communicated with the first piston cavity 34, the second through hole 322 is communicated with the second piston cavity 35, and the pneumatic device is arranged to ventilate the first piston cavity 34 or the second piston cavity 35 respectively, so that the annular piston 31 descends or ascends.

In order to improve the sealing performance of the first piston cavity 34, the inner peripheral wall of the upper end of the cylinder liner 32 of the embodiment is provided with a first flange, one side of the first flange facing the annular piston 31 is provided with a first sealing groove 323 for accommodating a first sealing ring, further, the outer peripheral wall of the lower end of the annular piston 31 is provided with a second flange, one side of the second flange facing the cylinder liner 32 is provided with a second sealing groove 311 for accommodating a second sealing ring, so that the first sealing ring and the second sealing ring are respectively arranged in the first sealing groove 323 and the second sealing groove 311, one end surface of the first sealing ring facing away from the first sealing groove 323 is abutted against the annular piston 31, and one end surface of the second sealing ring facing away from the second sealing groove 311 is abutted against the inner peripheral wall of the cylinder liner 32, so as to realize and ensure the sealing effect of the first.

Similarly, in order to ensure the sealing effect of the second piston cavity 35, the third sealing groove 312 for accommodating the third sealing ring is provided on the inner peripheral wall of the annular piston 31, the outer peripheral wall of the lower end of the inner sleeve 33 is provided with a third flange, the fourth sealing groove 331 for accommodating the fourth sealing ring is provided on the third flange facing the side face of the cylinder sleeve 32, the end face of the third sealing groove 312 facing away from the third sealing ring is abutted against the outer peripheral wall of the inner sleeve 33, the end face of the fourth sealing groove 331 facing away from the fourth sealing ring is abutted against the inner peripheral wall of the cylinder sleeve 32, so as to achieve the sealing effect of the second piston cavity 35.

Further, a bottom seat portion 332 is provided at the lower end of the inner sleeve 33, the lower end surface of the cylinder liner 32 abuts against the upper surface of the bottom seat portion 332, and the cylinder liner 32 and the bottom seat portion 332 are fixedly connected by bolts, thereby improving the stability of the relative position between the cylinder liner 32 and the inner sleeve 33.

Therefore, the working steps of the rotary table provided by the invention are as follows:

step 1, the pneumatic equipment introduces gas into the second piston cavity 35, the annular piston 31 moves upwards in the axial direction under the action of pneumatic pressure, when the annular piston moves to be in contact with the pushing part 24, the pushing part 24 abuts against the guide inclined plane 25 of the sliding part 232, at the moment, the pushing part 24 moves upwards in the axial direction, the clamping pieces 23 overcome the elastic force of the spring 221 and move outwards in the radial direction of the chuck, and a plurality of groups of clamping pieces 23 are opened;

step 2, placing the workpiece into the clamping position of the chuck 21, removing the pneumatic pressure in the second piston cavity 35, introducing gas into the first piston cavity 34, so that the annular piston 31 moves axially downwards, at the moment, the sliding part 232 moves radially inwards along the chuck 21 under the elastic force of the spring 221, and the clamping part 231 clamps the workpiece;

step 3, starting output power by the rotary driving motor 12, driving the rotating shaft 11 to rotate, and driving the chuck 21 connected with the rotating shaft 11 to rotate so as to realize the processing of the workpiece;

and (3) after the workpiece is machined, the workpiece can be unlocked by repeating the step 1, and the workpiece is taken down.

In summary, according to the turntable provided by the present invention, on one hand, the rotation driving device 1 is provided, and the rotation driving device is fixedly connected to the chuck 21 through the rotation shaft 11, so as to realize the rotation of the chuck 21, and greatly improve the processing efficiency of the product capable of being rotatably processed; in the second aspect, the clamping piece 23 which can slide relative to the chuck 21 is arranged, the elastic piece 22 provides clamping force, so that the clamping piece 23 slides along the radial direction of the chuck 21 to clamp a workpiece, pneumatic clamping is not needed, safety accidents caused by air pressure faults are avoided, the reliability and stability of clamping the workpiece by the clamp are improved, in addition, in the process of processing the workpiece, the clamping force is provided by the elastic piece 22, air pressure equipment is not needed to continuously output air, and the production cost is reduced; in the third aspect, the annular piston 31 is arranged, the clamping piece 23 is pushed by the annular piston 31 to move in the direction opposite to the elastic force direction so as to unlock the workpiece, wherein the rotating shaft 11 is arranged on the inner side of the annular piston 31 in the radial direction, so that the annular piston 31 is not required to be arranged in a staggered manner with the rotating shaft 11 while the clamping piece 23 is unlocked, and the structure of the rotary table is more compact.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A clamp, comprising:

2. The clamp according to claim 1, wherein the elastic member includes a spring having an axis arranged in a radial direction of the chuck, the spring having one end abutting against the sliding portion.

3. The clamp of claim 2, wherein the elastic member further comprises an adjusting screw, the chuck defines an adjusting hole, the adjusting screw is in threaded connection with the adjusting hole, one end of the spring abuts against the sliding portion, and the other end of the spring abuts against the adjusting screw.

4. The chuck as claimed in claim 1, further comprising a pusher member abutting the slide, the pusher member being capable of pushing the gripping member to move to unlock the workpiece when moving in the axial direction of the chuck.

5. The clamp of claim 4, wherein the pushing member includes a pushing block and an inclined pushing block mounted on the pushing block, the outer peripheral wall of the inclined pushing block abuts against the sliding portion, the pushing block is provided with a guide groove arranged along the radial direction of the chuck, and the sliding portion is movably disposed in the guide groove.

6. The chuck as claimed in claim 4, wherein the pushing member defines a guiding hole, a guiding post is disposed in the guiding hole, the axis of the guiding post is perpendicular to the radial direction of the chuck, and the pushing member slides along the axial direction of the guiding post.

7. The chuck as in claim 4, wherein the end of the sliding part away from the elastic member is provided with a guiding slope, the pushing member is provided with a guiding slope opposite to the guiding slope of the sliding part, the pushing member pushes the sliding part to move along the slope of the guiding slope relative to the pushing member when moving along the axial direction, and the guiding slope is inclined from the outer side to the inner side of the chuck in the radial direction.

8. The jig of claim 7, wherein the guide slope is inclined from bottom to top and from an outer side to an inner side in a radial direction of the chuck.

9. A clamp according to any one of claims 4 to 8, wherein the abutment of the slide with the push member is provided with rolling members which abut the slide and push member respectively.

10. The chuck as claimed in claim 9, further comprising an upper and a lower limiting plate respectively disposed above and below the rollers for limiting a moving range of the rollers in a direction perpendicular to a radial direction of the chuck.

11. The clamp of claim 1, further comprising a fixed base plate for connection to an output of a rotary drive, the fixed base plate being fixedly connected to the chuck.

12. A turntable comprising a clamp according to any one of claims 1 to 11.