CN117245614A - Rotary clamping device - Google Patents

Abstract

The invention relates to the technical field of clamps and discloses a rotary clamping device which comprises a workbench and a turntable which is rotatably arranged on the workbench, clamping plates which can be mutually close to or far away from each other are arranged on the turntable along radial movement of the turntable, the movement of the clamping plates is controlled by a control structure, the control structure comprises a rotating shaft which is rotatably arranged on the workbench and is concentric with the turntable, a motor for driving the rotating shaft to rotate, and a driving structure which is arranged between the rotating shaft and the clamping plates and is used for controlling the clamping plates to mutually close to or far away from each other when the rotating shaft positively and negatively rotates, elastic clamping adsorption structures which are used for clamping workpieces when the clamping plates are mutually close to each other or are separated from the workpieces when the clamping plates are mutually far away from each other are arranged on opposite surfaces of the two clamping plates, a linkage structure which is used for controlling the synchronous rotation of the turntable and the rotating shaft after the elastic clamping adsorption structures clamp the workpieces and a switching structure which is used for controlling the synchronous rotation of the linkage structure to reset are arranged between the clamping plates and the rotating shaft.

Description

Rotary clamping device

Technical Field

The invention relates to the technical field of clamps, in particular to a rotary clamping device.

Background

In the processing of metal parts of automobile parts, when surface treatment is required, the workpiece is often required to be clamped for rotary processing, so that a clamping and rotating device is required.

The Chinese patent with the application number of CN201620232681.9 discloses a clamping and rotating device, which comprises a frame, wherein a rotary servo motor is fixed on the bottom surface of a top plate of the frame, an output shaft of the rotary servo motor vertically upwards extends out of the top plate of the frame and is fixedly provided with a rotary clamping bottom plate, at least four connecting plates are fixed on the top surface of the rotary clamping bottom plate, clamping cylinders are fixed on the connecting plates, and push rods of the clamping cylinders penetrate through the connecting plates and are fixedly provided with arc-shaped clamping blocks.

But in this centre gripping rotary device centre gripping cylinder sets up on rotatory centre gripping bottom plate, and at rotatory centre gripping bottom plate rotation in-process, the air route and the circuit line of centre gripping cylinder rotate along with the cylinder together, can lead to each circuit winding to twine even to die, lead to rotatory centre gripping bottom plate unable smooth rotation, and the centre gripping cylinder also can cause the damage to oneself at quick rotatory in-process, has consequently appeared realizing the centre gripping rotation to the work piece under the fixed circumstances of guaranteeing the centre gripping cylinder.

The chinese patent with application number CN202120759113.5 discloses a rotary clamping mechanism, including clamping mechanism, rotary mechanism and link mechanism, the clamping mechanism includes the mount pad, remove the output shaft that sets up in the mount pad and have a relative tip and an output and along the fixed telescopic element who sets up on the mount pad of extending direction of output shaft, the output and the telescopic element of output shaft rotate and are connected, still include clamping element, clamping element includes the rotary seat of locating the tip by fixed cover and along two at least clamping arms of the circumference symmetric distribution of tip, wherein clamping arm has clamping part, rotary part and spacing portion, when the output shaft is driven by telescopic element and moves along the axial, the clamping part of two at least clamping arms can open relatively or press from both sides tightly, wherein link mechanism is set up and can be driven and make the output shaft rotate by rotary mechanism between output shaft and rotary mechanism, telescopic element is the cylinder, rotary mechanism is servo motor.

The rotary clamping mechanism clamps the workpiece by controlling the clamping part to open or clamp through the air cylinder, and because the output shaft and the air cylinder are rotationally connected, the air cylinder cannot rotate when the servo motor drives the output shaft to rotate to drive the workpiece to rotate, but the clamping function of the rotary clamping mechanism is realized by the air cylinder, and the rotating function is controlled by the servo motor, so that the cost is higher.

Disclosure of Invention

The invention aims to provide a rotary clamping device which realizes clamping and rotating functions through one motor, avoids winding wires and reduces cost.

In order to solve the technical problems, the invention is solved by the following technical scheme: the utility model provides a rotatory clamping device, including the workstation and rotate the carousel that sets up on the workstation, be provided with along the radial removal of carousel on the carousel and be close to each other or keep away from splint, the removal of splint is controlled by control structure, control structure includes on the workstation rotate set up and with carousel pivoted pivot, drive pivot pivoted motor and set up between pivot and splint when pivot forward and backward rotation control splint be close to each other or keep away from driving structure, be provided with the elastic clamping adsorption structure who breaks away from the work piece when splint are close to each other or when splint keep away from each other on the face that two splint are just right, be provided with between splint and the pivot and control carousel and pivot synchronous pivoted linkage structure and the switching structure that control linkage structure reset after elastic clamping adsorption structure centre gripping work piece.

By adopting the scheme, compared with the prior art that the clamping function of the rotary clamping mechanism is realized by the air cylinder, the rotation function is controlled by the servo motor, and the cost is higher, in the scheme, when the workpiece is clamped by matching the linkage structure and the switching structure, the rotating shaft and the turntable can rotate relatively, the motor drives the rotating shaft to rotate, the rotating shaft rotates to control the driving structure to drive the clamping plates to be close to each other until the elastic clamping adsorption structure is abutted against the surface of the workpiece, the rotating shaft continuously rotates, the elastic clamping adsorption structure realizes the elastic clamping and negative pressure adsorption of the workpiece, so that the workpiece is clamped, the linkage structure is effective at the moment, the rotating shaft and the turntable synchronously rotate, the motor continuously rotates, the workpiece can be controlled to rotate for processing, the clamping and rotating functions are realized by one motor, and the cost is reduced; when the workpiece is taken down, the switching structure controls the linkage structure to be in a reset state, the rotating shaft and the rotating disc do not synchronously rotate any more, the motor drives the rotating shaft to reversely rotate at the moment, the rotating disc is in a state of stopping rotating, and the driving structure can be controlled to drive the clamping plates to be mutually far away until the elastic clamping adsorption structure is separated from the surface of the workpiece, and the workpiece is taken down to finish machining. Meanwhile, compared with the clamping plate which directly clamps the workpiece, the clamping plate cannot clamp the workpiece when the force is small, the workpiece is easy to damage when the force is large, and the elastic clamping adsorption structure is matched with the clamping plate through elastic clamping and negative pressure adsorption, so that the workpiece is protected while the clamping force is ensured.

Preferably, the elastic clamping adsorption structure comprises a gas storage channel arranged in the clamping plate, a piston arranged in the gas storage channel in a sealing sliding manner along the moving direction of the clamping plate, a hollow hard tube which passes through the clamping plate and is arranged on the piston in an extending manner towards the direction close to the workpiece, a sucking disc which is arranged at one end of the hollow hard tube far away from the piston and is communicated with the hollow hard tube, a through hole which is arranged in the gas storage channel and is arranged on the hollow hard tube and is used for enabling the gas storage channel to be communicated with the hollow hard tube, and a spring which is arranged between the sucking disc and the clamping plate along the moving direction of the clamping plate.

By adopting the scheme, in the process of mutually approaching the clamping plates, the surfaces of the suction disc and the workpiece are in sealing butt joint, and the suction disc can be pushed to move close to the clamping plates along with the further mutual approaching of the clamping plates, so that the hollow hard tube and the piston are driven to move; the clamping plates are far away from each other, and under the combined action of the spring force and the suction force of the suction disc on the workpiece, the suction disc moves away from the clamping plates, so that the volume of one side of the gas storage channel, which is close to the workpiece, is gradually reduced, and the air pressure in the gas storage channel is gradually increased, so that the air pressure in the inner cavity of the suction disc is increased, and the separation from the workpiece is realized.

Preferably, the linkage structure comprises a hollow shaft which is rotatably arranged on the workbench, is concentrically connected with the turntable and can be penetrated by the rotating shaft, a telescopic groove concavely arranged on the inner annular wall of the hollow shaft, a locking groove concavely arranged on the outer annular wall of the rotating shaft, a locking block which is arranged in the telescopic groove in a penetrating way or retracted way when the locking block is in penetrating way or retracted when the locking block is in a telescopic way in the telescopic groove, and an extending structure which is arranged between the telescopic groove and the clamping plate and controls the locking block to partially extend, wherein the extending structure is controlled by the movement of the piston, and the retraction of the locking block is controlled by the switching structure.

By adopting the scheme, when a workpiece is clamped, the sucker pushes the piston to move, the extension structure is controlled to drive the locking block to partially extend until the locking block is in interpenetration fit with the locking groove, so that the synchronous rotation of the rotating shaft and the hollow shaft can be realized, and the turntable is driven to synchronously rotate. When the workpiece is taken down, the switching structure drives the locking block to retract into the telescopic groove and separate from the locking block, the linkage structure resets, and the rotating shaft can rotate relative to the hollow shaft.

Preferably, the extending structure comprises an air storage chamber which is arranged in the clamping plate and is communicated with one end of the air storage channel, which is far away from the sucker, and an air hose, the two ends of which are respectively communicated with the air storage chamber and the telescopic groove in a sealing and sliding manner, and the locking block is matched with the telescopic groove in a sealing and sliding manner.

By adopting the scheme, the piston moves close to the air storage chamber, gas on one side of the air storage channel away from the workpiece is pressed into the air storage chamber, and the air storage chamber, the ventilation hose and the telescopic groove are communicated in a sealing manner, so that the air pressure in the telescopic groove is increased, and the locking block is driven to partially extend until the locking block is matched with the locking groove in an inserting manner.

Preferably, the switching structure comprises a first tension spring arranged in the expansion groove along the moving direction of the locking block, a communicating pipe arranged on the clamping plate and used for enabling the air storage chamber to be communicated with the outside, and a stop valve arranged on the communicating pipe and used for controlling the opening and closing of the communicating pipe, wherein the locking block is contained in the expansion groove when the first tension spring is in an initial state.

By adopting the scheme, when the locking block locally stretches out, the first tension spring deforms to generate elasticity, the stop valve is opened, the air storage chamber is communicated with the outside, so that the air pressure in the air storage chamber, the ventilation hose and the telescopic groove is reduced to normal pressure, the locking block can be driven to retract into the telescopic groove under the action of the reset elasticity of the first tension spring, the linkage structure is reset, the clamping plates are mutually far away until the piston is reset, the stop valve is closed, and the next use is waited.

Preferably, the driving structure comprises a guide structure arranged between the clamping plate and the turntable for driving the clamping plate to linearly move and a driving part arranged between the rotating shaft and the clamping plate for controlling the clamping plate to mutually approach or separate, and the driving part is controlled by the rotation of the rotating shaft.

By adopting the scheme, the rotating shaft rotates, and the driving part is controlled to drive the clamping plates to be close to or far away from each other; the linear movement of the clamping plate is ensured through the guide structure.

Preferably, the guiding structure comprises a guiding block arranged on the lower bottom surface of the clamping plate and a guiding groove arranged on the turntable for the guiding block to be embedded and slipped.

By adopting the scheme, the guide blocks are embedded into the guide grooves, so that the clamping plates cannot be separated from the turntable, and the guide blocks and the guide grooves are in guiding sliding fit, so that the linear movement of the clamping plates is ensured, and the stable clamping of the workpiece is ensured.

Preferably, the driving part comprises a through groove which is arranged in the turntable along the radial direction of the turntable and is used for enabling the two guide grooves to be communicated and an avoidance groove which is arranged on the turntable and is concentric with the turntable, one end of the rotating shaft, which is far away from the motor, passes through the avoidance groove and is positioned in the through groove, a rope which is respectively connected with the two guide blocks is arranged in the through groove on the rotating shaft, a second tension spring is arranged between the guide blocks and the guide grooves along the moving direction of the guide blocks, and when the second tension spring is in an initial state, the clamping plate is far away from the workpiece.

By adopting the scheme, the rotating shaft rotates the winding rope, the guide blocks are controlled to be close to each other, the clamping plates are driven to be close to each other, and the second tension spring deforms to generate elasticity; the rotating shaft reversely rotates to pay out the ropes, and the guide blocks are mutually far away under the action of the reset elastic force of the second tension spring.

Preferably, the cross sections of the guide blocks and the guide grooves are arranged in an inverted T shape or a dovetail shape.

By adopting the scheme, the arrangement of the inverted T shape or the dovetail shape can ensure the embedded sliding fit between the guide block and the guide groove.

Preferably, the elastic clamping adsorption structure is provided with at least one group on the clamping plate at intervals.

By adopting the scheme, the elastic clamping and negative pressure adsorption of the workpieces can be guaranteed by arranging a group of elastic clamping and negative pressure adsorption devices, a plurality of groups of elastic clamping adsorption structures can be guaranteed to be in contact with the surfaces of articles as much as possible when the workpieces in different shapes are clamped, the contact area is increased, the elastic clamping force and the adsorption force are increased, and the clamping stability is guaranteed.

The invention has the remarkable technical effects due to the adoption of the technical scheme:

the motor drives the rotating shaft to rotate the winding rope, the sucker is in sealing abutting joint with the surface of the workpiece in the process that the clamping plates are continuously close to each other, the piston is controlled to move, at the moment, the sucker elastically clamps and adsorbs the workpiece under negative pressure, meanwhile, the linkage structure is controlled to drive the rotating shaft and the rotating disc to synchronously rotate, and the rotating shaft continuously rotates to drive the rotating disc to rotate, so that the rotary clamping is realized; the switching structure controls the linkage structure to reset, the rotating shaft can rotate relative to the rotating disc, the motor drives the rotating shaft to reversely rotate to release the rope, and the clamping plates are mutually far away under the action of the second tension spring to enable the sucker to be separated from the workpiece.

Closing the stop valve, enabling the clamping plates to be close to each other, realizing elastic clamping and negative pressure adsorption on the workpiece through the sucking disc, enabling the piston to be close to the air storage chamber and move in a sealing manner in the process, increasing air pressure in the telescopic groove, driving the locking block to extend out partially until the locking block is matched with the locking groove in a penetrating manner, and enabling the rotating shaft and the rotating disc to rotate synchronously; when the workpiece is taken down, the stop valve is opened, the air storage chamber is communicated with the outside, the air pressure is reduced to normal pressure, the locking block is retracted into the telescopic groove under the action of the first tension spring, the linkage structure is reset, the clamping and rotating functions are realized through the motor through the 2 advantages, and the cost is reduced while the winding is avoided.

Drawings

FIG. 1 is an exploded view of a rotary clamping device according to an embodiment;

fig. 2 is an enlarged view at a in fig. 1;

FIG. 3 is an isometric view of a rotary clamping device according to an embodiment without clamping a workpiece;

FIG. 4 is a top view of an embodiment of a rotary clamping device without clamping a workpiece;

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

FIG. 6 is an enlarged view at C in FIG. 5;

fig. 7 is an enlarged view of D in fig. 6;

FIG. 8 is an enlarged view of a portion of a rotary clamping device in an embodiment for clamping a workpiece;

fig. 9 is an enlarged view at E in fig. 8.

The names of the parts indicated by the numerical reference numerals in the above drawings are as follows: 1. a work table; 2. a turntable; 3. a clamping plate; 4. a rotating shaft; 5. a motor; 6. a gas storage channel; 7. a piston; 8. a hollow hard tube; 9. a suction cup; 10. a through hole; 11. a spring; 12. a hollow shaft; 13. a telescopic slot; 14. a locking groove; 15. a locking block; 16. an air storage chamber; 17. a ventilation hose; 18. a first tension spring; 19. a communicating pipe; 20. a stop valve; 21. a guide block; 22. a guide groove; 23. a through groove; 24. an avoidance groove; 25. a rope; 26. a second tension spring; 27. a gear set; 28. a workpiece.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Examples

The utility model provides a rotatory clamping device, refers to fig. 1 through 9, includes workstation 1, and the upper table surface of workstation 1 is concave to be equipped with first recess, is provided with first rolling bearing in the first recess, is provided with hollow shaft 12 in the first rolling bearing, realizes the swivelling joint between hollow shaft 12 and the workstation 1. The hollow shaft 12 is connected with the carousel 2 on the one end that keeps away from workstation 1, and carousel 2 and hollow shaft 12 are concentric to be set up, therefore carousel 2 rotation sets up on workstation 1. Two guide grooves 22 are concavely arranged on the upper surface of the turntable 2 according to the central symmetry of the turntable 2, guide blocks 21 are respectively arranged in the two guide grooves 22, the guide blocks 21 can linearly move in the guide grooves 22 along the direction close to or far from the center of the turntable 2, and the cross sections of the guide blocks 21 and the guide grooves 22 are in an inverted T shape, so that the guide blocks 21 are limited to be separated from the guide grooves 22. In this embodiment, the upper top surfaces of the guide blocks 21 are flush with the upper surface of the turntable 2, and the clamping plates 3 are respectively arranged on the upper top surfaces of the two guide blocks 21, so that the clamping plates 3 can be controlled to be close to or far away from each other by controlling the guide blocks 21 to be close to or far away from each other.

A control structure is provided between the turntable 2 and the table 1 for controlling the approaching and separating of the guide blocks 21 from each other. The control structure comprises a motor 5 arranged below the workbench 1, a second groove is concavely arranged on the lower bottom surface of the workbench 1, a second rotating bearing is arranged in the second groove, a rotating shaft 4 is arranged in the second rotating bearing, the rotating connection between the rotating shaft 4 and the workbench 1 is realized, the rotating shaft 4, a hollow shaft 12 and the rotary table 2 are coaxially arranged, a gear set 27 is arranged between the motor 5 and the rotating shaft 4, and the motor 5 drives the rotating shaft 4 to rotate through the gear set 27. One end of the rotating shaft 4 far away from the motor 5 sequentially passes through the workbench 1, the hollow shaft 12 and the rotating disc 2 and then is positioned in the rotating disc 2, a driving structure is arranged between one end of the rotating shaft 4 positioned in the rotating disc 2 and the guide block 21, when the rotating shaft 4 rotates positively and negatively, the guide block 21 is controlled to be close to or far away from each other through the driving structure, and an avoidance groove 24 for the rotating shaft 4 to pass through is arranged in the rotating disc 2.

The driving structure comprises a through groove 23 which is arranged in the turntable 2 along the radial direction of the turntable 2 and is used for enabling the two guide grooves 22 to be communicated, one end of the rotating shaft 4, which is positioned in the turntable 2, is positioned in the through groove 23, a rope 25 is arranged on the rotating shaft 4 in the through groove 23, the rotating shaft 4 is fixedly connected with the center of the rope 25, two ends of the rope 25 are respectively fixedly connected with the two guide blocks 21, a second tension spring 26 is arranged between one end of the guide block 21, which is far away from the rope 25, and one side of the guide groove 22, which is far away from the rotating shaft 4, and the second tension spring 26 is arranged along the moving direction of the guide block 21. When the second tension spring 26 is in an initial state, the clamping plate 3 is far away from the workpiece 28, the motor 5 controls the rotating shaft 4 to rotate the winding rope 25 to drive the two guide blocks 21 to synchronously approach, so that the clamping plate 3 can be driven to approach each other, and at the moment, the second tension spring 26 deforms to generate elasticity; the motor 5 controls the rotating shaft 4 to reversely rotate to pay out the rope 25, and the clamping plates 3 are mutually far away from the workpiece 28 under the elastic action of the second tension spring 26.

The clamping plates 3 directly clamp the workpiece 28, the workpiece 28 cannot be clamped when the force is small, the workpiece 28 is easy to damage when the force is large, therefore, elastic clamping adsorption structures are respectively arranged on the opposite surfaces of the two clamping plates 3, the workpiece 28 is protected while the clamping force is ensured through elastic clamping and negative pressure adsorption cooperation, the elastic clamping adsorption structures comprise air storage channels 6 arranged in the clamping plates 3, a piston 7 is arranged in the air storage channels 6 in a sealing sliding manner along the moving direction of the clamping plates 3, a hollow hard tube 8 is arranged on the piston 7 in an extending manner along the direction close to the workpiece 28, one end of the hollow hard tube 8, far away from the piston 7, passes through the clamping plates 3, is positioned outside the clamping plates 3, a through hole 10 is arranged at one end of the hollow hard tube 8, which is positioned in the air storage channels 6, the through hole 10 enables the air storage channels 6 to be communicated with the hollow hard tube 8, one end of the hollow hard tube 8, which is far away from the piston 7, is provided with a sucker 9, and an inner cavity of the sucker 9 are communicated with the air storage channels, a spring 11 is arranged between the sucker 9 and the clamping plates 3, and the spring 11 is arranged along the moving direction of the 3, and is sleeved on the clamping plates 8. When the spring 11 is in an initial state, the sucker 9 is far away from the clamping plate 3, in the process of mutually approaching the clamping plate 3, the surfaces of the sucker 9 and the workpiece 28 are in sealing abutting joint, and along with the further mutual approaching of the clamping plate 3, the sucker 9 can be pushed to move close to the clamping plate 3, and the spring 11 is extruded to deform to generate elasticity, so that elastic clamping is realized; meanwhile, the sucker 9 is close to the clamping plate 3 and can drive the hollow hard tube 8 and the piston 7 to move, the volume of one side of the gas storage channel 6 close to the workpiece 28 is gradually increased, and under the condition that the gas quantity is unchanged, the internal gas pressure is gradually reduced, so that the gas pressure in the inner cavity of the sucker 9 is reduced, and negative pressure adsorption to the workpiece 28 is realized. In the process that the clamping plates 3 are away from each other, under the combined action of the elasticity of the spring 11 and the suction force of the suction disc 9 on the workpiece 28, the suction disc 9 moves away from the clamping plates 3, so that the volume of one side of the gas storage channel 6, which is close to the workpiece 28, is gradually reduced, and the internal gas pressure is gradually increased, so that the gas pressure in the inner cavity of the suction disc 9 is converted from negative pressure to normal pressure, and separation from the workpiece 28 is realized. The elastic clamping and adsorbing structure is provided with at least one group at intervals on the clamping plate 3, the elastic clamping and negative pressure adsorption of the workpieces 28 can be guaranteed by the arrangement of the group, the plurality of groups are arranged, the surface butt joint of the sucking discs 9 and the workpieces 28 can be guaranteed as much as possible when the workpieces 28 with different shapes are clamped, the contact area is increased, the elastic clamping force and the adsorption force are increased, and the clamping stability is guaranteed.

According to the above-described structure, the clamping of the workpiece 28 can be controlled by the rotation of the motor 5, in order to realize the simultaneous realization of the clamping and rotating functions by one motor 5, a linkage structure is arranged between the clamping plate 3 and the rotating shaft 4, after the workpiece 28 is clamped by the elastic clamping adsorption structure, the linkage structure controls the rotating disc 2 and the rotating shaft 4 to synchronously rotate, a switching structure for controlling the reset of the linkage structure is also arranged between the clamping plate 3 and the hollow shaft 12, when the switching structure is effective, the linkage structure is reset, the rotating shaft 4 can rotate relative to the hollow shaft 12 to drive the clamping plate 3 to approach or separate from the workpiece 28, and when the switching structure is reset and the linkage structure is effective, the rotating shaft 4 and the hollow shaft 12 synchronously rotate, so that the rotation of the workpiece 28 is realized.

The linkage structure comprises a locking groove 14 concavely arranged on the outer annular wall of the rotating shaft 4, a telescopic groove 13 concavely arranged on the inner annular wall of the hollow shaft 12, a locking block 15 is arranged in the telescopic groove 13 in a telescopic manner, the locking block 15 and the telescopic groove 13 are in sealing sliding fit, the locking block 15 is partially stretched out and matched with the locking groove 14 in an inserting manner, the clamping plate 3 is accommodated in the telescopic groove 13 and separated from the rotating shaft 4 in a separating manner, an air storage chamber 16 communicated with one end of the air storage channel 6 far away from the sucking disc 9 is arranged in the clamping plate 3, one end of the clamping plate 3 is in sealing communication with the air storage chamber 16, the other end of the clamping hose 17 is in sealing communication with the telescopic groove 13, when a workpiece 28 is clamped, the sucking disc 9 pushes the piston 7 to move close to the air storage chamber 16, gas on one side of the air storage channel 6 far away from the workpiece 28 is pressed into the air storage chamber 16, and the locking block 15 is driven to be partially stretched out until being matched with the locking groove 14, so that synchronous rotation of the rotating shafts 4 and 12 is realized, and the rotating disc 2 is driven to rotate synchronously, and the locking block 15 is enabled to stretch out of the hollow shaft 14 and the hollow shaft 14 is enabled to be in a state of being opposite to be in a sliding manner, and the opposite to the rotating shaft 4 is enabled to be in a sliding manner, and the opposite to the rotating shaft is enabled to be in the opposite to the rotating direction to the rotating shaft 4, and the rotating shaft 4 is positioned between the locking groove 14 and the locking groove 14, and the locking groove 14 is positioned in a sealing groove 14, and the sealing groove is opposite to be in the sealing state, and the sealing groove is opposite to the rotating groove is positioned, and the sealing groove is opposite to the rotating groove 14.

The switching structure comprises a first tension spring 18 arranged in a telescopic groove 13, the first tension spring 18 is arranged along the moving direction of a locking block 15, two ends of the first tension spring 18 are fixedly connected with one side, far away from a rotating shaft 4, of the locking block 15 and one side, far away from the rotating shaft 4, of the telescopic groove 13, when the first tension spring 18 is in an initial state, the locking block 15 is contained in the telescopic groove 13, a communicating pipe 19 which enables an air storage chamber 16 to be communicated with the outside is arranged on a clamping plate 3, a stop valve 20 which controls the opening and closing of the communicating pipe 19 is arranged on the communicating pipe 19, when a workpiece 28 is subjected to rotary machining, the workpiece 28 is required to be taken down, the stop valve 20 is opened, the air storage chamber 16 is communicated with the outside, air pressure in the air storage chamber 16, an air hose 17 and the telescopic groove 13 is reduced to normal pressure, and the first tension spring 18 deforms to generate elasticity when the locking block 15 stretches out, after the telescopic groove 13 is restored to normal pressure, the locking block 15 can be driven to retract into the telescopic groove 13 under the action of the elasticity of the reset of the first tension spring 18, the clamping plates 3 are mutually far away until a piston 7 is reset, the stop valve 20 is closed, and the next use is waited.

When a workpiece 28 is processed, the stop valve 20 is closed, the workpiece 28 is placed on the turntable 2, the motor 5 drives the rotating shaft 4 to rotate the winding rope 25, the guide blocks 21 are driven to be close to each other, the clamping blocks are driven to be close to each other, the second tension springs 26 deform to generate elasticity, the clamping plates 3 move until the suckers 9 are in sealing contact with the surface of the workpiece 28, the rotating shaft 4 continuously rotates to control the clamping plates 3 to be continuously close, at the moment, the suckers 9 move close to the clamping plates 3, the spring 11 deforms to generate elasticity, the elastic clamping of the workpiece 28 is realized, meanwhile, the hollow hard tube 8 and the piston 7 move along with the suckers 9 towards the direction of approaching the air storage chamber 16, at the moment, the internal air pressure of the suckers 9 is reduced, and negative pressure adsorption of the workpiece 28 is realized; the air pressure in the telescopic groove 13 is increased, the local extension of the locking block 15 is pushed to be matched with the insertion of the locking groove 14, the rotating shaft 4 and the hollow shaft 12 synchronously rotate, the rotation of the workpiece 28 is realized, the clamping and rotating functions are realized through one motor 5, and the cost is reduced while the winding is avoided.

After the rotary processing is finished, the stop valve 20 is opened to enable the air storage chamber 16 to be communicated with the outside, so that the air pressure in the air storage chamber 16, the ventilation hose 17 and the telescopic groove 13 is reduced to normal pressure, the first tension spring 18 deforms to generate elasticity when the locking block 15 stretches out, so that after the telescopic groove 13 returns to normal pressure, the locking block 15 can be driven to retract into the telescopic groove 13 under the action of the elasticity of the resetting of the first tension spring 18, the linkage structure is reset, the rotating shaft 4 can rotate relative to the hollow shaft 12, the motor 5 controls the rotating shaft 4 to reversely rotate, the rope 25 is released, the clamping plates 3 are mutually separated under the action of the elasticity of the spring 11 and the suction force of the clamping plate 9, the clamping plate 9 moves away from the clamping plate 3 under the action of the elasticity of the second tension spring 26, the air pressure in the clamping plate 9 is gradually increased until the clamping plate 9 and the workpiece 28 are separated, the clamping plate 3 is kept away from the workpiece 28 along with the clamping plate 3, and the spring 11 is reset to control the piston 7 to reset, and the stop valve 20 is closed at the moment, and the next use is waited.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a rotatory clamping device, includes workstation (1) and carousel (2) that rotate on workstation (1) and set up, its characterized in that: the turntable (2) is provided with clamping plates (3) which can be mutually close to or far away from each other along radial movement of the turntable (2), movement of the clamping plates (3) is controlled by a control structure, the control structure comprises a rotating shaft (4) which is arranged on a workbench (1) in a rotating way and is coaxial with the turntable (2), a motor (5) which drives the rotating shaft (4) to rotate, and a driving structure which is arranged between the rotating shaft (4) and the clamping plates (3) and is used for controlling the clamping plates (3) to mutually close to or far away from each other when the rotating shaft (4) positively and negatively rotates, elastic clamping adsorption structures which are used for clamping workpieces (28) when the clamping plates (3) are mutually close to each other or are separated from the workpieces (28) when the clamping plates (3) are mutually far away from each other are arranged between the clamping plates (3) and the rotating shaft (4), and a linkage structure which is used for controlling the synchronous rotation of the turntable (2) and the rotating shaft (4), and a switching structure which is used for controlling the linkage structure to reset.

2. A rotary gripping device according to claim 1, characterised in that: the elastic clamping adsorption structure comprises a gas storage channel (6) arranged in the clamping plate (3), a piston (7) arranged in the gas storage channel (6) in a sealing sliding manner along the moving direction of the clamping plate (3), a hollow hard tube (8) which is arranged on the piston (7) and penetrates through the clamping plate (3) and extends towards the direction close to a workpiece (28), a sucker (9) which is arranged at one end, far away from the piston (7), of the hollow hard tube (8) and is communicated with the hollow hard tube (8), a through hole (10) which is arranged in the gas storage channel (6) and is arranged on the hollow hard tube (8) and is used for enabling the gas storage channel (6) to be communicated with the hollow hard tube (8), and a spring (11) which is arranged between the sucker (9) and the clamping plate (3) along the moving direction of the clamping plate (3), wherein the sucker (9) is far away from the clamping plate (3) when the spring (11) is in an initial state.

3. A rotary gripping device according to claim 2, characterised in that: the linkage structure comprises a hollow shaft (12) which is rotatably arranged on the workbench (1) and is coaxially connected with the turntable (2) and can be used for a rotating shaft (4) to pass through, a telescopic groove (13) which is concavely arranged on the inner annular wall of the hollow shaft (12), a locking groove (14) which is concavely arranged on the outer annular wall of the rotating shaft (4), a locking block (15) which is alternately matched with the locking groove (14) or is accommodated in the telescopic groove (13) when the locking block is partially stretched out or retracted when the locking block is partially stretched out of the telescopic groove (13), and a stretching structure which is arranged between the telescopic groove (13) and the clamping plate (3) and is used for controlling the local stretching out of the locking block (15), wherein the stretching structure is controlled by the movement of the piston (7), and the retraction of the locking block (15) is controlled by the switching structure.

4. A rotary gripping device according to claim 3, characterised in that: the extending structure comprises an air storage chamber (16) which is arranged in the clamping plate (3) and is communicated with one end of the air storage channel (6) far away from the sucker (9), and an air hose (17) of which the two ends are respectively communicated with the air storage chamber (16) and the telescopic groove (13) in a sealing sliding manner, wherein the locking block (15) and the telescopic groove (13) are matched in a sealing sliding manner.

5. A rotary gripping device according to claim 4, characterised in that: the switching structure comprises a first tension spring (18) arranged in the expansion groove (13) along the moving direction of the locking block (15), a communicating pipe (19) arranged on the clamping plate (3) and used for enabling the air storage chamber (16) to be communicated with the outside, and a stop valve (20) arranged on the communicating pipe (19) and used for controlling the opening and closing of the communicating pipe (19), wherein the locking block (15) is contained in the expansion groove (13) when the first tension spring (18) is in an initial state.

6. A rotary gripping device according to claim 1, characterised in that: the driving structure comprises a guide structure arranged between the clamping plate (3) and the rotary table (2) and used for driving the clamping plate (3) to linearly move and a driving part arranged between the rotating shaft (4) and the clamping plate (3) and used for controlling the clamping plate (3) to mutually approach or separate from each other, and the driving part is controlled by the rotation of the rotating shaft (4).

7. A rotary gripping device according to claim 6, characterised in that: the guiding structure comprises a guiding block (21) arranged on the lower bottom surface of the clamping plate (3) and a guiding groove (22) which is arranged on the turntable (2) and used for guiding the guiding block (21) to be embedded into the guiding sliding.

8. A rotary gripping device according to claim 7, characterised in that: the drive part comprises a through groove (23) which is arranged in the turntable (2) along the radial direction of the turntable (2) and is used for enabling the two guide grooves (22) to be communicated and an avoidance groove (24) which is arranged on the turntable (2) concentrically with the turntable (2), one end of the rotating shaft (4) far away from the motor (5) penetrates through the avoidance groove (24) and then is positioned in the through groove (23), a rope (25) which is respectively connected with the two guide blocks (21) is arranged on the rotating shaft (4) in the through groove (23), a second tension spring (26) is arranged between the guide blocks (21) and the guide grooves (22) along the moving direction of the guide blocks (21), and when the second tension spring (26) is in an initial state, the clamping plate (3) is far away from the workpiece (28).

9. A rotary gripping device according to claim 7, characterised in that: the cross sections of the guide block (21) and the guide groove (22) are arranged in an inverted T shape or a dovetail shape.

10. A rotary gripping device according to claim 1, characterised in that: at least one group of elastic clamping and adsorbing structures are arranged on the clamping plate (3) at intervals.