CN214263941U - Chuck device - Google Patents

Abstract

The utility model discloses a chuck device, including the disk body and with the dish lid of disk body rigid coupling, the inside of disk body is equipped with the cylinder subassembly that a plurality of distributes along circumference, the disk body with the dish lid rigid coupling is formed with unlocking chamber and locking chamber, unlocking chamber with the locking chamber all through a plurality of gas pocket respectively with a plurality of cylinder subassembly one-to-one intercommunication, be equipped with on the dish lid respectively with unlocking chamber with first air inlet joint and the second air inlet joint of locking chamber intercommunication. This chuck device can reduce the processing degree of difficulty and the processing cost of product on guaranteeing the basis of circulation of qi between dish lid, disk body and the cylinder subassembly as required, is favorable to the popularization of product.

Description

Chuck device

Technical Field

The utility model relates to a mechanical assembly technical field, in particular to chuck device.

Background

The chuck is a device for clamping a workpiece on a machine tool, at present, the workpiece is mainly clamped by a three-jaw or four-jaw chuck on the machine tool, and the chuck needs to give a proper clamping force for clamping the workpiece. In the prior art, the chuck device comprises a clamping jaw, a piston cylinder and a chuck body, wherein in order to ensure the communication between the chuck body and the piston cylinder and to realize clamping operation by driving the clamping jaw to move through the piston cylinder, small deep holes need to be processed inside the chuck body, as shown in fig. 1, two small deep holes 01 are processed in the chuck body and are communicated with each other, and the small deep holes 01 are communicated with a cavity of the piston cylinder to realize air circulation, so that the clamping jaw is driven to move through the movement of the piston. However, the operation of processing tiny deep holes in the disc body is difficult to process and high in cost.

Therefore, how to avoid the problems of high processing difficulty and high cost caused by processing fine deep holes in the tray body is a technical problem to be solved by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a chuck device can realize locking and unblock to the work piece to can reduce the processing degree of difficulty and manufacturing cost.

In order to achieve the above object, the utility model provides a chuck device, including the disk body and with the cover of disk body rigid coupling, the inside of disk body is equipped with the cylinder subassembly that a plurality of distributes along circumference, the disk body with the cover rigid coupling is formed with unlocking chamber and locking chamber, unlocking chamber with the locking chamber all through a plurality of gas pocket respectively with a plurality of cylinder subassembly one-to-one intercommunication, be equipped with on the cover respectively with unlocking chamber with first air inlet joint and the second air inlet joint of locking chamber intercommunication.

Optionally, the plate cover is provided with a first step surface, the plate body is provided with a second step surface matched with the first step surface, the first step surface is provided with a first annular groove and a second annular groove, and the first annular groove and the second annular groove are in contact fit to enable the first annular groove and the second annular groove to form the unlocking cavity and the locking cavity respectively.

Optionally, the disc cover is provided with a first step surface, the disc body is provided with a second step surface matched with the first step surface, the first step surface is provided with a first annular groove and a second annular groove, a first sealing ring, a second sealing ring and a third sealing ring are arranged between the disc cover and the disc body, the first annular groove is located between the first sealing ring and the second sealing ring, and the second annular groove is located between the second sealing ring and the third sealing ring;

when the tray cover is fixedly connected with the tray body, the first annular groove and a first gap between the first sealing ring and the second sealing ring form the unlocking cavity, and the second annular groove and a second gap between the second sealing ring and the third sealing ring form the locking cavity.

Optionally, the second step surface is provided with three mounting grooves for correspondingly mounting the first seal ring, the second seal ring and the third seal ring respectively.

Optionally, the first air inlet joint and the second air inlet joint are arranged in the center of the disc cover, and the first air inlet joint and the second air inlet joint are parallel to each other.

Optionally, the number of the cylinder barrel assemblies is three, a group of cylinders is arranged in any one of the cylinder barrel assemblies, and an unlocking mechanism used for releasing the workpiece through pneumatic or manual unlocking when the first air inlet joint falls is selected from one of the three groups of cylinders.

Optionally, the unlocking mechanism is specifically a pneumatic unlocking mechanism, the pneumatic unlocking mechanism comprises a plug head, an unlocking piston and an unlocking air inlet connector, and the unlocking air inlet connector is connected to an external air source to push the unlocking piston to extrude the plug head to move.

Optionally, a second elastic element is arranged on one side, away from the unlocking piston, of the plug head, and the second elastic element provides elastic force, capable of moving in a direction close to the unlocking air inlet joint, for the plug head.

Optionally, the unlocking air inlet joint is connected with an unlocking plug for limiting the unlocking piston to move in the direction close to the unlocking air inlet joint, and the axial direction of the unlocking plug is provided with a vent hole for allowing gas entering through the unlocking air inlet joint to flow.

Optionally, the unlocking piston is specifically a T-shaped structure, and an unlocking end cover used for abutting against the unlocking piston when the unlocking piston moves to a preset position along a direction away from the unlocking air inlet joint is sleeved outside the unlocking piston.

Compared with the prior art, the embodiment of the utility model provides a chuck device, including disk body and cover, wherein, cover and disk body rigid coupling, the inside of disk body is equipped with the cylinder subassembly that a plurality of distributes along circumference, be formed with unblock chamber and locking chamber through the two rigid couplings of disk body and cover, unblock chamber through a plurality of gas pocket respectively with a plurality of cylinder subassembly one-to-one intercommunication, the locking chamber through a plurality of gas pocket respectively with a plurality of cylinder subassembly one-to-one intercommunication, in addition, be equipped with first air connector and second air connector on the cover, first air connector and second air connector respectively with unblock chamber and locking chamber intercommunication. Therefore, compared with the mode that tiny deep holes are processed in the disc body to realize air circulation in the prior art, the chuck device provided by the embodiment of the utility model has the advantages that one path of compressed air can enter the unlocking cavity from the first air inlet joint on the disc cover and then enters the cylinder barrel assembly through the air hole communicated with the unlocking cavity; the other path of compressed air can enter the locking cavity from a second air inlet joint on the disc cover and then enters the cylinder barrel assembly through the air hole communicated with the locking cavity. This mode of setting up of circulation of gas can be on the basis of guaranteeing the circulation of gas between dish lid, disk body and the cylinder subassembly as required, reduces the processing degree of difficulty and the processing cost of product, is favorable to the popularization of product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a prior art method for machining a long and thin deep hole in a disc body;

fig. 2 is a schematic cross-sectional view illustrating an assembly of a cover and a body in the chuck device according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of portion C of FIG. 2;

fig. 4 is a top view of a tray body of the chuck device according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a chuck device according to an embodiment of the present invention in a release state;

fig. 6 is a schematic structural view of a chuck device according to an embodiment of the present invention in a clamping state;

fig. 7 is a schematic structural view of a drive plate in the chuck device according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a jaw groove in the chuck device according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a clamping jaw in the chuck device according to the embodiment of the present invention;

fig. 10 is a side view of fig. 9.

Wherein:

01-deep hole;

1-disc cover, 10-first step surface, 101-first annular groove, 102-second annular groove, 11-first air inlet joint and 12-second air inlet joint;

2-disc body, 20-second step surface, 201-first sealing ring, 202-second sealing ring, 203-third sealing ring, 21-cylinder component, 2111-first elastic component, 2112-piston, 2113-plug, 2121-second elastic component, 2122-plug, 2123-unlocking end cover, 2124-unlocking piston, 2125-unlocking plug, 2126-unlocking air inlet joint, 22-dial plate, 221-dial plate claw, 222-kidney groove, 23-clamping claw groove, 24-clamping claw and 241-clamping claw shaft;

3-unlocking chamber, 31-first air hole;

4-locking cavity, 41-second air hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a chuck device can realize locking and unblock to the work piece to can reduce the processing degree of difficulty and manufacturing cost.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

It should be noted that the following directional terms such as "upper end, lower end, left side, right side" and the like are defined based on the drawings of the specification.

Referring to fig. 2-10, fig. 2 is a schematic cross-sectional view illustrating an assembly of a cover and a tray body of a chuck device according to an embodiment of the present invention; FIG. 3 is an enlarged schematic view of portion C of FIG. 2; fig. 4 is a top view of a tray body of the chuck device according to an embodiment of the present invention; fig. 5 is a schematic structural view of a chuck device according to an embodiment of the present invention in a release state; fig. 6 is a schematic structural view of a chuck device according to an embodiment of the present invention in a clamping state; fig. 7 is a schematic structural view of a drive plate in the chuck device according to an embodiment of the present invention; fig. 8 is a schematic structural view of a jaw groove in the chuck device according to an embodiment of the present invention; fig. 9 is a schematic structural view of a clamping jaw in the chuck device according to the embodiment of the present invention; fig. 10 is a side view of fig. 9.

The embodiment of the utility model provides a chuck device, including lid 1 and disk body 2, wherein, lid 1 and 2 rigid couplings of disk body, the inside of disk body 2 is equipped with the cylinder subassembly 21 that a plurality of distributes along circumference.

In addition, three clamping jaw grooves 23 are uniformly distributed in the disc body 2 along the circumferential direction, a clamping jaw 24 is correspondingly arranged in any clamping jaw groove 23, and the clamping jaw 24 can slide in the clamping jaw groove 23; the middle part in the disc body 2 is also provided with a dial plate 22, the dial plate 22 is internally provided with three kidney-shaped grooves 222 which are uniformly distributed along the circumferential direction and three dial plate claws 221 which are protruded outwards along the radial direction, and the three dial plate claws 221 are respectively matched and connected with the three cylinder barrel components 21 so as to drive the dial plate 22 to rotate through the cylinder barrel components 21; the three jaw shafts 241 are fitted into the three kidney grooves 222, respectively.

Specifically, any kidney slot 222 has a station a and a station B, wherein when the dial 22 is driven by the cylinder assembly 21 to rotate counterclockwise (or clockwise), the dial 22 pulls the clamping jaws 24 back to the station a through the clamping jaw shafts 241, at which time the three clamping jaws 24 are completely retracted into the clamping jaw slots 23, and at which time the chuck device is in an unlocked state, and a workpiece can be placed; after the workpiece is placed, when the dial 22 is driven by the cylinder assembly 21 to rotate clockwise (or counterclockwise), the dial 22 pushes the jaws 24 out to the station B through the jaw shaft 241, and at this time, the three jaws 24 extend out of the jaw grooves 23 to lock the workpiece.

In order to realize that the gas of dish lid 1 to cylinder subassembly 21 switches on, be formed with unblock chamber 3 and locking chamber 4 through the two rigid coupling of disk body 2 and dish lid 1, unblock chamber 3 communicates with a plurality of cylinder subassembly 21 one-to-one through a plurality of gas pocket respectively, locking chamber 4 communicates with a plurality of cylinder subassembly 21 one-to-one through a plurality of gas pocket respectively, in addition, be equipped with first air inlet joint 11 and second air inlet joint 12 on the dish lid 1, first air inlet joint 11 and second air inlet joint 12 communicate with unblock chamber 3 and locking chamber 4 respectively, in order to improve the stability and the homogeneity that dish lid 1 was intake, first air inlet joint 11 and second air inlet joint 12 locate the central authorities of dish lid 1, and first air inlet joint 11 and second air inlet joint 12 are parallel to each other.

Therefore, in the chuck device provided by the embodiment of the present invention, one path of compressed air can enter the unlocking chamber 3 from the first air inlet joint 11 on the disk cover 1, and then enter the cylinder assembly 21 through the air hole communicated with the unlocking chamber 3, so as to drive the driving plate 22 to rotate counterclockwise, so that the three clamping jaws 24 completely return to the clamping jaw groove 23; the other path of compressed air can enter the locking cavity 4 from the second air inlet joint 12 on the disk cover 1 and then enters the cylinder barrel assembly 21 through the air hole communicated with the locking cavity 4, so that the purpose of driving the dial plate 22 to rotate clockwise to enable the three clamping jaws 24 to extend out of the clamping jaw groove 23 to lock the workpiece is achieved.

Compare in prior art through the mode of processing tiny deep hole in order to realize the circulation of air in disk body 2, this circulation of air's mode of setting up can reduce the processing degree of difficulty and the processing cost of product on guaranteeing the basis of circulation of air between cover 1, disk body 2 and the cylinder subassembly 21 as required, is favorable to the popularization of product.

As an embodiment, the disk cover 1 is provided with a first step surface 10, the disk body 2 is provided with a second step surface 20 matched with the first step surface 10, the first step surface 10 is provided with a first annular groove 101 and a second annular groove 102, and the first annular groove 101 and the second annular groove 102 are respectively formed into the unlocking cavity 3 and the locking cavity 4 by the contact and matching of the first step surface 10 and the second step surface 20. Specifically, after the assembly is completed, the first step surface 10 is located below the second step surface 20, and the two annular grooves are located below the second step surface 20, and at this time, the second step surface 20 can block the upper end openings of the two annular grooves, so that the first annular groove 101 and the second annular groove 102 both become closed grooves, and the gas flows conveniently.

As another embodiment, the disk cover 1 is provided with a first step surface 10, the disk body 2 is provided with a second step surface 20 matched with the first step surface 10, the first step surface 10 is provided with a first annular groove 101 and a second annular groove 102, a first sealing ring 201, a second sealing ring 202 and a third sealing ring 203 are arranged between the disk cover 1 and the disk body 2, the first annular groove 101 is positioned between the first sealing ring 201 and the second sealing ring 202, and the second annular groove 102 is positioned between the second sealing ring 202 and the third sealing ring 203; thus, when the disk cover 1 is fixedly connected to the disk body 2, the first annular groove 101 and a first gap between the first seal ring 201 and the second seal ring 202 form the unlock chamber 3, and the second annular groove 102 and a second gap between the second seal ring 202 and the third seal ring 203 form the lock chamber 4.

In the above embodiment, the unlocking chamber 3 and the locking chamber 4 are both combined chambers, the unlocking chamber 3 includes the first annular groove 101 and a first gap between the first seal ring 201 and the second seal ring 202, and the locking chamber 4 includes the second annular groove 102 and a second gap between the second seal ring 202 and the third seal ring 203.

According to actual needs, the first seal ring 201, the second seal ring 202 and the third seal ring 203 can be mounted on the disc bottom, that is, the second step surface 20 is provided with three mounting grooves for mounting the first seal ring 201, the second seal ring 202 and the third seal ring 203 respectively. Of course, the first annular groove 101 and the second annular groove 102 may also be provided on the disc body 2, and accordingly, the first seal ring 201, the second seal ring 202, and the third seal ring 203 may be mounted on the disc cover 1.

Preferably, the number of the cylinder assemblies 21 is three corresponding to the three-jaw chuck, the three cylinder assemblies 21 are arranged around the drive plate 22, a group of cylinders is arranged in any cylinder assembly 21, wherein the first group and the second group of cylinders are respectively provided with a first elastic member 2111, a piston 2112, a plug 2113 and a plurality of seals, and the first elastic member 2111 is arranged at the tail end of the cylinder; the third group of cylinders is provided with an unlocking mechanism, the unlocking mechanism comprises a second elastic member 2121, a plug head 2122 (piston), an unlocking end cover 2123, an unlocking piston 2124, an unlocking plug head 2125, an unlocking air inlet joint 2126 and a plurality of seals, and the second elastic member 2121 is arranged at the tail end of the cylinder. The driving plate 22 is driven to rotate by the movement of the pistons 2112 of the first group and the second group of cylinders and the plugs 2122 of the third group of cylinders, and the elastic element can be specifically set as a compression spring.

On the basis of the above, the chuck apparatus has three states, i.e., a normal state, a clamped state, and a released state. Wherein:

in a normal state: the plug 2122 and the two pistons 2112 are driven by respective spring forces to rotate the dial 22 to eject the clamping jaws 24, as shown in fig. 6;

a clamping state: the side of the plug head 2122 close to the spring and the side of any piston 2112 close to the spring are charged, and the plug head 2122 and the piston 2112 are pushed by the spring force and the air pressure to rotate the dial 22 to push the clamping jaws 24 out of the clamping jaw groove 23, so that the workpiece is clamped, as shown in fig. 6;

and (3) releasing state: when the side of the plug 2122 away from the spring and the side of any piston 2112 away from the spring are charged, the air pressure of the third set of cylinders overcomes the spring force to push the plug 2122 to move in the reverse direction, the air pressure of the first and second sets of cylinders overcomes the spring force to push the piston 2112 to move in the reverse direction, and the dial 22 is rotated to retract the jaws 24, thereby releasing the workpiece, as shown in fig. 5.

It should be noted that an unlocking mechanism is provided in one of the three groups of cylinders, so that when the first air inlet joint 11 falls, the unlocking mechanism can be used for realizing pneumatic or manual unlocking, thereby achieving the purpose of releasing the workpiece.

Specifically, the unlocking mechanism may be specifically configured as a pneumatic unlocking mechanism, and the pneumatic unlocking mechanism includes a plug 2122, an unlocking piston 2124 and an unlocking air inlet joint 2126, and an external air source is connected through the unlocking air inlet joint 2126 to push the unlocking piston 2124 to press the plug 2122, and the movement process of the plug 2122 is the same as the movement process of the pistons 2112 in the first group and the second group of cylinders.

Meanwhile, a side of the plug 2122 away from the unlocking piston 2124 is provided with a second elastic member 2121, the second elastic member 2121 is generally configured as a compression spring, and the second elastic member 2121 provides an elastic force to the plug 2122, which is movable in a direction approaching the unlocking air inlet joint 2126.

When unlocking is required, the plug head 2122 is pressed by the unlocking piston 2124 to contract the compression spring, the plug head 2122 moves towards the tail end of the air cylinder, the dial 22 is rotated, and the dial 22 pulls the clamping jaws 24 back to the position A of the kidney-shaped groove 222 of the dial 22 through the clamping jaw shaft 241, so that pneumatic unlocking is realized.

In order to ensure the stability of the movement of the plug head 2122, the unlocking inlet 2126 is connected to an unlocking plug 2125 for limiting the unlocking piston 2124 to move in a direction close to the unlocking inlet 2126, and a vent hole for allowing the gas entering through the unlocking inlet 2126 to flow is axially formed in the unlocking plug 2125; the unlocking piston 2124 is specifically of a T-shaped structure, an unlocking end cover 2123 is sleeved outside the unlocking piston 2124, and when the unlocking piston 2124 moves to a preset position along a direction away from the unlocking air inlet connector 2126, the unlocking end cover 2123 is used for contacting and abutting against the unlocking piston 2124, so that the purpose of limiting is achieved.

After the chuck is installed, the air inlet and outlet holes are usually positioned in the equipment, and when the first air inlet joint 11 accidentally falls off so that the chuck cannot be unlocked normally (at the moment, a workpiece cannot be taken down to affect maintenance), compressed air can be introduced into the unlocking air inlet joint 2126 through the unlocking mechanism, so that the workpiece can be released; when the compressed air is abnormal, the unlocking air inlet joint 2126 can be directly removed, and the unlocking piston 2124 is pushed by a screwdriver to release the workpiece.

The operating principle of the chuck device is as follows:

during normal operation, compressed air enters the unlocking cavity 3 from the first air inlet joint 11 on the disc cover 1, and then enters the cavities of the three groups of cylinders through the three first air holes 31 of the unlocking cavity 3 respectively to push the pistons 2112 and the plugs 2122 to move against the spring force so as to rotate the dial 22, the dial 22 pulls the clamping jaws 24 back to the station a of the kidney-shaped groove 222 of the dial 22 through the clamping jaw shaft 241, at the moment, the three clamping jaws 24 are completely retracted into the clamping jaw grooves 23, and a workpiece can be placed in the clamping jaw grooves, as shown in fig. 5; after a workpiece is placed, the first air inlet joint 11 is decompressed, the second air inlet joint 12 is used for air inlet, the air enters the cavities of the three groups of cylinders through the second air holes 41 of the locking cavity 4 respectively, the pistons 2112 and the plug heads 2122 are pushed together with the spring force to move in the opposite directions, the dial 22 is rotated when the pistons 2112 move, the dial 22 pushes the clamping jaws 24 out to a station B of the kidney-shaped groove 222 of the dial 22 through the clamping jaw shaft 241, and at the moment, the three clamping jaws 24 extend out of the clamping jaw grooves 23 to lock the workpiece, as shown in FIG. 6; when the air pipe of the first air inlet joint 11 of the disc cover 1 falls off, the workpiece cannot be taken down at this time, compressed air is introduced into the unlocking air inlet joint 2126 to push the unlocking piston 2124 to move, the unlocking piston 2124 pushes the plug head 2122 to move against the spring force to rotate the dial plate 22, the dial plate 22 pulls the clamping jaws 24 back to the station a of the kidney-shaped groove 222 of the dial plate 22 through the clamping jaw shafts 241, so that pneumatic unlocking is realized, and when the compressed air is abnormal, the unlocking air inlet joint 2126 can be directly taken down to push the unlocking piston 2124 by a screwdriver to release the workpiece.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The chuck device provided by the utility model is described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the solution and its core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The utility model provides a chuck device, its characterized in that, including disk body (2) and with cover (1) of disk body (2) rigid coupling, the inside of disk body (2) is equipped with cylinder subassembly (21) that a plurality of distributes along circumference, disk body (2) with cover (1) rigid coupling is formed with unblock chamber (3) and locking chamber (4), unblock chamber (3) with locking chamber (4) all through a plurality of gas pocket respectively with a plurality of cylinder subassembly (21) one-to-one intercommunication, be equipped with on cover (1) respectively with unblock chamber (3) with first air inlet joint (11) and second air inlet joint (12) of locking chamber (4) intercommunication.

2. The chuck device according to claim 1, wherein the disk cover (1) is provided with a first stepped surface (10), the disk body (2) is provided with a second stepped surface (20) which is matched with the first stepped surface (10), the first stepped surface (10) is provided with a first annular groove (101) and a second annular groove (102), and the first annular groove (101) and the second annular groove (102) are respectively formed into the unlocking cavity (3) and the locking cavity (4) through the contact and matching of the first stepped surface (10) and the second stepped surface (20).

3. The chuck device according to claim 1, wherein the disk cover (1) is provided with a first stepped surface (10), the disk body (2) is provided with a second stepped surface (20) which is matched with the first stepped surface (10), the first stepped surface (10) is provided with a first annular groove (101) and a second annular groove (102), a first sealing ring (201), a second sealing ring (202) and a third sealing ring (203) are arranged between the disk cover (1) and the disk body (2), the first annular groove (101) is positioned between the first sealing ring (201) and the second sealing ring (202), and the second annular groove (102) is positioned between the second sealing ring (202) and the third sealing ring (203);

when the disc cover (1) is fixedly connected with the disc body (2), the first annular groove (101) and a first gap between the first sealing ring (201) and the second sealing ring (202) form the unlocking cavity (3), and the second annular groove (102) and a second gap between the second sealing ring (202) and the third sealing ring (203) form the locking cavity (4).

4. The chuck device according to claim 3, wherein the second step surface (20) is provided with three mounting grooves for mounting the first seal ring (201), the second seal ring (202) and the third seal ring (203), respectively.

5. The chuck device according to claim 1, wherein the first air inlet joint (11) and the second air inlet joint (12) are provided at the center of the disk cover (1), and the first air inlet joint (11) and the second air inlet joint (12) are parallel to each other.

6. The chuck device according to any one of claims 1 to 5, wherein the number of said cylinder assemblies (21) is three, and a set of cylinders is provided in each of said cylinder assemblies (21), and one of said three sets of cylinders is provided with an unlocking mechanism for releasing the workpiece by pneumatic or manual unlocking when said first air inlet joint (11) is dropped.

7. The chuck device according to claim 6, wherein the unlocking mechanism is a pneumatic unlocking mechanism, and the pneumatic unlocking mechanism comprises a plug head (2122), an unlocking piston (2124) and an unlocking air inlet connector (2126), and an external air source is connected through the unlocking air inlet connector (2126) to push the unlocking piston (2124) to press the plug head (2122) to act.

8. The chuck assembly as in claim 7, wherein a side of the stopper (2122) remote from the unlocking piston (2124) is provided with a second resilient member (2121), the second resilient member (2121) providing the stopper (2122) with a resilient force movable in a direction approaching the unlocking gas feed connector (2126).

9. The chuck assembly according to claim 8, wherein the unlocking air inlet joint (2126) is connected with an unlocking plug (2125) for limiting the movement of the unlocking piston (2124) in a direction close to the unlocking air inlet joint (2126), and the unlocking plug (2125) is provided with a vent hole in an axial direction for allowing the flow of air entering through the unlocking air inlet joint (2126).

10. The chuck assembly according to claim 9, wherein the unlocking piston (2124) is a T-shaped structure, and the unlocking piston (2124) is externally sleeved with an unlocking end cap (2123) for contacting against the unlocking piston (2124) when the unlocking piston (2124) moves to a predetermined position in a direction away from the unlocking air inlet joint (2126).

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