A chuck device

Abstract

The present invention discloses a chuck device, comprising a chuck body and a chuck cover fixedly connected to the chuck body, wherein a plurality of cylinder assemblies distributed along the circumferential direction are arranged inside the chuck body, wherein the chuck body and the chuck cover are fixedly connected to form an unlocking cavity and a locking cavity, wherein the unlocking cavity and the locking cavity are respectively connected to a plurality of cylinder assemblies through a plurality of air holes, and wherein a first air inlet joint and a second air inlet joint respectively connected to the unlocking cavity and the locking cavity are arranged on the chuck cover. The chuck device can reduce the processing difficulty and processing cost of the product on the basis of ensuring the air flow between the chuck cover, the chuck body and the cylinder assembly as required, and is conducive to the promotion of the product.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical assembly, and in particular to a chuck device. Background Art

[0002] A chuck is a device used to clamp workpieces on machine tools. Currently, three-jaw or four-jaw chucks are mainly used to clamp workpieces on machine tools. In order to clamp the workpiece, the chuck needs to be given a suitable clamping force. In the prior art, the chuck device includes a clamping jaw, a piston cylinder and a plate body. In order to ensure the connection between the plate body and the piston cylinder body, so that the clamping jaws can be driven by the piston cylinder body to realize the clamping operation, it is necessary to process a small deep hole inside the plate body, such as Figure 1 As shown, two small deep holes 01 are processed in the disc body, and the two small deep holes 01 are connected to each other. The small deep holes 01 are connected to the chamber of the piston cylinder body to achieve air flow, thereby driving the clamping jaws to move through the movement of the piston. However, the operation of processing small deep holes inside the disc body is difficult and costly.

[0003] Therefore, how to avoid the difficulty and high cost of machining small deep holes inside the disc body is a technical problem that technical personnel in this field need to solve at present. Summary of the invention

[0004] The object of the present invention is to provide a chuck device which can realize locking and unlocking of a workpiece and can reduce the processing difficulty and production cost.

[0005] To achieve the above-mentioned purpose, the present invention provides a chuck device, including a disc body and a disc cover fixedly connected to the disc body, the interior of the disc body is provided with a plurality of cylinder assemblies distributed along the circumferential direction, the disc body and the disc cover are fixedly connected to form an unlocking cavity and a locking cavity, the unlocking cavity and the locking cavity are respectively connected to a plurality of the cylinder assemblies through a plurality of air holes, and the disc cover is provided with a first air inlet connector and a second air inlet connector respectively connected to the unlocking cavity and the locking cavity.

[0006] Optionally, the disk cover is provided with a first step surface, the disk body is provided with a second step surface matching with the first step surface, the first step surface is provided with a first annular groove and a second annular groove, and the first step surface and the second step surface are contacted and matched so that the first annular groove and the second annular groove respectively form the unlocking cavity and the locking cavity.

[0007] Optionally, the disc cover is provided with a first stepped surface, the disc body is provided with a second stepped surface matched with the first stepped surface, the first stepped 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 provided 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;

[0008] When the disk cover is fixedly connected to the disk body, the first annular groove and the first gap between the first sealing ring and the second sealing ring form the unlocking cavity, and the second annular groove and the second gap between the second sealing ring and the third sealing ring form the locking cavity.

[0009] Optionally, the second step surface is provided with three installation grooves corresponding to the installation of the first sealing ring, the second sealing ring and the third sealing ring respectively.

[0010] Optionally, the first air inlet connector and the second air inlet connector are arranged at the center of the disk cover, and the first air inlet connector and the second air inlet connector are parallel to each other.

[0011] Optionally, the number of the cylinder assemblies is three, and a group of cylinders is installed in any one of the cylinder assemblies. One of the three groups of cylinders is provided with an unlocking mechanism for releasing the workpiece by pneumatic or manual unlocking when the first air inlet connector falls off.

[0012] Optionally, the unlocking mechanism is specifically a pneumatic unlocking mechanism, which includes a plug, an unlocking piston and an unlocking air inlet connector, and is connected to an external air source through the unlocking air inlet connector to push the unlocking piston to squeeze the plug.

[0013] Optionally, a second elastic member is provided on a side of the plug away from the unlocking piston, and the second elastic member provides an elastic force to the plug to enable the plug to move in a direction approaching the unlocking air inlet connector.

[0014] Optionally, the unlocking air inlet connector is connected to an unlocking plug for limiting the unlocking piston from moving in a direction close to the unlocking air inlet connector, and the unlocking plug is axially provided with a vent hole for the flow of gas entering through the unlocking air inlet connector.

[0015] Optionally, the unlocking piston is specifically a T-shaped structure, and the outer sleeve of the unlocking piston is provided with an unlocking end cover for contacting and abutting against the unlocking piston when the unlocking piston moves to a preset position in a direction away from the unlocking air inlet connector.

[0016] With respect to the above background technology, the chuck device provided by the embodiment of the present invention includes a disc body and a disc cover, wherein the disc cover is fixedly connected to the disc body, and a plurality of cylinder assemblies distributed along the circumferential direction are arranged inside the disc body, and an unlocking chamber and a locking chamber are formed by fixing the disc body and the disc cover, and the unlocking chamber is connected to a plurality of cylinder assemblies one by one through a plurality of air holes, and the locking chamber is connected to a plurality of cylinder assemblies one by one through a plurality of air holes, and in addition, a first air inlet joint and a second air inlet joint are arranged on the disc cover, and the first air inlet joint and the second air inlet joint are connected to the unlocking chamber and the locking chamber respectively. In this way, compared with the method of machining fine deep holes in the disc body to realize air circulation in the prior art, in the chuck device provided by the embodiment of the present invention, one path of compressed air can enter the unlocking chamber from the first air inlet joint on the disc cover, and then enter the cylinder assembly through the air hole connected to the unlocking chamber; another path of compressed air can enter the locking chamber from the second air inlet joint on the disc cover, and then enter the cylinder assembly through the air hole connected to the locking chamber. The air flow arrangement can reduce the processing difficulty and processing cost of the product on the basis of ensuring the air flow between the disc cover, the disc body and the cylinder assembly as needed, which is conducive to the promotion of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of processing a long and thin deep hole in a plate body in the prior art;

[0019] Figure 2 A schematic cross-sectional structure diagram of the assembly of a disk cover and a disk body in a chuck device provided by an embodiment of the present invention;

[0020] Figure 3 for Figure 2 A magnified schematic diagram of part C;

[0021] Figure 4 A top view of a disc body in a chuck device provided by an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the structure of a chuck device in a released state provided by an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of the structure of a chuck device in a clamping state provided by an embodiment of the present invention;

[0024] Figure 7A schematic diagram of the structure of a dial in a chuck device provided in an embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the structure of a clamping claw groove in a chuck device provided in an embodiment of the present invention;

[0026] Fig. 9 A schematic diagram of the structure of the clamping jaws in the chuck device provided by an embodiment of the present invention;

[0027] Fig.10 for Fig. 9 Side view of.

[0028] in:

[0029] 01-Deep hole;

[0030] 1-disc cover, 10-first step surface, 101-first annular groove, 102-second annular groove, 11-first air inlet connector, 12-second air inlet connector;

[0031] 2-disc body, 20-second step surface, 201-first sealing ring, 202-second sealing ring, 203-third sealing ring, 21-cylinder assembly, 2111-first elastic member, 2112-piston, 2113-plug, 2121-second elastic member, 2122-plug, 2123-unlocking end cover, 2124-unlocking piston, 2125-unlocking plug, 2126-unlocking air intake connector, 22-dial, 221-dial claw, 222-waist-shaped groove, 23-claw groove, 24-claw, 241-claw shaft;

[0032] 3-unlocking chamber, 31-first air hole;

[0033] 4-locking chamber, 41-second air hole. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The core of the present invention is to provide a chuck device that can lock and unlock a workpiece and reduce processing difficulty and production cost.

[0036] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] It should be noted that the directional words such as "upper end, lower end, left side, right side" described below are all defined based on the drawings in the specification.

[0038] Please refer to Figure 2-Figure 10 , Figure 2 A schematic cross-sectional structure diagram of the assembly of a disk cover and a disk body in a chuck device provided by an embodiment of the present invention; Figure 3 for Figure 2 A magnified schematic diagram of part C; Figure 4 A top view of a disc body in a chuck device provided by an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a chuck device in a released state provided by an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a chuck device in a clamping state provided by an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a dial in a chuck device provided in an embodiment of the present invention; Figure 8 A schematic diagram of the structure of a clamping claw groove in a chuck device provided in an embodiment of the present invention; Fig. 9 A schematic diagram of the structure of the clamping jaws in the chuck device provided by an embodiment of the present invention; Fig.10 for Fig. 9 Side view of.

[0039] The chuck device provided in the embodiment of the present invention comprises a chuck cover 1 and a chuck body 2, wherein the chuck cover 1 is fixedly connected to the chuck body 2, and a plurality of cylinder assemblies 21 distributed along the circumferential direction are arranged inside the chuck body 2.

[0040] In addition, three clamping grooves 23 are evenly distributed along the circumferential direction in the disc body 2, and a clamping claw 24 is correspondingly provided in each clamping groove 23, and the clamping claw 24 can slide in the clamping claw groove 23; a dial 22 is also provided in the middle part of the disc body 2, and the dial 22 is provided with three waist-shaped grooves 222 evenly distributed along the circumferential direction and three dial claws 221 protruding radially outward, and the three dial claws 221 are respectively connected with the three cylinder assemblies 21 to realize the rotation of the dial 22 through the cylinder assembly 21; the three clamping claw shafts 241 are respectively embedded in the three waist-shaped grooves 222.

[0041] Specifically, any waist-shaped groove 222 has a workstation A and a workstation B, wherein, when the dial 22 rotates counterclockwise (or clockwise) under the drive of the cylinder assembly 21, the dial 22 pulls the jaw 24 back to the workstation A through the jaw shaft 241, and at this time, the three jaws 24 are completely retracted into the jaw groove 23. At this time, the chuck device is in an unlocked state and the workpiece can be placed; after the workpiece is placed, when the dial 22 rotates clockwise (or counterclockwise) under the drive of the cylinder assembly 21, the dial 22 pushes the jaw 24 to the workstation B through the jaw shaft 241, and at this time, the three jaws 24 extend out of the jaw groove 23 to lock the workpiece.

[0042] In order to realize air conduction from the disk cover 1 to the cylinder assembly 21, an unlocking chamber 3 and a locking chamber 4 are formed by fixing the disk body 2 and the disk cover 1. The unlocking chamber 3 is connected to a plurality of cylinder assemblies 21 one by one through a plurality of air holes, and the locking chamber 4 is connected to a plurality of cylinder assemblies 21 one by one through a plurality of air holes. In addition, a first air inlet connector 11 and a second air inlet connector 12 are provided on the disk cover 1, and the first air inlet connector 11 and the second air inlet connector 12 are connected to the unlocking chamber 3 and the locking chamber 4 respectively. In order to improve the stability and uniformity of the air intake of the disk cover 1, the first air inlet connector 11 and the second air inlet connector 12 are arranged at the center of the disk cover 1, and the first air inlet connector 11 and the second air inlet connector 12 are parallel to each other.

[0043] In this way, 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 connector 11 on the disc cover 1, and then enter the cylinder assembly 21 through the air hole connected to the unlocking chamber 3, so as to achieve the purpose of driving the dial 22 to rotate counterclockwise so that the three jaws 24 are completely retracted into the jaw groove 23; another path of compressed air can enter the locking chamber 4 from the second air inlet connector 12 on the disc cover 1, and then enter the cylinder assembly 21 through the air hole connected to the locking chamber 4, so as to achieve the purpose of driving the dial 22 to rotate clockwise so that the three jaws 24 extend out of the jaw groove 23 to lock the workpiece.

[0044] Compared with the prior art method of achieving air circulation by machining small deep holes in the disc body 2, this air circulation setting method can reduce the processing difficulty and processing cost of the product on the basis of ensuring air circulation between the disc cover 1, the disc body 2 and the cylinder assembly 21 as needed, which is conducive to the promotion of the product.

[0045] 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 step surface 10 and the second step surface 20 are contacted and matched to form the unlocking cavity 3 and the locking cavity 4 of the first annular groove 101 and the second annular groove 102 respectively. 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 both located below the second step surface 20. 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 become closed grooves for gas circulation.

[0046] 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 matching 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 provided between the disk cover 1 and the disk body 2, the first annular groove 101 is located between the first sealing ring 201 and the second sealing ring 202, and the second annular groove 102 is located between the second sealing ring 202 and the third sealing ring 203; in this way, when the disk cover 1 is fixedly connected to the disk body 2, the first annular groove 101 and the first gap between the first sealing ring 201 and the second sealing ring 202 form an unlocking cavity 3, and the second annular groove 102 and the second gap between the second sealing ring 202 and the third sealing ring 203 form a locking cavity 4.

[0047] In the above embodiment, the unlocking chamber 3 and the locking chamber 4 are both combined chambers, the unlocking chamber 3 includes a first annular groove 101 and a first gap between the first sealing ring 201 and the second sealing ring 202, and the locking chamber 4 includes a second annular groove 102 and a second gap between the second sealing ring 202 and the third sealing ring 203.

[0048] According to actual needs, the first sealing ring 201, the second sealing ring 202 and the third sealing ring 203 can all be installed on the bottom of the dish, that is, the second stepped surface 20 is provided with three installation grooves corresponding to the installation of the first sealing ring 201, the second sealing ring 202 and the third sealing ring 203. Of course, the first annular groove 101 and the second annular groove 102 can also be provided on the dish body 2, and accordingly, the first sealing ring 201, the second sealing ring 202 and the third sealing ring 203 can all be installed on the dish cover 1.

[0049] Preferably, corresponding to the three-jaw chuck, the number of the above-mentioned cylinder assemblies 21 is set to three, and the three cylinder assemblies 21 are arranged around the dial 22. A group of cylinders is installed in any cylinder assembly 21, wherein the first group and the second group of cylinders are each 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 end of the cylinder; the third group of cylinders is provided with an unlocking mechanism, which includes a second elastic member 2121, a plug 2122 (piston), an unlocking end cover 2123, an unlocking piston 2124, an unlocking plug 2125, an unlocking air inlet joint 2126 and a plurality of seals, and the second elastic member 2121 is arranged at the end of the cylinder. The dial 22 is driven to rotate by the movement of the pistons 2112 of the first group and the second group of cylinders and the plug 2122 of the third group of cylinders, and the elastic member can be specifically set as a compression spring.

[0050] Based on the above, the chuck device has three states, namely, normal state, clamping state and release state. Among them:

[0051] Normal state: The plug 2122 and the two pistons 2112 rotate the dial 22 under the drive of their respective spring forces to push out the clamping claws 24, such as Figure 6 As shown;

[0052] Clamping state: the plug 2122 is close to the spring side and the piston 2112 is close to the spring side. The plug 2122 and the piston 2112 are driven by the spring force and air pressure to rotate the dial 22 to push the clamping claw 24 out of the clamping claw groove 23, thereby clamping the workpiece. Figure 6 As shown;

[0053] Release state: When the plug 2122 is away from the spring side and any piston 2112 is away from the spring side, the air pressure of the third group of cylinders overcomes the spring force to push the plug 2122 to move in the opposite direction, and the air pressure of the first and second groups of cylinders overcomes the spring force to push the piston 2112 to move in the opposite direction, and the dial 22 is turned to retract the clamp 24, thereby releasing the workpiece. Figure 5 shown.

[0054] It should be noted that one of the three groups of cylinders is provided with an unlocking mechanism, so that when the first air inlet connector 11 falls off, pneumatic or manual unlocking can be achieved through the unlocking mechanism, thereby achieving the purpose of releasing the workpiece.

[0055] Specifically, the above-mentioned unlocking mechanism can be specifically set as a pneumatic unlocking mechanism, which includes a plug 2122, an unlocking piston 2124 and an unlocking air inlet connector 2126. The external air source is connected through the unlocking air inlet connector 2126 to push the unlocking piston 2124 to squeeze the plug 2122. The movement process of the plug 2122 is the same as the movement mode of the piston 2112 in the first group and the second group of cylinders.

[0056] At the same time, a second elastic member 2121 is provided on the side of the plug 2122 away from the unlocking piston 2124. The second elastic member 2121 is generally configured as a compression spring. The second elastic member 2121 provides an elastic force to the plug 2122 to enable it to move in a direction close to the unlocking air inlet connector 2126.

[0057] When unlocking is required, the plug 2122 is squeezed by the unlocking piston 2124 to shrink the compression spring. At this time, the plug 2122 moves to the end of the cylinder, and the dial 22 is rotated. The dial 22 pulls the clamping claw 24 back to the working position A of the waist-shaped groove 222 of the dial 22 through the clamping claw shaft 241, thereby realizing pneumatic unlocking.

[0058] In order to ensure the stability of the movement of the plug 2122, the unlocking air inlet connector 2126 is connected to an unlocking plug 2125 for limiting the movement of the unlocking piston 2124 in the direction close to the unlocking air inlet connector 2126, and the unlocking plug 2125 is axially provided with a vent hole for the flow of gas entering through the unlocking air inlet connector 2126; the unlocking piston 2124 is specifically a T-shaped structure, and the outer sleeve of the unlocking piston 2124 is provided with an unlocking end cover 2123, and when the unlocking piston 2124 moves to a preset position in a direction away from the unlocking air inlet connector 2126, the unlocking end cover 2123 is used to contact and resist the unlocking piston 2124, thereby achieving the purpose of limiting.

[0059] After the chuck is installed, the air inlet and outlet holes are usually located inside the equipment. Through the above-mentioned unlocking mechanism, when the first air inlet connector 11 accidentally falls off and the chuck cannot be unlocked normally (the workpiece cannot be removed at this time, affecting maintenance), compressed air can be passed into the unlocking air inlet connector 2126 through the above-mentioned unlocking mechanism to release the workpiece; when the compressed air is abnormal, the unlocking air inlet connector 2126 can also be directly removed and the unlocking piston 2124 can be pushed with a screwdriver to release the workpiece.

[0060] The action principle of the chuck device is:

[0061] During normal operation, compressed air enters the unlocking chamber 3 from the first air inlet connector 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 chamber 3 to push the piston 2112 and the plug 2122 to overcome the spring force to move, so as to rotate the dial 22. The dial 22 pulls the clamping claw 24 back to the position A of the waist-shaped groove 222 of the dial 22 through the clamping claw shaft 241. At this time, the three clamping claws 24 are completely retracted into the clamping claw groove 23, and the workpiece can be put in at this time. Figure 5 As shown; after the workpiece is placed, the first air inlet connector 11 releases pressure, and the second air inlet connector 12 takes in air, which enters the cavities of the three groups of cylinders through the second air holes 41 of the locking chamber 4 and pushes the piston 2112 and the plug 2122 to move in the opposite direction together with the spring force. When the piston 2112 moves, the dial 22 is rotated, and the dial 22 pushes the clamping claw 24 to the position B of the waist-shaped groove 222 of the dial 22 through the clamping claw shaft 241. At this time, the three clamping claws 24 extend out of the clamping claw groove 23 to lock the workpiece, as shown in FIG. Figure 6 As shown; when the air pipe of the first air inlet connector 11 of the disk cover 1 falls off, the workpiece cannot be removed at this time, and compressed air is introduced into the unlocking air inlet connector 2126 to push the unlocking piston 2124 to move, and the unlocking piston 2124 then pushes the plug head 2122 to overcome the spring force to move to rotate the dial 22, and the dial 22 pulls the clamping claw 24 back to the work position A of the waist-shaped groove 222 of the dial 22 through the clamping claw shaft 241, thereby realizing pneumatic unlocking. When the compressed air is abnormal, the unlocking air inlet connector 2126 can also be directly removed and the unlocking piston 2124 can be pushed with a screwdriver to release the workpiece.

[0062] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0063] The above is a detailed introduction to the chuck device provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the scheme and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A chuck device, characterized in that: The invention comprises a disc body (2) and a disc cover (1) fixedly connected to the disc body (2), wherein a plurality of cylinder assemblies (21) distributed along the circumferential direction are arranged inside the disc body (2), wherein the disc body (2) and the disc cover (1) are fixedly connected to form an unlocking cavity (3) and a locking cavity (4), wherein the unlocking cavity (3) and the locking cavity (4) are respectively connected to a plurality of cylinder assemblies (21) through a plurality of air holes, and the disc cover (1) is provided with a first air inlet joint (11) and a second air inlet joint (12) respectively connected to the unlocking cavity (3) and the locking cavity (4); The disk cover (1) is provided with a first stepped surface (10), the disk body (2) is provided with a second stepped surface (20) 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 provided between the disk cover (1) and the disk body (2), the first annular groove (101) is located between the first sealing ring (201) and the second sealing ring (202), and the second annular groove (102) is located between the second sealing ring (202) and the third sealing ring (203); 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 sealing ring (201) and the second sealing ring (202) form the unlocking chamber (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 chamber (4); The first air inlet connector (11) and the second air inlet connector (12) are arranged at the center of the disk cover (1), and the first air inlet connector (11) and the second air inlet connector (12) are parallel to each other; The number of the cylinder assemblies (21) is three, and any one of the cylinder assemblies (21) contains a group of cylinders, and one of the three groups of cylinders is provided with an unlocking mechanism for releasing the workpiece by pneumatic or manual unlocking when the first air inlet connector (11) falls off; The unlocking mechanism is specifically a pneumatic unlocking mechanism, comprising 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 squeeze the plug head (2122) to move; A second elastic member (2121) is provided on a side of the plug head (2122) away from the unlocking piston (2124), and the second elastic member (2121) provides an elastic force to the plug head (2122) to enable the plug head (2122) to move in a direction close to the unlocking air inlet connector (2126).

2. The chuck device according to claim 1, characterized in that The second stepped surface (20) is provided with three mounting grooves for mounting the first sealing ring (201), the second sealing ring (202) and the third sealing ring (203) respectively.

3. The chuck device according to claim 1, characterized in that: The unlocking air inlet connector (2126) is connected to an unlocking plug (2125) for limiting the movement of the unlocking piston (2124) in a direction close to the unlocking air inlet connector (2126), and the unlocking plug (2125) is provided with an axial ventilation hole for allowing the gas entering through the unlocking air inlet connector (2126) to flow.

4. The chuck device according to claim 3, characterized in that: The unlocking piston (2124) is specifically a T-shaped structure, and the outer sleeve of the unlocking piston (2124) is provided with an unlocking end cover (2123) for contacting and abutting against the unlocking piston (2124) when the unlocking piston (2124) moves to a preset position in a direction away from the unlocking air inlet connector (2126).

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