Pneumatic clamping jaw for automatically assembling sealing ring

Abstract

The pneumatic clamping jaw for automatic assembly of the sealing ring comprises a tensioning assembly and a stripping assembly, the tensioning assembly comprises an inner cylinder, a mandrel, a clamping spring and a plurality of clamping blocks, a first sliding cavity is formed in the inner cylinder, the mandrel is arranged in the first sliding cavity in a sliding mode, one end of each clamping block is connected with the inner cylinder in a rotating mode, and the other end of each clamping block is connected with the stripping assembly. The stripping assembly comprises an outer cylinder and a stripping spring, a second sliding cavity is formed in the outer cylinder, the inner cylinder is arranged in the second sliding cavity in a sliding mode, the stripping spring abuts against the inner cylinder and the outer cylinder, the stripping spring is used for pushing the inner cylinder, and the outer cylinder is provided with a second sliding cavity. When air pressure is injected into the first sliding cavity, the mandrel drives the clamping blocks to be away from each other to open the sealing ring, when air pressure is injected into the second sliding cavity, the bottom end of the outer cylinder pushes out the sealing ring opened by the clamping blocks, and therefore the operation of automatically opening and assembling the sealing ring is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing ring assembly, in particular to a pneumatic clamping jaw for automatic sealing ring assembly. Background Art

[0002] A sealing ring is an accessory used for sealing.

[0003] The sealing ring usually needs to be sleeved in an annular groove. In order to realize the automatic assembly of the sealing ring, an automatic assembly device for the sealing ring has appeared. For example, the Chinese patent document with the publication number CN106271585A discloses a sealing ring assembly machine, which includes a bearing device and a guide device, which are configured to bear the sealing ring; the bearing device and the target part can move relative to each other; after the bearing device and the target part are configured to move relative to each other, the two are in contact or separated; it is arranged on the path of sleeved sealing ring on the bearing device to provide guidance for the sealing ring; the guide device and the bearing device can move relative to each other; after the guide device and the bearing device are configured to move relative to each other, the guide device retracts into or extends out of the bearing device; and a pushing device, which can move relative to the bearing device; after the pushing device is configured to move relative to the bearing device, it can push the sealing ring from the bearing device to the target part. In this way, the sealing ring is pushed from the bearing device to the outer groove of the target part by the pushing device.

[0004] However, the existing sealing ring assembly machine has the following problems: the prior art only mentions that the sealing ring is put on the carrying device, that is, the sealing ring is in a taut state on the carrying device, and the prior art does not solve the problem of how to take the sealing ring from the natural state and put it on the carrying device. Therefore, the prior art does not actually solve the problem of automatic assembly of the sealing ring. Therefore, the pneumatic clamp for automatic assembly of the sealing ring of the present application is proposed. Utility Model Content

[0005] The utility model aims to overcome the deficiencies in the prior art and provide a pneumatic clamp for automatic assembly of a sealing ring which can automatically take up the sealing ring from a natural state and open it to finally assemble the sealing ring.

[0006] The technical solution adopted by the utility model is:

[0007] A pneumatic clamp for automatic assembly of a sealing ring, comprising:

[0008] A tensioning assembly, the tensioning assembly comprises an inner cylinder, a core shaft, a clamping spring and a plurality of clamping blocks, a first sliding cavity is provided in the inner cylinder, the core shaft is slidably arranged in the first sliding cavity, one end of each clamping block is rotatably connected to the inner cylinder, and each clamping block is distributed at equal angles around the inner cylinder, each clamping block is also rotatably connected to the core shaft, the clamping spring is respectively in contact with the core shaft and the inner cylinder, and the clamping spring is used to push the core shaft so that the core shaft drives each clamping block to move away from one end of the inner cylinder and move closer to each other;

[0009] A stripping assembly, the stripping assembly comprising an outer cylinder and a stripping spring, the outer cylinder is provided with a second sliding cavity, the inner cylinder is slidably arranged in the second sliding cavity, the stripping spring is respectively in contact with the inner cylinder and the outer cylinder, and the stripping spring is used to push the inner cylinder so that one end of each clamping block away from the inner cylinder extends out from the bottom end of the outer cylinder;

[0010] When air pressure is injected into the first sliding cavity, the core shaft drives the ends of the clamping blocks away from the inner cylinder to move away from each other to open the sealing ring. When air pressure is injected into the second sliding cavity, the inner cylinder drives the ends of the clamping blocks away from the inner cylinder to retract into the bottom end of the outer cylinder, so that the bottom end of the outer cylinder pushes out the opened sealing rings of the clamping blocks.

[0011] Optionally, the inner cylinder includes a cylinder body and an articulated sleeve, the first sliding cavity is located in the cylinder body, and the articulated sleeve is threadedly connected in the first sliding cavity.

[0012] Optionally, the core shaft includes a shaft body and a hinge head, the shaft body is slidably arranged in the first sliding cavity, and one end of the shaft body passes through the hinge sleeve, the hinge head is screwed to the end of the shaft body away from the first sliding cavity, the clamping spring is sleeved outside the shaft body, and the clamping spring is respectively abutted against the shaft body and the hinge sleeve.

[0013] Optionally, a plurality of convex blocks distributed at equal angles are arranged on the outer side wall of the hinge sleeve, and each of the clamping blocks is rotatably connected to each of the convex blocks.

[0014] Optionally, a plurality of support blocks distributed at equal angles are arranged on the outer side wall of the hinge joint, and each of the clamping blocks is rotatably connected to each of the support blocks.

[0015] Optionally, the clamp block includes a clamp arm and a transfer arm, one end of the clamp arm is rotatably connected to the protrusion, one end of the transfer arm is rotatably connected to the support block, the middle part of the clamp arm is rotatably connected to the other end of the transfer arm, and the other end of the clamp arm is used to open the sealing ring.

[0016] Optionally, a clamping groove is provided on the outer side wall of one end of the clamping arm away from the protrusion.

[0017] Optionally, the outer cylinder includes a sleeve and a card cover, the second sliding cavity is located in the sleeve, the card cover is screwed in the second sliding cavity, the stripping spring is sleeved outside the cylinder, and the stripping spring is respectively in contact with the cylinder body and the card cover.

[0018] Optionally, the outer cylinder further comprises a guide shell, the guide shell is sleeved on the bottom end of the sleeve, a plurality of air avoidance grooves distributed at equal angles are circumferentially opened on the guide shell, and each of the clamping arms is respectively arranged opposite to each of the air avoidance grooves.

[0019] Optionally, the inner side wall of the guide shell is further provided with a plurality of guide grooves, and a partial structure of each protrusion is slidably disposed in each guide groove.

[0020] The beneficial effects of the utility model are:

[0021] The utility model discloses a pneumatic clamp for automatic assembly of a sealing ring, comprising a tensioning assembly and a stripping assembly, wherein the tensioning assembly comprises an inner cylinder, a core shaft, a clamping spring and a plurality of clamping blocks, wherein a first sliding cavity is provided in the inner cylinder, the core shaft is slidably arranged in the first sliding cavity, one end of each clamping block is rotatably connected to the inner cylinder, and each clamping block is distributed at equal angles around the inner cylinder, each clamping block is also rotatably connected to the core shaft, the clamping spring is respectively in contact with the core shaft and the inner cylinder, and the clamping spring is used to push the core shaft so that the core shaft drives each clamping block away from one end of the inner cylinder and moves closer to each other, and the stripping assembly comprises an outer cylinder and a stripping spring, a second sliding cavity is provided in the outer cylinder, the inner cylinder is slidably arranged in the second sliding cavity, the stripping spring is respectively in contact with the inner cylinder and the outer cylinder, the stripping spring is used to push the inner cylinder, so that the end of each clamping block away from the inner cylinder extends out from the bottom end of the outer cylinder, when the first sliding cavity is injected with air pressure, the core shaft drives the ends of each clamping block away from the inner cylinder to move away from each other to open the sealing ring, when the second sliding cavity is injected with air pressure, the inner cylinder drives the ends of each clamping block away from the inner cylinder to retract into the bottom end of the outer cylinder, so that the bottom end of the outer cylinder pushes out the opened sealing rings of each clamping block. In this way, by first injecting compressed air into the first sliding cavity, the free ends of each clamping block open the sealing ring, and then injecting compressed air into the second sliding cavity, each clamping block drives the sealing ring to slide into the bottom end of the outer cylinder, and in this process, the bottom end of the outer cylinder pushes out the opened sealing rings on each clamping block. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a pneumatic clamp for automatic assembly of a sealing ring according to one embodiment of the utility model;

[0023] Figure 2for Figure 1 The schematic cross-sectional structure diagram of the pneumatic clamp for automatic assembly of the sealing ring shown;

[0024] Figure 3 for Figure 1 A schematic diagram of the structure of another state of the pneumatic clamp for automatic assembly of a sealing ring shown;

[0025] Figure 4 for Figure 1 A schematic structural diagram of another state of the pneumatic clamp for automatic assembly of a sealing ring shown;

[0026] Figure 5 It is a structural schematic diagram of a tensioning assembly according to one embodiment of the utility model;

[0027] Figure 6 for Figure 5 A schematic cross-sectional view of the tensioning assembly is shown.

[0028] Description of reference numerals:

[0029] 10. Pneumatic clamp for automatic assembly of sealing ring; 20. Sealing ring; 100. Tensioning assembly; 200. Stripping assembly; 110. Inner cylinder; 120. Mandrel; 130. Clamping spring; 140. Clamping block; 1111. First sliding cavity; 210. Outer cylinder; 220. Stripping spring; 2111. Second sliding cavity; 111. Cylinder body; 112. Articulated sleeve; 121. Axle body; 122. Articulated head; 113. Protrusion; 123. Support block; 141. Clamping arm; 142. Adapter arm; 1411. Clamping groove; 211. Sleeve seat; 212. Clamp cover; 213. Guide shell; 2131. Avoidance groove; 2132. Guide groove; 1112. First air inlet hole; 2112. Second air inlet hole. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings show preferred embodiments of the present invention.

[0031] like Figures 1 to 6As shown, a pneumatic clamp 10 for automatic assembly of a sealing ring includes a tensioning assembly 100 and a stripping assembly 200. The tensioning assembly 100 includes an inner cylinder 110, a core shaft 120, a clamping spring 130, and a plurality of clamping blocks 140. A first sliding cavity 1111 is provided in the inner cylinder 110. The core shaft 120 is slidably disposed in the first sliding cavity 1111. One end of each clamping block 140 is rotatably connected to the inner cylinder 110, and each clamping block 140 surrounds the inner cylinder 110. The clamping blocks 140 are equi-angularly distributed, and are rotatably connected to the core shaft 120. The clamping spring 130 is respectively in contact with the core shaft 120 and the inner cylinder 110. The clamping spring 130 is used to push the core shaft 120 so that the core shaft 120 drives the ends of the clamping blocks 140 away from the inner cylinder 110 to move closer to each other. When air pressure is injected into the first sliding cavity 1111, the core shaft 120 drives the ends of the clamping blocks 140 away from the inner cylinder 110 to move away from each other to open the sealing ring 20.

[0032] It should be noted that the tensioning assembly 100 is used to open the sealing ring 20 in a natural state. Specifically, the core shaft 120 is coaxially arranged with the inner cylinder 110, and a first sliding cavity 1111 is opened in the axial direction of the inner cylinder 110. One end of the core shaft 120 is slidably arranged in the first sliding cavity 1111. One end of each clamping block 140 is rotatably connected to the bottom end of the inner cylinder 110. For example, the clamping block 140 is installed on the inner cylinder 110 through a bearing, so that the clamping block 140 can rotate relative to the inner cylinder 110. The clamping blocks 140 are circumferentially distributed at equal angles on the outer side wall of the inner cylinder 110, that is, the angles between any two adjacent clamping blocks 140 are consistent. Further, the middle part of each clamping block 140 is also rotatably connected to the core shaft 120. For example, the clamping block 140 and the core shaft 120 are also fixed by a bearing. The clamping spring 130 is sleeved on the outer wall of the core shaft 120, and the clamping spring 130 is respectively in contact with the core shaft 120 and the inner cylinder 110. In this way, under the elastic thrust of the clamping spring 130, the core shaft 120 drives the free ends of the clamping blocks 140 (the free ends of the clamping blocks 140 refer to the ends away from the connection with the inner cylinder 110) to move closer to each other. It should be noted that when the free ends of the clamping blocks 140 move closer to each other to the limit position, the maximum distance between the clamping blocks 140 is less than the inner diameter of the sealing ring 20 in the natural state. In this way, when the clamping blocks 140 move closer to each other, the clamping blocks 140 can pass through the sealing ring 20. When compressed air is injected into the first sliding cavity 1111 by an external air compressor, the compressed air pushes the core shaft 120 located in the first sliding cavity 1111, so that the core shaft 120 pushes to compress the clamping spring 130, thereby causing the free ends of each clamp block 140 to move away from each other, thereby causing each clamp block 140 to open the sealing ring 20 in a natural state, and the sealing ring 20 is in an open state at this time. In one embodiment, five clamp blocks 140 are provided, so that the sealing ring 20 is opened by the free ends of the five clamp blocks 140, and the sealing ring 20 is in a pentagonal structure.

[0033] like Figure 1 As shown, the stripping assembly 200 includes an outer cylinder 210 and a stripping spring 220. A second sliding cavity 2111 is opened in the outer cylinder 210. The inner cylinder 110 is slidably set in the second sliding cavity 2111. The stripping spring 220 is respectively in contact with the inner cylinder 110 and the outer cylinder 210. The stripping spring 220 is used to push the inner cylinder 110 so that one end of each clamping block 140 away from the inner cylinder 110 extends from the bottom end of the outer cylinder 210. When air pressure is injected into the second sliding cavity 2111, the inner cylinder 110 drives one end of each clamping block 140 away from the inner cylinder 110 to retract into the bottom end of the outer cylinder 210, so that the bottom end of the outer cylinder 210 pushes out the opened sealing ring 20 of each clamping block 140.

[0034] It should be noted that the inner cylinder 110 is coaxially installed in the second sliding cavity 2111. The stripping spring 220 is respectively in contact with the inner cylinder 110 and the outer cylinder 210, so that the inner cylinder 110 slides relative to the outer cylinder 210 under the elastic thrust of the stripping spring 220, and then the inner cylinder 110 drives the free ends of each clamping block 140 to extend from the bottom end of the outer cylinder 210. When compressed air is injected into the second sliding cavity 2111 by an external air compressor, the inner cylinder 110 pushes and compresses the stripping spring 220, and the inner cylinder 110 drives each clamping block 140 to retract into the outer cylinder 210. In this way, by first injecting compressed air into the first sliding cavity 1111, the free end of each clamping block 140 opens the sealing ring 20, and then injecting compressed air into the second sliding cavity 2111, each clamping block 140 drives the sealing ring 20 to slide into the bottom end of the outer cylinder 210. In this process, the bottom end of the outer cylinder 210 pushes out the opened sealing ring 20 on each clamping block 140. It should be noted that when the outer cylinder 210 is regarded as fixed, the inner cylinder 110 drives each clamping block 140 to retract from the bottom end of the outer cylinder 210. When the inner cylinder 110 is regarded as fixed, it is equivalent to the outer cylinder 210 being sleeved on the outside of each clamping block 140 and extending out. Therefore, when each clamping block 140 is docked with the workpiece to be installed, by injecting compressed air into the first sliding cavity 1111 and the second sliding cavity 2111 in sequence, the sealing ring 20 can be opened and assembled on the workpiece to be installed.

[0035] like Figure 2 , Figure 5 and Figure 6 As shown, in one embodiment, the inner cylinder 110 includes a cylinder body 111 and a hinge sleeve 112 , the first sliding cavity 1111 is located in the cylinder body 111 , and the hinge sleeve 112 is threadedly connected in the first sliding cavity 1111 .

[0036] It should be noted that the inner cylinder 110 is configured as a combination structure of a cylinder body 111 and an articulated sleeve 112 , so that one end of the core shaft 120 slides in the first sliding cavity 1111 , and the articulated sleeve 112 confines the core shaft 120 in the first sliding cavity 1111 .

[0037] like Figure 2 and Figure 6 As shown, in one embodiment, the core shaft 120 includes a shaft body 121 and a hinge head 122, the shaft body 121 is slidably disposed in the first sliding cavity 1111, and one end of the shaft body 121 passes through the hinge sleeve 112, the hinge head 122 is screwed to one end of the shaft body 121 away from the first sliding cavity 1111, and the clamping spring 130 is sleeved outside the shaft body 121, and the clamping spring 130 is respectively abutted against the shaft body 121 and the hinge sleeve 112.

[0038] Specifically, one end of the shaft body 121 passes through the hinge head 122 to extend into the first sliding cavity 1111 and slide, wherein the end of the shaft body 121 located in the first sliding cavity 1111 is adapted to be installed between the first sliding cavity 1111, so that the shaft body 121 forms a closed cavity in the first sliding cavity 1111. For example, the shaft body 121 is set to a structure in which the diameter of the shaft body 121 located in the first sliding cavity 1111 is larger than the diameter of other parts, and then the clamping spring 130 is sleeved on the shaft body 121, so that the clamping spring 130 pushes the shaft body 121 and the hinge sleeve 112 respectively, so that the clamping spring 130 can push the shaft body 121 to slide into the first sliding cavity 1111 in a natural state.

[0039] like Figure 5 As shown, in one embodiment, a plurality of convex blocks 113 distributed at equal angles are provided on the outer side wall of the hinge sleeve 112 , and each clamping block 140 is rotatably connected to each convex block 113 .

[0040] Specifically, each protrusion 113 is protrudingly disposed on the outer side wall of the hinge sleeve 112, and each protrusion 113 is distributed at an equal angle. By passing a pin through the clamping block 140 and the protrusion 113 in sequence, the clamping block 140 can rotate relative to the protrusion 113.

[0041] like Figure 5 As shown, in one embodiment, a plurality of support blocks 123 distributed at equal angles are disposed on the outer side wall of the hinge joint 122 , and each clamping block 140 is rotatably connected to each support block 123 .

[0042] Specifically, the support blocks 123 are distributed at equal angles on the outer side wall of the hinge joint 122, and the positions of the support blocks 123 and the protrusions 113 are arranged one by one. Similarly, by passing the pin through the clamping block 140 and the support block 123 in sequence, the clamping block 140 can rotate relative to the support block 123.

[0043] like Figure 5 As shown, in one embodiment, the clamping block 140 includes a clamping arm 141 and a transfer arm 142, one end of the clamping arm 141 is rotatably connected to the protrusion 113, one end of the transfer arm 142 is rotatably connected to the support block 123, the middle part of the clamping arm 141 is rotatably connected to the other end of the transfer arm 142, and the other end of the clamping arm 141 is used to open the sealing ring 20.

[0044] Specifically, by passing a pin through one end of the clamp arm 141 and the protrusion 113 in sequence, one end of the clamp arm 141 can rotate relative to the protrusion 113. Further, by passing a pin through one end of the transfer arm 142 and the support block 123 in sequence, one end of the transfer arm 142 can rotate relative to the support block 123. Further, the other end of the transfer arm 142 is rotatably connected to the middle position of the clamp arm 141 by passing a pin, so that the other end of the transfer arm 142 can rotate relative to the middle of the clamp arm 141. In this way, when the shaft body 121 slides into the first sliding cavity 1111, the ends of each clamp arm 141 away from the protrusion 113 can eventually approach each other. When compressed air is injected into the first sliding cavity 1111, the shaft body 121 compresses the clamping spring 130 and slides in the opposite direction, and eventually the ends of each clamp arm 141 away from the protrusion 113 can move away from each other, thereby opening the sealing ring 20.

[0045] like Figure 5 As shown, in one embodiment, a clamping groove 1411 is formed on the outer wall of one end of the clamping arm 141 away from the protrusion 113 .

[0046] Specifically, a clamping groove 1411 is formed on the outer wall of each clamping arm 141 at the end away from the protrusion 113 , so that the sealing ring 20 is sleeved in the clamping groove 1411 to prevent the sealing ring 20 from sliding off the clamping arm 141 .

[0047] like Figure 2 As shown, in one embodiment, the outer cylinder 210 includes a sleeve 211 and a card cover 212, the second sliding cavity 2111 is located in the sleeve 211, the card cover 212 is screwed into the second sliding cavity 2111, the stripping spring 220 is sleeved outside the cylinder 111, and the stripping spring 220 is respectively in contact with the cylinder 111 and the card cover 212.

[0048] Specifically, the card cover 212 is screwed on the top of the sleeve 211 , the cylinder 111 passes through the card cover 212 , and a gap is provided between the cylinder 111 and the card cover 212 , and the card cover 212 abuts against one end of the stripping spring 220 .

[0049] like Figure 1 and Figure 2 As shown, in one embodiment, the outer cylinder 210 further includes a guide shell 213, which is sleeved on the bottom end of the sleeve 211, and a plurality of air avoidance grooves 2131 distributed at equal angles are circumferentially opened on the guide shell 213, and each clamping arm 141 is respectively arranged opposite to each air avoidance groove 2131.

[0050] Specifically, the guide shell 213 is mounted on the outer side wall of the bottom of the sleeve 211 by means of machine screws, and a plurality of air-avoiding grooves 2131 are provided on the guide shell 213, so that each clamping arm 141 is aligned with each air-avoiding groove 2131. In this way, when each clamping arm 141 moves away from each other to open the sealing ring 20, the end of each clamping arm 141 away from the protrusion 113 is sunk into the air-avoiding groove 2131. When the clamping arm 141 is retracted into the guide shell 213, the lower end surface of the guide shell 213 can push out the opened sealing ring 20 on each clamping arm 141 to be assembled on the workpiece.

[0051] like Figure 2 As shown, in one embodiment, the inner wall of the guide shell 213 is further provided with a plurality of guide grooves 2132 , and a portion of the structure of each protrusion 113 is slidably disposed in each guide groove 2132 .

[0052] It should be noted that in order to ensure that each clamping arm 141 is aligned with each avoidance groove 2131 , a plurality of guide grooves 2132 distributed along the axial direction are opened on the inner side wall of the guide shell 213 , so that the protrusions 113 slide along the guide grooves 2132 one by one.

[0053] like Figure 2 As shown, in one embodiment, a first air inlet hole 1112 communicating with the first sliding cavity 1111 is further provided in the cylinder 111, and the diameter of the first air inlet hole 1112 is smaller than the diameter of the first sliding cavity 1111. In this way, when the shaft 121 slides in the first sliding cavity 1111, it will be supported by the first air inlet hole 1112 to achieve position limiting. In one embodiment, a trachea joint is provided at one end of the first air inlet hole 1112 away from the first sliding cavity 1111, so that the trachea can be fixed by the trachea joint.

[0054] In one embodiment, a first sealing ring is sleeved on the outer wall of the shaft body 121 at one end of the first sliding cavity 1111, and the first sealing ring abuts against the inner wall of the first sliding cavity 1111. The first sealing ring seals the first sliding cavity 1111 connected to the first air inlet 1112. In one embodiment, two first sealing rings are provided.

[0055] Furthermore, if Figure 2As shown, the sleeve 211 is also provided with a second air inlet 2112 connected to the second sliding cavity 2111, and a second sealing ring is sleeved on the outer wall of the cylinder 111, and the second sealing ring abuts against the inner wall of the second sliding cavity 2111, and a third sealing ring is embedded on the inner wall of the second sliding cavity 2111, and the third sealing ring abuts against the outer wall of the cylinder 111, so that the second sliding cavity 2111 connected to the second air inlet 2112 is in a closed state. In this way, by providing the second sealing ring and the third sealing ring, the air tightness of the second sliding cavity 2111 can be ensured. In one embodiment, a trachea joint is also provided at one end of the second air inlet 2112 away from the second sliding cavity 2111, so that the trachea can be fixedly installed through the trachea joint.

[0056] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A pneumatic clamp for automatic assembly of a sealing ring, characterized in that: include: A tensioning assembly, the tensioning assembly comprises an inner cylinder, a core shaft, a clamping spring and a plurality of clamping blocks, a first sliding cavity is provided in the inner cylinder, the core shaft is slidably arranged in the first sliding cavity, one end of each clamping block is rotatably connected to the inner cylinder, and each clamping block is distributed at equal angles around the inner cylinder, each clamping block is also rotatably connected to the core shaft, the clamping spring is respectively in contact with the core shaft and the inner cylinder, and the clamping spring is used to push the core shaft so that the core shaft drives each clamping block to move away from one end of the inner cylinder and move closer to each other; A stripping assembly, the stripping assembly comprising an outer cylinder and a stripping spring, the outer cylinder is provided with a second sliding cavity, the inner cylinder is slidably arranged in the second sliding cavity, the stripping spring is respectively in contact with the inner cylinder and the outer cylinder, and the stripping spring is used to push the inner cylinder so that one end of each clamping block away from the inner cylinder extends out from the bottom end of the outer cylinder; When air pressure is injected into the first sliding cavity, the core shaft drives the ends of the clamping blocks away from the inner cylinder to move away from each other to open the sealing ring. When air pressure is injected into the second sliding cavity, the inner cylinder drives the ends of the clamping blocks away from the inner cylinder to retract into the bottom end of the outer cylinder, so that the bottom end of the outer cylinder pushes out the opened sealing rings of the clamping blocks.

2. A pneumatic clamp for automatic assembly of a sealing ring according to claim 1, characterized in that: The inner cylinder comprises a cylinder body and an articulated sleeve, the first sliding cavity is located in the cylinder body, and the articulated sleeve is threadedly connected in the first sliding cavity.

3. A pneumatic clamp for automatic assembly of a sealing ring according to claim 2, characterized in that: The core shaft includes a shaft body and a hinge head. The shaft body is slidably arranged in the first sliding cavity, and one end of the shaft body passes through the hinge sleeve. The hinge head is screwed to the end of the shaft body away from the first sliding cavity. The clamping spring is sleeved outside the shaft body, and the clamping spring is respectively in contact with the shaft body and the hinge sleeve.

4. The pneumatic clamp for automatic assembly of a sealing ring according to claim 3, characterized in that: The outer side wall of the hinge sleeve is provided with a plurality of convex blocks distributed at equal angles, and each of the clamping blocks is rotatably connected to each of the convex blocks.

5. The pneumatic clamp for automatic assembly of a sealing ring according to claim 4, characterized in that: A plurality of support blocks distributed at equal angles are arranged on the outer side wall of the hinge joint, and each clamping block is rotatably connected to each support block.

6. A pneumatic clamp for automatic assembly of a sealing ring according to claim 5, characterized in that: The clamp block includes a clamp arm and a transfer arm, one end of the clamp arm is rotatably connected to the protrusion, one end of the transfer arm is rotatably connected to the support block, the middle part of the clamp arm is rotatably connected to the other end of the transfer arm, and the other end of the clamp arm is used to open the sealing ring.

7. A pneumatic clamp for automatic assembly of a sealing ring according to claim 6, characterized in that: A clamping groove is provided on the outer side wall of one end of the clamping arm away from the protrusion.

8. The pneumatic clamp for automatic assembly of a sealing ring according to claim 6, characterized in that: The outer cylinder includes a sleeve and a card cover, the second sliding cavity is located in the sleeve, the card cover is screwed in the second sliding cavity, the stripping spring is sleeved outside the cylinder, and the stripping spring is respectively in contact with the cylinder body and the card cover.

9. The pneumatic clamp for automatic assembly of a sealing ring according to claim 8, characterized in that: The outer cylinder further comprises a guide shell, which is sleeved on the bottom end of the sleeve, and the guide shell is circumferentially provided with a plurality of air-avoiding grooves distributed at equal angles, and each of the clamping arms is respectively arranged opposite to each of the air-avoiding grooves.

10. The pneumatic clamp for automatic assembly of a sealing ring according to claim 9, characterized in that: The inner side wall of the guide shell is also provided with a plurality of guide grooves, and a part of the structure of each protrusion is slidably disposed in each guide groove.

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