O-shaped ring assembling device

Abstract

An O-shaped ring assembling device comprises a cylinder body, a first rod body, a second rod body, a first seat body and a second seat body, a first containing groove and a second containing groove are formed in the upper end face of the cylinder body, the first rod body and the second rod body are arranged in an internally-sleeved and externally-sleeved mode, and the piston end of the second rod body and the piston end of the first rod body are arranged in an up-down spaced mode. The first accommodating grooves and the second accommodating grooves are communicated with the upper cavity and are annularly staggered, the first seat body is fixedly connected to the driving end of the first rod body, mounting arms are annularly arranged on the peripheral wall surface of the first seat body, the mounting arms are matched with the corresponding first accommodating grooves, and the second seat body is matched with the corresponding second accommodating grooves; the driving end of the second rod body is further provided with a top seat, the peripheral wall face of the top seat is arranged to be an upward conical face, the second seat body is provided with a driving inclined face to be matched with the conical face, and an elastic structure is further arranged between the second containing groove and the second seat body. The O-shaped ring assembling tool is convenient to operate, the accuracy and the stability of O-shaped ring assembling can be guaranteed, and the sealing reliability is improved.

Description

Technical Field

[0001] This utility model relates to the field of O-ring assembly technology, and in particular to an O-ring assembly device. Background Technology

[0002] Currently, the process of fitting sealing rings onto workpieces is done manually. Workers need to hold the workpiece and fit the sealing ring onto its end. Since the assembly of the sealing ring and the workpiece is done manually, manual operation is inconvenient. The sealing ring is subjected to uneven force and deforms significantly. The assembled sealing ring is prone to torsion deformation, which cannot guarantee the accuracy and stability of the sealing ring assembly, ultimately affecting the sealing and waterproofing effect. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an O-ring assembly device that is easy to operate, can ensure the accuracy and stability of O-ring assembly, and improve the sealing reliability.

[0004] The technical solution adopted by this utility model to solve its technical problem is an O-ring assembly device, including a cylinder, an inner and outer first rod and a second rod, and a first seat and a second seat. The cylinder has a communicating lower cavity and an upper cavity. The piston ends of the second rod and the first rod are spaced vertically apart in the lower cavity. The driving end of the first rod extends above the driving end of the second rod in the upper cavity. The upper part of the upper cavity is also through-connected. The upper end face of the cylinder also has a first receiving groove and a second receiving groove. The first receiving groove and the second receiving groove are both connected to the upper cavity and are circumferentially intersecting. The arrangement includes a first seat body whose middle part is fixedly connected to the driving end of the first rod body. Mounting arms are arranged circumferentially on the peripheral wall of the first seat body. Each mounting arm engages with a corresponding first receiving groove and can only move axially. The second seat body engages with a corresponding second receiving groove and can only move radially. A top seat is also mounted on the driving end of the second rod body. The peripheral wall of the top seat is an upward-facing conical surface. A driving inclined surface is provided on the second seat body, engaging with the conical surface. An elastic structure is also provided between the second receiving groove and the second seat body, creating a reverse force on the second seat body.

[0005] In the above scheme, firstly, the piston end of the second rod is moved upward in the lower cavity, thereby driving the top seat on the drive end of the second rod to move upward in the upper cavity. Since the peripheral wall surface of the top seat is set as an upward conical surface, and the second seat has a driving inclined surface that cooperates with the conical surface, and the second seat can only move radially in the second receiving groove, the second seat, driven by the upward movement of the top seat and in cooperation with the elastic structure, will move radially outward in the second receiving groove until it reaches the maximum stroke. The second clamp will then complete the radial opening of the O-ring. After the O-ring is radially opened, the product is placed in. Then, the piston end of the first rod is moved upward in the lower cavity, thereby driving the drive end of the first rod to move upward. Since the mounting arm can only move axially in the first receiving groove, the first seat... Driven by the upward movement of the driving end of the first rod, it moves axially upward at the first receiving groove, thereby causing the first clamp to push the O-ring upward out of the clamp. Then, the second clamp will push the O-ring into the sealing groove of the product along the outer wall surface. After installation, the piston ends of the first and second rods move downward, thereby driving the driving ends of the first and second rods to move downward. The mounting arm will move downward and reset to the first receiving groove under the drive of the first seat. The top seat moves downward and resets with the second rod. At the same time, the elastic structure also causes the second seat to move radially inward and reset at the second receiving groove. Therefore, the device with the above structure realizes reliable installation of the O-ring, the overall operation is convenient, and it can ensure the accuracy and stability of O-ring assembly and improve sealing reliability.

[0006] Furthermore, the elastic structure includes a first spring and a first limiting post. A first mounting hole is provided on the outer end face of the second seat. The center line of the first mounting hole is arranged parallel to the second seat. The first spring is installed in the first mounting hole in the same direction. The first limiting post is fixedly arranged relative to the opening of the first mounting hole. The first limiting post forms abutment and limiting against the first spring.

[0007] In the above scheme, the first spring is installed in the first mounting hole, which effectively limits the position of the first spring. The first limiting post is fixedly set at the opening of the first mounting hole, which provides support and limiting function for the first spring, so that the first spring can deform or return to its original position. It also limits the installation of the second seat. The center line of the first mounting hole is set parallel to the second seat. The use of the first spring is reasonable, which effectively ensures the reliability of the cooperation between the second seat and the top seat. The overall structural design is simple and reasonable.

[0008] Furthermore, the first limiting post is inserted at the corresponding position at the bottom of the second receiving groove, and a first clearance groove is provided on the outer wall of the second seat. The first clearance groove is used to cooperate with the first limiting post. The first clearance groove is connected to the first mounting hole and the center lines of the two are located on the same plane. A spring sleeve is also provided in the first mounting hole. The spring sleeve is arranged between the first limiting post and the first spring.

[0009] In the above scheme, the first limiting post can be pressed into the first relief groove from the outside of the second seat. After being pressed into place, the first limiting post can form a limit in the second receiving groove, which is convenient for installation. At the same time, the first relief groove also allows the second seat to move relative to the first limiting post. It also makes the center line of the first relief groove and the center line of the first mounting hole coplanar, so that the interaction between the first limiting post and the first spring is better after installation. The spring sleeve prevents the first spring from coming out, and also makes the interaction between the first limiting post and the first spring more stable.

[0010] Furthermore, a second mounting hole is provided on the upper end face of the mounting arm, the center line of the second mounting hole and the center line of the mounting arm are located on the same plane, and a third mounting hole is provided on the upper end face of the second base, the center line of the third mounting hole and the center line of the second base are located on the same plane.

[0011] In the above scheme, the setting of the second and third mounting holes enables the first and second clamps to be quickly disassembled and installed on the first and second bases, respectively, making the design more reasonable.

[0012] Furthermore, the outer end of the second receiving groove is through-hole, and the root of both sides of the second receiving groove is provided with a mounting groove. The mounting groove is provided along the center line of the second receiving groove. The two sides of the second base are provided with corresponding mounting protrusions, which cooperate with the mounting groove.

[0013] In the above scheme, the cooperation between the mounting protrusion and the mounting groove enables the second seat to move only radially within the second receiving groove, while also making the movement of the second seat smoother. The structure is simple and reasonable, and it is also convenient for installation.

[0014] Furthermore, a second clearance groove is formed on the top seat. The second clearance groove is arranged in a circumferential direction and is used to provide clearance for the corresponding mounting arm.

[0015] In the above scheme, the setting of the second clearance groove achieves the purpose of avoiding the mounting arm when the top seat moves upward without increasing the overall height of the cylinder and the second seat, making the design of the device more reasonable and occupying less space.

[0016] Furthermore, a second limiting post is fixedly installed at the bottom of the upper cavity of the cylinder body, and the upper end of the second limiting post moves through the top seat.

[0017] In the above scheme, by setting a second limiting post, the shaking of the top seat can be effectively prevented, making the movement of the top seat under the drive end of the second rod more reasonable.

[0018] Furthermore, the cylinder body includes an upper cylinder seat and a lower cylinder seat. The upper cylinder seat is fixed to the lower cylinder seat by a screw. The upper cavity, the first receiving groove, and the second receiving groove are formed on the upper cylinder seat. The lower cavity is formed on the lower cylinder seat. The lower cylinder seat also has a first air hole and a second air hole. The first air hole is disposed below the piston end of the first rod. The second air hole is disposed between the piston end of the first rod and the piston end of the second rod. A second spring is also provided between the top of the lower cavity and the piston end of the second rod.

[0019] In the above scheme, the cylinder body adopts a split structure, which allows the upper cylinder seat with the upper cavity and the lower cylinder seat with the lower cavity to be processed by different processes, which facilitates molding and processing. The setting of the first air hole and the second air hole allows the piston end of the second rod to move upward in the lower cavity and the piston end of the first rod to remain stationary or move downward in the lower cavity by allowing air to enter through the second air hole. The setting of the second spring allows the piston end of the second rod to move downward in the lower cavity and also has a buffering effect on the piston end of the second rod. The structural design is reasonable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 Cross-sectional view of the overall structure of this utility model Figure 1 ;

[0022] Figure 3 Cross-sectional view of the overall structure of this utility model Figure 2 ;

[0023] Figure 4 This is a schematic diagram of the top seat structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the second seat structure of the present invention. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the second seat structure of the present invention. Figure 2 ;

[0026] Figure 7 This is a schematic diagram of the upper cylinder seat structure of this utility model;

[0027] Figure 8 This is a schematic diagram of the first base structure of this utility model;

[0028] Figure 9 This is a schematic diagram of the lower cylinder seat structure of this utility model.

[0029] In the diagram: 1-Cylinder block, 2-First rod, 3-Second rod, 4-First seat, 5-Second seat, 6-Lower cavity, 7-Upper cavity, 8-First receiving groove, 9-Second receiving groove, 10-Mounting arm, 11-Top seat, 12-Conical surface, 13-Drive inclined surface, 14-First spring, 15-First limiting post, 16-First mounting hole, 17-First clearance groove, 18-Spring sleeve, 19-Second mounting hole, 20-Third mounting hole, 21-Mounting groove, 22-Mounting protrusion, 23-Second clearance groove, 24-Second limiting post, 25-Upper cylinder seat, 26-Lower cylinder seat, 27-First air hole, 28-Second air hole, 29-Second spring, 30-Third air hole, 31-Limiting snap ring, 32-Lower cylinder head. Detailed Implementation

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort. Furthermore, references to orientation only indicate the relative positional relationship between the components, not their absolute positional relationship.

[0031] Please see Figures 1 to 9 As shown, an O-ring assembly device includes a cylinder body 1, an inner and outer first rod body 2 and a second rod body 3, a first seat body 4 and a second seat body 5, the first seat body 4 and the second seat body 5 being used to install a first clamp and a second clamp, respectively.

[0032] The cylinder body 1 has a connected lower chamber 6 and an upper chamber 7. The piston ends of the second rod 3 and the first rod 2 are spaced vertically apart in the lower chamber 6. The driving end of the first rod 2 extends from the upper chamber 7 above the driving end of the second rod 3. The upper part of the upper chamber 7 is also through-hole. The upper end face of the cylinder body 1 is provided with a first receiving groove 8 and a second receiving groove 9. The first receiving groove 8 and the second receiving groove 9 are both connected to the upper chamber 7 and are arranged in a circumferential staggered pattern. The first receiving groove 8 and the second receiving groove 9 are arranged in a circumferential staggered pattern with the center of the upper chamber 7 as the center. The first base 4 is fixedly connected to the driving end of the first rod 2 at its middle part. More specifically, the first base 4 is fixed to the top of the driving end of the first rod 2 by screws. Mounting arms 10 are arranged circumferentially on the peripheral wall of the first base 4, the number of mounting arms 10 matching the number of first receiving slots 8. A first clamp is mounted on the mounting arm 10, and the mounting arm 10 engages with the corresponding first receiving slot 8 and can only move axially. More specifically, the shape of the first receiving slot 8 matches the shape of the mounting arm 10. The second base 5 is connected to the corresponding first... The two receiving slots 9 are matched and can only move radially. The number of second seats 5 is the same as the number of second receiving slots 9. The second clamps on the second seats 5 are also arranged in a ring around the center of the upper cavity 7. The first clamps and second clamps after installation are also staggered. In this way, the first clamps and second clamps have the most reasonable effect on the O-ring. More specifically, a top seat 11 is also installed on the driving end of the second rod 2. The peripheral wall surface of the top seat 11 is set as an upward conical surface 12. The second seat 5 is provided with a driving inclined surface 13. In conjunction with the conical surface 12, the second seat 5 moves radially outward within the second receiving groove 9, driven by the upward movement of the top seat 11. An elastic structure is also provided between the second receiving groove 9 and the second seat 5. The elastic structure forms a reverse action on the second seat 5. That is, the second seat 5 moves radially inward within the second receiving groove 9, driven by the release of potential energy by the elastic structure. At the same time, the elastic structure also provides a buffering effect during the radial outward movement of the second seat 5, so that the O-ring will not be damaged when the second clamp is opened.

[0033] In the above structure, the piston end of the second rod 3 is first moved upward in the lower cavity 6, thereby driving the top seat 11 on the driving end of the second rod 3 to move upward in the upper cavity 7. Since the peripheral wall surface of the top seat 11 is set as an upward conical surface 12, and the second seat 5 is provided with a driving inclined surface 13 that cooperates with the conical surface 12, and the second seat 5 can only move radially in the second receiving groove 9, the second seat 5 will move radially outward in the second receiving groove 9 under the upward movement of the top seat 11 and the cooperation of the elastic structure until it reaches the maximum stroke. The second clamp will then complete the radial opening of the O-ring. After the O-ring is radially opened, the product is placed in. Then, the piston end of the first rod 2 is moved upward in the lower cavity 6, thereby driving the driving end of the first rod 2 to move upward. Since the mounting arm 10 can only move axially in the first receiving groove 8, the first seat 4 is moved radially outward in the first rod 2. Driven by the upward movement of the driving end, the O-ring will move axially upward at the first receiving groove 8, thereby causing the first clamp to push the O-ring upward out of the first clamp. Then, the second clamp will push the O-ring into the sealing groove of the product along the outer wall surface. After installation, the piston ends of the first rod 2 and the second rod 3 will move downward, thereby driving the driving ends of the first rod 2 and the second rod 3 to move downward. The mounting arm 10 will move downward and reset to the first receiving groove 8 under the drive of the first seat 4. The top seat 11 will move downward and reset with the second rod 3. At the same time, the elastic structure will also cause the second seat 5 to move radially inward at the second receiving groove 9 and reset. Of course, the top seat 11 can also be achieved by the elastic structure driving the second seat 5. Therefore, the device with the above structure realizes the reliable installation of the O-ring, the overall operation is convenient, and it can ensure the accuracy and stability of the O-ring assembly and improve the sealing reliability.

[0034] In this embodiment, the elastic structure includes a first spring 14 and a first limiting post 15. A first mounting hole 16 is provided on the outer end face of the second base 5. The centerline of the first mounting hole 16 is parallel to the second base 5. The first spring 14 is installed in the first mounting hole 16 in the same direction. The first limiting post 15 is fixedly positioned relative to the opening of the first mounting hole 16. The first limiting post 15 forms abutment and limiting against the first spring 14, thus effectively limiting the position of the first spring 14 within the first mounting hole 16. A first limiting post 15 is fixedly installed at the opening of the mounting hole 16, which provides support and limiting function for the first spring 14, thereby enabling the first spring 14 to deform or return to its original state, and also realizing the installation limitation of the second seat 5. The center line of the first mounting hole 15 is set parallel to the center line of the second seat 5. More specifically, the center line of the first mounting hole 16 and the center line of the second seat 5 are set in the same plane. The use of the first spring 14 is reasonable, effectively ensuring the reliability of the cooperation between the second seat 5 and the top seat 11. The overall structural design is simple and reasonable.

[0035] In this embodiment, the first limiting post 15 is inserted into the corresponding position at the bottom of the second receiving groove 9. That is, an insertion hole is formed at the corresponding position at the bottom of the second receiving groove 9. A first clearance groove 17 is provided on the outer wall of the second base 5. The first clearance groove 17 is used to cooperate with the first limiting post 15. The first clearance groove 17 is connected to the first mounting hole 16, and the center lines of the two are located on the same plane. With the above structure, during installation, the first limiting post 15 can be pressed in along the first clearance groove 17 from the outside of the second base 5. After being pressed in, the first limiting post 15 will be restricted by the insertion hole. The first relief groove 17 is formed within the second receiving groove 9, which facilitates installation. At the same time, the first relief groove also allows the second seat 5 to move relative to the first limiting post 15. It also makes the center line of the first relief groove 17 and the center line of the first mounting hole 16 coplanar, which makes the interaction between the first limiting post 15 and the first spring 14 after installation more effective. A spring sleeve 18 is also provided in the first mounting hole 16. The spring sleeve 18 is positioned between the first limiting post 15 and the first spring 14. The setting of the spring sleeve 18 prevents the first spring 14 from coming out and makes the interaction between the first limiting post 15 and the first spring 14 more stable.

[0036] In this embodiment, a second mounting hole 19 is provided on the upper end face of the mounting arm 10. The center line of the second mounting hole 19 and the center line of the mounting arm 10 are located on the same plane. A third mounting hole 20 is provided on the upper end face of the second seat 5. The center line of the third mounting hole 20 and the center line of the second seat 5 are located on the same plane. The second mounting hole 19 and the third mounting hole 20 are provided. More specifically, the first seat 4 and the second seat 5 can be fixed by screws. The above design realizes the purpose of quick disassembly and installation of the first clamp and the second clamp on the first seat 4 and the second seat 5. The design is more reasonable. At the same time, multiple second mounting holes 19 and third mounting holes 20 can be provided, so that the corresponding second mounting hole 19 and third mounting hole 29 can be selected according to the O-ring of different sizes, which has a wide range of applications.

[0037] In this embodiment, the outer end of the second receiving groove 9 is through-hole, and the two sides of the second receiving groove 9 are provided with mounting grooves 21 extending along the center line of the second receiving groove 9. The two sides of the second seat 5 are provided with corresponding mounting protrusions 22, which cooperate with the mounting grooves 21. The cooperation between the mounting protrusions 22 and the mounting grooves 21 restricts the axial movement of the second seat 5, realizing the purpose that the second seat 5 can only move radially within the second receiving groove 9. At the same time, it makes the movement of the second seat 5 more stable and less prone to shaking. The structure is simple and reasonable. More specifically, the second receiving groove 9 with mounting grooves 21 is inverted T-shaped. It should be noted that the vertical part and the horizontal part are both equal diameter groove structures. The second seat 5 with mounting protrusions 22 is also inverted T-shaped. Therefore, the outer end of the second receiving groove 9 is made through-hole, so that when installing the second seat 5, it can be inserted along the outer opening of the second receiving groove 9, which also facilitates the installation.

[0038] In this embodiment, a second clearance groove 23 is also formed on the top seat 11. The second clearance groove 23 is arranged in a ring and is used to avoid the corresponding mounting arm 10. That is, the number of second clearance grooves 23 is the same as that of the mounting arm 10 and is arranged directly below the mounting arm 10. The arrangement of the second clearance groove 23 achieves the purpose of avoiding the mounting arm 10 when the top seat 11 moves upward without increasing the overall height of the cylinder 1 and the second seat 5. This makes the design of the device more reasonable and occupies less space.

[0039] In this embodiment, a second limiting post 24 is fixedly installed at the bottom of the upper cavity 7 of the cylinder 1. The upper end of the second limiting post 24 moves through the top seat 11. More specifically, the second limiting post 24 is also arranged in a circumferential manner, and an insertion hole is formed below the second clearance groove 23 on the top seat 11. The upper end of the second limiting post 24 slides with the insertion hole on the top seat 11. An insertion hole is also formed at the corresponding position of the cylinder 1. The lower end of the second limiting post 24 is fixedly set with the insertion hole on the cylinder 1. In this way, the top seat 11 can slide with the second limiting post 24 under the drive of the second rod 3, thereby effectively preventing the top seat 11 from shaking and making the movement of the top seat 11 under the drive of the second rod 3 more reasonable.

[0040] In this embodiment, the cylinder body 1 includes an upper cylinder seat 25 and a lower cylinder seat 26. The upper cylinder seat 25 is fixed to the lower cylinder seat 26 by screws. An upper cavity 7, a first receiving groove 8, and a second receiving groove 9 are formed on the upper cylinder seat 25, and a lower cavity 6 is formed on the lower cylinder seat 26. The cylinder body 1 adopts a split structure, which allows the upper cylinder seat 25 with the upper cavity 7 and the lower cylinder seat 26 with the lower cavity 6 to be processed by different processes, facilitating molding and processing.

[0041] In this embodiment, the lower cylinder seat 26 also has a first air hole 27 and a second air hole 28. The first air hole 27 is positioned below the piston end of the first rod 2, and the second air hole 28 is positioned between the piston end of the first rod 2 and the piston end of the second rod 3. A second spring 29 is also provided between the top of the lower cavity 6 and the piston end of the second rod 3. It should be noted that the distance between the second air hole 28 and the piston end of the first rod 2 is greater than the travel of the piston end of the first rod 2. The arrangement of the first air hole 27 and the second air hole 28 allows the piston end of the second rod 3 to move upward in the lower cavity 6 and the piston end of the first rod 2 to remain stationary or move downward in the lower cavity 6 by allowing air to enter through the second air hole 28. When air is introduced, the piston end of the first rod 2 moves upward in the lower chamber 6. The second spring 29 allows the piston end of the second rod 3 to move downward and reset in the lower chamber 6, while also buffering the piston end of the second rod 3. The structure is reasonably designed. More specifically, when air is introduced for the first time through the second air hole 28, the piston end of the first rod 2 remains stationary in the lower chamber 6, and the piston end of the second rod 3 moves upward against the elastic force of the second spring 29. When air is introduced through the first air hole 27, the piston end of the first rod 2 moves upward in the lower chamber 6. When air is introduced through the second air hole 28 for the second time, the piston end of the second rod 2 moves downward and reset in the lower chamber 6. When air is discharged through the second air hole 28, the second spring 29 releases its elastic force and drives the piston end of the second rod 3 to reset.

[0042] In this embodiment, the lower cylinder seat 26 also has a third air hole 30, which is positioned above the piston end of the second rod 3. It should be noted that the distance between the third air hole 30 and the piston end of the second rod 3 is greater than the travel of the piston end of the second rod 3. When the piston end of the second rod 3 moves upward, the gas in the lower chamber 6 above the piston end of the second rod 3 is discharged from the third air hole 30. When the piston end of the second rod 3 needs to move downward, gas can be discharged from the third air hole 30 to form a reset effect on the piston end of the second rod 3 together with the second spring 29.

[0043] In this embodiment, a locking ring groove is provided at the corresponding position of the lower cavity 6. The locking ring groove is used to install the limiting snap ring 31. The limiting snap ring 31 is set on the lower side of the piston end of the second rod 3. The limiting snap ring 31 limits the position of the piston end of the second rod 3. At the same time, the second air hole 28 is set on the lower side of the locking ring groove.

[0044] In this embodiment, a lower cylinder head 32 is provided at the upper end of the lower cylinder seat 26, which facilitates installation.

[0045] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.

Claims

1. An O-ring assembly device, characterized in that: The cylinder includes a cylinder body (1), an inner and outer first rod (2) and a second rod (3), a first seat (4) and a second seat (5). The cylinder body (1) has a communicating lower cavity (6) and an upper cavity (7). The piston ends of the second rod (3) and the first rod (2) are spaced vertically at the lower cavity (6). The driving end of the first rod (2) extends from the upper cavity (7) above the driving end of the second rod (3). The upper part of the upper cavity (7) is also through-connected. The upper end face of the cylinder body (1) is also provided with a first receiving groove (8) and a second receiving groove (9). The first receiving groove (8) and the second receiving groove (9) are both connected to the upper cavity (7) and are arranged in a circumferential staggered manner. The middle part of the first seat (4) is connected to the upper cavity (5). The driving end of the first rod (2) is fixedly connected. The peripheral wall of the first seat (4) is provided with mounting arms (10) arranged in a circumferential direction. The mounting arms (10) cooperate with the corresponding first receiving groove (8) and can only move axially. The second seat (5) cooperates with the corresponding second receiving groove (9) and can only move radially. The driving end of the second rod (3) is also provided with a top seat (11). The peripheral wall of the top seat (11) is set as an upward conical surface (12). The second seat (5) is provided with a driving inclined surface (13). The driving inclined surface (13) cooperates with the conical surface (12). An elastic structure is also provided between the second receiving groove (9) and the second seat (5). The elastic structure forms a reverse action on the second seat (5).

2. The O-ring assembly device according to claim 1, characterized in that: The elastic structure includes a first spring (14) and a first limiting post (15). The outer end face of the second seat (5) is provided with a first mounting hole (16). The center line of the first mounting hole (16) is arranged parallel to the second seat (5). The first spring (14) is installed in the first mounting hole (16) in the same direction. The first limiting post (15) is fixedly arranged relative to the opening of the first mounting hole (16). The first limiting post (15) forms a stop and limit on the first spring (14).

3. The O-ring assembly device according to claim 2, characterized in that: The first limiting post (15) is inserted at the corresponding position at the bottom of the second receiving groove (9). The outer side wall of the second seat (5) is provided with a first clearance groove (17). The first clearance groove (17) is used to cooperate with the first limiting post (15). The first clearance groove (17) is connected to the first mounting hole (16) and the center lines of the two are located on the same plane. A spring sleeve (18) is also provided in the first mounting hole (16). The spring sleeve (18) is arranged between the first limiting post (15) and the first spring (14).

4. The O-ring assembly device according to claim 1, characterized in that: The upper end face of the mounting arm (10) is provided with a second mounting hole (19), the center line of the second mounting hole (19) and the center line of the mounting arm (10) are located on the same plane, and the upper end face of the second seat (5) is provided with a third mounting hole (20), the center line of the third mounting hole (20) and the center line of the second seat (5) are located on the same plane.

5. An O-ring assembly device according to claim 1, characterized in that: The outer end of the second receiving groove (9) is through, and the two sides of the second receiving groove (9) are provided with mounting grooves (21). The mounting grooves (21) are provided along the center line of the second receiving groove (9). The two sides of the second base (5) are provided with corresponding mounting protrusions (22), and the mounting protrusions (22) cooperate with the mounting grooves (21).

6. An O-ring assembly device according to claim 1, characterized in that: A second clearance groove (23) is also formed on the top seat (11). The second clearance groove (23) is arranged in a circumferential direction and is used to form clearance for the corresponding mounting arm (10).

7. An O-ring assembly device according to claim 1, characterized in that: The cylinder body (1) is also fixedly installed with a second limiting post (24) at the bottom of the upper cavity (7), and the upper end of the second limiting post (24) moves through the top seat (11).

8. An O-ring assembly device according to any one of claims 1-7, characterized in that: The cylinder body (1) includes an upper cylinder seat (25) and a lower cylinder seat (26). The upper cylinder seat (25) is fixed to the lower cylinder seat (26) by a screw. The upper cavity (7), the first receiving groove (8), and the second receiving groove (9) are formed on the upper cylinder seat (25). The lower cavity (6) is formed on the lower cylinder seat (26). The lower cylinder seat (26) also has a first air hole (27) and a second air hole (28). The first air hole (27) is disposed on the lower side of the piston end of the first rod (2). The second air hole (28) is disposed between the piston end of the first rod (2) and the piston end of the second rod (3). A second spring (29) is also provided between the top of the lower cavity (6) and the piston end of the second rod (3).

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