Stop ring riveting clamp and riveting device

Abstract

The invention is suitable for the technical field of shock absorbers, and provides a check ring riveting clamp which is used for riveting and clamping a piston rod and a check ring and is characterized in that the check ring riveting clamp comprises a check ring seat, a supporting block, a supporting seat and a main adjusting cushion block, the front end of the supporting block is arranged on the check ring seat in a sleeving mode, the tail end of the supporting block is arranged on the supporting seat in a sleeving mode, and the supporting block and the supporting seat abut against each other in a limiting mode; one end of the supporting seat is arranged on the limiting seat in a sleeved mode, the periphery of the supporting seat is sleeved with a reset spring, and the two ends of the reset spring abut against the limiting seat and the supporting seat respectively. The main adjusting cushion block is arranged in the supporting block; a pressure absorption spring is arranged at the bottom of the main adjusting cushion block; the check ring is arranged on the check ring base, and the piston rod penetrates through the check ring and the check ring base, is arranged in an inner cavity of the supporting block in a sleeved mode and abuts against the main adjusting cushion block. By means of the check ring riveting clamp, deviation can be compensated and abdicated through the pressure absorption spring, and the relative position of the piston rod and the check ring is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of shock absorbers, and in particular relates to a retaining ring riveting fixture and a riveting device. Background Art

[0002] The piston rod retaining ring plays a vital role in the shock absorber. It not only prevents the piston rod from coming out, seals and prevents dust, but also maintains structural stability and facilitates installation and maintenance. Selecting the right retaining ring and installing and using it correctly can improve the performance and reliability of the shock absorber and extend its service life.

[0003] Currently, commonly used installation methods for piston rods and retaining rings include retaining spring type fixing method, welding fixing method, threaded connection fixing method and interference fit fixing method, etc. However, these methods have more or less some problems when using the piston rod, such as low efficiency in mass production, difficulty in cleaning up debris in the gap after welding, resulting in attenuation of shock absorber function, and failure to ensure the accuracy of the retaining ring position, etc. Therefore, the prior art also proposes to install the piston rod and retaining ring through riveting technology.

[0004] In the prior art, when the piston rod and the retaining ring are riveted, the piston rod needs to be inserted into the fixed lower tooling hole, and then a wear-resistant ring is embedded to avoid scratching the surface of the rod body and causing the risk of oil leakage. The pressing force during the riveting process mainly comes from the servo actuator. Since the power of the servo actuator-related equipment is relatively large, the pressing force value is relatively large, which may cause the pressing riveting position to shift, resulting in a slightly insufficient accuracy of the pressing riveting position.

[0005] If you want to achieve the ideal riveting effect to ensure the accuracy of the riveting position, you need to improve the strength of the tooling and parts, and at the same time, the tooling processing accuracy and requirements will be greatly improved. However, how to ensure the accuracy of the riveting position without improving the tooling processing accuracy is a problem that needs to be solved in this application. Summary of the invention

[0006] The invention provides a retaining ring riveting fixture, aiming to solve the problem of how to ensure the accuracy of the riveting position during the riveting process.

[0007] The present invention is implemented as follows. In the first aspect, the present application provides a retaining ring riveting fixture for riveting and clamping a piston rod and a retaining ring. The retaining ring riveting fixture comprises a retaining ring seat, a support block, a support seat and a main adjustment pad. The front end of the support block is sleeved on the retaining ring seat, and the rear end is sleeved on the support seat, and they are mutually limited and abutted; One end of the support seat is sleeved on the limit seat, a return spring is sleeved on the outer periphery of the support seat, and two ends of the return spring abut against the limit seat and the support seat respectively; The main adjustment pad is arranged in the support block; a pressure absorbing spring is arranged at the bottom of the main adjustment pad; The retaining ring is arranged on the retaining ring seat, and the piston rod passes through the retaining ring and the retaining ring seat, and is sleeved in the inner cavity of the support block and abuts against the main adjustment pad.

[0008] Furthermore, the retaining ring riveting fixture also includes a secondary adjustment pad, which is located in the support block and abuts against two ends of the pressure absorbing spring together with the main adjustment pad.

[0009] Furthermore, a pull rod is provided at the bottom of the secondary adjustment pad, the pull rod is located inside the support block and abuts against the support block in a limiting manner, and a yield spring is provided on the periphery of the pull rod, and both ends of the pull rod respectively abut against the secondary adjustment pad and the yield spring.

[0010] Furthermore, a limiting ring is arranged on the top of the pull rod, one end of the yield spring abuts against the limiting ring, and the other end abuts against the limiting boss arranged inside the support block.

[0011] Furthermore, the support seat is provided with a through hole along the axial direction, the outer wall of the support block is provided with a first limiting portion, and the portion from the first limiting portion to the tail end is sleeved in the through hole and abuts against the inner wall of the support seat; The top edge of the support seat abuts against the first limiting portion, so that the support block presses against the support seat when pressed downward by force; A through hole is arranged inside the support block, the main adjustment pad is sleeved on the through hole at the rear end of the support block and contacts the inner wall of the support block, and the top of the adjustment pad contacts the rear end of the piston rod through a second limiting portion; A through hole and an installation groove are arranged in the retaining ring seat, the front end of the support block is inserted into the installation groove, the through holes of the retaining ring seat and the support block are arranged on the same axis, and the piston rod is arranged in the through holes of the retaining ring seat and the support block.

[0012] Furthermore, a scratch-resistant lining is provided in a contact area between the retaining ring seat and the piston rod near the retaining ring, and a scratch-resistant lining is provided in a contact area between the support block and the piston rod.

[0013] Furthermore, the pressure absorbing spring is a disc spring, and the return spring and the yield spring are both compression springs.

[0014] Furthermore, a limit ring is arranged around the outer periphery of the support seat, and the return spring abuts against the limit ring.

[0015] Furthermore, the contact surface stress domains of the retaining ring seat and the stop ring are both formed by processing of high-hardness materials.

[0016] In the second aspect, the present application further discloses a stop ring riveting device, which includes a connecting rod, a rivet head and the stop ring riveting fixture disclosed in the first aspect, wherein one end of the connecting rod is connected to a riveting machine, and the other end is fixedly connected to the rivet head through a fixing pin; wherein, The riveted joint comprises a fixing area and a force-bearing area in a cylindrical structure, the fixing area is smaller than the force-bearing area, and the fixing area is plugged into the mounting groove of the connecting rod; The force bearing area is provided with a guide surface, an avoidance hole and a pin hole, the guide surface and the avoidance hole are both contoured polishing structures, and the riveted joint is matched with the piston rod in a micro-clearance.

[0017] Furthermore, the stop ring riveting device also includes a blowing structure, and the blowing nozzle of the blowing structure faces the stop ring.

[0018] Beneficial effects achieved by the present invention: The present application discloses a stop ring riveting fixture and a riveting device, wherein the stop ring riveting fixture includes a stop ring seat, a support block, a support seat and a main adjustment pad, the front end of the support block is sleeved on the stop ring seat, the rear end is sleeved on the support seat, and they are limited and abutted against each other; one end of the support seat is sleeved on the limit seat, a return spring is sleeved on the outer periphery of the support seat, and the two ends of the return spring respectively abut against the limit seat and the support seat; and the main adjustment pad is arranged in the support block; a pressure absorbing spring is arranged at the bottom of the main adjustment pad; the stop ring is arranged on the stop ring seat, the piston rod passes through the stop ring and the stop ring seat, and is sleeved in the inner cavity of the support block and abuts against the main adjustment pad. The rivet head is pressed down to the stop ring by the servo electric cylinder, and the end face of the stop ring is riveted by the end of the rivet head. When the rivet head is pressed down, the piston rod and the stop ring transmit the pressure to the bottom, and the retaining ring seat transmits the pressure to the support block. The piston rod transmits the pressure to the main adjustment pad in the inner cavity of the support block through the inner cavity of the retaining ring seat and the support block, and buffers it through the pressure absorbing spring arranged under the main adjustment pad. The pressure absorbing spring can compensate for the position and pressure absorption of the stop ring; at the same time, the retaining ring seat, the support block and the support seat are pressed down in turn on the outside and limit the buffering; the stop ring riveting fixture as a whole is buffered and pressed down from the inside and outside at the same time, ensuring that the piston rod and the stop ring are more stable in the vertical direction and will not change, thereby ensuring the riveting accuracy and quality of the product.

[0019] Therefore, when the position of the retaining ring and the piston rod deviates, the retaining ring riveting fixture can compensate for the deviation through the pressure absorbing spring and make way for it, thereby ensuring the relative position of the piston rod and the retaining ring.

[0020] Moreover, the retaining ring riveting fixture disclosed in the present application is also provided with a secondary adjustment pad, a displacement spring, a pull rod and a reset spring. The secondary adjustment pad is located in the support block and abuts against the two ends of the pressure absorbing spring with the main adjustment pad, the pull rod is arranged in the support block and abuts against the support block, and a displacement spring is arranged on the outer periphery of the pull rod, and a reset spring is arranged between the support seat and the limit seat. When the riveting head is pressed down. The piston rod and the retaining ring transmit the pressure to the bottom, and transmit the pressure to the main adjustment pad in the inner cavity of the support block, and the pressure absorbing spring arranged under the main adjustment pad is used for buffering. The pressure absorbing spring can compensate for the position and pressure absorption of the retaining ring, and the reset spring is compressed during the downward movement of the support seat, and the displacement spring is also compressed during the downward movement of the secondary adjustment pad, thereby realizing partial pressure absorption and position adjustment. After the press-fitting is completed, the reset spring and the displacement spring unload the force and move upward, so that the rivet head performs rivet work on other piston rods and retaining rings. Thereby improving the work efficiency and the riveting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of a retaining ring riveting fixture provided in the present application.

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of a retaining ring riveting fixture provided in the present application.

[0025] Figure 3 It is a schematic diagram of the partial cross-sectional structure of a retaining ring riveting fixture provided in the present application.

[0026] Figure 4 It is a structural schematic diagram of a retaining ring riveting device provided in the present application.

[0027] Figure 5 This is a schematic diagram of a riveted joint structure provided by the present application.

[0028] Reference numerals: Connecting rod, 2-riveted joint, 3-piston rod, 31-second limiting part, 4-blowing structure, 5-stop ring, 6-retaining ring seat, 7-support block, 71-first limiting part, 8-support seat, 81-limit retaining ring, 9-main adjustment pad, 10-reset spring, 11-pressure absorbing spring, 12-secondary adjustment pad, 13-pull rod, 14-yield spring, 15-limiting seat. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] In order to effectively illustrate the embodiments of the present invention, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1 and Figure 2 , combined with the three-dimensional structure of the stop ring riveting fixture and the cross-sectional structure diagram of the stop ring riveting fixture.

[0032] like Figure 1 and Figure 2 The retaining ring riveting fixture is used for riveting and clamping the piston rod 3 and the retaining ring 5, and includes a retaining ring seat 6, a support block 7, a support seat 8 and a main adjustment pad 9. Through holes are respectively arranged inside the retaining ring seat 6, the support block 7 and the support seat 8. The piston rod 3 is sleeved in the through holes of the retaining ring seat 6 and the support block 7. At the same time, the front end of the support block 7 is sleeved in the retaining ring seat 6, and the rear end is sleeved in the support seat 8, and they are mutually limited and abutted.

[0033] Furthermore, the support seat 8 is provided with a through hole along the axial direction, and the outer wall of the support block 7 is provided with a first limit portion 71, and the first limit portion 71 to the tail end is sleeved in the through hole and abuts against the inner wall of the support seat 8. The structure of the support block 7 and the position of the integral retaining ring riveting fixture play a role of connecting the upper and lower parts, which can not only bear the downward pressure from the top piston rod 3 and the retaining ring seat 6, but also transmit the downward pressure to the support seat 8 below.

[0034] The top edge of the support seat 8 abuts against the first limiting portion 71 of the outer wall of the support block 7, so that the support block 7 presses against the support seat 8 when it is pressed downward by force. A through hole is arranged inside the support block 7. The main adjustment pad 9 is sleeved on the through hole at the rear end of the support block 7 and abuts against the inner wall of the support block 7. The top of the main adjustment pad 9 abuts against the rear end of the piston rod 3 through the second limiting portion 31; a through hole and an installation groove are arranged in the retaining ring seat 6, and the front end of the support block 7 is inserted into the installation groove. The through holes of the retaining ring seat 6 and the support block 7 are arranged on the same axis, and the piston rod 3 is arranged in the through holes of the retaining ring seat 6 and the support block 7.

[0035] From the above description, it can be seen that in the structure of the retaining ring riveting fixture provided by the present application, a limiting structure is set through the outer walls of the retaining ring seat 6, the support block 7 and the support seat 8, so that when the rivet head 2 is pressed down, the piston rod 3 and the retaining ring 5 are pressed down, driving the retaining ring seat 6 to be pressed down, and the limiting portion of the outer wall of the retaining ring seat 6 abuts against the support block 7, so that the support block 7 is pressed down, and the first limiting portion 71 of the support block 7 abuts against the support seat 8, so that the support seat 8 is pressed down, thereby transmitting the pressure of the rivet head 2 downward.

[0036] See also Figure 3 , is another cross-sectional structural diagram of a retaining ring riveting fixture provided by the present application. The bottom end of the support seat 8 is sleeved on the limit seat 15, and the outer periphery of the support seat 8 is sleeved with a return spring 10, and the two ends of the return spring 10 abut against the limit seat 15 and the support seat 8 respectively.

[0037] A pressure absorbing spring 11 is arranged at the bottom end of the main adjustment pad 9; the stop ring 5 is arranged on the retaining ring seat 6, and the piston rod 3 passes through the stop ring 5 and the retaining ring seat 6, and is sleeved in the inner cavity of the support block 7 and abuts against the main adjustment pad 9. The main adjustment pad 9 is arranged in the support block 7, and the top end is sleeved on the bottom periphery of the piston rod 3. Therefore, the piston rod 3 can transmit the downward pressure to the main adjustment pad 9 in the inner cavity of the support block 7, and the main adjustment pad 9 transmits the downward pressure to the pressure absorbing spring 11, so that the pressure absorbing spring 11 buffers the downward pressure.

[0038] A circle of limit ring 81 is arranged around the outer periphery of the support seat 8, and the return spring 10 abuts against the limit ring 81. When the support seat 8 is subjected to downward pressure, the pressure is transmitted to the return spring 10 through the limit ring 81. At the same time, the return spring 10 abuts against the limit seat 15, so that the return spring 10 is buffered between the limit seat 15 and the limit ring 81 of the support seat 8.

[0039] The retaining ring riveting fixture also includes a secondary adjustment pad 12, which is located in the support block 7 and is arranged at the bottom of the pressure absorbing spring 11. It abuts against the two ends of the pressure absorbing spring 11 with the main adjustment pad 9 respectively, and can further buffer the downward pressure after the pressure absorbing spring 11 buffers.

[0040] In the embodiment provided by the present application, in addition to setting a limiting portion on the outside of the retaining ring seat 6, the support block 7 and the support seat 8, a through hole is also set inside the retaining ring seat 6, the support block 7 and the support seat 8, and the piston rod 3 is sleeved in the retaining ring seat 6 and the support block 7. The second limiting portion 31 set on the piston rod 3 abuts against the main adjustment pad 9, so that when the piston rod 3 is pressed down, it abuts against the main adjustment pad 9 to press down.

[0041] A pressure absorbing spring 11 is arranged between the primary adjustment pad 9 and the secondary adjustment pad 12, and a reset spring 10 is arranged between the limit seat 15 and the support seat 8, so that the downward pressure from the riveting head 2 can simultaneously absorb and compensate the position and pressure of the stop ring 5 in the inner cavity and outer wall of the stop ring riveting fixture, and limit and buffer. Among them, the pressure absorbing spring 11 can be a disc spring, which can effectively realize pressure compensation and prevent overpressure.

[0042] When the main adjustment pad 9 is pressed down, the pressure absorbing spring 11 transmits the absorbed excess pressure to the secondary adjustment pad 12. A pull rod 13 is provided at the bottom of the secondary adjustment pad 12. The pull rod 13 is located inside the support block 7 and is limitedly abutted against the support block 7. A yield spring 14 is provided on the periphery of the pull rod 13. The two ends of the pull rod 13 respectively abut against the secondary adjustment pad and the yield spring 14. A limit ring is provided at the top of the pull rod 13. One end of the yield spring 14 abuts against the limit ring, and the other end abuts against the limit boss provided inside the support block 7.

[0043] The arrangement of the pull rod 13 and the yield spring 14 can further transmit the pressure that the pressure absorbing spring 11 cannot absorb to the yield spring 14, so that the downward pressure of the riveted head 2 is further buffered and absorbed. Among them, the return spring 10 and the yield spring 14 can both be compression springs.

[0044] The contact area between the retaining ring seat 6 and the piston rod 3 near the stop ring 5 is provided with an anti-scratch lining, and the contact area between the support block 7 and the piston rod 3 is provided with an anti-scratch lining. The anti-scratch lining can prevent the inner side of the mouth where the retaining ring seat 6 and the piston rod 3 are connected from being scratched by the piston rod 3.

[0045] The contact surface stress domains of the retaining ring seat 6 and the stop ring 5 are both formed by processing of high-hardness material, which can further prevent the inner side of the mouth of the retaining ring seat 6 from being scratched by the piston rod 3.

[0046] It can be known from the embodiment structure provided in the above content that the retaining ring riveting fixture can achieve the buffering and absorption of the external pressure of the fixture by the retaining ring seat 6, the support block 7, the support seat 8 and the limit seat 15 abutting each other from top to bottom, and setting the reset spring 10 between the support seat 8 and the limit seat 15. At the same time, the retaining ring seat 6, the support block 7, the support seat 8 and the limit seat 15 are sleeved and abutted inside, and the main adjustment pad 9 and the secondary adjustment pad 12 are set in the inner cavity of the support block 7, and the pressure absorbing spring 11 is set between the main adjustment pad 9 and the secondary adjustment pad 12, which can achieve the buffering and absorption of the pressure under the riveting head 2 inside the fixture, thereby ensuring that the piston rod 3 and the retaining ring 5 are more stable in the vertical direction, and can be quickly riveted and ensure the riveting accuracy and quality.

[0047] The present application also provides another retaining ring riveting device, such as Figure 4 and Figure 5 As shown, Figure 4is a structural schematic diagram of a retaining ring riveting device provided by the present application, Figure 5 It is a structural schematic diagram of a riveted joint provided in this application.

[0048] like Figure 4 and Figure 5 As shown, the retaining ring riveting device comprises a connecting rod 1, a riveting head 2 and the retaining ring riveting fixture provided in the above embodiment, one end of the connecting rod 1 is connected to a riveting machine (specifically, it can be a servo electric cylinder of the riveting machine), and the other end is fixedly connected to the riveting head 2 through a fixing pin; wherein, The rivet head 2 includes a fixed area and a force-bearing area in a cylindrical structure. The size of the fixed area is smaller than that of the force-bearing area, and the fixed area is inserted into the mounting groove of the connecting rod 1; the force-bearing area is provided with a guide surface, an avoidance hole and a pin hole, and the guide surface and the avoidance hole are both contoured polishing structures, and the rivet head 2 and the piston rod 3 are matched with a micro-gap.

[0049] For specific implementation, please refer to Figure 4 As shown, the stop ring riveting device also includes a blowing structure 4, the blowing nozzle of which is directly facing the stop ring 5, so as to ensure that the dust or debris generated by the riveting head 2 when the riveting machine is driven to press down is blown away by the blowing structure 4, so as to avoid the debris and dust from affecting the quality of the formed stop ring. Of course, the specific structure of the blowing structure 4 is not elaborated in detail here.

[0050] In addition, in the specific implementation process, the limit seat 15 can be evenly arranged on the turntable (not shown in the accompanying drawings), or a plurality of the limit seats 15 can be arranged on the turntable, so that after completing the riveting action of the previous piston rod 3 and the retaining ring 5, the turntable is moved to the next workstation (that is, the piston rod 3 and pre-installed in the limit seat 15), and the riveting action is repeated to cycle the processing.

[0051] The stop ring riveting device adopted in the present application is described in detail as including a connecting rod 1, a rivet head 2 and a stop ring riveting fixture, which is connected to the riveting machine through the connecting rod 1, and the rivet head 2 and the connecting rod 1 are fixed by a fixing pin, so that the stop ring 5 is placed on the retaining ring seat 6, and then in the process of pressing the rivet head 2 down, the rivet head 2 is pressed down to the retaining ring seat 6 by the servo electric cylinder, and the end structure of the rivet head 2 rivets the end face of the stop ring 5 through the micro-clearance cooperation between the rivet head 2 and the piston rod 3 and the contoured polishing structure design of the guide surface and the avoidance hole. If the position deviation of the retaining ring groove of the piston rod 3 is large, the pressure absorbing spring 11 will give way within a certain range to ensure the relative position of the stop ring 5 and the piston rod 3, and at the same time ensure that the piston rod 3 and the stop ring 5 will not change in the vertical direction after being subjected to force, thereby ensuring the riveting quality of the product. The pull-off force of this riveting method is greatly enhanced, exceeding the pull-off force of fixing methods such as welding and interference fit. Due to the characteristics of its processing technology, the relative position of the piston rod 3 and the retaining ring 5 is fixed, and there is no risk of abnormal function or loss due to shock absorber oil contamination. At the same time, the assembly efficiency is high and it is suitable for mass production.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A retaining ring riveting fixture, used for riveting and clamping a piston rod (3) and a retaining ring (5), characterized in that: It comprises a retaining ring seat (6), a support block (7), a support seat (8) and a main adjustment pad (9), wherein the front end of the support block (7) is sleeved on the retaining ring seat (6), and the rear end is sleeved on the support seat 8 (8), and the two are mutually limited and abutted; One end of the support seat (8) is sleeved on the limit seat (15), a return spring (10) is sleeved on the outer periphery of the support seat (8), and two ends of the return spring (10) respectively abut against the limit seat (15) and the support seat (8); The main adjustment pad (9) is arranged in the support block (7); a pressure absorbing spring (11) is arranged at the bottom of the main adjustment pad (9); The retaining ring (5) is arranged on the retaining ring seat (6), and the piston rod (3) passes through the retaining ring (5) and the retaining ring seat (6), and is sleeved in the inner cavity of the support block (7) and abuts against the main adjustment pad (9).

2. The retaining ring riveting fixture according to claim 1, characterized in that: The retaining ring riveting fixture further comprises a secondary adjustment pad (12), the secondary adjustment pad (12) being located in the support block (7) and respectively abutting against two ends of the pressure absorbing spring (11) together with the primary adjustment pad (9).

3. The retaining ring riveting fixture according to claim 2, characterized in that: A pull rod (13) is provided at the bottom of the secondary adjustment pad (12), the pull rod (13) is located inside the support block (7) and is in limited contact with the support block (7), and a yield spring (14) is provided on the periphery of the pull rod (13), and two ends of the pull rod (13) respectively abut against the secondary adjustment pad (12) and the yield spring (14).

4. The retaining ring riveting fixture according to claim 3, characterized in that: A limiting ring is arranged at the top of the pull rod (13); one end of the allowance spring (14) abuts against the limiting ring, and the other end abuts against a limiting boss arranged inside the support block (7).

5. The retaining ring riveting fixture according to claim 1, characterized in that: The support seat (8) is provided with a through hole along the axial direction, and the outer wall of the support block (7) is provided with a first limiting portion (71), and the portion from the first limiting portion (71) to the rear end is sleeved in the through hole and abuts against the inner wall of the support seat (8); The top edge of the support seat (8) abuts against the first limiting portion (71), so that the support block (7) presses against the support seat (8) when pressed downward by force; A through hole is provided inside the support block (7); the main adjustment pad (9) is sleeved on the through hole at the rear end of the support block (7) and contacts the inner wall of the support block (7); the top of the main adjustment pad (9) contacts the rear end of the piston rod (3) via a second limiting portion (31); A through hole and a mounting groove are provided in the retaining ring seat (6), the front end of the support block (7) is inserted into the mounting groove, the through holes of the retaining ring seat (6) and the support block (7) are arranged on the same axis, and the piston rod (3) is arranged in the through holes of the retaining ring seat (6) and the support block (7).

6. The retaining ring riveting fixture according to claim 5, characterized in that: A scratch-resistant lining is provided in the contact area between the retaining ring seat (6) close to the stop ring (5) and the piston rod (3), and a scratch-resistant lining is provided in the contact area between the support block (7) and the piston rod (3).

7. The retaining ring riveting fixture according to claim 4, characterized in that: The pressure absorbing spring (11) is a disc spring, and the return spring (10) and the yield spring (14) are both compression springs.

8. The retaining ring riveting fixture according to claim 1, characterized in that: A limit stop ring (81) is disposed around the outer periphery of the support seat (8), and the return spring (10) abuts against the limit stop ring (81).

9. A retaining ring riveting device, characterized in that: It comprises a connecting rod (1), a rivet head (2) and a retaining ring riveting fixture as claimed in any one of claims 1 to 8, wherein one end of the connecting rod (1) is connected to a riveting machine, and the other end is fixedly connected to the rivet head (2) via a fixing pin; wherein: The riveted joint (2) comprises a fixing area and a force-bearing area in a cylindrical structure, the fixing area is smaller than the force-bearing area, and the fixing area is plugged into the mounting groove of the connecting rod (1); The force bearing area is provided with a guide surface, an avoidance hole and a pin hole, the guide surface and the avoidance hole are both contoured polished structures, and the riveted joint (2) and the piston rod (3) are matched with a micro-clearance.

10. The retaining ring riveting device according to claim 9, characterized in that: The stop ring riveting device further comprises a blowing structure (4), wherein the blowing nozzle of the blowing structure (4) faces the stop ring (5).

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