Stop ring riveting clamp and riveting device

Abstract

The utility model is applicable to the technical field of shock absorbers, and provides a check ring riveting clamp and a riveting device, which are used for riveting and clamping a piston rod and a check ring, and are characterized in that the check ring riveting clamp comprises a check ring seat, a support block, a support seat and a main adjusting cushion block, the front end part of the support block is sleeved on the check ring seat, the tail end part of the support block is sleeved on the support seat, and the main adjusting cushion block is sleeved on the support seat. The limiting blocks abut against each other in a limiting manner; 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 utility model belongs to the technical field of damper, especially relates to a stop circle riveting clamp and riveting device. BACKGROUND

[0002] The piston rod retaining ring plays a vital role in the damper, which can not only prevent the piston rod from falling out, sealing and dust prevention, but also maintain the structural stability, facilitate installation and maintenance. Selecting a suitable retaining ring and correctly installing and using it can improve the performance and reliability of the damper and prolong its service life.

[0003] The current commonly used installation methods of the piston rod and the retaining ring include the snap spring type fixing method, the welding fixing method, the threaded connection fixing method and the interference fit fixing method, etc. However, these methods have more or less problems when the piston rod is used, such as low efficiency in batch production, difficulty in cleaning the debris in the joint gap after welding, which leads to the attenuation of the damper function, and the inability to guarantee the accuracy of the retaining ring position, etc. Therefore, the prior art also proposes to realize the installation of the piston rod and the 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 tool hole, and then the wear-resistant ring is embedded to avoid scratching the surface of the rod body and causing the risk of oil leakage. The pressing force in the riveting process mainly comes from the servo actuator. Since the power of the servo actuator related equipment is large, the riveting force value is large, which may cause the riveting position to deviate, resulting in insufficient riveting position accuracy.

[0005] If the ideal riveting effect is to be achieved to guarantee the accuracy of the riveting position, the strength of the tool and the parts needs to be improved, and the tool processing accuracy and requirements will be greatly improved. However, how to guarantee the accuracy of the riveting position without improving the tool processing accuracy is a problem to be solved by the present application. UTILITY MODEL CONTENTS

[0006] The utility model provides a kind of stop circle riveting clamp, to solve how to guarantee riveting position accuracy in the process of riveting.

[0007] The utility model is implemented as follows, first, the present application provides a kind of stop circle riveting clamp, for the riveting clamping of piston rod and stop circle, this stop circle riveting clamp includes retaining ring seat, support block, support seat and main adjusting pad block, the support block front end portion is set in the retaining ring seat, tail end portion is set in the support seat, and is limited to abut mutually;

[0008] One end of the support seat is set in the limiting seat, a reset spring is set on the outer periphery of the support seat, and the two ends of the reset spring abut against the limiting seat and the support seat respectively;

[0009] and the main adjusting pad is arranged in the support block; the bottom of the main adjusting pad is provided with a pressure absorbing spring;

[0010] The stop ring is arranged on the check ring seat, the piston rod penetrates the stop ring and the check ring seat, and is sleeved in the inner cavity of the support block and abuts against the main adjusting pad.

[0011] Further, the stop ring riveting clamp further comprises a secondary adjusting pad, the secondary adjusting pad is located in the support block, and the main adjusting pad and the secondary adjusting pad respectively abut against two ends of the pressure absorbing spring.

[0012] Further, the bottom of the secondary adjusting pad is provided with a pull rod, the pull rod is located in the support block and abuts against the support block in position, and the pull rod is provided with a give spring around the outer periphery, and two ends of the pull rod abut against the secondary adjusting pad and the give spring respectively.

[0013] Further, the top of the pull rod is provided with a limiting ring, one end of the give spring abuts against the limiting ring, and the other end abuts against a limiting boss arranged in the inner part of the support block.

[0014] Further, the support seat is provided with a through hole in the axial direction, the outer wall of the support block is provided with a first limiting part, and the first limiting part is sleeved in the through hole and abuts against the inner wall of the support seat from the tail end;

[0015] The top edge of the support seat abuts against the first limiting part, so that the support block abuts against the support seat when the support block is pressed;

[0016] The inner part of the support block is provided with a through hole, the main adjusting pad is sleeved in the through hole at the tail end of the support block and abuts against the inner wall of the support block, and the top of the adjusting pad abuts against the tail part of the piston rod through a second limiting part;

[0017] The check ring seat is provided with a through hole and a mounting groove, the front end of the support block is inserted into the mounting groove, the through holes of the check ring seat and the support block are arranged on the same axis, and the piston rod is arranged in the through holes of the check ring seat and the support block.

[0018] Further, the contact area between the check ring seat close to the stop ring and the piston rod is provided with an anti-scratch lining, and the contact area between the support block and the piston rod is provided with an anti-scratch lining.

[0019] Further, the pressure absorbing spring is a disc spring, and the return spring and the give spring are compression springs.

[0020] Further, a limiting check ring is arranged around the outer periphery of the support seat, and the return spring abuts against the limiting check ring.

[0021] Further, the contact surface of the stop ring seat and the stop ring is formed by high-hardness material.

[0022] In a second aspect, the application further discloses a stop ring riveting device, which comprises a connecting rod, a riveting head and the stop ring riveting clamp disclosed in the first aspect, one end of the connecting rod is connected to a riveting machine, and the other end is fixedly connected with the riveting head through a fixing pin; wherein,

[0023] The riveting head comprises a fixed area and a stress area in a cylindrical structure, the size of the fixed area is smaller than that of the stress area, and the fixed area is inserted into the mounting groove of the connecting rod;

[0024] The stress area is provided with a guide surface, an avoiding hole and a pin hole, the guide surface and the avoiding hole are both profiled and polished structures, and the riveting head is matched with the piston rod in a small gap.

[0025] Further, the stop ring riveting device further comprises a blowing structure, and a blowing nozzle of the blowing structure is opposite to the stop ring.

[0026] The application achieves the following beneficial effects: the application discloses a stop ring riveting clamp and a riveting device, wherein the stop ring riveting clamp comprises a stop ring seat, a support block, a support seat and a main adjusting pad block, the support block is sleeved on the front end part of the stop ring seat and the tail end part of the support seat, and is limited and abuts against each other; one end of the support seat is sleeved on a limiting 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 limiting seat and the support seat; and the main adjusting pad block is arranged in the support block; a pressure absorbing spring is arranged on the bottom of the main adjusting pad block; the stop ring is arranged on the stop ring seat, the piston rod penetrates the stop ring and the stop ring seat, and is sleeved in the inner cavity of the support block and abuts against the main adjusting pad block. The riveting head is pressed down to the stop ring by a servo cylinder, the end surface of the stop ring is riveted by the end part of the riveting head, when the riveting head is pressed down, the piston rod and the stop ring conduct the pressure to the bottom, the stop ring seat conducts the pressure to the support block, the piston rod conducts the pressure to the main adjusting pad block in the inner cavity of the support block through the inner cavity of the stop ring seat and the support block, and the pressure is buffered by the pressure absorbing spring arranged below the main adjusting pad block, the pressure absorbing spring can compensate the position and pressure of the stop ring; at the same time, the stop ring seat, the support block and the support seat are sequentially pressed down and limited and buffered from outside; the stop ring riveting clamp is simultaneously buffered and pressed down from inside and outside, the relative position of the piston rod and the stop ring is more stable and cannot be changed in the vertical direction, and the riveting precision and quality of the product are guaranteed.

[0027] Therefore, when the position of the stop ring and the piston rod deviates, the deviation can be compensated and given room by the pressure absorbing spring through the stop ring riveting clamp, and the relative position of the piston rod and the stop ring is guaranteed.

[0028] Moreover, the secondary adjusting pad, the let go spring, the pull rod and the reset spring are arranged in the stop ring riveting clamp, the secondary adjusting pad is located in the supporting block, and the two ends of the main adjusting pad are respectively abutted against the two ends of the pressure absorbing spring, the pull rod is arranged in the supporting block and abutted against the supporting block in position, the let go spring is arranged on the outer periphery of the pull rod, and the reset spring is arranged between the supporting seat and the limiting seat. When the riveting head is pressed down, the piston rod and the stop ring conduct the pressure to the bottom, the main adjusting pad in the cavity of the supporting block, and the pressure absorbing spring arranged below the main adjusting pad is used for buffering, the position and the pressure absorption of the stop ring can be compensated by the pressure absorbing spring, the reset spring is compressed during the movement of the supporting seat, and the let go spring is also compressed during the movement of the secondary adjusting pad, so that the pressure absorption and the position adjustment are partially achieved, after the riveting is completed, the reset spring and the let go spring are unloaded and moved upward, so that the riveting head is used for riveting other piston rods and stop rings, and the working efficiency and the riveting precision are improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative labor.

[0031] Figure 1 is a perspective structural schematic view of a stop ring riveting clamp provided by the present application.

[0032] Figure 2 is a sectional structural schematic view of a stop ring riveting clamp provided by the present application.

[0033] Figure 3 is a partial sectional structural schematic view of a stop ring riveting clamp provided by the present application.

[0034] Figure 4 is a structural schematic view of a stop ring riveting device provided by the present application.

[0035] Figure 5 is a structural schematic view of a riveting head provided by the present application.

[0036] DRAWINGS

[0037] 1-connecting rod, 2-riveting head, 3-piston rod, 31-second limiting part, 4-blowing structure, 5-stop ring, 6-stop ring seat, 7-supporting block, 71-first limiting part, 8-supporting seat, 81-limiting stop ring, 9-main adjusting pad block, 10-return spring, 11-pressure absorbing spring, 12-secondary adjusting pad block, 13-pull rod, 14-giving spring, 15-limiting seat. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will make further detailed description to the utility model combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0039] In order to effectively illustrate the utility model examples, the following will make detailed description to the application examples with reference to the drawings.

[0040] Referring to Figure 1 and Figure 2 , combining the three-dimensional structure of the stop ring riveting clamp and the sectional structure of the stop ring riveting clamp.

[0041] As Figure 1 and Figure 2 described, the stop ring riveting clamp is used for riveting and clamping the piston rod 3 and the stop ring 5, comprising a stop ring seat 6, a supporting block 7, a supporting seat 8 and a main adjusting pad block 9, the stop ring seat 6, the supporting block 7 and the supporting seat 8 are respectively provided with through holes, the piston rod 3 is sleeved in the through holes of the stop ring seat 6 and the supporting block 7, at the same time, the front end of the supporting block 7 is sleeved in the stop ring seat 6, the tail end is sleeved in the supporting seat 8, and they are limited and abutted with each other.

[0042] Further, the supporting seat 8 is provided with a through hole along the axial direction, the outer wall of the supporting block 7 is provided with a first limiting part 71, and the part from the first limiting part 71 to the tail end is sleeved in the through hole and abuts with the inner wall of the supporting seat 8. The structure of the supporting block 7 and the position of the whole stop ring riveting clamp 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 stop ring seat 6, but also transmit the downward pressure to the supporting seat 8 below.

[0043] The top edge of the supporting seat 8 abuts with the first limiting part 71 of the outer wall of the supporting block 7, so that the supporting block 7 abuts and presses the supporting seat 8 when it is pressed under force. The supporting block 7 is provided with a through hole inside, the main adjusting pad block 9 is sleeved in the through hole at the tail end of the supporting block 7 and abuts with the inner wall of the supporting block 7, and the top of the main adjusting pad block 9 abuts with the tail of the piston rod 3 through the second limiting part 31; the stop ring seat 6 is provided with a through hole and a mounting groove inside, the front end of the supporting block 7 is inserted into the mounting groove, the through holes of the stop ring seat 6 and the supporting block 7 are provided with the same axis, and the piston rod 3 is arranged in the through holes of the stop ring seat 6 and the supporting block 7.

[0044] From the above description, the structure of the stop ring riveting clamp provided by the application is known, the limiting structure is arranged on the outer wall of the stop ring seat 6, the support block 7 and the support seat 8, when the riveting head 2 is pressed downward, the piston rod 3 and the stop ring 5 are pressed downward, the stop ring seat 6 is driven to press downward, the limiting part of the outer wall of the stop ring seat 6 abuts against the support block 7, the support block 7 is pressed downward, the first limiting part 71 of the support block 7 abuts against the support seat 8, the support seat 8 is pressed downward, and thus the pressure of the riveting head 2 is conducted downward.

[0045] Referring to Figure 3 Another cross-sectional structure schematic view of the stop ring riveting clamp provided by the application is shown, the bottom end of the support seat 8 is sleeved on the limiting seat 15, the outer periphery of the support seat 8 is sleeved with the reset spring 10, and the two ends of the reset spring 10 abut against the limiting seat 15 and the support seat 8 respectively.

[0046] The bottom end of the main adjustment pad 9 is provided with the pressure absorption spring 11, the stop ring 5 is arranged on the stop ring seat 6, the piston rod 3 penetrates through the stop ring 5 and the stop ring seat 6, 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 outer periphery of the piston rod 3. Therefore, the piston rod 3 can conduct the downward pressure to the main adjustment pad 9 in the inner cavity of the support block 7, the main adjustment pad 9 conducts the downward pressure to the pressure absorption spring 11, so that the pressure absorption spring 11 buffers the downward pressure.

[0047] The outer periphery of the support seat 8 is surrounded by a ring of limiting stop rings 81, the reset spring 10 abuts against the limiting stop rings 81, when the support seat 8 is subjected to the downward pressure, the pressure is conducted to the reset spring 10 through the limiting stop rings 81, at the same time, the reset spring 10 abuts against the limiting seat 15, so that the reset spring 10 is buffered between the limiting seat 15 and the limiting stop rings 81 of the support seat 8.

[0048] The stop ring riveting clamp further comprises a secondary adjustment pad 12, the secondary adjustment pad 12 is located in the support block 7 and is arranged at the bottom of the pressure absorption spring 11, abuts against the two ends of the pressure absorption spring 11 respectively with the main adjustment pad 9, and can further buffer the downward pressure after the pressure absorption spring 11 is buffered.

[0049] In the embodiments provided by the application, in addition to the limiting parts arranged on the outside of the stop ring seat 6, the support block 7 and the support seat 8, through holes are arranged in the inside of the stop ring seat 6, the support block 7 and the support seat 8, the piston rod 3 is sleeved in the stop ring seat 6 and the support block 7, the second limiting part 31 arranged on the piston rod 3 abuts against the main adjustment pad 9, so that when the piston rod 3 is pressed downward, the main adjustment pad 9 is pressed downward.

[0050] The pressure absorbing spring 11 is arranged between the main adjusting pad 9 and the secondary adjusting pad 12, and the reset spring 10 is arranged between the limiting seat 15 and the supporting seat 8, so that the downward pressure from the riveting head 2 is absorbed and compensated by the position and pressure of the stop ring 5 in the inner cavity and outer wall of the stop ring riveting clamp, and the position is limited and buffered. The pressure absorbing spring 11 can be a disc spring, which can effectively realize pressure compensation and prevent overpressure.

[0051] When the main adjusting pad 9 is pressed downward, the excess pressure absorbed by the pressure absorbing spring 11 is transmitted to the secondary adjusting pad 12. The bottom of the secondary adjusting pad 12 is provided with a pull rod 13, the pull rod 13 is located inside the supporting block 7 and abuts against the supporting block 7, the pull rod 13 is provided with a let-in spring 14 around the circumference, and the two ends of the pull rod 13 abut against the secondary adjusting pad and the let-in spring 14, respectively. The top of the pull rod 13 is provided with a limiting ring, one end of the let-in spring 14 abuts against the limiting ring, and the other end abuts against the limiting boss arranged inside the supporting block 7.

[0052] The arrangement of the pull rod 13 and the let-in spring 14 can further transmit the pressure that cannot be absorbed by the pressure absorbing spring 11 downward to the let-in spring 14, so that the downward pressure of the riveting head 2 is further buffered and absorbed. The reset spring 10 and the let-in spring 14 can be compression springs.

[0053] The contact area between the stop ring 5 and the piston rod 3 is provided with an anti-scratch lining, and the contact area between the supporting 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 of the stop ring 5 connected with the piston rod 3 from being scratched by the piston rod 3.

[0054] The contact surfaces of the stop ring 5 and the stop ring 5 are formed by high-hardness materials, which can further prevent the inner side of the mouth of the stop ring 5 from being scratched by the piston rod 3.

[0055] As can be seen from the above embodiment structure, the stop ring riveting clamp can be abutted against each other from top to bottom by the stop ring seat 6, the supporting block 7, the supporting seat 8 and the limiting seat 15, and the reset spring 10 is arranged between the supporting seat 8 and the limiting seat 15 to realize the buffering and absorption of the external pressure of the clamp. Meanwhile, the stop ring seat 6, the supporting block 7, the supporting seat 8 and the limiting seat 15 are arranged in the inner sleeve and abut against each other, the main adjusting pad 9 and the secondary adjusting pad 12 are arranged in the inner cavity of the supporting block 7, and the pressure absorbing spring 11 is arranged between the main adjusting pad 9 and the secondary adjusting pad 12 to realize the buffering and absorption of the downward pressure of the riveting head 2 in the inner part of the clamp, so as to ensure that the piston rod 3 and the stop ring 5 are more stable in the vertical direction, the riveting can be quickly realized, and the riveting precision and quality can be ensured.

[0056] The application also provides another stop ring riveting device, as shown in Figure 4 and Figure 5 as shown, Figure 4is a structural schematic view of a stop ring riveting device provided by the present application, Figure 5 is a structural schematic view of a riveting head provided by the present application.

[0057] As shown in Figure 4 and Figure 5 , the stop ring riveting device comprises a connecting rod 1, a riveting head 2 and the stop ring riveting clamp provided by the above embodiment, one end of the connecting rod 1 is connected to a riveting machine (specifically, a servo cylinder of the riveting machine), and the other end is fixedly connected with the riveting head 2 through a fixing pin; wherein,

[0058] The riveting head 2 comprises a fixed area and a stress area in a cylindrical structure, the size of the fixed area is smaller than that of the stress area, and the fixed area is inserted into the installation groove of the connecting rod 1; the stress area is provided with a guide surface, an avoiding hole and a pin hole, the guide surface and the avoiding hole are both in a profiled polishing structure, and the riveting head 2 is in a micro-gap cooperation with the piston rod 3.

[0059] In the specific implementation process, as shown in Figure 4 , the stop ring riveting device further comprises a blowing structure 4, a blowing nozzle of the blowing structure 4 is directly opposite to the stop ring 5, so that the dust generated in the process of the riveting machine driving the riveting head 2 to press down or the debris generated by the riveting is blown away through the blowing structure 4, so as to avoid the influence of the generated debris and dust on the quality of the formed stop ring. Of course, the specific structure of the blowing structure 4 is not described in detail here.

[0060] In addition, in the specific implementation process, the limiting seat 15 can be uniformly arranged on the rotating disc (not shown in the drawings), or a plurality of limiting seats 15 are arranged on the rotating disc, so that after the riveting action of the last piston rod 3 and the stop ring 5 is completed, the rotating disc is moved to the next station (i.e. the piston rod 3 and the stop ring 5 pre-installed in the limiting seat 15), and the riveting action is repeated, so as to cycle the processing.

[0061] The stop ring riveting device adopted by the present application is described from the arrangement, and the stop ring riveting device comprises a connecting rod 1, a riveting head 2 and a stop ring riveting clamp, the connecting rod 1 is connected with a riveting machine, the riveting head 2 is fixed with the connecting rod 1 through a fixing pin, the stop ring 5 is placed on a check ring seat 6, then in the process of pressing down the riveting head 2, the riveting head 2 is pressed down to the check ring seat 6 through a servo cylinder, the riveting head 2 is matched with the piston rod 3 through a micro-gap, and the guiding surface and the avoiding hole are shaped and polished, so that the end structure of the riveting head 2 rivets the end surface of the stop ring 5, if the position deviation of the check ring groove of the piston rod 3 is large, the pressure absorbing spring 11 will give way in a certain range, the relative position of the stop ring 5 and the piston rod 3 is ensured, and the piston rod 3 and the stop ring 5 will not change in the vertical direction after being stressed, so that the riveting quality of the product is ensured. The riveting mode greatly strengthens the pull-off force, which exceeds the pull-off force of welding, interference assembly and other fixing modes, the relative position of the piston rod 3 and the stop ring 5 is fixed due to the characteristics of the process, the piston rod 3 and the stop ring 5 will not have the risk of functional abnormality or loss due to shock absorber oil pollution, the assembly efficiency is high, and the stop ring riveting device is suitable for mass production.

[0062] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stop ring riveting clamp for riveting and clamping a piston rod (3) and a stop ring (5), characterized in that, It includes a retaining ring seat (6), a support block (7), a support seat (8) and a main adjusting pad (9). 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), and they limit and abut against each other. One end of the support base (8) is sleeved on the limiting seat (15), and a return spring (10) is sleeved on the outer periphery of the support base (8), with the two ends of the return spring (10) abutting against the limiting seat (15) and the support base (8) respectively. The main adjusting pad (9) is located inside the support block (7); a pressure absorbing spring (11) is provided at the bottom of the main adjusting pad (9). The stop ring (5) is disposed 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 adjusting pad (9).

2. The stop ring riveting fixture as described in claim 1, characterized in that, The stop ring riveting fixture also includes a secondary adjustment pad (12), which is located inside the support block (7) and abuts against both ends of the pressure absorption spring (11) along with the main adjustment pad (9).

3. The stop ring riveting fixture as described in claim 2, characterized in that, The bottom of the secondary adjustment pad (12) is provided with a pull rod (13). The pull rod (13) is located inside the support block (7) and is in contact with the support block (7). A relief spring (14) is provided on the outer periphery of the pull rod (13). The two ends of the pull rod (13) abut against the secondary adjustment pad (12) and the relief spring (14) respectively.

4. The stop ring riveting fixture as described in claim 3, characterized in that, The top of the pull rod (13) is provided with a limiting ring, one end of the relief spring (14) abuts against the limiting ring, and the other end abuts against the limiting boss provided inside the support block (7).

5. The stop ring riveting fixture as described in claim 1, characterized in that, The support base (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 part (71). The portion of the first limiting part (71) to the tail end is sleeved in the through hole and abuts against the inner wall of the support base (8). The top edge of the support base (8) abuts against the first limiting part (71), so that the support block (7) presses against the support base (8) when it is pressed down. The support block (7) has a through hole inside. The main adjusting pad (9) is fitted into the through hole at the tail end of the support block (7) and abuts against the inner wall of the support block (7). The top of the main adjusting pad (9) abuts against the tail of the piston rod (3) through the second limiting part (31). The retaining ring seat (6) is provided with a through hole and an installation groove. 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. The piston rod (3) is arranged in the through holes of the retaining ring seat (6) and the support block (7).

6. The stop ring riveting fixture as described in claim 5, characterized in that, The contact area between the retaining ring seat (6) near the stop ring (5) and the piston rod (3) is provided with a scratch-resistant liner, and the contact area between the support block (7) and the piston rod (3) is provided with a scratch-resistant liner.

7. The stop ring riveting fixture as described in claim 4, characterized in that, The pressure absorption spring (11) is a disc spring, and the reset spring (10) and the relief spring (14) are both compression springs.

8. The stop ring riveting fixture as described in claim 1, characterized in that, A limiting ring (81) is arranged around the outer periphery of the support base (8), and the reset spring (10) abuts against the limiting ring (81).

9. A stop ring riveting device, characterized in that, The assembly includes a connecting rod (1), a rivet head (2), and a stop ring riveting fixture as described in any one of claims 1-8. 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) by a fixing pin. The rivet joint (2) includes a fixed area and a force-bearing area in the form of a cylindrical structure. The size of the fixed area is smaller than that of the force-bearing area. The fixed area is inserted into the mounting groove of the connecting rod (1). The stress zone is provided with a guide surface, a clearance hole and a pin hole. The guide surface and the clearance hole are both contour polished structures, and the rivet joint (2) and the piston rod (3) are in micro-clear clearance fit.

10. The stop ring riveting device as described in claim 9, characterized in that, The stop ring riveting device also includes a cleaning structure (4), the nozzle of which faces the stop ring (5).

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