A press riveting device for preventing the shock absorber connecting rod nut from falling off

Abstract

The application relates to the technical field of damper installation, in particular to a press riveting device for preventing a damper connecting rod nut from falling off, which comprises a press riveting driving source, a press plate component for placing a working end, a supporting assembly for supporting a vehicle body end and a base for mounting the press plate component and the supporting assembly, the press plate component comprises an upper press cutter mechanism and a lower press cutter mechanism, the press riveting driving source drives the upper press cutter mechanism to ascend and descend to cooperate with the lower press cutter mechanism to press rivet the working end of the connecting rod, the upper press cutter mechanism comprises an upper press plate assembly and a lower press cutter assembly which are matched to press rivet the working end into a flat shape. The working end of the connecting rod is press riveted into a flat shape through cooperation of the upper press cutter assembly and the lower press cutter assembly, so that the locking nut is prevented from falling off from the connecting rod, the upper press cutter assembly is fixedly installed in the upper press plate assembly, the lower press cutter assembly is fixedly installed in the lower press plate assembly, and the press riveting process of the working end is more stable.

Description

Technical Field

[0001] This application relates to the technical field of shock absorber installation, and in particular to a press-fit device for preventing the shock absorber connecting rod nut from coming loose. Background Technology

[0002] Vibration dampers are one of the important components of automobiles. Their working principle is to use the internal friction between oil molecules to form damping force to reduce mechanical vibration and impact. A vibration damper includes a connecting rod, a piston, and a working cylinder. When the vibration damper is working, the connecting rod drives the piston to make reciprocating linear motion in the working cylinder.

[0003] like Figure 1 As shown, the connecting rod 1 includes a working end 2 connected to the piston and a body end 3 connected to the vehicle body. A piston valve assembly 4, which regulates the flow of oil and generates compressive damping force, is installed on the working end 2. The piston valve assembly 4 plays the role of regulating the flow of oil and generating damping force during the vibration reduction process. The piston valve assembly 4 includes a piston valve body 6 and a locking nut 5. The piston valve body 6 is locked and fixed to the working end 2 of the connecting rod 1 by the locking nut 5. During long-term operation, the shock absorber will be subjected to vibration and impact from the road surface. The locking nut 5 is prone to falling off, which will cause the shock absorber to make abnormal noise when the car is driving, thereby reducing the shock absorption effect and affecting the driving experience.

[0004] To prevent the locking nut from falling off, there are currently two ways to assemble the locking nut and the connecting rod. After the locking nut locks the piston valve onto the connecting rod, one method is to apply glue inside the locking nut to enhance its tightness. However, the locking nut can still fall off after the glue ages. The other method is to deform the locking nut by squeezing it to achieve the anti-loosening effect. However, squeezing and deforming the locking nut will damage its structure. During long-term use, it may further deform due to uneven stress or material fatigue, resulting in it falling off.

[0005] Therefore, a device is needed to prevent the connecting rod nut of the shock absorber from coming loose, in order to solve the problem that the locking nut of the piston valve on the working end of the connecting rod is prone to falling off. Summary of the Invention

[0006] In order to deform the working end of the connecting rod by pressing and riveting to prevent the locking nut from falling off, this application provides a pressing and riveting device for preventing the connecting rod nut of a shock absorber from falling off.

[0007] This application provides a riveting device for preventing the connecting rod nut of a shock absorber from coming loose, which adopts the following technical solution:

[0008] A riveting device for preventing the nut of a shock absorber connecting rod from coming loose, the riveting device includes a riveting drive source, a pressure plate component for placing the working end, a support assembly for supporting the vehicle body end, and a base for mounting the pressure plate component and the support assembly. The pressure plate component includes an upper pressure knife mechanism and a lower pressure knife mechanism. The riveting drive source drives the upper pressure knife mechanism to rise and fall to cooperate with the lower pressure knife mechanism in riveting the working end of the connecting rod. The upper pressure knife mechanism includes an upper pressure plate assembly and an upper pressure knife assembly that cooperates with the lower pressure knife mechanism to rivet the working end into a flat shape. The upper pressure knife assembly is fixedly installed inside the upper pressure plate assembly. The lower pressure knife mechanism includes a lower pressure plate assembly and a lower pressure knife assembly fixedly installed inside the lower pressure plate assembly.

[0009] By adopting the above technical solution, the riveting drive source is activated, which drives the upper pressure knife mechanism to rise and fall, thereby realizing the rise and fall of the upper pressure knife assembly. This allows the upper and lower pressure knife assemblies to work together to rivet the working end of the connecting rod into a flat shape, thus preventing the locking nut from falling off the connecting rod. The upper pressure knife assembly is fixedly installed in the upper pressure plate assembly, and the lower pressure knife assembly is fixedly installed in the lower pressure plate assembly, ensuring a more stable riveting process at the working end. The pressure plate component and the support assembly together stably support the connecting rod, preventing the connecting rod from shifting during the riveting process and ensuring that the riveting work is carried out smoothly and stably.

[0010] Optionally, both the upper pressure plate assembly and the lower pressure plate assembly include a middle pressure plate, a front pressure plate and a rear pressure plate fixed on both sides of the middle pressure plate, and the front pressure plate, the middle pressure plate and the rear pressure plate form a receiving cavity. The upper pressure knife assembly and the lower pressure knife assembly are respectively fixedly installed in the receiving cavities formed by the upper pressure plate assembly and the lower pressure plate assembly.

[0011] By adopting the above technical solution, the middle pressure plate, front pressure plate and rear pressure plate can be set so that the upper pressure knife assembly and the lower pressure knife assembly can be firmly fixed in the receiving cavity, ensuring that there will be no displacement or loosening during the riveting process, and ensuring the riveting effect at the working end.

[0012] Optionally, both the upper pressure knife assembly and the lower pressure knife assembly include a set of pressure knives. Each set of pressure knives has two knives and a first gap is left between the two pressure knives to allow the working end to generate radial deformation. The first gap is set along the height direction of the base.

[0013] By adopting the above technical solution, a first gap is left between a set of pressing knives along the height direction of the base, so that the working end of the connecting rod can generate radial deformation along the height direction of the base when subjected to riveting action, thereby making it easier to form a flat deformation of the working end, avoiding damage caused by excessive force during the riveting process of the working end, and ensuring the stability and reliability of the riveting process.

[0014] Optionally, the surface of the front pressure plate is recessed to form a relief groove to avoid axial deformation of the working end, the relief groove extending along the axial direction of the connecting rod and one end communicating with the first gap.

[0015] By adopting the above technical solution, the setting of the clearance groove avoids the front pressure plate from hindering the axial deformation of the working end during the riveting process, ensuring the smooth progress of the riveting process. The clearance groove is connected to the first gap, so that the working end can freely deform radially along the height direction of the base and axially along the axis of the connecting rod during riveting, thereby enabling the working end to be riveted smoothly to form a flat deformation, improving the quality and stability of riveting.

[0016] Optionally, the rear pressure plate has a recessed first placement groove for placing the piston valve assembly and a second placement groove for the working end to pass through. The first placement groove communicates with the second placement groove, and the side wall of the first placement groove abuts against the piston valve assembly.

[0017] By adopting the above technical solution, the setting of the second placement groove ensures that the working end of the connecting rod smoothly passes through the second placement groove and contacts the pressing knife. The side wall of the first placement groove abuts against the piston valve assembly, thereby achieving stable limiting of the piston valve assembly and preventing the piston valve assembly from being displaced and damaged by the pressing knife during the riveting process, thus achieving precise control of the riveting position of the working end.

[0018] Optionally, the middle pressure plate has a groove for the front pressure plate and the rear pressure plate to pass through, and the side wall of the groove protrudes to form an abutting step that abuts against the side of the pressure knife facing the rear pressure plate.

[0019] By adopting the above technical solution, the groove opened on the middle pressure plate can ensure that the front pressure plate and the rear pressure plate are accurately installed on the middle pressure plate. The overall structure of the middle pressure plate, the front pressure plate and the rear pressure plate is more stable. The contact step abuts against the side of the pressure knife facing the rear pressure plate, which further limits the position of the pressure knife and effectively prevents the pressure knife from shifting or deforming during use, thus ensuring the accuracy of the riveting process.

[0020] Optionally, the end of the pressure knife is folded to form an extension, which is fixedly installed between the front pressure plate and the middle pressure plate.

[0021] By adopting the above technical solution, the extension is fixedly installed between the front pressure plate and the middle pressure plate, so that one end of the extension abuts against the middle pressure plate, which increases the force-bearing area of ​​the pressure knife, enhances the overall strength and stability of the pressure knife, and reduces the risk of deformation of the pressure knife during the riveting process. The other end of the extension abuts against the top surface of the front pressure plate, which further limits the position of the pressure knife, thereby improving the riveting accuracy of the working end.

[0022] Optionally, a positioning rod is fixedly installed on the base, the intermediate pressure plate is sleeved on the positioning post, and an elastic element sleeved on the positioning rod is provided between the two intermediate pressure plates. The intermediate pressure plate located below the elastic element is fixed to the positioning rod, and the intermediate pressure plate located above the elastic element slides elastically along the axial direction of the positioning rod.

[0023] By adopting the above technical solution, the positioning rod guides the sliding of the upper intermediate pressure plate on the base, preventing the intermediate pressure plate from shifting during the sliding process and affecting the formation of the flat deformation of the working end. The design of the elastic element between the intermediate pressure plates allows the upper intermediate pressure plate to slide elastically along the axial direction of the positioning rod. During the riveting process, the elastic element acts as a buffer, and the pressure on the working end gradually increases, making the pressure transmission to the working end more stable, thereby protecting the working end. At the same time, the elastic element stores energy during the riveting process, and releases the energy after the riveting is completed. The upper intermediate pressure plate can return to its initial height under the action of the elastic element, preparing for the next step of the work.

[0024] Optionally, multiple stacked first gaskets are detachably connected to the two intermediate pressure plates, and the two ends of the elastic member respectively abut against the first gaskets.

[0025] By adopting the above technical solution, the elastic element abuts against the first gasket, so that when the elastic element recovers its deformation, the elastic force of the elastic element is evenly transmitted from the first gasket to the upper intermediate pressure plate. The first gasket can be detached between the two intermediate pressure plates, which makes it easy to flexibly adjust the number of the first gaskets according to the size of the flat deformation of the working end, thereby improving the applicability of the riveting device.

[0026] Optionally, the support assembly includes a support rod slidably mounted on a base along the axial direction of the connecting rod, and a V-shaped block fixedly mounted on the support rod, wherein a V-shaped groove for placing the vehicle body end is recessed on the V-shaped block.

[0027] By adopting the above technical solution, the support component can effectively support the body end of the connecting rod, ensuring the stability of the connecting rod position during the riveting process. The support rod and the base slide together, which can adapt to connecting rods of different lengths, thus improving the applicability of the riveting device. The V-groove can stably place the body end of the connecting rod, preventing displacement or shaking of the body end during the riveting process.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. The upper and lower pressure knife assemblies work together to press and rivet the working end of the connecting rod into a flat shape, thereby preventing the locking nut from falling off the connecting rod. The upper pressure knife assembly is fixedly installed in the upper pressure plate assembly, and the lower pressure knife assembly is fixedly installed in the lower pressure plate assembly, ensuring a more stable riveting process at the working end. The pressure plate component and the support assembly together stably support the connecting rod, preventing the connecting rod from shifting during the riveting process and ensuring that the riveting work is carried out smoothly and stably.

[0030] 2. A first gap is left between a set of pressure knives along the height direction of the base, so that the working end of the connecting rod can generate radial deformation along the height direction of the base when subjected to riveting action, thereby making it easier to form a flat deformation of the working end, avoiding damage due to excessive force during the riveting process, and ensuring the stability and reliability of the riveting process.

[0031] 3. The design of the elastic element between the intermediate pressure plates allows the upper intermediate pressure plate to slide elastically along the axial direction of the positioning rod. During the riveting process, the elastic element can play a buffering role, and the pressure on the working end gradually increases, making the pressure transmission to the working end more stable, thereby protecting the working end. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the piston valve assembly mounted on the connecting rod, used to show the state before the working end is riveted;

[0033] Figure 2 This is an exploded view of an embodiment of this application, used to illustrate the positional relationship between the upper pressing mechanism, the lower pressing mechanism, and the support components;

[0034] Figure 3 This is a partial exploded view of an embodiment of this application, used to illustrate the internal structure of the upper and lower pressing mechanisms;

[0035] Figure 4 This is a partial structural diagram of the connecting rod placed on the riveting device before riveting, used to show the positional relationship between the riveting tool and the working end;

[0036] Figure 5 This is a partial exploded view of an embodiment of this application, used to illustrate the positional relationship between the first placement slot and the second placement slot on the rear pressure plate;

[0037] Figure 6 This is a partial structural diagram of the connecting rod and the pressure knife, used to show the state after the working end is riveted;

[0038] Figure 7 This is a perspective view of the V-shaped block, used to show the positional relationship of the guide grooves on the V-shaped block;

[0039] Figure 8This is a perspective view of the central pressure plate, used to show the positional relationship of the opposing steps.

[0040] Reference numerals: 1. Connecting rod; 2. Working end; 3. Body end; 4. Piston valve assembly; 5. Locking nut; 6. Piston valve body; 7. Pressure plate assembly; 8. Support assembly; 9. Base; 10. Handle; 11. Upper pressure knife mechanism; 12. Lower pressure knife mechanism; 13. Upper pressure plate assembly; 14. Upper pressure knife assembly; 15. Lower pressure plate assembly; 16. Lower pressure knife assembly; 17. Flat deformation; 18. Front pressure plate; 19. Middle pressure plate; 20. Rear pressure plate; 21. First circular hole; 22. First threaded hole; 23. First bolt; 24. Receiving cavity; 25. Pressure knife; 26. First gap ; 27. Clearance groove; 28. Extension; 29. ​​Second threaded hole; 30. Second bolt; 31. Groove; 32. Abutting part; 33. Abutting step; 34. Limiting step; 35. First placement groove; 36. Second placement groove; 37. Positioning rod; 38. Third threaded hole; 39. Second round hole; 40. First washer; 41. Spring; 42. Second gap; 43. V-block; 44. Support rod; 45. Second washer; 46. V-groove; 47. Guide groove; 48. Annular step; 49. Slide groove; 50. Fourth round hole; 51. Third bolt; 52. Third round hole. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0042] Example:

[0043] A press-fit device for preventing the connecting rod nut of a shock absorber from coming loose, reference Figure 1 and Figure 2 The riveting device includes a riveting drive source, a pressure plate component 7, a support assembly 8, and a base 9. In this embodiment, the riveting drive source is a press with a pressure parameter of 100KN. The pressure plate component 7 includes an upper pressure knife mechanism 11 and a lower pressure knife mechanism 12. The upper pressure knife mechanism 11 includes an upper pressure plate assembly 13 and an upper pressure knife assembly 14, with the upper pressure knife assembly 14 fixedly installed inside the upper pressure plate assembly 13. The lower pressure knife mechanism 12 includes a lower pressure plate assembly 15 and a lower pressure knife assembly 16, with the lower pressure knife assembly 16 fixedly installed inside the lower pressure plate assembly 15. When the press is started, it drives the upper pressure knife assembly 14 to rise and fall. The upper pressure knife assembly 14, rising and falling together with the lower pressure knife assembly 16, rivets the working end 2 of the connecting rod 1. Figure 6 This causes the working end 2 to undergo a flattened deformation 17 during riveting. The pressure plate component 7 and the support component 8 are installed on the base 9. The pressure plate component 7 provides stable support for the working end 2 of the connecting rod 1, and the support component 8 provides stable support for the body end 3 of the connecting rod 1, so that the connecting rod 1 is stably placed on the riveting device, ensuring the smooth progress of the riveting process.

[0044] refer to Figure 2 and Figure 3 The upper pressure plate assembly 13 and the lower pressure plate assembly 15 each include a front pressure plate 18, a middle pressure plate 19, and a rear pressure plate 20 in sequence. The front pressure plate 18 and the rear pressure plate 20 are provided with a first locking hole, and the middle pressure plate 19 is provided with a second locking hole. A locking element is threaded into the first locking hole. The first locking hole is a first round hole 21, and the second locking hole is a first threaded hole 22. The locking element is a first bolt 23. The first bolt 23 passes through the first round hole 21 and is threadedly connected to the first threaded hole 22, thereby fixing the front pressure plate 18 and the rear pressure plate 20 on opposite sides of the middle pressure plate 19. The front pressure plate 18, the rear pressure plate 20 and the middle pressure plate 19 are threadedly connected, which facilitates the replacement of the upper pressure knife assembly 14 and the lower pressure knife assembly 16 as needed.

[0045] refer to Figure 2 and Figure 3 An accommodating cavity 24 is formed between the front pressure plate 18, the middle pressure plate 19, and the rear pressure plate 20 in the upper pressure plate assembly 13. The upper pressure knife assembly 14 is fixedly installed in the upper accommodating cavity 24. Another accommodating cavity 24 is formed between the front pressure plate 18, the middle pressure plate 19, and the rear pressure plate 20 in the lower pressure plate assembly 15. The lower pressure knife assembly 16 is fixedly installed in the lower accommodating cavity 24, ensuring that the upper pressure knife assembly 14 and the lower pressure knife assembly 16 can be stably fixed, thereby ensuring the stability of the riveting process.

[0046] refer to Figure 2 and Figure 3 Both the upper pressure knife assembly 14 and the lower pressure knife assembly 16 include a set of pressure knives 25, with two pressure knives 25 in each set. The pressure knives 25 are made of hard alloy, ensuring good hardness and thus ensuring a smooth riveting process. A first gap 26 is left between each set of pressure knives 25, which is set along the height direction of the base 9. As the pressure knives 25 rivet, the working end 2 undergoes radial deformation along the height direction of the base 9 at the first gap 26. A relief groove 27 is formed by a recess on the surface of the front pressure plate 18, which is set along the axial direction of the connecting rod 1. The working end 2 undergoes axial deformation along the axial direction of the connecting rod 1 along the relief groove 27. The relief groove 27 communicates with the first gap 26, and then combined with... Figure 6 The axial deformation is the same as the radial deformation along the axis of the connecting rod 1. The working end 2 at the first gap 26 does not contact the blade of the pressure knife 25. The working end 2 in this area can deform freely, making it easier for the working end 2 in contact with the blade of the pressure knife 25 to produce a flat deformation 17 along the short side of the base 9.

[0047] refer to Figure 2 and Figure 5One end of the pressure knife 25 is folded towards the front pressure plate 18 to form an extension 28. One end of the extension 28 is in contact with the inner top surface of the middle pressure plate 19, and the other end is in contact with the end of the front pressure plate 18 facing the middle pressure plate 19. This further limits the position of the pressure knife 25, increases the contact area between the pressure knife 25 and the middle pressure plate 19, and makes the pressure knife 25 more evenly stressed. Two second threaded holes 29 are opened through the upper and lower front pressure plates 18. Each second threaded hole 29 is internally threaded with a second bolt 30 that abuts against the pressure knife 25.

[0048] refer to Figure 5 and Figure 8 The middle pressure plate 19 is provided with grooves 31, which penetrate through the opposite sides of the middle pressure plate 19. The front pressure plate 18 and the rear pressure plate 20 are both provided with abutting parts 32. The abutting parts 32 on the front pressure plate 18 and the rear pressure plate 20 are inserted into the grooves 31 and a set of pressing knives 25 are stably pressed against the receiving cavity 24. The front pressure plate 18 and the rear pressure plate 20 are provided with limiting steps 34 that abut against the middle pressure plate 19. The side wall of the groove 31 is provided with abutting steps 33. The side of the pressing knives 25 facing the rear pressure plate 20 abuts against the abutting steps 33. The area between the upper and lower abutting steps 33 of the pressing knives 25 abuts against the rear pressure plate 20, making the position of the pressing knives 25 in the receiving cavity 24 more stable.

[0049] refer to Figure 5 and Figure 6 The rear pressure plate 20 has a recessed abutting part 32 with a first placement groove 35 and a second placement groove 36. The size and shape of the first placement groove 35 are adapted to the size and shape of the piston valve assembly 4. The piston valve assembly 4 abuts against the side walls of the first placement groove 35 on the upper and lower rear pressure plates 20. The second placement groove 36 facilitates the riveting work of the working end 2.

[0050] refer to Figure 2 and Figure 6A positioning rod 37 is threaded onto the base 9, and a third threaded hole 38 is provided on the base 9 for threaded connection with the positioning rod 37. Two intermediate pressure plates 19 each have a second round hole 39 of matching size, shape, and corresponding position. A first washer 40 and an elastic element are provided between the two intermediate pressure plates 19. The first washer 40 is installed on the upper and lower intermediate pressure plates 19, and the first washer 40 abuts against both ends of the elastic element. In this embodiment, the elastic element is a spring 41, and two springs 41 are provided symmetrically. The first washer 40 is 2mm thick and made of hard alloy. Multiple first washer 40s are sequentially placed on the positioning post, and the number of first washer 40s can be flexibly adjusted according to the flat deformation 17. The first pad 40 has a third circular hole 52 that is opposite to the second circular hole 39. The positioning rod 37 passes through the upper intermediate pressure plate 19, the first pad 40 above the pressure knife 25, the spring 41, the first pad 40, and the intermediate pressure plate 19 below the pressure knife 25. The intermediate pressure plate 19 below the spring 41 is press-fitted with the positioning rod 37 through the second circular hole 39. The positioning rod 37 above the spring 41 slides along the height direction of the base 9 through the second circular hole 39 and the spring 41. During the riveting process of the working end 2, the first pad 40 makes a second gap 42 between the two intermediate pressure plates 19 to ensure that the working end 2 can stably produce a flat deformation 17 towards the short side of the base 9.

[0051] refer to Figure 2 and Figure 6 The support assembly 8 includes a V-shaped block 43, a support rod 44, and a second gasket 45. The V-shaped block 43 has a recessed V-shaped groove 46 that abuts against the vehicle body end 3. The opening of the V-shaped groove 46 is larger than the outer diameter of the vehicle body end 3 to accommodate working ends 2 with different outer diameters. Figure 7 The bottom surface of the V-shaped block 43 is recessed to form a guide groove 47 that fits onto the support rod 44. The periphery of the support rod 44 protrudes to form an annular step 48, which abuts against the bottom surface of the V-shaped block 43. A sliding groove 49 is provided on the base 9 along the long side of the base 9. The bottom end of the support rod 44 passes into the sliding groove 49 and slides in cooperation with the sliding groove 49. The distance between the support assembly 8 and the pressure plate component 7 is adjusted according to the length of the connecting rod 1. A second washer 45 is fitted onto one end of the support rod 44 that passes into the sliding groove 49, and one end of the second washer 45 abuts against the base 9. One end contacts the other end, which abuts against the annular step 48. The second gasket 45 is a rubber gasket that acts as a buffer for the support rod 44. The base 9 has a fourth circular hole 50. Two symmetrically arranged handles 10 are threadedly connected to the base 9. The handles 10 have a fourth threaded hole (not shown in the figure). The third bolt 51 is threadedly connected to the fourth threaded hole. After the third bolt 51 passes through the fourth circular hole 50, it engages with the fourth threaded hole, thereby locking the handle 10 to the base 9. The handles 10 facilitate the transport of the riveting device and the connecting rod 1 into the press.

[0052] The implementation principle of this application embodiment is as follows: the intermediate pressure plate 19 located above the spring 41 is moved upward, and then the connecting rod 1 with the piston valve assembly 4 is placed on the riveting device. The piston valve assembly 4 is located in the second placement groove 36. The intermediate pressure plate 19 is lowered so that the upper and lower sets of pressure knives 25 abut against the periphery of the working end 2. The distance between the support assembly 8 and the pressure plate component 7 is adjusted so that the body end 3 of the connecting rod 1 is placed in the V-groove 46 of the V-block 43. The number of the first shims 40 is adjusted according to the required flat deformation 17. The riveting is performed by using the handle 10. The device, along with the connecting rod 1, is placed inside the press. The press is started, and the upper and lower sets of pressing knives 25 press the working end 2. During the pressing process, the spring 41 is compressed and stores energy. The working end 2 undergoes a flat deformation 17 along the short side of the base 9. The length of the flat deformation 17 is greater than the outer diameter of the locking nut 5, preventing the locking nut 5 from falling off the connecting rod 1. After the pressing is completed, the spring 41 returns to its original deformation and drives the upper middle pressure plate 19 to move upward along the positioning rod 37. The middle pressure plate 19 returns to its initial height. The connecting rod 1 is removed after the pressing is completed, and the pressing of the working end 2 is finished.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A press-fitting device for preventing the nut of a shock absorber connecting rod from coming loose, characterized in that: The riveting device includes a riveting drive source, a pressure plate component (7) for placing the working end (2), a support component (8) for supporting the body end (3), and a base (9) for mounting the pressure plate component (7) and the support component (8). The pressure plate component (7) includes an upper pressure knife mechanism (11) and a lower pressure knife mechanism (12). The riveting drive source drives the upper pressure knife mechanism (11) to rise and fall to cooperate with the lower pressure knife mechanism (12) to rivet the working end (2) of the connecting rod (1). The upper pressure knife mechanism (11) includes an upper pressure plate assembly (13) and an upper pressure knife assembly (14) that cooperates with the lower pressure knife mechanism (12) to rivet the working end (2) into a flat shape. The upper pressure knife assembly (14) is fixedly installed in the upper pressure plate assembly (13). The lower pressure knife mechanism (12) includes a lower pressure plate assembly (15) and a lower pressure knife assembly (16) fixedly installed in the lower pressure plate assembly (15).

2. The riveting device for preventing the nut of a shock absorber connecting rod from coming off according to claim 1, characterized in that: The upper pressure plate assembly (13) and the lower pressure plate assembly (15) each include a middle pressure plate (19), a front pressure plate (18) and a rear pressure plate (20) fixed on both sides of the middle pressure plate (19). The front pressure plate (18), the middle pressure plate (19) and the rear pressure plate (20) form a receiving cavity (24). The upper pressure knife assembly (14) and the lower pressure knife assembly (16) are respectively fixedly installed in the receiving cavity (24) formed by the upper pressure plate assembly (13) and the lower pressure plate assembly (15).

3. A riveting device for preventing the nut of a shock absorber connecting rod from coming loose, as described in claim 2, characterized in that: Both the upper pressure knife assembly (14) and the lower pressure knife assembly (16) include a set of pressure knives (25). Each set of pressure knives (25) has two knives and a first gap (26) is left between the two pressure knives (25) to allow the working end (2) to generate radial deformation. The first gap (26) is set along the height direction of the base (9).

4. A riveting device for preventing the nut of a shock absorber connecting rod from coming loose, as described in claim 3, characterized in that: The surface of the front pressure plate (18) is recessed to form a relief groove (27) to avoid axial deformation of the working end (2). The relief groove (27) extends along the axial direction of the connecting rod (1) and one end is connected to the first gap (26).

5. A riveting device for preventing the nut of a shock absorber connecting rod from coming loose, as described in claim 2, characterized in that: The rear pressure plate (20) has a recessed first placement groove (35) for placing the piston valve assembly (4) and a second placement groove (36) for the working end (2) to pass through. The first placement groove (35) and the second placement groove (36) are connected. The side wall of the first placement groove (35) abuts against the piston valve assembly (4).

6. A riveting device for preventing the nut of a shock absorber connecting rod from coming loose, as described in claim 3, characterized in that: The middle pressure plate (19) has a groove (31) for the front pressure plate (18) and the rear pressure plate (20) to pass through. The side wall of the groove (31) protrudes to form an abutting step (33) that abuts against the side of the pressure knife (25) facing the rear pressure plate (20).

7. A riveting device for preventing the nut of a shock absorber connecting rod from coming loose, as described in claim 3, characterized in that: The end of the pressure knife (25) is folded to form an extension (28), which is fixedly installed between the front pressure plate (18) and the middle pressure plate (19).

8. A riveting device for preventing the nut of a shock absorber connecting rod from coming loose, as described in claim 2, characterized in that: A positioning rod (37) is fixedly installed on the base (9). The intermediate pressure plate (19) is sleeved on the positioning post. An elastic element is provided between the two intermediate pressure plates (19) and sleeved on the positioning rod (37). The intermediate pressure plate (19) located below the elastic element is fixed to the positioning rod (37), and the intermediate pressure plate (19) located above the elastic element slides elastically along the axial direction of the positioning rod (37).

9. A riveting device for preventing the nut of a shock absorber connecting rod from coming off, as described in claim 8, characterized in that: Multiple stacked first gaskets (40) are detachably connected to the two intermediate pressure plates (19), and the two ends of the elastic member respectively abut against the first gaskets (40).

10. A riveting device for preventing the nut of a shock absorber connecting rod from coming off, as described in claim 1, characterized in that: The support assembly (8) includes a support rod (44) slidably mounted on a base (9) along the axial direction of the connecting rod (1) and a V-shaped block (43) fixedly mounted on the support rod (44), wherein a V-shaped groove (46) for placing the vehicle body end (3) is recessed on the V-shaped block (43).

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