End connection structure of a shock absorber

Abstract

The utility model relates to the technical field of shock absorber end, and disclose a kind of end connection structure of shock absorber, including shock absorber piston rod, the bottom end of shock absorber piston rod is equipped with spring seat, the top end of shock absorber piston rod is equipped with connecting seat, the outside of shock absorber piston rod is equipped with shock absorber spring between spring seat and connecting seat, the bottom end of spring seat is equipped with limit insert sleeve, the limit insert sleeve is inserted with limit insert rod inside, the bottom end of limit insert rod is fixedly installed with lower end joint, the utility model is inserted with the cooperation of limit insert sleeve and limit insert rod, in combination with the fastening screw in counterbore and through-hole, form double positioning structure: the insertion relationship of limit insert sleeve and insert rod limits the radial displacement of connecting seat and lower end joint, fastening screw further locks axial position, effectively avoid the relative displacement problem that traditional single bolt connection is prone to.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber end technology, specifically to an end connection structure for a shock absorber. Background Technology

[0002] In the application of shock absorbers, whether in automobiles, construction machinery, or small transportation equipment, the end connection structure is the core link to ensure a stable connection between the shock absorber and the main body of the equipment (such as the body or frame) and to achieve the shock absorption function. As the requirements for shock absorption performance, reliability, and service life of equipment continue to increase, traditional shock absorber end connection structures have gradually revealed many technical defects, making it difficult to meet actual usage needs. Specific problems include: traditional shock absorber ends often use a single bolt connection or a simple insert structure. Under long-term exposure to high-frequency vibrations and impact loads (such as vehicles driving over bumpy roads or construction machinery operating on bumpy surfaces), the bolts are prone to loosening due to vibration, and insert structures may experience increased clearance. For example, in some passenger car shock absorbers, the connection between the upper connecting seat and the piston rod is only fixed by a single set of bolts. After long-term use, the bolt preload decreases, causing relative displacement between the connecting seat and the piston rod. This not only affects the shock absorption effect but may also generate abnormal noise and even pose safety hazards. Therefore, new technical solutions are needed to address these issues. Utility Model Content

[0003] The purpose of this invention is to provide an end connection structure for a shock absorber to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an end connection structure for a shock absorber, comprising a shock absorber piston rod, a spring seat mounted at the bottom end of the shock absorber piston rod, a connecting seat mounted at the top end of the shock absorber piston rod, and a shock absorber spring fitted between the spring seat and the connecting seat on the outside of the shock absorber piston rod; a limiting sleeve mounted at the bottom end of the spring seat, a limiting rod inserted inside the limiting sleeve, a lower end connector fixedly mounted at the bottom end of the limiting rod, a connecting sleeve mounted at the end of the lower end connector, a countersunk hole formed on the side wall of the limiting sleeve, and a through hole formed on the outer wall of the top end of the limiting rod, with fastening screws inserted into the countersunk hole and the through hole.

[0005] Preferably, the other side wall of the limiting sleeve is provided with a countersunk groove, and the end of the fastening screw extends into the countersunk groove and is screwed with a fastening nut.

[0006] Preferably, the bottom end of the bolt body is provided with a circular groove, the bottom end of the fastening screw is provided with an anti-loosening screw groove, an anti-loosening screw is screwed into the inside of the anti-loosening screw groove, and an anti-loosening sleeve is sleeved in the countersunk groove outside the anti-loosening screw.

[0007] Preferably, a fixing ring is installed on the upper outer end of the bolt rod, and three limiting posts are installed on the outer wall of the anti-detachment cylinder. The three limiting posts are distributed in a triangle, and the inner wall of each limiting post is provided with helical teeth that cooperate with the fastening bolt.

[0008] Preferably, the outer wall of the fastening nut is provided with a stepped annular groove, and the end of the limiting post is disposed in the stepped annular groove.

[0009] Preferably, a retaining ring is fixedly installed on the upper outer end of the fastening screw, and an annular pressure plate, a spring and an annular rubber sheet are fitted on the circumferential surface of the fastening screw. An extrusion block is fixedly installed at the lower edge of the annular pressure plate.

[0010] Preferably, the limiting post has a filling cavity inside, and an arched elastic element is installed inside the filling cavity.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This utility model forms a dual positioning structure by using the insertion and engagement of a limiting sleeve and a limiting rod, combined with the fastening screw in the countersunk hole and the through hole. The insertion relationship between the limiting sleeve and the rod restricts the radial displacement of the connecting seat and the lower end joint, while the fastening screw further locks the axial position, effectively avoiding the relative displacement problem that is prone to occur in traditional single bolt connections. Attached Figure Description

[0013] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 This is a top-view three-dimensional structural schematic diagram of the present invention;

[0015] Figure 3 A schematic diagram of the fastening screw provided by this utility model;

[0016] Figure 4 A schematic diagram of the limiting post provided by this utility model.

[0017] In the diagram: 1. Connecting seat; 2. Shock absorber piston rod; 3. Shock absorber spring; 4. Countersunk hole; 5. Limiting rod; 6. Lower end connector; 7. Connecting sleeve; 8. Limiting sleeve; 9. Spring seat; 10. Countersunk groove; 11. Fastening screw; 12. Helical tooth; 13. Fastening nut; 14. Anti-loosening groove; 15. Anti-loosening sleeve; 16. Anti-loosening screw; 17. Stepped annular groove; 18. Fixing ring; 19. Extrusion block; 20. Annular pressure plate; 21. Annular rubber sheet; 22. Spring; 23. Limiting post; 24. Filling cavity; 25. Arched elastic element. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-4 As shown, an end connection structure for a shock absorber includes a shock absorber piston rod 2. A spring seat 9 is fitted at the bottom end of the shock absorber piston rod 2, and a connecting seat 1 is fitted at the top end of the shock absorber piston rod 2. A shock absorber spring 3 is fitted between the spring seat 9 and the connecting seat 1 on the outside of the shock absorber piston rod 2. A limiting sleeve 8 is fitted at the bottom end of the spring seat 9, and a limiting rod 5 is inserted inside the limiting sleeve 8. A lower end connector 6 is fixedly installed at the bottom end of the limiting rod 5, and a connecting sleeve 7 is installed at the end of the lower end connector 6. A countersunk hole 4 is opened on the side wall of the limiting sleeve 8, and a through hole is opened on the outer wall of the top end of the limiting rod 5. A fastening screw 11 is inserted into the countersunk hole 4 and the through hole.

[0020] In practical implementation, the shock absorber piston rod 2 undertakes the main load transfer task and is the core component connecting the upper and lower parts, while also providing an installation reference for the shock absorber spring 3; the spring seat 9 provides lower-end support for the shock absorber spring 3, evenly transferring the spring force to the lower structure, while limiting the radial displacement of the spring; the connecting seat 1 is fixed to the top of the shock absorber piston rod 2, serving as both an upper-end limit for the shock absorber spring 3 and an interface for connection with the external structure; the shock absorber spring 3 is the main damping element, which, through its own elasticity... The deformation absorbs and buffers external vibration energy, reducing vibration transmission; the limiting sleeve 8 and the spring seat 9 provide insertion space for the limiting rod 5, realizing the connection transition between the spring seat 9 and the lower end connector 6; the lower end connector 6 serves as the lower connection point between the shock absorber and external equipment, and the connecting sleeve 7 is fitted onto the end of the lower end connector 6 to enhance the tightness of the connection between the lower end connector 6 and the external environment, while also playing a certain buffering and protective role; the fastening screw 11 passes through the countersunk hole 4 and the through hole to fix the limiting sleeve 8 and the limiting rod 5, thereby fixing them through the fastening screw 11.

[0021] The other side wall of the limiting sleeve 8 is provided with a countersunk groove 10, and the end of the fastening screw 11 extends into the countersunk groove 10 and is screwed with a fastening nut 13.

[0022] In the specific implementation process, the countersunk groove 10 provides installation space for the fastening nut 13, so that the nut is hidden inside the limiting sleeve 8, ensuring a flat appearance of the structure, and protecting the nut from external collision damage; after the fastening screw 11 is inserted into the countersunk hole 4 and the through hole, it is fixed by the fastening nut 13.

[0023] The bottom end of the fastening screw 11 is provided with an anti-loosening screw groove 14, and an anti-loosening screw 16 is screwed into the inside of the anti-loosening screw groove 14. An anti-loosening sleeve 15 is sleeved in the countersunk groove 10 on the outside of the anti-loosening screw 16.

[0024] In the specific implementation process, the anti-loosening groove 14 provides a threaded connection base for the anti-loosening screw 16, and the anti-loosening screw 16 can be screwed into the anti-loosening groove 14. At this time, the anti-loosening sleeve 15 is sleeved on the outside of the fastening screw 11.

[0025] The outer wall of the anti-detachment cylinder 15 is equipped with three limiting posts 23, which are arranged in a triangle. The inner wall of each limiting post 23 is provided with a spiral tooth 12 that cooperates with the fastening screw 11.

[0026] In the specific implementation process, the limiting post 23 is installed on the outer wall of the anti-detachment cylinder 15 and can be inserted into the stepped annular groove 17 of the fastening nut 13 to restrict the circumferential rotation of the fastening nut 13 and prevent it from loosening; the helical teeth 12 engage with the threads of the fastening screw 11 to enhance the tightness of the connection between the limiting post 23 and the fastening screw 11, further restricting the movement of the limiting post 23 and indirectly preventing the fastening nut 13 from loosening.

[0027] In some technical solutions, the outer wall of the fastening nut 13 is provided with a stepped annular groove 17, and the end of the limiting post 23 is set in the stepped annular groove 17.

[0028] In the specific implementation process, the stepped annular groove 17 provides installation space for the end of the limiting post 23. With the further cooperation between the limiting post 23 and the fastening screw 11, it can be inserted into the stepped annular groove 17 in a stepped manner.

[0029] A retaining ring 18 is fixedly installed on the upper outer end of the fastening screw 11. An annular pressure plate 20, a spring 22 and an annular rubber sheet 21 are fitted on the circumferential surface of the fastening screw 11. A compression block 19 is fixedly installed at the lower edge of the annular pressure plate 20.

[0030] In the specific implementation process, the sealing between the fastening screw 11 and the through hole can be improved by using the annular pressure plate 20, the spring and the annular rubber sheet 21.

[0031] The limiting post 23 has a filling cavity 24 inside, and an arched elastic element 25 is installed inside the filling cavity 24. The elasticity of the limiting post 23 can be improved by the arched elastic element 25. When the limiting post 23 is subjected to external force, the arched elastic element 25 undergoes elastic deformation and interacts with the inner wall of the filling cavity 24 to achieve force buffering and dispersion.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An end connection structure for a shock absorber, comprising a shock absorber piston rod (2), characterized in that, The bottom end of the shock absorber piston rod (2) is equipped with a spring seat (9), the top end of the shock absorber piston rod (2) is equipped with a connecting seat (1), and the outside of the shock absorber piston rod (2) is fitted with a shock absorber spring (3) between the spring seat (9) and the connecting seat (1). The bottom end of the spring seat (9) is fitted with a limiting sleeve (8), and a limiting rod (5) is inserted inside the limiting sleeve (8). A lower end connector (6) is fixedly installed at the bottom end of the limiting rod (5), and a connecting sleeve (7) is installed at the end of the lower end connector (6). A countersunk hole (4) is opened on the side wall of the limiting sleeve (8), and a through hole is opened on the top outer wall of the limiting rod (5). A fastening screw (11) is inserted into the countersunk hole (4) and the through hole.

2. The end connection structure of a shock absorber according to claim 1, characterized in that, The other side wall of the limiting sleeve (8) is provided with a countersunk groove (10), and the end of the fastening screw (11) extends into the countersunk groove (10) and is screwed with a fastening nut (13).

3. The end connection structure of a shock absorber according to claim 2, characterized in that, The bottom end of the fastening screw (11) is provided with an anti-loosening screw groove (14), and an anti-loosening screw (16) is screwed into the inside of the anti-loosening screw groove (14). An anti-loosening sleeve (15) is sleeved in the countersunk groove (10) on the outside of the anti-loosening screw (16).

4. The end connection structure of a shock absorber according to claim 3, characterized in that, The outer wall of the anti-detachment cylinder (15) is equipped with three limiting posts (23), which are arranged in a triangle. The inner wall of each limiting post (23) is provided with a spiral tooth (12) that cooperates with the fastening screw (11).

5. The end connection structure of a shock absorber according to claim 4, characterized in that, The outer wall of the fastening nut (13) is provided with a stepped annular groove (17), and the end of the limiting post (23) is located in the stepped annular groove (17).

6. The end connection structure of a shock absorber according to claim 1, characterized in that, A retaining ring (18) is fixedly installed on the upper outer end of the fastening screw (11). An annular pressure plate (20), a spring (22) and an annular rubber sheet (21) are fitted on the circumferential surface of the fastening screw (11). A compression block (19) is fixedly installed at the lower edge of the annular pressure plate (20).

7. The end connection structure of a shock absorber according to claim 4, characterized in that, The limiting post (23) has a filling cavity (24) inside, and an arched elastic element (25) is installed inside the filling cavity (24).

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