Spring damper

Abstract

The utility model discloses a spring shock absorber, including cylinder and sealing head, there is the piston rod in the sealing head and passes, and the one end of piston rod insertion cylinder is provided with the piston, and the middle part fixed of cylinder has the first installation disc, and the one end fixed of piston rod and gone out cylinder has the second installation disc, and the abutment of spring has between the first installation disc and the second installation disc, and the inside filling of cylinder has hydraulic oil, and the damping hole is seted up on the piston, the one end connected of piston rod and gone out cylinder has the ball head structure, the ball head structure cooperation has the connecting seat, the inside middle section of cylinder is provided with the stop structure, and the stop structure can stop the piston and continue to move to the sealing head, in the utility model, through the ball head structure, can make integral in certain range or angle deflection, can absorb the shearing impact from the horizontal plane direction to cylinder or piston rod, when spring compression rebound, the stop structure prevents the piston on piston rod and drives the piston to hit the sealing head when rebounding, improves the service life of integral.

Description

Technical Field

[0001] This utility model belongs to the field of shock absorber technology and relates to a spring shock absorber. Background Technology

[0002] Shock absorbers are used to suppress the oscillations caused by the rebound of springs after absorbing shocks, as well as impacts from the road surface. Widely used in vehicles, they attenuate vibrations of the chassis and body, improving ride comfort. When a vehicle travels over uneven roads, while existing shock absorbers can absorb impacts perpendicular to the road surface, some impacts in the horizontal plane remain unabsorbed. These horizontal impacts directly affect the radial direction of the shock absorber, subjecting the piston rod or cylinder to shear impacts, which can affect its service life over time. Furthermore, for heavier or heavily loaded vehicles, thicker springs are often used, causing significant impacts on the cylinder end structure when the piston rod rebounds. To address these technical problems, a spring shock absorber capable of absorbing shear impacts and reducing rebound impacts is urgently needed. Utility Model Content

[0003] This invention proposes a spring shock absorber, which effectively solves the problems in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A spring shock absorber includes a cylinder and a sealing head connected to the port of the cylinder. A piston rod with a sealing fit passes through the sealing head. A piston is provided at one end of the piston rod inserted into the cylinder. A first mounting plate is fixed in the middle of the cylinder. A second mounting plate is fixed at one end of the piston rod extending out of the cylinder. A spring abuts between the first and second mounting plates. The cylinder is filled with hydraulic oil. A damping hole is provided on the piston. The end of the piston rod extending out of the cylinder passes through the second mounting plate and is connected to a ball joint structure. The ball joint structure is fitted with a connecting seat. A stop structure is provided in the middle section of the cylinder body. The stop structure can prevent the piston from continuing to move towards the sealing head, and the piston rod can pass through the stop structure.

[0005] Furthermore, the stop structure includes a stop ring, and a rubber ring gasket is provided at the end of the stop ring facing the piston.

[0006] Furthermore, a metal ring gasket is provided at the end of the rubber ring gasket facing the piston.

[0007] Furthermore, the ball head structure includes a ball connected to the piston rod, a base, and a cover plate. The connecting seat has an installation groove, and the base and cover plate can hold the ball together and place it in the installation groove, allowing the ball to rotate. The opening of the installation groove is provided with a fixing plate fixed to the connecting seat.

[0008] Furthermore, the bottom of the mounting groove is provided with a threaded through hole, and a screw plug is connected to the threaded through hole. The base is provided with a through hole communicating with the threaded through hole. Lubricating grease is filled between the base and the ball head.

[0009] Furthermore, a cylinder liner is connected to the second mounting plate, and the cylinder liner is fitted onto the cylinder block.

[0010] Furthermore, a first ring body is fixed to one end of the cylinder liner away from the second mounting plate, the first ring body is connected to a second ring body that slides along the surface of the cylinder body, and a scraper sleeve that slides along the cylinder body is provided on the second ring body.

[0011] Furthermore, a shaft seal and a wear-resistant sleeve fitted onto the piston rod are installed inside the sealing head.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the ball head structure allows the entire assembly to deflect within a certain range or angle, absorbing shear impacts from the horizontal plane onto the cylinder or piston rod, thereby extending the overall service life. Furthermore, when the spring rebounds after compression, the stop structure prevents the piston from continuing to move towards the sealing head, preventing the piston on the piston rod from impacting the sealing head and further improving the overall service life. Attached Figure Description

[0013] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a schematic diagram of the spherical structure in this utility model; Figure 3 for Figure 1 Enlarged view of part A in the image; Figure 4 for Figure 1 Enlarged view of part B in the image; Figure 5 for Figure 1 Enlarged view of section C in the image.

[0014] In the diagram: 1. Cylinder block; 2. Sealing head; 3. Piston rod; 4. Piston; 5. First mounting plate; 6. Second mounting plate; 7. Spring; 9. Damping hole; 10. Connecting seat; 11. Stop ring; 12. Rubber ring gasket; 13. Metal ring gasket; 14. Ball; 15. Base; 16. Cover plate; 17. Fixing plate; 18. Plug; 19. Cylinder liner; 20. First ring body; 21. Second ring body; 22. Scraper sleeve; 23. Shaft seal; 24. Wear-resistant sleeve. Detailed Implementation

[0015] 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.

[0016] like Figures 1 to 5 As shown, this utility model proposes a spring shock absorber, including a cylinder body 1 and a sealing head 2. The cylinder body 1 is cylindrical, with an end cap fully welded to the other end for sealing. The sealing head 2 is connected to the port of the other end of the cylinder body 1 via a threaded pair. An O-ring is provided on the outer edge of the sealing head 2 to seal against the inner wall of the cylinder body 1. The sealing head 2 is collar-shaped, and a piston rod 3 passes through it. A shaft seal 23 is installed inside the sealing head 2. The shaft seal 23 is a sliding oil seal, which maintains a sealing state with the sealing head 2 when the piston rod 3 slides. To prevent the sealing head 2 from coming off the cylinder body after the threaded pair between the sealing head 2 and the cylinder body 1 loosens, a pin is provided between the sealing head 2 and the cylinder body 1.

[0017] A piston 4 is provided at one end of the piston rod 3 inserted into the cylinder body 1. The piston 4 has a damping hole 9. The piston 4 includes a first sleeve, a piston sleeve, and a retaining ring. The inside of the first sleeve is a flared mouth, and a conical surface is provided at the end of the piston rod 3. The flared mouth inside the first sleeve is fitted onto the conical surface. The retaining ring is fitted onto the end face of the first sleeve and hugs the piston sleeve to the first sleeve. A threaded post is integrally connected to the end face of the piston rod 3, and a fastening nut is fitted on the threaded post to tighten the first sleeve. The damping hole 9 passes through the first sleeve and the retaining ring and connects the spaces on both sides of the piston 4. A first mounting plate 5 is fixed in the middle of the cylinder body 1; specifically, an annular protrusion is integrally formed in the middle of the cylinder body 1, the first mounting plate 5 has a hole in the middle and is sleeved on the outside of the cylinder body 1 through the hole, and is fixed to the annular protrusion by welding; a second mounting plate 6 is fixed at one end of the piston rod 3 that protrudes from the cylinder body 1; a spring 7 abuts between the first mounting plate 5 and the second mounting plate 6. The cylinder 1 is filled with hydraulic oil. When the spring 7 rebounds, the piston 4 has a damping hole 9, which slows down the rebound rate of the spring 7, reduces impact, and makes the vehicle more stable. The piston rod 3 extends out of the cylinder 1, passes through the second mounting plate 6, and is connected to a ball joint structure. The ball joint structure is fitted with a connecting seat 10, which has a mounting hole and can be connected to the vehicle by high-strength bolts. Furthermore, a stop structure is provided in the middle section of the cylinder 1. The stop mechanism can prevent the piston 4 from continuing to move towards the sealing head 2. The piston rod 3 passes through the stop structure. Therefore, when the spring 7 rebounds, the piston 4 will abut against the stop structure and will not directly impact the sealing head 2, thus improving the service life of the sealing head 2 and the whole system.

[0018] In this embodiment, the stopping structure includes a stop ring 11. A rubber ring pad 12 is provided at the end of the stop ring 11 facing the piston 4. The rubber ring pad 12 has a buffering effect. When the spring 7 rebounds, the rubber ring pad 12 first receives the impact of the piston 4, reducing the impact of the piston 4 and improving the service life of the stop ring 11. Furthermore, a metal ring pad 13 is provided at the end of the rubber ring pad 12 facing the piston 4. Therefore, with the protection of the metal ring pad 13, the rubber ring pad 12 will not be subjected to the shear force when impacted by the piston 4, thus improving the service life of the rubber ring pad 12. Specifically, a stepped hole is opened in the middle of the cylinder body 1. The port of the stepped hole has an internal thread. The outer edge of the stop ring 11 has an external thread. The stop ring 11 is connected to the inside of the cylinder body 1 through the threaded pair. The metal ring pad 13 is provided at the bottom of the stepped hole, and the rubber ring pad 12 is provided between the metal ring pad 13 and the stop ring 11. To prevent the threaded pair from loosening, a punching process is performed at the port of the stepped hole.

[0019] In this embodiment, the ball head structure includes a ball 14 connected to the piston rod 3, a base 15, and a cover plate 16. During installation, a threaded post is integrally connected to one end of the piston rod 3 that passes through the second mounting plate 6. A threaded hole is provided on the ball 14 to mate with the threaded post. An installation groove is provided on the side of the connecting seat 10 facing the piston rod 3. The base 15 and the cover plate 16 are both placed in the installation groove. A through hole is provided on the cover plate 16. The inner annular surface of the through hole is a spherical surface that fits the outer surface of the ball 14. A hemispherical groove is provided on the base 15. The ball 14 is held together by the groove on the base 15 and the through hole on the cover plate 16. The ball 14 can rotate in the space formed by the holding of the base 15 and the cover plate 16. A fixing plate 17 is provided at the opening of the installation groove and is fixed to the connecting seat 10 by bolts. The fixing plate 17 can prevent the cover plate 16 and the base 15 from coming out of the installation groove. When the vehicle traverses uneven terrain, the ball joint structure allows the piston rod 3 and cylinder 1 to deflect within a certain range or angle, absorbing shear impacts from the horizontal surface and extending their overall service life. Furthermore, a washer ring fitted onto the threaded post is provided between the ball 14 and the second mounting plate 6, increasing the distance between the connecting seat 10 and the second mounting plate 6, providing the second mounting plate 6 with adequate room for movement.

[0020] Preferably, the bottom of the mounting groove has a threaded through hole, and a screw plug 18 is connected to the threaded through hole. The base 15 has a through hole communicating with the threaded through hole. Through the threaded through hole and the through hole, grease can be injected into the space formed by the base 15 and the cover plate 16, ensuring smooth rotation of the ball head within the space, reducing wear on the ball head, and improving its service life. Furthermore, during routine disassembly and maintenance, the screw plug 18 can be unscrewed, and grease can be directly injected.

[0021] In this embodiment, a cylinder liner 19 is connected to the second mounting plate 6. The cylinder liner 19 is fitted onto the cylinder body 1. The cylinder liner 19 can protect the piston rod 3 from impacts by external hard objects. Specifically, a flange is welded to one end of the cylinder liner 19 facing the second mounting plate 6. Threaded holes are opened on the second mounting plate 6, and the flange is connected to the second mounting plate 6 by bolts and threaded holes.

[0022] In this embodiment, a first ring 20 is welded and fixed to one end of the cylinder liner 19 away from the second mounting plate 6. The first ring 20 is connected to a second ring 21 that slides along the surface of the cylinder body 1. A scraper sleeve 22 that slides along the cylinder body 1 is provided on the second ring 21. The scraper sleeve is made of rubber material and can scrape off debris on the outer surface of the cylinder body 1, preventing it from entering the gap between the cylinder liner 19 and the cylinder body 1 and causing jamming. It also prevents external hard objects from entering the cylinder liner 19 and damaging the piston rod 3. To ensure a firm connection between the first ring 20 and the second ring 21, a pin is provided between the first ring 20 and the second ring 21.

[0023] In this embodiment, a wear-resistant sleeve 24 is installed inside the sealing head 2 and fitted onto the piston rod 3. The wear-resistant sleeve 24 is made of a high-strength non-metallic material, such as modified engineering plastic. It provides guidance and support for the piston rod 3, while reducing wear on the piston rod 3 and improving its service life. Furthermore, an oil storage ring groove is formed on the inner ring surface of the sealing head 2, and a hole is formed on the wear-resistant sleeve 24. A certain amount of oil can be stored in the oil storage ring groove, and the oil can enter the gap between the piston rod 3 and the wear-resistant sleeve 24 through the hole to provide lubrication, further reducing wear on the piston rod 3.

[0024] When using the above technical solution: a mounting base is provided at the end of the cylinder body 1 away from the ball head structure. The mounting base is connected to the cylinder body 1 by a threaded structure. The specific structure of the mounting base has been disclosed in the prior art. For details, please refer to the mounting base structure in the shock absorber with flexible mounting joint in the authorization announcement number CN207345791U. It will not be described again here. The present invention is installed on a vehicle as a whole via the connecting seat 10 and the mounting base. When the vehicle travels over uneven ground, the ball joint structure allows the piston rod 3 and cylinder 1 to deflect within a certain range or angle, absorbing the shearing impact from the horizontal surface on the cylinder 1 or piston rod 3, thereby extending the overall service life. Furthermore, when the spring 7 rebounds after compression, the stop structure prevents the piston 4 from continuing to move towards the sealing head 2, preventing the spring 7 from causing the piston 4 on the piston rod 3 to collide with the sealing head 2 during rebound, thus avoiding premature failure at the connection between the sealing head 2 and the cylinder 1 and improving the overall service life.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spring shock absorber, comprising a cylinder (1) and a sealing head (2) connected to the port of the cylinder (1), wherein a piston rod (3) with a sealing fit passes through the sealing head (2), a piston (4) is provided at one end of the piston rod (3) inserted into the cylinder (1), a first mounting plate (5) is fixed in the middle of the cylinder (1), a second mounting plate (6) is fixed at one end of the piston rod (3) extending out of the cylinder (1), and a spring (7) abuts between the first mounting plate (5) and the second mounting plate (6), characterized in that: The cylinder (1) is filled with hydraulic oil, and the piston (4) has a damping hole (9); one end of the piston rod (3) that passes through the cylinder (1) passes through the second mounting plate (6) and is connected to a ball head structure; the ball head structure is fitted with a connecting seat (10). The cylinder (1) has a stop structure in the middle section. The stop structure can stop the piston (4) from continuing to move toward the sealing head (2). The piston rod (3) can pass through the stop structure.

2. The spring shock absorber according to claim 1, characterized in that: The stop structure includes a stop ring (11), and a rubber ring gasket (12) is provided at one end of the stop ring (11) facing the piston (4).

3. The spring shock absorber according to claim 2, characterized in that: The rubber ring gasket (12) is provided with a metal ring gasket (13) at the end facing the piston (4).

4. The spring shock absorber according to claim 1, characterized in that: The ball head structure includes a ball (14) connected to the piston rod (3), a base (15) and a cover plate (16). The connecting seat (10) has an installation groove. The base (15) and the cover plate (16) can hold the ball (14) together and place it in the installation groove. The ball (14) can rotate. The groove opening of the installation groove is provided with a fixing plate (17) fixed to the connecting seat (10).

5. The spring shock absorber according to claim 4, characterized in that: The bottom of the mounting groove is provided with a threaded through hole, and a screw plug (18) is connected to the threaded through hole. The base (15) is provided with a through hole that communicates with the threaded through hole. The base (15) and the ball head are filled with grease.

6. The spring damper according to claim 1, characterized in that: A cylinder liner (19) is connected to the second mounting plate (6), and the cylinder liner (19) is fitted onto the cylinder body (1).

7. The spring shock absorber according to claim 6, characterized in that: The cylinder liner (19) is fixed with a first ring body (20) at one end away from the second mounting plate (6). The first ring body (20) is connected to a second ring body (21) that slides along the surface of the cylinder body (1). The second ring body (21) is provided with a scraper sleeve (22) that slides along the cylinder body (1).

8. The spring damper according to claim 1, characterized in that: The sealing head (2) is equipped with a shaft seal (23) and a wear-resistant sleeve (24) fitted onto the piston rod (3).

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