Shock absorber spring preloading force hydraulic adjusting device

Abstract

The utility model discloses a shock absorber spring preloading force hydraulic adjusting device which comprises an upper spring abutting cap and a lower spring abutting cap, a spring is arranged between the upper spring abutting cap and the lower spring abutting cap, one end, away from the spring, of the lower spring abutting cap is connected with a supporting seat in a sliding and clamping mode, and the outer wall of the bottom of one side of the supporting seat is fixedly connected with one end of a connecting pipe. The other end of the connecting pipe is fixedly connected with the outer wall of the bottom of one side of the barrel, the center of the top end of the barrel is sleeved with a threaded rod through a threaded structure, one end of the threaded rod rotationally extends into the barrel, then the end of the threaded rod is rotationally connected with a piston, the piston is slidably sleeved with the barrel, and the other end of the threaded rod is fixedly connected with an adjusting cap. The threaded rod is driven to rotate through the adjusting cap, the threaded rod drives the piston with the end rotationally connected through the threaded structure to linearly move in the cylinder, and when the piston extrudes oil in the cylinder, the oil enters the cavity of the supporting base through the connecting pipe, and then the pressure of the oil passes.

Description

Technical Field

[0001] This utility model relates to the field of vehicle suspension shock absorber technology, specifically a shock absorber spring preload hydraulic adjustment device. Background Technology

[0002] To rapidly dampen vibrations between the chassis and body, improving ride smoothness and comfort, shock absorbers are installed in automotive suspension systems. The damping effect of these shock absorbers directly impacts ride stability and the lifespan of other components. Currently, shock absorber spring preload adjustment in China is mostly done using tools, which limits adjustment space due to installation limitations and requires specialized tools, resulting in poor ease of adjustment and a subpar user experience. Therefore, we propose a hydraulic adjustment device for shock absorber spring preload to address these issues. Utility Model Content

[0003] The purpose of this invention is to provide a hydraulic adjustment device for the preload of a shock absorber spring, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic adjustment device for the preload of a shock absorber spring, comprising an upper spring abutment cap and a lower spring abutment cap, wherein a spring is provided between the upper and lower spring abutment caps, and a support seat is slidably engaged at the end of the lower spring abutment cap away from the spring. One end of a connecting pipe is fixedly connected to the bottom outer wall of one side of the support seat, and the other end of the connecting pipe is fixedly connected to the bottom outer wall of one side of a cylinder. A threaded rod is threadedly sleeved at the center of the top of the cylinder through a threaded structure. After one end of the threaded rod rotates and extends into the cylinder, the end of the threaded rod is slidably connected to a piston. The piston is slidably sleeved into the cylinder, and an adjustment cap is fixedly connected to the other end of the threaded rod.

[0005] Preferably, one end of a connecting column is fixedly connected to the top outer wall of one side of the cylinder, and the other end of the connecting column is fixedly connected to the top outer wall of one side of the support base.

[0006] Preferably, the connecting post is arranged parallel to the connecting pipe.

[0007] Preferably, a sealing ring 2 is fixedly connected to the top wall of the cylinder.

[0008] Preferably, the support base has a hollow cavity inside, and a movable tube is slidably sleeved in the cavity. One end of the movable tube is fixedly connected to the end of the lower spring abutment cap away from the spring, and the other end of the movable tube is fixedly sleeved with an anti-detachment ring, which is movably disposed in the cavity.

[0009] Preferably, the threaded rod is threaded with a locking nut, which is located between the adjusting cap and the cylinder.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the adjusting cap drives the threaded rod to rotate, and the threaded rod drives the piston connected to the end to move linearly in the cylinder through the threaded structure. When the piston squeezes the oil in the cylinder, the oil enters the cavity of the support seat through the connecting pipe. Then, through the liquid pressure, the lower spring abutting cap moves away from the support seat, thereby increasing the preload of the spring. Conversely, the piston moves linearly in the opposite direction, and the oil in the cavity of the support seat is drawn out through the connecting pipe. The oil enters the cylinder, thereby causing the lower spring abutting cap to move closer to the support seat, thereby reducing the preload of the spring. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0013] In the diagram: Upper spring support cap 1, spring 2, lower spring support cap 3, movable tube 31, anti-detachment ring 32, support seat 4, cavity 41, sealing ring one 42, connecting tube 5, cylinder 6, sealing ring two 61, connecting column 7, threaded rod 8, adjusting cap 9, anti-reverse nut 10, piston 11, oil 12. Detailed Implementation

[0014] 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. Example 1

[0015] Reference Figure 1 , 2 This is the first embodiment of the present invention. This embodiment provides a hydraulic adjustment device for the preload of a shock absorber spring, including an upper spring abutment cap 1 and a lower spring abutment cap 3. A spring 2 is provided between the upper spring abutment cap 1 and the lower spring abutment cap 3. A support seat 4 is slidably engaged at the end of the lower spring abutment cap 3 away from the spring 2. One end of a connecting pipe 5 is fixedly connected to the bottom outer wall of one side of the support seat 4. The other end of the connecting pipe 5 is fixedly connected to the bottom outer wall of one side of the cylinder 6. A threaded rod 8 is threadedly sleeved at the center of the top of the cylinder 6. After one end of the threaded rod 8 is rotated and extended into the cylinder 6, the end of the threaded rod 8 is rotatably connected to a piston 11. The piston 11 is slidably sleeved inside the cylinder 6. An adjustment cap 9 is fixedly connected to the other end of the threaded rod 8.

[0016] By rotating the adjusting cap 9 using a tool (such as a wrench), the adjusting cap 9 drives the threaded rod 8 to rotate. The threaded rod 8 drives the piston 11, which is connected to the end of the threaded structure, to move linearly within the cylinder 6. When the piston 11 squeezes the oil 12 within the cylinder 6, the oil 12 enters the cavity 41 of the support seat 4 through the connecting pipe 5. The liquid pressure then causes the lower spring holding cap 3 to move away from the support seat 4, thereby increasing the preload force on the spring 2. Conversely, the piston 11 moves linearly in the opposite direction, drawing out the oil 12 from the cavity 41 of the support seat 4 through the connecting pipe 5. The oil 12 enters the cylinder 6, causing the lower spring holding cap 3 to move closer to the support seat 4, thereby reducing the preload force on the spring 2. Example 2

[0017] Reference Figure 1 , 2 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment. Specifically, one end of the connecting column 7 is fixedly connected to the top outer wall of one side of the cylinder 6, and the other end of the connecting column 7 is fixedly connected to the top outer wall of one side of the support base 4. The setting of the connecting column 7 improves the stability of the cylinder 6 during installation.

[0018] Furthermore, the connecting column 7 and the connecting pipe 5 are arranged in parallel. This parallel arrangement ensures that the connecting column 7 and the connecting pipe 5 are installed in the same position, which facilitates processing operations.

[0019] Specifically, a sealing ring 61 is fixedly connected to the top wall inside the cylinder 6. The setting of the sealing ring 61 improves the sealing performance at the connection between the threaded rod 8 and the cylinder 6. The inside of the cylinder 6 is filled with oil 12.

[0020] Specifically, the support base 4 has a hollow cavity 41 inside, and a movable tube 31 is slidably sleeved inside the cavity 41. One end of the movable tube 31 is fixedly connected to the end of the lower spring abutment cap 3 away from the spring 2, and the other end of the movable tube 31 is fixedly sleeved with an anti-detachment ring 32. The anti-detachment ring 32 is movably disposed in the cavity 41, and the cavity 41 is filled with oil 12. The cavity 41 is connected to the inside of the cylinder 6 through the connecting pipe 5 to realize the flow of oil 12.

[0021] Specifically, a locking nut 10 is threaded onto the external thread of the threaded rod 8. The locking nut 10 is located between the adjusting cap 9 and the cylinder 6. First, the locking nut 10 is rotated to move away from the cylinder 6, thus unlocking the threaded rod 8 and allowing it to rotate. After the preload of the spring 2 is adjusted, the locking nut 10 is manually rotated in the opposite direction using a tool, causing it to move towards the cylinder 6. When the locking nut 10 is attached to the outer wall of the cylinder 6, the position of the threaded rod 8 is limited and fixed to prevent vibration or the liquid pressure of the oil 12 from causing the threaded rod 8 to reverse and retract.

[0022] First, using a tool (such as a wrench), rotate the locking nut 10 to move it away from the cylinder 6, unlocking the threaded rod 8 and allowing it to rotate. Then, manually rotate the adjusting cap 9, which drives the threaded rod 8 to rotate. The threaded rod 8, through its threaded structure, drives the piston 11, connected to its end, to move linearly within the cylinder 6. When the piston 11 squeezes the oil 12 within the cylinder 6, the oil 12 enters the cavity 41 of the support seat 4 through the connecting pipe 5. The liquid pressure then causes the lower spring to push the cap 3 away from the support seat 4. The piston 11 moves to increase the preload of spring 2; conversely, the piston 11 moves in the opposite direction, drawing oil 12 from the cavity 41 of the support seat 4 through the connecting pipe 5. The oil 12 enters the cylinder 6, causing the lower spring abutment cap 3 to move towards the support seat 4, thereby reducing the preload of spring 2. After the preload of spring 2 is adjusted, the anti-reverse nut 10 is manually rotated in the opposite direction using a tool, causing the anti-reverse nut 10 to move towards the cylinder 6. When the anti-reverse nut 10 is attached to the outer wall of the cylinder 6, the position of the threaded rod 8 is limited and fixed to prevent vibration or the liquid pressure of the oil 12 from causing the threaded rod 8 to reverse and retract.

[0023] 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. A hydraulic adjustment device for the preload of a shock absorber spring, comprising an upper spring abutment cap (1) and a lower spring abutment cap (3), wherein a spring (2) is provided between the upper spring abutment cap (1) and the lower spring abutment cap (3), characterized in that: The lower spring abutment cap (3) is slidably engaged with a support seat (4) at one end away from the spring (2). One end of a connecting pipe (5) is fixedly connected to the bottom outer wall of one side of the support seat (4). The other end of the connecting pipe (5) is fixedly connected to the bottom outer wall of one side of the cylinder (6). The top center of the cylinder (6) is connected to a threaded rod (8) through a threaded structure. After one end of the threaded rod (8) is rotated into the cylinder (6), the end of the threaded rod (8) is rotatably connected to a piston (11). The piston (11) is slidably engaged in the cylinder (6). The other end of the threaded rod (8) is fixedly connected to an adjusting cap (9).

2. The hydraulic adjustment device for the preload of a shock absorber spring according to claim 1, characterized in that: One end of the connecting column (7) is fixedly connected to the top outer wall of one side of the cylinder (6), and the other end of the connecting column (7) is fixedly connected to the top outer wall of one side of the support base (4).

3. The hydraulic adjustment device for the preload of a shock absorber spring according to claim 2, characterized in that: The connecting column (7) is arranged parallel to the connecting pipe (5).

4. The hydraulic adjustment device for the preload of a shock absorber spring according to claim 1, characterized in that: A sealing ring 2 (61) is fixedly connected to the top wall inside the cylinder (6).

5. The hydraulic adjustment device for the preload of a shock absorber spring according to claim 1, characterized in that: The support base (4) has a hollow cavity (41) inside. A movable tube (31) is slidably sleeved inside the cavity (41). One end of the movable tube (31) is fixedly connected to the end of the lower spring abutment cap (3) away from the spring (2). The other end of the movable tube (31) is fixedly sleeved with an anti-detachment ring (32). The anti-detachment ring (32) is movably disposed inside the cavity (41).

6. The hydraulic adjustment device for the preload of a shock absorber spring according to claim 1, characterized in that: The threaded rod (8) is externally threaded with a backstop nut (10), which is located between the adjusting cap (9) and the cylinder (6).

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