Restoration middle cylinder assembly structure of automobile shock absorber

Abstract

A recovery middle cylinder assembly structure of an automobile shock absorber comprises a middle cylinder, the front end of the middle cylinder is connected with a middle cylinder end cover in a welded mode, the rear end of the middle cylinder is connected with a middle cylinder connecting base in a welded mode, a sealing base is arranged in a through hole in the lower end of the middle cylinder, the center of the middle cylinder end cover, the center of the middle cylinder and the center of the middle cylinder connecting base are located on the same axis, and an inner hole of the middle cylinder connecting base is a stepped hole. Small-diameter holes are formed in the two ends of an inner hole of the middle cylinder connecting base, a large-diameter hole is formed in the middle section of the inner hole of the middle cylinder connecting base, external threads are arranged at the lower end of the middle section of the outer circumference of the middle cylinder connecting base, the rear end of the middle cylinder connecting base is fixedly connected with the middle cylinder press-fitting end cover, and the center of the middle cylinder press-fitting end cover and the center of the middle cylinder connecting base are located on the same axis. An inner hole of the middle cylinder press-fitting end cover is a stepped hole, a second inner hole of the middle cylinder press-fitting end cover is a threaded hole, the second inner hole is fixedly connected with the lower end of the middle section of the outer circumference of the middle cylinder connecting seat in a threaded mode, and a spring piece and a valve piece are arranged between the end face of the lower end of the middle cylinder connecting seat and a third inner hole of the middle cylinder press-fitting end cover to form a one-way valve.

Description

Technical Field

[0001] This utility model relates to the field of automotive shock absorbers, specifically to the structure of the recovery cylinder assembly of automotive shock absorbers. Background Technology

[0002] The existing recovery cylinder assembly is integrally welded, with a wave spring and valve plate forming a one-way valve between the axial ends of the cylinder and the end cap. Patent document CN 220828465 U discloses a dual-valve controlled semi-active vibration damper. In this patent, because the cylinder fixing seat and the cylinder press-fit end cap are interference-fitted and then welded together, the one-way valve structure is non-removable. During the vibration damper performance debugging stage, the spring and valve plate inside the one-way valve cannot be replaced according to performance debugging requirements, affecting the vibration damper performance.

[0003] Therefore, a middle cylinder assembly structure is needed that allows for the easy replacement of parts within the one-way valve according to performance tuning requirements. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a restorative middle cylinder assembly structure for automotive shock absorbers. This middle cylinder assembly structure solves the problem of the unadjustable pre-pressure of the one-way valve during shock absorber performance tuning, thereby improving the performance of the shock absorber.

[0005] The purpose of this utility model is achieved by the following solution: a restoring middle cylinder assembly structure for an automotive shock absorber, comprising a middle cylinder, the front end of which is welded to a middle cylinder end cap, the rear end of which is welded to a middle cylinder connecting seat, a sealing seat disposed in the lower end through hole of the middle cylinder, the centers of the middle cylinder end cap, the middle cylinder, and the middle cylinder connecting seat being located on the same axis, the inner hole of the middle cylinder connecting seat being a stepped hole, the two ends of the inner hole of the middle cylinder connecting seat being small-diameter holes, and the middle section of the inner hole of the middle cylinder connecting seat being a large-diameter hole. The lower end of the middle section of the outer circumference of the middle cylinder connecting seat is provided with an external thread. The rear end of the middle cylinder connecting seat is connected and fixed to the middle cylinder press-fit end cover. The center of the middle cylinder press-fit end cover and the middle cylinder connecting seat are located on the same axis. The inner hole of the middle cylinder press-fit end cover is a stepped hole. The second inner hole of the middle cylinder press-fit end cover is a threaded hole. The second inner hole is threaded and fixed to the lower end of the middle section of the outer circumference of the middle cylinder connecting seat. A spring plate and a valve plate are provided between the lower end face of the middle cylinder connecting seat and the third inner hole of the middle cylinder press-fit end cover to form a one-way valve.

[0006] A first sealing groove is provided at the upper end of the middle section of the outer circumference of the middle cylinder connecting seat, and a first sealing ring is installed in the first sealing groove. The first inner hole of the middle cylinder press-fit end cap is sealed to the middle cylinder connecting seat through the first sealing ring.

[0007] The outer circumference of the middle cylinder end cap is hexagonal, and a second sealing groove is provided in the inner hole of the middle cylinder end cap, in which a second sealing ring is installed.

[0008] The third inner hole end face of the middle cylinder press-fit end cap is evenly provided with multiple oil grooves, and the outer circumference of the middle cylinder press-fit end cap is provided with two milled flats.

[0009] A third sealing groove is provided in the fourth inner hole of the middle cylinder press-fit end cap, and a third sealing ring is installed in the third sealing groove.

[0010] The valve plate is fitted to the end face of the third inner hole of the press-fit end cap of the middle cylinder, and the spring plate is fitted to the valve plate. The valve plate, the spring plate and the third inner hole are fitted with a clearance.

[0011] The end face of the third inner hole of the press-fit end cap of the middle cylinder is a narrow valve line face.

[0012] The sealing seat is welded to the middle cylinder, and the outer diameter of the sealing seat is the same as the diameter of the through hole.

[0013] The spring sheet is a wave-shaped spring sheet.

[0014] The advantages of this utility model are that the recovery cylinder assembly of this automotive shock absorber has a simple structure and is easy to use. The cylinder connecting seat and the cylinder press-fit end cap are connected by a threaded seal, which makes the one-way valve adjustable. Different specifications of wave springs can be replaced, and the pre-pressure of the springs can be adjusted to improve the sealing and oil compensation functions of the one-way valve. This solves the problem of the one-way valve pre-pressure not being adjustable during the shock absorber performance debugging process and improves the shock absorber performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the component structure of the middle tube section;

[0017] Figure 3 Top view of the press-fitted end cap of the middle cylinder;

[0018] Figure 4 This is a sectional view of the press-fitted end cap of the middle cylinder;

[0019] Figure 5 This is a side view of the middle cylinder end cap;

[0020] Figure 6 This is a schematic diagram showing the assembly of the middle cylinder component in the vibration damper. Detailed Implementation

[0021] like Figures 1 to 6As shown, a recovery cylinder assembly structure for an automotive shock absorber includes a cylinder 2. The front end of the cylinder 2 is welded to a cylinder end cap 1, and the rear end of the cylinder 2 is welded to a cylinder connecting seat 3. A sealing seat 9 is provided in a through hole 10 at the lower end of the cylinder 2. The sealing seat 9 is welded to the cylinder 2, and the outer diameter of the sealing seat 9 is the same as the diameter of the through hole 10. The centers of the cylinder end cap 1, the cylinder 2, and the cylinder connecting seat 3 are located on the same axis. A first sealing groove is provided at the upper end of the middle section of the outer circumference of the cylinder connecting seat 3, and a first sealing ring 8 is installed in the first sealing groove. The first inner hole 4-1 of the cylinder press-fit end cap 4 is sealed to the cylinder connecting seat 3 by the first sealing ring 8. The outer circumference of the cylinder end cap 1 is hexagonal, and a second sealing groove is provided in the inner hole of the cylinder end cap 1, and a second sealing ring 11 is installed in the second sealing groove. The inner hole of the middle cylinder connecting seat 3 is a stepped hole, with small-diameter holes at both ends and a large-diameter hole in the middle section. This stepped hole, with a larger diameter in the middle and smaller diameter at both ends, reduces the weight of the parts, which is beneficial for lightweight design, and also increases the oil storage space of the middle cylinder. An external thread is provided at the lower end of the middle section of the outer circumference of the middle cylinder connecting seat 3. The rear end of the middle cylinder connecting seat 3 is connected and fixed to the middle cylinder press-fit end cap 4. The centers of the middle cylinder press-fit end cap 4 and the middle cylinder connecting seat 3 are located on the same axis. The inner hole of the middle cylinder press-fit end cap 4 is a stepped hole, and the second inner hole 4-2 of the middle cylinder press-fit end cap 4 is a threaded hole. The second inner hole 4-2 is threaded and fixed to the lower end of the middle section of the outer circumference of the middle cylinder connecting seat 3. A spring plate 5 and a valve plate 7 are provided between the lower end face of the middle cylinder connecting seat 3 and the third inner hole 4-3 of the middle cylinder press-fit end cap 4 to form a one-way valve. The valve plate 7 is fitted to the end face of the third inner hole 4-3 of the press-fit end cap 4, and the spring plate 5 is fitted to the valve plate 7. The valve plate 7, the spring plate 5, and the third inner hole 4-3 are clearance-fitted. The spring plate 5 is a wave spring plate. Multiple oil passage grooves 4-4 are evenly arranged around the circumference of the end face of the third inner hole 4-3 of the press-fit end cap 4. Two milled flats 4-5 are provided on the outer circumference of the press-fit end cap 4. The milled flats 4-5 are used for fixing when the thread of the middle cylinder assembly is tightened. A third sealing groove is provided in the fourth inner hole 4-6 of the press-fit end cap 4, and a third sealing ring 6 is installed in the third sealing groove. The end face of the third inner hole 4-3 of the press-fit end cap 4 is a narrow valve line surface.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A recovery cylinder assembly structure for an automotive shock absorber, comprising a cylinder (2), wherein the front end of the cylinder (2) is welded to a cylinder end cap (1), the rear end of the cylinder (2) is welded to a cylinder connecting seat (3), a sealing seat (9) is provided in the lower end through hole (10) of the cylinder (2), and the centers of the cylinder end cap (1), the cylinder (2), and the cylinder connecting seat (3) are located on the same axis, characterized in that: The inner hole of the middle cylinder connecting seat (3) is a stepped hole, the two ends of the inner hole of the middle cylinder connecting seat (3) are small-diameter holes, the middle section of the inner hole of the middle cylinder connecting seat (3) is a large-diameter hole, the middle section of the outer circumference of the middle cylinder connecting seat (3) is provided with external threads at the lower end, the rear end of the middle cylinder connecting seat (3) is connected and fixed with the middle cylinder press-fitting end cover (4), the center of the middle cylinder press-fitting end cover (4) and the middle cylinder connecting seat (3) are located on the same axis, the inner hole of the middle cylinder press-fitting end cover (4) is a stepped hole, the second inner hole (4-2) of the middle cylinder press-fitting end cover (4) is a threaded hole, the second inner hole (4-2) is threadedly connected and fixed with the middle section of the outer circumference of the middle cylinder connecting seat (3) at the lower end, and the lower end face of the middle cylinder connecting seat (3) and the third inner hole (4-3) of the middle cylinder press-fitting end cover (4) are provided with spring sheets (5) and valve sheets (7) to form a one-way valve.

2. The restoring middle tube assembly structure of an automobile shock absorber according to claim 1, characterized in that: The middle section of the outer circumference of the middle cylinder connecting seat (3) is provided with a first sealing groove at the upper end, and a first sealing ring (8) is installed in the first sealing groove.

3. The restoring middle tube assembly structure of an automobile shock absorber according to claim 1, characterized in that: The outer circumference of the middle cylinder end cover (1) is a hexagonal structure, and a second sealing groove is arranged in the inner hole of the middle cylinder end cover (1), and a second sealing ring (11) is installed in the second sealing groove.

4. The restoring middle tube assembly structure of an automobile shock absorber according to claim 1, characterized in that: The third inner hole (4-3) of the middle cylinder press-fitting end cover (4) is uniformly provided with a plurality of oil passing grooves (4-4) on the end face, and the outer circumference of the middle cylinder press-fitting end cover (4) is provided with two milled flats (4-5).

5. The restoring middle tube assembly structure of an automobile shock absorber according to claim 1, characterized by: The fourth inner hole (4-6) of the middle cylinder press-fitting end cover (4) is provided with a third sealing groove, and a third sealing ring (6) is installed in the third sealing groove.

6. The restoring middle tube assembly structure of an automobile shock absorber according to claim 1, characterized by: The valve sheet (7) is attached to the end face of the third inner hole (4-3) of the middle cylinder press-fitting end cover (4), the spring sheet (5) is attached to the valve sheet (7), and the valve sheet (7), the spring sheet (5) and the third inner hole (4-3) are gap-fitted.

7. The restoring middle tube assembly structure of an automobile shock absorber according to claim 1, characterized by: The end face of the third inner hole (4-3) of the middle cylinder press-fitting end cover (4) is a narrow valve line face.

8. The restoring middle tube assembly structure of an automobile shock absorber according to claim 1, characterized by: The sealing seat (9) is welded and connected with the middle cylinder (2), and the outer circle diameter of the sealing seat (9) is the same as the diameter of the through hole (10).

9. The restoring middle tube assembly structure of an automobile shock absorber according to claim 1, characterized by: The spring sheet (5) is a wave-shaped spring sheet.

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