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] The present invention relates to the field of automotive shock absorbers, and particularly to the structure of the rebound middle cylinder assembly of automotive shock absorbers. Background Art

[0002] The existing rebound middle cylinder assembly is integrally welded and formed. A wave spring plate and a valve plate are arranged between the axial ends of the middle cylinder and the end cover to form a one-way valve. The patent document with the publication number CN 220828465 U discloses a double-valve controlled semi-active shock absorber. In this patent, since the middle cylinder fixed seat and the middle cylinder press-fit end cover are fixed by interference fit and then welded, the one-way valve structure is non-detachable. During the performance debugging stage of the shock absorber, the spring plate and the valve plate in the one-way valve cannot be replaced according to the performance debugging requirements, which affects the performance of the shock absorber.

[0003] Therefore, a middle cylinder assembly structure that can freely replace the parts in the one-way valve according to the performance debugging requirements is needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a structure of the rebound middle cylinder assembly of an automotive shock absorber in view of the corresponding deficiencies of the prior art. This middle cylinder assembly structure solves the problem that the pre-pressure of the one-way valve cannot be adjusted during the performance debugging of the shock absorber and improves the performance of the shock absorber.

[0005] The purpose of the present invention is achieved by the following solution: A structure of the rebound middle cylinder assembly of an automotive shock absorber includes a middle cylinder. The front end of the middle cylinder is welded to the middle cylinder end cover, and the rear end of the middle cylinder is welded to the middle cylinder connection seat. A sealing seat is arranged in the through hole at the lower end of the middle cylinder. The centers of the middle cylinder end cover, the middle cylinder, and the middle cylinder connection seat are on the same axis. The inner hole of the middle cylinder connection seat is a stepped hole. The two ends of the inner hole of the middle cylinder connection seat are small-diameter holes, and the middle section of the inner hole of the middle cylinder connection seat is a large-diameter hole. An external thread is arranged at the lower end of the middle section of the outer circumference of the middle cylinder connection seat. The rear end of the middle cylinder connection seat is connected and fixed to the middle cylinder press-fit end cover. The centers of the middle cylinder press-fit end cover and the middle cylinder connection seat are 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, and the second inner hole is threadedly connected and fixed to the lower end of the middle section of the outer circumference of the middle cylinder connection seat. A spring plate and a valve plate are arranged between the lower end face of the middle cylinder connection 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 arranged at the upper end of the middle section of the outer circumference of the middle cylinder connection seat, and a first sealing ring is installed in the first sealing groove. The first inner hole of the middle cylinder press-fit end cover and the middle cylinder connection seat are sealed by the first sealing ring.

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

[0008] A plurality of oil grooves are evenly arranged on the circumferential surface of the end face of the third inner hole of the middle cylinder press-fitted end cover, and two milling flats are arranged on the outer circumferential surface of the middle cylinder press-fitted end cover.

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

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

[0011] The end face of the third inner hole of the middle cylinder press-fitted end cover 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 plate is a corrugated spring plate.

[0014] The advantages of the present invention are that the structure of the rebound middle cylinder assembly of this automotive shock absorber is simple and convenient to use. The middle cylinder connecting seat and the middle cylinder press-fitted end cover are of a threaded sealing connection structure, enabling the check valve to be designed as an adjustable structure. Different specifications of corrugated spring plates can be replaced to adjust the pre-pressure of the spring plate, improving the sealing and oil compensation functions of the check valve, solving the problem that the pre-pressure of the check valve is not adjustable during the performance debugging process of the shock absorber, and enhancing the performance of the shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of some components of the middle cylinder; Figure 3 is a top view of the middle cylinder press-fitted end cover; Figure 4 is a cross-sectional view of the middle cylinder press-fitted end cover; Figure 5 is a side view of the middle cylinder end cover; Figure 6 is an assembly schematic diagram of the structure of the rebound middle cylinder assembly in the shock absorber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] As Figures 1 to 6As shown in the figure, a structure of a rebound middle cylinder assembly of an automotive shock absorber includes a middle cylinder 2. The front end of the middle cylinder 2 is welded to a middle cylinder end cover 1, and the rear end of the middle cylinder 2 is welded to a middle cylinder connection seat 3. A seal seat 9 is arranged in a through hole 10 at the lower end of the middle cylinder 2. The seal seat 9 is welded to the middle cylinder 2, and the outer diameter of the seal seat 9 is the same as the diameter of the through hole 10. The centers of the middle cylinder end cover 1, the middle cylinder 3, and the middle cylinder connection seat 3 are located on the same axis. A first seal groove is arranged at the upper end of the middle section of the outer circumference of the middle cylinder connection seat 3, and a first sealing ring 8 is installed in the first seal groove. The first inner hole 4-1 of the middle cylinder press-fitting end cover 4 and the middle cylinder connection seat 3 are sealed by the first sealing ring 8. The outer circumference of the middle cylinder end cover 1 is a hexagonal structure, and a second seal 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 seal groove. The inner hole of the middle cylinder connection seat 3 is a stepped hole. The two ends of the inner hole of the middle cylinder connection seat 3 are small-diameter holes, and the middle section of the inner hole of the middle cylinder connection seat 3 is a large-diameter hole. This stepped hole with a large middle and small ends can reduce the weight of the part, which is beneficial to lightweight design, and at the same time increases the oil storage space of the middle cylinder. An external thread is arranged at the lower end of the middle section of the outer circumference of the middle cylinder connection seat 3. The rear end of the middle cylinder connection seat 3 is connected and fixed to the middle cylinder press-fitting end cover 4. The centers of the middle cylinder press-fitting end cover 4 and the middle cylinder connection seat 3 are located on the same axis. The inner hole of the middle cylinder press-fitting end cover 4 is a stepped hole, and 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 to the lower end of the middle section of the outer circumference of the middle cylinder connection seat 3. A spring sheet 5 and a valve sheet 7 are arranged between the lower end face of the middle cylinder connection seat 3 and the third inner hole 4-3 of the middle cylinder press-fitting end cover 4 to form a check valve. 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 in clearance fit. The spring sheet 5 is a corrugated spring sheet. A plurality of oil passing grooves 4-4 are evenly arranged in the circumferential direction of the end face of the third inner hole 4-3 of the middle cylinder press-fitting end cover 4. Two milling flats 4-5 are arranged on the outer circumference of the middle cylinder press-fitting end cover 4, and the milling flats 4-5 are used for fixing when the middle cylinder assembly is screwed tightly. A third seal groove is arranged in the fourth inner hole 4-6 of the middle cylinder press-fitting end cover 4, and a third sealing ring 6 is installed in the third seal groove. 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.

[0017] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Without departing from the spirit of the present invention, any modifications made by those skilled in the art fall within the protection scope of the present invention.

Claims

1. A restoring middle cylinder assembly structure of an automobile shock absorber, comprising a middle cylinder (2), wherein the front end of the middle cylinder (2) is welded to the middle cylinder end cover (1), and the rear end of the middle cylinder (2) is welded to the middle cylinder connecting seat (3), a sealing seat (9) is arranged in a through hole (10) at the lower end of the middle cylinder (2), and the centers of the middle cylinder end cover (1), the middle cylinder (3) and the middle cylinder connecting seat (3) are located on the same axis, characterized in that: The inner hole of the middle cylinder connection seat (3) is a stepped hole, both ends of the inner hole of the middle cylinder connection seat (3) are small diameter holes, the middle section of the inner hole of the middle cylinder connection seat (3) is a large diameter hole, an external thread is arranged at the lower end of the middle section of the outer circumference of the middle cylinder connection seat (3), the rear end of the middle cylinder connection seat (3) is connected and fixed to the middle cylinder press-fit end cover (4), the center of the middle cylinder press-fit end cover (4) and the middle cylinder connection seat (3) are located on the same axis, the inner hole of the middle cylinder press-fit end cover (4) is a stepped hole, the second inner hole (4-2) of the middle cylinder press-fit end cover (4) is a threaded hole, the second inner hole (4-2) is threadedly connected and fixed to the lower end of the middle section of the outer circumference of the middle cylinder connection seat (3), and a spring sheet (5) and a valve sheet (7) are arranged between the lower end surface of the middle cylinder connection seat (3) and the third inner hole (4-3) of the middle cylinder press-fit end cover (4) to form a one-way valve.

2. The restoration middle cylinder assembly structure of the automobile shock absorber according to claim 1, characterized in that: A first sealing groove is provided at the upper end of the middle section of the outer circumference of the middle cylinder connection seat (3), a first sealing ring (8) is installed in the first sealing groove, and the first inner hole (4-1) of the middle cylinder press-fit end cover (4) and the middle cylinder connection seat (3) are sealed via the first sealing ring (8).

3. The restoration middle tube assembly structure of the automobile shock absorber according to claim 1, characterized in that: The outer circumference of the middle cylinder end cover (1) is a hexagonal structure, 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 restoration middle cylinder assembly structure of the automobile shock absorber according to claim 1, characterized in that: A plurality of oil-passing grooves (4-4) are evenly arranged on the circumference of the end surface of the third inner hole (4-3) of the middle cylinder press-fit end cover (4), and two milling flattening locations (4-5) are arranged on the outer circumference of the middle cylinder press-fit end cover (4).

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

6. The restoration middle tube assembly structure of the automobile shock absorber according to claim 1, characterized in that: The valve plate (7) is fitted with the end surface of the third inner hole (4-3) of the middle cylinder press-fit end cover (4), the spring plate (5) is fitted with the valve plate (7), and the valve plate (7), the spring plate (5) and the third inner hole (4-3) are clearance-matched.

7. The restoration middle cylinder assembly structure of the automobile shock absorber according to claim 1, characterized in that: The end surface of the third inner hole (4-3) of the middle cylinder press-fit end cover (4) is a narrow valve line surface.

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

9. The restoration middle tube assembly structure of the automobile shock absorber according to claim 1, characterized in that: The spring sheet (5) is a wave spring sheet.

Images