A valve seat for a hydraulic buffer mechanism of a vehicle shock absorber

Abstract

The present invention discloses a valve seat for a hydraulic buffer mechanism of a vehicle shock absorber. The outer cylindrical surface at the upper end of the valve seat has a conical surface, a stepped hole is formed on the central axis of the valve seat, and an annular groove is formed in the stepped hole. Upper and lower countersunk holes are evenly distributed at the upper and lower ends of the outer cylindrical surface of the valve seat. The upper and lower countersunk holes form a passage. Because the countersunk holes are arranged on the outer cylindrical surface of the valve seat, they avoid the position of mutual impact, thereby increasing the contact area of ​​the impact and reducing the pressure on the valve seat. The present invention, through a valve seat for a hydraulic buffer mechanism of a vehicle shock absorber, solves the technical problems of damage caused by mutual impact between the valve body and the valve seat in the prior art and shortening the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle vibration reduction, and in particular to a valve seat for a hydraulic buffer mechanism of a vehicle shock absorber. Background Art

[0002] A vehicle's oil-based shock absorber features a hydraulic buffer structure at the end of compression. While the vehicle is in motion, the shock absorber absorbs the vehicle's vibration energy, providing a damping force that balances both suspension comfort and handling. When the vehicle encounters large-amplitude motions, such as bumps on the road or during emergency braking, the shock absorber moves downward rapidly. The damping force generated by the hydraulic buffer mechanism offsets the impact, preventing it from affecting vehicle comfort and handling. In the event of excessive impact, the valve body and valve seat of the hydraulic buffer structure may collide, causing damage. Summary of the Invention

[0003] The object of the present invention is to provide a valve seat for a hydraulic buffer mechanism of a vehicle shock absorber, so as to solve the technical problems in the prior art of damage and short service life caused by collision between the valve body and the valve seat.

[0004] To achieve the above-mentioned purpose, the present invention provides a valve seat for the hydraulic buffer mechanism of a vehicle shock absorber, wherein the outer cylindrical surface of the upper end of the valve seat is provided with a conical surface, a step hole is provided on the central axis of the valve seat, an annular groove is provided on the step hole, and upper and lower ends of the outer cylindrical surface of the valve seat are respectively provided with upper countersunk holes and lower countersunk holes; the upper countersunk holes and lower countersunk holes form a passage.

[0005] Furthermore, the upper countersunk hole is communicated with the conical surface, and the lower countersunk hole is communicated with the annular groove.

[0006] Furthermore, a hydraulic buffer inner tube is provided above the valve seat, and the hydraulic buffer inner tube is connected to the inner wall of the large diameter end of the step hole through an interference fit.

[0007] Furthermore, a bottom valve assembly is provided below the valve seat, a valve plate is provided on the bottom valve assembly, and the valve plate cooperates with the annular groove.

[0008] Furthermore, the outer wall of the valve seat is connected to the working cylinder through an interference fit, and the working cylinder is coaxial with the hydraulic buffer inner tube.

[0009] Furthermore, a piston, a piston rod and a hydraulic buffer valve body are also provided in the working cylinder. The upper end of the piston is connected to the piston rod, and the lower end of the piston is connected to the hydraulic buffer valve body through a bolt.

[0010] Furthermore, the hydraulic buffer valve body is a cylindrical structure with irregular inner and outer walls. The inner wall of the hydraulic buffer valve body with the smallest inner diameter is clearance-fitted with the outer wall of the hydraulic buffer inner tube, and the outer wall of the hydraulic buffer valve body with the largest outer diameter is clearance-fitted with the inner wall of the working cylinder.

[0011] Furthermore, the outer wall of the lower end of the pressure buffer valve body that is not in contact with the working cylinder forms an annular hydraulic chamber with the working cylinder.

[0012] Based on the above technical solution, the valve seat for the hydraulic buffer mechanism of a vehicle shock absorber provided by the present invention can produce the following beneficial effects:

[0013] (1) The end face of the sinking hole or the annular groove surface cooperates with the valve plate on the bottom valve assembly to form a one-way valve.

[0014] (2) The annular hydraulic cavity formed between the hydraulic buffer inner tube, the hydraulic buffer valve body and the working cylinder generates a compression damping force to offset the impact force.

[0015] (3) The countersunk holes on the outer cylindrical surface of the valve seat avoid the position of mutual collision, which increases the contact area of ​​the collision, reduces the pressure on the hydraulic buffer valve body and the valve seat, and avoids damage to the hydraulic buffer valve body and the valve seat due to collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of an embodiment of the present invention;

[0017] Figure 2 The embodiment of the present invention works Figure 1 ;

[0018] Figure 3 The embodiment of the present invention works Figure 2 ;

[0019] Figure 4 This is a schematic structural diagram of the bottom valve assembly of the present invention;

[0020] In the figure: 1. Working cylinder; 1-1. Annular hydraulic chamber; 2. Piston rod; 3. Piston; 4. Hydraulic buffer valve body; 5. Hydraulic buffer inner tube; 6. Valve seat; 6-1. Conical surface; 6-2. Step hole; 6-3. Upper countersunk hole; 6-4. Lower countersunk hole; 6-5. Annular groove; 7. Bottom valve assembly; 7-1. Valve plate. DETAILED DESCRIPTION

[0021] In order to better understand the purpose, structure and function of the present invention, the valve seat for the hydraulic buffer mechanism of a vehicle shock absorber of the present invention is further described in detail below with reference to the accompanying drawings.

[0022] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] like Figure 1 As shown, the present application is a valve seat for a hydraulic buffer mechanism of a vehicle shock absorber, characterized in that a conical surface 6-1 is provided on the outer cylindrical surface of the upper end of the valve seat 6, a step hole 6-2 is provided on the central axis of the valve seat 6, an annular groove 6-5 is provided on the step hole 6-2, and upper and lower ends of the outer cylindrical surface of the valve seat 6 are respectively evenly provided with upper countersunk holes 6-3 and lower countersunk holes 6-4; the upper countersunk holes 6-3 and the lower countersunk holes 6-4 form a passage.

[0024] The upper countersunk hole 6-3 is connected to the conical surface 6-1, and the lower countersunk hole 6-4 is connected to the annular groove 6-5.

[0025] Specifically, such as Figure 2-4 As shown, a hydraulic buffer inner tube 5 is provided above the valve seat 6, and the hydraulic buffer inner tube 5 is connected to the inner wall of the large diameter end of the step hole 6-2 through interference fit.

[0026] A bottom valve assembly 7 is provided below the valve seat 6 , and a valve plate 7 - 1 is provided on the bottom valve assembly 7 . The valve plate 7 - 1 cooperates with the annular groove 6 - 5 .

[0027] The outer wall of the valve seat 6 is connected to the working cylinder 1 through interference fit, and the working cylinder 1 is coaxial with the hydraulic buffer inner tube 5 .

[0028] A piston 3, a piston rod 2 and a hydraulic buffer valve body 4 are also provided in the working cylinder 1. The upper end of the piston 3 is connected to the piston rod 2, and the lower end of the piston 3 is connected to the hydraulic buffer valve body 4 through bolts.

[0029] The hydraulic buffer valve body 4 is a cylindrical structure with irregular inner and outer walls. The inner wall of the hydraulic buffer valve body 4 with the smallest inner diameter is clearance-fitted with the outer wall of the hydraulic buffer inner tube 5, and the outer wall of the hydraulic buffer valve body 4 with the largest outer diameter is clearance-fitted with the inner wall of the working cylinder 1.

[0030] The outer wall of the lower end of the hydraulic buffer valve body 4 that is not in contact with the working cylinder 1 forms an annular hydraulic chamber 1 - 1 with the working cylinder 1 .

[0031] The specific working principle of the present invention is:

[0032] When the vehicle encounters large-amplitude movements such as road bumps or emergency braking, the shock absorber is subjected to external excitation, the downward movement stroke of the shock absorber becomes larger, the piston rod 2 moves downward, and the piston 3 connected to the lower end of the piston rod 2 drives the hydraulic buffer valve body 4 to move downward in the working cylinder 1. The inner cavity of the hydraulic buffer valve body 4 covers the hydraulic buffer inner tube 5 from above, and the annular hydraulic cavity 1-1 formed between the hydraulic buffer inner tube 5, the hydraulic buffer valve body 4 and the working cylinder 1 generates a compression damping force to offset the impact force.

[0033] When the annular hydraulic chamber 1-1 cannot completely offset the impact force, the lower surface of the hydraulic buffer valve body 4 will collide with the upper surface of the valve seat 6. The countersunk hole 6-3 arranged on the outer cylindrical surface of the valve seat 6 avoids the position of mutual collision, thereby increasing the contact area of ​​the collision, reducing the pressure on the hydraulic buffer valve body 4 and the valve seat 6, and avoiding damage to the hydraulic buffer valve body 4 and the valve seat 6 due to collision.

[0034] It will be appreciated that the present invention has been described with reference to certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the teachings of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A valve seat for a hydraulic buffer mechanism of a vehicle shock absorber, characterized in that: The outer cylindrical surface of the upper end of the valve seat (6) is provided with a conical surface (6-1), a step hole (6-2) is provided on the central axis of the valve seat (6), an annular groove (6-5) is provided on the step hole (6-2), and an upper sink hole (6-3) and a lower sink hole (6-4) are respectively evenly distributed at the upper and lower ends of the outer cylindrical surface of the valve seat (6); the upper sink hole (6-3) and the lower sink hole (6-4) form a passage; A hydraulic buffer inner tube (5) is provided above the valve seat (6), and the hydraulic buffer inner tube (5) is connected to the inner wall of the large diameter end of the step hole (6-2) through an interference fit; The outer wall of the valve seat (6) is connected to the working cylinder (1) through an interference fit, and the working cylinder (1) is coaxial with the hydraulic buffer inner tube (5); The working cylinder (1) is further provided with a piston (3), a piston rod (2) and a hydraulic buffer valve body (4); the upper end of the piston (3) is connected to the piston rod (2), and the lower end of the piston (3) is connected to the hydraulic buffer valve body (4) via a bolt; The hydraulic buffer valve body (4) is a cylindrical structure with irregular inner and outer walls. The inner wall of the hydraulic buffer valve body (4) with the smallest inner diameter is clearance-matched with the outer wall of the hydraulic buffer inner tube (5), and the outer wall of the hydraulic buffer valve body (4) with the largest outer diameter is clearance-matched with the inner wall of the working cylinder (1). The lower surface of the hydraulic buffer valve body (4) will collide with the upper surface of the valve seat (6), and the countersunk hole (6-3) provided on the outer cylindrical surface of the valve seat (6) avoids the position of the mutual collision.

2. A valve seat for a hydraulic buffer mechanism of a vehicle shock absorber according to claim 1, characterized in that: The upper sink hole (6-3) is connected to the conical surface (6-1), and the lower sink hole (6-4) is connected to the annular groove (6-5).

3. The valve seat for a hydraulic buffer mechanism of a vehicle shock absorber according to claim 1, characterized in that: A bottom valve assembly (7) is provided below the valve seat (6), a valve plate (7-1) is provided on the bottom valve assembly (7), and the valve plate (7-1) cooperates with the annular groove (6-5).

4. The valve seat for a hydraulic buffer mechanism of a vehicle shock absorber according to claim 1, characterized in that: The outer wall of the lower end of the hydraulic buffer valve body (4) that is not in contact with the working cylinder (1) forms an annular hydraulic cavity (1-1) with the working cylinder (1).

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