Bottom valve assembly for automobile shock absorber

Abstract

The utility model discloses a bottom valve assembly for an automobile shock absorber, and relates to the field of automobile shock absorbers, the bottom valve assembly comprises a bottom valve main body, a covering valve plate arranged on the upper portion of the bottom valve main body and other valve plates arranged on the lower portion of the bottom valve main body, and a valve line of the bottom valve main body is composed of a semicircle and an eccentric semicircle; the middle of the covering valve plate is composed of two semicircular structures, and the covering valve plate is matched with a valve line of the bottom valve body. According to the bottom valve, the valve line structure of the bottom valve is composed of the semicircle and the eccentric semicircle, an original structure in which the whole is intervened at the same time is changed into a structure capable of working in a distributed mode, and therefore it can be guaranteed that the valve plates cannot be opened or closed at the same time on the circumference but have a certain successive relation; and finally, the generated damping force is more linear, the noise risk is effectively reduced, and the comfort and safety of the vehicle are improved.

Description

Technical Field

[0001] The present application relates to the field of automobile shock absorbers, and in particular to a bottom valve assembly for automobile shock absorbers. Background Art

[0002] As key components of the automobile shock absorber system, the shock absorber piston and bottom valve are used to generate tensile and compressive damping forces during the movement of the entire system. During this period, the shock absorber oil flushes the valve plate through the channel inside the valve system, causing a pressure difference at both ends of the valve system, thereby generating damping force and increasing the comfort and safety of the vehicle.

[0003] Unnecessary sudden increase or decrease in damping force is detrimental to the comfort and safety of the vehicle. Usually, the compression damping force of the shock absorber during low-speed movement is generated by the cooperation between the bottom valve and the covering valve plate.

[0004] At present, when the shock absorber is compressed at low speed, the bottom valve plate is fully opened and integrated, which leads to an obvious critical value, thereby increasing the noise risk. Utility Model Content

[0005] In order to effectively reduce noise risks and improve vehicle comfort and safety, the present application provides a bottom valve assembly for an automobile shock absorber.

[0006] The present application provides a bottom valve assembly for an automobile shock absorber, which adopts the following technical solution:

[0007] A bottom valve assembly for an automobile shock absorber comprises a bottom valve body, a covering valve sheet arranged on the upper part of the bottom valve body and other valve sheets arranged on the lower part of the bottom valve body. The valve line of the bottom valve body consists of a semicircle and an eccentric semicircle, and the middle part of the covering valve sheet consists of two semicircular structures and is arranged in coordination with the valve line of the bottom valve body.

[0008] By adopting the above technical solution, the valve line structure of the bottom valve is composed of a semicircle and an eccentric semicircle, thereby changing the original overall simultaneous intervention structure into a distributed working structure, thereby ensuring that the valve plate will not be opened or closed at the same time on the circumference, but there is a certain sequence relationship, ultimately making the damping force it generates more linear, and effectively reducing the noise risk, thereby improving the comfort and safety of the vehicle.

[0009] Preferably, a positioning structure is provided on the bottom valve body, and the positioning structure is used to realize the positioning of the assembly angle during assembly;

[0010] The bottom valve assembly further comprises a bottom valve seat, on which a positioning portion cooperating with the positioning structure is arranged.

[0011] By adopting the above technical solution, the positioning structure and the positioning part cooperate with each other, so as to facilitate the positioning of the assembly angle during assembly.

[0012] Preferably, the positioning structure includes a protrusion arranged on one side of the bottom valve body, and the positioning portion is a recessed structure matched with the protrusion.

[0013] By adopting the above technical solution, the raised portion cooperates with the recessed structure to achieve positioning of the base.

[0014] Preferably, the protrusions are arranged in a step shape.

[0015] By adopting the above technical solution, the production of the bottom valve body and the bottom valve seat mold is facilitated.

[0016] Preferably, the positioning structure comprises a recessed portion provided on one side of the bottom valve body, and the positioning portion is a protruding structure cooperating with the recessed portion.

[0017] By adopting the above technical solution, the recessed portion cooperates with the raised structure to achieve positioning of the base.

[0018] Preferably, the recessed portion is opened in a step shape.

[0019] By adopting the above technical solution, the production of the bottom valve body and the bottom valve seat mold is facilitated.

[0020] Preferably, an annular groove is provided on the upper side of the bottom valve body, an oil drain hole is opened in the groove, an auxiliary oil hole and a fine-tuning oil hole are sequentially provided on one side of the oil drain hole, the diameter of the auxiliary oil hole is larger than the diameter of the fine-tuning oil hole, and the diameter of the auxiliary oil hole is smaller than the diameter of the oil drain hole.

[0021] By adopting the above technical solution, the auxiliary oil hole and the fine-tuning oil hole are used as auxiliary oil drain holes, so as to achieve the purpose of significantly improving the fluid flow stability and the fixing stability of the bottom valve seat body and the shock absorber.

[0022] Preferably, the bottom valve body is manufactured by powder metallurgy.

[0023] By adopting the above technical solution, the bottom valve body is manufactured by powder metallurgy. One-time molding reduces the production input of subsequent processing steps, effectively improves the molding strength of the valve line part, and further improves the stability of the shock absorber assembly force value.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The bottom valve line structure consists of a semicircle and an eccentric semicircle, and the original structure of simultaneous intervention is changed into a structure that can work in a distributed manner, so as to ensure that the valve plate will not be opened or closed at the same time on the circumference, but there is a certain sequence relationship, which ultimately makes the damping force generated more linear, effectively reduces the noise risk, and improves the comfort and safety of the vehicle;

[0026] 2. With the help of auxiliary oil holes and fine-tuning oil holes to assist the oil drain holes, the purpose of significantly improving the fluid flow stability and the fixing stability of the bottom valve seat body and the shock absorber is achieved;

[0027] 3. The powder metallurgy method is used to manufacture the bottom valve body. One-time molding reduces the production input of the later processing steps, effectively improves the molding strength of the valve line, and further improves the stability of the shock absorber assembly force value. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an axonometric diagram mainly showing the overall structure of the bottom valve assembly of this embodiment 1;

[0029] Figure 2 This is a schematic diagram mainly showing the valve line structure of the bottom valve of the present embodiment 1;

[0030] Figure 3 This is a schematic diagram of the main structure of the bottom valve of Embodiment 2;

[0031] Figure 4 This is a schematic diagram mainly showing the bottom valve seat structure of the present embodiment 2;

[0032] Figure 5 This is a schematic diagram mainly showing the bottom valve seat structure of the present embodiment 3.

[0033] Figure numerals: 1. bottom valve body; 11. positioning structure; 2. covering valve plate; 3. remaining valve plates; 4. rivet cap; 5. bottom valve seat; 51. positioning portion; 6. annular groove; 7. oil drain hole; 8. auxiliary oil hole; 9. fine-tuning oil hole. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with the accompanying drawings.

[0035] The embodiment of the present application discloses a bottom valve assembly for an automobile shock absorber.

[0036] Embodiment 1:

[0037] Reference Figure 1 and Figure 2The bottom valve assembly for automobile shock absorber includes a bottom valve body 1, a covering valve sheet 2 arranged on the upper part of the bottom valve body 1, and other valve sheets 3 arranged on the lower part of the bottom valve body 1. The covering valve sheet 2 and the other valve sheets 3 are fixed by rivet caps 4. The valve line of the bottom valve body 1 consists of a semicircle and an eccentric semicircle. The middle part of the covering valve sheet 2 consists of two semicircular structures and is matched with the valve line of the bottom valve body 1.

[0038] The valve line structure of the bottom valve in this embodiment is different from the traditional bottom valve structure. The valve line is not a perfect circle, but is composed of a semicircle and an eccentric semicircle. It is a structure that can work in steps rather than intervene as a whole at the same time. This structure can ensure the linear increase of the damping force and reduce the risk of noise. The pressure required to open or close the two semicircles covering the valve plate is different. The entire valve plate will not be opened or closed at the same time on the circumference, but there is a certain sequence relationship, which ultimately makes the damping force generated more linear and reduces the risk of noise.

[0039] Specifically, when the shock absorber is compressed, the pressure in the inner tube increases, and the shock absorber oil will flow downward into the outer tube through the channel on the bottom valve, and the damping force is generated at this moment. Depending on the speed of the connecting rod movement, the main functional area for generating the damping force is different. The damping force at low speed (0-0.13m / s) is mainly generated by the oil flowing through the channel in the area covered by the covering valve plate.

[0040] The implementation principle of a bottom valve assembly for an automobile shock absorber in an embodiment of the present application is as follows: the bottom valve line structure is composed of a semicircle and an eccentric semicircle, thereby changing the original structure that intervenes as a whole at the same time into a structure that can work in a distributed manner, thereby ensuring that the valve plate will not be opened or closed at the same time on the circumference, but there is a certain sequence relationship, thereby ultimately making the damping force generated more linear, and effectively reducing the noise risk, thereby improving the comfort and safety of the vehicle.

[0041] Embodiment 2:

[0042] Reference Figure 3 and Figure 4 The difference between this embodiment and the first embodiment is that a positioning structure 11 is provided on the bottom valve body, and the positioning structure 11 is used to realize the positioning of the assembly angle during assembly. The bottom valve assembly also includes a bottom valve seat 5, and the bottom valve seat 5 is provided with a positioning portion 51 that cooperates with the positioning structure 11. The positioning structure 11 and the positioning portion 51 cooperate with each other to facilitate the positioning of the assembly angle during assembly.

[0043] Specifically, the positioning structure 11 may include a protrusion disposed on one side of the bottom valve body 1, and the positioning portion 51 may be a recessed structure matched with the protrusion. The protrusion and the recessed structure cooperate to achieve positioning of the base.

[0044] Similarly, the positioning structure 11 may also include a recessed portion provided on one side of the bottom valve body 1, and the positioning portion 51 may be a protruding structure matched with the recessed portion. The recessed portion and the protruding structure cooperate to achieve positioning of the base.

[0045] It should be noted that the raised portion, the recessed portion and the positioning portion 51 are all arranged in a stepped structure, which is convenient for making the mold of the bottom valve body 1 and the bottom valve seat 5 .

[0046] Embodiment three:

[0047] Reference Figure 5 The difference between this embodiment and the first embodiment is that an annular groove 6 is provided on the upper side of the bottom valve body, an oil drain hole 7 is provided in the annular groove 6, an auxiliary oil hole 8 and a fine-tuning oil hole 9 are provided on one side of the oil drain hole 7 in sequence, the diameter of the auxiliary oil hole 8 is larger than the diameter of the fine-tuning oil hole 9, and the diameter of the auxiliary oil hole 8 is smaller than the diameter of the oil drain hole 7. The auxiliary oil hole 8 and the fine-tuning oil hole 9 are used to assist the oil drain hole 7, so as to significantly improve the fluid flow stability and the fixing stability of the bottom valve seat 5 and the shock absorber.

[0048] The implementation principle of a bottom valve assembly for an automobile shock absorber in an embodiment of the present application is as follows: by adopting a coordinated design of an oil drain hole, an auxiliary oil hole and a fine-tuning oil hole, the difficulty of controlling the opening and closing of the valve plate is reduced while significantly improving the fluid flow stability and the fixing stability of the bottom valve seat and the shock absorber, thereby effectively controlling the production and manufacturing cost of the bottom valve seat of the shock absorber and controlling the application cost.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bottom valve assembly for an automobile shock absorber, comprising a bottom valve body (1), a covering valve sheet (2) arranged on the upper part of the bottom valve body (1), and a remaining valve sheet (3) arranged on the lower part of the bottom valve body (1), wherein the covering valve sheet (2) and the remaining valve sheet (3) are fixed by a rivet cap (4), characterized in that: The valve line of the bottom valve body (1) is composed of a semicircle and an eccentric semicircle, and the middle part of the covering valve sheet (2) is composed of two semicircular structures and is arranged in coordination with the valve line of the bottom valve body (1).

2. A bottom valve assembly for an automobile shock absorber according to claim 1, characterized in that: The bottom valve body (1) is provided with a positioning structure (11), and the positioning structure (11) is used to achieve positioning of the assembly angle during assembly; The bottom valve assembly further comprises a bottom valve seat (5), and a positioning portion (51) cooperating with the positioning structure is provided on the bottom valve seat (5).

3. A bottom valve assembly for an automobile shock absorber according to claim 2, characterized in that: The positioning structure (11) comprises a protruding portion arranged on one side of the bottom valve body (1), and the positioning portion (51) is a recessed structure that cooperates with the protruding portion.

4. A bottom valve assembly for an automobile shock absorber according to claim 3, characterized in that: The protrusion is arranged in a step shape.

5. The bottom valve assembly for an automobile shock absorber according to claim 2, characterized in that: The positioning structure (11) comprises a recessed portion formed on one side of the bottom valve body (1), and the positioning portion (51) is a protruding structure that cooperates with the recessed portion.

6. A bottom valve assembly for an automobile shock absorber according to claim 5, characterized in that: The recessed portion is opened in a step shape.

7. A bottom valve assembly for an automobile shock absorber according to any one of claims 2 to 6, characterized in that: An annular groove (6) is arranged on the upper side of the bottom valve body (1), an oil drain hole (7) is opened in the annular groove (6), an auxiliary oil hole (8) and a fine-tuning oil hole (9) are arranged in sequence on one side of the oil drain hole (7), the diameter of the auxiliary oil hole (8) is larger than the diameter of the fine-tuning oil hole (9), and the diameter of the auxiliary oil hole (8) is smaller than the diameter of the oil drain hole (7).

8. A bottom valve assembly for an automobile shock absorber according to any one of claims 1 to 6, characterized in that: The bottom valve body (1) is manufactured by powder metallurgy.

Images