Valve seat of automobile shock absorber

Abstract

The utility model provides an automobile shock absorber valve seat which comprises a valve seat body, and a plurality of oil through holes distributed at intervals in the circumferential direction are formed in the valve seat body. The automobile shock absorber valve seat further comprises a first sealing ring, an annular groove is formed in the position, located on the outer sides of the multiple oil through holes, of the upper end of the valve seat body, and annular reverse buckling grooves are formed in the positions, located on the two sides of the radial direction of the annular groove, of the lower end of the annular groove. The lower end of the first sealing ring is provided with an annular reverse buckling part, the reverse buckling part is inserted into the annular groove and buckled with the annular reverse buckling groove, and the upper end of the first sealing ring protrudes out of the annular groove and is used for being tightly attached to the valve plate in a sealed mode. By the adoption of the structure, when the valve plate needs to block the oil through hole in the valve seat body, the outer edge of the valve plate can abut against the upper end face of the first sealing ring, and therefore the reliability of sealing between the valve plate and the valve seat body can be improved, and the oil through hole blocking effect of the valve plate can be improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive shock absorber technology, and more specifically, to an automotive shock absorber valve seat. Background Technology

[0002] The valve seat of an automotive shock absorber is a crucial component. During use, the upper end of the valve seat is inserted into the lower end of the working cylinder within the shock absorber, and the valve seat is fixed to the working cylinder. Currently, automotive shock absorber valve seats on the market consist of a valve seat body with several circumferentially spaced oil passages. When the valve seat body is in use, a valve plate is installed in the middle of the upper end of the valve seat body to block the oil passages. When the valve plate is open, oil can flow through the oil passages; when the valve plate is attached to the upper end of the valve seat body and blocks the oil passages, it prevents oil from flowing through. However, in existing structures, because the valve plate only adheres to the upper end of the valve seat body when blocking the oil passages, there is a drawback in the reliability of the seal between the valve plate and the valve seat body, which affects the sealing effect of the valve plate on the oil passages. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a valve seat for an automotive shock absorber, which can improve the reliability of the seal between the valve plate and the valve seat body, that is, improve the sealing effect of the valve plate on the oil passage.

[0004] This utility model provides a valve seat for an automotive shock absorber, including a valve seat body with a plurality of oil passage holes arranged circumferentially at intervals. The valve seat also includes a first sealing ring. An annular groove is provided at the upper end of the valve seat body located outside the plurality of oil passage holes. An annular undercut groove is provided at the lower end of the annular groove and on both sides of the annular groove in the radial direction. An annular undercut part is provided at the lower end of the first sealing ring. The undercut part is inserted into the annular groove and engages with the annular undercut groove. The upper end of the first sealing ring protrudes from the annular groove and is used to tightly seal against the valve plate.

[0005] By adopting the above structure, when the valve plate needs to block the oil passage hole on the valve seat body, the outer edge of the valve plate can abut against the upper end face of the first sealing ring, thereby improving the reliability of the seal between the valve plate and the valve seat body, that is, improving the sealing effect of the valve plate on the oil passage hole; in addition, since the lower end of the first sealing ring is inserted into the annular groove, and the first sealing ring is fastened to the annular undercut groove through the undercut part, it has the advantage of reliable connection between the first sealing ring and the valve seat body.

[0006] In one possible implementation, the lower end of the undercut portion forms an inverted conical portion, which is used to guide and engage with the inner wall of the annular groove to facilitate insertion of the undercut portion into the annular groove and engagement with the annular undercut groove. With this structure, under the action of the inverted conical portion, during the process of insertion and engagement of the undercut portion with the annular groove and engagement with the annular undercut groove, the inverted conical portion can guide and engage with the inner wall of the annular groove to facilitate insertion of the undercut portion into the annular groove and engagement with the annular undercut groove. That is, it can facilitate the process of inserting the undercut portion into the annular groove and the process of engaging the undercut portion with the annular undercut groove.

[0007] In one possible implementation, the upper end face of the first sealing ring forms a ring-shaped dome surface; by adopting this structure, under the action of the ring-shaped dome surface, when the upper end of the first sealing ring abuts against the valve plate, the upper end of the first sealing ring can reliably seal against the lower end face of the valve plate.

[0008] In one possible implementation, the automotive shock absorber valve seat further includes a second sealing ring. An annular step is provided on the outer wall of the upper end of the valve seat body. The second sealing ring is supported on the annular step, and its inner circumferential wall is in close contact with the side wall of the annular step. Several annular ribs are provided on the upper surface of the second sealing ring, spaced apart from the inside to the outside along the radial direction of the second sealing ring. The upper end of the second sealing ring and the annular ribs are used to abut against and tightly seal against the lower end of the working cylinder. With this structure, under the action of the second sealing ring, after the upper end of the valve seat body is engaged with the working cylinder, the second sealing ring can seal the gap between the valve seat body and the working cylinder. Furthermore, under the action of the several annular ribs, when the second sealing ring abuts against the end of the working cylinder, all the annular ribs can deform and tightly seal against the end of the working cylinder, thereby improving the sealing effect of the second sealing ring on the gap between the valve seat body and the working cylinder.

[0009] In one possible implementation, an annular rounded corner surface is provided at the outer edge of the upper end of the valve seat body. The annular rounded corner surface is used to guide and cooperate with the inner wall of the working cylinder to facilitate the insertion of the upper end of the valve seat body into the working cylinder. With this structure, when the valve seat body and the working cylinder are assembled at their ends, the annular rounded corner surface can cooperate and guide with the inner wall of the working cylinder to facilitate the insertion of the upper end of the valve seat body into the working cylinder, which facilitates the assembly of the valve seat body and the working cylinder. In addition, during the process of assembling the second sealing ring onto the annular step, the annular rounded corner surface can cooperate and guide with the inner circumferential wall of the second sealing ring to facilitate the assembly of the second sealing ring onto the annular step. Attached Figure Description

[0010] Figure 1 A cross-sectional view of the first and second sealing rings after assembly with the valve seat body;

[0011] Figure 2 for Figure 1 A magnified structural diagram of point A in the middle;

[0012] Figure 3 for Figure 1 A magnified structural diagram of point B in the middle;

[0013] Figure 4 This is a three-dimensional structural diagram of the valve seat body. Detailed Implementation

[0014] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0015] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0016] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0017] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] See Figure 1-4As shown in the figure, this application discloses an automotive shock absorber valve seat, including a valve seat body 1, on which a plurality of oil passage holes 11 are provided in a circumferentially spaced manner; the automotive shock absorber valve seat also includes a first sealing ring 2, and an annular groove 12 is provided at the upper end of the valve seat body 1 located outside the plurality of oil passage holes 11, and an annular undercut groove 13 is provided at the lower end of the annular groove 12 and on both sides of the annular groove 12 in the radial direction; the lower end of the first sealing ring 2 is provided with an annular undercut part 21, which is inserted into the annular groove 12 and engages with the annular undercut groove 13, and the upper end of the first sealing ring 2 protrudes from the annular groove 12 and is used to tightly seal with the valve plate; in the above structure, after the undercut part is inserted into the annular groove and engages with the annular undercut groove, the lower end of the first sealing ring can tightly seal with the valve seat body in a circumferential manner.

[0019] The lower end of the undercut 21 forms an inverted conical part 211. The inverted conical part 211 is used to guide and cooperate with the inner wall of the annular groove 12 so that the undercut 21 can be inserted into the annular groove 12 and engaged with the annular undercut groove 13. With this structure, under the action of the inverted conical part, during the process of the undercut part engaging with the annular groove and engaging with the annular undercut groove, the inverted conical part can guide and cooperate with the inner wall of the annular groove so that the undercut part can be inserted into the annular groove and engaged with the annular undercut groove. That is, it can facilitate the process of the undercut part being inserted into the annular groove and the process of the undercut part engaging with the annular undercut groove.

[0020] The upper end face of the first sealing ring 2 forms a ring-shaped dome surface 22. With this structure, under the action of the ring-shaped dome surface, when the upper end of the first sealing ring abuts against the valve plate, the upper end of the first sealing ring can reliably seal against the lower end face of the valve plate.

[0021] The automotive shock absorber valve seat also includes a second sealing ring 3. An annular step 14 is provided on the outer wall of the upper end of the valve seat body 1. The second sealing ring 3 is supported on the annular step 14, and the inner circumferential wall of the second sealing ring 3 is in close contact with the side wall of the annular step 14. Several annular ribs 31 are provided on the upper end surface of the second sealing ring 3, which are distributed from the inside to the outside along the radial direction of the second sealing ring 3. The upper end of the second sealing ring 3 and the annular ribs 31 are used to abut against and tightly seal against the lower end of the working cylinder. With this structure, under the action of the second sealing ring, after the upper end of the valve seat body is engaged with the working cylinder, the second sealing ring can seal the gap between the valve seat body and the working cylinder. In addition, under the action of the several annular ribs, when the second sealing ring abuts against the end of the working cylinder, the several annular ribs can deform and tightly seal against the end of the working cylinder, thereby improving the sealing effect of the second sealing ring on the gap between the valve seat body and the working cylinder.

[0022] An annular rounded corner surface 15 is provided at the outer edge of the upper end of the valve seat body 1. The annular rounded corner surface 15 is used to cooperate with the inner wall of the working cylinder to guide the upper end of the valve seat body 1 into the working cylinder. With this structure, when the valve seat body and the working cylinder are assembled at their ends, the annular rounded corner surface can cooperate with the inner wall of the working cylinder to guide the upper end of the valve seat body into the working cylinder, which facilitates the assembly of the valve seat body and the working cylinder. In addition, during the process of assembling the second sealing ring onto the annular step, the annular rounded corner surface can cooperate with the inner circumferential wall of the second sealing ring to guide the second sealing ring onto the annular step.

[0023] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A valve seat for an automotive shock absorber, comprising a valve seat body (1), wherein the valve seat body (1) is provided with a plurality of oil passage holes (11) arranged circumferentially at intervals; characterized in that: The automotive shock absorber valve seat also includes a first sealing ring (2). An annular groove (12) is provided at the upper end of the valve seat body (1) located outside the several oil passages (11). An annular undercut groove (13) is provided at the lower end of the annular groove (12) and on both sides of the annular groove (12) in the radial direction. An annular undercut part (21) is provided at the lower end of the first sealing ring (2). The undercut part (21) is inserted into the annular groove (12) and engages with the annular undercut groove (13). The upper end of the first sealing ring (2) protrudes from the annular groove (12) and is used to seal tightly with the valve plate.

2. The automotive shock absorber valve seat according to claim 1, characterized in that: The lower end of the undercut part (21) forms an inverted cone-shaped part (211), which is used to cooperate with the inner wall of the annular groove (12) for guidance so that the undercut part (21) can be inserted into the annular groove (12) and engaged with the annular undercut groove (13).

3. The automotive shock absorber valve seat according to claim 1 or 2, characterized in that: The upper end face of the first sealing ring (2) forms a ring-shaped dome surface (22).

4. The automotive shock absorber valve seat according to claim 1, characterized in that: The automotive shock absorber valve seat also includes a second sealing ring (3). An annular step (14) is provided on the outer wall of the upper end of the valve seat body (1). The second sealing ring (3) is supported on the annular step (14). The inner circumferential wall of the second sealing ring (3) is in close contact with the side wall of the annular step (14). Several annular ribs (31) are provided on the upper end surface of the second sealing ring (3) and are distributed from the inside to the outside along the radial direction of the second sealing ring (3). The upper end of the second sealing ring (3) and the annular ribs (31) are used to abut against and seal tightly with the lower end of the working cylinder.

5. The automotive shock absorber valve seat according to claim 4, characterized in that: An annular rounded corner surface (15) is provided at the outer edge of the upper end of the valve seat body (1). The annular rounded corner surface (15) is used to cooperate with the inner wall of the working cylinder for guidance so that the upper end of the valve seat body (1) can be inserted into the working cylinder.

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