Piston for automobile shock absorber

Abstract

The utility model discloses a piston for an automobile shock absorber, which comprises a piston body, the piston body comprises a base part and a circular ring part, the circular ring part is sleeved outside the base part and is coaxially arranged with the base part, a plurality of connecting blocks which are distributed at intervals in the circumferential direction are arranged between the circular ring part and the base part, and an oil discharge channel is formed between every two adjacent connecting blocks. A plurality of annular grooves which are distributed at intervals in the axial direction of the circular ring part are formed in the outer wall of the circular ring part, and a plurality of annular tooth grooves which are distributed at intervals in the axial direction of the circular ring part are formed in the positions, located on the two sides of the axial direction of each annular groove, of the outer wall of the circular ring part. The inner side wall of the sealing ring is used for being embedded into the annular tooth groove. The sealing ring can be effectively prevented from generating axial displacement relative to the piston and even being separated from the piston, so that the sealing effect of the sealing ring on a gap between the piston and the working cylinder barrel can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile shock absorbers, in particular to a piston used for automobile shock absorbers. Background Art

[0002] The piston of an automobile shock absorber is an important component of the automobile shock absorber. When in use, the piston is installed inside a working cylinder barrel in the automobile shock absorber, and the piston is slidably connected to the working cylinder barrel. In addition, a sealing ring is wrapped on the outer wall of the piston, and the sealing ring is used to seal the gap between the piston and the working cylinder barrel. However, in the above structure, since the sealing ring is only wrapped on the outer wall of the piston by contraction force, when the piston slides relative to the working cylinder barrel, under the friction between the outer wall of the sealing ring and the inner wall of the working cylinder barrel, the sealing ring is prone to axial displacement relative to the piston or even detach from the piston, thereby affecting the sealing effect of the sealing ring on the gap between the piston and the working cylinder barrel. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a piston for an automobile shock absorber, which can effectively prevent the sealing ring from axially displacing relative to the piston or even separating from the piston, thereby ensuring the sealing effect of the sealing ring on the gap between the piston and the working cylinder.

[0004] The utility model discloses a piston for an automobile shock absorber, comprising a piston body, the piston body comprising a base and an annular portion, the annular portion being sleeved on the outside of the base and coaxially arranged with the base, a plurality of connecting blocks being circumferentially spaced and distributed between the annular portion and the base, an oil unloading channel being formed between each two adjacent connecting blocks, the base, the annular portion and the plurality of connecting blocks being integrally formed, a plurality of annular grooves being spaced and distributed along the axial direction of the annular portion being arranged on the outer wall of the annular portion, a plurality of annular tooth grooves being spaced and distributed along the axial direction of the annular portion being arranged on the outer wall of the annular portion on both sides of the axial direction of each annular groove, and when the outer wall of the annular portion is coated with rubber to form a sealing ring, the inner side wall of the sealing ring is used to be engaged with the annular tooth groove.

[0005] After adopting the above structure, the utility model can effectively prevent the sealing ring from axially displacing relative to the piston or even separating from the piston when the piston slides relative to the working cylinder barrel due to the embedding effect of the sealing ring and the plurality of annular tooth grooves, thereby ensuring the sealing effect of the sealing ring on the gap between the piston and the working cylinder barrel.

[0006] The utility model discloses a piston for an automobile shock absorber, wherein two inner side walls in the axial direction of each annular tooth groove are contracted from outside to inside along the radial direction of the circular ring portion to form a "V" shape; by adopting this structure, when rubber is coated on the outer wall of the circular ring portion, the fluid rubber can flow into the annular tooth groove more easily, and after the rubber is cured, the sealing ring formed by the cured rubber material can be better embedded in the annular tooth groove, thereby improving the embedding strength between the sealing ring and the circular ring portion, so as to avoid the situation where the sealing ring moves relative to the circular ring portion along the axial direction of the circular ring portion.

[0007] The utility model discloses a piston for a shock absorber of an automobile, wherein a plurality of embedding grooves spaced apart in the circumferential direction of the annular portion are arranged on the outer wall of the annular portion between each two adjacent annular tooth grooves on one side of each annular groove, and when the outer wall of the annular portion is coated with rubber to form a sealing ring, the inner wall of the sealing ring is used to be embedded in the embedding groove; by adopting this structure, when the outer wall of the annular portion is coated with rubber, the fluid rubber can flow into the embedding groove located on the outer wall of the annular portion, and after the rubber is cured, the sealing ring formed by the curing of the rubber material can be embedded in the embedding groove, thereby preventing the sealing ring from rotating in the circumferential direction relative to the annular portion, so as to improve the reliability of the sealing ring after being assembled with the annular portion.

[0008] The utility model discloses a piston for an automobile shock absorber, wherein chamfered surfaces are arranged on the inner walls on both sides of the outer end of each embedding groove; after the chamfered surfaces are arranged on the inner walls of the outer end of each embedding groove, sharp corners can be avoided at the outer end of the embedding groove, so that when the piston drives the sealing ring to move relative to the working cylinder barrel of the shock absorber, the outer end of the embedding groove can be prevented from cutting the sealing ring.

[0009] The utility model discloses a piston for an automobile shock absorber, wherein each oil unloading channel is provided with a "cross"-shaped reinforcing rib, and the outer end portion of each reinforcing rib is integrally connected to the inner side wall of the corresponding oil unloading channel; by providing the "cross"-shaped reinforcing rib in each oil unloading channel, the structural strength of the oil unloading channel can be improved, and the breakage of the piston located at the oil unloading channel can be avoided, that is, the structural strength and service life of the piston can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0011] Figure 1 It is a first three-dimensional structural schematic diagram of the utility model;

[0012] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0013] Figure 3 This is a second three-dimensional structural schematic diagram of the utility model;

[0014] Figure 4 for Figure 2 The schematic diagram of the structure after the enlargement of A in the middle;

[0015] Figure 5 for Figure 3 Schematic diagram of the enlarged structure at point B in the middle. DETAILED DESCRIPTION

[0016] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0017] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0018] like Figure 1-5 As shown, the piston for automobile shock absorber of the utility model comprises a piston body 1, the piston body 1 comprises a base 11 and an annular portion 12, the annular portion 12 is sleeved on the outside of the base 11 and is coaxially arranged with the base 11, a plurality of connecting blocks 13 spaced apart in the circumferential direction are arranged between the annular portion 12 and the base 11, an oil unloading channel 14 is formed between each two adjacent connecting blocks 13, the base 11, the annular portion 12 and the plurality of connecting blocks 13 are integrally formed, a plurality of annular grooves 15 spaced apart in the axial direction of the annular portion 12 are arranged on the outer wall of the annular portion 12, a plurality of annular tooth grooves 16 spaced apart in the axial direction of the annular portion 12 are arranged on the outer wall of the annular portion 12 on both sides of the axial direction of each annular groove 15, when the outer wall of the annular portion 12 is coated with rubber and a sealing ring is formed, the inner side wall of the sealing ring is used to be engaged with the annular tooth groove 16.

[0019] The two inner side walls in the axial direction of each annular tooth groove 16 shrink from the outside to the inside along the radial direction of the circular ring portion 12 to form a "V" shape; by adopting this structure, when the rubber is coated on the outer wall of the circular ring portion, the fluid rubber can flow into the annular tooth groove more easily, and after the rubber is cured, the sealing ring formed by the cured rubber material can be better embedded in the annular tooth groove, thereby improving the embedding strength of the sealing ring and the circular ring portion to avoid the sealing ring from moving relative to the circular ring portion along the axial direction of the circular ring portion.

[0020] A plurality of embedding grooves 17 are provided on the outer wall of the annular portion 12 between each adjacent two annular tooth grooves 16 on one side of each annular groove 15 and are spaced apart in the circumferential direction of the annular portion 12. When the outer wall of the annular portion 12 is coated with rubber to form a sealing ring, the inner wall of the sealing ring is used to be embedded in the embedding groove 17. By adopting this structure, when the outer wall of the annular portion is coated with rubber, the fluid rubber can flow into the embedding groove located on the outer wall of the annular portion, and after the rubber is cured, the sealing ring formed by the cured rubber material can be embedded in the embedding groove, thereby avoiding the circumferential rotation of the sealing ring relative to the annular portion, so as to improve the reliability of the sealing ring and the annular portion after assembly.

[0021] Chamfered surfaces 18 are provided on the inner walls on both sides of the outer end of each embedding groove 17; by providing chamfered surfaces on the inner walls of the outer end of each embedding groove, sharp corners can be avoided at the outer end of the embedding groove, so that when the piston drives the sealing ring to move relative to the working cylinder of the shock absorber, the outer end of the embedding groove can be prevented from cutting the sealing ring.

[0022] A "cross"-shaped reinforcing rib 19 is provided in each oil unloading channel 14, and the outer end portion of each reinforcing rib 19 is integrally connected to the inner wall of the corresponding oil unloading channel 14; by providing a "cross"-shaped reinforcing rib in each oil unloading channel, the structural strength of the oil unloading channel can be improved, and the breakage of the piston located at the oil unloading channel can be avoided, that is, the structural strength and service life of the piston can be improved.

[0023] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A piston for an automobile shock absorber, comprising a piston body (1), the piston body (1) comprising a base (11) and an annular portion (12), the annular portion (12) being sleeved outside the base (11) and coaxially arranged with the base (11), a plurality of connecting blocks (13) being arranged between the annular portion (12) and the base (11) and spaced apart in the circumferential direction, an oil discharge channel (14) being formed between each two adjacent connecting blocks (13), the base (11), the annular portion (12) and the plurality of connecting blocks (13) being integrally formed, a plurality of annular grooves (15) being spaced apart along the axial direction of the annular portion (12) being arranged on the outer wall of the annular portion (12), characterized in that: A plurality of annular tooth grooves (16) are provided on the outer wall of the annular portion (12) on both sides of each annular groove (15) in the axial direction and are spaced apart along the axial direction of the annular portion (12). When the outer wall of the annular portion (12) is coated with rubber to form a sealing ring, the inner side wall of the sealing ring is used to engage with the annular tooth grooves (16).

2. The piston for automobile shock absorber according to claim 1, characterized in that: The two inner side walls of each annular tooth groove (16) in the axial direction shrink from the outside to the inside along the radial direction of the annular portion (12) to form a "V" shape.

3. The piston for automobile shock absorber according to claim 1 or 2, characterized in that: A plurality of embedding grooves (17) are provided on the outer wall of the annular portion (12) between each two adjacent annular tooth grooves (16) on one side of each annular groove (15) and are spaced apart in the circumferential direction of the annular portion (12). When the outer wall of the annular portion (12) is coated with rubber to form a sealing ring, the inner side wall of the sealing ring is used to be embedded in the embedding grooves (17).

4. The piston for automobile shock absorber according to claim 3, characterized in that: Chamfered surfaces (18) are provided on the inner walls on both sides of the outer end of each embedding groove (17).

5. The piston for automobile shock absorber according to claim 1, characterized in that: A "cross"-shaped reinforcing rib (19) is provided in each of the oil unloading channels (14), and the outer end of each of the reinforcing ribs (19) is integrally connected to the inner side wall of the corresponding oil unloading channel (14).

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