CN214888569U

CN214888569U - Powder metallurgy shock absorber piston ring

Info

Publication number: CN214888569U
Application number: CN202120943214.8U
Authority: CN
Inventors: 鲍新强
Original assignee: Ningbo Xinhong Precision Parts Co ltd
Current assignee: Ningbo Xinhong Precision Parts Co ltd
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2021-11-26
Anticipated expiration: 2031-05-06

Abstract

The utility model relates to a powder metallurgy technical field, in particular to powder metallurgy bumper shock absorber piston ring, including the piston body, piston body surface upper end parcel has first piston ring body, and first piston ring body inboard with the corresponding department meshing of piston body position have with the dentate slot of first piston ring inner wall adaptation, piston body surface lower extreme parcel has the second piston ring body, and second piston ring body inboard with the corresponding department fastening of piston body position inherently with the annular slot of second piston ring inner wall adaptation, annular slot surface middle-end radially is provided with the caulking groove, and the caulking groove embeds there is the third piston ring body, the third piston ring body overlaps the last piston ring body and the lower piston ring body of setting including folding from top to bottom. The utility model relates to a novelty, it is rational in infrastructure, structural strength is high and sealing performance is strong, and the result of use is better.

Description

Powder metallurgy shock absorber piston ring

Technical Field

The utility model relates to a powder metallurgy technical field, in particular to powder metallurgy shock absorber piston ring.

Background

The piston ring is one of the key parts of the automobile shock absorber piston assembly, the performance of the automobile shock absorber is directly influenced by the working characteristics of the piston ring, the main functions of the piston ring are sealing, heat conducting, lubricating oil evenly distributed and piston supporting, the piston ring reciprocates in a cylinder body along with the piston, the piston ring is one of the parts with the worst working conditions in the automobile shock absorber, the currently used piston ring is mostly in a plastic plane ring shape, the piston ring has a simple structure, low strength and easy abrasion, the sealing performance is poor, and the use requirement cannot be met.

Therefore, a powder metallurgy shock absorber piston ring is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a powder metallurgy shock absorber piston ring that intensity is high and sealing performance is good.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

A powder metallurgy bumper shock absorber piston ring, including the piston body, piston body surface upper end parcel has first piston ring body, and first piston ring body inboard with the corresponding department meshing of piston body position have with the dentate slot of first piston ring inner wall adaptation, piston body surface lower extreme parcel has the second piston ring body, and second piston ring body inboard with the corresponding department card of piston body position inherent with the annular slot of second piston ring inner wall adaptation, annular slot surface middle-end radially is provided with the caulking groove, and the caulking groove embeds there is the third piston ring body, the third piston ring body is including folding the last piston ring body and the lower piston ring body of taking the setting from top to bottom.

Furthermore, the number of the tooth-shaped grooves is at least five, the first piston ring body is sequentially provided with a steel base layer, a copper base layer and a polytetrafluoroethylene layer from inside to outside, the first piston ring body is of a full-wrapping type, one part of the first piston ring body is embedded into the tooth-shaped grooves, the rest part of the first piston ring body is uniformly higher than the tooth-shaped grooves, the upper end part of the first piston ring body is in a horn shape, and a circular gap is reserved between the inner side of the first piston ring body and the outer circular surface of the upper end of the piston body.

Furthermore, one end of the second piston ring body is wrapped on the outer side of one end of the first piston ring body, semilunar fixation rings are arranged on the inner side of the second piston ring body and correspond to the annular groove at equal intervals, and through holes convenient for the semilunar fixation rings to pass through are formed in the positions of the first piston ring body and the semilunar fixation rings corresponding to the semilunar fixation rings.

Furthermore, the second piston ring body is made of powder metallurgy materials, the opening structure of the second piston ring body is in an L shape which is mutually staggered, the third piston ring body is made of powder metallurgy materials, chamfers are arranged at the upper end and the lower end of the outer ring of the third piston ring body, and the inner ring of the third piston ring body is a conical surface.

Further, the height of the caulking groove is larger than that of the third piston ring body, and the third piston ring body moves up and down in the caulking groove.

Furthermore, the other parts of the first piston ring body except the trumpet-shaped end part and the second piston ring body are positioned on the same plane and keep a certain gap with the inner cavity of the working cylinder, and the trumpet-shaped end part of the first piston ring body and the third piston ring body are matched with the inner cavity of the working cylinder.

Further, an annular groove is formed in the bottom of the upper piston ring body, an upper opening is formed in one end of the upper piston ring body, a lower convex column is arranged at the other end of the upper piston ring body, the upper opening is symmetrical to the upper opening, an annular convex edge is arranged at the position, corresponding to the annular groove, of the lower piston ring body, the annular convex edge is located in the annular groove, and a lower opening and an upper convex column which are matched with the lower piston ring body are respectively arranged at the positions, corresponding to the upper opening, of the lower piston ring body and the lower convex column.

Further, nitride layers are arranged on the surfaces of the second piston ring body and the third piston ring body, and the hardness of the nitride layers reaches more than 950 HV.

The utility model discloses beneficial effect does: the utility model relates to a novelty, and is rational in infrastructure, first piston ring body is by the steel substrate, copper substrate and polytetrafluoroethylene layer are made, second piston ring body and third piston ring body are made by powder metallurgy material, structural strength is high, structural stability is strong, can be fit for the great high-speed section work of internal pressure ratio, excellent in use effect, adopt polytetrafluoroethylene piston ring and powder metallurgy piston ring after the improvement simultaneously, the two is complementary strong, consequently, the high low-speed section of work of shock absorber has been taken into account, simultaneously loudspeaker form port and the cooperation of conical third piston ring body on the first piston ring body, dual protection, sealed effect is with good.

Drawings

Fig. 1 is a schematic view of the main structure of a piston ring of the powder metallurgy shock absorber.

Fig. 2 is a schematic structural view of a piston body in a piston ring of a powder metallurgy shock absorber according to the present invention.

Fig. 3 is a schematic structural view of a second piston ring body in the piston ring of the powder metallurgy shock absorber.

Fig. 4 is a schematic structural view of a third piston ring body in the piston ring of the powder metallurgy shock absorber.

Fig. 5 is a schematic structural view of an upper piston ring body in the piston ring of the powder metallurgy shock absorber.

Fig. 6 is a schematic view of the structure of the lower piston ring in the piston ring of the powder metallurgy shock absorber.

In FIGS. 1-6: 1. a piston body; 2. a first piston ring body; 3. a tooth-shaped groove; 4. a second piston ring body; 5. an annular groove; 6. caulking grooves; 7. a third piston ring body; 71. an upper piston ring body; 711. an annular groove; 712. an upper opening; 713. a lower convex column; 72. a lower piston ring body; 721. an annular flange; 722. a lower opening; 723. and an upper convex column.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 6, the utility model discloses a powder metallurgy shock absorber piston ring, including

piston body

1, 1 surface upper end parcel of piston body has first piston ring body 2, and the inboard dentate slot 3 with 2 inner wall looks adaptations of first piston ring body of the meshing of the corresponding department in 1 position of first

piston ring body

2, 1 surface lower extreme parcel of piston body has second piston ring body 4, and the inboard annular slot 5 with 1 position looks adaptations of piston body of second piston ring body 4 that corresponds the department of chucking inherently with the second piston ring body 4, the surface middle-end of annular slot 5 radially is provided with caulking groove 6, and caulking groove 6 embeds there is third piston ring body 7, third piston ring body 7 is including the last piston ring body 71 and the lower piston ring body 72 of overlapping setting from top to bottom.

Wherein, the number of the tooth-shaped grooves 3 is at least five, the first piston ring body 2 is provided with a steel substrate, a copper substrate and a polytetrafluoroethylene layer from inside to outside in sequence, the first piston ring body 2 is of a full-wrapping type, one part of the first piston ring body 2 is embedded in the tooth-shaped grooves 3, the rest part is uniformly higher than the tooth-shaped grooves 3, the upper end part of the first piston ring body 2 is in a horn shape, a circular gap is reserved between the inner side of the first piston ring body and the outer circular surface of the upper end of the piston body 1, one end of the second piston ring body 4 is wrapped at the outer side of one end of the first piston ring body 2, half moon fixed rings are arranged at equal intervals at the positions corresponding to the positions of the annular grooves 5 at the inner side of the second piston ring body 4, through holes convenient for the half moon fixed rings to pass through are arranged at the positions corresponding to the positions of the first piston ring body 2 and the half moon fixed rings, the second piston ring body 4 is made of powder metallurgy materials, the opening structure of the second piston ring body 4 is in an L shape which is staggered mutually, the third piston ring body 7 is made of powder metallurgy materials, chamfers are arranged at the upper end and the lower end of the outer ring of the third piston ring body 7, the inner ring of the third piston ring body 7 is a conical surface, the height of the caulking groove 6 is greater than that of the third piston ring body 7, the third piston ring body 7 moves up and down in the caulking groove 6, the other parts of the first piston ring body 2 except the trumpet-shaped end and the second piston ring body 4 are positioned on the same plane and keep a certain gap with the inner cavity of the working cylinder, the trumpet-shaped end of the first piston ring body 2 and the third piston ring body 7 are matched with the inner cavity of the working cylinder, an annular groove 711 is arranged at the bottom of the upper piston ring body 71, an upper opening 712 is arranged at one end of the upper piston ring body 71, a lower convex column 713 is arranged at the other end and is symmetrical to the upper opening 712, an annular convex edge 711 is arranged at the position of the lower piston ring body 72 corresponding to the annular groove 721, and the annular convex edge is positioned in the annular groove 711, the lower piston ring body 72 is provided with a lower opening 722 and an upper stud 723 which are matched with the lower stud 713 and the upper opening 712 at positions corresponding to the positions of the lower stud 713 and the upper opening 712 respectively, and the surfaces of the second piston ring body 4 and the third piston ring body 7 are provided with nitride layers, wherein the hardness of the nitride layers reaches more than 950 HV.

The working principle is as follows: when the device is used, the first piston ring body 2 is firstly arranged on the piston body 1, then the second piston ring body 4 is arranged on the piston body 1, one end of the second piston ring body is coated with a part of the first piston ring body 2, then the upper piston ring body 71 and the lower piston ring 72 are placed in the caulking groove 6 and overlapped, and then the whole piston body 1 is arranged in the inner cavity of the working cylinder.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. A powder metallurgy shock absorber piston ring, includes piston body (1), its characterized in that: the piston body (1) surface upper end parcel has first piston ring body (2), and first piston ring body (2) inboard with piston body (1) position corresponding department meshing have with dentate slot (3) of first piston ring body (2) inner wall looks adaptation, piston body (1) surface lower extreme parcel has second piston ring body (4), and second piston ring body (4) inboard with piston body (1) position corresponding department clamping inherent with annular slot (5) of second piston ring body (4) inner wall looks adaptation, annular slot (5) surface middle-end radially is provided with caulking groove (6), and caulking groove (6) built-in have third piston ring body (7), third piston ring body (7) are including last piston ring body (71) and the piston ring body (72) down of overlapping the setting from top to bottom.

2. A powder metallurgy shock absorber piston ring according to claim 1, wherein: the number of the tooth-shaped grooves (3) is at least five, the first piston ring body (2) is sequentially provided with a steel base layer, a copper base layer and a polytetrafluoroethylene layer from inside to outside, the first piston ring body (2) is of a full-wrapping type, one part of the first piston ring body (2) is embedded into the tooth-shaped grooves (3), the rest part of the first piston ring body is uniformly higher than the tooth-shaped grooves (3), the upper end part of the first piston ring body (2) is in a horn shape, and a circular gap is reserved between the inner side of the first piston ring body and the outer circular surface of the upper end of the piston body (1).

3. The powder metallurgy shock absorber piston ring according to claim 1, wherein: one end of the second piston ring body (4) is wrapped at the outer side of one end of the first piston ring body (2), semilunar solid rings are arranged at equal intervals at the positions, corresponding to the positions of the annular grooves (5), of the inner side of the second piston ring body (4), and through holes convenient for the semilunar solid rings to penetrate are formed in the positions, corresponding to the positions of the semilunar solid rings, of the first piston ring body (2).

4. A powder metallurgy shock absorber piston ring according to claim 1, wherein: the piston is characterized in that the second piston ring body (4) is made of powder metallurgy materials, the opening structure of the second piston ring body (4) is in an L shape which is staggered with each other, the third piston ring body (7) is made of powder metallurgy materials, chamfers are arranged at the upper end and the lower end of the outer ring of the third piston ring body (7), and the inner ring of the third piston ring body (7) is a conical surface.

5. A powder metallurgy shock absorber piston ring according to claim 1, wherein: the height of the caulking groove (6) is larger than that of the third piston ring body (7), and the third piston ring body (7) moves up and down in the caulking groove (6).

6. A powder metallurgy shock absorber piston ring according to claim 1, wherein: the other parts of the first piston ring body (2) except the trumpet-shaped end part and the second piston ring body (4) are positioned on the same plane and keep a certain gap with the inner cavity of the working cylinder, and the trumpet-shaped end part of the first piston ring body (2) and the third piston ring body (7) are matched with the inner cavity of the working cylinder.

7. A powder metallurgy shock absorber piston ring according to claim 1, wherein: the piston ring is characterized in that an annular groove (711) is formed in the bottom of the upper piston ring body (71), an upper opening (712) is formed in one end of the upper piston ring body (71), a lower convex column (713) is arranged at the other end of the upper piston ring body (71) and is symmetrically arranged with the upper opening (712), an annular convex edge (721) is arranged at the position, corresponding to the annular groove (711), of the lower piston ring body (72), the annular convex edge (721) is located in the annular groove (711), and a lower opening (722) and an upper convex column (723) which are matched with the lower piston ring body are respectively arranged at the positions, corresponding to the lower convex column (713) and the upper opening (712).

8. A powder metallurgy shock absorber piston ring according to claim 1, wherein: and nitriding layers are arranged on the surfaces of the second piston ring body (4) and the third piston ring body (7), and the hardness of the nitriding layers reaches more than 950 HV.