CN212337475U

CN212337475U - Piston assembly

Info

Publication number: CN212337475U
Application number: CN202021813326.3U
Authority: CN
Inventors: 陈世涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-01-12
Anticipated expiration: 2030-08-26

Abstract

The utility model provides a piston assembly, including piston and piston ring, the piston includes head and skirt portion, and the skirt portion is equipped with the piston pinhole, and the head is equipped with first annular, second annular, third annular from top to bottom in proper order, is equipped with the piston ring in first annular, second annular, the third annular, the inboard upper portion of first annular is equipped with first spacing lug, and the center of first spacing lug is 45 contained angles with the central line of circle rather than the place and the plane that piston pin hole axis is located, be equipped with second spacing lug on the inboard of second annular, second spacing lug sets up 180 with first spacing lug opposite direction, the opening part of piston ring is equipped with the slope of opposite direction; when the limiting device is used, the slope surface is abutted and matched with the limiting convex block. In the process of piston movement, the limiting convex block can always abut against a slope surface, so that the piston ring is prevented from shaking, the abrasion of the piston ring is reduced, the service life of the piston is prolonged, and the sealing performance is ensured.

Description

Piston assembly

Technical Field

The utility model relates to an engine piston technical field specifically is a piston assembly.

Background

At present, pistons commonly used in various countries in the world are generally provided with more than three piston ring grooves on the outer side of the upper part of the piston, and the same number of piston rings are installed on the piston. In order to increase the sealing performance, only the number of piston rings and the processing precision are increased; in order to prolong the service life of piston rings and cylinder sleeves, only the method for improving the surface wear resistance of materials is tried. However, the more piston rings, the larger friction surface, the higher resistance and the shorter the service life of the device.

SUMMERY OF THE UTILITY MODEL

The technical insufficiency to the existence, the utility model aims at providing a piston assembly.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a piston assembly, including piston and piston ring, the piston includes head and skirt portion, and the skirt portion is equipped with the piston pinhole, and the head is equipped with first annular, second annular, third annular from top to bottom in proper order, is equipped with the piston ring in first annular, second annular, the third annular, the inboard upper portion of first annular is equipped with first spacing lug, and the center of first spacing lug is 45 contained angles with the central line of circle rather than the place and the plane that piston pin hole axis is located, be equipped with second spacing lug on the inboard of second annular, second spacing lug sets up 180 with first spacing lug opposite direction, the opening part of piston ring is equipped with the slope of opposite direction; when the limiting device is used, the slope surface is abutted and matched with the limiting convex block.

Preferably, the inclined surface forms an angle of 60-80 ° with the vertical direction.

The beneficial effects of the utility model reside in that: in the process of piston movement, the limiting convex block can always abut against a slope surface, so that the piston ring is prevented from shaking, the abrasion of the piston ring is reduced, the service life of the piston is prolonged, and the sealing performance is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a piston assembly according to an embodiment of the present invention;

fig. 2 is a schematic view of the structure of a piston ring.

Description of reference numerals:

the piston comprises a piston 1, a piston ring 2, a piston ring 3, a head 4, a skirt 5, a piston pin hole 6, a first ring groove 7, a second ring groove 8, a third ring groove 9, a first limiting bump 10, a second limiting bump 10 and a slope surface 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 2, a piston assembly comprises a piston 1 and a piston ring 2, wherein the piston 1 comprises a head part 3 and a skirt part 4, the skirt part 4 is provided with a piston pin hole 5, the head part is sequentially provided with a first ring groove 6, a second ring groove 7 and a third ring groove 8 from top to bottom, the piston ring is arranged in the first ring groove 6, the second ring groove 7 and the third ring groove 8, the upper part of the inner side of the first ring groove 6 is provided with a first limit bump 9, the central connecting line of the center of the first limit bump 9 and the circle thereof and the plane of the axis of the piston pin hole 5 form an included angle of 45 degrees, the inner side of the second ring groove 7 is provided with a second limit bump 10, the second limit bump 10 and the first limit bump 9 are arranged in an opposite direction, and the opening of the piston ring is provided; in the process of piston movement, the first limiting convex block 9 and the second limiting convex block 10 can always abut against the slope surface 11, so that the piston ring 2 is prevented from shaking, and the abrasion of the piston ring 2 is reduced.

Preferably, the ramp surface 11 is angled from 60 to 80 from the vertical.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A piston assembly comprises a piston and a piston ring, wherein the piston comprises a head part and a skirt part, the skirt part is provided with a piston pin hole, the head part is sequentially provided with a first ring groove, a second ring groove and a third ring groove from top to bottom, and the first ring groove, the second ring groove and the third ring groove are internally provided with the piston ring; when the limiting device is used, the slope surface is abutted and matched with the limiting convex block.

2. A piston assembly according to claim 1, wherein said ramp surface is angled from 60 ° to 80 ° from vertical.