CN2557708Y

CN2557708Y - Assembling piston ring

Info

Publication number: CN2557708Y
Application number: CN 02278503
Authority: CN
Inventors: 任兰敏; 鞠抗利
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-24
Filing date: 2002-07-24
Publication date: 2003-06-25
Anticipated expiration: 2012-07-24

Abstract

Disclosed is a combined piston ring which comprises an upper reverse torsion ring(1) and a lower torsion ring(2) which are piled up with the openings staggered at an angle of 180 degree. The section of the upper reverse torsion ring(1) is a trapezia structure with the inner edge parallel to the outer edge and the inner edge longer than the outer edge; the section of the lower torsion ring(2) is a trapezia structure with the inner edge parallel to the outer edge and the inner edge shorter than the outer edge; a circular gap(3) is arranged at the inner side of the section; the upper plane of the upper ring is parallel to the lower plane of the lower ring; the section of the piled up upper reverse torsion ring and the lower torsion ring(2) resembles a rectangle. The tortility of the lower torsion ring(2) is increased due to the structure, so the contact area of the external ring work surface of the piston ring with the cylinder wall is reduced, thus friction between the piston ring and the cylinder is reduced, the scraping and lubricating ability is increased, which is good for initial joining, reducing oil consumption and exhaust pollution.

Description

Multiple-piece piston-ring

(1) technical field

The utility model relates to a kind of piston ring, relates to a kind of internal-combustion engine multiple-piece piston-ring specifically.

(2) background technique

The utility model is the continuation of the patent No. 98217068.8 model utilitys.Though the patent No. is the disclosed multiple-piece piston-ring of 98217068.8 model utilitys when having solved in the prior art existing complex structure, installation fee preferably, cost is higher, promote the bigger deficiency of difficulty, also exist because of its desirable not to the utmost, lubricating oil consumption improvements of still needing bigger than normal of torsion downward frizing effect that causes less than normal of positive twist type ring down.

(3) summary of the invention

The purpose of this utility model is set about from the torsion of strengthening following positive twist type ring, and the multiple-piece piston-ring that a kind of downward frizing is effective, lubricating oil consumption is low is provided just at above-mentioned existing in prior technology deficiency.

The purpose of this utility model can realize by following measure:

Multiple-piece piston-ring of the present utility model comprises last reverse torsion ring and the following positive twist type ring that is stacked together, and upper and lower two rings are stacked together in interlace 180 ° mode of its opening, described cross section of going up reverse torsion ring is that inside and outside both sides are parallel, and edge lengths is greater than the trapezium structure of outer edge lengths in it; The described cross section of positive twist type ring down is that inside and outside both sides are parallel, and its interior edge lengths is less than the trapezium structure of outer edge lengths, and the inboard is processed with annular breach thereon, its objective is to make the following positive twist type ring described in the utility model obtain bigger twist angle; Described last plane of going up ring is parallel to each other with the lower plane that encircles down, and upper and lower twist type ring stacks the approximate rectangular structure in cross section that the combination back forms.

Annular breach described in the utility model can be the subtriangular annular chamfer in a cross section; It also can be the approximate rectangular annular incision in cross section; The annular that can also be the approximate arcuate structure in cross section is cut platform.

Good effect of the present utility model is as follows:

Due to the structure characteristic of following positive twist type ring in the utility model, can make it obtain bigger twist angle, thereby make the long-pending minimizing of piston ring excircle working surface and cylinder wall contact surface, and then also just reduced friction power loss between them, strengthened the ability of downward wiper lubricant oil, and help motor the initial stage break-in, reduce engine consumption (fuel oil, machine oil), reduce the discharge amount of exhaust pollutant.

(4) description of drawings

Fig. 1 is the cut-away view of first kind of embodiment of the utility model.

Fig. 2 is the cut-away view of second kind of embodiment of the utility model.

Fig. 3 is the cut-away view of the third embodiment of the utility model.

(5) embodiment

The utility model is done with detailed description below with reference to embodiment's (accompanying drawing), but does not limit the utility model.

As shown in the figure, multiple-piece piston-ring of the present utility model comprises last reverse torsion ring 1 and the following positive twist type ring 2 that is stacked together, and upper and lower two rings are stacked together in interlace 180 ° mode of its opening, described cross section of going up reverse torsion ring 1 is that inside and outside both sides are parallel, and edge lengths is greater than the trapezium structure of outer edge lengths in it; The described cross section of positive twist type ring 2 down is that inside and outside both sides are parallel, and its interior edge lengths is less than the trapezium structure of outer edge lengths, and the inboard is processed with annular breach 3 thereon, its objective is to make the following positive twist type ring described in the utility model obtain bigger twist angle; Described last plane of going up ring is parallel to each other with the lower plane that encircles down, and upper and lower twist type ring stacks the approximate rectangular structure in cross section that the combination back forms; Annular breach 3 described in the utility model can be the subtriangular annular chamfer in a cross section (as shown in Figure 1); It also can be approximate rectangular annular incision in cross section (as shown in Figure 2); The annular that can also be the approximate arcuate structure in cross section is cut platform (as shown in Figure 3).

Claims

1, a kind of multiple-piece piston-ring, it comprises the last reverse torsion ring (1) that is stacked together and positive twist type ring (2) down, and upper and lower two rings are stacked together in interlace 180 ° mode of its opening, it is characterized in that:

A, described cross section of going up reverse torsion ring (1) are that inside and outside both sides are parallel, and edge lengths is greater than the trapezium structure of outer edge lengths in it;

B, the described cross section of positive twist type ring (2) down are that inside and outside both sides are parallel, and its interior edge lengths is less than the trapezium structure of outer edge lengths, and the inboard is processed with annular breach (3) thereon;

C, described last plane of going up ring are parallel to each other with the lower plane that encircles down, and upper and lower twist type ring stacks the approximate rectangular structure in cross section that the combination back forms.

2, according to asking profit to require 1 described multiple-piece piston-ring, it is characterized in that: the described last inboard of positive twist type ring (2) down is processed with annular chamfer.

3, according to asking profit to require 1 described multiple-piece piston-ring, it is characterized in that: the described last inboard of positive twist type ring (2) down is processed with annular incision.

4, according to asking profit to require 1 described multiple-piece piston-ring, it is characterized in that: the described last inboard of positive twist type ring (2) down is processed with annular and cuts platform.