CN2419421Y

CN2419421Y - Piston with double composite positioning constant-density piston ring

Info

Publication number: CN2419421Y
Application number: CN 00229912
Authority: CN
Inventors: 张小劳; 杜艳霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-12
Filing date: 2000-05-12
Publication date: 2001-02-14
Anticipated expiration: 2010-05-12

Abstract

A piston with dual-composite locating constant-density piston ring is composed of a piston with an air ring slot, an oil ring slot on said piston, a locating hole at bottom of air ring slot, an internal ring in said air ring slot, two external rings stacked up and down and installed to external circumference of internal ring, an internal locating claw in internal ring and installed in said locating hole, two slots on internal surface of upper and lower external rings and respectively fixed to upper and lower locating claws of internal ring, and a downward inclined hole at bottom of oil slot. The piston ring of the piston is more sealed with the cylinder wall, and has the advantages of efficiency and energy conservation.

Description

The piston that has the permanent close piston ring in two compound location

The utility model relates to piston and piston ring.

1～2 road oil ring and 2～3 road compression rings are generally arranged on the piston of known internal-combustion engine, because the piston ring number is many, increased friction loss, the piston ring of this piston also exists phenomenons such as dislocation, counterpart, thereby makes that cylinder operation pressure is inconsistent, causes rotary speed unstabilization, output power descends, fuel consumption is big, and the waste gas discharge capacity is also big, causes environmental pollution.Patent application 90225364.6 discloses a kind of MULTILAYER COMPOSITE piston ring for this reason, and this piston only has compression ring one, and it is formed by encircling in two outer shrouds of upper strata ring and one.The piston of this structure has reduced friction loss, has increased working life, but still can not avoid the jointing of piston ring to have dislocation and to lip reflex, so still can cause the unlikely possibility of cylinder operation pressure.

It is little that the purpose of this utility model then provides a kind of frictional resistance, piston ring can not occur the dislocation and to lip reflex, energy-conservation piston.

The utility model is achieved through the following technical solutions: this piston that has the permanent close piston ring in two compound location, comprise piston and piston ring, and piston is provided with compression one, and oil ring groove is arranged on the piston one; The compression bottom is equipped with positioning hole; Two outer shrouds that encircle in ring and upper and lower being contained in of being stacked together on the cylindrical are housed in the compression in one; The inwall of interior ring has position decided at the higher level but not officially announced pawl, out of line upper and lower two the outside fix pawls of own centre line on the outer wall of interior ring; In the interior positioning pawl of ring be contained in the positioning hole at the bottom of the compression; The opening inwall of upper and lower two outer shrouds all is processed with groove, on the upper and lower positioning pawl that encircles in its groove is installed on respectively; Oil groove is equipped with downward-sloping hole by the bottom.

In ring inboard, upper edge be provided with 45 ° chamfering, the angle on the interior ring between two of the outside fix pawl center lines is 180 °, the outer wall of upper and lower outer shroud is equipped with 45 ° of chamferings up and down.

In being equal to, the height of upper and lower outer shroud encircles 1/2 of height.

All less than 1/2 of interior ring height, the last plane of last positioning pawl and the upper-end surface of interior ring are on same plane for upper and lower positioning pawl height on the interior ring, and the lower plane of following positioning pawl and the lower end surface of interior ring are on same plane.

Have only an oil ring groove and a compression on this piston, loss reduces friction, and piston ring adopts two-way location, make the sealability of compression ring reach the optimum state, and piston ring only play extension effect, invariant position in compression, therefore solved the problem that causes ring change difficulty behind the abscission ring because of lack of water high temperature, having chamfering on the ring, that it can be obtained well is lubricated, thereby reaches piston ring and cylinder wall more seals, and has reached the purpose of Synergistic and energy-saving.

Be described further below in conjunction with drawings and Examples.

Fig. 1 is embodiment 1 a plan view;

Fig. 2 is the broken section enlarged view at I place among Fig. 1;

Fig. 3 is interior ring plan view;

Fig. 4 is interior ring plan view;

Fig. 5 is last outer shroud plan view;

Fig. 6 is the plan view of interior ring among the embodiment 2;

Fig. 7 is the plan view of interior ring among the embodiment 2.

Embodiment 1: compression 2 is arranged on piston 1 one, the compression bottom is equipped with positioning hole 2a, oil ring groove 6 together, 3 and two outer shrouds 4 of ring and 5 in one are housed in the compression ring 2, interior ring 3 is contained near the bottom land place, its inwall has position pawl 3a decided at the higher level but not officially announced, should in positioning pawl pack in the positioning hole 2a of compression 2 bottoms, in have on ring 3 the outer wall out of line on, following two outside fix pawl 3b and 3c, angle is 90 ° between the center line M ' N ' of the center line MN of interior positioning pawl and outside fix pawl, angle between the center line M ' N ' of last positioning pawl 3b on the outer wall and the center line M ' N ' of the following positioning pawl 3c on the outer wall is 180 °, and the height of last positioning pawl 3b and following positioning pawl 3c is less than 1/2 of interior ring height.The last plane of last positioning pawl 3b and the upper-end surface of interior ring 3 are on same horizontal plane, and the lower end surface of the lower plane of following positioning pawl 3c and interior ring 3 is on same horizontal plane.Outer shroud 4 and outer shroud 5 are stacked together up and down and are contained on the cylindrical of interior ring 3.The opening of outer shroud 4 has fluting 4a by upper inside wall, and this groove all becomes a trough with straight angle at every limit of opening inwall.The fluting 4a of outer shroud 4 is stuck on the positioning pawl 3b, and outer shroud 5 openings have the fluting 4b identical with groove 4a shape by lower inner wall, and the fluting 4b of outer shroud 5 is stuck in down on the positioning pawl 3c, identical 1/2 of the interior ring height that is equal to of the height of outer shroud 4 and outer shroud 5.

In ring 3 top have chamfering, the outer wall of outer shroud 4 and outer shroud 5 be equipped with chamfering up and down, oil ring 7 is housed in oil groove 6, the bottom of oil groove 6 is equipped with downward-sloping endoporus 8.

Embodiment 2: in the present embodiment, center line M ' N ' the angle at 45 of last positioning pawl 3b on the center line MN of interior pawl 3a on the interior ring 3 and the outer wall of interior ring 3, in the center line M ' N ' of last positioning pawl 3b on ring 3 the outer wall and the center line M of following positioning pawl 3c " N " become 90 ° of angles, all in the high centerline of interior ring 3, other structures are identical with embodiment 1 on the last plane of the bottom surface of last positioning pawl 3b and following positioning pawl 3c.

Claims

1, a kind of piston that has the permanent close piston ring in two compound location comprises piston and piston ring, and piston is provided with compression one, it is characterized in that: oil ring groove is arranged on the piston one; The compression bottom is equipped with positioning hole; Two outer shrouds that encircle in ring and upper and lower being contained in of being stacked together on the cylindrical are housed in the compression in one; In the inwall of ring have position decided at the higher level but not officially announced pawl, out of line upper and lower two the outside fix pawls of own centre line on the outer wall of interior ring: the interior positioning pawl of interior ring is contained in the positioning hole at the bottom of the compression; The opening inwall of upper and lower two outer shrouds all is processed with groove, on the upper and lower positioning pawl that encircles in its groove is installed on respectively; Oil groove is equipped with downward-sloping hole by the bottom.

2, the piston that has the permanent close piston ring in two compound location according to claim 1, it is characterized in that: inboard, interior ring upper edge is provided with 45 ° chamfering, the interior angle that encircles between two center lines going up the outside fix pawl is 180 °, and the outer wall of upper and lower outer shroud is equipped with 45 ° of chamferings up and down.

3, the piston that has the permanent close piston ring in two compound location according to claim 1 and 2 is characterized in that: encircle 1/2 of height in the height of upper and lower outer shroud is equal to.

4, the piston that has the permanent close piston ring in two compound location according to claim 3, it is characterized in that: the upper and lower positioning pawl height on the interior ring is all less than 1/2 of interior ring height, the last plane of last positioning pawl and the upper-end surface of interior ring are on same plane, and the lower plane of following positioning pawl and the lower end surface of interior ring are on same plane.