CN214304074U

CN214304074U - Piston ring and piston assembly

Info

Publication number: CN214304074U
Application number: CN202023049324.4U
Authority: CN
Inventors: 苏雷虹; 顾德
Original assignee: Chongqing Hailanxing Technology Co ltd
Current assignee: Chongqing Hailanxing Technology Co ltd
Priority date: 2020-11-07
Filing date: 2020-12-17
Publication date: 2021-09-28
Anticipated expiration: 2030-12-17
Also published as: CN113958709A; CN213655696U; CN213743713U; CN112459919A

Abstract

The utility model provides a piston ring and a piston assembly, wherein the piston ring is an annular structure formed by a plurality of split bodies in a surrounding way, a plurality of oil grooves which are arranged at intervals are arranged at the lower end parts of the split bodies, the oil grooves are radially arranged and extend from the inner walls of the split bodies to the outer walls of the split bodies; the piston assembly mainly comprises a piston, a piston ring and an elastic element, wherein a connecting rod mounting hole and a plurality of oil holes are formed in the piston, the piston ring is sleeved on the piston, one end of the elastic element abuts against the piston, the other end of the elastic element is fixed in the inner concave part of the piston ring, and the oil holes can be aligned to oil grooves. The utility model provides a piston ring and piston assembly simple structure, the processing degree of difficulty is little, and processing technology is simple, low in manufacturing cost, and stability is good, long service life.

Description

Piston ring and piston assembly

Technical Field

The utility model relates to a piston assembly, concretely relates to piston ring and piston assembly.

Background

The piston ring is a metal ring embedded in the piston groove and is divided into two types, namely a compression ring and an oil ring. The compression ring can be used for sealing the combustible mixed gas in the combustion chamber; the oil ring is used to scrape off the excessive oil on the cylinder. The piston ring is a metal elastic ring having a large outward expansion deformation, which is fitted into a ring groove having a cross section corresponding thereto. The reciprocating and rotating piston rings form a seal between the outer circumferential surface of the ring and the cylinder and one side of the ring and the ring groove by means of a pressure difference of gas or liquid.

In the prior art: document CN201461933U discloses a piston, in which a crown portion and a piston seat are separately made and connected by a connecting structure to form a complete piston, the crown portion includes a piston top and a piston ring belt, and a circular slider accommodating hole is arranged on the piston seat; document CN209011961U discloses a split engine piston, comprising: the piston comprises a piston cover, a piston body, a piston groove body, a piston ring, an oil ring groove, an oil ring, an axle hole, a screw, a combustion chamber, an oil hole, a positioning table, a clamp spring groove, a threaded hole and a screw hole, wherein the oil ring groove is arranged at the upper part of the side surface of the piston body, the oil ring is arranged in the oil ring groove, the oil hole is formed in the inner edge and the lower edge of the oil ring groove, and the oil hole is communicated with the inner side of the piston body; the piston body is provided with a shaft hole, a clamp spring groove is arranged in the shaft hole, and the piston body is provided with a positioning table which is cylindrical; the edge above the piston body is equipped with the screw hole, the piston lid is equipped with above the piston body, the piston lid upper surface is equipped with the combustion chamber, piston lid upper surface edge is equipped with the screw hole, the piston lid side is equipped with the piston groove body, the piston ring is equipped with in the piston groove body, piston lid lower surface is equipped with the locating hole, the locating hole is the cylinder hole, the piston lid passes through the locating hole and the location platform location transition fit above the piston body, the piston lid passes through the screw in the screw hole and couples together with the piston body. However, the piston rings in the above documents have a great difficulty in processing, and have technical problems that the piston rings are easily worn, have poor stability, are easily leaked gas, and have short service life in the using process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a piston ring that the processing degree of difficulty is little, stability is good.

In order to achieve the above purpose, the present invention adopts the following technical solution.

A piston ring, characterized in that: it is the annular structure that forms by a plurality of split bodies enclose, is provided with the oil groove of a plurality of interval arrangements under the split body, and the oil groove radially arranges, and the oil groove extends to split body outer wall from split body inner wall.

In order to improve the stability of the piston ring, the adjacent segments surrounding the piston ring are mutually inserted, lapped or buckled.

In order to further improve the stability of the piston ring, one end part of the same split body is provided with a first step, and the other end part of the same split body is provided with a second step; at the connecting part of the adjacent split bodies, the step I of one split body can be mutually overlapped with the step II of the other split body.

As the preferred scheme of the utility model, the step mesa of step one, the step mesa of step two all are the horizontal plane, and step mesa of step one, step two all are perpendicular with the axis of piston ring.

Further, an inner concave portion is arranged on the inner wall of the split body and used for accommodating one end portion of the elastic element. The flexibility of the piston ring can be improved by adopting the structure.

As the preferred scheme of the utility model, notch or blind hole are adopted to interior concave part.

As the utility model discloses a preferred embodiment, along split body circumference direction, the regional radius in split body outer wall upper portion is greater than the regional radius in split body outer wall lower part, and the upper portion region adopts domatic transition with the lower part region.

As the utility model discloses a preferred embodiment, along split circumferential direction, the regional radius in split outer wall upper portion, the regional radius in split outer wall lower part all are greater than the regional radius in split outer wall middle part, and the regional radius in split outer wall upper portion equals the regional radius in split outer wall lower part.

Based on aforementioned piston ring, another aim at provides a wearability and infiltration nature are excellent, and accuse oil performance is good, and stability is good, does not have wobbling piston assembly among the operation process.

As the utility model discloses a preferred embodiment, piston assembly mainly comprises piston, piston ring, elastic element, is provided with connecting rod mounting hole and a plurality of oilhole on the piston, and the piston ring cover is established on the piston, and elastic element one end is supported and is leaned on piston, the other end and fix in the indent portion of piston ring, and the oil groove can be aimed at to the oilhole.

As the utility model discloses a preferred embodiment, piston assembly mainly comprises piston, piston ring, is provided with connecting rod mounting hole and a plurality of oilhole on the piston, is provided with annular indent district at the piston outer wall, and the whole block of piston ring is behind annular indent district, and the convex part inner wall between the adjacent oil groove can just be to the oilhole.

Compare in current piston ring and subassembly thereof, the utility model provides a piston ring and piston subassembly have following beneficial effect:

(1) the structure is simple, the processing difficulty is small, the processing technology is simple, the manufacturing cost is low, the stability is good, and the service life is long;

(2) the split piston ring is adopted to replace a sealing ring, a check ring and an oil ring of the existing piston structure, the sealing ring, the oil ring and the check ring are integrated into an integrated structure, and compared with the sealing ring, the check ring and the oil ring, the split piston ring of the utility model is equivalent to an integrated piston ring, and the structure is more compact;

(3) so that the pressure of the piston ring on the inner wall of the cylinder body of the cylinder is uniform and controllable;

(4) no gas leakage exists in the axial direction in the operation process;

(5) the wear resistance and the wettability are excellent, the oil control performance is good, the flexibility is good, the stability is good, and no swing exists in the operation process;

(6) the piston body is light in weight, and the length of the piston body can be reduced as much as possible.

Drawings

Figure 1 is a schematic view of a single segment of a piston ring according to example 1;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the main direction of FIG. 1;

FIG. 4 is a side schematic view of FIG. 1;

FIG. 5 is a schematic top view of a piston ring (composed of four segments) according to example 1,

FIG. 6 is a schematic piston view of a piston ring assembly in embodiment 2;

FIG. 7 is a schematic sectional view of a piston ring assembly in accordance with embodiment 2;

FIG. 8 is a schematic radial cross-sectional view of a piston ring assembly in embodiment 2;

FIG. 9 is a schematic view of the elastic member of the piston ring assembly of embodiment 2;

figure 10 is a partial schematic view of a single segment of the piston ring of embodiment 3;

figure 11 is a schematic view of a single segment of the piston ring of embodiment 4;

FIG. 12 is a schematic sectional view of a piston ring assembly in accordance with embodiment 4;

figure 13 is a single segment schematic view of the piston ring of embodiment 5.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings and embodiments, which are only a part of the embodiments of the present invention, but not all of them. In the description of the present invention, it should be noted that the terms "inside, outside, up, down" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description and simplification of description.

Example 1

Please refer to fig. 1 to 5. The utility model provides a piston ring, it is by four split bodies 11 enclose the ring structure who closes and form, is provided with a plurality of interval arrangement's oil groove 12 under every split body 11, and oil groove 12 radially arranges, and oil groove 12 extends to split body 11 outer wall from split body 11 inner wall.

In this embodiment, the adjacent split bodies 11 of the ring are overlapped, specifically, a first step 14 is disposed at one end of the same split body 11, and a second step 15 is disposed at the other end, as shown in fig. 1, the first step 14 faces downward, and the second step 15 faces upward; at the connecting position of the adjacent split bodies 11, the first step 14 of one split body 11 is overlapped with the second step 15 of the other split body 11. The step surface of the first step 14 and the step surface of the second step 15 are horizontal planes, namely the step surface of the first step and the step surface of the second step are vertical to the axis of the piston ring.

In this embodiment, as shown in fig. 1 and 3, an inner concave portion 13 is provided on an inner wall of the segment 11, the inner concave portion 13 is used for accommodating one end portion of the elastic element 3, and the inner concave portion 13 is a blind hole.

In this embodiment, as shown in fig. 4, along the circumferential direction of the segment 11, the radius of the upper region 17 of the outer wall of the segment 11 is greater than the radius of the lower region 16 of the outer wall of the segment 11, the upper region 17 and the lower region 16 adopt a slope transition, and the top end and the bottom end of the upper region 17 are respectively provided with a chamfer. Essentially, this also means that the radius of the upper region of the piston ring is greater than the radius of the lower region of the piston ring.

Example 2

Please refer to fig. 6 to fig. 9. A piston assembly adopting the piston ring in the embodiment 1 mainly comprises a piston 2, the piston ring 1 and an elastic element 3, wherein the piston 2 is provided with a connecting rod mounting hole 19 and a plurality of oil holes 4, the piston ring 1 is sleeved on the piston 2, one end of the elastic element 3 abuts against the piston 2, the other end of the elastic element is fixed in an inner concave part 13 of the piston ring 1, and the oil holes 4 can be aligned to an oil groove 12. As shown in fig. 6, an annular concave area 21 is provided on the outer wall of the piston 2, and the piston ring 1 is integrally engaged with the annular concave area 21; as shown in fig. 9, the elastic element 3 is a spring, one end of which has a larger diameter than the other end thereof, so as to achieve the effect of clamping the spring in the inner recess 13 of the piston ring 1; in the assembled piston assembly, as shown in fig. 7 and 8, the inner wall of the segment 11 (piston ring 1) abuts against the wall of the annular recessed area 21 of the piston 2, and the outer wall of the upper region 17 of the segment 11 (piston ring 1) abuts against the inner wall of the cylinder block 18 of the cylinder. During use, the piston ring 1 is pressed against the inner wall of the cylinder 18 by the elastic force of the elastic element 3.

Example 3

A piston ring, please refer to embodiment 1 and refer to fig. 10, which is different from embodiment 1 in that: the adjacent segments 11 of the enclosed composite piston ring are clamped with each other, specifically, a plurality of rectangular grooves/labyrinth grooves are arranged at two end portions of the same segment 11, and at the connecting position of the two adjacent segments 11, the protrusion of one segment 11 (the tooth portion/protrusion of the enclosed composite rectangular groove/labyrinth groove) is clamped with the rectangular groove/labyrinth groove of the other segment 11.

Example 4

Please refer to fig. 11. The utility model provides a piston ring, it is by four split bodies 11 enclose the ring structure who closes and form, is provided with a plurality of interval arrangement's oil groove 12 under every split body 11, and oil groove 12 radially arranges, and oil groove 12 extends to split body 11 outer wall from split body 11 inner wall. In the embodiment, adjacent split bodies 11 of the encircling piston ring are overlapped, specifically, a first step 14 is arranged at one end of the same split body 11, and a second step 15 is arranged at the other end; at the connecting position of the adjacent split bodies 11, the first step 14 of one split body 11 is overlapped with the second step 15 of the other split body 11. The step surface of the first step 14 and the step surface of the second step 15 are horizontal planes, namely the step surface of the first step and the step surface of the second step are vertical to the axis of the piston ring. In this embodiment, please refer to fig. 4, along the circumferential direction of the segment 11, the radius of the upper region 17 of the outer wall of the segment 11 is greater than the radius of the lower region 16 of the outer wall of the segment 11, the upper region 17 and the lower region 16 adopt a slope transition, and the top end and the bottom end of the upper region 17 are respectively provided with a chamfer. Essentially, this also means that the radius of the upper region of the piston ring is greater than the radius of the lower region of the piston ring.

A piston assembly using the piston ring of the present embodiment is mainly composed of a piston 2 and a piston ring 1, as shown in FIG. 12, the piston 2 is provided with a connecting rod mounting hole 19 and a plurality of oil holes 4, the outer wall of the piston 2 is provided with an annular concave area 21, and after the piston ring 1 is integrally clamped in the annular concave area 21, the inner wall 20 of a convex part between adjacent oil grooves 12 can be opposite to the oil holes 4. During use, oil with proper pressure is horizontally sprayed from the oil hole 4 to the inner wall 20 of the convex part between the adjacent oil grooves 12, so that the split body 11 is driven to abut against the inner wall of the cylinder body 18, and the piston ring 1 is driven to abut against the inner wall of the cylinder body 18 through oil pressure.

Example 5

Please refer to fig. 13. The utility model provides a piston ring, it is by four split bodies 11 enclose the ring structure who closes and form, is provided with a plurality of interval arrangement's oil groove 12 under every split body 11, and oil groove 12 radially arranges, and oil groove 12 extends to split body 11 outer wall from split body 11 inner wall. In the embodiment, adjacent split bodies 11 of the encircling piston ring are overlapped, specifically, a first step 14 is arranged at one end of the same split body 11, and a second step 15 is arranged at the other end; at the connecting position of the adjacent split bodies 11, the first step 14 of one split body 11 is overlapped with the second step 15 of the other split body 11. The step surface of the first step 14 and the step surface of the second step 15 are horizontal planes, namely the step surface of the first step and the step surface of the second step are vertical to the axis of the piston ring. In the present embodiment, along the circumferential direction of the segment 11, the radius of the upper region 17 of the outer wall of the segment 11 and the radius of the lower region 16 of the outer wall of the segment 11 are both larger than the radius of the middle region 22 of the outer wall of the segment 11, and the radius of the upper region 17 of the outer wall of the segment 11 is equal to the radius of the lower region 16 of the outer wall of the segment 11, which is substantially to provide a ring groove in the middle region of the outer wall of the piston ring 1.

It should be noted that, in a specific application, the number of the segments 11 and the number of the elastic elements 3 respectively include, but are not limited to, four, and the specific size of each component is determined by calculation of those skilled in the art.

Claims

1. A piston ring, characterized in that: it is by a plurality of split bodies (11) enclose the ring structure who closes and form, is provided with a plurality of interval arrangement's oil groove (12) under split body (11), and oil groove (12) radially arrange, and oil groove (12) extend to split body (11) outer wall from split body (11) inner wall.

2. The piston ring as set forth in claim 1 wherein: the adjacent segments (11) of the enclosed piston ring are inserted, lapped or buckled with each other.

3. The piston ring as set forth in claim 2 wherein: one end of the same split body (11) is provided with a first step (14), and the other end is provided with a second step (15); at the connecting part of the adjacent split bodies (11), the first step (14) of one split body (11) can be mutually overlapped with the second step (15) of the other split body (11).

4. The piston ring as set forth in claim 3 wherein: the step surface of the first step (14) and the step surface of the second step (15) are horizontal surfaces.

5. The piston ring as set forth in any one of claims 1-4 wherein: an inner concave part (13) is arranged on the inner wall of the split body (11), and the inner concave part (13) is used for accommodating one end part of the elastic element (3).

6. The piston ring as set forth in claim 5 wherein: the concave part (13) adopts a gap or a blind hole.

7. The piston ring as set forth in claim 6 wherein: along the circumferential direction of the split body (11), the radius of the upper area (17) of the outer wall of the split body (11) is larger than that of the lower area (16) of the outer wall of the split body (11), and the upper area (17) and the lower area (16) adopt slope transition.

8. The piston ring as set forth in claim 6 wherein: along the circumferential direction of the split body (11), the radius of the upper area (17) of the outer wall of the split body (11) and the radius of the lower area (16) of the outer wall of the split body (11) are both larger than the radius of the middle area (22) of the outer wall of the split body (11), and the radius of the upper area (17) of the outer wall of the split body (11) is equal to the radius of the lower area (16) of the outer wall of the split body (11).

9. A piston assembly using the piston ring as claimed in any one of claims 1 to 8, wherein: piston assembly mainly comprises piston (2), piston ring (1), elastic element (3), is provided with connecting rod mounting hole (19) and a plurality of oilhole (4) on piston (2), and piston ring (1) cover is established on piston (2), and elastic element (3) one end is supported and is leaned on piston (2), the other end is fixed in interior concave part (13) of piston ring (1), and oil groove (12) can be aimed at in oilhole (4).

10. A piston assembly using the piston ring as claimed in any one of claims 1 to 8, wherein: the piston assembly mainly comprises a piston (2) and a piston ring (1), a connecting rod mounting hole (19) and a plurality of oil holes (4) are formed in the piston (2), an annular concave area (21) is formed in the outer wall of the piston (2), the piston ring (1) is integrally clamped in the annular concave area (21), and then the convex inner wall (20) between the adjacent oil grooves (12) can be opposite to the oil holes (4).