Sealing piston

Abstract

The utility model provides a sealing piston, and belongs to the field of pistons. The piston solves the problems that sealing is achieved only through a single sealing ring in a common piston, the sealing effect of the common piston is poor, and leakage is prone to occurring once the common piston meets the situation that oil pressure loads are large, and comprises a cylinder body, a piston rod and a piston body located on the piston rod. A plurality of first mounting grooves and a second mounting groove are formed in the piston body, first inner sealing rings are arranged in the mounting grooves, first outer sealing rings abutting against the first inner sealing rings are arranged on the outer sides of the first inner sealing rings, third mounting grooves are formed in the first outer sealing rings, and auxiliary sealing rings are arranged in the third mounting grooves.

Description

Technical Field

[0001] This utility model belongs to the field of pistons, and specifically relates to a sealing piston. Background Technology

[0002] The piston is a reciprocating component in the hydraulic cylinder. It needs to continuously compress air during the movement of the piston rod. In general, the piston is sealed by a single sealing ring, which has a poor sealing effect. It is prone to leakage when encountering a large hydraulic load. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the prior art by providing a sealing piston.

[0004] The objective of this utility model can be achieved through the following technical solution: A sealing piston, comprising a cylinder, a piston rod, and a piston body located on the piston rod, characterized in that the piston body is provided with a plurality of mounting grooves I and a mounting groove II, an inner sealing ring I is provided in the mounting groove, an outer sealing ring I is provided on the outside of the inner sealing ring I and abutting against it, a mounting groove III is provided on the outer sealing ring I, and an auxiliary sealing ring is provided in the mounting groove III.

[0005] In the aforementioned type of sealing piston, two elastic parts for increasing support force are provided on the opposing side of the inner sealing ring and the outer sealing ring, and a buffer part for connection is provided between the elastic parts on the inner sealing ring and the outer sealing ring.

[0006] In the aforementioned type of sealing piston, both ends of the auxiliary sealing ring are provided with support portions that abut against the inner wall of the mounting groove, and the auxiliary sealing ring is also provided with fitting portions that abut against the inner wall of the cylinder.

[0007] In the aforementioned type of sealing piston, the outer sealing ring has buffer slopes at both ends that are inclined in three directions toward the mounting groove.

[0008] In the aforementioned type of sealed piston, the mounting groove 2 is located on one side in the direction of the piston rod. The mounting groove 2 is provided with two inner sealing rings 1 connected in parallel and integrally formed. On one side of the inner sealing ring 2, there is an outer sealing ring 2 that abuts against it and is integrally formed by two outer sealing rings connected in parallel.

[0009] In the aforementioned type of sealing piston, both the inner sealing ring 2 and the outer sealing ring 2 are provided with elastic parts, and the outer sealing ring has two mounting grooves 4 for installing auxiliary sealing rings.

[0010] Compared with existing technologies, this sealing piston achieves sealing through the cooperation of multiple sealing rings, which greatly increases the sealing effect. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main body of the sealed piston;

[0012] Figure 2 This is a cross-sectional view of the sealed piston;

[0013] Figure 3 This is a partial view of the sealed piston.

[0014] In the diagram, 1. Cylinder body; 2. Piston rod; 3. Piston body; 4. Mounting groove one; 5. Mounting groove two; 6. Inner sealing ring one; 7. Outer sealing ring one; 8. Mounting groove three; 9. Auxiliary sealing ring; 10. Elastic part; 11. Support part; 12. Fitting part; 13. Buffer slope; 14. Inner sealing ring two; 15. Outer sealing ring two; 16. Mounting groove four. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] like Figure 1 , Figure 2 , Figure 3 As shown, this sealed piston includes a cylinder body 1, a piston rod 2, and a piston body 3 located on the piston rod 2. The piston body 3 has several mounting grooves 1 4 and a mounting groove 2 5. An inner sealing ring 1 6 is provided in the mounting groove. An outer sealing ring 1 7 is provided on the outside of the inner sealing ring 1 6 to abut against it. An mounting groove 3 8 is provided on the outer sealing ring 1 7. An auxiliary sealing ring 9 is provided in the mounting groove 3 8.

[0017] Two elastic parts 10 for increasing support are provided on the opposite side of the inner sealing ring 6 and the outer sealing ring 7. A buffer part for connection is provided between the elastic parts 10 on the inner sealing ring 6 and the outer sealing ring 7.

[0018] The mounting groove 25 is located on one side in the direction of piston rod 2. The mounting groove 25 is provided with two inner sealing rings 16 connected in parallel and integrally formed as an inner sealing ring 24. On one side of the inner sealing ring 24, there is an outer sealing ring 25 that abuts against it and is integrally formed by two outer sealing rings connected in parallel.

[0019] Both the inner sealing ring 14 and the outer sealing ring 15 are provided with elastic parts 10, and the outer sealing ring has two mounting grooves 16 for installing the auxiliary sealing ring 9.

[0020] When the piston body 3 reciprocates, the inner wall of the cylinder 1 continuously rubs against the outer sealing ring 7. When the outer sealing ring 7 is subjected to force, it will push the force to the elastic part 10 on the other side. The elastic part 10 then interacts with the elastic part 10 of the inner sealing ring 6 to continuously elastically reset, returning the force to its original position, providing support for the contact area between the outer sealing ring 7 and the inner wall of the cylinder 1, thereby increasing the sealing performance.

[0021] When the outer sealing ring 7 is under force, the auxiliary sealing ring 9 will provide longitudinal support. When the auxiliary sealing ring 9 is squeezed, it will lift the fitting part 12, making it fit more closely to the inner wall of the cylinder body 1, thereby increasing the sealing performance.

[0022] Because the mounting groove 16 has a large opening and is located at the edge of the piston body 3, a larger outer sealing ring 15 can be installed. Repeat the above actions to provide basic sealing for the piston body 3.

[0023] To elaborate further, both ends of the auxiliary sealing ring 9 are provided with support parts 11 that abut against the inner wall of the mounting groove 8, and the auxiliary sealing ring 9 is also provided with fitting parts 12 that abut against the inner wall of the cylinder body 1.

[0024] To elaborate further, buffer slopes 13 inclined toward the mounting groove 8 are provided at both ends of the outer sealing ring 7.

[0025] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0026] Although this document frequently uses terms such as cylinder body 1, piston rod 2, piston body 3, mounting groove one 4, mounting groove two 5, inner sealing ring one 6, outer sealing ring one 7, mounting groove three 8, auxiliary sealing ring 9, elastic part 10, support part 11, fitting part 12, buffer slope 13, inner sealing ring two 14, outer sealing ring two 15, and mounting groove four 16, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A sealed piston, comprising a cylinder (1), a piston rod (2), and a piston body (3) located on the piston rod (2), characterized in that, The piston body (3) is provided with several mounting grooves 1 (4) and a mounting groove 2 (5). An inner sealing ring 1 (6) is provided in the mounting groove. An outer sealing ring 1 (7) is provided on the outside of the inner sealing ring 1 (6) and abuts against it. An mounting groove 3 (8) is provided on the outer sealing ring 1 (7). An auxiliary sealing ring (9) is provided in the mounting groove 3 (8).

2. A sealing piston according to claim 1, characterized in that, Two elastic parts (10) for increasing support force are provided on the opposite side of the inner sealing ring (6) and the outer sealing ring (7), and a buffer part for connection is provided between the elastic parts (10) on the inner sealing ring (6) and the outer sealing ring (7).

3. A sealing piston according to claim 1, characterized in that, The auxiliary sealing ring (9) is provided with support parts (11) at both ends that abut against the inner wall of the mounting groove (8), and the auxiliary sealing ring (9) is also provided with fitting parts (12) that abut against the inner wall of the cylinder (1).

4. A sealing piston according to claim 1, characterized in that, The outer sealing ring 1 (7) has buffer slopes (13) that are inclined toward the mounting groove 3 (8) at both ends.

5. A sealing piston according to claim 1, characterized in that, The mounting groove 2 (5) is located on one side in the direction of the piston rod (2). The mounting groove 2 (5) is provided with two inner sealing rings 1 (6) connected in parallel and integrally formed into an inner sealing ring 2 (14). On one side of the inner sealing ring 2 (14), there is an outer sealing ring 2 (15) that abuts against it and is integrally formed by two outer sealing rings connected in parallel.

6. A sealing piston according to claim 5, characterized in that, Both the inner sealing ring 2 (14) and the outer sealing ring 2 (15) are provided with elastic parts (10), and the outer sealing ring has two mounting grooves 4 (16) for installing auxiliary sealing rings (9).

Images