Piston ring of hydraulic breaking hammer

Abstract

The utility model provides a piston ring of a hydraulic breaking hammer, and belongs to the field of breaking hammers. The piston ring solves the problems that when an existing piston ring of the breaking hammer works for a long time under high load, an oil seal in the piston ring is abraded, and the sealing performance is reduced. The piston ring of the hydraulic breaking hammer comprises a piston ring body, a first step seal groove, a second step seal groove and a third step seal groove are sequentially formed in the inner ring face of the piston ring body from left to right, and sealing pieces with the sealing function are installed in the first step seal groove, the second step seal groove and the third step seal groove respectively. A plurality of balance structures which are matched with the step seal grooves I and the step seal grooves II and are used for reducing and controlling the oil pressure of the piston ring are arranged on the inner wall of the piston ring. The sealing ring has the advantages of being good in sealing performance and wear-resisting performance.

Description

Technical Field

[0001] The utility model belongs to the field of breaker hammers and relates to a breaker hammer piston ring, in particular to a hydraulic breaker hammer piston ring. Background Art

[0002] In order to break stones, concrete and other construction materials, a breaker hammer can be attached to various machines, such as an excavator, a backhoe or other similar machines. The breaker hammer is mounted on the arm of the machine and connected to the hydraulic system. The high-pressure fluid in the hydraulic system is supplied to the breaker hammer to drive the piston in contact with the working tool to reciprocate and strike the working tool to complete the breaking task.

[0003] As an important part of the breaker hammer, the sealing performance of the piston ring directly affects the working efficiency and service life of the breaker hammer. However, the existing breaker hammer piston rings on the market will experience problems such as wear and reduced sealing performance under long-term high-load operation, resulting in reduced working efficiency and service life of the breaker hammer piston ring, and even failure. Summary of the invention

[0004] The utility model aims to solve the above problems existing in the prior art and provides a hydraulic breaker piston ring with high efficiency sealing and long service life.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a hydraulic breaker hammer piston ring, including a piston ring body, characterized in that a seal groove 1, a seal groove 2 and a seal groove 3 are sequentially opened on the inner ring surface of the piston ring body from left to right, and the seal groove 1, the seal groove 2 and the seal groove 3 are all installed with sealing members for sealing, and a plurality of balancing structures are arranged on the inner wall of the piston ring to cooperate with the seal groove 1 and the seal groove 2 for reducing and controlling the oil pressure of the piston ring.

[0006] In the above-mentioned hydraulic breaker piston ring, the balance structure includes a plurality of balance grooves, and the corresponding balance groove is located between the first seal groove and the second seal groove, and the corresponding balance groove is located on the left side of the first seal groove.

[0007] In the above-mentioned hydraulic breaker piston ring, a sealing groove is arranged on the outer wall of the piston ring body, and a double-sided sealing ring is arranged on the sealing groove to prevent leakage of gas and hydraulic oil.

[0008] In the above-mentioned hydraulic breaker piston ring, the first seal groove, the second seal groove, the third seal groove and the balance groove are all in the shape of circular rings.

[0009] Compared with the prior art, the hydraulic breaker hammer piston ring has a simple structure with multiple sealing structures, is easy to manufacture, low cost, and has good sealing performance and wear resistance. It can effectively improve the working efficiency of the breaker hammer and the service life of the piston ring and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional structural schematic diagram of the piston ring of the hydraulic breaker.

[0011] Figure 2 It is a cross-sectional view of the piston ring of this hydraulic breaker.

[0012] In the figure, 1. piston ring body; 2. Step seal groove 1; 3. Step seal groove 2; 4. Step seal groove 3; 5. sealing element; 6. balancing structure; 7. balancing groove; 8. sealing groove; 9. double-sided sealing ring. DETAILED DESCRIPTION

[0013] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0014] like Figure 1 , Figure 2 As shown, the hydraulic breaker piston ring comprises a piston ring body 1, on the inner ring surface of the piston ring body 1 are sequentially provided with a step seal groove 2, a step seal groove 3 and a step seal groove 4 from left to right, and the step seal groove 1 2, the step seal groove 2 3 and the step seal groove 3 4 are all installed with sealing members 5 for sealing, and on the inner wall of the piston ring are provided a plurality of balancing structures 6 which cooperate with the step seal groove 1 2 and the step seal groove 2 3 for reducing and controlling the oil pressure of the piston ring, and the balancing structure 6 is used to reduce the impact of the hydraulic oil on the seal 5 inside the piston ring, so that the oil pressure of the hydraulic oil is more uniform, and the oil pressure of the hydraulic oil passing through the piston ring body 1 is reduced.

[0015] To further elaborate, the balancing structure 6 includes a plurality of balancing grooves 7, and the corresponding balancing groove 7 is located between the seal groove 1 2 and the seal groove 2 3, and the corresponding balancing groove 7 is located on the left side of the seal groove 1 2. By providing the balancing groove 7 in the seal groove 1 2 and the seal groove 2 3, it helps to reduce the oil pressure of the seal groove 1 2 and the seal groove 2 3 and increase the sealing performance of the seal groove 1 2 and the seal groove 2 3.

[0016] To be more specific, a sealing groove 8 is provided on the outer wall of the piston ring body 1, and a double-sided sealing ring 9 is provided on the sealing groove 8 for preventing leakage of gas in the rear cylinder body and hydraulic oil in the middle cylinder body.

[0017] To elaborate further, the Step seal groove 1 2 , the Step seal groove 2 3 , the Step seal groove 3 4 and the balance groove 7 are all in annular shape, and the annular shape has better sealing performance.

[0018] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0019] Although the terms such as piston ring body 1, Step seal groove 1 2, Step seal groove 2 3, Step seal groove 3 4, seal 5, balance structure 6, balance groove 7, seal groove 8, double-sided seal ring 9 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A hydraulic breaker piston ring, comprising a piston ring body (1), characterized in that: The inner ring surface of the piston ring body (1) is provided with a step seal groove 1 (2), a step seal groove 2 (3) and a step seal groove 3 (4) from left to right, and the step seal groove 1 (2), the step seal groove 2 (3) and the step seal groove 3 (4) are all installed with sealing members (5) for sealing. The inner wall of the piston ring is provided with a plurality of balancing structures (6) which cooperate with the step seal groove 1 (2) and the step seal groove 2 (3) for reducing and controlling the oil pressure of the piston ring.

2. A hydraulic breaker piston ring according to claim 1, characterized in that: The balancing structure (6) comprises a plurality of balancing grooves (7), wherein the corresponding balancing groove (7) is located between the first step sealing groove (2) and the second step sealing groove (3), and the corresponding balancing groove (7) is located on the left side of the first step sealing groove (2).

3. A hydraulic breaker piston ring according to claim 1, characterized in that: A sealing groove (8) is provided on the outer wall of the piston ring body (1), and a double-sided sealing ring (9) is provided on the sealing groove (8) for preventing leakage of gas and hydraulic oil.

4. A hydraulic breaker piston ring according to claim 1, characterized in that: The first seal groove (2), the second seal groove (3), the third seal groove (4) and the balance groove (7) are all in the shape of a circular ring.

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