Middle cylinder body of hydraulic breaking hammer

Abstract

The utility model provides a middle cylinder body of a hydraulic breaking hammer, and belongs to the field of breaking hammers. The problems that the hardness of a middle cylinder body is close to that of a piston, and the middle cylinder body is prone to galling in the reciprocating motion process of the piston in the middle cylinder body are solved. The middle cylinder body of the hydraulic breaking hammer comprises a base body, a coating structure used for enhancing the hardness and abrasion resistance of the base body is arranged on the inner wall face of the base body, and the thickness of the coating structure is 1-100 micrometers. The utility model has the advantage of improving the strength and wear resistance of the inner arm surface of the base body.

Description

Technical Field

[0001] The utility model belongs to the field of breaking hammers and relates to a hydraulic breaking hammer, in particular to a middle cylinder body of a hydraulic breaking hammer. Background Art

[0002] A hydraulic breaker is usually installed on an excavator, loader or power station for use. It has the advantages of large impact force, easy use, good mobility and high efficiency, and is widely used in destructive work such as mountain opening and quarrying. At present, the existing hydraulic breaker generally includes a front cylinder body, a middle cylinder body and a rear cylinder body. A drill rod is arranged in the front cylinder body, and the middle cylinder body is connected to the front cylinder body. A piston is arranged in the middle cylinder body. The piston performs a fixed period of reciprocating motion inside the middle cylinder body. A rear oil chamber is arranged at the rear of the middle cylinder body. In order to prevent the oil in the rear oil chamber from flowing out from the gap between the rear of the middle cylinder body and the piston, a piston sleeve is arranged between the piston and the rear of the middle cylinder body, and sealing rings are arranged on the inner and outer surfaces of the piston sleeve.

[0003] The middle cylinder is generally made of low-carbon alloy steel. The traditional manufacturing process of the middle cylinder is carburizing and quenching, and the carburizing process takes 27 hours, which is a long time. After the middle cylinder made of low-carbon alloy steel undergoes the carburizing and quenching heat treatment process, a hardened layer will form on the inner surface of the cylinder, and the surface hardness of the hardened layer can reach up to 63HRC. In the actual use of the hydraulic breaker assembled with the middle cylinder, the hardness of the middle cylinder is close to that of the piston. During the reciprocating movement of the piston in the middle cylinder, the middle cylinder is prone to roughening. Summary of the invention

[0004] The utility model aims to solve the above problems existing in the prior art and provides a middle cylinder body of a hydraulic breaker with good use effect, wear resistance, long service life and high strength.

[0005] The purpose of the utility model can be achieved through the following technical solutions: A middle cylinder body of a hydraulic breaker, including a substrate, characterized in that a coating structure for enhancing the hardness and wear resistance of the substrate is arranged on the inner wall surface of the substrate, and the thickness of the coating structure is 1-100um, the coating structure includes a metal coating, the metal coating directly covers the surface of the product, the coating structure includes a metal coating and a first coating, the metal coating directly covers the surface of the product, the first coating covers the surface of the metal coating, the coating structure includes a metal coating and a first coating, a second coating, the metal coating directly covers the surface of the product, the first coating covers the surface of the metal coating, the second coating covers the surface of the first coating, the coating structure includes a metal coating and a first coating, a second coating, the metal coating directly covers the surface of the product, the first coating covers the surface of the metal coating, the second coating covers the surface of the first coating, the coating structure includes a metal coating and a first coating, a second coating and a third coating, the metal coating directly covers the surface of the product, the first coating covers the surface of the metal coating, the second coating covers the surface of the first coating, and the third coating covers the surface of the second coating.

[0006] In the above-mentioned middle cylinder of a hydraulic breaker, the material of the metal coating can be steel, chromium, copper, aluminum, platinum, tungsten, and the thickness is 1-10um.

[0007] In the above-mentioned middle cylinder of a hydraulic breaker, the second coating material can be ceramic, graphite, carbon, metal-based, ceramic-based, and has a thickness of 1-10 um.

[0008] In the above-mentioned middle cylinder of a hydraulic breaker, the third coating material can be ceramic, graphite, carbon, metal-based, ceramic-based, and has a thickness of 1-10 um.

[0009] Compared with the prior art, the middle cylinder of the hydraulic breaker has a coating structure formed on the wall surface of the base to enhance hardness and improve wear resistance, so that the coating structure is completely and evenly covered on the base, thereby improving the strength and wear resistance of the inner arm surface of the base, making the wall surface of the base less likely to be scratched, and increasing the service life of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a cross-sectional view of the middle cylinder body of the hydraulic breaker.

[0011] Figure 2 It is a schematic diagram of the coating structure of the middle cylinder body of the hydraulic breaker.

[0012] Figure 3 It is a schematic diagram of the coating structure of the middle cylinder body of the hydraulic breaker.

[0013] Figure 4 It is a schematic diagram of the coating structure of the middle cylinder body of the hydraulic breaker.

[0014] Figure 5 It is a schematic diagram of the coating structure of the middle cylinder body of the hydraulic breaker.

[0015] In the figure, 1, substrate; 2, coating structure; 3, metal coating; 4, first coating; 5, second coating; 6, third coating. DETAILED DESCRIPTION

[0016] 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.

[0017] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the middle cylinder of the hydraulic breaker includes a substrate 1, and a coating structure 2 for enhancing the hardness and wear resistance of the substrate 1 is arranged on the inner wall surface of the substrate 1, and the thickness of the coating structure 2 is 1-100um. Since the inner wall of the substrate 1 has a vacuum coating to form a coating structure 2 for enhancing the hardness and improving the wear resistance, the thickness of the coating structure 2 is 1-100um, and the coating structure 2 is a multi-layer coating structure 2. The surface coating of the coating structure 2 is a metal coating 3, so that the coating is evenly distributed, the strength and wear resistance of the inner wall of the substrate 1 are improved, the inner wall of the substrate 1 is not easy to be scratched, and the service life is improved. The vacuum coating includes vacuum evaporation coating, vacuum sputtering coating, and vacuum ion coating. The coating structure 2 includes a metal coating 3. The metal coating 3 directly covers the surface of the product, the coating structure 2 includes the metal coating 3 and the first coating 4, the metal coating 3 directly covers the surface of the product, the first coating 4 covers the surface of the metal coating 3, the coating structure 2 includes the metal coating 3, the first coating 4, and the second coating 5, the metal coating 3 directly covers the surface of the product, the first coating 4 covers the surface of the metal coating 3, and the second coating 5 covers the surface of the first coating 4, the coating structure 2 includes the metal coating 3, the first coating 4, the second coating 5 and the third coating 6, the metal coating 3 directly covers the surface of the product, the first coating 4 covers the surface of the metal coating 3, the second coating 5 covers the surface of the first coating 4, and the third coating 6 covers the surface of the second coating 5.

[0018] To further elaborate, the material of the metal coating 3 can be steel, chromium, copper, aluminum, platinum, or tungsten, with a thickness of 1-10 um.

[0019] To further elaborate, the material of the first coating 4 can be ceramic, graphite, carbon, metal-based, ceramic-based, with a thickness of 1-10 um.

[0020] To further elaborate, the second coating 5 material can be ceramic, graphite, carbon, metal-based, ceramic-based, with a thickness of 1-10 um.

[0021] To further elaborate, the third coating 6 material can be ceramic, graphite, carbon, metal-based, ceramic-based, with a thickness of 1-10 um.

[0022] 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.

[0023] Although the terms such as substrate 1, coating structure 2, metal coating 3, first coating 4, second coating 5, and third coating 6 are frequently used in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A middle cylinder of a hydraulic breaker, comprising a base (1), characterized in that: A coating structure (2) for enhancing the hardness and wear resistance of the substrate (1) is arranged on the inner wall surface of the substrate (1), and the thickness of the coating structure (2) is 1-100 um. The coating structure (2) comprises a metal coating (3) and a first coating (4), a second coating (5) and a third coating (6). The metal coating (3) directly covers the surface of the product, the first coating (4) covers the surface of the metal coating (3), the second coating (5) covers the surface of the first coating (4), and the third coating (6) covers the surface of the second coating (5).

2. The middle cylinder of a hydraulic breaker according to claim 1, characterized in that The material of the metal coating (3) is steel, chromium, copper, aluminum, platinum, tungsten, and the thickness is 1-10um.

3. The middle cylinder of a hydraulic breaker according to claim 1, characterized in that The first coating (4) is made of ceramic, graphite, carbon, metal-based, or ceramic-based materials, and has a thickness of 1-10 um.

4. The middle cylinder of a hydraulic breaker according to claim 1, characterized in that The second coating (5) is made of ceramic, graphite, carbon, metal-based, or ceramic-based materials, with a thickness of 1-10 um.

5. The middle cylinder of a hydraulic breaker according to claim 1, characterized in that The third coating (6) is made of ceramic, graphite, carbon, metal-based, or ceramic-based materials, with a thickness of 1-10 um.

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