Hydraulic hammer piston with anti-rust structure

Abstract

The utility model discloses a hydraulic hammer piston with antirust structure, including piston main part, the outer surface of piston main part is provided with the polishing layer, the outer surface of polishing layer is provided with the first antirust layer, the outer surface of first antirust layer is provided with the second antirust layer, the outer surface of second antirust layer is provided with the wear -resisting layer, and the outer portion of piston main part is provided with hydraulic hammer main part, and one end of hydraulic hammer main part is provided with the connecting flange, the utility model discloses through setting up oil pump, oil pipe, oil groove, sealing strip and sealing groove, in the use process of piston main part, utilize oil pump, and the antirust lubricating oil in the inside of oil storage box is pumped to the inside of oil groove through oil pipe, thereby lets piston main part when doing reciprocating motion, forms the oil film on the outer surface of piston main part, thereby avoids the rusted condition of piston main part to be affected by outside water vapor, and can improve sleeve sealing property with the cooperation of sealing strip and sealing groove, prevents the scattering of antirust lubricating oil and appears the situation of spilling, and further improves the antirust effect of piston main part through this mode.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic hammer technology, and in particular to a hydraulic hammer piston with a rust-proof structure. Background Technology

[0002] Hydraulic hammers, as indispensable high-efficiency impact crushing equipment in the engineering construction field, are widely used in various complex engineering scenarios, such as ore liberation in mining, roadbed compaction and old pavement demolition in road construction, concrete structure crushing in building demolition, and foundation pit excavation and tunnel excavation in rock breaking, thanks to their core advantages of large crushing force, high operating efficiency, and wide applicability. Their core working principle is to use the high-pressure power output from the hydraulic system to drive an internal piston in a high-speed reciprocating linear motion along the cylinder. During this motion, the piston efficiently converts hydraulic energy into kinetic energy, generating concentrated impact force through high-frequency, high-intensity, and violent impacts with the chisel (or impact block). This impact force is then stably transmitted to the workpiece, such as rock or concrete, ultimately achieving precise crushing, compaction, and rock drilling. In this power transmission and energy conversion process, the piston, as the core moving component of the hydraulic hammer, must not only directly bear the continuous driving force of the high-pressure hydraulic oil but also resist the high-frequency alternating impact loads generated during the impact process. Simultaneously, it must maintain a high-precision sliding fit with the cylinder to ensure the sealing of the hydraulic system and the efficiency of power transmission. Therefore, the structural stability, motion accuracy, wear and corrosion resistance, and service life of the piston directly determine the overall reliability and efficiency of the hydraulic hammer, which in turn affects the progress of engineering construction and the overall cost of use. It is one of the key indicators for measuring the core competitiveness of hydraulic hammer products.

[0003] Existing hydraulic hammers are rust-proofed by chrome plating the surface. However, the plating is prone to peeling off due to friction and impact during long-term high-speed reciprocating motion. Once the plating is damaged, the piston base is exposed to the external environment, which can lead to corrosion and rust on the piston's outer surface, thus affecting the normal use of the piston.

[0004] Therefore, how to provide a hydraulic hammer piston with a rust-proof structure is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this invention is to provide a hydraulic hammer piston with a rust-proof structure to solve the problems mentioned in the background art.

[0006] A hydraulic hammer piston with an anti-rust structure according to an embodiment of the present invention includes a piston body, a grinding layer on the outer surface of the piston body, a first anti-rust layer on the outer surface of the grinding layer, a second anti-rust layer on the outer surface of the first anti-rust layer, a wear-resistant layer on the outer surface of the second anti-rust layer, a hydraulic hammer body on the outside of the piston body, a connecting flange on one end of the hydraulic hammer body, an oil reservoir on the outer circumference of the hydraulic hammer body, an oil pump on one end of the oil reservoir, an oil pipe on one side of the oil pump, a sleeve on one end of the oil pipe, an oil inlet on the outer circumference of the sleeve, an oil groove inside the sleeve, a sealing strip on one side of the oil groove, and a sealing groove on the outside of the sealing strip.

[0007] As a preferred embodiment of this utility model: the polishing layer is formed on the outer surface of the piston body by sandblasting, and the roughness Ra is 3.2-6.3μm.

[0008] As a further preferred embodiment of this utility model: the first anti-rust layer is a zinc phosphate film layer, the thickness of the first anti-rust layer is 2-5μm, and the first anti-rust layer is attached to the outer surface of the polishing layer.

[0009] As a further preferred embodiment of this utility model: the second anti-rust layer is a polyvinyl fluoride coating, the thickness of the second anti-rust layer is 5-10μm, and the second anti-rust layer is attached to the outer surface of the first anti-rust layer.

[0010] As a further preferred embodiment of this utility model: the wear-resistant layer is a chromium nitride coating, the thickness of the wear-resistant layer is 8-15μm, its hardness is ≥HV1800, and its friction coefficient is ≤0.15. The wear-resistant layer is used as an auxiliary layer on the outer surface of the second anti-rust layer.

[0011] As a further preferred embodiment of this utility model: one end of the oil pipe is fixedly connected to the output end of the oil pump, the other end of the oil pipe is fixedly connected to the input end of the oil inlet, and the inside of the oil pipe is connected to the oil tank through the oil inlet.

[0012] As a further preferred embodiment of this utility model: the number of oil inlets is two sets, and the oil inlets are symmetrically installed on the outer ring surface of the sleeve.

[0013] As a further preferred embodiment of this utility model: the sealing strip is made of fluororubber, the sealing strip is installed on both sides of the oil groove, and the sealing strip is snapped into the sealing groove.

[0014] The beneficial effects of this utility model are: 1. This patent, by setting a grinding layer, a first anti-rust layer, a second anti-rust layer, and a wear-resistant layer, improves the surface roughness of the piston body during processing by using the grinding layer, thereby enhancing the adhesion of the first anti-rust layer. Then, the combination of the first and second anti-rust layers improves the anti-rust effect of the piston body's outer surface, preventing rusting caused by external environmental factors. Furthermore, the wear-resistant layer improves the wear resistance of the piston body's outer surface, preventing wear on the first and second anti-rust layers during reciprocating motion. In this way, the anti-rust effect of the piston body is improved, thereby extending the service life of the piston body.

[0015] 2. This patent, by setting up an oil pump, oil pipe, oil tank, sealing strip, and sealing groove, allows the oil pump to pump the rust-preventive lubricating oil inside the oil reservoir into the oil tank during the piston's operation. This creates an oil film on the outer surface of the piston body during reciprocating motion, preventing rust caused by external moisture. Furthermore, the combination of the sealing strip and sealing groove improves the sleeve's sealing performance, preventing leakage of the rust-preventive lubricating oil. This method further enhances the rust-preventive effect of the piston body. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall appearance of a hydraulic hammer piston with a rust-proof structure proposed in this utility model.

[0017] Figure 2 This is a schematic cross-sectional view of the piston body of a hydraulic hammer piston with a rust-proof structure proposed in this utility model.

[0018] Figure 3 This is a schematic diagram showing the distribution of oil pipes and oil inlet nozzles in a hydraulic hammer piston with a rust-proof structure proposed in this utility model.

[0019] Figure 4 This is a plan view of the sleeve of a hydraulic hammer piston with a rust-proof structure proposed in this utility model.

[0020] The attached diagram shows: 1. Piston body; 2. Grinding layer; 3. First anti-rust layer; 4. Second anti-rust layer; 5. Wear-resistant layer; 6. Hydraulic hammer body; 7. Connecting flange; 8. Oil reservoir; 9. Oil pump; 10. Oil pipe; 11. Sleeve; 111. Oil inlet; 12. Oil groove; 13. Sealing strip; 14. Sealing groove. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] refer to Figures 1-4 As shown, a hydraulic hammer piston with a rust-proof structure includes a piston body 1. A grinding layer 2 is provided on the outer surface of the piston body 1. A first rust-proof layer 3 is provided on the outer surface of the grinding layer 2. A second rust-proof layer 4 is provided on the outer surface of the first rust-proof layer 3. A wear-resistant layer 5 is provided on the outer surface of the second rust-proof layer 4. A hydraulic hammer body 6 is provided outside the piston body 1. A connecting flange 7 is provided at one end of the hydraulic hammer body 6. An oil reservoir 8 is provided on the outer ring surface of the hydraulic hammer body 6. An oil pump 9 is provided at one end of the oil reservoir 8. An oil pipe 10 is provided on one side of the oil pump 9. A sleeve 11 is provided at one end of the oil pipe 10. An oil inlet 111 is provided on the outer ring surface of the sleeve 11. An oil groove 12 is provided inside the sleeve 11. A sealing strip 13 is provided on one side of the oil groove 12. A sealing groove 14 is provided on the outer side of the sealing strip 13.

[0023] refer to Figure 2 As shown, the polishing layer 2 is a rough surface formed on the outer surface of the piston body 1 by sandblasting, with a roughness Ra of 3.2-6.3 μm. The polishing layer 2 improves the roughness of the outer surface of the piston body 1, thereby enhancing the adhesion of the first anti-rust layer 3. The first anti-rust layer 3 is a zinc phosphate film layer with a thickness of 2-5 μm. It adheres to the outer surface of the polishing layer 2 and improves the anti-rust effect of the piston body 1. The second anti-rust layer 4 is a polyvinyl fluoride coating with a thickness of 5 μm. -10μm, the second anti-rust layer 4 is attached to the outer surface of the first anti-rust layer 3. The second anti-rust layer 4 can improve the overall anti-rust effect of the piston body 1. The wear-resistant layer 5 is a chromium nitride coating with a thickness of 8-15μm, a hardness ≥HV1800, and a friction coefficient ≤0.15. The wear-resistant layer 5 is used to assist the outer surface of the second anti-rust layer 4. The wear-resistant layer 5 can improve the wear resistance of the outer surface of the piston body 1 and prevent the first anti-rust layer 3 and the second anti-rust layer 4 from wearing when the outer surface of the piston body 1 is in reciprocating motion.

[0024] refer to Figure 1 and Figure 3As shown, one end of the oil pipe 10 is fixedly connected to the output end of the oil pump 9, and the other end of the oil pipe 10 is fixedly connected to the input end of the oil inlet 111. The inside of the oil pipe 10 is connected to the oil tank 12 through the oil inlet 111. The oil pump 9 pumps the anti-rust lubricating oil inside the oil storage box 8 into the oil tank 12 through the oil pipe 10, so that when the piston body 1 is reciprocating, an oil film is formed on the outer surface of the piston body 1, preventing the piston body 1 from rusting due to external moisture. There are two sets of oil inlets 111, which are symmetrically installed on the outer ring surface of the sleeve 11. By setting two sets of oil inlets 111, the oil intake effect of the oil tank 12 can be improved.

[0025] refer to Figure 3 and Figure 4 As shown, the sealing strip 13 is made of fluororubber. The sealing strip 13 is installed on both sides of the oil groove 12. The sealing strip 13 is engaged with the sealing groove 14. By utilizing the cooperation between the sealing strip 13 and the sealing groove 14, the sealing performance of the sleeve 11 can be improved, preventing the leakage of rust-preventive lubricating oil.

[0026] Working principle: When using the piston body 1, the operator installs the hydraulic hammer body 6 onto the instrument via the connecting flange 7, and then connects the hydraulic oil pipe to the hydraulic hammer body 6. During use, the first anti-rust layer 3 and the second anti-rust layer 4 work together to improve the rust prevention effect on the outer surface of the piston body 1, preventing rust caused by external environmental factors. Furthermore, the wear-resistant layer 5 enhances the wear resistance of the outer surface of the piston body 1, preventing wear on the first and second anti-rust layers 3 and 4 during reciprocating motion. This method improves the rust prevention effect of the piston body 1, thereby extending the service life of the piston body 1. Then, during the use of the piston body 1, the oil pump 9 pumps the rust-preventive lubricating oil inside the oil reservoir 8 into the oil tank 12 through the oil pipe 10, so that when the piston body 1 is reciprocating, an oil film is formed on the outer surface of the piston body 1, preventing the piston body 1 from rusting due to external moisture. Furthermore, the cooperation between the sealing strip 13 and the sealing groove 14 can improve the sealing performance of the sleeve 11 and prevent the rust-preventive lubricating oil from leaking. In this way, the rust prevention effect of the piston body 1 is further improved.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hydraulic hammer piston with a rust-proof structure, characterized in that, The piston body (1) includes a grinding layer (2) on its outer surface, a first anti-rust layer (3) on its outer surface, a second anti-rust layer (4) on its outer surface, a wear-resistant layer (5) on its outer surface, a hydraulic hammer body (6) on its outer surface, a connecting flange (7) on one end of the hydraulic hammer body (6), an oil reservoir (8) on the outer ring of the hydraulic hammer body (6), an oil pump (9) on one end of the oil reservoir (8), an oil pipe (10) on one side of the oil pump (9), a sleeve (11) on one end of the oil pipe (10), an oil inlet (111) on the outer ring of the sleeve (11), an oil groove (12) inside the sleeve (11), a sealing strip (13) on one side of the oil groove (12), and a sealing groove (14) on the outer side of the sealing strip (13).

2. A hydraulic hammer piston with rust-proof structure according to claim 1, characterized in that, The polishing layer (2) is a rough surface formed on the outer surface of the piston body (1) by sandblasting, with a roughness Ra of 3.2-6.3 μm.

3. A hydraulic hammer piston with an anti-rust structure according to claim 2, characterized in that, The first anti-rust layer (3) is a zinc phosphate film layer, the thickness of the first anti-rust layer (3) is 2-5μm, and the first anti-rust layer (3) is attached to the outer surface of the polishing layer (2).

4. A hydraulic hammer piston with an anti-rust structure according to claim 3, characterized in that, The second rust-proof layer (4) is a polyvinyl fluoride coating. The thickness of the second rust-proof layer (4) is 5-10 μm. The second rust-proof layer (4) is attached to the outer surface of the first rust-proof layer (3).

5. A hydraulic hammer piston with an anti-rust structure according to claim 4, characterized in that, The wear-resistant layer (5) is a chromium nitride coating. The wear-resistant layer (5) has a thickness of 8-15μm, a hardness ≥HV1800, and a friction coefficient ≤0.

15. The wear-resistant layer (5) is applied to the outer surface of the second anti-rust layer (4).

6. A hydraulic hammer piston with an anti-rust structure according to claim 5, characterized in that, One end of the oil pipe (10) is fixedly connected to the output end of the oil pump (9), and the other end of the oil pipe (10) is fixedly connected to the input end of the oil inlet (111). The inside of the oil pipe (10) is connected to the oil tank (12) through the oil inlet (111).

7. A hydraulic hammer piston with an anti-rust structure according to claim 6, characterized in that, The number of oil inlets (111) is two sets, and the oil inlets (111) are symmetrically installed on the outer ring surface of the sleeve (11).

8. A hydraulic hammer piston with an anti-rust structure according to claim 7, characterized in that, The sealing strip (13) is made of fluororubber and is installed on both sides of the oil tank (12). The sealing strip (13) is engaged with the sealing groove (14).

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