Contact assembly of large gear and connecting plate of hydraulic rock drill

Abstract

A large gear and connecting plate contact assembly of a hydraulic rock drill relates to the technical field of rock drill equipment and comprises a middle connecting plate, a contact piece is arranged on the side face of the middle connecting plate, contact gaskets are arranged on the contact face of the contact piece and the large gear of the hydraulic rock drill at intervals, each contact gasket is of a round structure and is a hard alloy gasket, and the contact pieces are made of hard alloy. According to the large gear and connecting plate contact assembly of the hydraulic rock drill, the contact gasket of a hard alloy structure serves as the contact part of the large gear and the middle connecting plate on the hydraulic rock drill, when the gear rotates, the middle connecting plate cannot be damaged, meanwhile, the gear and the large gear cannot be sintered together after long-time operation, and the service life of the gear is prolonged. Therefore, the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of rock drill equipment, in particular to a contact assembly between a large gear and a connecting plate of a hydraulic rock drill. Background Art

[0002] When the GL08D hydraulic rock drill impacts, it will be subject to a rebound force. All the rebound forces are transmitted to the rock drill through the joint surface between the large gear and the intermediate connecting plate, making the rock drill bear all the rebound forces. Therefore, the joint surface between the large gear and the intermediate connecting plate must have high hardness and good impact resistance. The joint surface between the large gear and the intermediate connecting plate is both impacted and rotating, so it is very easy to generate a large amount of heat. When the existing hydraulic rock drill is in use, during the long-term operation, the contact surface between the large gear and the intermediate connecting plate is likely to sinter together, resulting in a decrease in its service life. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a contact assembly between a large gear and a connecting plate of a hydraulic rock drill. The contact assembly uses a contact gasket made of cemented carbide structure as the contact part between the large gear and the intermediate connecting plate of the hydraulic rock drill. When the gear rotates, it will not cause damage to the intermediate connecting plate. At the same time, it will not sinter with the large gear during long-term operation, thus increasing the service life and effectively solving the problems in the background art.

[0004] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical scheme:

[0005] A contact assembly between a large gear and a connecting plate of a hydraulic rock drill includes an intermediate connecting plate. A contact member is provided on the side of the intermediate connecting plate. Contact gaskets are arranged at intervals on the contact surface between the contact member and the large gear of the hydraulic rock drill. The contact gaskets are of a circular structure and are cemented carbide gaskets.

[0006] Furthermore, it further includes heat dissipation fins, and the heat dissipation fins are fixed on the inner end surface of the contact gasket.

[0007] Furthermore, it further includes a thermally conductive silicone sheet, and the thermally conductive silicone sheet is pasted at the connection between the heat dissipation fins and the contact gasket.

[0008] Furthermore, it further includes a heat exchange cavity, and the heat exchange cavity is opened inside the contact member, and the heat dissipation fins extend into the inside of the heat exchange cavity.

[0009] Furthermore, it further includes a dust-proof net. A ventilation opening communicating with the inside of the heat exchange cavity is opened on the side of the contact member, and the dust-proof net is fixed at the ventilation opening of the heat exchange cavity.

[0010] Furthermore, the edge side of the contact end surface of the contact gasket is of a chamfered structure.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The large gear and the connecting plate contact assembly of this hydraulic rock drill have the following advantages: The large gear on the hydraulic rock drill contacts the contact gasket of the contact part on the intermediate connecting plate. The contact gasket is a cemented carbide gasket. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. When the large gear rotates, it will not cause damage to the intermediate connecting plate. At the same time, it will not sinter with the large gear during long-term operation, thus increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0013] Figure 2 is a three-dimensional sectional structural schematic diagram of the present utility model;

[0014] Figure 3 is a structural schematic diagram of the assembly position of the contact assembly of the present utility model on the rock drill.

[0015] In the figure: 1 intermediate connecting plate, 2 contact part, 3 dust-proof net, 4 contact gasket, 5 heat dissipation fins, 6 thermal conductive silicone sheet, 7 heat exchange cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present utility model can be explained in detail through the following embodiments. The purpose of disclosing the present utility model is to protect all technical improvements within the scope of the present utility model.

[0017] Please refer to Figures 1 - 3 , this embodiment provides a technical solution: A large gear and connecting plate contact assembly of a hydraulic rock drill, including an intermediate connecting plate 1. A contact part 2 is provided on the side of the intermediate connecting plate 1. Contact gaskets 4 are arranged at intervals on the contact surface between the contact part 2 and the large gear of the hydraulic rock drill. The contact gasket 4 is of a circular structure. The contact gasket 4 is a cemented carbide gasket. The large gear on the hydraulic rock drill contacts the contact gasket 4 of the contact part 2 on the intermediate connecting plate 1. The contact gasket 4 is a cemented carbide gasket. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. When the large gear rotates, it will not cause damage to the intermediate connecting plate 1. At the same time, it will not sinter with the large gear during long-term operation, thus increasing the service life.

[0018] It further includes a heat dissipation fin 5 which is fixed on the inner end face of the contact gasket 4, a thermal conductive silica gel sheet 6 which is pasted at the connection between the heat dissipation fin 5 and the contact gasket 4, and a heat exchange cavity 7 which is opened inside the contact part 2. The heat dissipation fin 5 extends into the inner side of the heat exchange cavity 7. The heat on the contact gasket 4 is transferred to the inside of the heat exchange cavity 7 through the heat dissipation fin 5, and the heat in the heat exchange cavity 7 is discharged to the outside through the ventilation opening. The dust-proof net 3 is used to prevent foreign objects from the outside from entering the heat exchange cavity 7 through the ventilation opening. The thermal conductive silica gel sheet 6 is used to reduce the contact thermal resistance generated between the surface of the heat source and the contact surface of the heat dissipation device. The heat resistance of the contact gasket 4 is further improved through heat dissipation.

[0019] It further includes a dust-proof net 3. A ventilation opening communicating with the inside of the heat exchange cavity 7 is opened on the side surface of the contact part 2. The dust-proof net 3 is fixed at the ventilation opening position of the heat exchange cavity 7. The dust-proof net 3 is used to prevent foreign objects from the outside from entering the heat exchange cavity 7 through the ventilation opening.

[0020] The edge side of the contact end face of the contact gasket 4 is a chamfered structure, and this chamfered position is formed by grinding so as to keep it smooth.

[0021] The working principle of a contact assembly between the large gear and the connecting plate of a hydraulic rock drill provided by the present utility model is as follows: The large gear on the hydraulic rock drill contacts the contact gasket 4 of the contact part 2 on the intermediate connecting plate 1. The contact gasket 4 is a hard alloy gasket. Hard alloy has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. When the large gear rotates, it will not cause damage to the intermediate connecting plate 1. At the same time, it will not sinter with the large gear during long-term operation, thereby increasing the service life. The heat on the contact gasket 4 is transferred to the inside of the heat exchange cavity 7 through the heat dissipation fin 5, and the heat in the heat exchange cavity 7 is discharged to the outside through the ventilation opening. The dust-proof net 3 is used to prevent foreign objects from the outside from entering the heat exchange cavity 7 through the ventilation opening. The thermal conductive silica gel sheet 6 is used to reduce the contact thermal resistance generated between the surface of the heat source and the contact surface of the heat dissipation device. The edge side of the contact end face of the contact gasket 4 is a chamfered structure, and this chamfered position is formed by grinding so as to keep it smooth.

[0022] It should be noted that the components disclosed in the above embodiments are all common standard components or components known to those skilled in the art, and their structures and principles can all be known by those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0023] The parts not detailed in the present utility model are prior arts. Although the present utility model is specifically shown and introduced in combination with the preferred implementation embodiments, there are many methods and ways to specifically implement the technical solution. The above description is only the preferred implementation manner of the present utility model. However, those skilled in the art should understand that various changes can be made to the present utility model in terms of form and details without departing from the spirit and scope of the present utility model defined by the appended claims, and all of them fall within the protection scope of the present utility model.

Claims

1. A contact component between the large gear and the connecting plate of a hydraulic rock drill, comprising an intermediate connecting plate (1), characterized in that: A contact member (2) is provided on the side surface of the intermediate connecting plate (1). Contact gaskets (4) are provided at intervals on the contact surface of the contact member (2) and the large gear of the hydraulic rock drill. The contact gasket (4) is of a circular structure and is a cemented carbide gasket.

2. The contact assembly between the large gear and the connecting plate of a hydraulic rock drill according to claim 1, characterized in that: It further includes heat dissipation fins. The heat dissipation fins (5) are fixed on the inner end surface of the contact gasket (4).

3. The contact assembly between the large gear and the connecting plate of a hydraulic rock drill according to claim 2, characterized in that: It further includes a thermal conductive silicone sheet (6). The thermal conductive silicone sheet (6) is pasted at the connection between the heat dissipation fins (5) and the contact gasket (4).

4. A contact assembly between the large gear and the connecting plate of a hydraulic rock drill according to claim 2, characterized in that: It further includes a heat exchange cavity (7). The heat exchange cavity (7) is opened inside the contact member (2), and the heat dissipation fins (5) extend into the inside of the heat exchange cavity (7).

5. The contact assembly between the large gear and the connecting plate of a hydraulic rock drill according to claim 4, characterized in that: It further includes a dust-proof net (3). A ventilation opening communicating with the inside of the heat exchange cavity (7) is opened on the side surface of the contact member (2), and the dust-proof net (3) is fixed at the ventilation opening position of the heat exchange cavity (7).

6. The contact assembly between the large gear and the connecting plate of a hydraulic rock drill according to claim 1, characterized in that: The side of the contact end surface of the contact gasket (4) is of a chamfered structure.

Images