Coal mining machine traction part shell with dustproof and noise reduction functions

Abstract

This utility model discloses a coal mining machine traction unit housing with dustproof and noise reduction functions, belonging to the field of coal mining machinery and equipment technology. It includes a housing body with a noise reduction layer made of porous sound-absorbing material fixed inside. A wear-resistant protective plate with through holes is glued to the inside of the noise reduction layer. Circular end caps are bolted to both ends of the housing body. A skeleton oil seal is installed inside the central shaft hole of the end cap, and a dustproof cover with concentric light holes is fixed to the outside, forming a double seal. The inspection port at the top of the housing is sealed by an inspection cover with a rubber sealing strip, and a sound insulation pad is installed inside the inspection cover. Rectangular heat dissipation windows are opened on the side walls of the housing, with a dustproof net on the inside and louvers on the outside. Shock-absorbing pads are connected to the bottom support feet. This utility model attenuates internal noise through a multi-layered noise reduction structure, and the multiple seals and dustproof design prevent underground dust intrusion. It also provides heat dissipation, shock absorption, and ease of maintenance, effectively extending the service life of the traction unit, improving the underground working environment, and is suitable for high-dust and high-vibration working conditions in coal mines.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machinery and equipment technology, specifically to the outer shell of the traction unit of a coal mining machine with dustproof and noise reduction functions. Background Technology

[0002] As a key piece of equipment in fully mechanized coal mining faces, the traction unit of a coal mining machine plays a crucial role in driving the entire machine and transmitting power. Internally, it contains precision components such as gearboxes, motors, and drive shafts. However, the harsh environment of underground coal mines is characterized by large amounts of coal dust, rock dust, and high humidity. Simultaneously, the traction unit generates high-intensity noise during operation due to gear meshing and motor vibration. Existing traction unit housings have significant technical defects: Firstly, their dustproof performance is insufficient. The gap between the end cover and the drive shaft in traditional housings easily allows dust to enter, accelerating the wear of bearings, gears, and other components. Some housings only use a single oil seal, which ages and fails after long-term use, requiring frequent shutdowns for maintenance. Secondly, their noise reduction effect is poor. Most housings are single-metal shell structures, which cannot effectively block internal transmission noise, harming the hearing health of operators and affecting underground communication safety. With the increasing demands for equipment reliability and working environment in intelligent coal mining, the development of a coal mining machine traction unit housing that combines efficient dustproofing, effective noise reduction, and convenient maintenance has become an urgent industry need.

[0003] Therefore, those skilled in the art have provided a housing for the traction unit of a coal mining machine with dustproof and noise reduction functions to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to provide a housing for the traction unit of a coal mining machine with dustproof and noise reduction functions, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The outer shell of the traction unit of a coal mining machine with dustproof and noise reduction functions includes an outer shell body. The outer shell body is a rectangular box structure with openings at both ends. A noise reduction layer is fixedly connected to the inner side of the outer shell body by countersunk bolts. The noise reduction layer is made of porous sound-absorbing material. A protective plate is fixedly connected to the inner side of the noise reduction layer by flame-retardant adhesive. The surface of the protective plate has multiple through holes, which are evenly distributed in a matrix. End caps are fixedly connected to both ends of the outer shell body with bolts evenly distributed in the circumference.

[0007] As a further embodiment of this utility model: the end cap is a circular plate structure, and an annular groove with a rectangular cross-section is opened on the inner edge of the end cap. A rubber sealing ring with a U-shaped cross-section is embedded in the annular groove, and the outer side of the rubber sealing ring is tightly fitted with the port end face of the outer shell body.

[0008] As a further improvement of this utility model: a shaft hole is provided at the center of the end cap, and a skeleton oil seal is fixedly installed on the inner side wall of the shaft hole through a bearing seat. The skeleton oil seal is made of nitrile rubber, and its lip is in close contact with the drive shaft passing through the shaft hole, with uniform and continuous contact pressure.

[0009] As a further embodiment of this utility model: a dust cover is fixedly installed on the outer side of the end cover by hexagonal bolts evenly distributed along the circumference. The dust cover is a circular plate structure with a light hole in the center that is concentric with the shaft hole of the end cover.

[0010] As a further improvement of this utility model: a rectangular inspection port is provided on the top of the main body of the outer shell, and an inspection cover is detachably installed on the outside of the inspection port by means of flange bolts. The inspection cover is a rectangular plate structure and its thickness is consistent with the wall thickness of the main body of the outer shell.

[0011] As a further improvement of this utility model: a sound insulation pad of the same material as the noise reduction layer is fixedly connected to the inner side of the inspection cover, and a rubber sealing strip is provided at the connection between the inspection cover and the outer shell body. The rubber sealing strip has a rectangular frame structure with a circular cross section and is fixed to the inner edge of the inspection cover by a slot.

[0012] As a further improvement of this utility model: a rectangular heat dissipation window is provided on one side wall of the main body of the outer shell, a dustproof net is fixedly installed on the inner side of the heat dissipation window by bolts, and an adjustable louver is connected to the outer side of the heat dissipation window by a hinge.

[0013] As a further improvement of this utility model: four cylindrical support feet are welded and fixed to the bottom of the outer shell body, and shock-absorbing pads are fixedly connected to the bottom of the support feet by bolts.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: First, the porous sound-absorbing and noise-reducing layer on the inner side of the outer shell, combined with the through-hole design of the protective plate, can effectively absorb internal transmission noise. Combined with the sound insulation pad on the inner side of the inspection cover, it significantly reduces the operating noise of the traction unit and improves the underground working environment. Second, the dual sealing structure of "skeleton oil seal + outer dust cover" is adopted. The rubber sealing ring on the edge of the end cover and the rubber sealing strip on the inspection cover form an all-round seal. The dustproof net on the inner side of the heat dissipation window and the louver on the outer side work together to block dust. Multiple protections greatly reduce the intrusion of coal dust and moisture, and extend the service life of internal components. Third, the protective plate protects the noise-reducing layer from wear and ensures acoustic transmission through the through holes, taking into account both protection and noise reduction efficiency. Fourth, the bottom shock-absorbing pad reduces vibration transmission and improves the stability of equipment operation. The detachable design of the inspection cover and dust cover facilitates daily maintenance without damaging the overall sealing structure. The whole system is suitable for the harsh working environment of the coal mining machine traction unit. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the overall structure of the outer shell of the traction unit of a coal mining machine with dustproof and noise reduction functions.

[0016] Figure 2 This is a schematic diagram of the structure of the middle end cover and heat dissipation window of the traction unit of a coal mining machine with dust prevention and noise reduction functions.

[0017] Figure 3 This is a schematic diagram of the protective plate and skeleton oil seal in the outer shell of the traction unit of a coal mining machine with dust prevention and noise reduction functions.

[0018] Figure 4 This is a half-sectional view of the outer casing of the traction unit of a coal mining machine with dustproof and noise reduction functions.

[0019] Figure 5 This is a schematic diagram of the maintenance cover inside the traction unit of a coal mining machine with dust and noise reduction functions.

[0020] Figure 6 This is a schematic diagram of the bottom structure of the outer shell of the traction unit of a coal mining machine with dustproof and noise reduction functions.

[0021] In the diagram: 1. Main body of the outer shell; 2. End cap; 3. Shaft hole; 4. Dust cover; 5. Light hole; 6. Inspection port; 7. Inspection cover; 8. Rubber sealing strip; 9. Noise reduction layer; 10. Protective plate; 11. Through hole; 12. Heat dissipation window; 13. Louver; 14. Dustproof net; 15. Support feet; 16. Shock-absorbing pad; 17. Frame oil seal; 18. Sound insulation pad. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Reference Figures 1-6 This embodiment provides a coal mining machine traction unit shell with dustproof and noise reduction functions, including a shell body 1. The shell body 1 is a rectangular box structure with openings at both ends. A noise reduction layer 9 is fixedly connected to the inner side of the shell body 1 by countersunk bolts. The noise reduction layer 9 is made of porous sound-absorbing material. A protective plate 10 is fixedly connected to the inner side of the noise reduction layer 9 by flame-retardant adhesive. The surface of the protective plate 10 has multiple through holes 11, which are evenly distributed in a matrix. End caps 2 are fixedly connected to the openings at both ends of the shell body 1 by bolts evenly distributed in the circumference.

[0025] Furthermore, the end cap 2 is a circular plate structure, and an annular groove with a rectangular cross-section is opened on the inner edge of the end cap 2. A rubber sealing ring with a U-shaped cross-section is embedded in the annular groove, and the outer side of the rubber sealing ring is tightly fitted to the end face of the port of the outer shell body 1.

[0026] Furthermore, a shaft hole 3 is provided at the center of the end cover 2. A skeleton oil seal 17 is fixedly installed on the inner side wall of the shaft hole 3 through a bearing seat. The skeleton oil seal 17 is made of nitrile rubber, and its lip is in close contact with the drive shaft passing through the shaft hole 3, with uniform and continuous contact pressure.

[0027] Furthermore, a dust cover 4 is fixedly installed on the outer side of the end cover 2 by hexagonal bolts evenly distributed along the circumference. The dust cover 4 is a circular plate structure with a light hole 5 in the center that is concentric with the shaft hole 3 of the end cover 2.

[0028] Example 2

[0029] Reference Figures 1-6 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that a rectangular inspection port 6 is provided on the top of the outer shell body 1. An inspection cover 7 is detachably installed on the outside of the inspection port 6 by means of flange bolts. The inspection cover 7 is a rectangular plate structure with a thickness consistent with the wall thickness of the outer shell body 1. A sound insulation pad 18 of the same material as the noise reduction layer 9 is fixedly connected to the inner side of the inspection cover 7. A rubber sealing strip 8 is provided at the connection between the inspection cover 7 and the outer shell body 1. The rubber sealing strip 8 has a rectangular frame structure with a circular cross-section and is fixed to the inner edge of the inspection cover 7 by means of a slot.

[0030] Furthermore, a rectangular heat dissipation window 12 is provided on one side wall of the outer shell body 1. A dustproof net 14 is fixedly installed on the inner side of the heat dissipation window 12 by bolts, and an adjustable louver 13 is connected to the outer side of the heat dissipation window 12 by hinges.

[0031] Furthermore, four cylindrical support feet 15 are welded and fixed to the bottom of the outer shell body 1, and shock-absorbing pads 16 are fixedly connected to the bottom of the support feet 15 by bolts.

[0032] This utility model features a dustproof and noise-reducing outer shell for a coal mining machine's traction unit. Through a multi-layered structure, it achieves dustproof, noise reduction, and protective functions. During operation, the main shell 1 serves as the foundational load-bearing structure. Its inner noise-reducing layer 9 absorbs vibration noise generated by internal transmission components (such as gears and motors) through porous sound-absorbing material. Noise is effectively attenuated by passing through the through-holes 11 on the surface of the protective plate 10 into the noise-reducing layer 9. The protective plate 10 also prevents direct wear from internal components on the noise-reducing layer 9. The end caps 2 are sealed to the main shell 1 with rubber sealing rings to prevent external dust from entering through gaps. When the drive shaft passes through the shaft hole 3 of the end cap 2, the inner skeleton oil seal 17 forms a first seal through close contact with the drive shaft via its lip. The outer dust cover 4's light hole 5 forms a second barrier with a clearance fit to the drive shaft. This dual structure prevents coal dust and moisture from entering the interior of the shell. The top inspection cover 7 is sealed with a rubber sealing strip 8, and the inner sound insulation pad 18 further enhances the noise reduction effect. Routine maintenance can be easily performed by disassembling the inspection cover 7. The bottom shock-absorbing pad 16 reduces the transmission of vibration from the traction unit to the machine body. The dustproof net 14 inside the heat dissipation window 12 intercepts dust, and the louver 13 on the outside adjusts the ventilation volume. While ensuring heat dissipation, it prevents pollutants from entering. The overall structure is designed with "sound absorption and noise reduction + multi-level dust prevention + sealing protection" to adapt to the harsh working conditions of high dust and high vibration in coal mines.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A coal mining machine traction part shell with dustproof and noise reduction function, comprising a shell main body (1), characterized in that, The outer shell body (1) is a rectangular box structure with openings at both ends. A noise reduction layer (9) is fixedly connected to the inner side of the outer shell body (1) by countersunk bolts. The noise reduction layer (9) is made of porous sound-absorbing material. A protective plate (10) is fixedly connected to the inner side of the noise reduction layer (9) by flame-retardant adhesive. Multiple through holes (11) are opened on the surface of the protective plate (10). The through holes (11) are evenly distributed in a matrix. End caps (2) are fixedly connected to the openings at both ends of the outer shell body (1) by bolts evenly distributed in the circumference.

2. The coal mining machine traction part shell with dustproof and noise reduction functions according to claim 1, characterized in that, The end cap (2) is a circular plate structure. The inner edge of the end cap (2) has an annular groove with a rectangular cross section. A rubber sealing ring with a U-shaped cross section is embedded in the annular groove. The outer side of the rubber sealing ring is tightly fitted to the port end face of the outer shell body (1).

3. The coal mining machine traction part shell with dustproof and noise reduction functions according to claim 2, characterized in that, The end cap (2) has a shaft hole (3) at its center. A skeleton oil seal (17) is fixedly installed on the inner wall of the shaft hole (3) through a bearing seat. The skeleton oil seal (17) is made of nitrile rubber. Its lip is in close contact with the drive shaft passing through the shaft hole (3), and the contact pressure is uniform and continuous.

4. The coal mining machine traction part shell with dustproof and noise reduction functions according to claim 3, characterized in that, The outer side of the end cap (2) is fixed with a dust cover (4) by hexagonal bolts evenly distributed along the circumference. The dust cover (4) is a circular plate structure with a light hole (5) in the center that is concentric with the shaft hole (3) of the end cap (2).

5. The coal mining machine traction part shell with dustproof and noise reduction functions according to claim 1, characterized in that, The top of the outer shell body (1) is provided with a rectangular inspection port (6). An inspection cover (7) is detachably installed on the outside of the inspection port (6) by means of flange bolts. The inspection cover (7) is a rectangular plate structure with a thickness consistent with the wall thickness of the outer shell body (1).

6. The coal mining machine traction unit housing with dust prevention and noise reduction function according to claim 5, characterized in that, The inner side of the inspection cover (7) is fixedly connected with a sound insulation pad (18) of the same material as the noise reduction layer (9). A rubber sealing strip (8) is provided at the connection between the inspection cover (7) and the outer shell body (1). The rubber sealing strip (8) has a rectangular frame structure with a circular cross section and is fixed to the inner side of the edge of the inspection cover (7) by a slot.

7. The coal mining machine traction part shell with dustproof and noise reduction functions according to claim 1, characterized in that, A rectangular heat dissipation window (12) is provided on one side wall of the outer shell body (1). A dustproof net (14) is fixedly installed on the inner side of the heat dissipation window (12) by bolts. An adjustable louver (13) is connected to the outer side of the heat dissipation window (12) by a hinge.

8. The outer shell of the coal mining machine traction unit with dustproof and noise reduction function according to claim 1, characterized in that, The bottom of the outer shell body (1) is welded and fixed with four cylindrical support feet (15), and the bottom of the support feet (15) is fixedly connected with shock-absorbing pads (16) by bolts.

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