Shearer body for thin coal seam

Abstract

The present invention relates to a body of a shearer for thin coal seams, which includes a body housing and a traction system and an electric control system arranged in the body housing. The electric control system is arranged in the middle, and there are two sets of traction systems, which are respectively placed on the left and right sides of the electric control system. The spaces where the electric control system and the two sets of traction systems are located are independent of each other. The large, medium-sized, small and medium-sized, and small-sized parts of the traction system are mainly arranged at the front, middle, and rear parts of the body housing respectively. The large and medium-sized electrical parts of the electric control system are mainly arranged at the front and middle parts of the body housing, and the small and medium-sized electrical parts are mainly arranged at the middle and rear parts of the body housing. The height of the rear part of the body housing is not greater than that of the middle part, and the height of the middle part is not greater than that of the front part. Oil cylinder connection lugs and rocker arm connection lugs are provided at the front parts of the left and right sides outside the body housing. The present invention can enable the corresponding shearer to be more easily adapted to the mining requirements of thin or extremely thin coal seams in a working face with complex conditions such as low mining height and high hardness of coal and rock.

Description

Technical Field

[0001] The present invention relates to a coal shearer body, which is mainly designed for a low-profile high-power thin coal seam shearer, making the corresponding coal shearer more adaptable to the mining of thin or extremely thin coal seams in a complex working face with high coal and rock hardness and other conditions. Background Art

[0002] For the mining of thin or extremely thin coal seams, the mining height is often low (some mining heights reach the required 0.8 m), and the geological conditions are complex (such as the coexistence of coal and rock and high hardness), etc. Therefore, in order to improve the adaptability and reliability of the coal shearer, it is usually required that the body height of the thin coal seam shearer is getting lower and lower, while the installed power is getting larger and larger. However, with the increase in power, the sizes of the motor, transmission system, etc. usually increase correspondingly a lot. Therefore, the structural layout of the thin or extremely thin coal seam shearer is a key point and a difficult point in the structural design of this type of coal shearer.

[0003] The industry has proposed and gradually used a technical solution to move large and medium-sized components such as motors and transmission gears from above the original scraper conveyor to the side close to the coal wall, that is, to adopt the way of a suspended body to solve the layout problem of large and medium-sized components. This method has been adopted in thinner coal seam shearers. Although it can improve the structural layout problem to a certain extent, for example, it helps to increase the clearance for passing the machine, but at the same time, it brings other prominent problems, including the local structural height of the coal shearer on the side close to the coal wall is relatively high, the span between the left and right drums is relatively large, the adaptability of the drum to the mining height is poor, the machine surface height of the coal shearer under the support is high, the coal passing space above the scraper conveyor is small, and the adaptability to the undulating working face is poor, etc. Therefore, this solution is still difficult to meet the mining needs of extremely thin or thin coal seams, especially the mining needs of extremely thin or thin coal seams with low mining height and high coal and rock hardness and other complex conditions. Summary of the Invention

[0004] The present invention aims to provide a thin coal seam shearer body, through a new structural design, making the corresponding coal shearer more easily adaptable to the mining needs of thin or extremely thin coal seams in a complex working face with low mining height and high coal and rock hardness and other conditions.

[0005] The main technical solutions of the present invention are as follows:

[0006] A shearer body for thin coal seams, comprising a body housing, a traction system and an electric control system arranged within the body housing. The electric control system is arranged in the middle, and there are two sets of traction systems, which are respectively placed on the left and right sides of the electric control system. The spaces where the electric control system and the two sets of traction systems are located are independent of each other. The large and medium-sized parts, small and medium-sized parts, and small-sized parts of the traction system are mainly arranged at the front, middle, and rear parts of the body housing respectively. The large and medium-sized electrical parts of the electric control system are mainly arranged at the front and middle parts of the body housing, and the small and medium-sized electrical parts of the electric control system are mainly arranged at the middle and rear parts of the body housing. The height of the rear part of the body housing is not greater than that of the middle part, and the height of the middle part is not greater than that of the front part. Oil cylinder connection lugs and rocker arm connection lugs are provided on the left and right outer sides of the front part of the body housing.

[0007] Support shoe mounting interface structures and traveling system mounting interface structures are respectively provided at the middle and rear parts of the body housing, and there is one on each of the left and right sides for both the support shoe mounting interface structure and the traveling system mounting interface structure.

[0008] Within the body housing, a partition is provided between the high-voltage electrical parts and the low-voltage electrical parts. A large-piece disassembly and assembly opening is provided on the front surface of the body housing, and a top disassembly and assembly opening is provided on the top surface. Both the large-piece disassembly and assembly opening and the top disassembly and assembly opening communicate with the space where the large and medium-sized electrical parts are located.

[0009] Pump box connection interface structures can also be provided at the left and right ends of the rear part of the body housing.

[0010] Preferably, the traction system includes a high-speed stage reduction mechanism, an intermediate stage reduction mechanism, and a traction motor. The output shaft of the traction motor is coaxially and fixedly connected to the input end of the high-speed stage reduction mechanism. The output end of the high-speed stage reduction mechanism is coaxially and fixedly connected to the input end of the intermediate stage reduction mechanism. The traction motor and the high-speed stage reduction mechanism are respectively arranged at the front and middle parts of the body housing, and the intermediate stage reduction mechanism is arranged at the middle part of the body housing, and its output end is arranged on the outer side in the left and right direction of the input end.

[0011] Preferably, the high-speed stage reduction mechanism adopts a compact planetary mechanism.

[0012] The intermediate stage reduction mechanism is a fixed-axis transmission gear set, including a head gear assembly, an intermediate gear assembly, and a tail gear assembly arranged in sequence in the left and right direction according to the transmission direction. The transmission shafts of each gear assembly are arranged in parallel. The input end of the head gear assembly is coaxially and fixedly connected to the output end of the high-speed stage reduction mechanism. The intermediate gear assembly includes one gear and the transmission shaft supporting the gear or multiple gears meshing in sequence and the transmission shafts supporting each gear.

[0013] A large-torque braking mechanism can be provided at the end of the rotating shaft of the head gear assembly.

[0014] The fuselage housing can be divided into an intermediate section in the middle and walking support sections on the left and right sides of the intermediate section. In the full-width range in the front-rear direction, the top surface of the intermediate section is lower than the top surface of the walking support sections, and the bottom surface of the intermediate section is higher than the bottom surface of the walking support sections.

[0015] The top surface of the intermediate section can be divided into a front top surface of the intermediate section, a middle top surface of the intermediate section, and a rear top surface of the intermediate section in the front-rear direction; the bottom surface of the intermediate section can be divided into a front bottom surface of the intermediate section, a middle bottom surface of the intermediate section, and a rear bottom surface of the intermediate section in the front-rear direction; the top surface of the walking support section can be divided into a front top surface of the walking support section, a middle top surface of the walking support section, and a rear top surface of the walking support section in the front-rear direction; the bottom surface of the walking support section can be divided into a front bottom surface of the walking support section, a middle bottom surface of the walking support section, and a rear bottom surface of the walking support section in the front-rear direction; the front top surface of the intermediate section, the front bottom surface of the intermediate section, the front top surface of the walking support section, and the front bottom surface of the walking support section correspond to the front part of the fuselage housing, the middle top surface of the intermediate section, the middle bottom surface of the intermediate section, the middle top surface of the walking support section, and the middle bottom surface of the walking support section correspond to the middle part of the fuselage housing, the rear top surface of the intermediate section, the rear bottom surface of the intermediate section, the rear top surface of the walking support section, and the rear bottom surface of the walking support section correspond to the rear part of the fuselage housing. Both the rear top surface of the intermediate section and the rear top surface of the walking support section are inclined surfaces with the front higher than the rear, and both the rear bottom surface of the intermediate section and the rear bottom surface of the walking support section are concave surfaces with the middle concave in the front-rear direction.

[0016] The beneficial effects of the present invention are as follows:

[0017] The traction system and the electric control system are integrally installed in the same fuselage housing, canceling the structure of connecting conventional split components, making the fuselage of the shearer shorter and narrower, that is, more compact, making the corresponding shearer more adaptable to the undulating working face, and ensuring the overall reliability.

[0018] The large and medium-sized components in the traction system and the electric control system are arranged in area C near the coal wall side and beside the drum, the small and medium-sized components are arranged in area B under the thin beam of the support, and the small-sized components are arranged in area A under the thick beam of the support, which can make more reasonable use of space, ensuring that the low-fuselage high-power thin coal seam shearer has a lower machine surface height and a larger coal passing space. The overall structure of the fuselage can maintain sufficient clearances with the roof, floor, top beam of the support, and scraper conveyor, meeting the mining requirements of undulating roof and floor, coal gangue, etc., and ensuring the smooth mining of extremely thin or thin coal seams under complex conditions such as coal and rock.

[0019] The traction system adopts a compact planetary mechanism with a large reduction ratio in the high-speed stage, which can reduce the front-rear width dimension of the traction system, ensure the strength and stiffness of the planetary gear shaft, and provide a large reduction ratio, thereby reducing the size of the reduction mechanism in the intermediate section and increasing its service life.

[0020] By increasing or decreasing the number of transmission shafts included in the intermediate gear assembly and then replacing the fuselage housing with different lengths in the left and right directions, the span between the left and right traveling systems can be adjusted. When the span between the left and right traveling wheels is appropriately increased, the overall stability of the shearer can be improved without causing an increase in the distance between the left and right drums.

[0021] The top and bottom surfaces of the fuselage housing are segmented in the front-rear direction to have different heights to adapt to the environmental space sizes at different positions, so that there are sufficient and larger effective clearances between the fuselage housing and the roof, floor, roof beam, and scraper conveyor everywhere. Therefore, it can better ensure the adaptability of the shearer to undulating conditions.

[0022] Structures such as large-piece disassembly ports and top disassembly ports are provided on the local structure of the fuselage housing that houses the electric control system, greatly improving the maintainability of the electrical components of the low-fuselage shearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a horizontal sectional view of an embodiment of the present invention;

[0024] Figure 2 is Figure 1 the front view of

[0025] Figure 3 is Figure 1 the front sectional view of

[0026] Figure 4 is the longitudinal sectional view in the front-rear direction at the middle section;

[0027] Figure 5 is Figure 1 the enlarged view of the traction system in

[0028] Figure 6 is the longitudinal sectional view passing through the axis of the traction motor;

[0029] Figure 7 is Figure 1 the enlarged view of the electric control system in

[0030] Reference Signs:

[0031] 1. Body housing; 11. Rocker arm connection ear; 12. Cylinder connection ear; 13. Support slider mounting interface structure; 14. Travel system mounting interface structure; 15. Pump box connection interface structure; 16. Top surface of the middle section; 161. Front top surface of the middle section; 162. Middle top surface of the middle section; 163. Rear top surface of the middle section; 17. Bottom surface of the middle section; 171. Front bottom surface of the middle section; 172. Middle bottom surface of the middle section; 173. Rear bottom surface of the middle section; 18. Top surface of the travel support section; 181. Front top surface of the travel support section; 182. Middle top surface of the travel support section; 183. Rear top surface of the travel support section; 19. Bottom surface of the travel support section; 191. Front bottom surface of the travel support section; 192. Middle bottom surface of the travel support section; 193. Rear bottom surface of the travel support section;

[0032] 2. Traction system; 21 Traction motor; 22. High-speed section reduction mechanism; 23. Middle section reduction mechanism; 231. End gear assembly;

[0033] 3. Electric control system; 31. Large and medium-sized electrical components; 32. Small and medium-sized electrical components; 33. Output wiring cavity; 34. Large component disassembly and assembly opening; 35. Top disassembly and assembly opening; 36. Cable access port; 37. Partition wall;

[0034] 91. Support roof beam; 911. Thin support beam; 912. Thick support beam;

[0035] 92. Scraper conveyor. Detailed implementation manner

[0036] The present invention discloses a shearer body for thin coal seams, as Figure 1-7As shown in the figure, it includes a fuselage housing 1, a traction system 2 and an electric control system 3 arranged inside the fuselage housing. The electric control system is arranged in the middle. There are two sets of traction systems, which are respectively placed on the left and right sides of the electric control system. The spaces where the electric control system and the two sets of traction systems are located are independent of each other. Therefore, the fuselage housing is provided with multiple cavities. The traction system is arranged differently according to the sizes of its respective components within its own space. Generally speaking, the large and medium-sized components, small and medium-sized components, and small-sized components of the traction system are mainly arranged in the front, middle, and rear parts of the fuselage housing respectively. The large and medium-sized electrical components of the electric control system are mainly arranged in the front and middle parts of the fuselage housing, and the small and medium-sized electrical components of the electric control system are mainly arranged in the middle and rear parts of the fuselage housing. The height of the rear part of the fuselage housing is not greater than that of the middle part, and the height of the middle part is not greater than that of the front part. The division of the front, middle, and rear parts of the fuselage housing is determined with reference to the front and rear position relationships between the shearer, the support roof beam 91, and the scraper conveyor 92 during the cooperation of the three machines. Specifically, the area below the thick beam 912 of the support is denoted as area A, the area below the thin beam 911 of the support and extending forward to the rear edge position of the drum is denoted as area B, and the area corresponding to the full axial length range of the drum is denoted as area C. The front, middle, and rear parts of the fuselage housing correspond to area C, area B, and area A respectively. In this case, the larger the components in the traction system and the electric control system, the more forward they are arranged. The large and medium-sized components are all located in area C closer to the coal wall side and between the left and right drums. The small and medium-sized components are mainly arranged in area B, below the thin beam of the support. The small-sized components are mainly located in area A, below the thick beam of the support. By allocating the layout positions of the components according to the spatial height, the space can be utilized more reasonably to ensure that the low-fuselage high-power thin-seam shearer can have a lower machine surface height and a larger coal passing space. The overall structure of the fuselage can maintain sufficient gaps with the roof, floor, support roof beam 91, and scraper conveyor 92, meet the mining requirements of undulating roof and floor, coal gangue, etc., and ensure the smooth mining of extremely thin or thin seams under complex conditions such as coal and rock.

[0037] The traction system and the electric control system are integrally installed in the same fuselage housing, canceling the structure of connecting conventional split components, making the fuselage of the shearer short and narrow, that is, more compact, making the corresponding shearer more adaptable to the undulating working face, and ensuring the overall reliability.

[0038] Not only are the parts inside the fuselage housing arranged according to their sizes, but the height (or the thickness in the height direction) of the middle and rear parts of the fuselage housing itself is also designed to be smaller than that of the front part, that is, the smaller the size of the parts installed inside, the smaller the external size of the fuselage housing itself, which can make the fuselage more compact and is more conducive to maintaining a larger gap between the fuselage and the roof beam and the scraper conveyor.

[0039] On the left and right outer sides of the front part of the fuselage housing, an oil cylinder connecting ear 12 and a rocker arm connecting ear 11 can be successively arranged from front to back, which are respectively used for hinging the oil cylinder and the rocker arm of the cutting system. At that time, the oil cylinder and the rocker arm, which are important components of the cutting system, are also located in area C close to the coal wall side.

[0040] A support sliding shoe mounting interface structure 13 and a traveling system mounting interface structure 14 are respectively arranged in the middle and rear parts of the fuselage housing, which are respectively used for connecting and mounting the support sliding shoes and the traveling system. The support sliding shoes serve as the main fixed supports and support the middle part of the fuselage housing in the front-back direction from below. There is one support sliding shoe mounting interface structure and one traveling system mounting interface structure on each of the left and right sides. The two same interface structures on the left and right are preferably arranged at positions close to the left and right ends of the fuselage housing, that is, to maintain as large a span as possible to improve the support and traveling stability of the shearer.

[0041] Inside the fuselage housing, a partition wall 37 is arranged between the high-voltage electrical components and the low-voltage electrical components. Since the size of the high-voltage electrical components is usually larger than that of the low-voltage electrical components, the partition wall divides and isolates the high and low voltages and also divides and isolates the large and medium-sized electrical components 31 and the small and medium-sized electrical components 32. A large-component disassembly and assembly opening 34 can also be arranged on the front surface of the fuselage housing, and a top disassembly and assembly opening 35 can be arranged on the top surface. Both the large-component disassembly and assembly opening and the top disassembly and assembly opening communicate with the space where the large and medium-sized electrical components are located. An output wiring cavity 33 is also arranged in the space where the large and medium-sized electrical components are located. The above settings can greatly facilitate the maintenance of the electrical components. Cable access openings 36 can be respectively arranged on the outer side walls of the chambers on both sides of the partition wall to facilitate wiring.

[0042] On the left and right ends of the rear part of the fuselage housing, a pump box connection interface structure 15 can also be arranged, which can be used for installing an external independent pump box.

[0043] The traction system 2 preferably includes a high-speed deceleration mechanism 22, an intermediate deceleration mechanism 23, and a traction motor 21. The output shaft of the traction motor is coaxially and fixedly connected to the input end of the high-speed deceleration mechanism, and the output end of the high-speed deceleration mechanism is coaxially and fixedly connected to the input end of the intermediate deceleration mechanism. The traction motor and the high-speed deceleration mechanism are arranged one in front of the other at the front and middle parts of the fuselage shell respectively, reducing the space occupied by the traction system in the left-right direction. The intermediate deceleration mechanism mainly consists of small and medium-sized parts, which are arranged in the middle of the fuselage shell, and its output end is arranged on the outer side in the left-right direction of the input end, that is, the output end of the intermediate deceleration mechanism of the left traction system is located on the left side of the input end, and the output end of the intermediate deceleration mechanism of the right traction system is located on the right side of the input end. Compared with arranging the whole traction system in the front part of the fuselage shell, it is equivalent to reducing the space occupied by the traction system between the left and right drums. Therefore, the length of the shearer fuselage in the left-right direction can be shorter, which helps to shorten the distance between the two drums and greatly improves the adaptability of the thin coal seam shearer to the undulating working face.

[0044] The high-speed deceleration mechanism 22 preferably adopts a planetary mechanism, and further preferably a compact planetary mechanism to maintain a small axial dimension, ensure the strength and stiffness of the planetary gear shaft, and also helps to reduce the front-back width dimension of the traction system. The compact planetary mechanism can include a series-connected first-stage planetary mechanism and a second-stage planetary mechanism. The compact planetary mechanism can provide a large reduction ratio, which helps the intermediate deceleration mechanism to reduce its size and increase its service life.

[0045] The intermediate deceleration mechanism 23 is a fixed-axis transmission gear set, including a head gear assembly, an intermediate gear assembly, and a tail gear assembly 231 arranged in sequence in the left-right direction according to the transmission direction. The transmission shafts of each gear assembly are arranged in parallel. The input end of the head gear assembly is coaxially and fixedly connected to the output end of the high-speed deceleration mechanism. The intermediate gear assembly contains one gear and the transmission shaft supporting the gear or multiple gears meshing in sequence and the transmission shafts supporting each gear. There is a mounting hole corresponding to each position where the transmission shaft is located. Power is output to the traveling system through the tail gear assembly 231.

[0046] By increasing or decreasing the number of transmission shafts included in the intermediate gear assembly and then replacing the fuselage shell with different lengths in the left-right direction, the span between the left and right traveling systems can be adjusted. When the span between the left and right traveling wheels is appropriately increased, the overall stability of the shearer can be improved, and at the same time, the distance between the left and right drums will not increase.

[0047] A large-torque braking mechanism is provided at the end (also the rear end) of the rotating shaft of the head gear assembly. When the shearer stops, it is braked by the large-torque braking mechanism to prevent the shearer from sliding down when the working face has a large inclination angle.

[0048] The traction system adopts a compact planetary mechanism with a large reduction ratio in the high-speed stage and a traction motor to arrange medium and large-sized components in the space between the shearer drums and below the front of the support, ensuring sufficient effective clearances above, below, and in front of the traction system and between the drums. At the same time, the intermediate reduction mechanism of the traction system arranges small and medium-sized components below the thin top beam of the support, ensuring sufficient effective clearance above the shearer.

[0049] The fuselage housing can be divided into an intermediate section in the middle and walking support sections on both the left and right sides of the intermediate section. In the full-width range in the front-rear direction, the top surface of the intermediate section is lower than the top surfaces of the walking support sections, and the bottom surface of the intermediate section is higher than the bottom surfaces of the walking support sections. That is, compared with the walking support sections, the intermediate section has larger clearances with the roof, floor, top beam, and scraper conveyor, thus better ensuring the adaptability of the shearer to undulating conditions.

[0050] The top surface 16 of the intermediate section is divided into a front top surface 161, a middle top surface 162, and a rear top surface 163 of the intermediate section in the front-rear direction; the bottom surface 17 of the intermediate section is divided into a front bottom surface 171, a middle bottom surface 172, and a rear bottom surface 173 of the intermediate section in the front-rear direction; the top surface 18 of the walking support section is divided into a front top surface 181, a middle top surface 182, and a rear top surface 183 of the walking support section in the front-rear direction; the bottom surface 19 of the walking support section is divided into a front bottom surface 191, a middle bottom surface 192, and a rear bottom surface 193 of the walking support section in the front-rear direction.

[0051] The front top surface 161 and front bottom surface 171 of the intermediate section, the front top surface 181 and front bottom surface 191 of the walking support section correspond to the front part of the fuselage housing, corresponding to the roof upward and the floor downward. The middle top surface 162 and middle bottom surface 172 of the intermediate section, the middle top surface 182 and middle bottom surface 192 of the walking support section correspond to the middle part of the fuselage housing, corresponding to the thin beam of the support upward and the side of the conveyor trough downward. The rear top surface 163 and rear bottom surface 173 of the intermediate section, the rear top surface 183 and rear bottom surface 193 of the walking support section correspond to the rear part of the fuselage housing, corresponding to the thick beam of the support upward and the chute of the conveyor downward. The rear top surfaces 163 of the intermediate section and 183 of the walking support section are both inclined surfaces that are higher at the front and lower at the rear to maintain almost equal distances between their front and rear parts and the top beam of the support, ensuring sufficient effective clearance above the shearer. The rear bottom surfaces 173 of the intermediate section and 193 of the walking support section are both concave surfaces that are concave in the middle in the front-rear direction, so as to form a larger coal passing space between the fuselage housing and the chute of the scraper conveyor.

Claims

1. A body of a shearer for thin coal seams, characterized in that: It includes a body housing, a traction system and an electric control system arranged in the body housing. The electric control system is arranged in the middle. There are two sets of traction systems, which are respectively placed on the left and right sides of the electric control system. The spaces where the electric control system and the two sets of traction systems are located are independent of each other. The large and medium-sized parts, small and medium-sized parts and small-sized parts of the traction system are mainly arranged at the front, middle and rear parts of the body housing respectively. The large and medium-sized electrical parts of the electric control system are mainly arranged at the front and middle parts of the body housing, and the small and medium-sized electrical parts of the electric control system are mainly arranged at the middle and rear parts of the body housing. The height of the rear part of the body housing is not greater than that of the middle part, and the height of the middle part is not greater than that of the front part. Oil cylinder connection lugs and rocker arm connection lugs are provided on the left and right outer sides of the front part of the body housing. The area below the thick beam of the support in the three-machine cooperation state is denoted as area A, the area below the thin beam of the support and extending forward to the rear edge position of the drum is denoted as area B, and the area corresponding to the full axial length range of the drum is denoted as area C. The front, middle and rear parts of the body housing respectively correspond to area C, area B and area A.

2. The body of the shearer for thin coal seams according to claim 1, characterized in that: Support shoe mounting interface structures and traveling system mounting interface structures are respectively provided at the middle and rear parts of the body housing, and there is one on each of the left and right sides for both the support shoe mounting interface structure and the traveling system mounting interface structure.

3. The body of the shearer for thin coal seams according to claim 2, characterized in that: Inside the body housing, a partition is provided between the high-voltage electrical parts and the low-voltage electrical parts. A large part disassembly and assembly opening is provided on the front of the body housing, and a top disassembly and assembly opening is provided on the top surface. Both the large part disassembly and assembly opening and the top disassembly and assembly opening communicate with the space where the large and medium-sized electrical parts are located.

4. The body of the shearer for thin coal seams according to claim 3, characterized in that: Pump box connection interface structures are provided at the left and right ends of the rear part of the body housing.

5. The body of the shearer for thin coal seams according to claim 1, characterized in that: The traction system includes a high-speed stage reduction mechanism, an intermediate stage reduction mechanism and a traction motor. The output shaft of the traction motor is coaxially and fixedly connected to the input end of the high-speed stage reduction mechanism. The output end of the high-speed stage reduction mechanism is coaxially and fixedly connected to the input end of the intermediate stage reduction mechanism. The traction motor and the high-speed stage reduction mechanism are respectively arranged at the front and middle parts of the body housing, and the intermediate stage reduction mechanism is arranged at the middle part of the body housing, and its output end is arranged on the outer side in the left and right directions of the input end.

6. The body of the shearer for thin coal seams according to claim 5, characterized in that: The high-speed stage reduction mechanism adopts a compact planetary mechanism.

7. The body of the shearer for thin coal seams according to claim 6, characterized in that: The intermediate section speed reduction mechanism is a fixed-axis transmission gear set, including a head-end gear assembly, an intermediate gear assembly, and a tail-end gear assembly arranged in sequence in the transmission direction in the left-right direction. The transmission shafts of each gear assembly are arranged in parallel. The input end of the head-end gear assembly is coaxially and fixedly connected to the output end of the high-speed section speed reduction mechanism. The intermediate gear assembly includes a gear and the transmission shaft supporting the gear or multiple gears meshing and transmitting in sequence and the transmission shafts supporting each gear.

8. The fuselage of a thin coal seam shearer according to claim 7, wherein: A high-torque braking mechanism is provided at the end of the rotating shaft of the head-end gear assembly.

9. The fuselage of a thin coal seam shearer according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein: The fuselage housing is divided into an intermediate section in the middle and walking support sections on the left and right sides of the intermediate section. In the full-width range in the front-rear direction, the top surface of the intermediate section is lower than the top surface of the walking support section, and the bottom surface of the intermediate section is higher than the bottom surface of the walking support section.

10. The fuselage of a thin coal seam shearer according to claim 9, wherein: The top surface of the intermediate section is divided into a front top surface of the intermediate section, a middle top surface of the intermediate section, and a rear top surface of the intermediate section in the front-rear direction; the bottom surface of the intermediate section is divided into a front bottom surface of the intermediate section, a middle bottom surface of the intermediate section, and a rear bottom surface of the intermediate section in the front-rear direction; the top surface of the walking support section is divided into a front top surface of the walking support section, a middle top surface of the walking support section, and a rear top surface of the walking support section in the front-rear direction; The bottom surface of the walking support section is divided into a front bottom surface of the walking support section, a middle bottom surface of the walking support section, and a rear bottom surface of the walking support section in the front-rear direction; the front top surface of the intermediate section, the front bottom surface of the intermediate section, the front top surface of the walking support section, and the front bottom surface of the walking support section correspond to the front part of the fuselage housing, the middle top surface of the intermediate section, the middle bottom surface of the intermediate section, the middle top surface of the walking support section, and the middle bottom surface of the walking support section correspond to the middle part of the fuselage housing, the rear top surface of the intermediate section, the rear bottom surface of the intermediate section, the rear top surface of the walking support section, and the rear bottom surface of the walking support section correspond to the rear part of the fuselage housing. The rear top surface of the intermediate section and the rear top surface of the walking support section are both inclined surfaces with the front part higher than the rear part, and the rear bottom surface of the intermediate section and the rear bottom surface of the walking support section are both concave surfaces with the middle part concave in the front-rear direction.

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