Guiding and traction system of short span thin coal seam shearer

Abstract

The present invention relates to a guide and traction system for a short-span, thin-seam coal mining machine, comprising a guide device, a traction connection device, and a scraper conveyor. The guide device comprises a guide shoe and a track, the track being laid in a straight line in the left-right direction. The guide shoe is mounted near the rear of the machine body and supports the machine body from below. The guide shoe straddles the track through its guide groove and is slidably connected to the track. The traction connection device comprises a connecting plate, a connecting hook, a chain trough body, and a traction chain. One end of the connecting plate is hinged to the machine body, and the other end of the connecting plate is hinged to one end of the connecting hook. The hinge axes of these two hinges extend left and right. The other end of the connecting hook is configured as a cylindrical structure with a left-right extending axis. The cylindrical structure is disposed in the chain trough and is slidably connected thereto. The traction chain is connected to the cylindrical structure. The track and the chain trough body are both mounted on the trough body of the scraper conveyor. The present invention can solve the wear problem of chain traction in thin or extremely thin coal seam coal mining machines.

Description

Technical Field

[0001] The invention relates to a guiding and traction system for a coal mining machine, and is particularly suitable for a short-span thin coal seam coal mining machine for mining thin or extremely thin coal seams. Background Art

[0002] For the mining of thin or extremely thin coal seams, the mining height is often low (for example, some mining height requirements reach 0.8m). Therefore, the height of the coal mining machine face must be very low, but the coal passing space under the machine body cannot be too low, otherwise it will affect the circulation of coal. How to solve the contradiction between the machine face height and the coal passing space is a difficulty in the structural design of coal mining machines for thin or extremely thin coal seams.

[0003] In response to the above problems, the industry's solution is to use chain traction, which can greatly increase the coal passing space above the scraper conveyor and below the machine body, but there is a wear problem with the chain traction system. For safety reasons, to prevent the coal mining machine traction chain from breaking and posing a safety hazard to the operators, the traction chain is generally set in the chain groove on the conveying equipment. However, the existing chain traction guide device is an integrated structure, and it is mostly fixedly connected to the coal mining machine. On the one hand, its ability to adapt to ups and downs is poor. On the other hand, the chain groove not only has to withstand the traction force, but also needs to withstand the cutting reaction force of the coal mining machine. Therefore, the chain groove wears more severely, and it is inconvenient to replace it after wear, and even the entire conveying equipment needs to be replaced, which seriously affects the overall service life of the conveying equipment. Summary of the Invention

[0004] The present invention aims to provide a guide traction system for a short-span thin coal seam coal shearer, which can solve the wear problem of the chain traction of the thin or very thin coal seam coal shearer.

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

[0006] The traction connecting device comprises a connecting plate, a connecting hook, a chain trough body and a traction chain, and a traction chain is connected to the connecting plate.

[0007] The upper part of the guide shoe is hinged to the fuselage by passing a swivel pin, and the hinge axis extends forward and backward. A gap is left between the guide shoe and the fuselage in the up and down and front and back directions. The pin hole for passing the swivel pin on the guide shoe is a waist-shaped hole with a left and right width greater than the top and bottom width. The front and rear side surfaces of the guide shoe are smooth transition surfaces with the middle part facing outward and the left and right ends facing inward.

[0008] Regarding the traction connection device, one end of the connecting plate is hinged to the fuselage by passing an upper connecting pin, and the diameter of the pin hole on the connecting plate for passing the upper connecting pin is larger than the upper connecting pin.

[0009] The track is composed of a plurality of track units arranged in a straight line end to end in the left and right directions. The track unit is door-shaped, including a guide plate and a left connecting plate and a right connecting plate fixed to the left and right ends of the guide plate and supporting the guide plate. A plurality of track seats are fixed on the rear side of the chute of the scraper conveyor, and each track seat is arranged at intervals in the left and right directions. The middle part of the track seat is provided with a track slot that passes through the upper and lower parts for the left connecting plate and / or the right connecting plate to be plugged in. The right connecting plate of the left track unit and the left connecting plate of the right track unit of the two adjacent track units are inserted into the same track slot. The left connecting plate and the right connecting plate are gap-matched with the track slot in the front-to-back direction. The gaps between the left connecting plate and the right connecting plate and between each of them and the track slot are preferably all pre-compressed and filled with high elastic body. The left connecting plate and the right connecting plate are each limited by a track pin passed through the front-to-back direction between the left connecting plate and the right connecting plate and the track pin. The track seat and the track pin are limited by a pin passed through the vertical direction. The chain slot body is fixed to the rear side of the track seat. The two are in contact with each other front and back, and the contact surface is positioned by a positioning pin.

[0010] The rail seat is provided with a rail pin hole that passes through the front and back. The rail pin hole is preferably a waist-shaped hole with a left and right width greater than the upper and lower widths. The left connecting plate and the right connecting plate are both provided with positioning pin holes. The positioning pin holes are round holes or waist-shaped holes. The rail pin cooperates with the rail pin hole and the positioning pin hole at the same time.

[0011] The chain trough body extends left and right, and the chain groove is arranged on the upper part of the chain trough body. The lower part of the chain trough body can be spaced apart in the left and right directions with front-to-back through-pushing grooves, pin hole grooves and leakage material discharge grooves.

[0012] The chain slot body can be set as a split structure of a chain slot base and a chain slot disassembly plate. The chain slot disassembly plate can be detachably fixed to the front upper part of the chain slot base, and the two form a complete chain slot, wherein the chain slot disassembly plate is used to form the front upper quarter boundary of the chain slot, and the front lower quarter of the chain slot is open.

[0013] The guiding and traction system of the short-span thin coal seam coal mining machine can also be provided with a supporting slipper, which is preferably installed in the middle front part of the front-to-back direction of the fuselage and supports the fuselage from below. The upper part of the supporting slipper is hinged to the fuselage, and the hinge axis extends forward and backward. The bottom of the supporting slipper is provided with two supporting surfaces, one in front and one in the back, which are the second supporting surface and the first supporting surface respectively.

[0014] The first supporting surface is higher than the second supporting surface, and both the first supporting surface and the second supporting surface are provided with a wear-resistant layer.

[0015] The beneficial effects of the present invention are:

[0016] The present invention combines independent and detachable guide and traction devices, allowing them to perform both guiding and traction functions. The traction chain is connected to the machine body via multiple hinged joints, providing a certain degree of flexibility in both the front-to-back and top-to-bottom directions. This allows the guide device to withstand the shearer's cutting reaction force, while the traction connection device only withstands the left-to-right traction force. This significantly reduces wear on the chain slots and significantly increases the lifespan of the traction device. This advantage becomes more pronounced the greater the shearer's power and traction force.

[0017] The waist-shaped design of the track pin holes allows the track units to maintain a floating connection relative to the track bases. When the conveyor chute bends horizontally or vertically, the relative positions of the track slots in different track bases may shift. The track units can float accordingly with the forward, backward, upward, downward, and leftward and rightward displacements of the chute. Without any additional forces, they maintain an effective connection with the track bases and proper contact and cooperation with the guide shoes, continuing to perform their normal guiding function.

[0018] The gaps between the left connecting plate and the right connecting plate of the track unit and between each of them and the track slot are all pre-compressed and filled with high-elasticity, which can effectively prevent coal powder, mineral materials, etc. from entering the gaps, and prevent the floating amplitude of the track unit relative to the track seat from being reduced or the floating failure caused by the gaps being gradually filled with hard objects.

[0019] The present invention adopts a supporting sliding shoe with double supporting surfaces, which not only increases the contact surface exponentially, but also the second supporting surface can move the supporting position toward the coal wall, greatly improving the stability of the suspended body coal shearer.

[0020] The surfaces of the guide shoes and the rails have been specially treated to resist wear, and are easily replaceable parts. Once worn to a certain degree, they can be replaced individually without affecting the service life of associated equipment such as scraper conveyors. This significantly reduces maintenance costs and greatly improves overall work efficiency and equipment operation reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the lateral arrangement of an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A top view of the scraper conveyor in FIG;

[0023] Figure 3 for Figure 1 A front view of the guide and traction system;

[0024] Figure 4 for Figure 1 A1-A1 sectional view (main view of the chain trough body);

[0025] Figure 5 for Figure 1 A2-A2 sectional view (sectional view of the chain trough body);

[0026] Figure 6 for Figure 1 A3-A3 sectional view (main view of the track unit and track seat);

[0027] Figure 7 for Figure 1 A4-A4 cross-sectional view (cross-sectional view of the track unit and track seat);

[0028] Figure 8 for Figure 2 B1-B1 cross-sectional view (cross-sectional view of the rear connection group);

[0029] Figure 9 for Figure 2 B2-B2 sectional view (track seat sectional view);

[0030] Figure 10 for Figure 2 B3-B3 sectional view (sectional view of the sliding seat);

[0031] Figure 11 for Figure 1 C1-C1 sectional view (horizontal sectional view of scraper conveyor chute);

[0032] Figure 12 A front view of an embodiment of a guide rail unit;

[0033] Figure 13 is a cross-sectional view of an embodiment of a guide device;

[0034] Figure 14 is a cross-sectional view of an embodiment of a traction connection device;

[0035] Figure 15 Schematic diagram of the structure of an embodiment of the supporting shoe.

[0036] Reference numerals:

[0037] 1. Coal mining machine;

[0038] 11. Guide device; 111. Guide shoe; 1111. Lower guide surface; 1112. Front guide surface; 1113. Upper guide surface; 1114. Rear guide surface; 112. Rotation pin;

[0039] 12. Traction connection device; 121. Connecting plate; 122. Upper connecting pin; 123. Lower connecting pin; 124. Connecting hook; 125. Chain connecting pin; 126. Traction chain; 13. Support shoe; 131. Double ear seat; 134. First wear-resistant layer; 135. Second wear-resistant layer;

[0040] 2. Scraper conveyor;

[0041] 21. Slot body; 211. Track seat; 2111. Track slot; 2112. Track pin hole; 2113. Side slot; 212. Sliding seat; 2121. Sliding seat main plate; 2122. Sliding seat sub-plate; 2123. Sliding seat sealing plate; 214. Rear connecting slot;

[0042] 22. Track; 221. Track unit; 2211. Guide plate; 2212. Left connecting plate; 2213. Right connecting plate; 2214. Positioning pin hole; 2215. Lower friction surface; 2216. Front friction surface; 2217. Upper friction surface; 2218. Rear friction surface; 222. Track pin; 223. High elastic body; 224. Latch;

[0043] 231. Chain slot body; 2311. Chain slot; 2312. Push slot; 2313. Pin hole slot; 2314. Leakage material discharge slot; 232. Positioning pin; 233. Chain slot fastener; 234. Chain slot removal plate;

[0044] 241. Cable trough; 242. Cable trough fasteners;

[0045] 25. Anterior connection group;

[0046] 26. Rear connecting assembly; 261. Rear connecting pin; 262. Stop pin; 263. Cover plate. DETAILED DESCRIPTION

[0047] The present invention discloses a guide and traction system for a short-span thin-seam coal mining machine (hereinafter referred to as a guide and traction system). Figure 1-15As shown, it includes a guide device 11, a traction connection device 12, and a scraper conveyor 2. The guide device includes a guide shoe 111 and a track 22. The track is laid in a straight line along the left and right directions of the coal wall in the groove of the scraper conveyor. The guide shoe is removably mounted on the rear part of the body of the coal mining machine 1 and supports the body from below. The guide shoe straddles the track through its guide groove and is connected to the track for left and right sliding. The guide shoe balances part of the weight of the body, withstands the cutting reaction force, and has a guiding function along the track. The traction connection device 12 includes a connecting plate 121, a connecting hook 124, a chain trough body 231, and a traction chain 126. One end of the connecting plate is hinged to the body, and the other end of the connecting plate is hinged to one end of the connecting hook. The hinge axes of these two hinges extend left and right. The other end of the connecting hook is configured as a cylindrical structure with an axis extending left and right. This structure is conveniently positioned within the chain slot 2311 of the chain trough body along with the traction chain and slidably connected to the chain trough body. The traction chain is connected to the cylindrical structure, specifically, a traction chain is connected to each end of the cylindrical structure. Both the rail and the chain trough body are removably mounted on the trough body 21 of the scraper conveyor. Applying traction in the left and right directions to the traction chain can drive the coal mining machine left and right. The present invention utilizes independent and detachable guide devices that cooperate with the traction connection device, each performing guiding and traction functions. The traction chain is connected to the machine body via multiple hinged joints, providing a certain degree of flexibility in both the front-to-back and upper-lower directions. Therefore, the cutting reaction force of the coal mining machine is borne by the guide device 11, while the traction connection device 12 only bears traction in the left-to-right direction. Therefore, the vertical and rear lateral forces that may be applied to the chain slot 2311 are minimal, significantly reducing wear and significantly extending the life of the traction connection device 12. Furthermore, the guide device and the traction connection device can be replaced separately after wear, which will not affect the service life of the scraper conveyor and significantly reduce the maintenance cost. The greater the power and traction force of the coal mining machine, the more obvious the above advantages of the mobile system of the present invention.

[0048] The upper portion of the guide shoe is hinged to the machine body via a common pivot pin 112, with the hinge axis extending forward and backward. The guide shoe can swing about the pivot pin in a vertical plane extending left and right to accommodate the fluctuations of the working surface floor. Furthermore, the pin hole in the guide shoe, through which the pivot pin is inserted, is preferably a waist-shaped hole with a greater left-right width than a top-bottom width. Both the front and rear sides of the guide shoe preferably have smooth transition surfaces with the center facing outward and the left and right ends facing inward. This ensures that the guide shoe can deflect within the horizontal plane to accommodate the horizontal curvature of the working surface floor. "Outward" here refers to the front and rear sides, respectively, pointing forward and backward. In this embodiment, the left and right portions of the front and rear sides of the guide shoe are each configured as a vertical slope. The horizontally and vertically swingable guide shoe 111 ensures that the shearer follows the track of the scraper conveyor chute, which fluctuates forward and backward with the fluctuations of the floor. The guide device withstands the forward and backward, upward and downward reaction forces generated by the shearer cutting the material, thus stabilizing the shearer.

[0049] The guide groove has an L-shaped cross-section, with one end of the L pointing downward. The area at the other end of the L has four sides that engage with the rail. The four upper, lower, front, and rear surfaces of this area, respectively, serve as the upper guide surface 1113, lower guide surface 1111, front guide surface 1112, and rear guide surface 1114 of the guide groove. Each guide surface is provided with a wear-resistant layer.

[0050] The track 22 is composed of a plurality of track units 221 arranged in a straight line in the left and right directions. The track unit is in the shape of a door, including a horizontally installed guide plate 2211 and a left connecting plate 2212 and a right connecting plate 2213 fixed to the left and right ends of the guide plate and supporting the guide plate. A number of track seats 211 are fixed to the rear side of the chute of the scraper conveyor, providing a basis for the installation, fixation and floating of the track. The track seats are arranged at intervals in the left and right directions. A track slot 2111 that passes through the top and bottom for the left connecting plate and / or the right connecting plate to be inserted is provided in the middle of the track seat, which is used to insert the left and right connecting plates of the track unit. A side groove 2113 is also provided at the lower part of the left and / or right side of the track seat to facilitate the unloading and discharge of coal dust and gangue. The right connecting plate of the left track unit and the left connecting plate of the right track unit in the two adjacent track units are inserted into the same track slot. The left connecting plate and the right connecting plate are matched with the track slot gap in the front-to-back direction. The gaps between the left connecting plate and the right connecting plate and between each of them and the track slot (mainly the gaps in the left-to-right direction) are all pre-compressed and filled with a high elastic body 223 (such as a high elastic sponge) to prevent coal powder and the like from entering the gaps. As the relative position of the track and the chute changes, the gaps are always kept filled, and leakage prevention is reliable.

[0051] The track base is provided with a track pin hole 2112 extending from front to back for inserting a track pin 222, thereby securing the track unit to the track base. The track pin hole is preferably a waist-shaped hole with a greater left-right width than a top-to-bottom width. Both the left and right connecting plates are provided with a positioning pin hole 2214 for mating with the track pin 222 holes. The positioning pin hole can be round or waist-shaped. The track pin mates with both the track pin hole and the positioning pin hole to achieve a floating connection. The track base and the track pin can be secured by a vertical insertion pin 224. The waist-shaped design of the track pin hole allows the track unit to maintain a floating connection relative to the track base. When the conveyor chute bends horizontally or vertically, the relative positions of the track slots 2111 of different track bases may shift. The track unit 221 can float accordingly as the chute moves forward, backward, upward, downward, or left and right. This allows the track unit 221 to maintain an effective connection with the track base and proper contact and engagement with the guide shoe without any additional forces, thus continuing to perform its normal guiding function.

[0052] The chain slot body 231 is fixed to the rear side of the rail seat by a chain slot fastener 233 , and the two fit together front to back, and the fitting surface is positioned by a positioning pin 232 .

[0053] The front and rear widths of the guide plate are greater than those of the left and right connecting plates, and the front side surface of the guide plate extends beyond the front side surfaces of the left and right connecting plates. The front side surface, rear side surface, top surface and bottom surface of the guide plate extending forward beyond the left and right connecting plates are surfaces that cooperate with the guide groove, namely the front friction surface 2216, the rear friction surface 2218, the upper friction surface 2217 and the lower friction surface 2215, which respectively contact and work with the front guide surface 1112, the rear guide surface 1114, the upper guide surface 1113 and the lower guide surface 1111 of the guide groove.

[0054] The surfaces of the guide shoes and rails have been specially treated to resist wear and tear. In addition, the guide shoes and rails are detachable and easy to replace parts. Once they are worn to a certain extent, they can be replaced. This can greatly improve the overall work efficiency and reliability of equipment operation.

[0055] Regarding the traction connection device 12, one end of the connecting plate 121 is hingedly connected to the machine body via an upper connecting pin 122. The diameter of the pinhole for the upper connecting pin on the connecting plate is larger than that of the upper connecting pin, ensuring that the connecting plate floats relative to the machine body and is protected from forward, backward, and upward forces. The other end of the connecting plate is hingedly connected to one end of a connecting hook 124 via a lower connecting pin 123. The cylindrical structure is provided with connecting slots on both ends. Both the left and right connecting slots are through-slots, opening leftward and rightward, respectively. The cylindrical structure is connected to the traction chain using a chain connecting pin 125 extending through the slot walls and a link of a traction chain 126 positioned within the slot. The traction chain and the connecting hook are connected flexibly. The traction force applied by the traction chain is transmitted to the machine body via the connecting hook and the connecting plate, pulling the shearer leftward and rightward, while the cutting reaction force is not transmitted to the traction chain or the chain slot.

[0056] The chain slot body 231 extends left and right, and the chain slot 2311 extends left and right and is set at the upper part of the chain slot body. The lower part of the chain slot body is provided with front-to-back through-pushing slots 2312, pin hole slots 2313 and leakage material discharge slots 2314 at intervals in the left and right directions. The pushing slot is used to reserve space for setting the pushing seat, the pin hole slot reserves operating space for installing the track pin 222, and the leakage material discharge slot is used as a discharge channel for leakage material.

[0057] The chain trough body is configured as a split structure consisting of a chain trough base and a chain trough removal plate 234. The chain trough removal plate is removably fixed to the upper front portion of the chain trough base, and the two together form a complete chain trough. The chain trough removal plate forms the upper front quarter of the chain trough. The lower front quarter of the chain trough is open, and the connecting hook connects the inner and outer chain troughs through this opening. Removing the chain trough removal plate exposes a notch on the upper front half of the chain trough base, allowing for convenient and direct access to the traction chain, facilitating disassembly and maintenance of the traction chain.

[0058] In addition, the guide and traction system of the short-span thin-seam coal shearer may further include a support shoe 13, which is preferably installed in the middle front portion of the fuselage in the front-to-back direction and supports the fuselage from below. The support shoe is mainly used to support the weight of the fuselage.

[0059] The upper portion of the support shoe is hinged to the fuselage, with the hinge axis extending forward and backward. In this embodiment, the upper portion of the support shoe is provided with a double-eared seat 131. A corresponding position on the lower portion of the fuselage is typically provided with a hinge seat. The seat hole of the hinge seat extends forward and backward, and the support shoe is hinged to the hinge seat via a pin.

[0060] The bottom of the support shoe is equipped with two supporting surfaces, one in front and one in the back: the second supporting surface and the first supporting surface. During use, the first supporting surface rests on the scraper conveyor's blade, while the second supporting surface rests on the floor of the coal mining face. Compared to existing support shoes with a single supporting surface for resting on the blade, this design not only increases the contact area, reduces the specific pressure, and extends the life of the support shoe, but also significantly improves the stability of thin-seam shearers using a suspended body, as the second supporting surface effectively shifts the support position toward the coal wall.

[0061] In order to adapt to the height difference between the shovel plate and the bottom plate, the first support surface is higher than the second support surface. The first support surface and the second support surface are respectively provided with a first wear-resistant layer 134 and a second wear-resistant layer 135.

[0062] On a set of coal shearer, a set of guide sliding shoes 111 and a set of support sliding shoes 13 are arranged on the left and right sides, so that the stability of the coal shearer can be better guaranteed.

[0063] A pusher seat 212 is also fixed to the rear of the chute, providing a connection for the pusher mechanism behind the chute. The pusher seat comprises a main pusher seat 2121, a secondary pusher seat 2122, and a sealing plate 2123. Two secondary pusher seats are located on either side of the main pusher seat. The main pusher seat and secondary pusher seats form the main structure of the pusher seat, providing strength for movement. The sealing plate covers the main pusher seat to prevent coal dust from leaking. The front end of the pusher seat extends forward through the pusher slot, contacting the rear side of the chute.

[0064] A cable trough 241 is also fixed to the rear of the chain trough body to provide a channel for accommodating the shearer cable during the left-right movement of the shearer. The cable trough is fixed to the chain trough body by a cable trough fastener 242.

[0065] The chute is composed of multiple sections connected left and right, and the sections are connected to each other at the front and rear by the front connection group 25 and the rear connection group 26 respectively. Taking the rear connection group as an example, the rear connection group includes a rear connection pin 261, a stop pin 262 and a cover plate 263. The rear connection pin is a dumbbell pin, and its two ends are respectively arranged in the rear connection groove 214 located at the ends of the two chute sections close to each other, and the rear connection pin is prevented from falling off from the rear by a vertical stop pin 262 fixed on the chute and located behind the rear connection pin. The front connection group 25 and the rear connection group 26 not only connect the two adjacent chute sections but also limit the horizontal and vertical bending between the two chute sections, so that the trough body of the scraper conveyor has adaptability to the horizontal bending and vertical bending of complex geological conditions, and it is also convenient for the disassembly and replacement of the trough body.

[0066] The front and back directions referred to in this article correspond to Figure 1 left and right directions.

Claims

1. A guide and traction system for a short-span, thin-seam coal shearer, characterized by: The invention comprises a guide device, a traction connection device and a scraper conveyor, wherein the guide device and the traction connection device are independent of each other, the guide device comprises a guide shoe and a track, the track is laid in a straight line in the left and right directions, the guide shoe is detachably mounted on the rear part of the coal mining machine body and supports the body from below, the guide shoe straddles the track through its guide groove and is connected to the track for sliding left and right, the upper part of the guide shoe is hinged to the body by passing a swivel pin, the hinge axis extends forward and backward, a gap is left between the guide shoe and the body in the up and down and front and back directions, and the pin hole for passing the swivel pin on the guide shoe is larger in left and right width than in top and bottom width Waist-shaped hole, the front side and the rear side of the guide shoe are both smooth transition surfaces with the middle part close to the outside and the left and right ends close to the inside, the traction connection device includes a connecting plate, a connecting hook, a chain trough body and a traction chain, one end of the connecting plate is hinged to the fuselage, and the other end of the connecting plate is hinged to one end of the connecting hook, and the hinge axes of these two hinges are extended left and right. The other end of the connecting hook is set as a cylindrical structure with an axis extending left and right, and the cylindrical structure is set in the chain groove on the chain trough body and is slidably connected to the chain trough body. The traction chain is connected to the cylindrical structure, and the track and the chain trough body can be detachably installed on the trough body of the scraper conveyor.

2. The guiding and traction system of the short-span thin-seam coal shearer according to claim 1, characterized in that: One end of the connecting plate is hinged to the fuselage by passing an upper connecting pin, and the diameter of the pin hole on the connecting plate for passing the upper connecting pin is larger than the upper connecting pin.

3. The guiding and traction system of the short-span thin-seam coal shearer according to claim 2, characterized in that: The track is composed of a plurality of track units arranged in a straight line end to end in the left and right directions. The track unit is door-shaped, including a guide plate and a left connecting plate and a right connecting plate fixed to the left and right ends of the guide plate and supporting the guide plate. A plurality of track seats are fixed on the rear side of the chute of the scraper conveyor, and each track seat is arranged at intervals in the left and right directions. The middle part of the track seat is provided with a track slot that passes through the upper and lower parts for the left connecting plate and / or the right connecting plate to be plugged in. The right connecting plate of the left track unit and the left connecting plate of the right track unit of the two adjacent track units are inserted into the same track slot. The left connecting plate and the right connecting plate are gap-matched with the track slot in the front-to-back direction. The gaps between the left connecting plate and the right connecting plate and between each of them and the track slot are all pre-compressed and filled with high elastic body. The left connecting plate and the right connecting plate are each limited by a track pin passed through the front-to-back direction between the left connecting plate and the right connecting plate and the track pin. The track seat and the track pin are limited by a pin passed through the vertical direction. The chain slot body is fixed to the rear side of the track seat. The two are in contact with each other front and back, and the contact surface is positioned by a positioning pin.

4. The guiding and traction system of the short-span thin-seam coal shearer according to claim 3, characterized in that: The track seat is provided with a track pin hole that passes through the front and back. The track pin hole is a waist-shaped hole with a left and right width greater than the upper and lower widths. The left connecting plate and the right connecting plate are both provided with positioning pin holes. The positioning pin holes are round holes or waist-shaped holes. The track pin cooperates with the track pin hole and the positioning pin hole at the same time.

5. The guiding and traction system of the short-span thin-seam coal shearer according to claim 4, characterized in that: The chain trough body extends left and right, and the chain groove is arranged on the upper part of the chain trough body. The lower part of the chain trough body is provided with front-to-back through-pushing grooves, pin hole grooves and leakage material discharge grooves at intervals in the left and right directions.

6. The guiding and traction system of the short-span thin-seam coal shearer according to claim 5, characterized in that: The chain slot body is configured as a split structure of a chain slot base and a chain slot disassembly plate. The chain slot disassembly plate is detachably fixed to the front upper part of the chain slot base, and the two form a complete chain slot, wherein the chain slot disassembly plate is used to form the front upper quarter boundary of the chain slot, and the front lower quarter of the chain slot is open.

7. The guiding and traction system of a short-span thin-seam coal shearer according to claim 5, characterized in that: A pushing seat is also fixed at the rear of the chute of the scraper conveyor. The pushing seat includes a pushing seat main plate, a pushing seat sub-plate and a pushing seat sealing plate. The pushing seat sub-plate is arranged on each of the left and right sides of the pushing seat main plate. The pushing seat sealing plate covers the top of the pushing seat main plate. The front end of the pushing seat passes forward through the pushing groove and contacts the rear side of the chute.

8. The guiding and traction system of a short-span thin-seam coal shearer according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that: A supporting shoe is also provided, which is installed in the middle front part of the fuselage in the front-to-back direction and supports the fuselage from below. The upper part of the supporting shoe is hinged to the fuselage, and the hinge axis extends forward and backward. The bottom of the supporting shoe is provided with two supporting surfaces, one in front and one in the back, which are the second supporting surface and the first supporting surface respectively.

9. The guiding and traction system of a short-span thin-seam coal shearer according to claim 8, characterized in that: The first supporting surface is higher than the second supporting surface, and both the first supporting surface and the second supporting surface are provided with a wear-resistant layer.

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