Scraper machine driving chain wheel, driving assembly and scraper machine

Abstract

The utility model discloses a scraper drive sprocket, a drive assembly and a scraper, and belongs to the technical field of scrapers. The scraper machine driving chain wheel comprises a chain wheel body. A connecting hole used for being connected with a driving shaft is formed in the chain wheel body along the central axis of the chain wheel body, bearing tables are arranged on the outer circumferential face of the chain wheel body at equal intervals, and containing parts used for applying force to the first chain link and / or the chain shackle and avoiding areas used for avoiding the second chain link are formed on the bearing tables. The containing part is provided with a straight bearing face, the periphery of the straight bearing face extends to form a first concave arc face, the first chain links and / or the chain buckles make contact with the straight bearing face, the first concave arc face limits the first chain links and / or the chain buckles, and therefore the first chain links and / or the chain buckles can be prevented from being disengaged. And longitudinal thrust is provided for the first chain links and / or the chain shackles.

Description

Technical Field

[0001] This utility model belongs to the field of scraper technology, and more specifically, it relates to a scraper drive sprocket, drive assembly and scraper, which can be applied to a variety of scenarios and is also suitable for narrow installation spaces of no more than 350mm. Background Technology

[0002] Scraper conveyor series products are widely used in metallurgy, building materials, power, chemical, cement, port, dock, coal, mining, grain and oil, food, feed and other industries and departments. A scraper conveyor is a continuous conveying device that transports bulk materials within a closed rectangular cross-section shell by means of a moving scraper chain. This machine has a simple structure, good sealing performance, convenient installation and maintenance, and flexible process layout; it can convey materials horizontally, as well as inclined or vertically; it can be used as a single unit or in combination; and it can have multiple feeding and unloading points.

[0003] The current scraper conveyor structure includes a frame, a drive assembly, a tensioning assembly, and a scraper assembly mounted on the frame. The drive assembly includes a geared motor, a circular link chain, a drive sprocket, and a driven sprocket. The drive sprocket has a groove to accommodate the circular link chain. However, both the circular link chain and the drive sprocket are made of metal. At the moment of startup, due to the large starting load, the circular link chain will impact the drive sprocket. In addition, dust particles adhering to the circular link chain will cause impact wear on the groove of the drive sprocket. Summary of the Invention

[0004] 1. The problem to be solved

[0005] In view of the technical problems existing in the prior art, this utility model provides a scraper conveyor drive sprocket, which can reduce the impact wear at the moment of start-up and extend the service life of the drive sprocket.

[0006] Another objective of this invention is to provide a drive assembly with a scraper conveyor drive sprocket.

[0007] Another objective of this invention is to provide a scraper conveyor with a drive assembly.

[0008] 2. Technical Solution

[0009] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0010] The first aspect of this utility model provides a drive sprocket for a scraper conveyor, which is used to drive a circular chain that drives the scraper to move. The circular chain includes a first link, a second link, and a chain buckle connecting the scraper. The chain buckle and the first link are arranged horizontally, and the second link is arranged vertically. The second link is sleeved with the chain buckle and the first link.

[0011] The scraper conveyor drive sprocket includes a sprocket body; the sprocket body has a connection hole for connecting to the drive shaft along its central axis, and a support platform is provided at equal intervals on the outer circumferential surface of the sprocket body. The support platform has a receiving part for applying force to the first chain link and / or chain buckle, and a clearance area for avoiding the second chain link.

[0012] The receiving portion has a flat bearing surface, and a first concave arc surface extends around the flat bearing surface. The first link and / or the chain buckle contacts the flat bearing surface. The first concave arc surface limits the first link and / or the chain buckle, preventing the first link and / or the chain buckle from derailing and providing longitudinal thrust to the first link and / or the chain buckle. At the same time, the first concave arc surface provides a sliding arc surface for the first link and / or the second link and / or the chain buckle loaded on the drive sprocket, avoiding wear or impact damage to the receiving portion caused by the first link and / or the second link and / or the chain buckle due to impact force.

[0013] Considering the inherent rigidity of the circular link chain, the starting load will reach its maximum at the moment of startup. The circular link chain is subjected to lateral scraper tension and longitudinal sprocket tension. At the same time, the tightness of the fit between the circular link chain and the drive sprocket must also be considered. This utility model adopts a first concave arc surface extending around the flat bearing surface to provide a sliding arc surface for the first link and / or second link and / or chain buckle loaded on the drive sprocket. This avoids the first link and / or second link and / or chain buckle from being worn or damaged by impact due to impact force on the receiving part, effectively reducing the impact wear at the moment of startup and extending the service life of the drive sprocket.

[0014] According to any embodiment of the first aspect of the present invention, a second concave arc surface with a smooth transition is formed on the first concave arc surface, and the second concave arc surface is disposed near the scraper side; the radius of curvature of the second concave arc surface is smaller than the radius of curvature of the first concave arc surface. In use, the two ends of the scraper are connected to chain buckles, and the chain buckles are sleeved with the second chain links.

[0015] At the moment of startup, due to the rotation of two drive sprockets driven by a single drive shaft, a displacement difference exists between the two circular chains on the drive sprockets. This causes the circular chain furthest from the power source to be subjected to lateral tension from the scraper and longitudinal tension from the drive sprockets. The circular chain will then deflect within the receiving section, leading to wear on the sidewall of the receiving section near the scraper. By providing a second concave arc surface, a buffer surface can be provided for the first chain link and / or chain buckle.

[0016] This invention is suitable for materials with a certain moisture content and for cleaning sites with angles. Through extensive field use, it has been found that when the scraper carries some mud, as the scraper rotates with the drive sprocket and moves from the bottom to the top, the second concave arc surface and the first concave arc surface can collect and guide some of the mud to the avoidance area, and then discharge it after it is collected in the avoidance area, thus preventing the mud from falling onto the connection between the drive shaft and the sprocket body, effectively ensuring the stability of the connection between the drive shaft and the sprocket body.

[0017] According to any embodiment of the first aspect of the present invention, the avoidance area is located in the middle of the receiving portion, and its bottom is arc-shaped (adapted to the shape of the second link). The avoidance area is close to the connecting hole, and the bottom of the avoidance area is located on a circle centered on the center of the sprocket body. The aforementioned avoidance area effectively avoids the problem of the circular link chain derailing and ensures that the circular link chain does not deviate from its intended path.

[0018] According to any embodiment of the first aspect of the present invention, the sprocket body can extend to one side to form a connecting boss, the connecting hole extends to the end face of the connecting boss, and at least one positioning hole is provided on the outer peripheral surface of the connecting boss, the positioning hole is connected and communicates with the connecting hole, and the positioning hole is equipped with a positioning pin or a positioning bolt.

[0019] By extending the length of the sprocket body, the contact area between the drive shaft and the drive sprocket is increased. With the help of locating pins or locating bolts, the fixation between the drive shaft and the drive sprocket is more secure. In addition, the connecting boss keeps the connection end between the drive shaft and the sprocket body away from the plane where the chain buckle is located, further preventing mud from falling onto the connection between the drive shaft and the sprocket body, effectively ensuring the stability of the connection between the drive shaft and the sprocket body.

[0020] According to any embodiment of the first aspect of the present invention, the outer contour cross-sectional shape of the connecting boss is circular, square, pentagonal, or hexagonal, etc.

[0021] The second aspect of this utility model provides a scraper conveyor drive assembly, including a power source, a circular chain, a drive sprocket, and a driven sprocket; the power source is located on the outside of the head frame and drives the drive shaft; the drive sprocket is connected to the drive shaft, and the driven sprocket is connected to the driven shaft; the circular chain is wound around the drive sprocket and the driven sprocket; the drive sprocket is the drive sprocket described in the first aspect; the power source includes, but is not limited to, a geared motor, a hydraulic motor, a geared motor-universal coupling, etc.

[0022] According to any embodiment of the second aspect of the present invention, the driven sprocket is provided with an annular groove for engaging the second link, the annular groove enabling the second link to be inserted into the annular groove during transmission of the circular chain, thereby preventing the circular chain from slipping off or jumping.

[0023] The third aspect of this utility model provides a scraper conveyor, comprising:

[0024] The frame includes a head frame, a middle frame, and a tail frame; one end of the head frame is connected to the middle frame, and a drive shaft seat is provided in the head frame, in which a drive shaft is installed; the tail frame is connected to the end of the middle frame away from the head frame, and a driven shaft seat is provided in the tail frame, in which a driven shaft is installed.

[0025] The drive assembly mounted on the frame provides power for the scraper conveyor's operation. It includes a power source, a circular chain, a drive sprocket, and a driven sprocket. The power source is located on the outside of the head frame and drives the drive shaft. The drive sprocket is connected to the drive shaft, and the driven sprocket is connected to the driven shaft. The circular chain is wound around the drive sprocket and the driven sprocket. The power source includes, but is not limited to, a geared motor, a hydraulic motor, or a geared motor-universal coupling.

[0026] 3. Beneficial effects

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] (1) The scraper conveyor drive sprocket of this utility model extends around the flat bearing surface to form a first concave arc surface, which provides a sliding arc surface for the first link and / or the second link and / or the chain buckle loaded on the drive sprocket, avoiding wear or impact damage to the receiving part caused by the first link and / or the second link and / or the chain buckle due to impact force, effectively reducing the impact wear at the moment of start-up and extending the service life of the drive sprocket;

[0029] (2) In the moment of startup, the drive sprocket of the scraper conveyor of this utility model causes two drive sprockets to rotate due to the drive shaft. The two circular chains have a displacement difference on the drive sprockets, which causes the circular chain away from the power source end to be subjected to the lateral tension of the scraper and the longitudinal tension of the drive sprocket. The circular chain will be deflected in the receiving part, which will wear the side wall of the receiving part near the scraper. By setting the second concave arc surface, a buffer surface can be provided for the first chain link and / or chain buckle. Attached Figure Description

[0030] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of this utility model. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural construction described herein and are not necessarily drawn to scale.

[0031] Figure 1 This is a top view of the drive sprocket of the scraper conveyor of this utility model;

[0032] Figure 2 This is a side view of the drive sprocket of the scraper conveyor of this utility model;

[0033] Figure 3 for Figure 2 Sectional view along line AA;

[0034] Figure 4 for Figure 3 Enlarged view of part B;

[0035] Figure 5 This is a schematic diagram of the scraper conveyor of this utility model;

[0036] Figure 6 This is a partial structural schematic diagram of the drive component of this utility model;

[0037] Figure 7 for Figure 6 Enlarged view of part C;

[0038] Figure 8 This is an assembly diagram of the circular link chain and drive sprocket of this utility model;

[0039] Figure 9 This is a schematic diagram of the scraper assembly of this utility model;

[0040] Figure 10 This is a diagram showing the usage state of the scraper conveyor of this utility model.

[0041] Explanation of reference numerals in the attached figures:

[0042] 10. Frame; 11. Head frame; 12. Middle frame; 13. Tail frame; 14. Drive shaft mount; 15. Drive shaft; 16. Driven shaft mount; 17. Driven shaft;

[0043] 20. Drive assembly; 21. Gear motor; 22. Circular link chain; 221. First link; 222. Second link; 223. Chain buckle; 23. Drive sprocket; 231. Sprocket body; 232. Connecting hole; 233. Support platform; 234. Receiving part; 235. Clearance area; 236. Flat support surface; 237. First concave arc surface; 238. Second concave arc surface; 239. Connecting boss; 2310. Positioning hole; 24. Driven sprocket;

[0044] 30. Tensioning assembly; 31. Lead screw; 32. Nut adjusting seat;

[0045] 40. Scraper assembly; 41. Arch-breaking scraper; 42. Flat scraper. Detailed Implementation

[0046] The following detailed description of exemplary embodiments of the present invention refers to the accompanying drawings, which form part of the description, illustrating exemplary embodiments in which the present invention may be implemented. Although these exemplary embodiments have been described in sufficient detail to enable those skilled in the art to implement the present invention, it should be understood that other embodiments may be implemented and various changes may be made to the present invention without departing from the spirit and scope thereof. The more detailed description of embodiments of the present invention below is not intended to limit the scope of the claimed invention, but is merely illustrative and does not limit the description of the features and characteristics of the invention, in order to suggest the best mode for carrying out the invention and sufficient to enable those skilled in the art to implement it. Therefore, the scope of the present invention is defined only by the appended claims.

[0047] The following detailed description and exemplary embodiments of the present invention can be better understood in conjunction with the accompanying drawings, wherein the elements and features of the present invention are identified by reference numerals.

[0048] like Figures 1 to 10 As shown, the scraper conveyor of this embodiment includes a frame 10, a drive assembly 20, a tensioning assembly 30 and a scraper assembly 40 disposed on the frame 10.

[0049] Among them, Figure 5 In the assembly, the frame 10 includes a head frame 11, a middle frame 12, and a tail frame 13; the head frame 11 is connected to one end of the middle frame 12, and a drive shaft seat 14 is provided in the head frame 11, with a drive shaft 15 installed inside the drive shaft seat 14; the tail assembly includes a tail frame 13, which is connected to the end of the middle frame 12 away from the head frame 11, and a driven shaft seat 16 is provided in the tail frame 13, with a driven shaft 17 installed inside the driven shaft seat 16.

[0050] In some embodiments of this utility model, the central frame 12 is a rectangular frame structure with a guide plate on it. A guide groove is provided in the middle of the guide plate, and the guide groove contacts the second link 222 of the circular link chain 22. The guide plate supports the circular link chain 22, preventing it from sinking and avoiding vibration during operation. Multiple central frames 12 can be assembled and used to change the overall length of the scraper conveyor, thereby increasing its conveying distance.

[0051] The aforementioned guide plate can also be a multi-point guide wheel, which supports the circular chain 22.

[0052] Combination Figure 5 and Figure 6 As shown in the figure, this embodiment provides a structure in which the drive assembly 20 provides power for the operation of the scraper conveyor. It includes a geared motor 21, two circular chain 22, two drive sprockets 23, and two driven sprockets 24. The geared motor 21 is located on the outside of the head frame 11 and drives the drive shaft 15. The drive sprockets 23 are connected to the drive shaft 15, and the driven sprockets 24 are connected to the driven shaft 17. The circular chain 22 is wound around the drive sprockets 23 and the driven sprockets 24. The circular chain 22 has high strength and good wear resistance.

[0053] In this embodiment, as Figure 5 As shown, the tensioning assembly 30, which is located at the end of the head frame 11 and connected to the drive shaft seat 14, includes a lead screw 31 and a nut adjusting seat 32. The lead screw 31 extends from the end of the head frame 11 into the head frame 11 and is connected to the drive shaft seat 14. The nut adjusting seat 32 is located on the outside of the head frame 11 and is connected to the lead screw 31.

[0054] Furthermore, the positions of the drive shaft 15 and the drive assembly 20 can be adjusted relative to each other. The circular chain 22 is installed during assembly and its tension is adjusted during use. The drive shaft seat 14 can be easily adjusted through the tensioning assembly 30, and the tension of the circular chain 22 can be adjusted as needed to ensure normal operation of the equipment and improve material conveying efficiency.

[0055] In this embodiment, as Figure 9 As shown, the scraper assembly 40 includes at least one scraper and a chain buckle 223 that cooperates with the scraper; both ends of the scraper are connected to a circular chain 22 via the chain buckle 223; the scraper includes an arch-breaking scraper 41 and / or a flat scraper 42.

[0056] Wherein: 1) The arch-breaking scraper 41 includes a front scraper and a rear scraper, both of which have teeth at their bottoms. A reinforcing plate is inserted between the two ends of the front and rear scrapers, and the outside of the reinforcing plate is fixed to the chain buckle 223 by bolts; 2) The flat scraper 42 includes a scraper body and a toothless scraper. Both ends of the scraper body are welded with joints, and the two sides of the joints are connected to the chain buckle 223. The bottom of the scraper body is connected to the toothless scraper. The scraper body includes a front reinforcing plate, a rear reinforcing plate, and a middle plate. The middle plate is welded in the middle of the front and rear reinforcing plates, and the front, rear, and middle plates form an "H" shape.

[0057] The aforementioned arch-breaking scraper 41 and flat scraper 42 can be used individually or in combination. When used in combination, the teeth of the front and rear scrapers are staggered. During movement, the arch-breaking scraper 41 first breaks up the material pile, dispersing the accumulated material. The staggered arrangement of the double-row staggered teeth avoids limitations in arch breaking and maximizes the crushing of the accumulated material. The bottom of the teeth is flush with the bottom of the toothless scraper. Combined with the movement of the toothless scraper, the remaining material can be scraped clean, avoiding the floating chain problem caused by accumulation.

[0058] like Figures 1 to 5 As shown, in this embodiment, the scraper conveyor drive sprocket 23 is used to drive the circular chain 22 that drives the scraper to move. The circular chain 22 includes a first link 221 (also called a horizontal chain), a second link 222 (also called a vertical chain), and a chain buckle 223 that connects to the scraper. The chain buckle 223 and the first link 221 are arranged horizontally, and the second link 222 is arranged vertically. The second link 222 is sleeved with the chain buckle 223 and the first link 221. The first link 221 and the second link 222 are arranged with equal pitch.

[0059] In this embodiment, the scraper conveyor drive sprocket 23 includes a sprocket body 231. The sprocket body 231 has a connection hole 323 for connecting to the drive shaft along its central axis. Six support platforms 233 are provided at equal intervals on the outer circumferential surface of the sprocket body 231. The support platforms 233 have a receiving portion 234 for applying force to the first chain link 221 and / or the chain buckle 223, and a clearance area 235 for avoiding the second chain link 222. When the circular chain 22 is matched with the drive sprocket 23, the clearance area 235 can provide effective clearance space for the second chain link 222, avoiding the chain derailment caused by the circular chain 22 being lifted.

[0060] The aforementioned scraper conveyor drive sprocket 23 structure occupies a small space, thus it can be used in narrow installation spaces not exceeding 350mm.

[0061] exist Figure 2 , Figure 7 and Figure 8As shown, the receiving portion 234 has a flat bearing surface 236, and a first concave arc surface 237 extends around the flat bearing surface 236. The first link 221 and / or the chain buckle 223 are in contact with the flat bearing surface 236. The first concave arc surface 237 limits the first link 221 and / or the chain buckle 223 and provides lateral and longitudinal thrust to prevent the first link 221 and / or the chain buckle 223 from derailing. At the same time, the first concave arc surface 237 provides a sliding arc surface for the first link 221 and / or the second link 222 and / or the chain buckle 223 loaded on the drive sprocket 23, avoiding wear or impact damage to the receiving portion 234 caused by the first link 221 and / or the second link 222 and / or the chain buckle 223 due to impact force.

[0062] Considering the high rigidity of the circular chain 22, the starting load will reach its maximum at the moment of startup. At the same time, the tightness of the fit between the circular chain 22 and the drive sprocket 23 also needs to be considered. In this embodiment, a first concave arc surface 237 is formed by extending around the flat bearing surface 236, which effectively reduces the impact wear at the moment of startup and extends the service life of the drive sprocket 23.

[0063] like Figure 8 As shown, a second concave arc surface 238 is formed on the first concave arc surface 237, and the second concave arc surface 238 is located close to the scraper. The second concave arc surface 238 extends downward and can be flush with the end face of the flat bearing surface 236. The radius of curvature of the second concave arc surface 238 is smaller than that of the first concave arc surface 237, and the difference between the radius of curvature of the second concave arc surface 238 and the radius of curvature of the first concave arc surface 237 is 2-3mm. This not only facilitates the processing of the concave arc surface, but also, for example, the radius of curvature of the second concave arc surface 238 is 9mm, and the radius of curvature of the first concave arc surface 237 is 12mm. In use, the two ends of the scraper are connected to chain links 223, and the chain links 223 are sleeved with the second chain links 222.

[0064] At the moment of startup, due to the rotation of two drive sprockets 23 driven by a drive shaft 15, there is a displacement difference between the two circular chains 22 on the drive sprockets 23. This causes the circular chain 22 away from the power source end to be subjected to the lateral tension of the scraper and the longitudinal tension of the drive sprocket 23. The circular chain 22 will deflect in the receiving part 234, thereby wearing down the side wall of the receiving part 234 near the scraper. By providing a second concave arc surface 238, a buffer surface can be provided for the first link 221 and / or the chain buckle 223.

[0065] This invention is suitable for cleaning materials with a certain moisture content and at angled cleaning sites. Extensive field use has revealed that when the scraper carries some mud, as the scraper rotates with the drive sprocket 23, as... Figure 10As shown, as it moves from the bottom to the top, the second concave arc surface 238 and the first concave arc surface 237 can collect and guide part of the mud to the avoidance area 235, so that it can be discharged after being collected in the avoidance area 235, thus preventing the mud from falling into the connection between the drive shaft 15 and the sprocket body 231 (during long-term use, the mud will enter the gap, causing increased wear), effectively ensuring the stability of the connection between the drive shaft 15 and the sprocket body 231.

[0066] To effectively prevent the circular link chain 22 from derailing and to ensure that the circular link chain 22 does not deviate from its intended path, such as... Figure 3 and Figure 4 As shown, the avoidance area 235 is located in the middle of the receiving part 234, and the bottom is arc-shaped (matching the shape of the second link 222). The avoidance area 235 is close to the connecting hole 323, and the bottom of the avoidance area 235 is located on a circle with the center of the sprocket body 231 as the center.

[0067] exist Figure 1 and Figure 3 In the process, the sprocket body 231 can extend to one side to form a connecting boss 239, and the outer contour cross-section of the connecting boss 239 is circular; the connecting hole 323 extends to the end face of the connecting boss 239, and two positioning holes 2310 are provided on the outer peripheral surface of the connecting boss 239. The positioning holes 2310 are connected and communicate with the connecting hole 323, and the positioning holes 2310 are equipped with positioning pins or positioning bolts.

[0068] By extending the length of the sprocket body 231, the contact area between the drive shaft 15 and the drive sprocket 23 is increased. With the help of positioning pins or positioning bolts, the fixation between the drive shaft 15 and the drive sprocket 23 is more secure. In addition, the connecting boss 239 keeps the connection end between the drive shaft 15 and the sprocket body 231 away from the plane where the chain buckle 223 is located, further preventing mud from falling onto the connection between the drive shaft 15 and the sprocket body 231, effectively ensuring the stability of the connection between the drive shaft 15 and the sprocket body 231.

[0069] The scraper conveyor drive assembly 20 of this embodiment includes a geared motor 21, a circular chain 22, a drive sprocket 23, and a driven sprocket 24. The geared motor 21 is located on the outside of the head frame 11 and drives the drive shaft 15. The drive sprocket 23 is connected to the drive shaft 15, and the driven sprocket 24 is connected to the driven shaft 17. The circular chain 22 is wound around the drive sprocket 23 and the driven sprocket 24. The drive sprocket 23 is the same as described above.

[0070] Furthermore, the driven sprocket 24 is provided with an annular groove for engaging the second link 222. The annular groove ensures that the second link 222 is always inserted into the annular groove during the transmission process, thus preventing the annular chain 22 from derailing or skipping.

[0071] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A scraper conveyor drive sprocket (23) for driving a circular chain (22) that drives a scraper, the circular chain (22) comprising a first link (221), a second link (222), and a chain buckle (223) for connecting the scraper; The scraper conveyor drive sprocket (23) includes a sprocket body (231); the sprocket body (231) has a connecting hole (232) for connecting to the drive shaft along its central axis, and a support platform (233) is provided at equal intervals on the outer circumferential surface of the sprocket body (231). The support platform (233) has a receiving portion (234) for applying force to the first link (221) and / or the chain buckle (223), and a clearance area (235) for avoiding the second link (222); characterized in that: The receiving portion (234) has a flat bearing surface (236), and a first concave arc surface (237) extends around the flat bearing surface (236). The first link (221) and / or the buckle (223) are in contact with the flat bearing surface (236). The first concave arc surface (237) limits the first link (221) and / or the buckle (223), and provides thrust to the first link (221) and the buckle (223).

2. The scraper conveyor drive sprocket (23) according to claim 1, characterized in that: A second concave arc surface (238) with a smooth transition is formed on the first concave arc surface (237), and the second concave arc surface (238) is disposed near the scraper side; the radius of curvature of the second concave arc surface (238) is smaller than the radius of curvature of the first concave arc surface (237).

3. The scraper conveyor drive sprocket (23) according to claim 2, characterized in that: The clearance area (235) is located in the middle of the receiving part (234) and has an arc-shaped bottom. The clearance area (235) is close to the connecting hole (232), and the bottom of the clearance area (235) is located on a circle with the center of the sprocket body (231) as the center.

4. The scraper conveyor drive sprocket (23) according to claim 3, characterized in that: The sprocket body (231) can extend to one side to form a connecting boss (239), the connecting hole (232) extends to the end face of the connecting boss (239), and at least one positioning hole (2310) is provided on the outer peripheral surface of the connecting boss (239), the positioning hole (2310) is connected and communicates with the connecting hole (232).

5. The scraper conveyor drive sprocket (23) according to claim 4, characterized in that: The outer contour cross-sectional shape of the connecting boss (239) is circular, square, pentagonal or hexagonal.

6. A scraper conveyor drive assembly (20), comprising a power source, a circular chain (22), a drive sprocket (23), and a driven sprocket (24); the power source is disposed on the outside of the head frame (11), and the power source drives the drive shaft (15); the drive sprocket (23) is connected to the drive shaft (15), and the driven sprocket (24) is connected to the driven shaft (17); the circular chain (22) is wound around the drive sprocket (23) and the driven sprocket (24); characterized in that: The drive sprocket (23) is the drive sprocket (23) as described in any one of claims 1-5.

7. The scraper conveyor drive assembly (20) according to claim 6, characterized in that: The driven sprocket (24) is provided with an annular groove for the engagement of the second link (222), the annular groove allowing the second link (222) to be inserted into the annular groove during the transmission of the circular chain (22).

8. A scraper conveyor, comprising: A frame (10) includes a head frame (11), a middle frame (12), and a tail frame (13); the head frame (11) is connected to one end of the middle frame (12), and a drive shaft seat (14) is provided in the head frame (11), and a drive shaft (15) is installed in the drive shaft seat (14); the tail frame (13) is connected to one end of the middle frame (12) away from the head frame (11), and a driven shaft seat (16) is provided in the tail frame (13), and a driven shaft (17) is installed in the driven shaft seat (16); The drive assembly (20) mounted on the frame (10) provides power for the operation of the scraper conveyor, characterized in that: the drive assembly (20) is the drive assembly (20) as described in any one of claims 6-7.

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