A sprocket assembly for a coal mine scraper conveyor

Abstract

The present application belongs to the technical field of chain wheel assembly, and particularly relates to a chain wheel assembly of a coal mine scraper conveyor, which comprises a chain wheel shaft, a chain wheel cylinder and a chain wheel. The chain wheel cylinder is rotationally connected with the chain wheel shaft, and the chain wheel is provided with two and arranged on the chain wheel shaft. The chain wheel comprises an upper half chain wheel and a lower half chain wheel, and the upper half chain wheel and the lower half chain wheel are both provided with key grooves, and the chain wheel cylinder is fixedly connected with corresponding connecting keys. The chain wheel cylinder is provided with a fixed blocking ring and a movable blocking ring. The fixed blocking ring is fixedly connected with the chain wheel cylinder, and the movable blocking ring is slidingly connected with the chain wheel cylinder. The fixed blocking ring is provided with at least two supporting columns, and the upper half chain wheel and the lower half chain wheel are both provided with connecting holes corresponding to the supporting columns. The chain wheel is located between the fixed blocking ring and the movable blocking ring. The clamping mechanism of the fixed blocking ring, the movable blocking ring and the hydraulic supporting pin replaces the traditional bolt connection fixing mode.

Description

Technical Field

[0001] This invention belongs to the field of sprocket assembly technology, and specifically relates to a sprocket assembly for a coal mine scraper conveyor. Background Technology

[0002] Scraper conveyors are critical transportation equipment in fully mechanized coal mining faces. Their sprocket assemblies, as the core components of the drive chain, endure enormous static, pulsating, and impact loads over long periods, leading to severe wear at the chain engagement points. Sprocket failure directly impacts the conveyor's operating efficiency and safety; therefore, sprocket replacement and maintenance are crucial aspects of underground equipment management. Currently, sprocket assemblies are primarily replaced in two ways: as a whole or in parts. Integral sprocket replacement is costly and has low material utilization; while parts-based sprockets, although improved, still have significant drawbacks in practical applications.

[0003] For example, Chinese utility model patent CN213386248U proposes a split sprocket consisting of an upper and lower sprocket body, secured by a locking ring and spacers. While this solution avoids complete replacement to some extent, the sprocket body's closure and fixation rely on the threaded connection of the locking ring and the screw tightening of the spacers, requiring the removal of multiple bolts during assembly and disassembly. More importantly, installing and removing the two sprocket halves requires manual labor or tools for positioning, increasing worker workload, posing safety hazards, and making operation extremely inconvenient. Therefore, existing technologies still suffer from cumbersome sprocket assembly and disassembly processes, low efficiency, and heavy reliance on manual support, necessitating a more efficient and safer sprocket assembly solution. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention provides a sprocket assembly for a coal mine scraper conveyor, which allows for easy disassembly of the sprocket.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A sprocket assembly for a coal mine scraper conveyor includes a sprocket shaft, a sprocket barrel, and sprockets. The sprocket barrel is rotatably connected to the sprocket shaft, and two sprockets are provided and mounted on the sprocket shaft. Each sprocket includes an upper sprocket and a lower sprocket, both of which are provided with keyways. A corresponding connecting key is fixedly connected to the sprocket barrel.

[0007] The sprocket cylinder is provided with a fixed retaining ring and a movable retaining ring. The fixed retaining ring is fixedly connected to the sprocket cylinder, and the movable retaining ring is slidably connected to the sprocket cylinder. The fixed retaining ring is provided with at least two support columns, and the upper half sprocket and the lower half sprocket are both provided with connection holes corresponding to the support columns.

[0008] The sprocket is located between the fixed retaining ring and the movable retaining ring; both the fixed retaining ring and the movable retaining ring are provided with connecting grooves, and both the upper half sprocket and the lower half sprocket are provided with connecting protrusions corresponding to the connecting grooves;

[0009] The sprocket cylinder is provided with at least two hydraulic support pins in its circumferential direction, and the movable retaining ring is provided with an inclined groove that cooperates with the hydraulic support pins.

[0010] The fixed retaining ring is provided with an oil cavity that is slidably connected to the support column. Each support column is connected to a corresponding oil cavity, and the oil cavities are interconnected. The fixed retaining ring is provided with an oil injection hole, which is connected to any oil cavity.

[0011] Oil is injected into the oil chamber through the oil injection hole, which pushes the support column and the movable retaining ring to move axially.

[0012] The hydraulic support pin includes a cylinder and a pin body. The pin body is slidably connected to the cylinder body, and the cylinder body is fixedly connected to the sprocket cylinder. The sprocket cylinder is fixedly connected to a first oil passage and a second oil passage that communicate with the cylinder body.

[0013] The first oil passages of each hydraulic support pin are connected, and the second oil passages of each hydraulic support pin are connected.

[0014] The end of the pin is conical.

[0015] Both sides of the sprocket shaft are provided with connecting components; the connecting components include a connecting plate, a sliding block and a fixing block; the connecting plate is provided with an opening groove for connecting to the sprocket shaft; the sliding block is slidably connected to the opening groove, and the fixing block is detachably connected to the connecting plate, and the opening of the opening groove is blocked by the fixing block; a limiting component is provided between the connecting plate and the sliding block.

[0016] The fixing block is inserted into the connecting plate, and the fixing block and the connecting plate are connected by bolts.

[0017] The limiting component includes a fixed cam and a fixed handle. The fixed cam is rotatably connected to the connecting plate, and the side of the fixed cam contacts the outer surface of the sliding block. The fixed handle is fixedly connected to the fixed cam, and the fixed handle is connected to the connecting plate by connecting bolts.

[0018] The two connecting components are fixedly connected to each other by a fixed shaft, with both ends of the fixed shaft being fixedly connected to the fixed cams respectively.

[0019] A limiting plate is rotatably connected to the fixed cam, and a limiting post is provided on the fixed cam to cooperate with the limiting plate; the fixed block is inserted into the connecting plate, and connecting posts are spaced apart on the fixed block, with baffles fixedly connected between the connecting posts; the end of the limiting plate is provided with a hook, which can extend into the space between the connecting posts.

[0020] The end of the sprocket shaft is provided with an oil injection hole, which is connected to an oil injection connector. A limit ring is fixedly connected to the oil injection connector, and the limit plate is provided with a groove that matches the oil injection connector. Support plates are fixedly connected to the upper and lower sides of the connecting plate.

[0021] Compared with the prior art, the beneficial effects of this invention are:

[0022] The traditional bolt connection method is replaced by a clamping mechanism consisting of a fixed retaining ring, a movable retaining ring, and a hydraulic support pin. When replacing or changing sprockets, locking and releasing the sprockets can be accomplished simply by operating the extension and retraction of the hydraulic support pin.

[0023] The support posts installed on the fixed retaining ring allow the upper and lower sprocket halves to be stably inserted into the support posts during installation and disassembly, eliminating the need for manual support by workers. This design fundamentally solves the problem of existing two-half sprockets requiring manual support, reducing labor intensity and eliminating the resulting safety risks.

[0024] By injecting hydraulic oil into the oil chamber inside the fixed retaining ring, the support column can be moved axially, thereby assisting the movable retaining ring to disengage. This effectively solves the problem of jamming that may occur in the movable retaining ring due to long-term use, ensuring a smooth and reliable disassembly process without relying on manual force.

[0025] The design of the connecting components on both sides of the sprocket shaft, through the cooperation of sliding blocks, fixed cams and limiting plates, enables the sprocket shaft to be moved and fixed quickly, making it convenient to loosen the chain during maintenance and creating more convenient space conditions for the disassembly and assembly of the sprocket.

[0026] The connection between the key and keyway, and the insertion of the connecting protrusion into the connecting groove, provides multiple circumferential limits for the sprocket, effectively preventing rotation or loosening during operation and enhancing transmission stability and structural strength. Simultaneously, the limit plate structure also secures the oil filling connector, preventing accidental dislodgement. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention in one direction;

[0028] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0029] Figure 3 This is a schematic diagram of the structure of the present invention after the sprocket is removed;

[0030] Figure 4 This is a schematic diagram of the sprocket structure of the present invention;

[0031] Figure 5 This is a partial cross-sectional view of the fixing retaining ring of the present invention;

[0032] Figure 6 This is a schematic diagram of the half-section structure of the present invention;

[0033] Figure 7 yes Figure 6 A magnified view of a section at point B in the middle;

[0034] Figure 8 yes Figure 6 A magnified view of a section at point C;

[0035] Figure 9 This is a schematic diagram of the structure from another direction of the present invention;

[0036] Wherein: 1 is the sprocket shaft, 2 is the sprocket cylinder, 3 is the sprocket, 30 is the upper half sprocket, 31 is the lower half sprocket, 32 is the keyway, 33 is the connecting hole, 34 is the connecting protrusion, 4 is the connecting key, 5 is the fixed retaining ring, 6 is the movable retaining ring, 60 is the inclined groove, 7 is the support column, and 8 is the connecting groove.

[0037] 9 represents the hydraulic support pin, 90 represents the cylinder, 91 represents the pin body, 92 represents the first oil passage, and 93 represents the second oil passage.

[0038] 10 is the oil chamber, 11 is the oil injection hole, 12 is the connecting assembly, 121 is the connecting plate, 122 is the sliding block, 123 is the fixing block, 124 is the opening slot, 125 is the fixing cam, 126 is the fixing handle, 127 is the connecting bolt, 128 is the fixing shaft, 129 is the limiting plate, 1210 is the limiting post, 1211 is the connecting post, 1212 is the baffle, 1213 is the hook part, 1214 is the groove, 13 is the oil injection connector, 14 is the limiting ring, and 15 is the support plate. Detailed Implementation

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] like Figures 1 to 9 As shown, a sprocket assembly for a coal mine scraper conveyor includes a sprocket shaft 1, a sprocket cylinder 2, and sprockets 3. The sprocket cylinder 2 is rotatably connected to the sprocket shaft 1, and two sprockets 3 are provided and mounted on the sprocket shaft 1. Each sprocket 3 has a chain recess on both sides, allowing the unworn part to contact the chain by changing the position of the sprocket 3.

[0041] The sprocket 3 includes an upper sprocket 30 and a lower sprocket 31. Both the upper sprocket 30 and the lower sprocket 31 are provided with keyways 32. A corresponding connecting key 4 is fixedly connected to the sprocket cylinder 2. The connection between the keyway 32 and the connecting key 4 can play a limiting role.

[0042] The sprocket cylinder 2 is equipped with a fixed retaining ring 5 and a movable retaining ring 6. The fixed retaining ring 5 is fixedly connected to the sprocket cylinder 2, and the movable retaining ring 6 is slidably connected to the sprocket cylinder 2. Specifically, the movable retaining ring 6 is also provided with a sliding groove that mates with the connecting key 4. The fixed retaining ring 5 is provided with at least two support posts 7, and both the upper half sprocket 30 and the lower half sprocket 31 have connecting holes 33 corresponding to the support posts 7. During installation and disassembly, the upper half sprocket 30 and the lower half sprocket 31 can be in an inserted state with the support posts 7, which can avoid the need for manual or tool support in the existing two-half sprocket 3.

[0043] The sprocket 3 is located between the fixed retaining ring 5 and the movable retaining ring 6, which can clamp the fixed sprocket 3. Both the fixed retaining ring 5 and the movable retaining ring 6 are provided with connecting grooves 8, and both the upper sprocket 30 and the lower sprocket 31 have connecting protrusions 34 corresponding to the connecting grooves 8. After installation, the connecting protrusions 34 of the sprocket 3 can be inserted into the corresponding connecting grooves 8, further preventing the sprocket 3 from rotating and increasing the connection strength between the sprocket 3 and the fixed retaining ring 5 and the movable retaining ring 6.

[0044] The sprocket cylinder 2 is provided with at least two hydraulic support pins 9 in the circumferential direction, and the movable retaining ring 6 is provided with a groove 60 that cooperates with the hydraulic support pins 9. When the hydraulic support pins 9 are extended, they contact the groove 60, pushing the movable retaining ring 6 to move towards the fixed retaining ring 5, thereby clamping the sprocket 3 and fixing the sprocket 3.

[0045] When sprocket 3 is worn and needs to be repositioned: the hydraulic support pin 9 retracts, and the worker pushes the movable retaining ring 6 away from the fixed retaining ring 5; then the upper half sprocket 30 and the lower half sprocket 31 are removed from the support column 7 one by one. After disassembly, the sprocket 3 is flipped and swapped, and the repositioned sprocket 3 is then inserted into the support column 7 one by one; finally, the worker pushes the movable retaining ring 6 so that its side contacts the sprocket 3, controls the hydraulic support pin 9 to extend and contact the inclined groove 60, and pushes the movable retaining ring 6 towards the fixed retaining ring 5 to clamp the sprocket 3.

[0046] When the chain grooves on both sides of sprocket 3 are worn and need to be replaced, the same steps as above are used; except that instead of changing their positions, a new sprocket 3 is replaced.

[0047] The above structural design eliminates the need for bolt removal; at the same time, since both the upper sprocket 30 and the lower sprocket 31 are supported by support columns 7 during the assembly and disassembly process, no worker assistance is required.

[0048] Furthermore, the fixed retaining ring 5 is provided with an oil cavity 10 that is slidably connected to the support column 7. Each support column 7 is connected to a corresponding oil cavity 10, and the oil cavities 10 are interconnected. The fixed retaining ring 5 is provided with an oil injection hole 11, which is connected to any oil cavity 10. The oil injection hole 11 is connected to a hydraulic pipe, and hydraulic oil is injected into each oil cavity 10 through the oil injection hole 11.

[0049] When the sprocket 3 needs to be replaced or swapped, the hydraulic support pin 9 retracts, and hydraulic oil is injected into the oil chamber 10 through the oil injection hole 11, causing the support column 7 to move axially and push the movable retaining ring 6 axially through the connecting hole 33. This prevents the movable retaining ring 6 from getting stuck and being unable to be pushed manually.

[0050] After replacement, the movable retaining ring 6 can be pushed to reset each support column 7 and drain the oil from the oil chamber 10.

[0051] Furthermore, the hydraulic support pin 9 includes a cylinder 90 and a pin 91. The pin 91 is slidably connected to the cylinder 90, and the cylinder 90 is fixedly connected to the sprocket cylinder 2. The sprocket cylinder 2 has a first oil passage 92 and a second oil passage 93 that communicate with the cylinder 90. The first oil passages 92 of each hydraulic support pin 9 are connected to each other, and the second oil passages 93 of each hydraulic support pin 9 are connected to each other.

[0052] When oil is injected into the second oil passage 93, it pushes the pin 91 upward to extend; when oil is injected into the first oil passage 92, it pushes the pin 91 downward to retract. Specifically: when oil is injected into the second oil passage 93, a one-way valve (in-only) is connected to the second oil passage 93 to prevent oil from flowing out of the second oil passage 93, keeping the pin 91 in the extended state. However, when oil is injected into the first oil passage 92, the one-way valve at the second oil passage 93 needs to be removed first to drain the oil inside.

[0053] Furthermore, the end of the pin 91 is conical, which, when engaged with the inclined groove 60, can convert the upward thrust of the pin 91 into an axial thrust on the movable retaining ring 6.

[0054] Furthermore, connecting components 12 are provided on both sides of the sprocket shaft 1. Quick-release is achieved through the connecting components 12. The connecting component 12 includes a connecting plate 121, a sliding block 122, and a fixing block 123; the connecting plate 121 has an opening slot 124 for connecting to the sprocket shaft 1; the sliding block 122 is slidably connected to the opening slot 124, and the fixing block 123 is detachably connected to the connecting plate 121, sealing the opening of the opening slot 124; a limiting component is provided between the connecting plate 121 and the sliding block 122.

[0055] The connecting plate 121 is fixedly connected to the body of the scraper conveyor. When it is necessary to replace or change the sprocket 3, the restriction on the sliding block 122 is released by the limiting component, allowing the sliding block 122 to move away from the sprocket shaft 1, giving the sprocket shaft 1 sufficient room to move. By pushing the sprocket shaft 1 towards the sliding block 122, the chain is slack, facilitating the installation and removal of the sprocket 3.

[0056] Furthermore, the fixing block 123 is inserted into the connecting plate 121, and the fixing block 123 and the connecting plate 121 are connected by bolts. When disassembling or assembling the sprocket shaft 1, the fixing block 123 needs to be removed first, and then the sprocket shaft 1 can be moved out of or into the opening slot 124. Specifically, both ends of the sprocket shaft 1 are non-circular shafts, and each has a flat surface that contacts the opening slot 124.

[0057] Furthermore, the limiting component includes a fixed cam 125 and a fixed handle 126. The fixed cam 125 is rotatably connected to the connecting plate 121, and the side of the fixed cam 125 contacts the outer surface of the sliding block 122. The fixed handle 126 is fixedly connected to the fixed cam 125, and the fixed handle 126 is connected to the connecting plate 121 by a connecting bolt 127.

[0058] When it is necessary to replace or change the sprocket 3, first remove the connecting bolt 127 between the fixed handle 126 and the connecting plate 121; then drive the fixed cam 125 to rotate through the fixed handle 126, so that the highest point of the fixed cam 125 is away from the sliding block 122, until the lowest point of the fixed cam 125 is opposite to the sliding block 122, that is, release the restriction on the sliding block 122, and then push the sliding block 122 to move away from the sprocket shaft 1.

[0059] After replacing or swapping the sprocket 3, rotate the handle in the opposite direction to gradually bring the highest point of the fixed cam 125 closer to the sliding block 122. During this process, the sliding block 122 and the sprocket shaft 1 will be pushed to move and reset. After the highest point of the fixed cam 125 contacts the sliding block 122, the fixed handle 126 is fixed to the connecting plate 121 by the connecting bolt 127.

[0060] Specifically: Support plates 15 are fixedly connected to the upper and lower sides of the connecting plate 121, on which jacks can be placed to drive the handle to rotate. In use, the upper and lower ends of the jacks contact the support plates 15 and the handle, respectively.

[0061] Furthermore, the fixed cams 125 in the two connecting components 12 are fixedly connected to each other by a fixed shaft 128, with both ends of the fixed shaft 128 fixedly connected to the fixed cams 125 respectively. That is, when one of the fixed cams 125 rotates, it will drive the other fixed cam 125 to rotate accordingly through the fixed shaft 128.

[0062] Furthermore, the aforementioned fixing block 123 is connected to the connecting plate 121 by bolts; during assembly and disassembly, the bolts need to be removed to separate the fixing block 123. In addition to bolt connection, the following structural configuration can also be used, which can eliminate the need for bolt removal.

[0063] A limiting plate 129 is rotatably connected to a fixed cam 125, and a limiting post 1210 that cooperates with the limiting plate 129 is provided on the fixed cam 125; a fixed block 123 is inserted into a connecting plate 121, and connecting posts 1211 are spaced apart on the fixed block 123, and a baffle 1212 is fixedly connected between the connecting posts 1211; a hook portion 1213 is provided at the end of the limiting plate 129, and the hook portion 1213 can extend into the space between the connecting posts 1211.

[0064] When it is necessary to disassemble or assemble the sprocket shaft 1, after the fixed cam 125 rotates (the highest point of the fixed cam 125 moves away from the sliding block 122), the limiting post 1210 on the fixed cam 125 will move away from the limiting plate 129, thereby releasing the restriction on the limiting plate 129; the hook part 1213 can be moved out from between the connecting posts 1211 by pushing the limiting plate 129 to rotate; at this time, the fixed block 123 can be pulled out.

[0065] After the sprocket shaft 1 is installed, the fixing block 123 is reinserted into the connecting plate 121; then the fixing cam 125 rotates in the opposite direction, and the limiting post 1210 will drive the limiting plate 129 to rotate together, so that the hook part 1213 extends into the connecting post 1211 to fix the fixing block 123; finally, tighten the connecting bolt 127.

[0066] Furthermore, a bearing is provided between the sprocket shaft 1 and the sprocket cylinder 2, and the bearing requires lubrication. Therefore, the existing sprocket shaft 1 has an oil injection hole 11 at its end, and the oil injection hole 11 is connected to an oil injection connector 13.

[0067] To prevent the oil filling connector 13 from accidentally coming off, a limiting ring 14 is fixedly connected to the oil filling connector 13, and a groove 1214 that mates with the oil filling connector 13 is provided on the limiting plate 129. When the hook part 1213 extends into the connecting post 1211, the limiting plate 129 will block the limiting ring 14, thereby preventing the oil filling connector 13 from coming off.

[0068] The above description only illustrates preferred embodiments of the present invention, but the present invention is not limited to the above embodiments.

Claims

1. A sprocket assembly for a coal mine scraper conveyor, characterized in that: It includes a sprocket shaft (1), a sprocket cylinder (2) and a sprocket (3). The sprocket cylinder (2) is rotatably connected to the sprocket shaft (1). There are two sprockets (3) and they are arranged on the sprocket shaft (1). The sprocket (3) includes an upper sprocket (30) and a lower sprocket (31). Both the upper sprocket (30) and the lower sprocket (31) are provided with keyways (32). A corresponding connecting key (4) is fixedly connected to the sprocket cylinder (2). The sprocket cylinder (2) is provided with a fixed retaining ring (5) and a movable retaining ring (6). The fixed retaining ring (5) is fixedly connected to the sprocket cylinder (2), and the movable retaining ring (6) is slidably connected to the sprocket cylinder (2). The fixed retaining ring (5) is provided with at least two support columns (7). The upper half sprocket (30) and the lower half sprocket (31) are both provided with connection holes (33) corresponding to the support columns (7). The sprocket (3) is located between the fixed retaining ring (5) and the movable retaining ring (6); both the fixed retaining ring (5) and the movable retaining ring (6) are provided with connecting grooves (8), and both the upper half sprocket (30) and the lower half sprocket (31) are provided with connecting protrusions (34) corresponding to the connecting grooves (8). The sprocket cylinder (2) is provided with at least two hydraulic support pins (9) in the circumferential direction, and the movable retaining ring (6) is provided with a slanted groove (60) that cooperates with the hydraulic support pins (9). Both sides of the sprocket shaft (1) are provided with connecting components (12); the connecting components (12) include a connecting plate (121), a sliding block (122) and a fixing block (123); the connecting plate (121) is provided with an opening groove (124) for connecting to the sprocket shaft (1); the sliding block (122) is slidably connected to the opening groove (124), and the fixing block (123) is detachably connected to the connecting plate (121), and the opening of the opening groove (124) is blocked by the fixing block (123); a limiting component is provided between the connecting plate (121) and the sliding block (122); The limiting component includes a fixed cam (125) and a fixed handle (126). The fixed cam (125) is rotatably connected to the connecting plate (121), and the side of the fixed cam (125) contacts the outer surface of the sliding block (122). The fixed handle (126) is fixedly connected to the fixed cam (125), and the fixed handle (126) is connected to the connecting plate (121) by a connecting bolt (127). The fixed retaining ring (5) is provided with an oil cavity (10) that is slidably connected to the support column (7). Each support column (7) is connected to an oil cavity (10), and the oil cavities (10) are connected to each other. The fixed retaining ring (5) is provided with an oil injection hole (11), which is connected to any oil cavity (10). Oil is injected into the oil chamber (10) through the oil injection hole (11), which pushes the support column (7) and the movable retaining ring (6) to move axially.

2. The sprocket assembly of a coal mine scraper conveyor according to claim 1, characterized in that: The hydraulic support pin (9) includes a cylinder (90) and a pin (91). The pin (91) is slidably connected to the cylinder (90), and the cylinder (90) is fixedly connected to the sprocket cylinder (2). The sprocket cylinder (2) is fixedly connected to a first oil passage (92) and a second oil passage (93) that communicate with the cylinder (90). The first oil passages (92) of each hydraulic support pin (9) are connected to each other, and the second oil passages (93) of each hydraulic support pin (9) are connected to each other.

3. The sprocket assembly of a coal mine scraper conveyor according to claim 2, characterized in that: The end of the pin (91) is conical.

4. The sprocket assembly of a coal mine scraper conveyor according to claim 1, characterized in that: The fixing block (123) is inserted into the connecting plate (121), and the fixing block (123) and the connecting plate (121) are connected by bolts.

5. The sprocket assembly of a coal mine scraper conveyor according to claim 1, characterized in that: The fixed cams (125) in the two connecting components (12) are fixedly connected by a fixed shaft (128), and the two ends of the fixed shaft (128) are fixedly connected to the fixed cams (125) respectively.

6. A sprocket assembly for a coal mine scraper conveyor according to claim 1 or 5, characterized in that: The fixed cam (125) is rotatably connected to the limiting plate (129), and the fixed cam (125) is provided with limiting posts (1210) that cooperate with the limiting plate (129); the fixed block (123) is inserted into the connecting plate (121), and the fixed block (123) is provided with connecting posts (1211) spaced apart, and the connecting posts (1211) are fixedly connected with baffles (1212); the end of the limiting plate (129) is provided with a hook (1213), which can extend into the connecting posts (1211).

7. The sprocket assembly of a coal mine scraper conveyor according to claim 6, characterized in that: The end of the sprocket shaft (1) is provided with an oil injection hole (11), the oil injection hole (11) is connected to an oil injection connector (13), a limit ring (14) is fixedly connected to the oil injection connector (13), and a groove (1214) matching the oil injection connector (13) is provided on the limit plate (129); support plates (15) are fixedly connected to the upper and lower sides of the connecting plate (121).

Images