Maintenance-free chain wheel set for coal mining machine

Abstract

The utility model discloses a kind of coal winning machine maintenance-free sprocket sets, belong to coal winning machine sprocket technical field, comprising: first sprocket and second sprocket;Mounting groove, open in first sprocket side, second sprocket one end is in mounting groove, first sprocket and second sprocket are all equipped with mounting hole, two The mounting hole is equipped with the same mounting rod;Positioning groove, open in two mounting holes, the mounting rod outside is equipped with the mounting ring compatible with positioning groove;The utility model, through the oil inlet channel and oil discharge channel being arranged in mounting rod and mounting ring, the closed-loop management of sprocket set lubricating system is realized, old grease discharge and new grease filling can be completed without repeatedly disassembling sealing assembly, not only significantly reduce the coal dust invasion risk, avoid the performance attenuation caused by sealing element frequent disassembly, also save the time and manpower to grease replacement, so that the convenience of coal winning machine maintenance-free sprocket set use is better.

Description

Technical Field

[0001] This utility model belongs to the field of coal mining machine sprocket technology, specifically relating to a maintenance-free sprocket assembly for a coal mining machine. Background Technology

[0002] The sprocket assembly of a coal mining machine is the core transmission component of the machine's traction unit. It consists of sprockets, bearings, seals, and mounting structures. Through engagement with the pins of the scraper conveyor, it converts the driving torque of the coal mining machine into linear traction force, enabling continuous advancement of the working face. Its working principle is based on the precise meshing of high-strength alloy sprockets and pins, combined with self-sealing bearings and a multi-layered protective sealing structure, ensuring stable transmission under combined conditions of coal dust, water mist, and impact loads. The maintenance-free sprocket assembly for coal mining machines reduces downtime for maintenance and lowers coal mine operation and maintenance costs through optimized materials, improved heat treatment processes, and innovative sealing structures.

[0003] Chinese Patent Publication No. CN219492985U discloses a maintenance-free sprocket assembly for a coal mining machine, relating to the field of coal mining machine sprocket assemblies. The assembly includes a device body, with an inner sleeve fixedly connected to the center of its inner cavity. The inner sleeve has symmetrically arranged cavities at its top and bottom. A spacer pad is fixedly connected to the right side of each cavity, and a retaining ring is located to the left of the spacer pad. A first sealing ring is located to the right of the bottom of the inner sleeve. A self-sealing bearing is installed within each cavity. An installation groove is formed on the left side of the device body, with a pressure cap on the left side of the groove's inner cavity. A washer is located to the right of the pressure cap, and a bolt is located to the right of the washer. This utility model discloses a maintenance-free sprocket assembly for a coal mining machine. By using a self-sealing bearing, it replaces the bearings that require regular grease replenishment. Before installation, the self-sealing bearing is already greased, eliminating the need for further grease replenishment during coal mining operations, thus improving the maintenance-free function of the device body.

[0004] In actual use, the present invention typically achieves basic lubrication by pre-filling with grease. However, with continuous high-load operation, the grease will gradually age and fail, and needs to be replaced regularly to maintain bearing performance. However, the existing maintenance-free sprocket sets of coal mining machines usually rely on a single oil injection hole to complete the grease replacement, which requires repeated disassembly and reassembly of sealing components and cleaning of old grease residue during the replacement process. The operation process is cumbersome and time-consuming, thus making the maintenance-free sprocket sets of coal mining machines less convenient to use. Utility Model Content

[0005] This utility model proposes a maintenance-free sprocket assembly for coal mining machines to solve the problem of inconvenience in replacing the lubricating grease in the existing maintenance-free sprocket assembly.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a maintenance-free sprocket assembly for a coal mining machine, comprising: First sprocket and second sprocket; A mounting groove is provided on one side of the first sprocket, and one end of the second sprocket is located in the mounting groove. Both the first and second sprockets are provided with mounting holes, and the same mounting rod is provided through the two mounting holes. The positioning groove is formed in two mounting holes, and the mounting rod is provided with a mounting ring on the outside that is adapted to the positioning groove. The mounting ring is located in the positioning groove. Two bearing bodies are respectively disposed on both sides of the positioning groove. The two bearing bodies are respectively located on both sides of the mounting ring, and both bearing bodies are sleeved on the outside of the mounting rod.

[0007] In a preferred embodiment, both bearing bodies are provided with annular grooves, and both sides of the two annular grooves are provided with matching spherical rollers.

[0008] To facilitate the replacement of grease in the sprocket assembly of the coal mining machine, the mounting ring is further provided with multiple material passage holes. One side of the material passage hole is provided with an oil inlet channel, and the other side of the material passage hole is provided with an oil outlet channel. One end of the oil inlet channel and the oil outlet channel are both provided with a mounting rod and a connection port.

[0009] In a preferred embodiment, an arc-shaped sealing groove is provided on one side of each of the two mounting holes, and a sealing ring adapted to the sealing groove is provided on the outer side of the mounting rod, with the two sealing rings located in the two sealing grooves respectively.

[0010] In a preferred embodiment, limiting grooves are provided on both sides of the positioning groove, and two dustproof rings adapted to the limiting grooves are provided on the outer side of the mounting rod, with the two dustproof rings located in the two limiting grooves respectively.

[0011] In a preferred embodiment, the mounting rod has a drive groove, and a threaded rod is rotatably connected in the drive groove. The external threads on both sides of the threaded rod are arranged in opposite directions. Both sides of the threaded rod are fitted with matching sliding sleeves. Multiple guide plates are provided on the outer sides of the two sliding sleeves. A drive shaft is rotatably connected to one side of the drive groove. One end of the drive shaft passes through the side wall of the drive groove and extends to the outside. The other end of the drive shaft is provided with a first bevel gear. A second bevel gear that meshes with the first bevel gear is provided on the outer side of the threaded rod.

[0012] To further define the position of the sprocket assembly, multiple support slots are provided through both sides of the drive slot, and each of the multiple support slots is provided with a matching support rod. The multiple support rods are respectively located on one side of the first sprocket and the second sprocket, and each of the multiple support rods is provided with a guide shaft. Each of the multiple guide plates is provided with a guide slot that matches the guide shaft. The multiple guide slots are all inclined, and the multiple guide shafts are respectively located in the multiple guide slots and are slidably connected to the side walls of the multiple guide slots.

[0013] In a preferred embodiment, each of the plurality of support rods has a spherical groove on one side, and each of the plurality of spherical grooves has a matching guide ball, with one side of each of the plurality of guide balls abutting against one side of the first sprocket and the second sprocket respectively.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model realizes closed-loop management of the sprocket assembly lubrication system by setting oil inlet and outlet channels in the mounting rod and mounting ring. It can complete the discharge of old grease and the filling of new grease without repeatedly disassembling the sealing components. This not only significantly reduces the risk of coal dust intrusion and avoids the performance degradation caused by frequent disassembly and assembly of seals, but also saves time and manpower for grease replacement, making the maintenance-free sprocket assembly of the coal mining machine more convenient to use. 2. This utility model, through the sliding sleeves and multiple guide plates set on both sides of the threaded rod, in conjunction with multiple guide shafts and multiple guide grooves, can drive multiple support rods to move synchronously when the threaded rod rotates. When the multiple support rods respectively abut against the outside of the first sprocket and the second sprocket, the position of the coal mining machine sprocket group can be effectively limited, providing a highly reliable mechanical positioning guarantee for the maintenance-free sprocket group of the coal mining machine. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main appearance of the structure of this utility model; Figure 2 This is a schematic front cross-sectional view of the structure of this utility model; Figure 3 This is a schematic diagram showing the connection between the threaded rod, guide plate, and support rod of the present invention. Figure 4 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0016] In the diagram: 1. First sprocket; 2. Second sprocket; 3. Mounting rod; 4. Mounting ring; 5. Bearing body; 6. Spherical roller; 7. Oil inlet channel; 8. Oil outlet channel; 9. Connecting port; 10. Sealing ring; 11. Dustproof ring; 12. Threaded rod; 13. Sliding sleeve; 14. Guide plate; 15. Drive shaft; 16. First bevel gear; 17. Second bevel gear; 18. Support rod; 19. Guide shaft; 20. Guide ball. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Example 1: Please see Figure 1-4 This utility model provides a maintenance-free sprocket assembly for a coal mining machine, comprising: First sprocket 1 and second sprocket 2; A mounting groove is provided on one side of the first sprocket 1, and one end of the second sprocket 2 is located in the mounting groove. Both the first sprocket 1 and the second sprocket 2 are provided with mounting holes, and the same mounting rod 3 is provided through the two mounting holes. The positioning groove is opened in two mounting holes. The mounting rod 3 is provided with a mounting ring 4 that is adapted to the positioning groove on the outside. The mounting ring 4 is located in the positioning groove. Two bearing bodies 5 are respectively set on both sides of the positioning groove. The two bearing bodies 5 are respectively located on both sides of the mounting ring 4. Both bearing bodies 5 are sleeved on the outside of the mounting rod 3.

[0019] Specifically, such as Figure 2 and Figure 4 As shown, both bearing bodies 5 have annular grooves, and both sides of the two annular grooves are provided with matching spherical rollers 6. The multiple spherical rollers 6 can make the first sprocket 1 and the second sprocket 2 rotate more smoothly.

[0020] Specifically, such as Figure 2 As shown, the mounting ring 4 has multiple material passage holes. One side of the material passage hole has an oil inlet channel 7, and the other side of the material passage hole has an oil outlet channel 8. One end of the oil inlet channel 7 and the oil outlet channel 8 both pass through the mounting rod 3 and are provided with a connection port 9.

[0021] Through its design, the grease in the first sprocket 1 and the second sprocket 2 can be easily replaced by the oil inlet channel 7 and the oil outlet channel 8 set in the mounting rod 3, saving time and manpower for disassembling and reassembling the sealing components, making the maintenance-free sprocket set of the coal mining machine more convenient to use. The connection port 9 can control the opening and closing of the oil inlet channel 7 and the oil outlet channel 8.

[0022] Specifically, such as Figure 2 and Figure 4 As shown, an arc-shaped sealing groove is provided on one side of each of the two mounting holes. A sealing ring 10 that matches the sealing groove is provided on the outside of the mounting rod 3. The two sealing rings 10 are located in the two sealing grooves respectively. The sealing grooves and sealing rings 10 can ensure the sealing of the sprocket assembly and prevent the internal grease from leaking out.

[0023] Specifically, such as Figure 2 and Figure 4 As shown, limit grooves are provided on both sides of the positioning groove. Two dustproof rings 11 that are adapted to the limit grooves are provided on the outside of the mounting rod 3. The two dustproof rings 11 are located in the two limit grooves respectively. The limit grooves and dustproof rings 11 can improve the dustproof effect of the sprocket assembly and prevent external dust and impurities from entering the first sprocket 1 and the second sprocket 2.

[0024] Example 2: Please see Figure 1-4 This utility model provides a maintenance-free sprocket assembly for a coal mining machine, comprising: First sprocket 1 and second sprocket 2; A mounting groove is provided on one side of the first sprocket 1, and one end of the second sprocket 2 is located in the mounting groove. Both the first sprocket 1 and the second sprocket 2 are provided with mounting holes, and the same mounting rod 3 is provided through the two mounting holes. The positioning groove is opened in two mounting holes. The mounting rod 3 is provided with a mounting ring 4 that is adapted to the positioning groove on the outside. The mounting ring 4 is located in the positioning groove. Two bearing bodies 5 are respectively set on both sides of the positioning groove. The two bearing bodies 5 are respectively located on both sides of the mounting ring 4. Both bearing bodies 5 are sleeved on the outside of the mounting rod 3.

[0025] Specifically, such as Figure 2 and Figure 3 As shown, a drive groove is provided inside the mounting rod 3, and a threaded rod 12 is rotatably connected inside the drive groove. The external threads on both sides of the threaded rod 12 are arranged in opposite directions. When the threaded rod 12 rotates, it can drive the sliding sleeves 13 on both sides to move in opposite directions. Both sides of the threaded rod 12 are fitted with matching sliding sleeves 13. Multiple guide plates 14 are provided on the outer side of both sliding sleeves 13. A drive shaft 15 is rotatably connected to one side of the drive groove. One end of the drive shaft 15 passes through the side wall of the drive groove and extends to the outside. The other end of the drive shaft 15 is provided with a first bevel gear 16. A second bevel gear 17 that meshes with the first bevel gear 16 is provided on the outer side of the threaded rod 12. By rotating the drive shaft 15, the threaded rod 12 can be driven to rotate through the first bevel gear 16 and the second bevel gear 17.

[0026] Specifically, such as Figure 2 and Figure 3 As shown, multiple support grooves are provided through both sides of the drive groove, and each of the multiple support grooves is provided with a matching support rod 18. The multiple support rods 18 are located on one side of the first sprocket 1 and the second sprocket 2, and each of the multiple support rods 18 is provided with a guide shaft 19. Multiple guide plates 14 are provided with guide grooves that are compatible with the guide shafts 19. The multiple guide grooves are all inclined, and the multiple guide shafts 19 are located in the multiple guide grooves and are slidably connected to the side walls of the multiple guide grooves.

[0027] Through its design, when the sliding sleeve 13 drives multiple guide plates 14 to move, it will drive multiple guide shafts 19 and multiple support rods 18 to move through multiple guide grooves respectively, so that the multiple support rods 18 abut against one side of the first sprocket 1 and the second sprocket 2 respectively, which can limit their position and ensure the stability of the sprocket assembly.

[0028] Specifically, such as Figure 3 As shown, each of the multiple support rods has a spherical groove on one side, and each of the multiple spherical grooves has a matching guide ball 20. Each of the multiple guide balls 20 abuts against one side of the first sprocket 1 and the second sprocket 2 respectively. The guide balls 20 in the multiple spherical grooves can limit their position without affecting the rotation of the first sprocket 1 and the second sprocket 2.

[0029] See Figure 1-4 When using the maintenance-free sprocket assembly of a coal mining machine, grease needs to be added to the first sprocket 1 and the second sprocket 2 to improve their smooth rotation. The sealing ring 10 and dustproof ring 11 on one side of the first sprocket 1 and the second sprocket 2 can improve their sealing performance and prevent the internal grease from leaking out. After long-term use, when it is necessary to replace the internal grease, the grease can be drained through the oil drain channel 8 and grease can be added to the sprocket assembly through the oil inlet channel 7. When installing the sprocket assembly, the drive shaft 15 needs to be rotated, and the drive shaft 15 will... The first bevel gear 16 and the second bevel gear 17 drive the threaded rod 12 to rotate. The threaded rod 12 drives the sliding sleeves 13 on both sides to move. The two sliding sleeves 13 drive multiple guide plates 14 to move respectively. The multiple guide plates 14, through multiple guide shafts 19 and multiple guide grooves, can simultaneously drive multiple support rods 18 to move, so that the multiple support rods 18 respectively abut against one side of the first sprocket 1 and the second sprocket 2. This can effectively limit the position of the coal mining machine sprocket group and provide a highly reliable mechanical positioning guarantee for the maintenance-free sprocket group of the coal mining machine.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A maintenance-free sprocket assembly for a coal mining machine, characterized in that, include: First sprocket (1) and second sprocket (2); The mounting groove is opened on one side of the first sprocket (1), and one end of the second sprocket (2) is located in the mounting groove. The first sprocket (1) and the second sprocket (2) are both provided with mounting holes, and the two mounting holes are provided with the same mounting rod (3). The positioning groove is opened in two mounting holes. The mounting rod (3) is provided with a mounting ring (4) that is adapted to the positioning groove on the outside. The mounting ring (4) is located in the positioning groove. Two bearing bodies (5) are respectively set on both sides of the positioning groove. The two bearing bodies (5) are respectively located on both sides of the mounting ring (4). The two bearing bodies (5) are both sleeved on the outside of the mounting rod (3).

2. The maintenance-free sprocket assembly for a coal mining machine according to claim 1, characterized in that: Both bearing bodies (5) have annular grooves, and both sides of the two annular grooves are provided with matching spherical rollers (6).

3. The maintenance-free sprocket assembly for a coal mining machine according to claim 1, characterized in that: The mounting ring (4) is provided with multiple material passage holes. One side of the material passage hole is provided with an oil inlet channel (7), and the other side of the material passage hole is provided with an oil outlet channel (8). One end of the oil inlet channel (7) and the oil outlet channel (8) are both provided with a mounting rod (3) and a connection port (9).

4. The maintenance-free sprocket assembly for a coal mining machine according to claim 1, characterized in that: Both mounting holes have arc-shaped sealing grooves on one side, and the mounting rod (3) has a sealing ring (10) that matches the sealing groove on the outside. The two sealing rings (10) are located in the two sealing grooves respectively.

5. A maintenance-free sprocket assembly for a coal mining machine according to claim 1, characterized in that: The positioning groove has a limiting groove on both sides, and the mounting rod (3) has two dustproof rings (11) on the outside that are adapted to the limiting groove. The two dustproof rings (11) are located in the two limiting grooves respectively.

6. The maintenance-free sprocket assembly for a coal mining machine according to claim 1, characterized in that: The mounting rod (3) has a drive groove, and a threaded rod (12) is rotatably connected in the drive groove. The external threads on both sides of the threaded rod (12) are arranged in opposite directions. Both sides of the threaded rod (12) are fitted with matching sliding sleeves (13). Multiple guide plates (14) are provided on the outer side of the two sliding sleeves (13). A drive shaft (15) is rotatably connected to one side of the drive groove. One end of the drive shaft (15) passes through the side wall of the drive groove and extends to the outside. The other end of the drive shaft (15) is provided with a first bevel gear (16). A second bevel gear (17) that meshes with the first bevel gear (16) is provided on the outer side of the threaded rod (12).

7. A maintenance-free sprocket assembly for a coal mining machine according to claim 6, characterized in that: Multiple support grooves are provided through both sides of the drive groove, and each of the multiple support grooves is provided with a matching support rod (18). The multiple support rods (18) are respectively located on one side of the first sprocket (1) and the second sprocket (2). Each of the multiple support rods (18) is provided with a guide shaft (19). Each of the multiple guide plates (14) is provided with a guide groove that matches the guide shaft (19). The multiple guide grooves are all inclined. The multiple guide shafts (19) are respectively located in the multiple guide grooves and are slidably connected to the side walls of the multiple guide grooves.

8. A maintenance-free sprocket assembly for a coal mining machine according to claim 7, characterized in that: Each of the multiple support rods (18) has a spherical groove on one side, and each of the multiple spherical grooves has a matching guide ball (20). Each of the multiple guide balls (20) abuts against the first sprocket (1) and the second sprocket (2) on one side respectively.

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