Crowned gear coupling for stretch reducing mill

Abstract

The utility model discloses a crowned gear coupling for a stretch reduction mill, which comprises a connecting sleeve, a gear shaft sleeve and a crowned gear shaft, the connecting sleeve is in butt joint with the crowned gear shaft to form a butt joint chamber I, one end of the gear shaft sleeve is in butt joint with the crowned gear shaft, the other end of the gear shaft sleeve forms a butt joint chamber II, and the other end of the gear shaft sleeve is in butt joint with the crowned gear shaft. The first butt joint cavity is suitable for being in butt joint with an output shaft of a stretch reducing mill, the second butt joint cavity is suitable for being in butt joint with a transmission shaft of other equipment, the connecting sleeve and the crowned gear shaft are in butt joint through a positioning assembly, the positioning precision of inner teeth and outer teeth is improved in the mode that an additional positioning assembly is independently arranged, and the overall using effect of the coupler is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, and specifically, to a drum gear coupling for a pipe reducing and expanding mill. Background Art

[0002] At present, as an important mechanical transmission component, the drum gear coupling is widely used in various mechanical equipment. Especially in low-speed and heavy-load working conditions, such as the metallurgy, mining, hoisting and transportation industries, as well as the shafting transmission systems in the petroleum, chemical, and general machinery industries, the drum gear coupling has become an indispensable part of modern industry due to its advantages of compact structure, small turning radius, large load-bearing capacity, high transmission efficiency, low noise, and long maintenance cycle.

[0003] After retrieval, it is found that the Chinese invention patent with the application publication number of CN105422658A discloses a drum gear coupling. The inner tooth outer sleeve and the outer tooth inner sleeve are connected through tooth fitting, and a compression spring and a rigid joint are provided to achieve fastening and stability. A fixed ring sleeve is provided on the outer wall of the inner tooth outer sleeve, and is fixed together with the screw holes on the outer tooth inner sleeve through connecting bolts. However, in occasions with high requirements for transmission accuracy, such as precision machinery and high-speed transmission, the connection method by bolts cannot provide more accurate positioning and better buffering effects. If the working environment of the equipment is relatively harsh, such as there are large vibrations, impacts or temperature changes, etc., the stability and reliability of the coupling cannot be guaranteed either. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art, and improve the positioning accuracy of the inner and outer teeth by separately setting an additional positioning component, so as to improve the overall use effect of the coupling.

[0005] To solve the above technical problem, the technical solution of the utility model is a drum gear coupling for a pipe reducing and expanding mill, which includes a connecting sleeve, a tooth shaft sleeve, and a drum gear shaft. After the connecting sleeve and the drum gear shaft are butted, a butting chamber one is formed. One end of the tooth shaft sleeve is butted with the drum gear shaft, and the other end of the tooth shaft sleeve forms a butting chamber two. The butting chamber one is suitable for butting with the output shaft of the pipe reducing and expanding mill, and the butting chamber two is suitable for butting with the transmission shaft of other equipment. The connecting sleeve and the drum gear shaft are butted through a positioning component.

[0006] Further, the positioning component includes a concave surface and a convex block. The concave surface is located inside the connecting sleeve, and the convex block is connected to one end of the drum gear shaft. The convex block is inserted into the concave surface.

[0007] Further, internal teeth are provided on the inner wall of the tooth shaft sleeve, external teeth are provided on the outside of the drum gear shaft, the external teeth are matched with the internal teeth, and the external teeth are drum-shaped to provide an activity space for compensating the angular deviation of the coupling.

[0008] Furthermore, a sealing groove is formed inside the connecting sleeve, and a sealing gasket is arranged outside the gear shaft sleeve. After the connecting sleeve is butted with the gear shaft sleeve, the sealing gasket is clamped in the sealing groove.

[0009] Furthermore, at least one drawing threaded hole is formed inside the gear shaft sleeve, and the drawing threaded hole is adapted to connect a drawing screw for disassembling the gear shaft sleeve.

[0010] Furthermore, a centering cover plate is connected inside the gear shaft sleeve, and an elastic element is arranged at one end of the centering cover plate. When the output shaft of the pipe reducing mill is inserted into the first butting chamber, the elastic element is extruded, and the elastic element is adapted to offset the axial force generated during the transmission of the output shaft of the pipe reducing mill.

[0011] Furthermore, the elastic element includes a guide rod and a spring. The guide rod is located at the axis position of the coupling. The guide rod is connected with the centering cover plate through the spring, and the guide rod is provided with a hollow interior.

[0012] Furthermore, a bushing is connected to one end of the drum-shaped gear shaft. A round hole is formed inside the bushing. The spring and the guide rod pass through the round hole. A butting bottom surface is formed on the bushing. After the output shaft of the pipe reducing mill extends into the first butting chamber, it is in close contact with the butting bottom surface. At least one main shaft butting hole penetrating through the bushing itself is formed inside the bushing, and the main shaft butting hole is adapted to fix the output shaft of the pipe reducing mill through a bolt;

[0013] A closed space is formed between the centering cover plate and the bushing, and the closed space is adapted to protect the connection part between the gear shaft sleeve and the drum-shaped gear shaft.

[0014] Furthermore, an oil injection channel is formed inside the connecting sleeve. A plug is arranged at the entrance of the oil injection channel. The oil injection channel includes a first channel and a second channel. The first channel is adapted to directly introduce oil into the oil injection chamber formed between the drum-shaped gear shaft and the connecting sleeve;

[0015] The guide rod is provided with a hollow interior. The second channel is adapted to introduce oil into the first butting chamber and flow into the second butting chamber through the center of the guide rod;

[0016] An oil filling and exhaust hole is formed inside the gear shaft sleeve, and a sealing ring is arranged inside the oil filling and exhaust hole.

[0017] Furthermore, a labyrinth seal is arranged on the end surface of the butting end of the connecting sleeve and the output shaft of the pipe reducing mill, and the labyrinth seal is sleeved outside the output shaft of the pipe reducing mill.

[0018] By adopting the above technical solutions, the utility model has the following beneficial effects:

[0019] 1. The setting of the concave surface and convex bumps makes the docking of the drum-shaped tooth shaft and the tooth shaft sleeve more precise, improves the meshing accuracy of the teeth, enhances the centering ability of the coupling, effectively reduces the vibration and wear caused by poor centering, and ensures the stable operation of the system.

[0020] 2. Through the setting of the pulling threaded hole, during the disassembly of the coupling, the drum-shaped tooth shaft to be disassembled can be directly pulled out by the pulling bolt, reducing the difficulty of disassembly and maintenance and the labor cost.

[0021] 3. The setting of the bushing prevents the elastic element spring from shifting after being squeezed, ensuring the normal operation of the function of the elastic element. At the same time, the closed space formed between the bushing and the centering cover plate can effectively prevent impurities from entering the joint of the external teeth and internal teeth, playing a protective role, and also ensuring the structural stability of the coupling, reducing the misalignment phenomenon caused by the deformation or wear of the external teeth. By maintaining an appropriate gap, the bushing can reduce the displacement of the external teeth during operation and reduce the stress concentration.

[0022] 4. Through the setting of the centering cover plate, it plays a role in stabilizing and fixing the spring alone, so that the elastic element will not shift during operation, thus maintaining the performance stability of the coupling and ensuring the consistency and reliability during the long-term operation of the coupling.

[0023] 5. Through the setting of the labyrinth seal, it can effectively prevent the lubricating oil or grease from leaking out of the coupling, ensuring the effectiveness of internal lubrication, reducing the consumption of lubricant. At the same time, it can effectively block external pollutants from entering the coupling, reducing the friction and wear during the operation of the coupling, thereby improving the overall operation efficiency and stability.

[0024] 6. Through the setting of the oil injection channel and the hollow guide rod, the overall lubrication effect inside the coupling can be achieved from a single oil injection hole, and the lubricating oil is quickly distributed inside the coupling through Channel 1 and Channel 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0026] Figure 2 It is a schematic diagram of the internal structure of the present utility model;

[0027] Figure 3 It is a central cross-sectional view of the present utility model;

[0028] Figure 4 It is a schematic diagram of the output shaft structure of the tension reducing mill of the present utility model.

[0029] In the figure: 1. Connecting sleeve; 2. Labyrinth seal; 3. Gear shaft sleeve; 4. Internal gear; 5. Drum-shaped gear shaft; 6. External gear; 7. Bushing; 8. Centering cover plate; 9. Guide rod; 10. Spring; 11. Sealing gasket; 12. Oil filling and exhaust hole; 13. Docking bottom surface; 14. Main shaft docking hole; 15. Pulling threaded hole; 16. Plug; 17. Oil injection channel; 18. Channel 1; 19. Channel 2; 20. Concave surface; 21. Convex block; 22. Output shaft of the tension reducing mill; 23. Closed space; 24. Docking chamber 1; 25. Docking chamber 2; 26. Oil injection chamber. Detailed implementation manners

[0030] In order to make the content of the present utility model easier to be clearly understood, the following further describes the present utility model in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0031] Embodiment 1

[0032] As Figure 1 shown, a drum-shaped tooth coupling for a tension reducing mill includes a connecting sleeve 1, a gear shaft sleeve 3 and a drum-shaped gear shaft 5. After the connecting sleeve 1 and the drum-shaped gear shaft 5 are docked, a docking chamber 1 24 is formed. One end of the gear sleeve 3 is docked with the drum-shaped gear shaft 5, and the other end of the gear sleeve 3 forms a docking chamber 2 25;

[0033] The docking chamber 1 24 is adapted to dock with the output shaft 22 of the tension reducing mill, and the docking chamber 2 25 is adapted to dock with the transmission shaft of other equipment;

[0034] The connecting sleeve 1 and the drum-shaped gear shaft 5 are docked through a positioning component.

[0035] In this embodiment, the docking chamber 2 25 and the transmission shaft are connected by splines, and the docking chamber 1 24 and the output shaft 22 of the tension reducing mill are connected by keys.

[0036] As Figure 2 shown, the positioning component includes a concave surface 20 and a convex block 21. The concave surface 20 is located inside the connecting sleeve 1, the convex block 21 is connected to one end of the drum-shaped gear shaft 5, and the convex block 21 is inserted into the concave surface 20.

[0037] As Figure 2 shown, internal teeth 4 are provided on the inner wall of the gear shaft sleeve 3, external teeth 6 are provided on the outside of the drum-shaped gear shaft 5, the external teeth 6 are matched with the internal teeth 4, the external teeth 6 are drum-shaped, and the matching of the drum-shaped external teeth 6 and the correspondingly shaped internal teeth 4 is used to provide angular deviation compensation for the coupling.

[0038] As Figure 2 shown, a sealing groove is formed inside the connecting sleeve 1, a sealing gasket 11 is provided on the outside of the gear shaft sleeve 3, and after the connecting sleeve 1 and the gear shaft sleeve 3 are docked, the sealing gasket 11 is clamped in the sealing groove.

[0039] As Figure 2As shown, at least one extraction threaded hole 15 is formed inside the gear shaft sleeve 3. The extraction threaded hole 15 is adapted to connect an extraction screw for disassembling the gear shaft sleeve 3.

[0040] As Figure 2 shown, a centering cover plate 8 is connected inside the gear shaft sleeve 3. One end of the centering cover plate 8 is provided with an elastic element. After the output shaft 22 of the tension reducing mill is inserted into the first docking chamber 24, the elastic element is extruded. The elastic element is adapted to offset the axial force generated during the transmission of the output shaft 22 of the tension reducing mill.

[0041] As Figure 2 shown, the elastic element includes a guide rod 9 and a spring 10. The guide rod 9 is located at the axis position of the centering cover plate 8. One end of the spring 10 is connected to the outer peripheral surface of the guide rod 9, and the other end of the spring 10 is connected to the centering cover plate 8.

[0042] As Figure 2 shown, a bushing 7 is connected to one end of the drum-shaped gear shaft 5. A round hole is formed inside the bushing 7. The spring 10 and the guide rod 9 pass through the round hole. A docking bottom surface 13 is formed on the bushing 7. After the output shaft 22 of the tension reducing mill extends into the first docking chamber 24, it is in close contact with the docking bottom surface 13. At least one main shaft docking hole 14 penetrating the main shaft of itself is formed inside the bushing 7. The main shaft docking hole 14 is adapted to pass through bolts to fix the output shaft 22 of the tension reducing mill;

[0043] A closed space 23 is formed between the centering cover plate 8 and the bushing 7. The closed space 23 is adapted to protect the connection part of the gear shaft sleeve 3 and the drum-shaped gear shaft 5.

[0044] The working principle of this embodiment is as follows:

[0045] During use, first, the connecting sleeve 1 and the drum-shaped gear shaft 5 are docked through the concave surface 20 and the convex block 21. After docking, the gear shaft sleeve 3 is inserted between the connecting sleeve 1 and the drum-shaped gear shaft 5, and the external teeth 6 and the internal teeth 4 are engaged. At the same time, the gasket 11 on the gear shaft sleeve 3 is snapped into the sealing groove inside the connecting sleeve 1 to form a seal. Finally, the connecting sleeve 1 and the gear shaft sleeve 3 are fixed by bolts, and the three form the main structure of the drum-shaped tooth coupling;

[0046] The connecting sleeve 1 is integrally formed, effectively preventing the problems of water and impurities entering the joint surface;

[0047] The first docking chamber 24 and the second docking chamber 25 are respectively inserted with the output shaft 22 of the tension reducing mill and the linkage shaft. The cooperation of the drum-shaped external teeth 6 and internal teeth 4 can provide compensation adjustment when there is an angular deviation between the two shafts, and the gap between the concave surface 20 and the convex block 21 can provide a moving space;

[0048] During transmission, the axial force is buffered and compensated by the spring 10. A guide rod 9 is connected inside the spring 10. At the same time, one end of the spring 10 is fixed on the centering cover plate 8, and the centering cover plate 8 is connected to the gear shaft sleeve 3 to provide a supporting force for the spring 10, preventing the spring 10 from shifting after being stressed and maintaining the performance stability of the coupling. At the same time, the spring 10 and the guide rod 9 pass through a bushing 7 provided at one end of the drum-shaped gear shaft 5. The bushing 7 can also limit the spring 10 to prevent displacement. And an internal closed space 23 is formed between the bushing 7 and the centering cover plate 8 to further prevent impurities from entering the inside of the coupling and damaging the mating surface of the internal teeth 4 and the external teeth 6;

[0049] When inserting the output shaft 22 of the pipe reducing mill into the docking chamber one 24, the end face of the output shaft 22 of the pipe reducing mill squeezes the guide rod 9 to drive the spring 10 to compress. Finally, the end face of the output shaft 22 of the pipe reducing mill contacts the docking bottom surface 13 on the bushing 7, and then it is fixed through the main shaft docking hole 14 with fixing devices such as bolts. The coupling shaft is fixed inside the docking chamber two 25. After the two shafts are fixed, the work can be carried out normally;

[0050] When the coupling needs to be disassembled and repaired, in order to improve the disassembly efficiency of the drum-shaped gear shaft 5 and reduce the maintenance difficulty, therefore, a pulling threaded hole 15 is opened inside the drum-shaped gear shaft 5. When disassembling, the bolt is screwed into the pulling threaded hole 15, and the drum-shaped gear shaft 5 can be taken out by directly applying a pulling force to the bolt, which greatly improves the convenience.

[0051] Embodiment Two

[0052] As Figure 1 shown, this embodiment further includes the following structure on the basis of Embodiment One: An oil injection channel 17 is opened inside the connecting sleeve 1. A plug 16 is provided at the entrance of the oil injection channel 17. The oil injection channel 17 includes a channel one 18 and a channel two 19. The channel one 18 is adapted to directly introduce oil into the oil injection cavity 26 formed between the drum-shaped gear shaft 5 and the connecting sleeve 1;

[0053] The guide rod 9 is hollowly arranged. The channel two 19 is adapted to introduce oil into the docking chamber one 24 and flow into the docking chamber two 25 through the center of the guide rod 9;

[0054] It will also flow into the closed space 23 through the center of the guide rod 9;

[0055] An oil filling and exhaust hole 12 is opened inside the gear shaft sleeve 3, and a sealing ring is provided inside the oil filling and exhaust hole 12.

[0056] As Figure 2 shown, a labyrinth seal 2 is provided on the end face of the docking end of the connecting sleeve 1 and the output shaft 22 of the pipe reducing mill. The labyrinth seal 2 is sleeved outside the output shaft 22 of the pipe reducing mill.

[0057] The working principle of this embodiment is as follows:

[0058] When lubricating oil needs to be injected into the coupling, only the plug 16 needs to be opened to inject oil into the single oil injection channel 17. After injection, the oil can be quickly distributed to all parts inside the coupling.

[0059] After injection, the first channel 18 closest to the oil injection port first introduces part of the lubricating oil into the interior of the oil injection cavity 26. The oil injection cavity 26 can directly lubricate the mating surface of the external teeth 6 and the internal teeth 4. At the same time, when the entire oil injection cavity 26 is filled with lubricating oil, a second seal can be formed between the connecting sleeve 1 and the crowned gear shaft 5. The first seal is the cooperation between the gasket 11 and the seal groove.

[0060] The second channel 19 will introduce the lubricating oil into the interior of the docking chamber 1 24 to lubricate the output shaft 22 of the tension reducing mill and the spring 10. At the same time, part of the lubricating oil will flow into the hollow part in the middle of the guide rod 9 and finally flow into the docking chamber 2 25 to lubricate the linkage shaft. In the gap of the spring 10, the lubricating oil will gradually fill the sealed space, and the sealed space will further lubricate and seal the mating surface of the external teeth 6 and the internal teeth 4.

[0061] A labyrinth seal 2 is provided on the surface of the connecting sleeve 1 where it is docked with the output shaft 22 of the tension reducing mill. After the output shaft 22 of the tension reducing mill is inserted into the docking chamber 1 24, the labyrinth seal 2 covers part of the outer peripheral surface of the output shaft 22 of the tension reducing mill, further strengthening the sealing performance between the output shaft 22 of the tension reducing mill and the coupling and preventing impurities from entering the interior of the coupling.

[0062] The specific embodiments described above further elaborate on the technical problems solved, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A drum gear coupling for a tensioning and reducing machine, comprising a connecting sleeve (1), a gear shaft sleeve (3) and a drum gear shaft (5), wherein the connecting sleeve (1) and the drum gear shaft (5) are butted together to form a first butt joint chamber (24), one end of the gear shaft sleeve (3) is butt jointed with the drum gear shaft (5), and the other end of the gear shaft sleeve (3) forms a second butt joint chamber (25); The docking chamber 1 (24) is suitable for docking with the output shaft (22) of the tensioning and reducing machine, and the docking chamber 2 (25) is suitable for docking with the transmission shaft of other equipment; Features: The connecting sleeve (1) and the drum-shaped gear shaft (5) are butt-jointed via a positioning assembly.

2. The drum gear coupling for a tensioning and reducing machine according to claim 1, characterized in that: The positioning assembly comprises a concave surface (20) and a convex block (21), wherein the concave surface (20) is located inside the connecting sleeve (1), and the convex block (21) is connected to one end of the drum-shaped gear shaft (5), and the convex block (21) is inserted into the inside of the concave surface (20).

3. The drum gear coupling for a tensioning and reducing machine according to claim 1, characterized in that: The inner wall of the gear shaft sleeve (3) is provided with internal teeth (4), and the outer part of the drum-shaped gear shaft (5) is provided with external teeth (6). The external teeth (6) match the internal teeth (4), and the external teeth (6) are drum-shaped.

4. The drum gear coupling for a tensioning and reducing machine according to claim 1, characterized in that: A sealing groove is provided inside the connecting sleeve (1), and a sealing gasket (11) is provided outside the gear shaft sleeve (3). After the connecting sleeve (1) and the gear shaft sleeve (3) are butt-jointed, the sealing gasket (11) is clamped in the sealing groove.

5. The drum gear coupling for a tensioning and reducing machine according to claim 1, characterized in that: At least one pulling threaded hole (15) is provided inside the gear shaft sleeve (3), and the pulling threaded hole (15) is suitable for connecting a pulling screw to disassemble the gear shaft sleeve (3).

6. The drum gear coupling for a tensioning and reducing machine according to claim 1, characterized in that: The interior of the gear shaft sleeve (3) is connected to a centering cover plate (8), one end of which is provided with an elastic element. When the output shaft (22) of the tensioner is inserted into the docking chamber (24), the elastic element is squeezed. The elastic element is suitable for offsetting the axial force generated when the output shaft (22) of the tensioner is in transmission.

7. The drum gear coupling for a tensioning and reducing machine according to claim 6, characterized in that: The elastic element comprises a guide rod (9) and a spring (10); the guide rod (9) is located at the axial position of the centering cover plate (8); one end of the spring (10) is connected to the outer peripheral surface of the guide rod (9); and the other end of the spring (10) is connected to the centering cover plate (8).

8. The drum gear coupling for a tensioning and reducing machine according to claim 7, characterized in that: One end of the drum-shaped gear shaft (5) is connected to a bushing (7), a circular hole is provided inside the bushing (7), the spring (10) and the guide rod (9) pass through the circular hole, a docking bottom surface (13) is provided on the bushing (7), the output shaft (22) of the tensioner and reducer is inserted into the docking chamber (24) and then tightly abuts against the docking bottom surface (13), and at least one main shaft docking hole (14) penetrating through the bushing (7) is provided inside, and the main shaft docking hole (14) is suitable for passing bolts to fix the output shaft (22) of the tensioner and reducer.

9. The drum gear coupling for a tensioning and reducing machine according to claim 8, characterized in that: An oil injection channel (17) is provided inside the connecting sleeve (1), a plug (16) is provided at the entrance of the oil injection channel (17), the oil injection channel (17) comprises a channel 1 (18) and a channel 2 (19), the channel 1 (18) is suitable for directly introducing oil into an oil injection chamber (26) formed between the drum gear shaft (5) and the connecting sleeve (1); The guide rod (9) is hollow, and the second channel (19) is suitable for guiding the oil into the first docking chamber (24) and flowing into the second docking chamber through the center of the guide rod (9); A refueling and exhausting hole (12) is provided inside the gear shaft sleeve (3), and a sealing ring is provided inside the refueling and exhausting hole (12).

10. The drum gear coupling for a tensioning and reducing machine according to claim 1, characterized in that: A labyrinth seal (2) is provided on the end surface of the connecting sleeve (1) and the tensioner output shaft (22), and the labyrinth seal (2) is sleeved on the outside of the tensioner output shaft (22).

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