Coupling with axial alignment adjusting device

Abstract

The invention relates to the technical field of couplings, in particular to a coupling with an axial alignment adjusting device. The device comprises a driving connecting shaft and an execution connecting shaft, a rubber pad is arranged between the driving connecting shaft and the execution connecting shaft, the driving connecting shaft and the rubber pad are the same in structure, the driving connecting shaft comprises an adaptive groove far away from one end of a shaft hole, and when the adaptive groove moves to the end of an adaptive convex block, a positioning column is inserted into the inner wall of a positioning hole for positioning; the driving connecting shaft is fixed to the output end of the motor, meanwhile, the execution connecting shaft is fixed to the end of the connecting shaft, and when the connecting shaft and the output shaft are not coaxial, due to the fact that the rubber pad is made of rubber, deformation is generated by extruding the threaded groove; therefore, the stability of the two shafts in the transmission process is guaranteed, extra loads caused by different axes to the connecting shafts are avoided, and the service life of the connecting shafts is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of couplings, and more specifically, to a coupling with an axial alignment adjustment device. Background Art

[0002] A coupling is a device used to connect two shafts or a shaft and a rotating part, which rotates together during the transmission of motion and power and does not disengage under normal circumstances. In actual applications, due to reasons such as equipment installation errors, vibrations during operation, and wear of components, it is often difficult to maintain precise coaxiality between the two shafts. This requires the coupling to have a certain axial alignment adjustment ability.

[0003] Regarding couplings, there are many existing technologies, for example: Chinese Patent Publication No. CN207111743U discloses a coupling, which relates to the technical field of dynamic equipment. In this coupling, a trapezoidal locking nut is used instead of an ordinary locking nut, and the trapezoidal locking nut is connected to the shaft sleeve through an axial positioning bolt, and the trapezoidal locking nut is connected to the shaft head through a radial positioning bolt, so that the shaft sleeve, the trapezoidal locking nut, and the shaft are tightly connected as a whole, ensuring that the locking nut does not loosen during the operation of the equipment, and further ensuring that the mating surface of the shaft sleeve and the shaft is not damaged, enabling the coupling to transmit power and torque better and the equipment to operate normally.

[0004] However, in the actual use process, there are still some problems: 1. During the operation of industrial equipment, affected by factors such as equipment vibration, foundation settlement, and sudden load changes, it is difficult to completely avoid the offset of the axes of the two shafts. When facing this kind of offset, the existing couplings cannot effectively compensate and adjust axially, resulting in key components such as shafts, bearings, and connecting shafts bearing additional bending moments, torques, and shear forces, greatly reducing the service life of the coupling; 2. The assembly process of traditional couplings involves multiple fine steps and requires precise alignment of the axes of the two shafts. This process relies on operators to repeatedly calibrate using precision measuring tools such as dial indicators and laser alignment instruments. Any slight deviation may affect the operating performance of the coupling and the assembly efficiency of the coupling.

[0005] In view of this, we propose a coupling with an axial alignment adjustment device. Summary of the Invention

[0006] The purpose of the present invention is to provide a coupling with an axial alignment adjustment device to solve the problems raised in the above background art.

[0007] To achieve the above object, the object of the present invention is to provide a coupling with an axial alignment adjustment device, which includes a driving connecting shaft and an executing connecting shaft. A rubber pad is provided between the driving connecting shaft and the executing connecting shaft. The driving connecting shaft and the rubber pad have the same structure. The driving connecting shaft includes an adapter groove at one end away from the shaft hole. A positioning post is provided on the inner wall of the adapter groove, and a fixing hole is provided at the top of the positioning post. The rubber pad includes adapter bumps provided on both end faces, and the adapter bumps are in a cross shape. The adapter bumps are adapted to the adapter groove. When the adapter groove moves to the end of the adapter bump, the positioning post is inserted into the inner wall of the positioning hole for positioning. An adjusting component is provided at the top of the adapter bump, and the adjusting component is used to fix the driving connecting shaft and the executing connecting shaft provided on both sides of the rubber pad.

[0008] As a further improvement of the technical solution, a threaded groove is provided at the center of the surface of the rubber pad, and the rubber pad deforms at the position of the threaded groove when subjected to axial and radial external forces.

[0009] As a further improvement of the technical solution, a locking groove is provided at the end of the driving connecting shaft. When the output shaft is connected to the shaft hole at the end of the driving connecting shaft, the locking groove is locked by a connecting bolt, so that the output shaft is fixedly connected to the shaft hole.

[0010] As a further improvement of the technical solution, the adjusting component includes a groove provided at the top of the adapter bump. A fixing post is slidably provided inside the groove, and the fixing post penetrates through the groove to the center of the positioning hole. When the fixing post is inserted into the center of the positioning hole, the fixing hole is fixed.

[0011] As a further improvement of the technical solution, a compression spring is provided between the groove and the fixing post, and the compression springs are arranged in a circular array.

[0012] As a further improvement of the technical solution, ear plates are provided on both sides of the fixing post, and threaded holes are provided at the centers of the ear plates. The ear plates are fixed to the surface of the rubber pad by fixing bolts.

[0013] As a further improvement of the technical solution, a guiding groove is provided at the end of the positioning post. When the positioning post moves, the guiding groove slides along the bottom of the fixing post until the fixing post is adapted and fixed to the fixing hole.

[0014] As a further improvement of the technical solution, a lubricating component is provided at the tops of the driving connecting shaft and the executing connecting shaft. The lubricating component is used to add lubricating oil to reduce the friction between the shaft and the shaft hole.

[0015] As a further improvement of the technical solution, the lubricating component includes an oil injection nozzle provided at the top of the driving connecting shaft. A communication groove is provided between the oil injection nozzle and the shaft hole, and an oil passage is provided on the inner wall of the shaft hole. The oil passage is arranged in a ring shape below the communication groove.

[0016] Advantages of the present invention compared with the prior art: 1. In the coupling with the axial alignment adjusting device, the driving connecting shaft is fixed to the output end of the motor. At the same time, the executing connecting shaft is fixed to the end of the connecting shaft. When the connecting shaft and the output shaft are not on the same axis, since the rubber pad is made of rubber, deformation is generated by extruding the thread groove, thereby ensuring the stability of the two-shaft transmission process, avoiding additional load on the connecting shaft due to different axles, and thus increasing its service life.

[0017] 2. In the coupling with the axial alignment adjusting device, when connecting the output shaft and the shaft hole, by inserting the shaft hole at the end of the driving connecting shaft onto the surface of the output shaft. Since a locking groove is provided at the end of the driving connecting shaft, the diameter of the shaft hole at the end of the driving connecting shaft is larger than that of the output shaft, thereby facilitating the rapid assembly of the driving connecting shaft and the output shaft. When the assembly is completed, by tightening the connecting bolts provided on the surface of the locking groove, the gap between the locking grooves is tightened, so that the output shaft is fastened to the inner wall of the shaft hole at the end of the driving connecting shaft, improving the transmission efficiency of the output shaft.

[0018] 3. In the coupling with the axial alignment adjusting device, when the mating convex block moves, the guiding groove slides along the bottom of the fixed column until the fixed column is fitted and fixed with the fixing hole. When the mating convex block slides on the inner wall of the mating groove, the positioning hole moves on the surface of the positioning column. During the movement of the positioning hole, the guiding groove first contacts the bottom of the fixed column, and the end of the positioning column presses the fixed column. The fixed column slides upward in the vertical direction under the external force, and at the same time, the fixed column stretches the compression spring. The bottom of the fixed column slides on the surface of the guiding groove until above the fixing hole. At this time, the supporting force received by the bottom of the fixed column disappears, and under the action of the compression spring, the bottom of the fixed column is fitted and fixed with the fixing hole, thereby improving the assembly efficiency. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is an exploded view of the overall structure of the present invention; Figure 3 is a cross-sectional view of the overall structure of the present invention; Figure 4 is of the present invention Figure 3 schematic diagram at position A; Figure 5 is a schematic diagram of the rubber pad structure of the present invention; Figure 6 is a cross-sectional view of the rubber pad of the present invention; Figure 7 is a schematic diagram of the driving connecting shaft structure of the present invention; Figure 8Cross-sectional view of the drive connecting shaft of the present invention.

[0020] The meanings of the various reference numerals in the figure are as follows: 100, drive connecting shaft; 101, mating groove; 102, positioning post; 103, fixing hole; 104, guiding groove; 105, locking groove; 200, rubber pad; 201, mating convex block; 202, positioning hole; 203, threaded groove; 300, execution connecting shaft; 400, adjusting assembly; 401, groove; 402, fixing post; 403, compression spring; 404, ear plate; 500, lubricating assembly; 501, oil injection nozzle; 502, communicating groove; 503, oil passage. Specific embodiments

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0023] A coupling is a device used to connect two shafts or a shaft and a rotating part, which rotates together during the transmission of motion and power and does not disengage under normal circumstances. In actual applications, due to reasons such as equipment installation errors, vibrations during operation, and wear of parts, it is often difficult to maintain precise coaxiality between the two shafts. This requires the coupling to have a certain axial alignment adjustment ability. During the operation of industrial equipment, affected by factors such as equipment vibration, foundation settlement, and sudden load changes, the offset of the two shaft centers is difficult to completely avoid. When facing this kind of offset, the existing couplings cannot effectively compensate and adjust the axial direction, resulting in additional bending moments, torques, and shear forces on key components such as shafts, bearings, and connecting shafts, and greatly reducing the service life of the coupling.

[0024] The purpose of this embodiment is to provide a coupling with an axial alignment adjustment device. Refer to Figures 1-8 As shown in the figure, it includes a driving connecting shaft 100 and an executing connecting shaft 300. A rubber pad 200 is provided between the driving connecting shaft 100 and the executing connecting shaft 300. The driving connecting shaft 100 and the rubber pad 200 have the same structure. The driving connecting shaft 100 includes an adaptation groove 101 at one end away from the shaft hole. A positioning post 102 is provided on the inner wall of the adaptation groove 101, and a fixing hole 103 is provided at the top of the positioning post 102. The rubber pad 200 includes adaptation bumps 201 provided on both end faces. The adaptation bumps 201 are in a cross shape. The adaptation bumps 201 are adapted to the adaptation groove 101. When the adaptation groove 101 moves to the end of the adaptation bump 201, the positioning post 102 is inserted into the inner wall of the positioning hole 202 for positioning. An adjustment assembly 400 is provided at the top of the adaptation bump 201. The adjustment assembly 400 is used to fix the driving connecting shaft 100 and the executing connecting shaft 300 provided on both sides of the rubber pad 200.

[0025] By fixing the driving connecting shaft 100 to the motor output end, and at the same time, fixing the executing connecting shaft 300 to the end of the connecting shaft. When the connecting shaft and the output shaft are not on the same axis, since the rubber pad 200 is made of rubber, deformation is generated by extruding the threaded groove 203. When it is difficult to completely avoid the offset of the two shafts due to equipment vibration, the stability during the transmission of the two shafts is ensured, and the additional load on the connecting shaft caused by different axes is avoided, improving the stability of the connecting shaft.

[0026] When the coupling is in use, the driving connecting shaft 100 is fixed on one side of the motor output shaft. When connecting the connecting shafts, in order to avoid the connecting shafts not being on the same axis, which will generate additional bending moments, torques, shear forces, etc. on the shaft, bearings and the connecting shaft itself. Long-term exposure to these additional loads will cause fatigue failure of the shaft, such as cracks or even fractures. Therefore, a threaded groove 203 is provided at the center of the surface of the rubber pad 200. When the rubber pad 200 is subjected to axial and radial external forces, deformation occurs at the position of the threaded groove 203. During the connection process of the two shafts, by fixing the driving connecting shaft 100 to the motor output end, and at the same time, fixing the executing connecting shaft 300 to the end of the connecting shaft. When the connecting shaft and the output shaft are not on the same axis, since the rubber pad 200 is made of rubber, deformation is generated by extruding the rubber pad 200, thus ensuring the stability during the transmission of the two shafts, avoiding the additional load on the connecting shaft caused by different axes, and thus increasing its service life.

[0027] When connecting the output shaft of the motor to the drive connecting shaft 100, in order to avoid gaps between the output shaft and the end shaft hole of the drive connecting shaft 100, which may affect the transmission efficiency, a locking groove 105 is provided at the end of the drive connecting shaft 100. When the output shaft is connected to the shaft hole at the end of the drive connecting shaft 100, the locking groove 105 is locked by a connecting bolt, so that the output shaft is fixedly connected to the shaft hole. When connecting the output shaft to the shaft hole, the shaft hole at the end of the drive connecting shaft 100 is inserted onto the surface of the output shaft. Since the locking groove 105 is provided at the end of the drive connecting shaft 100, the diameter of the shaft hole at the end of the drive connecting shaft 100 is larger than that of the output shaft, which facilitates the quick assembly of the drive connecting shaft 100 and the output shaft. When the assembly is completed, the connecting bolt provided on the surface of the locking groove 105 is tightened, so that the gap between the locking grooves 105 is tightened, and thus the output shaft is fastened to the inner wall of the shaft hole at the end of the drive connecting shaft 100, improving the transmission efficiency of the output shaft.

[0028] When transmitting power through the connecting shaft, in order to prevent loosening between the drive connecting shaft 100, the rubber pad 200, and the actuating connecting shaft 300, which may cause the rubber pad 200 to bear excessive torque, resulting in deformation and damage of the rubber pad 200 and affecting its service life, the adjusting assembly 400 includes a groove 401 provided at the top of the fitting convex block 201. A fixing column 402 is slidably provided inside the groove 401. The fixing column 402 passes through the groove 401 to the center of the positioning hole 202. When the fixing column 402 is inserted into the center of the positioning hole 202, the fixing hole 103 is fixed. When the drive connecting shaft 100 and the rubber pad 200 are fitted, the fitting convex block 201 provided at the end of the rubber pad 200 slides along the inner wall of the fitting groove 101. During the sliding of the fitting convex block 201, the positioning hole 202 slides along the surface of the positioning column 102. During the movement of the positioning hole 202, the end of the positioning column 102 presses against the bottom of the groove 401, causing the groove 401 to move in the vertical direction. When the positioning hole 202 and the positioning column 102 are fully fitted, the groove 401 is pressed so that its bottom is inserted into the fixing hole 103, thereby realizing the limiting and fixing between the drive connecting shaft 100 and the rubber pad 200. Similarly, by repeating the above operations for the rubber pad 200 and the actuating connecting shaft 300, the assembly and fixation between the drive connecting shaft 100, the rubber pad 200, and the actuating connecting shaft 300 can be achieved, thus preventing loosening during transmission and reducing the service life of the rubber pad 200 due to excessive torsion.

[0029] During the actual assembly process, in order to improve the assembly efficiency among the driving connecting shaft 100, the rubber pad 200, and the executing connecting shaft 300, therefore, a compression spring 403 is provided between the groove 401 and the fixing post 402. The compression springs 403 are arranged in an annular array. A guiding groove 104 is provided at the end of the positioning post 102. When the positioning post 102 moves, the guiding groove 104 slides along the bottom of the fixing post 402 until the fixing post 402 is fitted and fixed with the fixing hole 103. When the fitting bump 201 slides on the inner wall of the fitting groove 101, the positioning hole 202 moves on the surface of the positioning post 102. During the movement of the positioning hole 202, the guiding groove 104 first contacts the bottom of the fixing post 402. The end of the positioning post 102 presses the fixing post 402, and the fixing post 402 slides upward in the vertical direction under the action of an external force. At the same time, the fixing post 402 stretches the compression spring 403. The bottom of the fixing post 402 slides on the surface of the guiding groove 104 until it is above the fixing hole 103. At this time, the supporting force received by the bottom of the fixing post 402 disappears. Under the action of the compression spring 403, the bottom of the fixing post 402 is fitted and fixed with the fixing hole 103, thus improving the assembly efficiency.

[0030] Considering that during the rotation of the coupling, the fixing post 402 is stretched by the centrifugal force to compress the spring 403, causing the bottom of the fixing post 402 to disengage from the fixing hole 103, resulting in unstable connection during the assembly of the driving connecting shaft 100 and the rubber pad 200. Therefore, ear plates 404 are provided on both sides of the fixing post 402. A threaded hole is provided at the center of the ear plate 404. The ear plate 404 is fixed to the surface of the rubber pad 200 through a fixing bolt. By fixing the ear plates 404 on both sides of the fixing post 402, the stability of the coupling connection is ensured during the rotation and transmission of the coupling.

[0031] During the use of the coupling, in order to ensure the smoothness during the assembly of the driving connecting shaft 100, the executing connecting shaft 300, and the output shaft, therefore, it is necessary to inject lubricating oil into the inner walls of the driving connecting shaft 100 and the executing connecting shaft 300. In order to evenly apply the lubricating oil to their inner walls, therefore, a lubricating component 500 is provided at the tops of the driving connecting shaft 100 and the executing connecting shaft 300. The lubricating component 500 is used to add lubricating oil to reduce the friction between the shaft and the shaft hole. The lubricating component 500 includes an oil injection nozzle 501 provided at the top of the driving connecting shaft 100. A communication groove 502 is provided between the oil injection nozzle 501 and the shaft hole. An oil passage 503 is provided on the inner wall of the shaft hole. The oil passage 503 is arranged in a ring shape below the communication groove 502. By injecting lubricating oil into the inner wall of the oil injection nozzle 501, the lubricating oil flows into the communication groove 502 and is distributed to both sides of the oil passage 503 through the bottom of the communication groove 502, so that the lubricating oil quickly fills the inner wall of the oil passage 503, making the lubricating oil evenly distributed between the inner wall of the shaft hole of the driving connecting shaft 100 and the shaft, and quickly disassembling the coupling.

[0032] During specific use, when connecting the two shafts, the driving connecting shaft 100 is fixed to the motor output end, and at the same time, the executing connecting shaft 300 is fixed to the end of the connecting shaft. When the connecting shaft and the output shaft are not on the same axis, since the rubber pad 200 is made of rubber, deformation is generated by extruding the thread groove 203, thereby ensuring the stability during the transmission of the two shafts, avoiding additional load on the connecting shaft due to different axes, and thus increasing its service life; When connecting the output shaft and the shaft hole, the shaft hole at the end of the driving connecting shaft 100 is inserted onto the surface of the output shaft. Since a locking groove 105 is provided at the end of the driving connecting shaft 100, the diameter of the shaft hole at the end of the driving connecting shaft 100 is larger than that of the output shaft, thus facilitating the quick assembly of the driving connecting shaft 100 and the output shaft. When the assembly is completed, by tightening the connecting bolts provided on the surface of the locking groove 105, the gap between the locking grooves 105 is tightened, so that the output shaft is fixed to the inner wall of the shaft hole at the end of the driving connecting shaft 100, improving the transmission efficiency of the output shaft; When the fitting convex block 201 moves, the guiding groove 104 slides along the bottom of the fixing column 402 until the fixing column 402 is fitted and fixed with the fixing hole 103. When the fitting convex block 201 slides on the inner wall of the fitting groove 101, the positioning hole 202 moves on the surface of the positioning column 102. During the movement of the positioning hole 202, the guiding groove 104 first contacts the bottom of the fixing column 402, and the end of the positioning column 102 presses the fixing column 402. The fixing column 402 slides upward in the vertical direction under the action of an external force. At the same time, the fixing column 402 stretches the compression spring 403. The bottom of the fixing column 402 slides on the surface of the guiding groove 104 until above the fixing hole 103. At this time, the supporting force received by the bottom of the fixing column 402 disappears, and under the action of the compression spring 403, the bottom of the fixing column 402 is fitted and fixed with the fixing hole 103, thereby improving the assembly efficiency; By injecting lubricating oil into the inner wall of the oil injection nozzle 501, the lubricating oil flows into the communication groove 502 and is branched to both sides of the oil passage 503 through the bottom of the communication groove 502, so that the lubricating oil quickly fills the inner wall of the oil passage 503, and the lubricating oil is evenly distributed between the inner wall of the shaft hole of the driving connecting shaft 100 and the shaft, reducing the friction between them and facilitating the loading and unloading of the connecting shaft.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A coupling with an axial alignment adjustment device, characterized in that: It includes a driving connecting shaft and an executing connecting shaft, a rubber pad is arranged between the driving connecting shaft and the executing connecting shaft, the driving connecting shaft and the rubber pad have the same structure, the driving connecting shaft includes an adapting groove away from one end of the shaft hole, the inner wall of the adapting groove is provided with a positioning column, the top of the positioning column is provided with a fixing hole, the rubber pad includes adapting protrusions provided on both side end faces, the adapting protrusions are cross-shaped, the adapting protrusions are adapted to the adapting groove, when the adapting groove moves to the end of the adapting protrusion, the positioning column is inserted into the inner wall of the positioning hole for positioning, the top of the adapting protrusion is provided with an adjusting component, the adjusting component is used to fix the driving connecting shaft and the executing connecting shaft provided on both sides of the rubber pad.

2. The coupling with axial alignment adjustment device according to claim 1, characterized in that: A thread groove is arranged at the center of the surface of the rubber pad, and the rubber pad is deformed at the position of the thread groove when subjected to axial and radial external forces.

3. The coupling with axial alignment adjustment device according to claim 1, characterized in that: The end of the driving connecting shaft is provided with a locking groove. When the output shaft is connected to the shaft hole at the end of the driving connecting shaft, the locking groove is locked by a connecting bolt to fix the output shaft to the shaft hole.

4. The coupling with axial alignment adjustment device according to claim 1, characterized in that: The adjustment component includes a groove arranged on the top of the adapter protrusion, a fixing column is slidably arranged inside the groove, and the fixing column passes through the groove to the center of the positioning hole. When the fixing column is inserted into the center of the positioning hole, the fixing hole is fixed.

5. The coupling with axial alignment adjustment device according to claim 4, characterized in that: Compression springs are arranged between the grooves and the fixing columns, and the compression springs are arranged in a ring array.

6. The coupling with axial alignment adjustment device according to claim 5, characterized in that: Ear plates are arranged on both sides of the fixing column, threaded holes are opened at the centers of the ear plates, and the ear plates are fixed to the surface of the rubber pad by fixing bolts.

7. The coupling with axial alignment adjustment device according to claim 1, characterized in that: A guide groove is provided at the end of the positioning column. When the positioning column moves, the guide groove slides in contact with the bottom of the fixing column until the fixing column is fitted and fixed in the fixing hole.

8. The coupling with axial alignment adjustment device according to claim 1, characterized in that: A lubrication assembly is provided on the top of the driving connection shaft and the execution connection shaft, and the lubrication assembly is used to add lubricating oil to reduce the friction between the shaft and the shaft hole.

9. The coupling with axial alignment adjustment device according to claim 8, characterized in that: The lubrication assembly includes an oiling nozzle arranged on the top of the driving connecting shaft, a connecting groove is arranged between the oiling nozzle and the shaft hole, an oil path is arranged on the inner wall of the shaft hole, and the oil path is arranged in a ring shape below the connecting groove.

Images