Magnetic coupling with torsion overload protection

Abstract

The magnetic coupler with the torsion overload protection function comprises a first connecting end, a second connecting end, a first annular magnet and a second annular magnet, the first connecting end comprises a sleeve part and a connecting part connected to one end of the sleeve part, and the second connecting end comprises a rotating shaft part and a circular truncated cone part arranged on the periphery of the rotating shaft part. The rotating shaft part is rotationally connected with an inner ring of the sleeve part, the first annular magnet and the sleeve part are concentrically arranged and fixedly connected into the inner ring of the sleeve part, and the second annular magnet is arranged on an outer ring of the circular truncated cone part in a sleeving mode and movably arranged in an inner ring of the first annular magnet; the inner ring of the first annular magnet and the outer ring of the second annular magnet are opposite in polarity. The motor overload protection device is simple in structure, convenient to realize connection of the motor and the load end, capable of protecting the motor and avoiding overload burning loss of the motor when the motor is overloaded, capable of prolonging the service life of the motor and the coupler, worthy of use and worthy of popularization and application.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to a magnetic coupling with torque overload protection. Background Art

[0002] A coupling refers to a device that connects two shafts or a shaft and a rotating part, rotates together during the transmission of motion and power, and does not disengage under normal circumstances. Basically, the couplings on the market are all hard connections. When the motor is overloaded, the output end of the motor is still connected to the load end, and the coupling will not automatically disengage, which easily leads to the burnout of the motor and the fracture of the coupling, affecting the service life of the motor and causing unnecessary losses, and there are great troubles in use. Summary of the Invention

[0003] The problem to be solved by the utility model is to provide a magnetic coupling with torque overload protection, which can protect the motor when the motor is overloaded, avoid the burnout of the overloaded motor, and improve the service life.

[0004] To solve the above technical problem, a magnetic coupling with torque overload protection provided by the utility model includes a first connection end, a second connection end, a first annular magnet, and a second annular magnet. The first connection end includes a sleeve portion and a connection portion connected to one end of the sleeve portion. The second connection end includes a rotating shaft portion and a frustum portion provided on the periphery of the rotating shaft portion. The rotating shaft portion is rotatably connected to the inner ring of the sleeve portion. The first annular magnet is concentrically arranged with the sleeve portion and fixedly connected to the inner ring of the sleeve portion. The second annular magnet is sleeved on the outer ring of the frustum portion, and the second annular magnet is movably arranged in the inner ring of the first annular magnet. The polarities of the inner ring of the first annular magnet and the outer ring of the second annular magnet are opposite.

[0005] Preferably, bearings are provided at both ends of the inner ring of the sleeve portion, and the rotating shaft portion is connected to the inner ring of the bearing.

[0006] Preferably, the connection portion is arranged in a circular ring shape and has a first shaft hole. A first key groove is provided at one end of the first shaft hole, and a first pin hole communicating with the first shaft hole is penetrated through the side wall of the connection portion.

[0007] Preferably, a second shaft hole is penetrated through the center of the rotating shaft portion. A second key groove is provided at one end of the second shaft hole, and a second pin hole communicating with the second shaft hole is penetrated through the side wall of the rotating shaft portion.

[0008] Preferably, limiting platforms are provided at both ends of the frustum portion, and one end face of the bearing is adjacent to one end face of the limiting platform.

[0009] Preferably, the first annular magnet and the second annular magnet are respectively bonded to the inner ring of the sleeve portion and the outer ring of the frustum portion by glue.

[0010] The beneficial effects of the present utility model are as follows: The present utility model provides a magnetic coupling with torque overload protection, which can connect the output shaft of the motor to one end of the rotating shaft part and connect the load end to the connecting part. The first annular magnet and the second annular magnet will generate an adsorption effect and output through the motor to the load end. When the output torque value of the motor is within the suction force range between the first annular magnet and the second annular magnet, the first annular magnet and the second annular magnet will be firmly adsorbed together, and the first connecting end and the second connecting end will rotate synchronously, and the motor can stably output to the load end; when the output torque value of the motor exceeds the suction force between the first annular magnet and the second annular magnet, slipping will occur between the first annular magnet and the second annular magnet, and the first connecting end and the second connecting end will not rotate synchronously, avoiding excessive load on the motor. When the load drops to an appropriate range, the output torque value of the motor is within the suction force range between the first annular magnet and the second annular magnet, the first annular magnet and the second annular magnet will be firmly adsorbed together, and the first connecting end and the second connecting end will rotate synchronously, and the motor can stably output to the load end. Its structure is simple, without the need for alignment operations of the first connecting end and the second connecting end, facilitating the connection between the motor and the load end. When the motor is overloaded, it can protect the motor, avoid burnout due to overload of the motor, improve the service life of the motor and the coupling, and is more worry-free to use, worthy of popularization and application. Description of the Drawings

[0011] Figure 1 Illustrates the external structure schematic diagram of the present utility model.

[0012] Figure 2 Illustrates the cross-sectional view of the present utility model.

[0013] Figure 3 Illustrates the exploded structure schematic diagram of the present utility model.

[0014] Explanation of the reference numerals in the drawings: First connecting end 1, sleeve part 10, connecting part 11, first shaft hole 110, first keyway 111, first pin hole 112, second connecting end 2, rotating shaft part 20, second shaft hole 200, second keyway 201, second pin hole 202, frustum part 21, limiting table 210, first annular magnet 3, second annular magnet 4, bearing 5. Detailed Embodiments

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure.

[0016] Based on the embodiments of the present disclosure described, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present disclosure.

[0017] Reference Figures 1-3 。

[0018] The utility model provides a magnetic coupling with torque overload protection, which includes a first connection end 1, a second connection end 2, a first annular magnet 3, and a second annular magnet 4. The first connection end 1 includes a sleeve portion 10 and a connection portion 11 connected to one end of the sleeve portion 10. The second connection end 2 includes a rotating shaft portion 20 and a frustum portion 21 provided on the circumference of the rotating shaft portion 20. The rotating shaft portion 20 is rotatably connected to the inner ring of the sleeve portion 10. The first annular magnet 3 is concentrically arranged with the sleeve portion 10 and fixedly connected in the inner ring of the sleeve portion 10. The second annular magnet 4 is sleeved on the outer ring of the frustum portion 21. The second annular magnet 4 is movably arranged in the inner ring of the first annular magnet 3. The polarities of the inner ring of the first annular magnet 3 and the outer ring of the second annular magnet 4 are opposite.

[0019] Its working principle is as follows: The output shaft of the motor can be connected to one end of the rotating shaft portion 20, and the load end can be connected to the connection portion 11. The first annular magnet 3 and the second annular magnet 4 will generate an adsorption effect and output to the load end through the motor. When the output torque value of the motor is within the suction force range between the first annular magnet 3 and the second annular magnet 4, the first annular magnet 3 and the second annular magnet 4 will be firmly adsorbed together, and the first connection end 1 and the second connection end 2 will rotate synchronously, and the motor can stably output to the load end. When the output torque value of the motor exceeds the suction force between the first annular magnet 3 and the second annular magnet 4, slipping will occur between the first annular magnet 3 and the second annular magnet 4, and the first connection end 1 and the second connection end 2 will not rotate synchronously, avoiding excessive load on the motor. When the load drops to an appropriate range, the output torque value of the motor is within the suction force range between the first annular magnet 3 and the second annular magnet 4, the first annular magnet 3 and the second annular magnet 4 will be firmly adsorbed together, and the first connection end 1 and the second connection end 2 will rotate synchronously, and the motor can stably output to the load end. Its structure is simple, without the need for alignment operations of the first connection end 1 and the second connection end 2, facilitating the connection between the motor and the load end. When the motor is overloaded, it can protect the motor, avoid burnout of the motor due to overload, improve the service life of the motor and the coupling, and is more worry-free to use, worthy of popularization and use.

[0020] Based on the above embodiments, bearings 5 are provided at both ends of the inner ring of the sleeve portion 10, and the rotating shaft portion 20 is connected to the inner ring of the bearing 5. When slippage occurs between the first connection end 1 and the second connection end 2, the rotating shaft portion 20 will rotate within the sleeve portion 10. Connecting the sleeve portion 10 and the rotating shaft portion 20 through the bearing 5 can ensure the stable rotation of the first connection end 1 and the second connection end 2 and reduce the wear of the sleeve portion 10 and the rotating shaft portion 20.

[0021] Based on the above embodiments, the connecting portion 11 is arranged in a circular ring shape and has a first shaft hole 110. A first keyway 111 is provided at one end of the first shaft hole 110, and a first pin hole 112 communicating with the first shaft hole 110 is penetratingly provided on the side wall of the connecting portion 11. During assembly, the connecting shaft of the load end is inserted into the first shaft hole 110, a flat key is inserted into the first keyway 111, and a pin is used to connect the first pin hole 112 and the pin hole on the connecting shaft, which facilitates the connection of the load end to the first connection end 1.

[0022] Based on the above embodiments, a second shaft hole 200 is penetratingly provided through the center of the rotating shaft portion 20. A second keyway 201 is provided at one end of the second shaft hole 200, and a second pin hole 202 communicating with the second shaft hole 200 is penetratingly provided on the side wall of the rotating shaft portion 20. During assembly, the output shaft of the motor is inserted into the second shaft hole 200, a flat key is inserted into the second keyway 201, and a pin is used to connect the second pin hole 202 and the pin hole on the motor output shaft, which facilitates the connection of the motor to the second connection end 2.

[0023] Based on the above embodiments, limiting platforms 210 are provided at both ends of the frustum portion 21, and one end face of the bearing 5 is adjacent to one end face of the limiting platform 210, which can play a role in limiting the bearing 5.

[0024] Based on the above embodiments, the first annular magnet 3 and the second annular magnet 4 are respectively bonded to the inner ring of the sleeve portion 10 and the outer ring of the frustum portion 21 by glue, which can achieve stable connection between the first annular magnet 3, the second annular magnet 4 and the sleeve portion 10, the frustum portion 21.

[0025] The above embodiments are only descriptions of the preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A magnetic coupling with torque overload protection, characterized in that: It includes a first connecting end, a second connecting end, a first annular magnet, and a second annular magnet. The first connecting end includes a sleeve portion and a connecting portion connected to one end of the sleeve portion. The second connecting end includes a rotating shaft portion and a truncated cone portion arranged on the circumference of the rotating shaft portion. The rotating shaft portion is rotatably connected to the inner ring of the sleeve portion. The first annular magnet is concentrically arranged with the sleeve portion and fixedly connected to the inner ring of the sleeve portion. The second annular magnet is sleeved on the outer ring of the truncated cone portion. The second annular magnet is movably arranged in the inner ring of the first annular magnet. The polarity of the inner ring of the first annular magnet and the outer ring of the second annular magnet are opposite.

2. A magnetic coupling with torque overload protection according to claim 1, characterized in that: Both ends of the inner ring of the sleeve portion are provided with bearings, and the rotating shaft portion is connected to the inner ring of the bearings.

3. A magnetic coupling with torque overload protection according to claim 2, characterized in that: The connecting portion is arranged in an annular shape and has a first axial hole, one end of the first axial hole is provided with a first keyway, and a first pin hole communicating with the first axial hole is penetrated through a side wall of the connecting portion.

4. A magnetic coupling with torque overload protection according to claim 3, characterized in that: A second shaft hole is provided through the center of the shaft portion, a second keyway is provided at one end of the second shaft hole, and a second pin hole communicating with the second shaft hole is provided through the side wall of the shaft portion.

5. A magnetic coupling with torque overload protection according to claim 4, characterized in that: Limiting platforms are arranged at both ends of the truncated cone portion, and one end surface of the bearing is adjacent to one end surface of the limiting platform.

6. A magnetic coupling with torque overload protection according to claim 1, characterized in that: The first annular magnet and the second annular magnet are respectively bonded to the inner ring of the sleeve portion and the outer ring of the truncated cone portion by glue.

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