Conjugated double-layer magnetic coupling dynamic adjustable flexible torque output device

Abstract

The invention discloses a conjugate double-layer magnetic coupling dynamic adjustable flexible torque output device which comprises a coupling body with a driving shaft and a conductor with a driven shaft and further comprises a radial adjusting assembly and a driving assembly, and a plurality of evenly-distributed permanent magnets are arranged on the inner wall of the circumference of the inner circle of the coupling body in a surrounding mode. Elastic assemblies are arranged between the permanent magnets and the inner wall of the coupling body and support the permanent magnets, the conductors are located on the inner sides of the permanent magnets, and gaps are reserved between the conductors and the permanent magnets in the radial direction. The radial adjusting assembly comprises a shaft sleeve and a moving block connected with the shaft sleeve, the shaft sleeve movably sleeves the driving shaft and penetrates into the coupling body, a dynamic sealing structure is arranged between the shaft sleeve and the coupling body, the moving block is located among the permanent magnets in the coupling body and connected with the end of the shaft sleeve, and the moving block is in a circular truncated cone shape with the side face being an inclined face. The ends, close to the driving shaft, of the permanent magnets are inclined faces matched with the side faces of the moving blocks, and the permanent magnets make contact with the inclined faces of the side faces of the moving blocks through the end inclined faces.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic couplings, and in particular to a conjugated double-layer magnetic coupling dynamically adjustable flexible torque output device. Background Art

[0002] The basic principle of permanent magnet eddy current transmission technology is: when the permanent magnet rotor and the eddy current ring rotor make relative rotational motion, the permanent magnets with alternating magnetic pole directions on the permanent magnet rotor will generate an alternating magnetic field in the eddy current ring made of conductive material, and then induce alternating eddy currents in it. The eddy currents in turn generate an induced magnetic field in the eddy current ring. The induced magnetic field interacts with the permanent magnetic field on the permanent magnet rotor, generating a coupling torque between the two rotors, thereby achieving the purpose of transmitting motion and torque.

[0003] The existing permanent magnet eddy current coupling generally uses axial movement to adjust the clearance when adjusting the coupling torque. This not only limits the axial installation space, but also generates a large axial thrust and is not easy to lock the two shafts, so its application occasions are limited.

[0004] For example, publication number CN 112072891 A discloses a radially slidable permanent magnet eddy current coupling, which includes a first coupling with a driven shaft and a second coupling body with a driving shaft, the interior of the second coupling body is provided with a accommodating chamber, the accommodating chamber is provided with an adjusting motor, the output end of the adjusting motor is connected with a toothed disk, the axes of the driven shaft, the driving shaft and the toothed disk are located on the same straight line, a plurality of evenly distributed first permanent magnets and clamping blocks are provided on the inner wall of the first coupling body, the first permanent magnets and the clamping blocks are distributed at intervals, a radial adjustment mechanism is connected to the toothed disk, the radial adjustment mechanism drives the magnetic block support slide rod to displace along the radial direction of the second coupling body, and a locking component cooperating with the clamping block is also provided on one side of the magnetic block support slide rod.

[0005] The above-mentioned radially slidable permanent magnet eddy current coupling adjusts the radial direction of the magnetic block through a radial adjustment mechanism, but the radial adjustment mechanism has the problem of complex structure. Summary of the invention

[0006] In view of the above-mentioned technical problems existing in the existing permanent magnet eddy current coupling, the purpose of the present invention is to provide a conjugated double-layer magnetic coupling dynamically adjustable flexible torque output device, which drives the moving block to move through the shaft sleeve, and then through the simple inclined surface cooperation between the moving block and the permanent magnet, the axial movement of the moving block can drive the radial movement of the permanent magnet. The overall structure is simple and the operation is convenient.

[0007] In order to achieve the above-mentioned purpose, the conjugated double-layer magnetic coupling dynamically adjustable flexible torque output device provided by the present invention comprises a coupling body with a driving shaft and a conductor with a driven shaft, characterized in that it also comprises a radial adjustment component and a driving component, a plurality of evenly distributed permanent magnets are arranged around the inner circumferential inner wall of the coupling body, an elastic component is arranged between the permanent magnet and the inner wall of the coupling body, the plurality of elastic components support the plurality of permanent magnets, the conductor is located inside the plurality of permanent magnets, and radial gaps are left between the plurality of permanent magnets;

[0008] The radial adjustment assembly includes a shaft sleeve and a moving block connected to the shaft sleeve, wherein the shaft sleeve is movably inserted into the driving shaft and one end of the shaft sleeve is inserted into the coupling body, a dynamic sealing structure is configured between the shaft sleeve and the coupling body, the moving block is located between a plurality of permanent magnets in the coupling body and connected to the end of the shaft sleeve, the moving block is in the shape of a truncated cone with an inclined side surface, the ends of the plurality of permanent magnets close to the driving shaft are all set as inclined surfaces adapted to the side surface of the moving block, and the plurality of permanent magnets are in contact with the inclined surface of the side surface of the moving block through the inclined surface of the end;

[0009] The sleeve moves along the driving shaft toward the driven shaft and drives the moving block to move axially. The inclined surface of the moving block cooperates with the inclined surface of the permanent magnet, so that the permanent magnets can resist the elastic force of the elastic component and move relatively away radially.

[0010] The shaft sleeve is moved in the opposite direction, and the elastic restoring force of the elastic component can drive the plurality of permanent magnets to be relatively close in radial direction;

[0011] The driving assembly is fixed inside the driving shaft and connected to the shaft sleeve, and is used to drive the shaft sleeve to move inside the driving shaft.

[0012] Furthermore, the coupling body is a cylindrical structure with one end open and the other end closed. The drive shaft is connected to the closed end of the coupling body. A cavity is provided inside the drive shaft. An annular groove is provided on the closed end of the coupling body for the sleeve to pass through. The sleeve can be movably inserted into the internal cavity of the drive shaft and pass through the annular groove into the coupling body. The sleeve and the annular groove adopt a dynamic sealing structure.

[0013] Furthermore, the drive assembly includes a drive motor, a screw rod, and a threaded sleeve. The drive motor is fixed in the internal cavity of the drive shaft. The drive shaft of the drive motor is bolted to the screw rod. The threaded sleeve is threadedly connected to the screw rod and is connected to the inner wall of the sleeve.

[0014] Furthermore, a protrusion is provided on the outer wall of the sleeve, and a groove is provided on the inner wall of the drive shaft. The protrusion is movably arranged in the groove. The movement of the protrusion in the groove can guide the movement of the sleeve relative to the drive shaft, and the setting of the protrusion and the groove can also limit the circumferential rotation of the sleeve, thereby avoiding the circumferential rotation of the sleeve relative to the drive shaft.

[0015] Furthermore, a plurality of slide grooves are sequentially arranged in the circumferential direction of the end of the closed end of the coupling body, the plurality of slide grooves sequentially correspond to the plurality of permanent magnets, the slide grooves are arranged radially along the coupling body, and a sliding block movable therein is embedded in the slide grooves;

[0016] One end of the permanent magnet close to the driving shaft is composed of a straight surface and an inclined surface, the straight surface is connected to the sliding block, and the inclined surface is in contact with the side inclined surface of the moving block.

[0017] Furthermore, the inner wall of the coupling body is provided with a guide groove, the outer wall of the permanent magnet is provided with a guide block, the elastic component is provided with an opening for the guide block to pass through, and the guide block passes through the opening and is arranged in the guide groove.

[0018] The conjugated double-layer magnetic coupling dynamically adjustable flexible torque output device provided by the present invention drives the moving block to move through the shaft sleeve, and then through the simple inclined plane cooperation between the moving block and the permanent magnet, the axial movement of the moving block can drive the radial movement of the permanent magnet. The overall structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 A schematic diagram of the overall structure of the conjugated double-layer magnetically coupled dynamically adjustable flexible torque output device provided by the present invention;

[0021] Figure 2 A schematic structural diagram of the conjugated double-layer magnetically coupled dynamically adjustable flexible torque output device provided by the present invention after the radial adjustment component has moved axially;

[0022] Figure 3 A side cross-sectional view of the drive shaft and the sleeve in Embodiment 2;

[0023] Figure 4 Schematic diagram of the coupling body in Example 3;

[0024] Figure 5 This is a schematic structural diagram of the conjugated double-layer magnetically coupled dynamically adjustable flexible torque output device in Example 3;

[0025] Figure 6 A schematic diagram of the structure of a permanent magnet in a conjugated double-layer magnetically coupled dynamically adjustable flexible torque output device provided by the present invention;

[0026] Figure 7 This is a schematic diagram of the partial cross-sectional structure of the conjugated double-layer magnetically coupled dynamically adjustable flexible torque output device in Example 4.

[0027] Illustration Description:

[0028] Coupling body 100, conductor 200, radial adjustment component 300, driving component 400, elastic component 500;

[0029] Driving shaft 101, groove 102, slide groove 103, slider 104, guide groove 105, guide block 106, opening 107, straight surface 111, inclined surface 112, driven shaft 201, permanent magnet 110, sleeve 310, protrusion 311, moving block 320, driving motor 410, screw rod 420, threaded sleeve 430. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific diagrams.

[0031] Embodiment 1:

[0032] The conjugated double-layer magnetically coupled dynamically adjustable flexible torque output device provided in this scheme can move the permanent magnet radially through a simple structure, so that the gap between the permanent magnet and the conductor can be adjusted, thereby adjusting the mutual magnetic force to achieve low transmission torque or high transmission torque.

[0033] See also Figure 1 , which is a schematic diagram of the structure of the conjugated double-layer magnetically coupled dynamically adjustable flexible torque output device provided by the present invention.

[0034] As can be seen from the figure, the conjugated double-layer magnetic coupling dynamically adjustable flexible torque output device provided by the present invention includes four components: a coupling body 100 with a driving shaft 101 and a conductor 200 with a driven shaft 201, a radial adjustment component 300, and a driving component 400.

[0035] Among them, a plurality of evenly distributed permanent magnets 110 are arranged around the inner wall of the inner circumference of the coupling body 100, an elastic component 500 is arranged between the permanent magnet 110 and the inner wall of the coupling body 100, and the plurality of elastic components 500 support the plurality of permanent magnets 110, and the conductor 200 is located inside the plurality of permanent magnets 110, and radial gaps are left between the plurality of permanent magnets 110;

[0036] The radial adjustment assembly 300 includes a sleeve 310 and a moving block 320 connected to the sleeve 310. The sleeve 310 is movably arranged inside the drive shaft 101 and one end of the sleeve is arranged inside the coupling body 100. A dynamic sealing structure is configured between the sleeve 310 and the coupling body 100. The moving block 320 is located between a plurality of permanent magnets 110 in the coupling body 100 and connected to the end of the sleeve 310. The moving block 320 is in the shape of a truncated cone with an inclined side surface. The ends of the plurality of permanent magnets 110 close to the drive shaft 101 are all arranged to be inclined surfaces that match the side surfaces of the moving block 320. The plurality of permanent magnets 110 are in contact with the inclined surfaces of the side surfaces of the moving block 320 through the inclined surfaces at the ends.

[0037] like Figure 2 , the sleeve 310 moves along the driving shaft 101 toward the driven shaft 201 and drives the moving block 320 to move axially, and the inclined surface of the moving block 320 cooperates with the inclined surface of the permanent magnet 110, so that the permanent magnets 110 can resist the elastic force of the elastic component 500 and move relatively away from each other in the radial direction;

[0038] like Figure 1 , the sleeve 310 is moved in the opposite direction, and the elastic restoring force of the elastic component 500 can drive the plurality of permanent magnets 110 to be relatively close in radial direction;

[0039] The driving assembly 400 is fixed inside the driving shaft 101 and connected to the shaft sleeve 310 , and is used to drive the shaft sleeve 310 to move inside the driving shaft 101 .

[0040] Compared with the prior art, this solution drives the sleeve 310 through the driving assembly 400 to drive the moving block 320 to move. Through the simple inclined surface cooperation between the moving block 320 and the permanent magnet 110, the axial movement of the moving block 320 can drive the radial movement of the permanent magnet 110. The overall structure is simple and the operation is convenient.

[0041] Specifically, the coupling body 100 is a cylindrical structure with one end open and the other end closed. The drive shaft 101 is connected to the closed end of the coupling body 100. A cavity is provided inside the drive shaft 101. A circular groove is provided on the closed end of the coupling body 100 for the shaft sleeve 310 to pass through. The shaft sleeve 310 is movably arranged in the internal cavity of the drive shaft 101 and passes through the circular groove into the coupling body 100. The shaft sleeve 310 and the circular groove adopt a dynamic sealing structure;

[0042] The sealing structure is used to prevent the outside from communicating with the inside of the coupling body 100 . The sealing structure is a conventional technology in the art and will not be described in detail here.

[0043] The coupling body 100 is cylindrical for example only, and may be in other shapes, which is not limited in the present embodiment.

[0044] Furthermore, the present solution does not limit the specific structure of the elastic component 500, which can be determined according to actual needs. It only needs to support the permanent magnet 110 and when the moving block 320 moves in the opposite direction, the elastic component 500 can push the permanent magnets 110 to move radially and restore through the elastic restoring force. For example, it can be composed of several springs.

[0045] Furthermore, the conjugated double-layer magnetically coupled dynamically adjustable flexible torque output device provided by the present invention is also provided with a driving component 400, the driving end of the driving component 400 is connected to the sleeve 310, and the sleeve 310 is driven by the driving component to move along the driving shaft 101, thereby avoiding manual operation, and the movement of the sleeve 310 is more accurate through the control of the driving component, and after moving into place, the driving shaft of the driving component can also limit the axial movement of the sleeve 310 to prevent it from continuing to move.

[0046] Furthermore, the drive assembly 400 includes a drive motor 410, a screw rod 420, and a threaded sleeve 430. The drive motor 410 is fixed in the internal cavity of the drive shaft 101, the drive shaft of the drive motor 410 is bolted to the screw rod 420, the threaded sleeve 430 is threadedly connected to the screw rod 420, and the threaded sleeve 430 is connected to the inner wall of the sleeve 310.

[0047] Embodiment 2:

[0048] This embodiment describes the structure of the shaft sleeve 310 based on the embodiment 1, and the other structures are the same and will not be described in detail here.

[0049] like Figure 3 In order to further improve the reliability of movement between the sleeve 310 and the drive shaft 101, the present embodiment has a protrusion 311 on the outer wall of the sleeve 310, and a groove 102 on the inner wall of the drive shaft 101. The protrusion 311 is movably arranged in the groove 102. The movement of the protrusion 311 in the groove 102 can guide the movement of the sleeve 310 relative to the drive shaft 101, and the setting of the protrusion 311 and the groove 102 can also limit the circumferential rotation of the sleeve 310, thereby avoiding the circumferential rotation of the sleeve 310 relative to the drive shaft 101.

[0050] Embodiment 3:

[0051] This embodiment describes the structure of the permanent magnet 110 based on the first embodiment, and the rest of the structure is the same and will not be described in detail here.

[0052] like Figure 4-Figure 6 In order to further improve the reliability of the permanent magnet 110 during radial movement and guide the movement of the permanent magnet 110, a plurality of slide grooves 103 are sequentially arranged at the circumferential direction of the end of the closed end of the coupling body 100. The plurality of slide grooves 103 correspond to the plurality of permanent magnets 110 in sequence. The slide grooves 103 are arranged along the radial direction of the coupling body 100, and a slider 104 that can move therein is embedded in the slide grooves 103.

[0053] In coordination therewith, one end of the permanent magnet 110 close to the driving shaft 101 is composed of a straight surface 111 and an inclined surface 112 . The straight surface 111 is connected to the slider 104 , and the inclined surface 112 is in contact with the side inclined surface of the moving block 320 .

[0054] When the moving block 320 moves axially and cooperates with the inclined surface of the permanent magnet 110, the permanent magnet 110 moves in the sliding groove 103 through the sliding block 104 fixed thereto, so that the movement can be guided.

[0055] Embodiment 4:

[0056] This embodiment is based on the third embodiment, in order to further improve the reliability of the permanent magnet 110 when it moves radially. Figure 7 In this example, a guide groove 105 is provided on the inner wall of the coupling body 100, and a guide block 106 is provided on the outer wall of the permanent magnet 110 to cooperate therewith. The elastic component 500 is provided with an opening 107 for the guide block 106 to pass through. The guide block 106 passes through the opening 107 and is arranged in the guide groove 105. The guide groove 105 and the guide block 106 can be clearance-fitted, and the guide block 105 can move in the guide groove 105. The cooperation between the two can further improve the reliability of radial movement of the permanent magnet 110.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A conjugated double-layer magnetic coupling dynamically adjustable flexible torque output device, comprising a coupling body with a driving shaft and a conductor with a driven shaft, characterized in that: It also includes a radial adjustment component and a driving component. A plurality of evenly distributed permanent magnets are arranged around the inner circumferential wall of the coupling body. An elastic component is arranged between the permanent magnet and the inner wall of the coupling body. The plurality of elastic components support the plurality of permanent magnets. The conductor is located inside the plurality of permanent magnets and has radial gaps with the plurality of permanent magnets. The radial adjustment assembly includes a shaft sleeve and a moving block connected to the shaft sleeve, wherein the shaft sleeve is movably inserted into the driving shaft and one end of the shaft sleeve is inserted into the coupling body, a dynamic sealing structure is configured between the shaft sleeve and the coupling body, the moving block is located between a plurality of permanent magnets in the coupling body and connected to the end of the shaft sleeve, the moving block is in the shape of a truncated cone with an inclined side surface, the ends of the plurality of permanent magnets close to the driving shaft are all set as inclined surfaces adapted to the side surface of the moving block, and the plurality of permanent magnets are in contact with the inclined surface of the side surface of the moving block through the inclined surface of the end; The sleeve moves along the driving shaft toward the driven shaft and drives the moving block to move axially. The inclined surface of the moving block cooperates with the inclined surface of the permanent magnet, so that the permanent magnets can resist the elastic force of the elastic component and move relatively away radially. The shaft sleeve is moved in the opposite direction, and the elastic restoring force of the elastic component can drive the plurality of permanent magnets to be relatively close in radial direction; The driving assembly is fixed inside the driving shaft and connected to the shaft sleeve, and is used to drive the shaft sleeve to move inside the driving shaft.

2. The conjugated double-layer magnetic coupling dynamically adjustable flexible torque output device according to claim 1 is characterized in that: The coupling body is a cylindrical structure with one end open and the other end closed. The driving shaft is connected to the closed end of the coupling body. A cavity is provided inside the driving shaft. An annular groove for the sleeve to pass through is provided on the closed end of the coupling body. The sleeve can be movably inserted into the internal cavity of the driving shaft and pass through the annular groove into the coupling body. The sleeve and the annular groove adopt a dynamic sealing structure.

3. The conjugated double-layer magnetic coupling dynamically adjustable flexible torque output device according to claim 1 is characterized in that: The driving assembly comprises a driving motor, a screw rod and a threaded sleeve. The driving motor is fixed in the inner cavity of the driving shaft. The driving shaft of the driving motor is bolted to the screw rod. The threaded sleeve is threadedly connected to the screw rod and is connected to the inner wall of the sleeve.

4. The conjugated double-layer magnetic coupling dynamically adjustable flexible torque output device according to claim 1 is characterized in that: The outer wall of the sleeve is provided with a protrusion, and the inner wall of the drive shaft is provided with a groove. The protrusion is movably arranged in the groove. The movement of the protrusion in the groove can guide the movement of the sleeve relative to the drive shaft, and the setting of the protrusion and the groove can also limit the circumferential rotation of the sleeve, thereby avoiding the circumferential rotation of the sleeve relative to the drive shaft.

5. The conjugated double-layer magnetic coupling dynamically adjustable flexible torque output device according to claim 1, characterized in that: The end of the closed end of the coupling body is provided with a plurality of slide grooves in sequence in the circumferential direction, the plurality of slide grooves correspond to a plurality of permanent magnets in sequence, the slide grooves are arranged along the radial direction of the coupling body, and a sliding block is embedded in the slide groove and can move therein; One end of the permanent magnet close to the driving shaft is composed of a straight surface and an inclined surface, the straight surface is connected to the sliding block, and the inclined surface is in contact with the side inclined surface of the moving block.

6. The conjugated double-layer magnetic coupling dynamically adjustable flexible torque output device according to claim 1, characterized in that: The inner wall of the coupling body is provided with a guide groove, the outer wall of the permanent magnet is provided with a guide block, the elastic component is provided with an opening for the guide block to pass through, and the guide block passes through the opening and is arranged in the guide groove.

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