A permanent magnet transmission

Abstract

The present invention discloses a permanent magnet transmission, which includes a conductor rotor, a permanent magnet rotor, a torque disk, a movable pin shaft, a bearing, and a sliding pin shaft. One end of the sliding pin shaft is fixed on the torque disk, and the other end passes through the flange of the permanent magnet rotor, and the permanent magnet rotor can move along the sliding pin shaft; one end of the movable pin shaft is fixed to the torque disk through a bearing, and the other end passes through the flange of the permanent magnet rotor; a thread is provided on the outer circumferential surface of the movable pin shaft and is matched with the flange. When it is necessary to increase the output torque, the movable pin shaft is rotated, and the permanent magnet rotor axially moves closer to the conductor rotor, and the meshing area between the permanent magnet rotor and the conductor rotor increases, and the output torque increases; when it is necessary to decrease the output torque, the movable pin shaft is rotated in the reverse direction, and the permanent magnet rotor axially moves away from the conductor rotor, and the meshing area between the permanent magnet rotor and the conductor rotor decreases, and the output torque decreases. The present invention can quickly adjust the meshing area between the conductor rotor and the permanent magnet rotor in an offline state, without increasing the complexity of the structure, without affecting the centering, and has simple operation.

Description

Technical Field

[0001] The present invention relates to a permanent magnet transmission, and more particularly to a permanent magnet coupler capable of off-line speed change. Background Art

[0002] At present, the structure of the traditional permanent magnet coupler consists of two parts: a conductor rotor assembly and a permanent magnet rotor assembly. The structure is simple and can achieve constant-speed transmission. However, when the system working conditions need to be changed and the speed ratio needs to be adjusted, in order to change the meshing area between the permanent magnet rotor and the conductor rotor, the following methods are adopted: (1) Move the motor, and drive the conductor rotor to move through the motor to achieve the purpose; (2) Disassemble and reassemble the permanent magnet coupler. The above methods all have certain defects. When moving the motor, it is impossible to ensure the centering of the permanent magnet rotor and the conductor rotor, and operation errors will cause the adsorption phenomenon between the permanent magnet rotor and the conductor rotor, resulting in greater installation difficulty and workload. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to propose a permanent magnet transmission that can quickly adjust the meshing area in an off-line state and achieve speed change, aiming at the above-mentioned disadvantages of the prior art.

[0004] In order to solve the above technical problem, the technical solution of the present invention is realized in the following way:

[0005] A permanent magnet transmission includes a conductor rotor, a permanent magnet rotor, a torque disc, a locking nut, a moving pin, a bearing, and a sliding pin. The permanent magnet rotor is concentrically sleeved inside the conductor rotor, and there is a gap between the conductor rotor and the permanent magnet rotor; the torque disc is arranged between the conductor rotor and the permanent magnet rotor, is concentrically installed with the permanent magnet rotor, and is connected to the permanent magnet rotor through the moving pin and the sliding pin; the conductor rotor is installed on the input shaft through flange A and expansion sleeve A, the torque disc is installed on the output shaft through flange B and expansion sleeve B, and the permanent magnet rotor is floatingly sleeved on the outer ring of flange B; during operation, the input shaft transmits torque to the conductor rotor through flange A and expansion sleeve A, the conductor rotor transmits torque to the permanent magnet rotor by means of magnetic field coupling, the permanent magnet rotor transmits torque to the torque disc through the sliding pin, and the torque disc transmits torque to the output shaft through flange B and expansion sleeve B, thus completing the process of power transmission.

[0006] Through the technical solution of the present invention, one end of the sliding pin shaft is fixed on the torque disc, and the other end passes through the flange of the permanent magnet rotor. The permanent magnet rotor can axially move along the sliding pin shaft. The sliding pin shaft plays a role in guiding and transmitting torque. One end of the moving pin shaft is fixed to the torque disc through a bearing, and the other end passes through the flange of the permanent magnet rotor. There is a thread on the outer circumferential surface of the moving pin shaft, which is in threaded cooperation with the flange. When it is necessary to increase the output torque, the moving pin shaft is rotated. Under the push of the thread, the permanent magnet rotor axially moves closer to the conductor rotor, the meshing area between the permanent magnet rotor and the conductor rotor increases, and the transmitted torque increases. When it is necessary to reduce the output torque, the moving pin shaft is rotated in the reverse direction, and the permanent magnet rotor axially moves away from the conductor rotor under the action of the thread, the meshing area between the permanent magnet rotor and the conductor rotor decreases, and the transmitted torque decreases.

[0007] The further limited technical solution of the present invention is:

[0008] For the aforementioned permanent magnet transmission, a locking nut is provided on the side A of the flange. When adjusting the permanent magnet rotor to a certain position, the locking nut is tightened and tightly fits against the side A of the flange, firmly fixing the permanent magnet rotor in the current position.

[0009] For the aforementioned permanent magnet transmission, the moving pin shafts are evenly distributed in a circular ring on the torque disc, and the number is not less than 2.

[0010] For the aforementioned permanent magnet transmission, the sliding pin shafts are evenly distributed in a circular ring on the torque disc, and the number is not less than 2.

[0011] For the aforementioned permanent magnet transmission, a spring can also be provided between the side of the torque disc and the side B of the flange. The spring generates an axial elastic force on the flange. Threads are provided on the outer circumferential surface of the flange B, and the locking nut is in threaded cooperation with the threads on the outer circumferential surface. The spring and the locking nut jointly act to fix the permanent magnet rotor at a certain axial position. When it is necessary to increase the output torque, the locking nut is tightened, and the permanent magnet rotor axially moves closer to the conductor rotor under the push of the locking nut, the meshing area between the permanent magnet rotor and the conductor rotor increases, and the transmitted torque increases. When it is necessary to reduce the output torque, the locking nut is loosened, and the permanent magnet rotor axially moves away from the conductor rotor under the action of the spring, the meshing area between the permanent magnet rotor and the conductor rotor decreases, and the transmitted torque decreases.

[0012] For the aforementioned permanent magnet transmission, the springs are evenly distributed in a circular ring between the torque disc and the flange of the permanent magnet rotor, the number is not less than 2, and the specifications and lengths are the same.

[0013] For the aforementioned permanent magnet transmission, within the range of 0 to 100% of the meshing area between the conductor rotor and the permanent magnet rotor, the spring is always in a compressed state.

[0014] The beneficial effects of the present invention are as follows: The permanent magnet rotor transmits torque to the torque disc through the sliding pin shaft, and the torque disc then transmits the torque to the output shaft. The permanent magnet rotor is floatingly mounted on the output shaft and can move axially. The axial position of the permanent magnet rotor is adjusted by a thread, thereby changing the meshing area with the conductor rotor and adjusting the magnitude of the transmitted torque. This technical solution realizes the rapid adjustment of the meshing area between the conductor rotor and the permanent magnet rotor in an offline state, without the need to adjust by moving the motor or disassembling the equipment like a permanent magnet coupler, without the need for re-centering, with less workload, and without the complex adjustment mechanism of a permanent magnet speed regulator, without increasing the structural complexity, having a simple structure, no vulnerable parts, and high reliability. Brief Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention;

[0016] Figure 2 It is a schematic structural diagram when the conductor rotor and the permanent magnet rotor are offset in Embodiment 1;

[0017] Figure 3 It is a schematic structural diagram of the conductor rotor in Embodiment 1;

[0018] Figure 4 It is a schematic structural diagram of the permanent magnet rotor and the torque disc in Embodiment 1;

[0019] Figure 5 It is a schematic structural diagram of Embodiment 2 of the present invention;

[0020] Figure 6 It is a schematic structural diagram when the conductor rotor and the permanent magnet rotor are offset in Embodiment 2;

[0021] Figure 7 It is a schematic structural diagram of the permanent magnet rotor and the torque disc in Embodiment 2;

[0022] Wherein: 1 - conductor rotor; 2 - permanent magnet rotor; 3 - torque disc; 3 - 1 - torque disc side; 4 - moving pin shaft; 4 - 1 - outer circumferential surface of the moving pin shaft; 5 - bearing; 6 - sliding pin shaft; 7 - flange; 7 - 1 - flange side A; 7 - 2 - flange thread; 7 - 3 - flange side B; 8 - locking nut; 9 - flange A; 10 - expansion sleeve A; 11 - input shaft; 12 - flange B; 12 - 1 - outer circumferential surface of flange B; 13 - expansion sleeve B; 14 - output shaft; 15 - spring. Detailed Embodiment

[0023] The following further elaborates on the present invention in detail:

[0024] Embodiment 1

[0025] A permanent magnet transmission provided in this embodiment includes a conductor rotor (1), a permanent magnet rotor (2), a torque disk (3), a movable pin (4), a bearing (5), and a sliding pin (6). The permanent magnet rotor (2) is concentrically sleeved inside the conductor rotor (1), and there is a gap between the conductor rotor (1) and the permanent magnet rotor (2). The torque disk (3) is arranged between the conductor rotor (1) and the permanent magnet rotor (2), is concentrically installed with the permanent magnet rotor (2), and is connected to the permanent magnet rotor (2) through the movable pin (4) and the sliding pin (6). The conductor rotor (1) is installed on the input shaft (11) through a flange A (9) and a expansion sleeve A (10), and the torque disk (3) is installed on the output shaft (14) through a flange B (12) and a expansion sleeve B (13). The permanent magnet rotor (2) is floatingly sleeved on the outer ring (12-1) of the flange B (12). During operation, the input shaft (11) transmits torque to the conductor rotor (1) through the flange A (9) and the expansion sleeve A (10). The conductor rotor (1) transmits the torque to the permanent magnet rotor (2) by using the magnetic field coupling effect. The permanent magnet rotor (2) transmits the torque to the torque disk (3) through the sliding pin (6). The torque disk (3) transmits the torque to the output shaft (14) through the flange B (12) and the expansion sleeve B (13), thus completing the power transmission process. One end of the sliding pin (6) is fixed on the torque disk (3), and the other end passes through the flange plate (7) of the permanent magnet rotor (2). The permanent magnet rotor (2) can axially move along the sliding pin (6). The sliding pin (6) plays a role in guiding and transmitting torque. One end of the movable pin (4) is fixed to the torque disk (3) through the bearing (5), and the other end passes through the flange plate (7) of the permanent magnet rotor (2). There is a thread on the outer circumferential surface (4-1) of the movable pin, which cooperates with the flange plate thread (7-2). When it is necessary to increase the output torque, the movable pin (4) is rotated. The permanent magnet rotor (2) axially moves closer to the conductor rotor (1) under the push of the thread, and the meshing area between the permanent magnet rotor (2) and the conductor rotor (1) increases, and the transmitted torque increases. When it is necessary to reduce the output torque, the movable pin (4) is rotated in the reverse direction. The permanent magnet rotor (2) axially moves away from the conductor rotor (1) under the action of the thread, and the meshing area between the permanent magnet rotor (2) and the conductor rotor (1) decreases, and the transmitted torque decreases. A locking nut (8) is provided on the side surface A (8-1) of the flange plate. When the permanent magnet rotor (2) is adjusted to a certain position, the locking nut (8) is tightened and closely fits with the side surface A (8-1) of the flange plate, firmly fixing the permanent magnet rotor (2) in the current position. Two movable pins (4) are symmetrically distributed on the torque disk (3), and two sliding pins (6) are symmetrically distributed on the torque disk (3).

[0026] Embodiment 2

[0027] A permanent magnet transmission provided in this embodiment includes a conductor rotor (1), a permanent magnet rotor (2), a torque disc (3), sliding pin shafts (6), lock nuts (8), and springs (15). A spring (15) is provided between the side surface (3-1) of the torque disc and the side surface B (7-3) of the flange disc, and the spring (15) generates an axial elastic force on the flange disc (7); threads are provided on the outer circumferential surface (12-1) of the flange B (12), and the lock nut (8) is engaged with the threads on the outer circumferential surface (12-1); the spring (15) and the lock nut (8) jointly act to fix the permanent magnet rotor (2) at a certain axial position; when it is necessary to increase the output torque, the lock nut (8) is tightened, and then the permanent magnet rotor (2) axially moves closer to the conductor rotor (1) under the push of the lock nut (8), the meshing area between the permanent magnet rotor (2) and the conductor rotor (1) increases, and the transmitted torque increases; when it is necessary to reduce the output torque, the lock nut (8) is loosened, and then the permanent magnet rotor (2) axially moves away from the conductor rotor (1) under the action of the spring (15), the meshing area between the permanent magnet rotor (2) and the conductor rotor (1) decreases, and the transmitted torque decreases. Three springs (15) are evenly distributed in a circular ring between the torque disc (3) and the permanent magnet rotor flange disc (7), and have the same specifications and lengths. The conductor rotor (1) and the permanent magnet rotor are evenly distributed in a circular ring on the torque disc (3).

[0028] The above embodiments are only used to illustrate the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the present invention.

Claims

1. A permanent magnet transmission, comprising a conductor rotor (1), a permanent magnet rotor (2), a torque disc (3), a movable pin shaft (4), a bearing (5), and a sliding pin shaft (6). The permanent magnet rotor (2) is concentrically sleeved inside the conductor rotor (1), and there is a gap between the conductor rotor (1) and the permanent magnet rotor (2). The torque disc (3) is arranged between the conductor rotor (1) and the permanent magnet rotor (2), is concentrically installed with the permanent magnet rotor (2), and is connected to the permanent magnet rotor (2) through the movable pin shaft (4) and the sliding pin shaft (6). The conductor rotor (1) is installed on the input shaft (11) through a flange A (9) and a expansion sleeve A (10). The torque disc (3) is installed on the output shaft (14) through a flange B (12) and a expansion sleeve B (13). The permanent magnet rotor (2) is floatingly sleeved on the outer circumferential surface (12-1) of the flange B. During operation, the input shaft (11) transmits torque to the conductor rotor (1) through the flange A (9) and the expansion sleeve A (10). The conductor rotor (1) transmits torque to the permanent magnet rotor (2) by using the magnetic field coupling effect. The permanent magnet rotor (2) transmits torque to the torque disc (3) through the sliding pin shaft (6). The torque disc (3) transmits torque to the output shaft (14) through the flange B (12) and the expansion sleeve B (13), thus completing the process of power transmission. It is characterized in that: One end of the sliding pin shaft (6) is fixed on the torque disc (3), and the other end passes through the flange disc (7) of the permanent magnet rotor (2). The permanent magnet rotor (2) can axially move along the sliding pin shaft (6). The sliding pin shaft (6) plays a role in guiding and transmitting torque. One end of the movable pin shaft (4) is fixed to the torque disc (3) through the bearing (5), and the other end passes through the flange disc (7) of the permanent magnet rotor (2). A thread is provided on the outer circumferential surface (4-1) of the movable pin shaft (4) of the movable pin shaft (4), which is matched with the flange disc thread (7-2). When it is necessary to increase the output torque, the movable pin shaft (4) is rotated. The permanent magnet rotor (2) axially moves closer to the conductor rotor (1) under the push of the thread, and the meshing area between the permanent magnet rotor (2) and the conductor rotor (1) increases, and the transmitted torque increases. When it is necessary to reduce the output torque, the movable pin shaft (4) is rotated in the reverse direction, and the permanent magnet rotor (2) axially moves away from the conductor rotor (1) under the action of the thread, and the meshing area between the permanent magnet rotor (2) and the conductor rotor (1) decreases, and the transmitted torque decreases.

2. The permanent magnet transmission according to claim 1, wherein: A locking nut (8) is provided on the flange disc side A (7-1) of the flange disc (7). The locking nut (8) is attached to the flange disc side A (7-1) to fix the permanent magnet rotor (2).

3. The permanent magnet transmission according to claim 1, characterized in that: The movable pin shafts (4) are evenly distributed on the torque disc (3) in a circular ring shape, and the number is not less than 2.

4. The permanent magnet transmission according to claim 1, wherein: The sliding pin shafts (6) are evenly distributed on the torque disc (3) in a circular ring shape, and the number is not less than 2.

5. The permanent magnet transmission according to claim 1, characterized in that: A spring (15) is provided between the side surface (3-1) of the torque disk and the side surface B (7-3) of the flange disk, and the spring (15) generates an axial elastic force on the flange disk (7); threads are provided on the outer circumferential surface (12-1) of flange B, and the locking nut (8) is engaged with the threads on the outer circumferential surface (12-1) of flange B; the spring (15) and the locking nut (8) act together to fix the permanent magnet rotor (2) at a certain axial position.

6. The permanent magnet transmission according to claim 5, wherein: The springs (15) are uniformly distributed in an annular shape between the torque disk (3) and the permanent magnet rotor flange disk (7), the number is not less than 2, and the specifications and lengths are the same.

7. The permanent magnet transmission according to claim 5, wherein: Within the range of 0 to 100% of the meshing area between the conductor rotor (1) and the permanent magnet rotor (2), the spring (15) is always in a compressed state.

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