A two-stage magnetic wheel transmission device

Abstract

The invention discloses a two-stage magnetic wheel transmission device, comprising an input shaft, an inner magnetic rotor, a transition rotor, an outer magnetic stator, a modulation rotor, and an output shaft. The input shaft is connected to the inner magnetic rotor in a transmission manner. The transition rotor is composed of a yoke, a primary modulation ring, and a secondary inner magnetic ring. The outer magnetic stator is composed of an outer magnetic yoke, a primary outer magnetic ring, and a secondary outer magnetic ring. The inner magnetic rotor, the primary modulation ring, and the primary outer magnetic ring are concentrically sheathed together to form a primary magnetic wheel transmission. The secondary inner magnetic ring, the modulation rotor, and the secondary outer magnetic ring are concentrically sheathed together to form a secondary magnetic wheel transmission. The outer magnetic stator is fixed and immovable. The modulation rotor is connected to the output shaft in a transmission manner. The input shaft drives the inner magnetic rotor to rotate, and drives the transition rotor to rotate at a low speed. The transition rotor then drives the modulation rotor to rotate, and drives the output shaft to run to complete the process of secondary speed change. The two-stage magnetic wheel transmission device of the invention has a simple and compact structure, a large transmission ratio, and a large torque density, and is suitable for popularization and use.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet gears, in particular to a two-stage magnetic wheel transmission device based on the magnetic field modulation principle. Background Art

[0002] Magnetic wheel transmission is a device that uses magnetic force to achieve transmission and speed change. The transmission ratio of the magnetic wheel transmission depends on the number of magnetic poles of the inner magnetic ring and the outer magnetic ring. Theoretically, a single-stage large transmission ratio and large torque transmission can be achieved by increasing the radial size. However, due to the limitations of torque density and torque fluctuation, the transmission ratio cannot be designed to be too large, so it cannot be used in systems with large transmission ratios. Summary of the invention

[0003] The purpose of the present invention is to provide a two-stage magnetic wheel transmission device in view of the problems existing in the prior art, which solves the problems of small transmission ratio and low torque density of the existing magnetic wheel transmission, and provides a two-stage magnetic wheel transmission device with simple structure, large transmission ratio and high torque density.

[0004] The purpose of the present invention is to be solved by the following technical solutions:

[0005] A two-stage magnetic wheel transmission device comprises an input shaft, an inner magnetic rotor, a transition rotor, an outer magnetic stator, a modulation rotor, and an output shaft, wherein the input shaft is connected to the inner magnetic rotor in a transmission manner, the transition rotor is composed of a yoke, a primary modulation ring, and a secondary inner magnetic ring, the outer magnetic stator is composed of an outer magnetic yoke, a primary outer magnetic ring, and a secondary outer magnetic ring, the inner magnetic rotor, the primary modulation ring, and the primary outer magnetic ring are concentrically sheathed together to form a primary magnetic wheel transmission, the inner magnetic rotor is located in an inner cavity of the primary modulation ring and is separated by an air gap, the primary modulation ring is located in an inner cavity of the primary outer magnetic ring and is separated by an air gap, the secondary inner magnetic ring, the modulation rotor, and the secondary outer magnetic ring are concentrically sheathed together Together they form a two-stage magnetic wheel transmission, wherein the two-stage inner magnetic ring is located in the inner cavity of the modulation rotor and is separated by an air gap, the modulation rotor is located in the inner cavity of the two-stage outer magnetic ring and is separated by an air gap, the outer magnetic stator is fixed, and the modulation rotor is transmission-connected to the output shaft, and the above arrangement forms a two-stage magnetic wheel transmission device; the input shaft drives the inner magnetic rotor to rotate, and the magnetic field of the inner magnetic rotor is modulated by the first-stage modulation ring and then acts on the first-stage outer magnetic ring, thereby driving the transition rotor to rotate at a low speed, and the magnetic field of the two-stage inner magnetic ring on the transition rotor is modulated by the modulation rotor and then acts on the second-stage outer magnetic ring, thereby driving the modulation rotor to rotate, and the modulation rotor drives the output shaft to run to complete the two-stage speed change process.

[0006] The inner magnetic rotor includes an inner magnetic yoke and a primary inner magnetic ring, the magnetic pole pair number of the primary inner magnetic ring is p1, the primary modulation ring in the transition rotor is composed of a primary magnetic modulation block and a primary magnetic isolation block arranged at intervals, the number of primary magnetic modulation blocks is p3, the magnetic pole pair number of the primary outer magnetic ring in the external magnetic stator is p2, and the relationship between the magnetic pole pair number p1 of the primary inner magnetic ring, the number p3 of the primary magnetic modulation blocks and the magnetic pole pair number p2 of the primary outer magnetic ring is p3=p1+p2.

[0007] The number of magnetic pole pairs of the secondary inner magnetic ring in the transition rotor is p4, the modulation rotor is composed of a secondary modulation ring and a flange, the secondary modulation ring is composed of secondary magnetic modulation blocks and secondary magnetic isolation blocks arranged at intervals, the number of secondary magnetic modulation blocks is p6, the number of magnetic pole pairs of the secondary outer magnetic ring in the external magnetic stator is p5, and the relationship between the number of magnetic pole pairs of the secondary inner magnetic ring p4, the number of secondary magnetic modulation blocks p6 and the number of magnetic pole pairs of the secondary outer magnetic ring p5 is p6=p4+p5.

[0008] The two end surfaces of the external magnetic stator are respectively fixed to the first end cover and the second end cover, the first end cover is connected to the input shaft through the first bearing and the second bearing, one end of the input shaft passes through the first end cover, the second end cover is connected to the output shaft through the fifth bearing and the sixth bearing, and one end of the output shaft passes through the second end cover.

[0009] The transition rotor is connected to the input shaft via a third bearing and a fourth bearing.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] The present invention realizes secondary transmission by connecting two magnetic wheel transmission devices in series. The input shaft drives the inner magnetic rotor to rotate, which pushes the transition rotor to rotate at a low speed. The transition rotor then pushes the modulation rotor to rotate, which drives the output shaft to run and complete the secondary speed change process. The secondary magnetic wheel transmission device arranges the primary modulation ring in the primary magnetic wheel transmission and the secondary inner magnetic ring in the secondary magnetic wheel transmission on the same yoke iron, and has a more compact and simple structure, a large transmission ratio, a large torque density, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a structural schematic diagram of a first embodiment of a two-stage magnetic wheel transmission device of the present invention;

[0013] Attached Figure 2 For attachment Figure 1 Schematic diagram of the cross-section AA structure;

[0014] Attached Figure 3 For attachment Figure 1 Schematic diagram of the cross-section BB structure;

[0015] Attached Figure 4 It is a structural schematic diagram of the second embodiment of the two-stage magnetic wheel transmission device of the present invention.

[0016] Among them: 1 input shaft; 2 inner magnetic rotor; 2-1 inner magnetic yoke; 2-2 primary inner magnetic ring; 3 transition rotor; 3-1 yoke; 3-2 primary modulation ring; 3-21 primary magnetic modulation block; 3-22 primary magnetic isolation block; 3-3 secondary inner magnetic ring; 4 outer magnetic stator; 4-1 outer magnetic yoke; 4-2 primary outer magnetic ring; 4-3 secondary outer magnetic ring; 5 modulation rotor; 5-1 secondary modulation ring; 5-11 secondary magnetic modulation block; 5-12 secondary magnetic isolation block; 5-2 flange; 6 output shaft; 7 first end cover; 8 second end cover; 9 first bearing; 10 second bearing; 11 third bearing; 12 fourth bearing; 13 fifth bearing; 14 sixth bearing. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1-4 As shown: it includes an input shaft (1), an inner magnetic rotor (2), a transition rotor (3), an outer magnetic stator (4), a modulation rotor (5), and an output shaft (6), characterized in that: the input shaft (1) is drivingly connected to the inner magnetic rotor (2), the transition rotor (3) is composed of a yoke (3-1), a primary modulation ring (3-2) and a secondary inner magnetic ring (3-3), the outer magnetic stator (4) is composed of an outer magnetic yoke (4-1), a primary outer magnetic ring (4-2) and a secondary outer magnetic ring (4-3), the inner magnetic rotor (2), the primary modulation ring (3-2) and the primary outer magnetic ring (4-2) are concentrically sheathed together to form a primary magnetic wheel transmission The inner magnetic rotor (2) is located in the inner cavity of the first-stage modulation ring (3-2) and is separated by an air gap. The first-stage modulation ring (3-2) is located in the inner cavity of the first-stage outer magnetic ring (4-2) and is separated by an air gap. The second-stage inner magnetic ring (3-3), the modulation rotor (5) and the second-stage outer magnetic ring (4-3) are concentrically sleeved together to form a second-stage magnetic wheel transmission. The second-stage inner magnetic ring (3-3) is located in the inner cavity of the modulation rotor (5) and is separated by an air gap. The modulation rotor (5) is located in the inner cavity of the second-stage outer magnetic ring (4-3) and is separated by an air gap. The external magnetic stator (4) is fixed and the modulation rotor (5) is drivingly connected to the output shaft (6).

[0019] Specifically, with respect to the structures of the primary inner magnetic ring (2-2), the primary modulation ring (3-2) and the primary outer magnetic ring (4-2), the inner magnetic rotor (2) comprises an inner magnetic yoke (2-1) and a primary inner magnetic ring (2-2), the number of magnetic pole pairs of the primary inner magnetic ring (2-2) is p1, the primary modulation ring (3-2) in the transition rotor (3) is composed of primary magnetic modulation blocks (3-21) and primary magnetic isolation blocks (3-22) arranged in an alternating manner, the number of primary magnetic modulation blocks (3-21) is p3, the number of magnetic pole pairs of the primary outer magnetic ring (4-2) in the external magnetic stator (4) is p2, and the relationship between the number of magnetic pole pairs p1 of the primary inner magnetic ring (2-2), the number p3 of the primary magnetic modulation blocks (3-21) and the number p2 of magnetic pole pairs of the primary outer magnetic ring (4-2) is p3=p1+p2.

[0020] Specifically, with respect to the structures of the secondary inner magnetic ring (3-3), the secondary magnetic adjustment blocks (5-11) and the secondary outer magnetic ring (4-3), the number of magnetic pole pairs of the secondary inner magnetic ring (3-3) in the transition rotor (3) is p4, the modulation rotor (5) is composed of a secondary modulation ring (5-1) and a flange (5-2), the secondary modulation ring (5-1) is composed of a secondary magnetic adjustment block (5-11) and a secondary magnetic isolation block (5-12) arranged in an alternating manner, the number of the secondary magnetic adjustment blocks (5-11) is p6, the number of magnetic pole pairs of the secondary outer magnetic ring (4-3) in the external magnetic stator (4) is p5, and the relationship between the number of magnetic pole pairs p4 of the secondary inner magnetic ring (3-3), the number of the secondary magnetic adjustment blocks (5-11) p6 and the number of magnetic pole pairs p5 of the secondary outer magnetic ring (4-3) is p6=p4+p5.

[0021] Specifically, with regard to the positions of the first end cover (7) and the second end cover (8), the two end surfaces of the external magnetic stator (4) are respectively fixed to the first end cover (7) and the second end cover (8), the first end cover (7) is connected to the input shaft (1) via a first bearing (9) and a second bearing (10), one end of the input shaft (1) passes through the first end cover (7), the second end cover (8) is connected to the output shaft (6) via a fifth bearing (13) and a sixth bearing (14), and one end of the output shaft (6) passes through the second end cover (8).

[0022] Specifically, regarding the installation method of the transition rotor (3), the transition rotor (3) is connected to the input shaft (1) via a third bearing (11) and a fourth bearing (12).

[0023] Embodiment 1

[0024] Based on the above structure, Figure 1 As shown, the outer diameter of the primary modulation ring (3-2) in the transition rotor (3) is the same as the inner diameter of the secondary inner magnetic ring (3-3), the outer diameter of the secondary outer magnetic ring (4-3) in the external magnetic stator (4) is larger than the outer diameter of the primary outer magnetic ring (4-2), and the external magnetic stator (4) has a stepped structure.

[0025] Embodiment 2

[0026] Based on the above structure, Figure 4 As shown, the outer diameter of the inner magnetic rotor (2) is the same as the inner diameter of the secondary inner magnetic ring (3-3) in the transition rotor (3), the outer diameter of the primary modulation ring (3-2) in the transition rotor (3) is the same as the outer diameter of the secondary modulation ring (5-1), the outer diameter of the primary outer magnetic ring (4-2) in the external magnetic stator (4) is the same as the outer diameter of the secondary outer magnetic ring (4-3), the outer diameter of the primary modulation ring (3-2) of the transition rotor (3) is greater than the outer diameter of the secondary inner magnetic ring (3-3), and the transition rotor (3) has a stepped structure.

[0027] When the secondary magnetic wheel transmission device of the present invention is used, the input shaft (1) drives the inner magnetic rotor (2) to rotate, the magnetic field of the inner magnetic rotor (2) is modulated by the primary modulation ring (3-2) and then acts on the primary outer magnetic ring (4-2), thereby driving the transition rotor (3) to rotate at a low speed, the magnetic field of the secondary inner magnetic ring (3-3) on the transition rotor (3) is modulated by the modulation rotor (5) and then acts on the secondary outer magnetic ring (4-3), thereby driving the modulation rotor (5) to rotate, and the modulation rotor (5) drives the output shaft (6) to run to complete the secondary speed change process.

[0028] The present invention realizes a two-stage transmission by connecting two magnetic wheel transmission devices in series. The input shaft (1) drives the inner magnetic rotor (2) to rotate, and pushes the transition rotor (3) to rotate at a low speed. The transition rotor (3) then pushes the modulation rotor (5) to rotate, and drives the output shaft (6) to run to complete the two-stage speed change process. The two-stage magnetic wheel transmission device arranges the primary modulation ring (3-2) in the primary magnetic wheel transmission and the secondary inner magnetic ring (3-3) in the secondary magnetic wheel transmission on the same yoke (3-1). The structure is more compact and simple, the transmission ratio is large, the torque density is large, and it is suitable for popularization and use.

[0029] The above embodiments are only for illustrating the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention; any technology not involved in the present invention can be realized by existing technologies.

Claims

1. A two-stage magnetic wheel transmission device, comprising an input shaft (1), an inner magnetic rotor (2), a transition rotor (3), an outer magnetic stator (4), a modulation rotor (5), and an output shaft (6), characterized in that: The input shaft (1) is drivingly connected to the inner magnetic rotor (2); the transition rotor (3) is composed of a yoke (3-1), a primary modulation ring (3-2) and a secondary inner magnetic ring (3-3); the outer magnetic stator (4) is composed of an outer magnetic yoke (4-1), a primary outer magnetic ring (4-2) and a secondary outer magnetic ring (4-3); the inner magnetic rotor (2), the primary modulation ring (3-2) and the primary outer magnetic ring (4-2) are concentrically sleeved together to form a primary magnetic wheel transmission; the inner magnetic rotor (2) is located in the inner cavity of the primary modulation ring (3-2) and is separated by an air gap; the primary modulation ring (3-2) is located in the inner cavity of the primary outer magnetic ring (4-2) and is separated by an air gap; the secondary inner magnetic ring (3-3), the modulation rotor (5) and the secondary outer magnetic ring (4-3) are The two magnetic wheels are concentrically mounted together to form a secondary magnetic wheel transmission. The secondary inner magnetic ring (3-3) is located in the inner cavity of the modulation rotor (5) and is separated by an air gap. The modulation rotor (5) is located in the inner cavity of the secondary outer magnetic ring (4-3) and is separated by an air gap. The outer magnetic stator (4) is fixed and the modulation rotor (5) is transmission-connected to the output shaft (6). The above arrangement forms a secondary magnetic wheel transmission device. The input shaft (1) drives the inner magnetic rotor (2) to rotate. The magnetic field of the inner magnetic rotor (2) is modulated by the primary modulation ring (3-2) and then acts on the primary outer magnetic ring (4-2), thereby driving the transition rotor (3) to rotate at a low speed. The magnetic field of the secondary inner magnetic ring (3-3) on the transition rotor (3) is modulated by the modulation rotor (5) and then acts on the secondary outer magnetic ring (4-3). The modulation rotor (5) is driven to rotate, and the modulation rotor (5) drives the output shaft (6) to run to complete the process of secondary speed change; the inner magnetic rotor (2) comprises an inner magnetic yoke (2-1) and a primary inner magnetic ring (2-2), the magnetic pole pair number of the primary inner magnetic ring (2-2) is p1, the primary modulation ring (3-2) in the transition rotor (3) is composed of a primary magnetic modulation block (3-21) and a primary magnetic isolation block (3-22) arranged at intervals, the number of the primary magnetic modulation blocks (3-21) is p3, the magnetic pole pair number of the primary outer magnetic ring (4-2) in the external magnetic stator (4) is p2, the magnetic pole pair number of the primary inner magnetic ring (2-2) is p1, the number of the primary magnetic modulation blocks (3-21) is p3, and the magnetic pole pair number of the primary outer magnetic ring (4-2) is p2. ) The relationship between the number of magnetic poles p2 is p3=p1+p2; the number of magnetic poles of the secondary inner magnetic ring (3-3) in the transition rotor (3) is p4; the modulation rotor (5) is composed of a secondary modulation ring (5-1) and a flange (5-2); the secondary modulation ring (5-1) is composed of a secondary magnetic modulation block (5-11) and a secondary magnetic isolation block (5-12) arranged at intervals; the number of the secondary magnetic modulation blocks (5-11) is p6; the number of magnetic poles of the secondary outer magnetic ring (4-3) in the external magnetic stator (4) is p5; the relationship between the number of magnetic poles p4 of the secondary inner magnetic ring (3-3), the number of the secondary magnetic modulation blocks (5-11) p6 and the number of magnetic poles p5 of the secondary outer magnetic ring (4-3) is p6=p4+p5.

2. A two-stage magnetic wheel transmission device according to claim 1, characterized in that: The two end surfaces of the external magnetic stator (4) are respectively fixed to the first end cover (7) and the second end cover (8); the first end cover (7) is connected to the input shaft (1) via the first bearing (9) and the second bearing (10); one end of the input shaft (1) passes through the first end cover (7); the second end cover (8) is connected to the output shaft (6) via the fifth bearing (13) and the sixth bearing (14); one end of the output shaft (6) passes through the second end cover (8).

3. A two-stage magnetic wheel transmission device according to claim 1, characterized in that: The transition rotor (3) is connected to the input shaft (1) via a third bearing (11) and a fourth bearing (12).

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