Spherical magnetic gear applying magnetism gathering type magnetism adjusting device

Abstract

The invention discloses a spherical magnetic gear applying a magnetism gathering type magnetism adjusting device. The spherical magnetic gear comprises an in-ball magnetic rotor, the spherical magnetism adjusting device and an out-ball magnetic rotor which are sequentially nested from inside to outside, the spherical outer magnetic rotor comprises an outer rotor spherical shell yoke and an outer rotor permanent magnet, and the outer rotor permanent magnet is mounted on the inner surface of the outer rotor spherical shell yoke in a facing manner; the spherical inner magnetic rotor comprises an inner rotor spherical shell yoke and an inner rotor permanent magnet, and the inner rotor permanent magnet is mounted on the outer surface of the inner rotor spherical shell yoke in a facing manner; the magnetic transmission between the ball outer magnetic rotor and the ball inner magnetic rotor is realized through the inner rotor permanent magnet and the outer rotor permanent magnet which are oppositely arranged; the spherical magnetic adjusting device is located between the spherical inner magnetic rotor and the spherical outer magnetic rotor and comprises a plurality of side sine spherical belt type magnetic adjusting pole pieces and a magnetic adjusting base, one ends of the side sine spherical belt type magnetic adjusting pole pieces are connected with the magnetic adjusting base, and all the side sine spherical belt type magnetic adjusting pole pieces are arranged along the same spherical surface and can conduct torque transmission in multiple angles. And the device adapts to various transmission scenes.

Description

Technical Field

[0001] The invention relates to the technical field of precision transmission, in particular to a spherical magnetic gear using a magnetic field focusing type magnetic adjustment device. Background Art

[0002] In the field of transmission technology, traditional gear transmission systems have long been dominant, but they have certain limitations in high-speed, high-precision and special environment applications, such as friction and wear, lubrication requirements, vibration and noise, and environmental adaptability. In order to overcome these limitations of traditional gear transmission systems, non-contact transmission technology has emerged, such as the non-contact structure of magnetic transmission.

[0003] However, the non-contact transmission structure still has some shortcomings. For example, when faced with complex transmission requirements such as multi-angle deflection, space limitations or specific angle transmission, additional mechanical structures or complex transmission systems are needed to meet these requirements, which increases the difficulty and cost of the design. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present application proposes a spherical magnetic gear using a magnetic field focusing type magnetic adjustment device. The spherical design can realize the deflection of the input end or the output end within a certain angle to transmit power, providing greater freedom of movement and flexibility. In addition, the input end and the output end can be allowed to move a certain distance in the axial direction, and the magnetic gear can also stably transmit torque.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A spherical magnetic gear using a magnetic focusing type magnetic adjustment device, comprising: a spherical inner magnetic rotor, a spherical magnetic adjustment device and a spherical outer magnetic rotor which are nested in sequence from the inside to the outside;

[0007] The spherical outer magnetic rotor comprises an outer rotor spherical shell yoke and an outer rotor permanent magnet, and the outer rotor permanent magnet is surface-mounted on the inner surface of the outer rotor spherical shell yoke;

[0008] The spherical inner magnetic rotor comprises an inner rotor spherical shell yoke and an inner rotor permanent magnet, wherein the inner rotor permanent magnet is mounted on the outer surface of the inner rotor spherical shell yoke; the inner rotor permanent magnet and the outer rotor permanent magnet are arranged opposite to each other, and magnetic force transmission between the spherical outer magnetic rotor and the spherical inner magnetic rotor is realized through the inner rotor permanent magnet and the outer rotor permanent magnet;

[0009] The spherical magnetic adjustment device is located between the inner magnetic rotor and the outer magnetic rotor, and includes a plurality of side sinusoidal spherical band-shaped magnetic adjustment pole pieces and a magnetic adjustment base. One end of the side sinusoidal spherical band-shaped magnetic adjustment pole piece is connected to the magnetic adjustment base, and all the side sinusoidal spherical band-shaped magnetic adjustment pole pieces are arranged along the same spherical surface.

[0010] Furthermore, the number of pole pairs of the inner rotor permanent magnet is P1, the number of pole pairs of the outer rotor permanent magnet is P2, and the number of the side sinusoidal spherical band-shaped magnetic adjustment pole pieces is n. s , the relationship between the three needs to satisfy: n s =P1+P2.

[0011] Furthermore, if the spherical inner rotor permanent magnets and the outer rotor permanent magnets are both equipped with a single layer, the spherical inner rotor permanent magnets and the outer rotor permanent magnets are respectively placed at the middle position of the outer surface of the inner rotor spherical shell yoke and the inner surface of the outer rotor spherical shell yoke.

[0012] Furthermore, if both the spherical inner rotor permanent magnets and the outer rotor permanent magnets are equipped with double layers or multiple layers, the spherical inner rotor permanent magnets and the outer rotor permanent magnets are arranged at equal intervals on the outer surface of the inner rotor spherical shell yoke and the inner surface of the outer rotor spherical shell yoke, respectively, and each layer of the spherical inner rotor permanent magnets and the outer rotor permanent magnets correspond one to one.

[0013] Furthermore, the two side edges of the side sinusoidal spherical band-shaped magnetic pole piece are concave curved surfaces and are designed with a 1 / 2 period sinusoidal curve.

[0014] Furthermore, the side sinusoidal spherical band-shaped magnetic tuning pole piece is made of high magnetic permeability material, and the magnetic tuning base is made of low magnetic permeability material.

[0015] Furthermore, the outer rotor spherical shell yoke is composed of two outer rotor hemispherical shells.

[0016] Furthermore, positioning keys are provided on the inner-spherical magnetic rotor and the spherical magnetic adjustment device, and the positioning keys are used to assist the assembly process in quickly positioning the concentric positions of the inner-spherical magnetic rotor, the spherical magnetic adjustment device and the outer-spherical magnetic rotor.

[0017] Furthermore, among the magnetic rotor inside the sphere and the magnetic rotor outside the sphere, one is connected to the power input end, and the other is connected to the power output end, so as to realize contactless transmission between the power input end and the power output end.

[0018] Furthermore, the magnetic rotor inside the sphere and the magnetic rotor outside the sphere are used to make a transmission connection between the coaxially arranged input end and the power output end, or to make a transmission connection between the deflectedly arranged input end and the power output end.

[0019] Beneficial effects of the present invention:

[0020] (1) In the present invention, the spherical magnetic gear utilizes the interaction between magnetic materials to achieve power transmission. Its spherical design allows power transmission at a certain angle and movement in the axial direction in three-dimensional space, thereby providing greater flexibility of movement. The non-contact transmission characteristics of this spherical gear mean that it does not produce the friction and wear in traditional gear systems, so no lubrication is required, which reduces maintenance costs and greatly improves transmission efficiency.

[0021] (2) In the present invention, in the design and operation of the high-performance spherical magnetic gear, compared with the traditional magnetic gear transmission system, the air gap magnetic field is modulated by the carefully designed unique spherical band type magnetic pole piece, so that the air gap magnetic field gathers a specific order of harmonic magnetic field in the inner and outer regions. Specifically, the order of the harmonic magnetic field in the inner and outer air gaps is equal to the number of magnetic poles of the inner and outer permanent magnet rotors. This innovative design not only enables the new spherical magnetic gear to output torque stably, but also improves the utilization rate of the permanent magnet, enhances the overall performance of the transmission system, and enables it to show excellent performance in precision transmission, high-speed operation and extreme environment applications.

[0022] (3) In the present invention, a double-layer or multi-layer permanent magnet rotor structure is adopted. The double-layer permanent magnet rotor significantly enhances the torque transmission capacity by concentrating the magnetic field, so that a larger torque can be transmitted under the same radial size. At the same time, its compact design effectively improves the space utilization rate, reduces the non-working area, and makes more effective use of the internal space of the rotor.

[0023] (4) In the present invention, since the magnetic poles of the spherical magnetic gears are distributed spherically, they can more effectively utilize limited space and achieve dense arrangement and optimized distribution of magnetic lines of force. This design enables the spherical magnetic gears to transmit greater torque while maintaining a small radial size. In contrast, traditional magnetic gears have a low utilization rate of magnetic lines of force due to the distribution of magnetic poles on a plane, and it is difficult to achieve further improvement in torque when space is limited. The efficient space utilization and torque transmission capabilities of spherical magnetic gears make them an ideal choice for miniaturized, lightweight equipment and high-performance transmission systems. In particular, spherical magnetic gears demonstrate their unique advantages in applications that require compact design and high torque output.

[0024] (5) The spherical magnetic gear designed in the present invention is not only suitable for the transmission of coaxially arranged power input ends and power output ends; it can also transmit power input ends and power output ends that are deflected at a certain angle. Therefore, the present device can be applied to more transmission scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a cross-sectional view of the overall structure of a spherical magnetic gear using a magnetic field focusing type magnetic field adjustment device according to the present invention;

[0026] Figure 2 It is a three-dimensional schematic diagram of the spherical rotor assembly;

[0027] Figure 3 It is a three-dimensional schematic diagram of a spherical magnetic tuning device;

[0028] Figure 4 This is the overall schematic diagram of the outer rotor spherical shell yoke;

[0029] Figure 5 It is the magnetization direction of the inner and outer permanent magnets and the alternating arrangement of N and S poles;

[0030] Figure 6 It is a schematic diagram of the magnetic flux path of the spherical magnetic gear;

[0031] Figure 7 This is an exploded view of a spherical magnetic gear;

[0032] Figure 8 It is a 1 / 4 three-dimensional cross-sectional view of a spherical magnetic gear;

[0033] Fig. 9 Schematic diagrams of three situations in which the spherical magnetic gear deflects, where (a), (b), and (c) are respectively diagrams of the input shaft deflection, the output shaft deflection, and the input shaft and output shaft deflection at the same time;

[0034] Fig.10 Schematic diagram of the spherical magnetic gear moving in the axial direction, where (a) and (b) are diagrams of the input shaft or output shaft moving in the axial direction, respectively.

[0035] Fig.11 It is a schematic diagram of the transmission connection of the asymmetrically arranged input shaft and output shaft of the present invention.

[0036] Figure numerals: 1. input shaft, 2. inner rotor spherical shell yoke, 3. inner rotor permanent magnet, 4. side sinusoidal spherical band-type magnetic adjustment pole piece, 5. magnetic adjustment base, 6. outer rotor permanent magnet, 7. outer rotor spherical shell yoke, 8. bolt; 9. output shaft, 10. outer rotor hemispherical shell, 11. positioning key one, 12. positioning key two. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] Combined with Figure 1-10 A spherical magnetic gear using a magnetic focusing type magnetic adjustment device is shown. The spherical magnetic gear includes an inner spherical magnetic rotor, a spherical magnetic adjustment device and an outer spherical magnetic rotor which are nested in sequence from the inside to the outside. The three are arranged concentrically. The specific structure of the three parts is as follows.

[0039] The structure of the magnetic rotor inside the ball is as follows Figure 2As shown, it includes an inner rotor spherical shell yoke 2 and an inner rotor permanent magnet 3. The inner rotor spherical shell yoke 2 is a spherical structure, and the inner rotor spherical shell yoke 2 is provided with an axial section; at least one layer of inner rotor permanent magnet 3 is mounted on the outer surface of the rotor spherical shell yoke 2, and the inner rotor permanent magnet 3 is arranged in a ring shape along the outer surface of the rotor spherical shell yoke 2. The axial section of the inner rotor spherical shell yoke 2 is used to connect with the input shaft or the output shaft to realize power transmission.

[0040] The structure of the spherical magnetic tuning device is as follows: Figure 3 As shown, it includes a plurality of side sinusoidal spherical band-shaped magnetic adjustment pole pieces 4 and a magnetic adjustment base 5. One end of the side sinusoidal spherical band-shaped magnetic adjustment pole piece 4 is fixed on the magnetic adjustment base 5. The side sinusoidal spherical band-shaped magnetic adjustment pole pieces 4 are evenly arranged along the same spherical surface and wrapped around the outside of the magnetic rotor in the sphere, and there is a gap between the two. The two side edges of the side sinusoidal spherical band-shaped magnetic adjustment pole piece 4 are concave surfaces, and a 1 / 2 period sine curve design is adopted, which can improve the magnetic adjustment effect and reduce the eddy current loss of the spherical magnetic adjustment device.

[0041] The spherical outer magnetic rotor includes an outer rotor spherical shell yoke 7 and an outer rotor permanent magnet 6. The outer rotor spherical shell yoke 7 is a semi-closed spherical structure, and the spherical inner magnetic rotor and the spherical magnetic adjustment device inside it extend from its open end to the outside. At least one layer of outer rotor permanent magnet 6 is mounted on the inner surface of the outer rotor spherical shell yoke 7, and the outer rotor permanent magnet 6 is arranged in a ring shape along the inner surface of the outer rotor spherical shell yoke 7; and the outer rotor permanent magnet 6 is arranged opposite to the inner rotor permanent magnet 3, and the outer rotor permanent magnet 6 has the same axial width as the inner rotor permanent magnet 3 and the same axial distance from the center of the ball. The connecting end of the outer rotor spherical shell yoke 7 can be connected to the input shaft or the output shaft to achieve power transmission.

[0042] In the spherical magnetic gear, the number of pole pairs of the inner rotor permanent magnet 3 is P1, the number of pole pairs of the outer rotor permanent magnet 6 is P2, and the number of the pole pairs of the inner rotor permanent magnet 3 and the outer rotor permanent magnet 6 is n. s The relationship needs to satisfy: n s =P1+P2.

[0043] In this embodiment, if both the inner spherical magnetic rotor and the outer spherical magnetic rotor are equipped with a single-layer permanent magnet ring, the permanent magnet ring is arranged in the middle position between the inner spherical magnetic rotor and the outer spherical magnetic rotor.

[0044] In this embodiment, if both the inner magnetic rotor and the outer magnetic rotor are equipped with double-layer permanent magnet rings, the permanent magnet rings need to be symmetrically distributed on the spherical surface. The double-layer permanent magnet ring can transmit higher torque and ensure the stability of operation. Similarly, three or more layers of permanent magnet rings can be used, and they can be arranged at equal intervals along the spherical surface.

[0045] In this embodiment, the inner rotor permanent magnet 3 and the outer rotor permanent magnet 6 are arranged closely and alternately with N and S poles, and radial magnetization is adopted. Other arrangements may also be adopted.

[0046] In this embodiment, the inner rotor permanent magnet 3 and the outer rotor permanent magnet 6 are made of neodymium iron boron material.

[0047] In this embodiment, the side sinusoidal spherical band type magnetic adjustment pole piece 4 is made of a material with high magnetic permeability, such as industrial pure iron and soft ferrite, etc. The magnetic adjustment base 5 is made of a material with low magnetic permeability, such as carbon steel, austenitic stainless steel, epoxy resin and special alloy.

[0048] In this embodiment, considering the size of the spherical magnetic tuning device and the convenience of assembly, the outer rotor spherical shell yoke is composed of two outer rotor hemispherical shells 10. The two outer rotor hemispherical shells 10 can be connected by means of grooves and keys on the wall, or by means of connecting ears and fasteners set on the wall to form a spherical structure.

[0049] In this embodiment, since the inner magnetic rotor, the spherical magnetic adjustment device and the outer magnetic rotor are arranged concentrically, in order to help the assembly process to quickly locate, positioning keys can be set on the inner magnetic rotor and the spherical magnetic adjustment device. For example, a positioning key 11 is provided on the shaft section of the inner rotor spherical shell yoke 2, and a positioning key 2 12 is provided on the magnetic adjustment base 5. When the positioning key 2 12 contacts the wall surface of the opening end of the outer magnetic rotor, and when the positioning key 11 contacts the edge of the magnetic adjustment base 5, it means that the inner magnetic rotor, the spherical magnetic adjustment device and the outer magnetic rotor have been arranged concentrically. The positioning keys can be removed after positioning is completed.

[0050] The following is a detailed introduction to the assembly process of this device:

[0051] First, the inner rotor permanent magnet 3 is mounted on the outer surface of the rotor spherical shell yoke 2 to form an inner spherical magnetic rotor.

[0052] The spherical magnetic adjustment device is mounted on the outside of the spherical magnetic rotor. At the same time, the positions of the spherical magnetic rotor and the spherical magnetic adjustment device are limited by means of a positioning key 11 provided on the shaft section of the inner rotor spherical shell yoke 2 to ensure that the two are concentric.

[0053] Then, the outer rotor permanent magnets 6 are respectively installed on the inner surfaces of the two outer rotor hemispherical shells 10, and then the two outer rotor hemispherical shells 10 are mounted on the outside of the spherical magnetic adjustment device and connected to form a spherical outer magnetic rotor; at the same time, the positions of the spherical magnetic adjustment device and the spherical outer magnetic rotor are limited by using the positioning keys 12 on the magnetic adjustment base 5 to ensure that the two are concentric, thereby completing the assembly of the spherical magnetic gear.

[0054] The following is a detailed introduction to the working process of this device:

[0055] Combined with Figure 1 , the shaft section of the inner magnetic rotor is connected to the input shaft 1, the end of the outer magnetic rotor opposite to the input shaft 1 is connected to the output shaft 9, the magnetic adjustment base 5 is connected to the external fixed component, and remains stationary during the working process; during the working process, the inner magnetic rotor rotates synchronously with the input shaft 1, and the magnetic force transmission between the inner rotor permanent magnet 3 and the outer rotor permanent magnet 6 drives the outer magnetic rotor and the output shaft 9 connected thereto to rotate. Similarly, the inner magnetic rotor can be connected to the output shaft 9, and the outer magnetic rotor can be connected to the input shaft 1.

[0056] Since the inner magnetic rotor, the spherical magnetic adjustment device and the outer magnetic rotor all adopt a spherical structure, the input end and the output end can deflect and transmit torque within a certain angle α during operation, and the output end can also deflect and transmit torque within an angle β. The input end and the output end can also deflect and transmit torque at the same time within a certain angle to achieve multi-angle transmission. The magnetic gear can maintain a high transmission accuracy in multi-angle transmission, such as Figure 8 shown.

[0057] In addition, the input end and the output end connected by the present invention can also move a certain distance in the axial direction, and the magnetic gear can also stably transmit torque. Fig.10 shown.

[0058] Above Figure 1-10 The spherical magnetic gear of the present invention is shown to be connected to the coaxially arranged input end and output end respectively; however, the spherical magnetic gear of the present invention can also be connected to the deflected arrangement input end and power output end, as long as the spherical inner rotor permanent magnet 3 and the outer rotor permanent magnet 6 are spatially arranged symmetrically, such as Fig.11 shown.

[0059] The above embodiments are only used to illustrate the design ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or modifications made based on the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. A spherical magnetic gear using a magnetic field focusing type magnetic adjustment device, characterized in that: include: The inner spherical magnetic rotor, the spherical magnetic adjustment device and the outer spherical magnetic rotor are nested in sequence from the inside to the outside; The spherical external magnetic rotor comprises an external rotor spherical shell yoke (7) and an external rotor permanent magnet (6), wherein the external rotor permanent magnet (6) is surface-mounted on the inner surface of the external rotor spherical shell yoke (7); The spherical inner magnetic rotor comprises an inner rotor spherical shell yoke (2) and an inner rotor permanent magnet (3), wherein the inner rotor permanent magnet (3) is mounted on the outer surface of the inner rotor spherical shell yoke (2); the inner rotor permanent magnet (3) and the outer rotor permanent magnet (6) are arranged opposite to each other, and magnetic force transmission between the spherical outer magnetic rotor and the spherical inner magnetic rotor is realized through the inner rotor permanent magnet (3) and the outer rotor permanent magnet (6); The spherical magnetic adjustment device is located between the inner magnetic rotor and the outer magnetic rotor, and comprises a plurality of side sinusoidal spherical band-shaped magnetic adjustment pole pieces (4) and a magnetic adjustment base (5). One end of the side sinusoidal spherical band-shaped magnetic adjustment pole piece (4) is connected to the magnetic adjustment base (5), and all the side sinusoidal spherical band-shaped magnetic adjustment pole pieces (4) are arranged along the same spherical surface.

2. A spherical magnetic gear using a magnetic field focusing type magnetic adjustment device according to claim 1, characterized in that: The number of pole pairs of the inner rotor permanent magnet (3) is P1, the number of pole pairs of the outer rotor permanent magnet (6) is P2, and the number of the side sinusoidal spherical band-shaped magnetic adjustment pole pieces (4) is n. s , the relationship between the three needs to satisfy: n s =P1+P2.

3. A spherical magnetic gear using a magnetic field focusing type magnetic adjustment device according to claim 1, characterized in that: If the spherical inner rotor permanent magnet (3) and the outer rotor permanent magnet (6) are both provided with a single layer, the spherical inner rotor permanent magnet (3) and the outer rotor permanent magnet (6) are respectively arranged at the middle position of the outer surface of the inner rotor spherical shell yoke (2) and the inner surface of the outer rotor spherical shell yoke (7).

4. A spherical magnetic gear using a magnetic field focusing type magnetic adjustment device according to claim 1, characterized in that: If both the spherical inner rotor permanent magnets (3) and the outer rotor permanent magnets (6) are provided with double layers or multiple layers, the spherical inner rotor permanent magnets (3) and the outer rotor permanent magnets (6) are arranged at equal intervals on the outer surface of the inner rotor spherical shell yoke (2) and the inner surface of the outer rotor spherical shell yoke (7), respectively, and each layer of the spherical inner rotor permanent magnets (3) and the outer rotor permanent magnets (6) correspond one to one.

5. The spherical magnetic gear using a magnetic field focusing type magnetic adjustment device according to claim 1, characterized in that: The two side edges of the side-edge sinusoidal spherical band-shaped magnetic adjustment pole piece (4) are concave curved surfaces and are designed with a 1 / 2 period sinusoidal curve.

6. A spherical magnetic gear using a magnetic field focusing type magnetic adjustment device according to claim 1, characterized in that: The side sinusoidal spherical band-shaped magnetic adjustment pole piece (4) is made of a high magnetic permeability material, and the magnetic adjustment base (5) is made of a low magnetic permeability material.

7. A spherical magnetic gear using a magnetic field focusing type magnetic adjustment device according to claim 1, characterized in that: The outer rotor spherical shell yoke is composed of two outer rotor hemispherical shells (10).

8. The spherical magnetic gear using a magnetic field focusing type magnetic adjustment device according to claim 1, characterized in that: Positioning keys are arranged on the inner-spherical magnetic rotor and the spherical magnetic adjustment device, and the positioning keys are used to assist the assembly process in quickly positioning the concentric positions of the inner-spherical magnetic rotor, the spherical magnetic adjustment device and the outer-spherical magnetic rotor.

9. A spherical magnetic gear using a magnetic field focusing type magnetic adjustment device according to claim 1, characterized in that: In the spherical magnetic rotor and the spherical magnetic rotor, one end is connected to the power input end, and the other end is connected to the power output end, so as to realize contactless transmission between the power input end and the power output end.

10. The spherical magnetic gear using a magnetic field focusing type magnetic adjustment device according to claim 1, characterized in that: The magnetic rotor inside the sphere and the magnetic rotor outside the sphere are used to make transmission connection between the input end and the power output end arranged along the coaxial axis, or to make transmission connection between the input end and the power output end arranged in a deflected manner.

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