Radial flux hub motor based on single-sided magnetizing injection molding of samarium iron nitrogen

Abstract

The invention discloses a radial magnetic flux hub motor based on single-sided magnetizing injection molding of samarium iron nitrogen, and the motor comprises a stator assembly which comprises a transversely-arranged mandrel and a fixed part sleeving the mandrel; the stator assembly comprises a stator part and a rotating part, the rotating part is of an annular structure, the rotating part is arranged outside the stator part in a sleeving mode, the outer portion of the stator part is arranged at the inner ring position of the rotating part, and the rotating part is arranged to be single-face magnetizing injection molding samarium iron nitrogen. The single-sided magnetizing injection molding SmFeN can be used as the structure of the rotating part, the overall weight of the motor can be reduced, a single-sided magnetizing technology is carried out on the single-sided magnetizing injection molding SmFeN, the use amount of back iron is reduced, meanwhile, the overall weight of the motor can be reduced, rotation of the rotating part is not affected, a tire arranged on the rotating part in a sleeving mode can rotate rapidly, and the service life of the motor is prolonged. While the overall weight of the motor is reduced, the rotation of the tire is not influenced.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a radial flux hub motor based on single-sided magnetized injection-molded samarium iron nitride. Background Art

[0002] Existing hub motors are mainly of the outward-rotating type, requiring a steel ring behind the magnet as a back iron to provide a path for magnetic return. This part of the magnet does not contribute to the torque of the motor and increases the weight. After single-sided magnetization, the magnetism of the magnet is concentrated on the air gap side, and there is no need for a magnetic circuit behind it. From this, it can be concluded that on the one hand, the motor output can be increased, and the weight can be further reduced without the use of a back iron. On the other hand, existing micro-mobility vehicle motors mostly use sintered NdFeB, which is a brittle material. When used as an outward-rotating motor, a structure must be added to prevent the magnet from being brittle and cracked under stress. Therefore, a radial flux hub motor based on single-sided magnetized injection-molded SmFeN is needed to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a radial flux hub motor based on single-sided magnetized injection-molded samarium iron nitride to solve the problem of excessive weight of the current overall motor.

[0004] To achieve this object, the present invention adopts the following technical solutions: A radial flux hub motor based on single-sided magnetized injection-molded samarium iron nitride, comprising: A stator assembly, comprising a transversely arranged mandrel and a stator sleeved on the outside of the mandrel; and The rotating part has a circular ring structure, is sleeved on the outside of the fixed part, and the outside of the fixed part is arranged at the inner ring of the rotating part. The rotating part is configured to be single-sided magnetized injection-molded samarium iron nitrogen.

[0005] Furthermore, the middle portion of the spindle is a cylindrical structure, bolt holes are provided at both ends of the spindle, and the fixed portion is sleeved on the cylindrical middle portion of the spindle.

[0006] Furthermore, the stator includes an iron core sleeved on the outside of the core shaft and a plurality of windings fixedly connected to the outside of the iron core.

[0007] Furthermore, the iron core is in a circular ring structure, and the plurality of windings are in a T-shaped structure. The vertical arms of the windings are connected to the outside of the iron core, and the horizontal arms of the windings are located at the inner ring of the rotating part.

[0008] Furthermore, bearings are sleeved on both sides of the outer portion of the spindle, and the two bearings are respectively located on both sides of the fixed portion.

[0009] Furthermore, the bearing includes an inner ring sleeved on the outside of the spindle and an outer ring rotatably connected to the outside of the inner ring, and balls are provided between the inner ring and the outer ring.

[0010] Furthermore, end covers are fixedly provided on the outside of the outer rings of the two bearings, and the rotating part is arranged between the two end covers.

[0011] Furthermore, one end of the two end covers close to each other protrudes to form a small frustum with a circular ring structure, and the inner ring of the small frustum is fixed on the outer ring of the bearing.

[0012] Furthermore, one end of the two end covers close to each other protrudes to form a large cone with a circular ring structure, the small cone is located in the inner ring of the large cone, and the inner ring of the rotating part is sleeved on the outer rings of the two large cones.

[0013] Furthermore, the outer rings of the rotating part and the two end covers are provided with a tire.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By using the stator assembly in conjunction with the rotor, the single-sided magnetized injection-molded samarium iron nitride can be used as the rotor structure, thereby reducing the overall weight of the motor. By performing single-sided magnetization technology on the single-sided magnetized injection-molded samarium iron nitride, the amount of back iron used can be reduced, thereby reducing the overall weight of the motor without affecting the rotation of the rotor, allowing the tire mounted on the rotor to rotate quickly, thereby reducing the overall weight of the motor without affecting the rotation of the tire.

[0015] 2. The rotating part is supported and fixed by the bearing and the end cover. While supporting and fixing the rotating part, the rotation of the rotating part is not affected. At the same time, the inner ring of the rotating part can be sleeved on the outer ring of the fixed part. After the fixed part is charged and energized, the magnetic field generated by the fixed part interacts with the magnetic field of the rotating part to generate torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and objectives that can be achieved by the present invention.

[0018] Figure 1 It is a schematic diagram of the overall front cross-section; Figure 2 It is the overall front view diagram; Figure 3 It is a schematic side cross-sectional view of the whole; Figure 4 It is a schematic diagram of the whole body.

[0019] Illustration: 1. Spindle; 2. Bearing; 3. End cover; 4. Fixed part; 5. Rotating part; 6. Tire. DETAILED DESCRIPTION

[0020] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally located component.

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0023] The embodiment of the present invention provides a radial flux hub motor based on single-sided magnetized injection molded samarium iron nitride. Figures 1-4 , including: a stator assembly and a rotor 5, the stator assembly includes a transversely arranged core shaft 1 and a stator 4 sleeved on the outside of the core shaft 1; the rotor 5 is a circular ring structure, the rotor 5 is sleeved on the outside of the stator 4, and the outside of the stator 4 is arranged at the inner ring of the rotor 5, and the rotor 5 is set to be single-sided magnetized injection-molded samarium iron nitride.

[0024] like Figures 1-4 As shown in the figure, the hub motor is based on single-sided magnetized injection-molded samarium iron nitride material and has a radial magnetic flux structure. This specific type of design combines the advantages of single-sided magnetized injection-molded samarium iron nitride material and the characteristics of the radial magnetic flux structure. It has higher magnetic properties, better efficiency and a more compact structure, which helps to improve the overall performance of the motor and meet the needs of specific application scenarios.

[0025] The spindle 1 serves as the supporting structure of the entire stator assembly and provides an installation base for the stator 4. At the same time, the lateral setting of the spindle 1 determines the overall layout and rotation axis direction of the motor. The reasonable design of the spindle 1 ensures the stability and reliability of the stator assembly, ensuring that the motor can rotate smoothly during operation and reduce vibration and noise. The stator 4 is the key part of the motor to generate a magnetic field, interacting with the rotor 5 to realize the conversion of electrical energy and mechanical energy through the principle of electromagnetic induction.

[0026] The annular structure enables the rotor 5 to rotate evenly around the stator 4, ensuring that the motor is evenly stressed during rotation and reducing additional vibration and wear caused by structural asymmetry. This sleeve relationship determines the relative position between the stator 4 and the rotor 5, which is the basis for the motor to achieve electromagnetic induction and energy conversion. The single-sided magnetized injection-molded samarium iron nitrogen material has unique magnetic properties and can provide a stable and powerful magnetic field for the motor. The injection molding process makes the manufacture of the rotor 5 more convenient and can realize the molding of complex shapes. This combination of materials and processes makes the rotor 5 have a higher magnetic energy product and coercive force, which improves the output torque of the motor. and efficiency, while reducing manufacturing costs and improving production efficiency. The single-sided magnetized injection-molded SmFeN has strength and toughness, reducing the size and weight of the structure. At the same time, the single-sided magnetized injection-molded SmFeN can be used as the structure of the rotor 5 to reduce the overall weight of the motor. Single-sided magnetization technology is performed on the single-sided magnetized injection-molded SmFeN to reduce the amount of back iron used, thereby reducing the overall weight of the motor. Unlike sintered magnets, single-sided magnetized injection-molded SmFeN has higher manufacturing flexibility and can conform to special shapes. The magnet portion of the rotor 5 in this design uses injection-molded SmFeN, and there is no need to arrange the magnets, reducing the problem of mutual repulsion of Halbach array magnets.

[0027] Operation process: When the motor is energized, the winding in the stator 4 generates a magnetic field. Due to the relative positional relationship between the stator 4 and the rotor 5, the magnetic field generated by the stator 4 interacts with the magnetic field of the rotor 5 (single-sided magnetized injection-molded samarium iron nitride). According to the principle of electromagnetic induction, this magnetic field interaction generates an electromagnetic force, causing the rotor 5 to be subjected to a torque, thereby starting to rotate around the core shaft 1. The rotation of the rotor 5 drives the load connected to it (such as the tire 6) to rotate, realizing the conversion of electrical energy into mechanical energy. During the operation of the motor, the bearing 2 plays a role in supporting and reducing friction, ensuring that the rotor 5 can rotate smoothly and stably.

[0028] See also Figure 1 The middle part of the mandrel 1 is a cylindrical structure, bolt holes are opened at both ends of the mandrel 1, and the fixed part 4 is sleeved on the cylindrical middle part of the mandrel 1.

[0029] like Figure 1As shown, the cylindrical structure provides a stable and regular installation base for the fixed part 4.

[0030] The bolt holes provide convenience for the installation and fixation of the motor. By passing fasteners such as bolts through the bolt holes, the spindle 1 and the entire motor can be firmly installed in the required position to ensure that the motor will not be displaced or loosened during operation.

[0031] The stator 4 is sleeved on the cylindrical middle part of the core shaft 1, so that the relative position between the stator 4 and the rotor 5 is more reasonable, which is conducive to the coupling of the magnetic field and the transfer of energy. This layout can ensure that during the operation of the motor, the electromagnetic force between the stator 4 and the rotor 5 can be effectively converted into torque to drive the rotor 5 to rotate.

[0032] Please continue reading Figure 1 The stator 4 includes an iron core sleeved on the outside of the core shaft 1 and multiple windings fixedly connected to the outside of the iron core. The iron core has a circular ring structure, and the multiple windings are all T-shaped structures. The vertical arm of the winding is connected to the outside of the iron core, and the horizontal arm of the winding is located at the inner ring of the rotating part 5.

[0033] like Figure 1 As shown, the iron core is the core supporting structure of the stator 4, providing an installation base for the winding. At the same time, it can enhance the conduction capacity of the magnetic field. The high magnetic permeability of the iron core enables the magnetic field to be more effectively concentrated inside the motor, thereby improving the utilization rate of the magnetic field.

[0034] The winding is a key component for generating a magnetic field in the motor. When current passes through the winding, a magnetic field is generated, which interacts with the magnetic field of the rotor 5 to realize the conversion of electrical energy into mechanical energy. The setting of multiple windings can flexibly control the strength and direction of the magnetic field to meet different working requirements.

[0035] The ring structure enables the iron core to be evenly distributed around the core shaft 1, providing a symmetrical installation environment for the winding. This symmetry helps to ensure the uniform distribution of the magnetic field inside the motor and reduce the impact of magnetic field imbalance on motor performance.

[0036] The T-shaped winding design offers unique advantages. The vertical arm connects to the outside of the core, ensuring good electrical and mechanical contact between the winding and the core, improving current conduction efficiency and structural stability. The horizontal arm is located within the inner ring of the rotor 5, allowing the magnetic field generated by the winding to interact more directly with the magnetic field of the rotor 5, enhancing electromagnetic coupling efficiency.

[0037] The vertical arm of the winding is connected to the outside of the iron core, and the horizontal arm is located at the inner ring of the rotor 5. This connection method and positional relationship determine the relative position between the winding, the iron core, and the rotor 5, and is the key to the motor's electromagnetic induction and energy conversion. Reasonable connection and positional relationship ensures effective coupling of the magnetic field, enabling the motor to efficiently convert electrical energy into mechanical energy.

[0038] See also Figure 1 and Figure 4 Bearings 2 are sleeved on both sides of the outside of the main shaft 1. The two bearings 2 are located on both sides of the fixed part 4. The bearings 2 include an inner ring sleeved on the outside of the main shaft 1 and an outer ring rotatably connected to the outside of the inner ring. Balls are provided between the inner ring and the outer ring.

[0039] like Figure 1 and Figure 4 As shown, the bearing 2 provides stable support for the spindle 1 and the rotor 5, allowing the rotor 5 to rotate with minimal friction. The inner ring of the bearing 2 fits tightly with the spindle 1, transmitting the rotational motion of the spindle 1 to the bearing 2 system. It bears the radial and axial loads of the spindle 1, ensuring that the rotor 5 rotates smoothly in the bearing 2. The outer ring is fixedly connected to subsequent components such as the end cover 3, providing a fixed support point for the entire bearing 2 system. Relative rotation is achieved between it and the inner ring through balls, allowing the rotor 5 to rotate freely relative to the inner ring.

[0040] The balls play a role of rolling friction between the inner ring and the outer ring, converting the sliding friction between the inner ring and the outer ring into rolling friction, which greatly reduces the friction resistance. At the same time, the balls can also withstand a certain load to ensure the relative position between the inner ring and the outer ring is stable.

[0041] See also Figures 1-4 The outer sides of the two bearings 2 are fixed with end covers 3, and the rotating part 5 is arranged between the two end covers 3. The ends of the two end covers 3 that are close to each other protrude to form a small frustum with a circular ring structure. The inner ring of the small frustum is fixed on the outer ring of the bearing 2, and the ends of the two end covers 3 that are close to each other protrude to form a large frustum with a circular ring structure. The small frustum is located inside the inner ring of the large frustum, and the inner ring of the rotating part 5 is sleeved on the outer rings of the two large frustums.

[0042] like Figures 1-4 As shown, an end cover 3 is fixed to the outside of the outer ring of the bearing 2. The end cover 3 provides additional support for the entire hub motor structure, can withstand part of the force generated when the rotor 5 rotates, reduce the direct pressure on the bearing 2, and prevent external impurities such as dust and moisture from entering the interior of the motor, protecting the bearing 2 and other internal components from damage. The rotor 5 is arranged between the two end covers 3, which clarifies the installation position of the rotor 5 and limits the axial movement range of the rotor 5, ensuring that the rotor 5 is always in the correct position during rotation, avoiding collision with the stator 4 or other components due to position offset, which affects the normal operation of the motor.

[0043] The ends of the end covers 3 that are close to each other protrude to form a small cone, and the inner ring of the small cone is fixed on the outer ring of the bearing 2, which increases the contact area and connection strength between the end cover 3 and the bearing 2, so that the end cover 3 can be more firmly fixed on the bearing 2, thereby improving the stability of the entire structure. The small cone can play a positioning role for the bearing 2, preventing the bearing 2 from axial movement during operation, ensuring that the bearing 2 operates in the correct position, and reducing motor failures caused by the movement of the bearing 2.

[0044] The ends of the end covers 3 that are close to each other protrude to form a large cone, and the small cone is located inside the inner ring of the large cone. The inner ring of the rotating part 5 is sleeved on the outer rings of the two large cones. The large cone provides a stable installation and support platform for the rotating part 5, so that the rotating part 5 can be evenly stressed and reduce shaking and vibration during rotation. The outer ring of the large cone plays a radial positioning and guiding role for the rotating part 5, ensuring that the rotating part 5 always maintains the correct radial position during rotation, avoiding motor performance degradation or failure due to radial offset.

[0045] Please continue reading Figures 1-4 A tire 6 is provided on the outer ring of the rotating part 5 and the two end covers 3.

[0046] like Figures 1-4 As shown, the outermost ring of the rotor 5 is provided with a tire 6 to ensure that the rotor 5 is wrapped and protected during the rotation process.

[0047] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A radial flux hub motor based on single-sided magnetized injection molded samarium iron nitride, characterized in that: include: A stator assembly comprising a transversely arranged mandrel (1) and a stator portion (4) sleeved on the outside of the mandrel (1); and The rotating part (5) is in a circular ring structure, the rotating part (5) is sleeved on the outside of the fixed part (4), the outside of the fixed part (4) is arranged at the inner ring of the rotating part (5), and the rotating part (5) is configured to be single-sided magnetized injection-molded samarium iron nitrogen.

2. The radial flux hub motor based on single-sided magnetized injection molded samarium iron nitride according to claim 1, characterized in that: The middle portion of the spindle (1) is a cylindrical structure, bolt holes are provided at both ends of the spindle (1), and the fixed portion (4) is sleeved on the cylindrical middle portion of the spindle (1).

3. The radial flux hub motor based on single-sided magnetized injection molded samarium iron nitride according to claim 1, characterized in that: The stator (4) comprises an iron core sleeved on the outside of the core shaft (1) and a plurality of windings fixedly connected to the outside of the iron core.

4. The radial flux hub motor based on single-sided magnetized injection molded samarium iron nitride according to claim 3, characterized in that: The iron core is in a circular ring structure, and the plurality of windings are in a T-shaped structure. The vertical arms of the windings are connected to the outside of the iron core, and the horizontal arms of the windings are located at the inner ring of the rotating part (5).

5. The radial flux hub motor based on single-sided magnetized injection molded samarium iron nitride according to claim 1, characterized in that: Bearings (2) are sleeved on both sides of the exterior of the spindle (1), and the two bearings (2) are respectively located on both sides of the fixed portion (4).

6. The radial flux hub motor based on single-sided magnetized injection molded samarium iron nitride according to claim 5, characterized in that: The bearing (2) comprises an inner ring sleeved on the outside of the spindle (1) and an outer ring rotatably connected to the outside of the inner ring, with balls being provided between the inner ring and the outer ring.

7. The radial flux hub motor based on single-sided magnetized injection molded samarium iron nitride according to claim 6, characterized in that: End covers (3) are fixedly provided on the outside of the outer rings of the two bearings (2), and the rotating part (5) is arranged between the two end covers (3).

8. The radial flux hub motor based on single-sided magnetized injection molded samarium iron nitride according to claim 7, characterized in that: One end of the two end covers (3) that is close to each other protrudes to form a small frustum with a circular ring structure, and the inner ring of the small frustum is fixed on the outer ring of the bearing (2).

9. The radial flux hub motor based on single-sided magnetized injection molded samarium iron nitride according to claim 8, characterized in that: The ends of the two end covers (3) that are close to each other protrude to form a large cone with a circular ring structure, the small cone is located inside the inner ring of the large cone, and the inner ring of the rotating part (5) is sleeved on the outer rings of the two large cones.

10. The radial flux hub motor based on single-sided magnetized injection molded samarium iron nitride according to claim 9, characterized in that: The outer rings of the rotating portion (5) and the two end covers (3) are provided with a tire (6).

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