Rotor assembly, motor and vehicle

Abstract

The utility model provides a rotor assembly, a motor and a vehicle, and belongs to the technical field of motors. The rotor assembly comprises a hollow shaft; the corner jig is arranged on the hollow shaft in a sleeving mode, the inner diameter of the corner jig is larger than the outer diameter of the hollow shaft, and a plurality of sets of hollow holes are formed in the corner jig in the axial direction of the hollow shaft; the plurality of hollow holes in each group of hollow holes are distributed at intervals along the circumferential direction of the hollow shaft; and the plurality of magnetic steels are respectively embedded into the hollow holes in a one-to-one correspondence manner and are fixed on the hollow shaft, so that the corner jig is fixed on the hollow shaft. The rotor assembly reduces the influence of the press-fitting iron core on the size of the hollow shaft, and improves the precision of the hollow shaft.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and particularly relates to rotor assemblies, motors and vehicles. Background Technology

[0002] In traditional rotor assemblies, the magnets are typically attached to the rotor core first, and then the rotation is achieved when the rotor core is pressed into the hollow shaft. This method greatly limits the inner diameter of the hollow shaft, and stress is generated when the rotor core is pressed into the hollow shaft, which affects the inner diameter of the hollow shaft. Utility Model Content

[0003] In view of the above-mentioned problems existing in the prior art, the purpose of this utility model embodiment is to provide a rotor assembly, a motor, and a vehicle. This rotor assembly reduces the dimensional impact of the press-fitted iron core on the hollow shaft, thereby improving the accuracy of the hollow shaft.

[0004] The technical solution adopted in this embodiment of the utility model is:

[0005] Rotor assembly, including:

[0006] Hollow shaft;

[0007] A corner fixture is fitted onto the hollow shaft. The inner diameter of the corner fixture is larger than the outer diameter of the hollow shaft. Multiple sets of hollow holes are provided on the corner fixture along the axial direction of the hollow shaft. Multiple hollow holes in each set are distributed at intervals along the circumference of the hollow shaft.

[0008] Multiple magnets are embedded into the hollow holes one by one and fixed on the hollow shaft, and the corner fixture is fixed on the hollow shaft.

[0009] In some embodiments, the magnet is in contact with the outer peripheral surface of the hollow shaft.

[0010] In some embodiments, the shape of the magnet is adapted to the shape of the hollow hole.

[0011] In some embodiments, the shape of the magnet and the shape of the hollow hole are either parallelograms or squares.

[0012] In some embodiments, the corner fixture is made of plastic.

[0013] In some embodiments, the axial distance of the corner fixture is less than or equal to the axial distance of the hollow shaft.

[0014] In some embodiments, the hollow shaft is made of a magnetically conductive material, and multiple magnets are respectively attached to the hollow shaft.

[0015] In some embodiments, the corner fixture is a cylindrical frame, and the corner fixture includes a plurality of annular rods spaced apart along the axial direction of the rotation axis and a plurality of vertical rods located between two adjacent annular rods. The plurality of vertical rods are spaced apart and respectively connected to two annular rods located at both ends, and the hollow hole is defined between two adjacent vertical rods and two annular rods located at both ends.

[0016] An electric motor comprising the rotor assembly described in any of the above embodiments.

[0017] A vehicle comprising the motor described in the above embodiments.

[0018] Compared with the prior art, the beneficial effects of the embodiments of this utility model are as follows:

[0019] The rotor assembly of this invention can be used to position multiple magnets fixed on a hollow shaft by setting a corner fixture. On the one hand, it eliminates the need for steel grooves on the hollow shaft to fix the magnets, allowing the diameter of the hollow shaft to be maximized under the same torque, and enabling better control of the thickness of the hollow shaft, thus increasing its rigidity. On the other hand, it reduces the impact of press-fitted iron cores on the dimensions of the hollow shaft, improving its accuracy.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit the present invention.

[0021] The overview of various implementations or examples of the technology described in this utility model is not a complete disclosure of the full scope or all features of the disclosed technology. Attached Figure Description

[0022] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The drawings generally illustrate various embodiments by way of example rather than limitation and, together with the description and claims, serve to explain embodiments of the utility model. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts.

[0023] Figure 1 This is a schematic diagram of the rotor assembly in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the corner fixture according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the magnet in an embodiment of this utility model.

[0026] In the diagram: 1. Hollow shaft; 2. Corner fixture; 21. Hollow hole; 22. Ring rod; 23. Vertical rod; 3. Magnet. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar words used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0029] This utility model embodiment provides a rotor assembly, such as Figures 1 to 3 As shown, the rotor assembly includes a hollow shaft 1, a corner fixture 2, and multiple magnets 3.

[0030] Angle fixture 2 is mounted on hollow shaft 1. The inner diameter of angle fixture 2 is larger than the outer diameter of hollow shaft 1, and multiple sets of hollow holes 21 are provided on angle fixture 2 along the axial direction of hollow shaft 1. The number of sets of hollow holes 21 can be three, four, five, or six, etc.

[0031] In each group of hollow holes 21, multiple hollow holes 21 are distributed at intervals along the circumference of the hollow shaft 1. The number of hollow holes 21 in each group can be three, four, or five, etc.

[0032] Multiple magnets 3 are respectively embedded into the hollow holes 21 and fixed on the hollow shaft 1, and the corner fixture 2 is fixed on the hollow shaft 1.

[0033] In this embodiment, the rotor assembly can be used to position multiple magnets 3 fixed on the hollow shaft 1 by setting the corner fixture 2. On the one hand, it eliminates the need to set steel grooves on the hollow shaft 1 for fixing the magnets 3, and allows the diameter of the hollow shaft 1 to be made as large as possible under the same torque, thus increasing the rigidity of the hollow shaft 1; on the other hand, it reduces the impact of press-fitting the iron core on the dimensions of precision components and improves the accuracy of the parts.

[0034] In some embodiments, the shape of the magnet 3 matches the shape of the hollow shaft 1. The magnet 3 is in close contact with the outer peripheral surface of the hollow shaft 1.

[0035] For example, such as Figure 3 As shown, the magnet 3 can be an arc-shaped piece that can be attached to the outer circumference of the hollow shaft 1 to control the outer diameter of the hollow shaft 1 as much as possible.

[0036] In some embodiments, the shape of the magnet 3 is adapted to the shape of the hollow hole 21. For example, the shape of the hollow hole 21 and the shape of the magnet 3 are both squares; or the shape of the hollow hole 21 and the shape of the magnet 3 are both parallelograms.

[0037] The side circumferential surface of the magnet 3 fits as closely as possible to the inner wall of the hollow hole 21. When all the magnets 3 are fixed on the outer surface of the hollow shaft 1, the entire corner fixture 2 can be fixed on the hollow shaft 1 by the cooperation of these magnets 3 with the corresponding hollow holes 21.

[0038] In this embodiment, the multiple magnets 3 may be of equal or unequal size.

[0039] In some embodiments, the corner fixture 2 can be made of plastic, thereby reducing the overall weight.

[0040] In some embodiments, the axial distance of the corner fixture 2 is less than or equal to the axial distance of the hollow shaft 1, thereby avoiding the connection of the hollow shaft 1 with other components.

[0041] In some embodiments, multiple magnets 3 are respectively attached to the hollow shaft 1. For example, the multiple magnets 3 can be fixed to the hollow shaft 1 by adhesive. The hollow shaft 1 can be made of a magnetically conductive material.

[0042] In some embodiments, the corner fixture 2 can be a cylindrical frame. For example, such as Figure 2 As shown, the corner fixture 2 may include multiple annular rods 22 spaced apart along the axial direction of the hollow shaft 1 and multiple vertical rods 23 located between two adjacent annular rods 22.

[0043] Multiple vertical rods 23 are spaced apart and connected to two annular rods 22 at both ends. A hollow hole 21 is defined between two adjacent vertical rods 23 and the two annular rods 22 at both ends. The corner fixture 2 has a simple structure.

[0044] In some embodiments, two adjacent sets of hollow holes 21 along the axial direction of the hollow shaft 1 can be staggered. For example, the center points of two adjacent sets of hollow holes 21 are not on a straight line along the axial direction of the hollow shaft 1.

[0045] In this embodiment, the corner fixture 2 can be a one-piece mechanism, such as the entire corner fixture 2 being made by 3D printing, which is convenient for processing.

[0046] Regarding the number of hollow holes 21 on the corner fixture 2 in this embodiment, this application embodiment does not make a specific limitation.

[0047] This embodiment also provides an electric motor, which includes the rotor assembly described in any of the above embodiments.

[0048] This embodiment also provides a vehicle that includes the motor described in the above embodiments.

[0049] The above description is intended to be illustrative and not restrictive. Those skilled in the art can make variations, modifications, substitutions, and alterations to the above embodiments within the scope of this disclosure. Moreover, the above examples (or one or more of them) can be used in combination with each other, and these embodiments can be combined with each other in various combinations or arrangements.

Claims

1. A rotor assembly, characterized in that, include: Hollow shaft; A corner fixture is fitted onto the hollow shaft. The inner diameter of the corner fixture is larger than the outer diameter of the hollow shaft. Multiple sets of hollow holes are provided on the corner fixture along the axial direction of the hollow shaft. In each group of hollow holes, multiple hollow holes are distributed at intervals along the circumference of the hollow shaft; Multiple magnets are embedded into the hollow holes one by one and fixed on the hollow shaft, and the corner fixture is fixed on the hollow shaft.

2. The rotor assembly as claimed in claim 1, characterized in that, The magnet is in contact with the outer circumferential surface of the hollow shaft.

3. The rotor assembly as claimed in claim 1, characterized in that, The shape of the magnet is adapted to the shape of the hollow hole.

4. The rotor assembly as claimed in claim 1, characterized in that, The shape of the magnet and the shape of the hollow hole are either parallelograms or squares, respectively.

5. The rotor assembly as claimed in claim 1, characterized in that, The corner fixture is made of plastic.

6. The rotor assembly as claimed in claim 1, characterized in that, The axial distance of the corner fixture is less than or equal to the axial distance of the hollow shaft.

7. The rotor assembly as claimed in claim 1, characterized in that, The hollow shaft is made of a magnetic material, and multiple magnets are attached to the hollow shaft.

8. The rotor assembly as claimed in claim 1, characterized in that, The corner fixture is a cylindrical frame. The corner fixture includes multiple annular rods spaced apart along the axial direction of the hollow shaft and multiple vertical rods located between two adjacent annular rods. The multiple vertical rods are spaced apart and respectively connected to two annular rods located at both ends. The hollow hole is defined between two adjacent vertical rods and two annular rods located at both ends.

9. An electric motor, characterized in that, Includes the rotor assembly as described in any one of claims 1-8.

10. A vehicle, characterized in that, Includes the motor as described in claim 9.

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