Rotor skeleton, rotor assembly and axial field motor

Abstract

The utility model belongs to motor technical field discloses a kind of rotor framework, rotor assembly and axial magnetic field motor.The rotor framework includes disc body, and the opposite sides of disc body are respectively provided with multiple reinforcing ribs, and multiple reinforcing ribs of each side are respectively evenly arranged along the circumferential direction of disc body, and the accommodating groove is formed between the adjacent two reinforcing ribs of the same side, and pressing plate is accommodated in each accommodating groove one by one.The rotor framework provided in the embodiment can increase the axial stiffness of the overall rotor framework by arranging the reinforcing ribs extending in the radial direction on both sides of the disc body, thereby significantly increasing the axial stiffness of the rotor assembly.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a rotor frame, rotor assembly and axial magnetic field motor. Background Technology

[0002] Axial field motors, also known as disc motors, have advantages such as small axial dimensions, high torque density, high power density, and high efficiency, and are widely used in electric vehicles, general industrial applications, and household appliances. Axial field motors consist of a stator assembly and a rotor assembly. Existing rotor assemblies typically include three main components: a cage, magnets, and retaining rings. The cage is available in two types: pure composite (such as fiberglass composite) and composite-plus-stainless steel. The composite-plus-stainless steel method uses a metal sheet as the main load-bearing component, covered with a composite material to form a single cage. Previously, the metal sheet was thin, resulting in relatively weak axial stiffness of the rotor assembly.

[0003] Therefore, there is an urgent need to provide a rotor frame, rotor assembly, and axial magnetic field motor to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a rotor frame, rotor assembly, and axial magnetic field motor that can significantly increase the axial stiffness of the rotor assembly.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A rotor frame includes a disc body, on which multiple reinforcing ribs are provided on opposite sides. The multiple reinforcing ribs on each side are evenly spaced along the circumference of the disc body. A receiving groove is formed between two adjacent reinforcing ribs on the same side for receiving a pressure plate.

[0007] As an optional solution, the reinforcing ribs located on both sides of the disc body are positioned in a one-to-one correspondence.

[0008] As an optional solution, a shaft hole is provided at the center of the disc body, and the rotor frame also includes an inner convex ring arranged around the shaft hole. The inner convex ring protrudes axially on opposite sides of the disc body, and the inner convex ring is connected to the end of each of the reinforcing ribs.

[0009] As an alternative, the rotor frame is a one-piece molded metal part.

[0010] A rotor assembly includes a plurality of magnets, a plurality of pressure plates, and the aforementioned rotor frame, wherein the pressure plates are respectively housed in the respective receiving slots, and each magnet is embedded in the corresponding pressure plate and the disc body.

[0011] As an optional solution, a first slot is provided on the disc body, and a second slot is provided on each of the pressure plates. The second slot and the first slot are stacked to form a limiting groove, which is used to embed the magnet.

[0012] As an optional solution, the receiving groove is a fan-shaped groove, and the outer contour of the pressure plate is configured to be a fan shape that matches the receiving groove;

[0013] And / or, the magnet has a fan-shaped structure, and the limiting groove is a fan-shaped groove.

[0014] As an optional solution, the rotor assembly further includes a limiting ring, which is fitted onto the outer periphery of the rotor frame and the magnet.

[0015] As an optional solution, the limiting ring is made of carbon fiber material;

[0016] And / or, the pressure plate is made of plastic or fiberglass composite material.

[0017] An axial magnetic field motor includes at least one stator assembly and at least one rotor assembly as described above, the rotor assembly and the stator assembly being alternately distributed along the axial direction.

[0018] The beneficial effects of this utility model are:

[0019] This invention provides a rotor frame, a rotor assembly, and an axial magnetic field motor. The rotor frame includes a disc body, with multiple reinforcing ribs arranged on opposite sides of the disc body. The reinforcing ribs extend radially along the disc body, and the multiple reinforcing ribs on each side are evenly spaced along the circumference of the disc body. A receiving groove for accommodating a pressure plate is formed between two adjacent reinforcing ribs on the same side. By arranging radially extending reinforcing ribs on both sides of the disc body, the overall axial stiffness of the rotor frame can be increased, thereby significantly increasing the axial stiffness of the rotor assembly. Attached Figure Description

[0020] To more clearly and understandably illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the rotor frame provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the rotor assembly provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the arrangement of multiple pressure plates provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the pressure plate and rotor frame provided in this embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the magnet, pressure plate and rotor frame provided in the embodiment of this utility model.

[0026] In the picture:

[0027] 100. Rotor assembly; 10. Rotor frame; 11. Disc; 12. Reinforcing rib; 13. Receiving groove; 14. Inner convex ring; 15. First slot; 20. Pressure plate; 21. Second slot; 30. Magnet; 40. Limiting ring; 50. Limiting groove. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 and Figure 2 As shown, this embodiment provides a rotor frame 10 and a rotor assembly 100. The rotor assembly 100 includes a plurality of magnets 30, a plurality of pressure plates 20, and the aforementioned rotor frame 10. The rotor frame 10 includes a disc 11, with a plurality of reinforcing ribs 12 arranged on opposite sides of the disc 11. The reinforcing ribs 12 extend radially along the disc 11, and the plurality of reinforcing ribs 12 on each side are evenly spaced along the circumference of the disc 11. Adjacent reinforcing ribs 12 on the same side form receiving grooves 13, and the pressure plates 20 are correspondingly housed in each receiving groove 13. Each magnet 30 is embedded in the corresponding pressure plate 20 and the disc 11. The rotor frame 10 provided in this embodiment, by arranging radially extending reinforcing ribs 12 on both sides of the disc 11, can increase the overall axial stiffness of the rotor frame 10, thereby significantly increasing the axial stiffness of the rotor assembly 100.

[0033] In an optional embodiment, the reinforcing ribs 12 located on both sides of the disc body 11 are positioned correspondingly. Specifically, as shown... Figure 4 As shown, the number of reinforcing ribs 12 on both sides of the disc body 11 is equal and their positions correspond one-to-one. This makes the number of receiving grooves 13 on both sides of the disc body 11 equal and their positions correspond one-to-one and coincide. As a result, each limiting groove 50 on both sides of the disc body 11 is equipped with a pressure plate 20, and the positions of the pressure plates 20 on both sides of the disc body 11 correspond one-to-one and coincide, which facilitates the subsequent installation of the magnet 30.

[0034] Specifically, such as Figure 1 , Figures 3-5 As shown, each receiving slot 13 on the disc body 11 has a first retaining groove 15 at its bottom, and each pressure plate 20 has a second retaining groove 21. The second retaining groove 21 and the first retaining groove 15 are stacked to form a limiting groove 50, which is used to embed the magnet 30. That is, the limiting groove 50 is formed by stacking the first retaining groove 15 on the disc body 11 and the second retaining groove 21 on the pressure plates 20 located on both sides of the disc body 11. One magnet 30 is embedded in each limiting groove 50 to ensure the accurate positioning and stability of the magnet 30. Furthermore, the pressure plate 20 is embedded in the receiving slot 13, and the magnet 30 is embedded in the limiting groove 50, forming a rotor assembly 100 with two flat surfaces and a small axial dimension.

[0035] It should be noted that the reference Figure 5The shape of the receiving groove 13 is adapted to the shape of the pressure plate 20, and the shape of the limiting groove 50 is adapted to the shape of the magnet 30. In this embodiment, the receiving groove 13 is a fan-shaped groove, and the outer contour of the pressure plate 20 is a fan shape adapted to the receiving groove 13. The circumferential dimensions of the receiving groove 13 and the pressure plate 20 gradually increase radially from the inside to the outside. By setting the receiving groove 13 and the pressure plate 20 as fan-shaped, the structure is more compact after multiple pressure plates 20 are assembled circumferentially. Optionally, the magnet 30 is a fan-shaped structure, and the limiting groove 50 is a fan-shaped groove. That is, the first slot 15 and the second slot 21 forming the limiting groove 50 are both fan-shaped. The shape formed after the fan-shaped second slot 21 is opened on the fan-shaped pressure plate 20 is similar to Figure 3 As shown in the dovetail shape, the circumferential dimension of the magnet 30 gradually increases radially from the inside to the outside, but it is not limited to this. In other alternative embodiments, the limiting groove 50 and the magnet 30 may also adopt other shapes.

[0036] It should be noted that in this embodiment, the number of reinforcing ribs 12, pressure plates 20 and magnets 30 is not specifically limited, and can be set adaptively according to actual needs.

[0037] In an optional embodiment, such as Figure 2 As shown, a shaft hole is provided at the center of the disc body 11 so that the rotating shaft of the motor can pass through. The rotor frame 10 also includes an inner convex ring 14 arranged around the shaft hole. The inner convex ring 14 protrudes axially on the opposite sides of the disc body 11 and is connected to the ends of each reinforcing rib 12. The inner circumferential surface of the pressure plate 20 abuts against the inner convex ring 14, thus improving the assembly accuracy of the pressure plate 20 and the rotor frame 10.

[0038] In an optional embodiment, such as Figure 2 As shown, the rotor assembly 100 also includes a limiting ring 40, which is fitted onto the outer periphery of the rotor frame 10 and the magnet 30. Specifically, the inner peripheral surface of the magnet 30 abuts against the inner wall of the limiting groove 50, and the outer peripheral surface of the magnet 30 abuts against the limiting ring 40, achieving radial limiting of the magnet 30 to provide support for the magnet 30 during high-speed rotation of the rotor assembly 100. Simultaneously, the limiting ring 40 also acts as a barrier against the pressure plate 20 to resist the centrifugal force generated when the pressure plate 20 rotates, thereby improving the stability of the rotor assembly 100. The pressure plate 20 is fixed to the disc body 11 with screws to ensure the stability of the magnet 30.

[0039] In one optional embodiment, the rotor frame 10 is a one-piece metal part, such as stainless steel or aluminum alloy. One-piece metal parts have higher structural strength, better stability and durability, and the one-piece molding process allows the entire part to be formed in one mold at a time, reducing production steps and costs, and increasing production speed.

[0040] In one optional embodiment, the retaining ring 40 is made of carbon fiber. The high-strength carbon fiber material gives the retaining ring 40 extremely high stiffness and strength, enabling it to withstand large torques without being damaged.

[0041] In one optional embodiment, the pressure plate 20 is made of a high-strength non-metallic material, such as plastic or glass fiber composite material, which makes the pressure plate 20 strong and able to withstand a large centrifugal force, thus avoiding the risk of fatigue failure of the pressure plate 20 due to high centrifugal force.

[0042] This embodiment also provides an axial magnetic field motor, including at least one stator assembly and at least one rotor assembly 100. The rotor assembly 100 and the stator assembly are alternately distributed along the axial direction. The motor shaft can be integrally formed with or drive-connected to the output part of the rotor assembly 100. The rotor assembly 100 can be any of the aforementioned rotor assemblies. The aforementioned rotor assembly 100 has the above-described effects, and the axial magnetic field motor having the aforementioned rotor assembly 100 also has the above-described effects; therefore, it will not be described in detail here. It should be noted that the specific structure of the stator assembly is prior art and will not be described in detail here either.

[0043] Optionally, in this embodiment, the axial magnetic field motor is a dual-stator single-rotor axial magnetic field motor. In other optional embodiments, the axial magnetic field motor can also be a single-stator single-rotor, single-stator dual-rotor, or multi-stator multi-rotor axial magnetic field motor. Different types of axial magnetic flux have significant differences in manufacturing and assembly difficulty, cooling methods, and application scenarios.

[0044] It should be noted that the axial flux motor provided in this embodiment can be applied to electrical equipment. Optionally, the electrical equipment can be a vehicle, which can be a pure electric vehicle or a hybrid vehicle; this application does not impose any limitations. The axial flux motor can serve as a motor in a vehicle, used to output power to drive the wheels, for example, as a hub motor. The axial flux motor can also serve as a generator in a vehicle, generating electricity during vehicle operation to charge the vehicle's battery. Of course, in other optional embodiments, the electrical equipment may be other devices, which are not specifically limited here.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rotor frame, characterized in that, The disc body (11) includes a plurality of reinforcing ribs (12) on each of its opposite sides. The plurality of reinforcing ribs (12) on each side are evenly spaced along the circumference of the disc body (11). A receiving groove (13) is formed between two adjacent reinforcing ribs (12) on the same side. The receiving groove (13) is used to receive the pressure plate (20).

2. The rotor frame according to claim 1, characterized in that, The reinforcing ribs (12) located on both sides of the disc body (11) are positioned in a one-to-one correspondence.

3. The rotor frame according to claim 1, characterized in that, The disc body (11) has a shaft hole at its center. The rotor frame also includes an inner convex ring (14) surrounding the shaft hole. The inner convex ring (14) protrudes axially on opposite sides of the disc body (11) and is connected to the ends of each of the reinforcing ribs (12).

4. The rotor frame according to claim 1, characterized in that, The rotor frame is a one-piece molded metal part.

5. A rotor assembly, characterized in that, It includes multiple magnets (30), multiple pressure plates (20) and a rotor frame as described in any one of claims 1-4, wherein the pressure plates (20) are respectively housed in each of the receiving slots (13), and each magnet (30) is embedded in the corresponding pressure plate (20) and the disc body (11).

6. The rotor assembly according to claim 5, characterized in that, The disc body (11) is provided with a first slot (15), and each of the pressure plates (20) is provided with a second slot (21). The second slot (21) and the first slot (15) are stacked to form a limiting groove (50), which is used to embed the magnet (30).

7. The rotor assembly according to claim 6, characterized in that, The receiving groove (13) is a fan-shaped groove, and the outer contour of the pressure plate (20) is a fan shape adapted to the receiving groove (13); And / or, the magnet (30) is a fan-shaped structure, and the limiting groove (50) is a fan-shaped groove.

8. The rotor assembly according to claim 5, characterized in that, The rotor assembly also includes a limiting ring (40), which is fitted onto the outer periphery of the rotor frame and the magnet (30).

9. The rotor assembly according to claim 8, characterized in that, The limiting ring (40) is made of carbon fiber material; And / or, the pressure plate (20) is made of plastic or glass fiber composite material.

10. An axial magnetic field motor, characterized in that, It includes at least one stator assembly and at least one rotor assembly as claimed in any one of claims 5-9, wherein the rotor assembly and the stator assembly are alternately distributed along the axial direction.

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