A rotor core structure of a disc motor

Abstract

The utility model discloses a rotor core structure of disc type motor, including rotor disc, rotor core and a plurality of permanent magnet, the one side of rotor disc is provided with the annular installation groove, and this installation groove is fixed with rotor core, permanent magnet and pressboard from below to above in proper order, permanent magnet is arranged in magnet support in round array, magnet support is round ring shape, and the side of magnet support is provided with a plurality of insertion slot in round array, permanent magnet is fixed in insertion slot, and the side of permanent magnet is "> " shape, for the sidewall of corresponding insertion slot is "> " shape also, and the sidewall of magnet support is still tightly matched with the setting of holding turn, the multiple fixed strategy of " gluing + clamping tight + mechanical pressure tight " of the utility model can effectively resist the powerful centrifugal force and axial magnetic pull when high -speed operation, prevents permanent magnet loose or fall off, improves the reliability and security of operation.

Description

Technical Field

[0001] This utility model relates to the field of disc motors, specifically a rotor core structure for a disc motor. Background Technology

[0002] Disc motors are characterized by their small size, light weight, and high efficiency. In general motors, the rotor and stator are fitted together inside and out. In axial magnetic field motors, in order to be thinner, the stator is on a flat base plate, and the rotor is placed on top of the stator. Generally, the stator is a coil, and the rotor is a permanent magnet or a disc with a permanent magnet attached.

[0003] For example, patent application number CN202510827133.4 discloses a rotor structure suitable for improving the field weakening and speed amplification capability of a disc motor. The rotor core is embedded in the groove of the rotor support disk, and the composite magnetic poles are evenly arranged and attached to the surface of the rotor core. The magnetic shielding bracket is fixed together with the rotor support disk, and the composite magnetic poles are embedded in the mounting groove of the magnetic shielding bracket. The composite magnetic poles are composed of permanent magnets, parallel magnetic poles and series magnetic poles. The series magnetic poles are attached to the surface of the permanent magnet in the axial direction to form the series part of the magnetic poles. The parallel magnetic poles are placed in parallel with the series part of the magnetic poles in a radial direction, and the parallel magnetic poles are placed in parallel with the series part of the magnetic poles to form the parallel part of the magnetic poles.

[0004] The aforementioned patents significantly improve the direct-axis inductance of the motor; compared to disc motors with parallel combined magnetic poles, they offer greater output power within the same speed range. Their application in disc motors provides a wider field-weakening speed range and enhances the motor's load-carrying capacity at low speeds.

[0005] However, traditional techniques involve first fixing the rotor core to the rotor disk with magnetic adhesive, and then sequentially and evenly attaching permanent magnet units N and S to the surface of the rotor core. When the rotor rotates at high speed, the strong repulsive or attractive forces between the individual permanent magnets increase the potential risk of them detaching, making reliability highly dependent on the quality of the adhesive bonding.

[0006] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0007] The purpose of this invention is to provide a rotor core structure for a disc motor to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A rotor core structure for a disc motor includes a rotor disc, a rotor core, and several permanent magnets. An annular mounting groove is provided on one side of the rotor disc, within which the rotor core, permanent magnets, and a pressure plate are sequentially fixed from bottom to top. The permanent magnets are arranged in a circular array within a magnet support, which is annular in shape. Several slots are arranged in a circular array on the side of the magnet support, and the permanent magnets are fixedly installed within these slots. The side edges of the permanent magnets are ">" shaped, and the sidewalls of the corresponding slots are also ">" shaped. A retaining ring is also tightly fitted onto the sidewall of the magnet support. After the permanent magnets are inserted into the slots and the magnetic adhesive has cured, the retaining ring is then placed around the sidewall of the magnet support, and finally, the magnet support, along with the permanent magnets, is placed into the mounting groove.

[0010] Furthermore, the permanent magnets are provided in an even number, and the polarities of adjacent permanent magnets are opposite.

[0011] Furthermore, the permanent magnet is fan-shaped, and similarly, the slot is also fan-shaped.

[0012] Furthermore, the permanent magnet is also bonded to the inner wall of the slot by magnetic adhesive or epoxy resin.

[0013] Furthermore, the rotor disk, rotor core, permanent magnet and pressure plate are fixedly connected by rivets, and through holes for the rivets to pass through are provided on the rotor disk, rotor core, permanent magnet and pressure plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention employs a fan-shaped annular permanent magnet with ">" shaped sides that mates with a corresponding slot, combined with magnetic steel adhesive bonding and clamping, and finally mechanically secured with rivets and pressure plates. This multi-layered fixing strategy of "adhesive bonding + clamping + mechanical pressing" effectively resists the strong centrifugal force and axial magnetic pull during high-speed operation, preventing the permanent magnet from loosening or falling off, thus improving operational reliability and safety.

[0016] The permanent magnets are pre-installed on the magnet bracket to form a module, which simplifies the overall assembly process. This modular design not only facilitates the initial installation and debugging, but also provides convenience for possible subsequent maintenance or replacement, reducing maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the rotor core structure of a disc motor.

[0018] Figure 2 This is a top view of the rotor core structure of a disc motor.

[0019] Figure 3This is an exploded view of the rotor core structure of a disc motor.

[0020] Figure 4 for Figure 3 A magnified view of a portion of point a. Detailed Implementation

[0021] 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. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0022] Please see Figure 1-4 A rotor core structure for a disc motor includes a rotor disc 1, a rotor core 2, and several permanent magnets 3; an annular mounting groove 101 is provided on one side of the rotor disc 1, and the rotor core 2, permanent magnets 3, and pressure plate 4 are fixedly installed in the mounting groove 101 from bottom to top.

[0023] The permanent magnets 3 are divided into two types, N pole and S pole, depending on the direction of magnetization. Like poles repel each other, and unlike poles attract each other. In order to ensure that the permanent magnets 3 with N pole and S pole appear in pairs, there are an even number of permanent magnets 3, and the polarities of adjacent permanent magnets 3 are opposite.

[0024] It is worth noting that in this scheme, the permanent magnets 3 are arranged in a circular array on the magnet support 5. The magnet support 5 is annular, and its side surface has a plurality of slots 501 arranged in a circular array. The permanent magnets 3 are fixedly installed in the slots 501. Furthermore, the side of the permanent magnet 3 is ">" shaped, and the sidewall of the corresponding slot 501 is also ">" shaped.

[0025] The permanent magnet 3 is in the shape of a fan ring, and similarly, the slot 501 is also in the shape of a fan ring. The ">" shaped structure makes it easier for the permanent magnet 3 to be inserted into the slot 501.

[0026] During assembly, the permanent magnet 3 is bonded to the inner wall of the slot 501 by magnetic adhesive or epoxy resin; at the same time, a retaining coil 502 is tightly fitted on the side wall of the magnet bracket 5; after the permanent magnet 3 is inserted into the slot 501 and the magnetic adhesive has cured, the retaining coil 502 is then wrapped around the side wall of the magnet bracket 5, and finally the magnet bracket 5 together with the permanent magnet 3 is placed into the mounting groove 101.

[0027] The rotor disk 1, rotor core 2, permanent magnet 3 and pressure plate 4 are also fixedly connected by rivets 6. Through holes for the rivets 6 to pass through are provided on the rotor disk 1, rotor core 2, permanent magnet 3 and pressure plate 4.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

Claims

1. A rotor core structure for a disc motor, comprising a rotor disc, a rotor core, and a plurality of permanent magnets; characterized in that, A ring-shaped mounting groove is provided on one side of the rotor disk. The rotor core, permanent magnet, and pressure plate are fixedly installed in the mounting groove from bottom to top. The permanent magnets are arranged in a circular array in the magnet support. The magnet support is circular, and several slots are arranged in a circular array on the side of the magnet support. The permanent magnets are fixedly installed in the slots. The side of the permanent magnet is ">" shaped, and the side wall of the corresponding slot is also ">" shaped. At the same time, a retaining ring is tightly fitted on the side wall of the magnet support. After the permanent magnet is inserted into the slot and the magnet adhesive is cured, the retaining ring is closed around the side wall of the magnet support. Finally, the magnet support and the permanent magnet are placed into the mounting groove.

2. The rotor core structure of a disc motor according to claim 1, characterized in that, The permanent magnets are provided in an even number, and the polarities of adjacent permanent magnets are opposite.

3. The rotor core structure of a disc motor according to claim 1, characterized in that, The permanent magnet is fan-shaped, and similarly, the slot is also fan-shaped.

4. The rotor core structure of a disc motor according to claim 1, characterized in that, The permanent magnet is also bonded to the inner wall of the slot by magnetic adhesive or epoxy resin.

5. The rotor core structure of a disc motor according to claim 1, characterized in that, The rotor disk, rotor core, permanent magnet and pressure plate are also fixedly connected by rivets, and through holes for the rivets to pass through are provided on the rotor disk, rotor core, permanent magnet and pressure plate.

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