High-temperature-wear-resistant plastic magnetic rotor

Abstract

The utility model relates to the technical field of plastic magnetic rotor structures, and discloses a high-temperature-wear-resistant plastic magnetic rotor, which comprises a plastic magnetic rotor body, a shaft hole is arranged at the central position of the plastic magnetic rotor body, a shaft sleeve is fixedly connected in the shaft hole, a plurality of air holes are circumferentially arranged at the joint of the shaft sleeve and the shaft hole, and a plurality of bead grooves are uniformly arranged among the air holes. The opening direction of the bead grooves is towards the center of the plastic magnetic rotor body, and balls are arranged in the bead grooves. Through the structural arrangement of the shaft sleeve, the balls in the shaft sleeve abut against the rotating shaft, guide protection during rotation is increased, and the abrasion problem caused by contact is reduced; and meanwhile, internal heat is dissipated through the cooperation of heat dissipation holes and heat dissipation blades, and air flow is driven by the rotation of the plastic magnetic rotor body through the cooperation of spoilers, so that the purpose of accelerating heat is achieved.

Description

Technical Field

[0001] This utility model relates to the field of plastic magnetic rotor structure technology, and in particular to a high-temperature wear-resistant plastic magnetic rotor. Background Technology

[0002] Plastic magnetic rotors are a new type of rotor structure that has been widely used in electric motors and generators in recent years. Utilizing a combination of a plastic substrate and permanent magnet materials, plastic magnetic rotors offer advantages such as lightweight, high efficiency, and low cost. Their core principle is to embed permanent magnet materials into the plastic matrix to form an integrated structure, thereby reducing the copper windings in traditional electric motor rotors and improving motor performance.

[0003] However, plastic magnetic rotor technology currently faces some challenges in practical applications, particularly in terms of heat dissipation and wear. The poor thermal conductivity of the plastic substrate itself makes plastic magnetic rotors prone to overheating under high loads, resulting in inadequate heat dissipation. Excessive temperature can also affect the magnetism of the permanent magnet material, thereby reducing the rotor's efficiency and stability.

[0004] Application number CN202321812105.8 proposes a radial four-pole plastic magnetic rotor, including a plastic magnetic body. The plastic magnetic body includes a cover plate and a magnetic yoke sidewall, which together form a chamber structure. The cover plate has several through holes for dissipating heat from the chamber structure, and these through holes communicate with the chamber structure. Compared to existing technologies, this invention increases the heat dissipation space through the through holes on the cover plate and the internal chamber structure, relying on the rotation of the rotor's plastic magnetic body to drive airflow and achieve heat dissipation. However, the plastic magnetic rotor may still experience wear between the plastic substrate and other components due to the working environment, thus affecting the rotor's lifespan and reliability. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a high-temperature wear-resistant plastic magnetic rotor.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0007] A high-temperature wear-resistant plastic magnetic rotor includes a plastic magnetic rotor body, a shaft hole at the center of the plastic magnetic rotor body, a bushing fixedly connected in the shaft hole, a plurality of vent holes around the connection between the bushing and the shaft hole, a plurality of bead grooves evenly arranged between the vent holes, the opening direction of the bead grooves being towards the center of the plastic magnetic rotor body, and rolling balls being arranged in the bead grooves.

[0008] Preferably, the plastic magnetic rotor body is provided with multiple heat dissipation holes, which are elliptical in shape.

[0009] As preferred, the heat dissipation leaves are arranged between the heat dissipation holes, and the heat dissipation leaves are arranged outside the plastic magnetic rotor body and gradually tapered from the shaft hole to the edge of the plastic magnetic rotor body.

[0010] As preferred, the side of the heat dissipation leaf surrounding the heat dissipation hole is concave arc-shaped.

[0011] As preferred, a plurality of spoiler plates are connected to the inner side of the plastic magnetic rotor body, and the spoiler plates are arranged on one side of the edge of the heat dissipation hole and the shape of the spoiler plate is matched with the edge of the heat dissipation hole.

[0012] As preferred, a plurality of guide holes are arranged on the spoiler plate, and the guide holes are arranged obliquely.

[0013] As preferred, the diameter of the ball groove is greater than the diameter of the ball, and the opening length of the ball groove is less than the diameter of the ball.

[0014] As preferred, a limiting groove is arranged in the direction close to the ball of the shaft sleeve.

[0015] The utility model discloses a kind of high-temperature wear-resistant plastic magnetic rotors, which comprises plastic magnetic rotor body, shaft hole, shaft sleeve, air hole, ball groove, ball, heat dissipation hole, heat dissipation leaf and spoiler plate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the main view structural schematic diagram of a kind of high-temperature wear-resistant plastic magnetic rotor of the utility model;

[0017] Fig. 2 It is the rear view structural schematic diagram of a kind of high-temperature wear-resistant plastic magnetic rotor of the utility model;

[0018] Fig. 3 It is the structural schematic diagram of spoiler plate in a kind of high-temperature wear-resistant plastic magnetic rotor of the utility model;

[0019] Fig. 4 It is the cross-sectional structural schematic diagram of shaft hole and shaft sleeve in a kind of high-temperature wear-resistant plastic magnetic rotor of the utility model.

[0020] In the drawing: 1-plastic magnetic rotor body, 11-shaft hole, 12-shaft sleeve, 13-air hole, 14-ball groove, 15-ball, 21-heat dissipation hole, 22-heat dissipation leaf, 23-spoiler plate, 24-guide hole, 25-limiting groove. DETAILED DESCRIPTION

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Example 1

[0023] like Figs. 1 to 4 As shown, this application provides a high-temperature wear-resistant plastic magnetic rotor, including a plastic magnetic rotor body 1. A shaft hole 11 is provided at the center of the plastic magnetic rotor body 1. A bushing 12 is fixedly connected in the shaft hole 11. A plurality of vent holes 13 are arranged around the connection between the bushing 12 and the shaft hole 11. The vent holes 13 are used to allow heat to flow out between the plastic magnetic rotor body 1 and the rotating shaft, so as to achieve the purpose of heat dissipation. A plurality of bead grooves 14 are evenly provided between the vent holes 13. The opening direction of the bead grooves 14 is towards the center of the plastic magnetic rotor body 1. Rolling balls 15 are provided in the bead grooves 14, which serve to fix the plastic magnetic rotor body 1 to the rotating shaft.

[0024] The diameter of the ball groove 14 is larger than the diameter of the ball 15, and the opening length of the ball groove 14 is smaller than the diameter of the ball 15, so that the ball 15 is embedded in the ball groove 14.

[0025] A limiting groove 25 is provided in the bushing 12 near the ball 15. The limiting groove 25 makes the part of the ball 15 protruding from the ball groove 14 flush with the bushing 12, so that both the bushing 12 and the ball 15 can play a fixed role.

[0026] The structure of the bushing 12 allows the balls 15 inside the bushing 12 to abut against the rotating shaft, increasing guidance and protection during rotation and reducing wear caused by contact.

[0027] Example 2

[0028] Example 2 is largely the same as Example 1, except that the plastic magnetic rotor body 1 is provided with a plurality of heat dissipation holes 21. The heat dissipation holes 21 are elliptical in shape. By setting the heat dissipation holes 21, the internal heat can flow out from the heat dissipation holes 21, so as to achieve the purpose of heat dissipation.

[0029] Heat dissipation fins 22 are provided at intervals between the heat dissipation holes 21. The heat dissipation fins 22 are located on the outside of the plastic magnetic rotor body 1. The heat dissipation fins 22 gradually become pointed from the shaft hole 11 to the edge of the plastic magnetic rotor body 1. While cooperating with heat dissipation, they can reduce the weight of the plastic magnetic rotor.

[0030] The side of the heat dissipation fin 22 that surrounds the heat dissipation hole 21 is concave arc-shaped, which helps to dissipate the heat emitted from the heat dissipation hole 21.

[0031] The inside of the plastic magnetic rotor body 1 is connected with a plurality of spoiler plates 23, which are arranged on the side of the edge of the heat dissipation hole 21 and have a shape that fits the edge of the heat dissipation hole 21.

[0032] The spoiler plates 23 are provided with a plurality of guide holes 24, which are arranged obliquely to accelerate the outflow of internal air and the dissipation of internal heat.

[0033] The internal heat is dissipated through the cooperation of the heat dissipation hole 21 and the heat dissipation leaf 22, and the cooperation of the spoiler plates 23, relying on the rotation of the plastic magnetic rotor body 1 itself to drive air flow, thereby achieving the purpose of accelerating heat dissipation.

[0034] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, the above technical solutions provided by the embodiments of the present application are not described in detail, so as not to be too verbose.

[0035] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high temperature wear resistant plastic magnetic rotor, characterized by: The plastic magnetic rotor body (1) is provided with an axle hole (11) in the center position, and the axle hole (11) is fixedly connected with an axle sleeve (12), a plurality of air holes (13) are arranged around the connecting position between the axle sleeve (12) and the axle hole (11), a plurality of ball grooves (14) are uniformly arranged between the air holes (13), the opening direction of the ball grooves (14) is the center position of the plastic magnetic rotor body (1), and the ball grooves (14) are provided with balls (15).

2. A high temperature wear resistant plastic magnetic rotor as claimed in claim 1, wherein: A plurality of heat dissipation holes (21) are arranged on the plastic magnetic rotor body (1), and the heat dissipation holes (21) are in an oval shape.

3. A high temperature wear resistant plastic magnetic rotor as claimed in claim 2, wherein: A plurality of heat dissipation leaves (22) are arranged between the heat dissipation holes (21), the heat dissipation leaves (22) are arranged on the outer side of the plastic magnetic rotor body (1), and the heat dissipation leaves (22) are gradually tapered from the axle hole (11) to the edge of the plastic magnetic rotor body (1).

4. A high temperature wear resistant plastic magnetic rotor as claimed in claim 3 wherein: The side of the heat dissipation leaves (22) surrounded by the heat dissipation holes (21) is in a concave arc shape.

5. A high temperature wear resistant plastic magnetic rotor as claimed in claim 2 wherein: A plurality of spoiler plates (23) are connected to the inner side of the plastic magnetic rotor body (1), the spoiler plates (23) are arranged on one side of the edge of the heat dissipation holes (21) and are in a shape matching the edge of the heat dissipation holes (21).

6. A high temperature wear resistant plastic magnetic rotor as claimed in claim 5 wherein: A plurality of guide holes (24) are arranged on the spoiler plates (23), and the guide holes (24) are arranged in an inclined manner.

7. A high temperature wear resistant plastic magnetic rotor as claimed in claim 1 wherein: The diameter of the ball grooves (14) is greater than the diameter of the balls (15), and the opening length of the ball grooves (14) is less than the diameter of the balls (15).

8. A high temperature wear resistant plastic magnetic rotor as claimed in claim 1 wherein: A limiting groove (25) is arranged on the axle sleeve (12) in the direction close to the balls (15).

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