WO2016124082A1

WO2016124082A1 - High-strength close-fitting motor rotor

Info

Publication number: WO2016124082A1
Application number: PCT/CN2016/071738
Authority: WO
Inventors: 张建生
Original assignee: 佛山市启正电气有限公司
Priority date: 2015-02-06
Filing date: 2016-01-22
Publication date: 2016-08-11
Also published as: CN204349625U

Abstract

A high-strength close-fitting motor rotor, comprising a magnetic element (1), an element-enclosing body (2) and an iron core (3); the element-enclosing body is formed via an injection molding process, and directly encloses the magnetic element and the iron core; the element-enclosing body has an annular structure; a plurality of magnetic elements are uniformly arranged in the element-enclosing body, and the iron core is wound around the plurality of magnetic elements. A wound iron core self-shielding configuration greatly increases a magnetic flux density at one side of an air gap, and increases a utilization rate of a permanent magnet and a power density of a motor, thereby enabling a reduction in weight of a motor rotor, and improving a quick responsiveness of a motor and a product efficiency.

Description

High-strength laminating motor rotor

Technical field

The utility model relates to a high-strength welding motor rotor.

Background technique

In DC brushless motors, existing magnetic component mounting methods are:

1) Adhesive fixing: However, there is no difficulty in uniform application of glue, no environmental protection, long heat-solid time, low production efficiency, and there is a hidden danger of falling-off motor in later use.

2) Fixing by fixed bracket slot: However, it is required to have high dimensional accuracy of the magnetic tile to fix the magnetic tile firmly, otherwise the installation will not be inserted or loosened, which makes the production cost high.

The above installation method makes the outer diameter fluctuation range of the rotor larger, resulting in asymmetry of the air gap of the motor, which leads to large jitter and noise caused by the motor running, and high installation cost, poor precision and low production efficiency.

Summary of the invention

In view of the above problems, the object of the present invention is to provide a high-strength-fit motor rotor in which the rotor and the iron core are tightly combined, the performance stability and consistency are good, and the processing efficiency is high.

To this end, the utility model adopts the following technical solutions:

A high strength bonded motor rotor; comprising a magnetic element, an element inclusion and an iron core, wherein the element inclusion formed by an injection molding process directly encloses the magnetic element and the core; the element The inclusions are annular structures, a plurality of the magnetic elements being evenly distributed within the component package, the core being wound around a plurality of the magnetic components.

The iron core is an open-shaped iron ring, and the diameter of the iron ring is smaller than the outer diameters of the plurality of magnetic elements, so that the open-shaped iron ring compresses a plurality of the magnetic elements by elastic force.

The magnetic element is a cuboid-like structure having a curvature, and five sides of the cuboid structure are completely fixed in the element package, and a sixth side is exposed on an inner side of the element inclusion; the core Wound around a number of the magnetic elements.

The magnetic element is a cuboid-like structure having two symmetrical curved faces, and one of the curved faces is exposed on an inner side of the element inclusion.

A sixth side of the magnetic element protrudes from an inner wall of the component inclusion.

The axial outer wall of the component inclusion body is provided with convex teeth, and the plurality of convex teeth are radially distributed on the circumference of the component inclusion body.

The convex teeth are hollow trough structures.

The end faces of the protruding teeth are higher than the end faces of the component inclusions.

The bottom end of the protruding tooth is fixedly connected to the component inclusion by a rounded corner.

The utility model has the beneficial effects that: a plurality of the magnetic elements are evenly distributed in the component package body, the iron core is wound around a plurality of the magnetic components; the iron core adopts a winding self-shielding design, is located on the outer wall of the magnetic component, and is tightly wound Magnetic components, the role is as follows:

1. The core-wound self-shielding design can greatly increase the magnetic flux density on the air gap side, improve the utilization rate of the permanent magnet material, and increase the power density of the motor, thereby reducing the weight of the motor rotor;

2. Due to the reduction of the rotor weight of the motor, the moment of inertia of the motor is also reduced synchronously, which improves the rapid responsiveness of the motor and improves product efficiency.

DRAWINGS

Figure 1 is a schematic structural view of an embodiment of the present invention;

Figure 2 is a plan sectional view of the embodiment of Figure 1;

Figure 3 is a side cross-sectional view of the embodiment of Figure 1.

Among them: magnetic element 1, element inclusion 2, iron core 3, convex tooth 4.

detailed description

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIG. 1, FIG. 2 and FIG. 3, a high-strength-fitted motor rotor includes a magnetic element 1, an element inclusion 2 and an iron core 3, and the component inclusion body 2 formed by an injection molding process is directly disposed. The magnetic element 1 and the iron core 3 are wrapped therein; the element inclusion 2 is an annular structure, and a plurality of the magnetic elements 1 are evenly distributed in the element inclusion 2, and the core 3 is wound Around a number of said magnetic elements 1.

The magnetic element 1 and the iron core 3 are formed into an integral assembly by an injection molding process, and the element inclusion body 2 is an annular structure obtained by an injection molding process of an injection molding material, and the magnetic element 1 and the iron core 3 are disposed in the element inclusion body. In 2, the gap size between the inner wall of the magnetic component 1 and the motor stator is effectively controlled, and the stability and consistency of the product performance are ensured.

The component inclusion 2 is a product obtained by injection molding. The magnetic component 1 and the iron core 3 are first fixed at a set position, and then cast. After the molding is completed, the magnetic component 1 and the iron core 3 are fixed in a stable relative size. In the component package 2, from the production process, the production efficiency is high, and it is suitable for mass production; from the viewpoint of product quality, the fixed dimensional accuracy of the magnetic component 1 and the iron core 3 is high, and the efficiency of installation of the entire component is high, and the efficiency is lowered. Production costs.

During the injection molding process, a plurality of magnetic components 1 are mounted on the corresponding positions of the plastic mold core, the wound core 3 is wound around the outer arc of the magnetic component 1, and then the mold clamping is performed; after the injection molding is completed, the magnetic ring is taken out by the mold opening. Component. The double-slide vertical injection molding machine used in the technical solution is processed, and one upper mold is equipped with two lower mold rotation continuous injection molding production. When one lower mold is produced, the other lower mold can simultaneously mount the magnetic component and the iron core, and the efficiency thereof is It is twice as large as ordinary injection molding machines.

The iron core 3 is an open-shaped iron ring, and the diameter of the iron ring is smaller than the outer diameters of the plurality of magnetic elements 1, so that the open-shaped iron ring presses a plurality of the magnetic elements 1 by elastic force. The wound core is formed by vertically stacking open iron rings. The inner diameter of the iron ring is slightly smaller than the outer diameter of the magnetic element, and the elastic element is designed to press the magnetic element 1 on the core of the plastic mold to ensure the core 3 Compared with the closed-loop iron core, the open-loop design facilitates the installation of the iron core, and the dimensional tolerance of the fitting is not high, which can improve the product qualification rate and facilitate the mass production of the rotor.

As shown in FIG. 1 and FIG. 2, the magnetic element 1 is a rectangular parallelepiped structure with a curvature, and five sides of the rectangular parallelepiped structure are completely fixed in the element inclusion body 2, and the sixth side is exposed in the The inner side surface of the element package 2; the iron core 3 is wound around a plurality of the magnetic elements 1. The five sides of the cuboid structure are completely fixed in the element inclusion 2 such that the magnetic element 1 is more stably engaged with the element inclusion 2; the sixth side Exposed to the inner side of the component package 2; the core 3 is wound around a plurality of the magnetic elements 1, and the plurality of magnetic elements 1 form a more stable magnetic field in the annular element inclusion 2 to ensure the rotor Performance of use.

The magnetic element 1 is a cuboid structure having two symmetrical curved faces, and one of the curved faces is exposed on the inner side of the element inclusion 2. The magnetic element 1 having the circular arc surface is closely attached to the annular element inclusion 2, and the two are not easily separated during the high-speed rotation of the rotor; the stability of the product performance is ensured.

As shown in FIG. 2, the sixth side of the magnetic element 1 protrudes from the inner wall of the element inclusion 2. Different from the structure in which the sixth side of the magnetic element 1 is flush with the inner wall of the element inclusion 2, the sixth side of the magnetic element 1 is protruded from the inner wall of the element inclusion 2, and injection molding is used. When the module is processed, the injection molding material flows to the intersection of the magnetic component 1 and the mold to stop, so that the interface between the component inclusion body 2 and the magnetic component 1 is clear at the time of final injection molding, and there is no problem that the burr and the like affect the stability of the magnetic field and the performance of the rotor. And improve processing efficiency.

The axial outer wall of the component inclusion 2 is provided with convex teeth 4, and a plurality of the convex teeth 4 are radially distributed on the circumference of the component inclusion 2. The function of the convex tooth 4 is to fix the rotor magnetic ring assembly on the product casing, and the length of the convex tooth 4 can be adjusted on the mold according to different diameters of the motor casing, which can be used for various types of products, which can reduce the investment of the mold and can also reduce the investment of the mold. Increase productivity.

The protruding teeth 4 are hollow trough structures. The hollow trough portion facilitates the installation of the rotor through the teeth 4 while also reducing the weight of the rotor.

The end faces of the male teeth 4 are higher than the end faces of the component inclusions 2. The friction of the component package 2 with other adjacent components at the time of high speed rotation is avoided, and the service life is prolonged.

The bottom end of the protruding tooth 4 is fixedly connected to the element inclusion 2 by a rounded corner. The rounded connection enhances the stability of the connection between the two, and particularly ensures that the safety of the protruding teeth 4 from the component inclusion 2 can be avoided when the rotor rotates at a high speed.

The technical principles of the present invention have been described above in connection with specific embodiments. The descriptions are only intended to explain the principles of the present invention and are not to be construed as limiting the scope of the invention. Based on the explanation herein, those skilled in the art can associate other embodiments of the present invention without any inventive effort, and all of them fall within the scope of the present invention.

Claims

A high-strength-fit motor rotor characterized by comprising a magnetic element, an element inclusion and an iron core, wherein the element inclusion formed by an injection molding process directly encloses the magnetic element and the iron core therein The component inclusions are annular structures, a plurality of the magnetic elements are evenly distributed within the component package, and the core is wound around a plurality of the magnetic components.
A high-strength-fit motor rotor according to claim 1, wherein said iron core is an open-shaped iron ring, and said iron ring has a diameter smaller than an outer diameter of said plurality of said magnetic members, The open-shaped iron ring compresses a plurality of the magnetic members by elastic force.
A high-strength-fitted motor rotor according to claim 1, wherein said magnetic member is a rectangular parallelepiped structure having a curvature, and five sides of said rectangular parallelepiped structure are completely fixed to said component package. In the body, a sixth side is exposed on an inner side of the component inclusion; the core is wound around a plurality of the magnetic elements.
A high-strength-fit motor rotor according to claim 3, wherein said magnetic member is a cuboid-like structure having two symmetrical curved faces, and one of said curved faces is exposed to said The inner side of the component package.
A high strength bonded motor rotor according to claim 3, wherein the sixth side of the magnetic member protrudes from the inner wall of the component inclusion.
A high-strength-fitted motor rotor according to claim 1, wherein said axially outer wall of said component inclusion is provided with convex teeth, and said plurality of said teeth are radially distributed in said component inclusions. circumference.
A high-strength-fit motor rotor according to claim 6, wherein the convex teeth are hollow trough structures.
A high-strength-fit motor rotor according to claim 6, wherein the end surface of the convex tooth is higher than the end surface of the component inclusion.
The high-strength-fitted motor rotor according to claim 8, wherein the bottom end of the protruding tooth is fixedly connected to the component inclusion by a rounded corner.