Stator core rubber coating structure of outer rotor brushless motor

Abstract

This utility model discloses a rubber-coated stator core structure for an external rotor brushless motor, relating to the field of motor design. It includes a copper wire winding, comprising a core support and a rubber-coated wire frame. Several wire grooves are integrally formed on the outer side of the core support. The rubber-coated wire frame is installed on the outer side of the core support, including a left and a right wire frame. Several through-holes are integrally formed on both the left and right wire frames, with the wire grooves and through-holes corresponding to each other. Insulating edges are integrally formed at the through-holes of both the left and right wire frames. This utility model adds a structure to the rubber-coated wire frame that encloses the core support. The rubber-coated wire frame is assembled from the left and right wire frames, which can wrap around the core support for insulation, resulting in better insulation. Compared to existing insulation coating methods, the controllable thickness of the rubber-coated wire frame facilitates subsequent precision winding, improving the production efficiency of the brushless motor.

Description

Technical Field

[0001] This utility model relates to the field of motor design, and in particular to the rubber-coated stator core structure of an external rotor brushless motor. Background Technology

[0002] A brushless DC motor is a type of DC motor that does not use mechanical commutation contacts (carbon brushes). Instead, it uses an electronic controller to achieve commutation, replacing the traditional brushed DC motor. Therefore, it is also known as an electronically adjustable speed DC motor or an electronically commutated DC motor.

[0003] Currently, brushless DC motors consist of a stator and an external rotor. The stator has a structure with copper wire windings fixedly installed. The copper wire windings are mostly made by winding copper wires on an iron core. To ensure insulation performance, insulating powder or insulating black glue needs to be coated on the iron core before winding the copper wires, so that an insulating structure is formed on the surface of the iron core. However, it is difficult to precisely control the uniformity of the thickness of the insulating structure coated in this way, which leads to low precision when winding the copper wires later, making it difficult to achieve precision winding. The winding efficiency is low and the production speed is slow. Therefore, it is necessary to design an insulating structure that completely covers the iron core to solve this technical problem. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model provides a technical solution that can solve the above problems.

[0005] The stator core of the external rotor brushless motor is coated with rubber, including a copper wire winding. The copper wire winding includes a core support and a coated wire frame. Several wire slots are integrally formed on the outer side of the core support, arranged in a circular array. The coated wire frame is installed on the outer side of the core support, including a left wire frame and a right wire frame. The core support is installed between the left and right wire frames. Several through holes are integrally formed on both the left and right wire frames, with the wire slots and through holes corresponding to each other. Insulating edges are integrally formed at the through holes of both the left and right wire frames, and the insulating edges of the left and right wire frames are inserted into the left and right sides of the wire slots with a gap fit.

[0006] Furthermore: the insulating edges of the left and right wire frames are arranged to abut against each other, and the insulating edges of the left and right wire frames form an insulating structure that covers the wire groove.

[0007] Furthermore: a first slot is integrally formed between two adjacent wire slots, and a plurality of second slots are integrally formed on the outer sides of the left and right wire frames, with each second slot corresponding to the outer side of the first slot.

[0008] Furthermore, the iron core bracket has an integrally formed mounting hole in the middle.

[0009] Furthermore, a mounting groove is integrally formed on one side of the mounting hole.

[0010] Furthermore, a reinforcing ring is integrally formed on the left side of the left wire frame, and the inner diameter of the reinforcing ring is larger than the inner diameter of the mounting hole.

[0011] Furthermore, the reinforcing ring is integrally formed with several snap-fit ​​edges, which are arranged in a circular array with each other.

[0012] Furthermore, one or more locating pins are integrally formed on the reinforcing ring.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The structure of the insulated wire frame is increased to cover the iron core support. The insulated wire frame is assembled from the left and right wire frames, which can wrap the iron core support for insulation, resulting in better insulation effect;

[0015] 2. Compared with existing coating insulation methods, the thickness of the coated wire frame is controllable, which facilitates subsequent precision winding and improves the production efficiency of brushless motors.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a structural diagram showing the disassembly of the left and right cable trays;

[0020] Figure 3 yes Figure 2 A magnified structural diagram at point A;

[0021] Figure 4 yes Figure 2 A magnified structural diagram at point B;

[0022] Figure 5 yes Figure 2 A magnified structural diagram at point C;

[0023] Figure 6 This is an exploded structural diagram of the application of this utility model in a brushless motor.

[0024] The diagram shows: 01, copper wire winding; 01.1, iron core support; 01.2, rubber-coated wire frame; 0111, left wire frame; 0112, right wire frame; 02, wire groove; 03, wire hole; 04, insulation edge; 05, insulation structure; 06, first slot; 07, second slot; 08, mounting hole; 09, mounting cross slot; 010, reinforcing ring; 011, snap-fit ​​edge; 012, positioning pin. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0026] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0027] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

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

[0030] like Figure 1-6 As shown, the stator core coating structure of the external rotor brushless motor of this utility model includes a copper wire winding 01, which includes a core support 01.1 and a coating wire frame 01.2. The outer side of the core support 01.1 is integrally formed with several wire grooves 02, which are arranged in a circular array. The coating wire frame 01.2 is installed on the outer side of the core support 01.1, and includes a left wire frame 0111 and a right wire frame 0112. The core bracket 01.1 is installed between the left wire frame 0111 and the right wire frame 0112. Both the left wire frame 0111 and the right wire frame 0112 are integrally formed with a number of wire holes 03. The wire groove 02 and the wire holes 03 are arranged in a corresponding manner to each other. The wire holes 03 of the left wire frame 0111 and the right wire frame 0112 are integrally formed with insulating edges 04. The insulating edges 04 of the left wire frame 0111 and the right wire frame 0112 are inserted into the left and right sides of the wire groove 02 with a gap fit.

[0031] The principle is as follows: the structure of the insulated wire frame 01.2 is added to cover the iron core support 01.1. The insulated wire frame 01.2 is assembled from the left wire frame 0111 and the right wire frame 0112. It can wrap the iron core support 01.1 for insulation, and the insulation effect is better. At the same time, compared with the existing coating insulation method, since the thickness of the insulated wire frame 01.2 is controllable, it can facilitate subsequent precision winding and improve the production efficiency of brushless motor.

[0032] Furthermore: the insulating edges 04 of the left wire frame 0111 and the right wire frame 0112 are mutually abutting each other, and the insulating edges 04 of the left wire frame 0111 and the right wire frame 0112 form an insulating structure 05 that covers the wire groove 02; it can effectively wrap the entire iron core support 01.1, achieve full insulation, and ensure that the iron core support 01.1 will not come into contact with the winding copper wire, which facilitates subsequent precision winding operations.

[0033] Furthermore: A first slot 06 is integrally formed between two adjacent wire slots 02, and several second slots 07 are integrally formed on the outer sides of the left wire frame 0111 and the right wire frame 0112. The second slots 07 are arranged one-to-one with the outer side of the first slot 06; so that the outer edge of the iron core support 01.1 can be exposed from the rubber-coated wire frame 01.2, which facilitates its assembly with the permanent magnet ring. The high-speed operation of the brushless motor is achieved by magnetic guidance, resulting in higher stability.

[0034] Furthermore, the iron core bracket 01.1 has an integrally formed mounting hole 08 in the middle, which enables the iron core bracket to be stably assembled on the stator.

[0035] Furthermore, a mounting groove 09 is integrally formed on one side of the mounting hole 08; the mounting groove 09 ensures the stable assembly of the core support 01.1 on the stator.

[0036] Furthermore: A reinforcing ring 010 is integrally formed on the left side of the left wire frame 0111, and the inner diameter of the reinforcing ring 010 is larger than the inner diameter of the mounting hole 08; the setting of the reinforcing ring 010 can enhance the strength of the left wire frame 0111 and ensure the service life of the motor.

[0037] Furthermore, the reinforcing ring 010 is integrally formed with several snap-fit ​​edges 011, which are arranged in a circular array with each other; this makes the installation of the left wire frame 0111 on the stator more secure, and can be assembled by snapping, resulting in high production efficiency.

[0038] Furthermore, one or more positioning pins 012 are integrally formed on the reinforcing ring 010; the positioning pins 012 can effectively limit the installation angle of the left wire frame 0111 and ensure its stability after assembly.

[0039] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. An external rotor brushless motor stator core coated with rubber, including copper wire windings, characterized in that: The copper wire winding includes an iron core support and a rubber-coated wire frame; The outer side of the iron core support is integrally formed with several wire grooves, which are arranged in a circular array with each other. The rubber-coated wire frame is installed on the outside of the iron core support. The rubber-coated wire frame includes a left wire frame and a right wire frame. The iron core support is installed between the left wire frame and the right wire frame. Both the left wire frame and the right wire frame are integrally formed with several wire holes. The wire groove and the wire holes are arranged in a left-right correspondence with each other. The left and right wire frames are integrally formed with insulating edges at the wire holes, and the insulating edges of the left and right wire frames are inserted into the left and right sides of the wire groove with a gap fit.

2. The stator core coating structure of the external rotor brushless motor according to claim 1, characterized in that: The insulating edges of the left and right wire frames abut against each other, and the insulating edges of the left and right wire frames form an insulating structure that covers the wire groove.

3. The stator core coating structure of the external rotor brushless motor according to claim 1, characterized in that: A first slot is integrally formed between two adjacent wire slots, and several second slots are integrally formed on the outer sides of the left and right wire frames, with each second slot corresponding to the outer side of the first slot.

4. The stator core coating structure of the external rotor brushless motor according to claim 1, characterized in that: The iron core bracket has an integrally formed mounting hole in the middle.

5. The stator core coating structure of the external rotor brushless motor according to claim 4, characterized in that: One side of the mounting hole is integrally formed with a mounting groove.

6. The rubber-coated stator core structure of the external rotor brushless motor according to claim 4, characterized in that: A reinforcing ring is integrally formed on the left side of the left wire frame, and the inner diameter of the reinforcing ring is larger than the inner diameter of the mounting hole.

7. The stator core coating structure of the external rotor brushless motor according to claim 6, characterized in that: The reinforcing ring is integrally formed with several snap-fit ​​edges, which are arranged in a circular array with each other.

8. The stator core coating structure of the external rotor brushless motor according to any one of claims 6 or 7, characterized in that: One or more locating pins are integrally formed on the reinforcing ring.

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