CN111371271B

CN111371271B - Plastic package method for DDM stator and rotor

Info

Publication number: CN111371271B
Application number: CN202010283401.8A
Authority: CN
Inventors: 江林飞; 孙豪远; 汪旭亮
Original assignee: Zhejiang Yongchang Electric Corp
Current assignee: Zhejiang Yongchang Electric Corp
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2022-03-22
Anticipated expiration: 2040-04-13
Also published as: CN111371271A

Abstract

The invention discloses a stator and a rotor of plastic package electronics, and aims to provide a plastic package method of a DDM stator and a rotor, which comprises a stator body and a rotor body, wherein the rotor body is arranged outside the rotor body; the processing of the stator body and the rotor body comprises the following steps: a stator body: the stator body is composed of a plurality of stator iron cores, the stator iron cores are formed by punching linear strips, and the plurality of stator iron cores are bent and spliced to form the stator body; placing the stator core body into a mold for injection molding after winding; a rotor body: and putting the rotor body into a mold for injection molding. Compared with the traditional process, the one-step molding of the stator slot, the mounting flange and the stator body by adopting PBT plastic coating improves the efficiency and saves the cost.

Description

Plastic package method for DDM stator and rotor

Technical Field

The invention relates to the technical field of motors, in particular to a plastic package method for a DDM stator and a rotor.

Background

At present, the application of plastic package motors is more and more extensive. The plastic package motor mainly comprises a plastic package stator, a shaft, a rotor, a bearing, an end cover, a thermal protector, a lead-out wire, a socket and the like. The conventional process is to adopt PBT plastic package for winding stator slot insulation and then use BMC plastic package again. When plastic packaging is performed through BMC, the rejection rate is relatively high, and the manufacturing cost of the motor is increased.

BMC belongs to thermosetting materials, is low in strength, and is easy to crack when being subjected to plastic packaging by BMC; PBT belongs to cold-curing materials, has better toughness and can not easily generate the phenomenon of fragmentation.

Therefore, a plastic package method of the DDM stator and the DDM rotor is to be developed, and the PBT is used for plastic package forming, so that the production efficiency can be improved, and the manufacturing cost can be reduced.

Disclosure of Invention

The invention aims to overcome the defects that the plastic package efficiency is low and the manufacturing cost is increased because the plastic package needs to be carried out twice when the plastic package is carried out on the conventional plastic package motor, and provides a plastic package method for a DDM stator and a rotor.

In order to achieve the purpose, the invention adopts the following technical scheme: a plastic package method for a DDM stator and a rotor comprises a stator body and a rotor body, wherein the rotor body is arranged outside the rotor body; the processing of the stator body and the rotor body comprises the following steps:

a stator body: the stator body is composed of a plurality of stator iron cores, the stator iron cores are formed by punching linear strips, and the plurality of stator iron cores are bent and spliced to form the stator body; placing the stator core body into a mold for injection molding after winding;

a rotor body: and putting the rotor body into a mold for injection molding.

Preferably, the stator body is provided with stator slots, and the stator slots are coated on the stator iron core. The stator core is wound, and then the stator slots are formed in the stator core through plastic coating, so that the manufacturing is simpler.

Preferably, the stator body is further provided with a mounting flange, and the mounting flange is wrapped on the stator iron core. The manufacturing of the mounting flange is convenient, and other parts are convenient to connect with the stator body through the flange.

Preferably, the stator body, the stator groove and the mounting flange are all formed through PBT in a one-step plastic package mode. The plastic package process is simple, the plastic package effect is better, and simultaneously, the efficiency is higher and the cost is lower due to one-step plastic package forming.

Preferably, the rotor body is formed by PP plastic molding. The plastic package is simple and the plastic package effect is good.

Preferably, five core sheets are arranged on one stator core, and the five core sheets are bent to form an arc shape; and a splicing interface A and a splicing interface B are respectively arranged at two ends of the stator core. The stator core is bent to form a 120-degree arc shape, and the splicing interfaces A and B arranged at the two ends can be used for facilitating the mutual splicing of the stator core and other stator cores, so that the splicing mode is simpler.

The invention has the following beneficial effects: (1) the stator groove, the mounting flange and the stator body are molded in one step by PBT plastic coating, so that the efficiency is improved, and the cost is saved; (2) the stator core is formed by bending after being stamped by the straight line strips, so that the manufacturing is simpler; (3) the whole stator and rotor structure is simple to manufacture, high in manufacturing efficiency and low in manufacturing cost; (4) compared with the traditional process, the mounting flange and the stator body are subjected to plastic package by adopting PBT, the toughness is better, and the cracking is not easy to occur.

Drawings

FIG. 1 is a schematic view of the stator and rotor of the present invention after they are assembled together;

FIG. 2 is a front view of the stator and rotor of the present invention shown installed together;

FIG. 3 is a schematic structural view of the stator body of the present invention;

FIG. 4 is a schematic structural view of a rotor body of the present invention;

FIG. 5 is a schematic view of a stamped stator core of the present invention;

fig. 6 is a schematic view of a stator core of the present invention after bending;

in the figure: 1-stator body, 2-rotor body, 3-stator core, 4-stator slot, 5-mounting flange, 6-core sheet, 7-splicing interface A, 8-splicing interface B.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

As shown in fig. 1, fig. 2 and fig. 3, a plastic encapsulation method for a DDM stator and a rotor includes a stator body 1 and a rotor body 2, wherein the rotor body 2 is arranged outside the rotor body 2; the processing of the stator body 1 and the rotor body 2 comprises the following steps:

stator body 1: the stator body 1 is composed of a plurality of stator cores 3, the stator cores 3 are formed by punching linear strips, and the plurality of stator cores 3 are bent and spliced to form the stator body 1; the stator core 3 body is placed into a mold for injection molding after being wound; the rotor body 2: the rotor body 2 is placed in a mold for injection molding.

The stator body 1 is provided with stator slots 4, and the stator slots 4 are covered and molded on the stator core 3. The stator slots 4 are formed on the stator core 3 by winding wires on the stator core 3 and then plastic-wrapping the stator core 3, so that the manufacturing is simpler.

The stator body 1 is further provided with a mounting flange 5, and the mounting flange 5 is coated and molded on the stator core 3. The manufacturing of the mounting flange 5 is convenient, and other parts are convenient to connect with the stator body 1 through the flange.

The stator body 1, the stator groove 4 and the mounting flange 5 are all formed through PBT one-step plastic package. The plastic package process is simple, the plastic package effect is better, and simultaneously, the efficiency is higher and the cost is lower due to one-step plastic package forming.

The rotor body 2 is formed through PP plastic package. The plastic package is simple and the plastic package effect is good.

Five iron core sheets 6 are arranged on one stator iron core 3, and the five iron core sheets 6 are bent to be arc-shaped; the two ends of the stator core 3 are respectively provided with a splicing interface A7 and a splicing interface B8. The stator core 3 is bent into a 120-degree arc shape, and the splicing interfaces a7 and B8 at the two ends of the stator core 3 can facilitate the mutual splicing of the stator core 3 and other stator cores 3, so that the splicing mode is simpler.

The processing mode of the invention is as follows: firstly, punching a straight line to form stator cores 3, wherein each stator core 3 is provided with five core sheets 6, as shown in fig. 5; then bending the stator core 3, wherein the bent stator core 3 is in a 120-degree arc shape as shown in fig. 6; then, a stator core 3 body is spliced by a plurality of stator cores 3, as shown in fig. 4; the splicing interfaces A7 and B8 arranged at the two ends of the stator core 3 can be used for better facilitating the splicing between the stator core 3 and the stator core 3.

After the stator core 3 body is processed, the stator core is placed into a die and is subjected to plastic package through PBT, and winding is performed after the plastic package is completed. And placing the rotor body 2 into a mold for plastic package. Finally the rotor body 2 and the stator body 1 are mounted together.

Claims

1. A plastic package method for a DDM stator and a rotor is characterized in that: the stator comprises a stator body (1) and a rotor body (2), wherein the rotor body (2) is arranged outside the stator body (1); the processing of the stator body (1) and the rotor body (2) comprises the following steps:

stator body (1): the stator body (1) is composed of a plurality of stator iron cores (3), the stator iron cores (3) are formed by punching straight lines, and the plurality of stator iron cores (3) are bent and spliced to form the stator body (1); the stator core (3) body is placed into a mold for injection molding after being wound;

rotor body (2): the rotor body (2) is placed into a mold for injection molding;

the stator body (1) is provided with stator slots (4), and the stator slots (4) are coated on the stator core (3);

the stator body (1) is also provided with an installation flange (5), and the installation flange (5) is coated on the stator core (3);

the stator body (1), the stator groove (4) and the mounting flange (5) are all formed through PBT one-step plastic package.

2. The plastic package method for the DDM stator and the rotor as claimed in claim 1, wherein: the rotor body (2) is formed through PP plastic package.

3. The plastic package method for the DDM stator and the rotor as claimed in claim 1, wherein: five iron core sheets (6) are arranged on one stator iron core (3), and the five iron core sheets (6) are bent into the stator iron core (3) and then are arc-shaped; and a splicing interface A (7) and a splicing interface B (8) are respectively arranged at two ends of the stator core (3).