A housing structure of an electric machine and an electric machine

Abstract

The application discloses a shell structure of a motor, which comprises an end cover, a middle shell and a rear cover, the middle shell comprises a first shell and a second shell, the first shell is provided with a support structure, and the middle shell is integrally formed in plastic material. The motor shell in the application is formed by using an injection molding process, so that the processing cost is reduced, the post-processing cost is reduced, the degree of freedom of the injection molding is high, the integration degree of the shell is high, the number of installed parts and the installation process are reduced, the assembly process is simplified, the production efficiency is improved, and meanwhile, the high integration degree improves the coaxiality between the parts of the shell.

Description

Technical Field

[0001] This invention belongs to the field of motor technology, specifically relating to a motor housing structure and a motor. Background Technology

[0002] Most existing motor housings are made of metal, making it difficult to achieve one-piece molding to meet the precision requirements. Therefore, they are mostly manufactured using profile extrusion combined with computer-controlled precision machining (CNC machining), with main equipment including lathes, milling machines, and boring and milling machines. In this case, the motor housing needs to be divided into several parts, such as the drive plate bracket, and for motors with planetary structures, additional internal gear rings are required. Assembly is then performed after each part is machined.

[0003] In the existing technology, the motor housing profile requires post-processing after extrusion, the assembly process is relatively complicated, the production cycle is long, the post-processing cost is high, and the coaxiality between the various parts of the housing is poor. Summary of the Invention

[0004] To overcome the above-mentioned technical problems, the present invention aims to provide a motor housing made of plastic material, specifically achieved through the following technical solution: A housing structure for an electric motor, the housing including an end cover, a middle shell, and a rear cover, the middle shell including a first shell and a second shell, the first shell having a support structure, and the middle shell being integrally molded from plastic material.

[0005] Optionally, the second housing is provided with an internal gear ring, which is integrally formed with the middle housing.

[0006] Optionally, the support structure is provided with a bearing chamber.

[0007] Optionally, the middle shell includes a bearing, and the bearing and the middle shell are integrally formed by insert injection molding.

[0008] Optionally, the middle shell is provided with connection holes at both ends.

[0009] Optionally, the middle shell is provided with reinforcing ribs.

[0010] Optionally, the first housing is provided with positioning posts.

[0011] Optionally, the middle shell is detachably connected to the end cap, and the middle shell is detachably connected to the rear cover.

[0012] Optionally, the plastic material is a nylon composite material.

[0013] This application also provides an electric motor, including the housing structure described in any of the above technical solutions.

[0014] Compared with the prior art, this application has the following beneficial effects: The motor housings in this application are all manufactured using injection molding, which reduces processing costs and post-processing costs. Injection molding offers greater flexibility and higher integration of the housing, reducing the number of installation parts and installation steps, simplifying the assembly process, and improving production efficiency. At the same time, the higher integration also improves the coaxiality between the various components of the housing. Attached Figure Description

[0015] Figure 1 This is a perspective view of the housing structure of the motor described in Example 1; Figure 2 This is a perspective view of the shell described in Example 1; Figure 3 This is another perspective view of the shell described in Example 1; Figure 4 This is a front view of the shell described in Example 1; Figure 5 This is a rear view of the shell described in Example 1; Figure 6 This is a perspective view of the shell described in Example 2; Figure 7 This is a partial exploded view of a shutdown motor as described in Example 3.

[0016] In the figure, the reference numerals are: 1-end cover, 2-middle shell, 3-rear cover, 4-first shell, 5-second shell, 6-support structure, 7-internal gear ring, 8-bearing chamber, 9-bearing, 10-connecting hole, 11-reinforcing rib, 12-positioning post. Detailed Implementation

[0017] The following detailed embodiments illustrate the specific implementation of this application. However, these specific implementations are not intended to limit the technical solutions of this application. Any non-substantial changes made by those skilled in the art, such as substitutions for common technical solutions in the field, using the technical solutions described in the embodiments of this application, are all within the scope of protection of this application. It should be noted that the terms "first," "second," etc., in this application are only used to distinguish different positions of components and have no other meaning such as sequence. It should also be noted that "material skimming" refers to reducing the amount of adhesive or uniform material distribution. In the design and manufacturing process of injection molding or die-casting molds, in order to make the material thickness of parts as consistent as possible or to meet other thickness requirements, it is necessary to reduce material (adhesive), cut less material, or reduce adhesive in areas where the material is thicker. Those skilled in the art should understand this. Example 1

[0018] like Figures 1-5The motor housing structure includes an end cover 1, a middle shell 2, and a rear cover 3. The middle shell 2 includes a first shell 4 and a second shell 5. The first shell 4 is provided with a support structure 6. The middle shell 2 is integrally molded from plastic. The support structure 6 serves to limit the stator position during assembly and can also be adapted to the motor drive board for supporting its installation. Furthermore, those skilled in the art can reduce material usage during the molding of the middle shell 2 according to actual processing or performance requirements.

[0019] In this embodiment, the second housing 5 is provided with an internal gear ring 7, which is integrally formed with the middle housing 2. In other embodiments, the component integrally formed with the middle housing 2 is selected according to the specific structure of the motor.

[0020] In this embodiment, the support structure 6 is provided with a bearing chamber 8. In other embodiments, the bearing chamber 8 may not be provided on the support structure 6, but may be provided in other places according to actual needs, such as on the back cover 3.

[0021] In this embodiment, the middle shell 2 is provided with connecting holes 10 at both ends for connecting the end cover 1 and the rear cover 3.

[0022] In this embodiment, the middle shell 2 is provided with reinforcing ribs 11 to improve the strength of the middle shell 2. In addition, the reinforcing ribs 11 increase the contact area between the middle shell 2 and the air, which can improve the heat dissipation effect to a certain extent.

[0023] In this embodiment, the first housing 4 is provided with a positioning post 12 to facilitate the connection between the middle housing 2 and the rear cover 3 during assembly.

[0024] In this embodiment, the middle shell 2 is detachably connected to the end cover 1, and the middle shell 2 is detachably connected to the rear cover 3. The detachable connection method is a threaded connection. In other embodiments, a snap-fit ​​connection method can also be used.

[0025] In this embodiment, the plastic material is a nylon composite material, which is a composite material of nylon and glass fiber. The motor housing using the composite material is about 30% lighter than the aluminum housing. Example 2

[0026] like Figure 6 The same parts of the motor housing structure as in Embodiment 1 will not be described again. The difference is that in this embodiment, the middle shell 2 includes a bearing 9. The bearing 9 and the middle shell 2 are integrally formed by insert injection molding to avoid the problem of deformation of the middle shell 2 during the process of pressing the bearing 9 into the bearing chamber 8. Example 3

[0027] like Figure 7The aforementioned joint motor includes the motor housing structure described in Embodiment 1. Other embodiments may also include the motor housing structure described in Embodiment 2.

Claims

1. A housing structure for an electric motor, characterized in that, The housing includes an end cap, a middle shell, and a rear cap. The middle shell includes a first shell and a second shell. The first shell is provided with a support structure. The middle shell is integrally molded from plastic material.

2. The housing structure of an electric motor according to claim 1, characterized in that, The second housing is provided with an internal gear ring, which is integrally formed with the middle housing.

3. The housing structure of an electric motor according to claim 1, characterized in that, The support structure is equipped with a bearing chamber.

4. The housing structure of an electric motor according to claim 1, characterized in that, The middle shell includes a bearing, and the bearing and the middle shell are integrally formed by insert injection molding.

5. The housing structure of an electric motor according to claim 1, characterized in that, The middle shell has connection holes at both ends.

6. The housing structure of an electric motor according to claim 1, characterized in that, The middle shell is provided with reinforcing ribs.

7. The housing structure of an electric motor according to claim 1, characterized in that, The first housing is equipped with a positioning post.

8. The housing structure of an electric motor according to claim 1, characterized in that, The middle shell is detachably connected to the end cap, and the middle shell is detachably connected to the rear cover.

9. The housing structure of an electric motor according to claim 1, characterized in that, The plastic material is a nylon composite material.

10. An electric motor, characterized in that, The motor includes the housing structure described in any one of claims 1 to 9.

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