High-reliability outer rotor motor end cover

Abstract

The utility model relates to a high-reliability external rotor motor end cover, which belongs to the technical field of motor end covers, and comprises an inner container and a reinforcing part used for improving the strength of the inner container, the reinforcing part comprises a first block body and a second block body which are symmetrically arranged on the two sides of the inner container, and a mounting through hole used for mounting a motor base is formed in the reinforcing part in a penetrating manner; the mounting through hole penetrates through the inner container, the inner container is made of cast iron materials, and the reinforcing part is made of aluminum alloy materials. The cost of the motor end cover is reduced, and the strength of the joint of the end cover and the motor base is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of motor end covers, and in particular to a highly reliable external rotor motor end cover. Background Technology

[0002] The motor housing is an important component of the electric motor, usually made of aluminum alloy. Its main function is to protect the various internal components of the motor from corrosion and damage from the external environment. The motor housing includes the casing, end covers and tail covers respectively located on both sides of the casing. The end covers have a base for mounting the stator core. The motor shaft is coaxially mounted inside the base, and a bearing is installed between the motor shaft and the base.

[0003] In the existing technology, the end cover and the base are usually integrally formed by die casting aluminum. However, in actual use, it has been found that motor end covers made in this way are not only more expensive, but the connection between the end cover and the base is also prone to breakage. Utility Model Content

[0004] In order to reduce the cost of the motor end cover while improving the strength of the connection between the end cover and the frame, this application provides a highly reliable external rotor motor end cover.

[0005] This application provides a high-reliability external rotor motor end cover, which adopts the following technical solution:

[0006] A high-reliability external rotor motor end cover includes an inner liner and a reinforcing part for improving the strength of the inner liner. The reinforcing part includes a first block and a second block symmetrically arranged on both sides of the inner liner. The reinforcing part has a through hole for mounting a base, which penetrates the inner liner.

[0007] By adopting the above technical solution, the first block and the second block cooperate to provide support for the inner liner, making the inner liner less prone to deformation. The base and the motor end cover are fixed by press fitting. The contact area between the base and the motor end cover is equal to the thickness of the reinforcing part and the inner liner as a whole. While ensuring the strength of the inner liner, the connection strength between the base and the motor end cover is improved, making the base less prone to breakage due to the rotation of the motor shaft.

[0008] Preferably, a plurality of connecting posts are provided between the first block and the second block, and the two ends of the connecting posts are respectively connected to the first block and the second block. A plurality of connecting through holes are provided on the inner liner for the connecting posts to pass through, and the connecting posts are fitted to the inner walls of the connecting through holes.

[0009] By adopting the above technical solution, the connecting column and the connecting through hole are matched to fix the reinforcing part on the inner liner, ensuring the reliability and strength of the reinforcing part fixed on the inner liner. The connecting column and the reinforcing part are integrally formed. In the actual production process, the connecting through hole and the inner liner are integrally formed, and then the reinforcing part can be directly die-cast on the inner liner, which effectively improves the production efficiency of the motor end cover.

[0010] Preferably, the first block has multiple weight-reducing cavities on the side opposite to the inner liner, and the multiple weight-reducing cavities are arranged in a circular array with the axis of the inner liner as the center.

[0011] By adopting the above technical solution and setting up a weight reduction cavity, the cost of the motor end cover can be reduced while ensuring the strength of the first block.

[0012] Preferably, the reinforcing part is also provided with a plurality of through holes penetrating the inner liner, and the plurality of through holes are arranged in a circumferential array with the axis of the mounting through holes as the center. The second block is provided with a fitting cavity for the nut to be fitted on the side opposite to the inner liner.

[0013] By adopting the above technical solution, the fitting cavity facilitates the installation and fixing of the nut, allowing the motor end cover to be fixed to other components by bolts, which facilitates the installation of the motor end cover and eliminates the need to drill additional holes in the motor end cover.

[0014] Preferably, the inner liner is made of cast iron, and the reinforcing part is made of aluminum alloy.

[0015] By adopting the above technical solution, cast iron has a lower cost and can improve the stability of the motor's magnetic field to a certain extent compared to aluminum alloy. Aluminum alloy has the advantages of being lightweight and having good heat dissipation. The combination of the two can reduce the cost and weight of the motor end cover while improving the heat dissipation performance and the stability of the motor's magnetic field.

[0016] Preferably, the thickness of the inner liner is 1 mm.

[0017] By adopting the above technical solution, if the inner liner is too thick, it will increase the cost of the motor end cover and increase the overall weight of the motor end cover. If it is too thin, it will affect the service life of the motor end cover. The thickness of the inner liner should be controlled so that it can achieve the required strength while saving materials.

[0018] Preferably, the portion of the reinforcing part located between two adjacent mating through holes tapers toward the mating through holes.

[0019] By adopting the above technical solution, on the one hand, the material used in the reinforcing part is reduced, thus lowering the production cost and the weight of the motor end cover; on the other hand, the coverage area between the reinforcing part and the inner liner is reduced, thereby improving the heat dissipation performance of the motor end cover.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. The reinforcing part provides support for the inner liner, making the inner liner less prone to deformation. The base and the motor end cover are fixed by press fitting. The contact area between the base and the motor end cover is the thickness of the reinforcing part and the inner liner as a whole. While ensuring the strength of the inner liner, the connection strength between the base and the motor end cover is improved, making the base less prone to breakage due to the rotation of the motor shaft.

[0022] 2. The inner liner is made of cast iron, and the reinforcing part is made of aluminum alloy. Cast iron has a lower cost and can improve the stability of the motor's magnetic field to a certain extent compared to aluminum alloy. Aluminum alloy has the advantages of being lightweight and having good heat dissipation. The combination of the two can reduce the cost and weight of the motor end cover while improving the heat dissipation performance and the stability of the motor's magnetic field. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the internal structure of the inner liner in an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the inner liner in an embodiment of this application.

[0026] Figure 4 This is a cross-sectional view of the overall structure in the embodiments of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Inner liner; 2. Reinforcing part; 21. First block; 211. Weight reduction cavity; 22. Second block; 221. Fitting cavity; 23. Mounting through hole; 24. Mating through hole; 25. Connecting post; 251. Connecting through hole. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-4 The present invention will be described in further detail below.

[0029] This application discloses a high-reliability external rotor motor end cover, referring to... Figure 1 and Figure 2The device includes an inner liner 1 and a reinforcing part 2 for enhancing the strength of the inner liner 1. The reinforcing part 2 includes a first block 21 and a second block 22 symmetrically arranged on both sides of the inner liner 1. The first block 21 and the second block 22 cooperate to provide support for the inner liner 1, making the inner liner 1 less prone to deformation. The reinforcing part 2 is provided with a through hole 23 for mounting the base. The through hole 23 penetrates the inner liner 1. The base and the motor end cover are fixed by press fitting. The contact area between the base and the motor end cover is equal to the overall thickness of the reinforcing part 2 and the inner liner 1. While ensuring the strength of the inner liner 1, the connection strength between the base and the motor end cover is improved, making the base less prone to breakage due to the rotation of the motor shaft.

[0030] The inner liner 1 is made of cast iron, while the reinforcing part 2 is made of aluminum alloy. Cast iron is less expensive and, compared to aluminum alloy, can improve the stability of the motor's magnetic field to a certain extent. Aluminum alloy, on the other hand, has advantages such as being lightweight and having good heat dissipation. Combining the two can reduce the cost and weight of the motor end cover while improving the heat dissipation performance and magnetic field stability of the manufactured motor. The inner liner 1 is 1 mm thick. If the inner liner 1 is too thick, it will increase the cost and overall weight of the motor end cover; if it is too thin, it will affect the service life of the motor end cover.

[0031] Reference Figure 1 and Figure 2 The reinforcing part 2 is also provided with multiple through holes 24 penetrating the inner liner 1. The multiple through holes 24 are arranged in a circular array with the axis of the mounting through hole 23 as the center. The number of through holes 24 depends on the area of ​​the end face of the inner liner 1. The second block 22 is provided with a fitting cavity 221 for the nut to be fitted on the side opposite to the inner liner 1. After the nut is embedded in the fitting cavity 221 and fixed by adhesive, the motor end cover can be fixed with other parts by bolts, which facilitates the installation of the motor end cover and does not require additional holes to be opened on the motor end cover.

[0032] Reference Figure 1 and Figure 2 The portion of the reinforcing part 2 located between two adjacent mating through holes 24 shrinks toward the mating through holes 24. On the one hand, this reduces the material used in the reinforcing part 2, thereby reducing production costs and the weight of the motor end cover. On the other hand, it reduces the coverage area between the reinforcing part 2 and the inner liner 1, thereby improving the heat dissipation performance of the motor end cover.

[0033] Reference Figure 3 and Figure 4Multiple connecting posts 25 are provided between the first block 21 and the second block 22. The number of connecting posts 25 depends on the area of ​​the reinforcing part 2 that is in contact with the inner liner 1. The arrangement of the connecting posts 25 is adapted to the shape of the reinforcing part 2. The two ends of the connecting posts 25 are fixed to the first block 21 and the second block 22 respectively. The connecting posts 25 and the reinforcing part 2 are integrally formed. Multiple connecting through holes 251 are provided through the inner liner 1 for the connecting posts 25 to pass through. The connecting posts 25 are in contact with the inner wall of the connecting through holes 251. The connecting posts 25 and the connecting through holes 251 cooperate to fix the reinforcing part 2 on the inner liner 1 and ensure the reliability and strength of the reinforcing part 2 fixed on the inner liner 1.

[0034] Reference Figure 1 and Figure 4 The first block 21 has multiple weight-reducing cavities 211 on the side opposite to the inner liner 1. These cavities are arranged in a circular array around the axis of the inner liner 1. In this embodiment, there are eighteen weight-reducing cavities. By setting up the weight-reducing cavities 211, the cost of the motor end cover can be reduced while ensuring the strength of the first block 21. In actual production, the connecting through hole 251 is integrally formed with the inner liner 1, and then the reinforcing part 2 can be directly die-cast onto the inner liner 1, effectively improving the production efficiency of the motor end cover.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-reliability external rotor motor end cover, characterized in that, It includes an inner liner (1) and a reinforcing part (2) for enhancing the strength of the inner liner (1). The reinforcing part (2) includes a first block (21) and a second block (22) symmetrically arranged on both sides of the inner liner (1). The reinforcing part (2) has a through hole (23) for mounting a base, which penetrates the inner liner (1).

2. The external rotor motor end cover according to claim 1, characterized in that, A plurality of connecting posts (25) are provided between the first block (21) and the second block (22). The two ends of the connecting posts (25) are respectively connected to the first block (21) and the second block (22). A plurality of connecting through holes (251) are provided on the inner liner (1) for the connecting posts (25) to pass through. The connecting posts (25) are fitted to the inner wall of the connecting through holes (251).

3. The external rotor motor end cover according to claim 2, characterized in that, The first block (21) has multiple weight-reducing cavities (211) on the side away from the inner liner (1), and the multiple weight-reducing cavities (211) are arranged in a circular array with the axis of the inner liner (1) as the center.

4. The external rotor motor end cover according to claim 3, characterized in that, The reinforcing part (2) is also provided with a plurality of through holes (24) penetrating the inner liner (1). The plurality of through holes (24) are arranged in a circular array with the axis of the mounting through hole (23) as the center. The second block (22) is provided with a fitting cavity (221) for the nut to be fitted on the side opposite to the inner liner (1).

5. The external rotor motor end cover according to claim 1, characterized in that, The inner liner (1) is made of cast iron, and the reinforcing part (2) is made of aluminum alloy.

6. The external rotor motor end cover according to claim 1, characterized in that, The inner liner (1) has a thickness of 1 mm.

7. The external rotor motor end cover according to claim 4, characterized in that, The portion of the reinforcing part (2) located between two adjacent mating through holes (24) tapers toward the mating through hole (24).

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