An integrated housing for a permanent magnet external rotor motor of an industrial fan.

Abstract

This utility model proposes an integrated housing for a permanent magnet external rotor motor of an industrial fan. Its key feature is that it includes an integrally formed bottom cover and a cylindrical side body, which are connected to the fixed shaft of the permanent magnet external rotor motor. This utility model employs an integral aluminum alloy die-casting process for the cylindrical side body and bottom cover. After die-casting, no secondary heat treatment is required; the workpiece achieves structural stability after natural cooling following demolding, facilitating machining.

Description

Technical Field

[0001] This utility model relates to an integrated housing for a permanent magnet external rotor motor of an industrial fan. Background Technology

[0002] In the current industrial fan manufacturing industry, the bottom cover and columnar side body are typically connected by screws, and the existing outer casing is made of carbon steel. First, carbon steel casings have poor heat dissipation during motor operation; second, the motor casings are relatively thin, typically 8-12 mm thick, and tend to exhibit ellipticity after processing; third, the screw connection between the casing and the bottom cover causes the upper and lower covers of the motor to be misaligned due to the ellipticity of the casing, resulting in malfunctions. This existing material and processing method requires at least two heat treatments for the carbon steel casing, increasing environmental pressure, resulting in high processing costs, complex machining and clamping processes, and long manufacturing times and high expenses. Utility Model Content

[0003] In order to overcome the problems of the prior art, this utility model provides an integrated housing for a permanent magnet external rotor motor of an industrial fan.

[0004] This utility model provides the following technical solution:

[0005] An integrated housing for a permanent magnet external rotor motor of an industrial fan, characterized in that it includes an integrally formed bottom cover and a cylindrical side body, wherein the integrally formed bottom cover and the cylindrical side body are connected to the fixed shaft of the permanent magnet external rotor motor.

[0006] Furthermore, the bottom cover is provided with a groove to engage with the rotating bearing of the permanent magnet motor shaft, and the outer edge of the cylindrical side body is provided with several screw holes for bolt connection with the motor top cover.

[0007] Furthermore, the one-piece molded bottom cover and columnar side body are made of aluminum alloy.

[0008] Furthermore, the bottom cover is circular, the cylindrical side body is cylindrical, the diameter of the bottom cover is 130-540mm, and the height of the cylindrical side body is 35-145mm.

[0009] Furthermore, a ring of strip-shaped permanent magnets is provided inside the cylindrical side body.

[0010] By adopting the above technical solution, this utility model has the following beneficial effects:

[0011] (1) The integrated shell structure of the permanent magnet external rotor motor of the industrial fan of this utility model is relatively simple, can be used in any environment, will not affect the surrounding environment, is highly practical, is conducive to widespread use, and has high economic benefits.

[0012] (2) This utility model adopts an integral aluminum alloy die casting of column-shaped side body and bottom cover. After the aluminum alloy is die-cast, no secondary heat treatment is required. After the die casting is demolded, it cools naturally and the workpiece reaches the structural stability, which is conducive to machining.

[0013] (3) The unique stability of aluminum alloy materials is unmatched by ferrous metals. They are lightweight and have fast thermal conductivity. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the integrated housing of the permanent magnet motor for the industrial ceiling fan of this utility model;

[0015] Wherein: 1-outer shell, 11-bottom cover, 12-side cover, 13-groove, 14-screw hole, 15-bar magnet. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the structural diagrams and specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model.

[0017] Example 1

[0018] This utility model provides an integrated housing 1 for a permanent magnet external rotor motor of an industrial fan, as shown in the figure. It includes an integrally formed bottom cover 11 and a cylindrical side body 12, which are connected to the fixed shaft of the permanent magnet external rotor motor. The integrally formed bottom cover and side cover are made of aluminum alloy and are formed by die casting in one step.

[0019] The bottom cover has a groove 13 for the rotating bearing of the permanent magnet external rotor motor shaft to be engaged, and the upper edge of the cylindrical side body has several screw holes 14 for bolt connection with the motor cover.

[0020] A ring of bar-shaped permanent magnets is installed inside the cylindrical side body: it generates a stable magnetic field, produces torque, maintains rotation, and improves efficiency and stability.

[0021] The bottom cover is circular, and the cylindrical sides are cylindrical. The diameter of the bottom cover is... The height of the cylindrical side body is 35–145 mm. The overall shell structure is adapted to the shape of the permanent magnet external rotor motor.

[0022] This utility model adopts an integrated die-cast structure, making full use of the low density, high specific strength, and good mechanical properties of aluminum alloy die-casting material at both high and low temperatures, especially its excellent impact toughness, good electrical and thermal conductivity, good machinability, and a chemically stable, dense alumina film on its surface. Therefore, most aluminum alloys exhibit good corrosion resistance in fresh water, seawater, nitrates, and various organic substances. However, this alumina film can be destroyed by chloride and alkali ions. It also possesses good die-casting performance, good surface roughness, and low heat transfer.

[0023] The embodiments described above are merely illustrative of the implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An integrated housing for a permanent magnet external rotor motor of an industrial fan, characterized in that, It includes an integrally formed bottom cover and a cylindrical side body, which are connected to the fixed shaft of the permanent magnet external rotor motor. The integrally formed bottom cover and cylindrical side body are made of aluminum alloy.

2. The integrated housing of the permanent magnet external rotor motor of the industrial fan according to claim 1, characterized in that, The bottom cover has a groove that engages with the rotating bearing of the permanent magnet motor shaft, and the outer edge of the cylindrical side body has several screw holes for bolt connection with the motor top cover.

3. The integrated housing of the permanent magnet external rotor motor of the industrial fan according to claim 1, characterized in that, The bottom cover is circular, and the cylindrical side body is cylindrical. The diameter of the bottom cover is 130-540mm, and the height of the cylindrical side body is 35-145mm.

4. The integrated housing of the permanent magnet external rotor motor of the industrial fan according to claim 1, characterized in that, A ring of bar-shaped permanent magnets is provided inside the cylindrical side body.

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