Air-cooled external rotor motor

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By designing an air-cooled structure in the outer rotor motor and using a fan to realize the inlet and outflow of cooling air, the problem of lack of cooling measures in the existing outer rotor motor is solved, and the low-cost and long-life motor cooling effect is achieved.

CN222464365UActive Publication Date: 2025-02-11韩同现

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Patent Information

Application Number: CN202421186900.5
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-05-28
Publication Date: 2025-02-11
Estimated Expiration: 2034-05-28

AI Technical Summary

Technical Problem

Existing external rotor motors either lack cooling measures to cause overheating, or are complex and expensive water-cooled designs.

Method used

An air-cooled outer rotor motor is designed. By setting air inlet holes between the stator and the rotor and a fan is provided at the inlet end of the rotor, the fan is used to realize the inlet and outflow of cooling air, and the natural cooling of the motor is achieved.

Benefits of technology

It realizes low-cost cooling of the motor, extends the service life of the motor, and avoids the problems of complex structure and high prices.

✦ Generated by Eureka AI based on patent content.

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Abstract

An air-cooled external rotor motor is composed of a stator (1) and a rotor (2), the stator (1) is fixed on a support (3) through a stator shaft (1-1), the rotor (2) is rotatably fixed with the stator shaft (1-1) through a bearing (5) and a bearing cover (4), one end of the stator shaft (1-1) is provided with a blind hole, the bottom of the blind hole reaches a gap between the stator (1) and the rotor (2), and the bottom of the blind hole is provided with a hole leading to the gap between the stator (1) and the rotor (2). A fan is arranged on the end cover at the air inlet end of the rotor (2), an air outlet is formed in the end cover at the air outlet end of the rotor (2), cooling air flows out of the air outlet from the air inlet through the fan, and the bearing cover (4) at one end is integrated with the output wheel. Compared with the prior art, the motor has the advantages of simple structure, low cost, cooling function and long service life.

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Description

Technical Field

[0001] The utility model relates to an outer rotor motor, in particular to an air-cooled outer rotor motor. Background Art

[0002] As we all know, the outer rotor motors currently available on the market either have no cooling measures or are water-cooled outer rotor motors with a relatively complex design. The disadvantage of outer rotor motors without cooling measures is that the motors are prone to heat up and overheat after long-term operation, causing motor damage. Water-cooled outer rotor motors have complex structures and are expensive. Therefore, designing a low-cost air-cooled outer rotor motor is a technical problem that needs to be solved at present. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a low-cost air-cooled outer rotor motor.

[0004] The technical solution of the utility model to solve the technical problem is:

[0005] The air-cooled outer rotor motor is composed of a stator and a rotor. The stator is fixed to the bracket through the stator shaft, and the rotor is rotatably fixed to the stator shaft through bearings and bearing caps. A blind hole is provided at one end of the stator shaft, and the bottom of the blind hole reaches the gap between the stator and the rotor. A hole leading to the gap between the stator and the rotor is provided at the bottom of the blind hole, and the hole is an air inlet and a wire inlet. A fan is provided on the end cover of the air inlet end of the rotor, and an air outlet is provided on the end cover of the air outlet end. The fan is used to realize cooling air flowing out of the air inlet hole and then out of the air hole. The bearing cap at one end is integral with the output wheel.

[0006] Compared with the prior art, the utility model has a simple structure, a low price, a cooling function, and a long service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0008] As shown in the figure, the air-cooled outer rotor motor is composed of a stator 1 and a rotor 2. The stator 1 is fixed on the bracket 3 through the stator shaft 1-1. The rotor 2 is rotatably fixed to the stator shaft 1-1 through the bearing 5 and the bearing cover 4. A blind hole is provided at one end of the stator shaft 1-1. The bottom of the blind hole reaches the gap between the stator 1 and the rotor 2. A hole leading to the gap between the stator 1 and the rotor 2 is provided at the bottom of the blind hole. The hole is an air inlet and a wire inlet. A fan is provided on the end cover of the air inlet end of the rotor 2, and an air outlet is provided on the end cover of the air outlet end. The cooling air flows out from the air inlet hole and then out of the air hole through the fan. The bearing cover 4 at one end is integral with the output wheel.

Claims

1. An air-cooled external rotor motor, comprising a stator (1) and a rotor (2), wherein the stator (1) is fixed to a bracket (3) via a stator shaft (1-1), and the rotor (2) is rotatably fixed to the stator shaft (1-1) via a bearing (5) and a bearing cover (4), and wherein: A blind hole is provided at one end of the stator shaft (1-1), the bottom of the blind hole reaching the gap between the stator (1) and the rotor (2), and a hole leading to the gap between the stator (1) and the rotor (2) is provided at the bottom of the blind hole, the hole being an air inlet and a wire inlet. A fan is provided on the end cover at the air inlet end of the rotor (2), and an air outlet is provided on the end cover at the air outlet end. The fan is used to allow cooling air to flow out of the air inlet and then out of the air outlet, and a bearing cover (4) at one end is integral with the output wheel.