Heat dissipation structure for motor or fan

Abstract

The invention discloses a heat dissipation structure for a motor or a fan. The heat dissipation structure comprises a stator assembly, a rotor, a control panel, a bearing, a metal middle pipe, a magnet and a cooling fin, wherein the rotor is of a barrel-shaped structure; a rotating shaft is arranged in the middle of the barrel bottom of the rotor; the control panel is connected with the stator assembly; the stator assembly is arranged in the rotor; the metal middle pipe is fixedly arranged in the middle of the stator assembly; the bearing is fixedly arranged in the metal middle pipe; the rotating shaft of the rotor is inserted into the metal middle pipe and is fixedly connected with an inner ring of the bearing; the magnet is of an annular structure and is arranged on the inner barrel surface of the rotor and located between the rotor and the stator assembly; a rotating gap is formed between the upper surface of the stator assembly and the barrel bottom of the rotor; and the cooling fin is arranged in the rotating gap and is connected with the metal middle pipe. The heat dissipation structure is simple; and the heat dissipation area of the metal middle pipe is greatly enlarged through the cooling fin, so that heat of the bearing and the metal middle pipe can be quickly taken away, the temperature of the bearing can be reduced, and the service life of the bearing can be prolonged.

Description

technical field [0001] The invention relates to the technical field of motors and fans, in particular to a heat dissipation structure for motors or fans. Background technique [0002] Existing fans and motors, especially brushless motors and fans, include a stator assembly, a rotor, bearings, a metal middle tube, magnets and a control board. The control board is connected to the stator assembly, and the rotor is a barrel-shaped structure. The middle part of the bottom is provided with a rotating shaft, the stator assembly is arranged in the rotor, the metal middle tube is fixed in the middle of the stator assembly, the bearing is fixed in the metal middle tube, the rotor shaft is inserted in the metal middle tube and fixedly connected with the inner ring of the bearing , the magnet is an integral ring or a ring formed by winding, which is arranged between the inner surface of the rotor and the outer surface of the stator. When the coil of the stator assembly is energized, it...

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Problems solved by technology

[0002] Existing fans and motors, especially brushless motors and fans, include a stator assembly, a rotor, bearings, a metal middle tube, magnets and a control board. The control board is connected to the stator assembly. The rotor is a barrel-shaped structure. There is a rotating shaft in the middle of the bottom, the stator assembly is installed in the rotor, the metal middle tube is fixed in the middle of the stator assembly, the bearing is fixed in the metal middle tube, the rotor shaft is inserted in the metal middle tube and fixedly connected with the inner ring of the bearing , the magnet is an integral ring or a ring formed by winding, which is arranged between the inner barrel surface of the rotor and the outer surface of the stator. The coil of the stator assembly rotates under the magnetic field of the magnet when it is energized. The control board is used to control the stator. The current generated by the coil on the component makes the rotor rotate smoothly and stably through the shaft; however, during the operation of the motor or fan, the coil and silicon steel sheet of the stator component will generate a lot of heat, which will be conducted to the metal middle tube and Bearings, which increase the temperature of the metal tube and bearings, thereby affecting the service life of the bearings

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