Motor with improved rear cap bearing support construction

Abstract

The invention discloses an electric motor with a bearing seat structure of an improved rear end cover, which comprises a shell, a rear end cover is installed on the shell, a bearing chamber is arranged on the rear end cover, a bearing is installed in the bearing chamber and is connected with a rotating axle, a radial O-shaped ring pit slot is arranged on the inner wall of the bearing chamber, an O-shaped ring is arranged in the pit slot, and the outer wall of the bearing is closely matched with the O-shaped ring. Since the rubber O-shaped ring device is arranged in the bearing chamber of the rear end cover, therefore, the sealing performance is good; a pit slot is arranged on a bearing chamber 3; the processing technology is simple, and the cost is low.

Description

technical field [0001] The invention relates to a motor technology, in particular to a motor with an improved rear end cover bearing seat structure. Background technique [0002] The design of the bearing and the rear end cover of the traditional motor is as follows: figure 1 As shown, the fit is a transition fit, and the inner wall of the bearing chamber 3 on the rear end cover 2 is smooth. Due to the influence of the precision of the machining equipment and the tolerance of the outer diameter of the bearing, the bearing and the end cover are loosely fitted during actual assembly. Caused the following phenomena that affect product quality: [0003] 1. The seal is poor, and water and dust can easily enter the motor from the gap between the bearing and the end cover. [0004] 2. The bearing and the end cover slip when rotating, causing the vibration and noise of the motor to increase, especially when the motor is heating up, it is more serious. [0005] 3. The movement of ...

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Problems solved by technology

[0002] The design of the bearing and the rear end cover of the traditional motor is as follows: figure 1 As shown, the fit is a transition fit, and the inner wall of the bearing chamber 3 on the rear end cover 2 is smooth. Due to the influence of the precision of the machining equipment and the tolerance of the outer diameter of the bearing, the bearing and the end cover are loosely fitted during actual assembly. Caused the following phenomena that affect product quality:

[0003] 1. Poor sealing, water and dust can easily enter the motor from the gap between the bearing and the end cover

[0004] 2. The bearing and the end cover slip when rotating, causing the vibration and noise of the motor to increase, especially when the motor is heating up, it is more serious

[0005] 3. The movement of the motor shaft extension accelerates the wear of the bearing and causes the movement noise of the rotor

[0006] The above situation has seriously affected the quality of the motor, and the grade cannot be improved, which eventually leads to the shortening of the life of the motor

[0007] In addition, there are also some motors that use the method of installing a sealing ring on the bearing to seal the connection between it and the inner wall of the bearing chamber. However, this structure requires high machining accuracy on the bearing, and it is difficult to implement or the cost is high.

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