DC motor

Abstract

The invention discloses a DC motor, which comprises a shell body, wherein a front end cover is fixedly installed on the front surface of the shell body, an output shaft is rotatably connected to the middle of the front surface of the shell body in a manner of penetrating through the front end cover, an installation base is welded to the lower surface of the shell body, a rear cover is fixedly installed on the rear surface of the shell body, a stator is fixedly installed on the inner wall of the shell body, a rotor is rotatably installed in the middle of the interior of the stator, an armatureis arranged at one end of the interior of the shell body, and a magnet yoke assembly is arranged at the position, close to the armature, of one end of the interior of the shell body. By arranging a heat dissipation opening sealing device, the problems that a motor is short-circuited and burnt due to the fact that water easily enters a direct-current motor working in a humid environment or outdoorsand is affected with damp, and meanwhile in a factory environment, much dust exists in air and can enter the motor through a heat dissipation net to cause poor heat dissipation are solved, and finally, the ventilation and heat dissipation effects are achieved while the problem of motor burnout is solved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a DC motor. Background technique [0002] DC motor is a motor that converts DC electric energy into mechanical energy. It is widely used in electric drive because of its good speed regulation performance. It is divided into three types: shunt excitation, series excitation and compound excitation. The working principle of DC motor is that when the DC power supply supplies power to the armature winding through the brush, the lower conductor of the N pole on the surface of the armature can flow the current in the same direction. According to the left hand According to the rule, the conductor will be subjected to counterclockwise torque, and the conductor under the S pole on the surface of the armature will also flow the current in the same direction. Similarly, according to the left-hand rule, the conductor will also be subject to counterclockwise torque, so that the entire armature ...

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Problems solved by technology

[0003] In the process of realizing the present invention, the inventor found that at least the following problems in the prior art have not been solved: 1. When the DC motor is in use, it is necessary to install a cooling net and a cooling fan to dissipate heat, and the inside of the DC motor working in a humid environment or outdoors It is easy for water to get wet through the heat dissipation net, causing the motor to be short-circuited and burned. At the same time, in the factory environment, there is a lot of dust in the air, and the dust will enter the motor through the heat dissipation net, resulting in poor heat dissipation, and eventually burn the motor. Indispensable structure, removing the heat dissipation net can realize the sealing of the motor, but it will also lead to poor heat dissipation of the motor; 2. In the prior art, the front cover of the DC motor is usually fixedly connected to the housing by bolts, but when the motor is in use , will produce a large vibration, and after a period of use, the bolts will loosen. In order to ensure safe production, maintenance personnel are required to perform frequent maintenance. The labor cost is large and the use is more inconvenient.

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