Long-service-life miniature gear motor

Abstract

The invention discloses a long-service-life miniature gear motor comprising a stator, a rotor and an end cover. The rotor consists of a rotating shaft, a magnetizer, a commutator, a piezoresistor welded to the commutator, and a winding winding around the magnetizer, wherein the magnetizer and the commutator are fixed at the rotating shaft. The winding and the commutator are connected electrically;and the magnetizer, the winding winding around the magnetizer, the commutator are arranged side by side along the axial direction of the rotating shaft. The stator includes a shell, a magnetic tile fixed at the inner surface of the shell, and a bearing arranged in a bearing room. The end cover consists of an iron cover plate, an intermediate plastic plate riveted to the iron cover plate, and a brush holder assembly installed in the intermediate plastic plate; and the brush holder assembly includes a carbon brush holder, a carbon brush installed at the carbon brush holder, and a damping stripattached to the carbon brush holder. Besides, a two-stage reduction box is arranged at the front end of the shell; and the rotating shaft is meshed with the two-stage reduction box. The commutator ismade of a AgCuNi material and the strontium-titanate voltage-sensitive device is welded to the commutator. According to the invention, on the basis of adjustment of the commutator material, the service life of the gear motor is increased to the great extent.

Description

technical field [0001] The invention relates to the field of motors, in particular to miniature geared motors. Background technique [0002] The geared motor refers to the integration of the reducer and the motor (motor). This integrated body is also commonly referred to as a gear motor or geared motor. Usually, a professional reducer manufacturer conducts integrated assembly and then supplies the complete set. Geared motors are widely used in steel industry, machinery industry, etc. The advantage of using a geared motor is to simplify the design and save space. Among the geared motors, DC motors are basically used. Compared with other types of motors, DC motors have the advantages of small size, high efficiency, simple structure, and less copper consumption. They are the main types of low-power DC motors. In order to further improve the reliability of the DC motor drive, that is, the life of the DC motor needs to be improved. The existing methods for improving the DC mo...

AI Technical Summary

Problems solved by technology

In order to further improve the reliability of the DC motor drive, that is, the life of the DC motor needs to be improved. The existing methods for improving the DC motor generally include adding a varistor to the commutator, increasing the torque of the motor, and adding a capacitor to the end cover. Some DC motors are generally welded with zinc oxide varistors. Increasing the torque without changing the performance of the motor will inevitably increase the current of the motor. However, increasing the current requires higher electricity costs and cannot meet the work requirements. In the case of high torque, the heating of the motor will also increase, and the overheated temperature will affect the normal operation of the motor, resulting in a decrease in torque, which is difficult to meet the production demand, and the method of adding capacitors to the end cover is also the same for this type of motor. difficult to realize

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