Brush box of brush motor and torsion spring anti-falling structure

Abstract

The invention discloses a brush box of a brush motor and a torsion spring anti-falling structure. One side of the brush box is provided with an open groove, another side of the brush box is provided with a closed groove, and the closed groove is used for a hook foot of a torsion spring to penetrate through and abut against a carbon brush. The torsion spring anti-falling structure comprises a middle plate, the carbon brush, the brush box and a torsion spring, a positioning column is arranged on the middle plate, the brush box is installed on the middle plate, the carbon brush is located in thebrush box, a groove is formed in the tail of the carbon brush, the open groove is formed in one side of the brush box, the closed groove is formed in the other side of the brush box, the positioning column is sleeved with the torsion spring, and the hook foot of the torsion spring penetrates the closed groove. The open groove in one side of the brush box is changed into the closed groove, so thatthe torsion spring is limited by the brush box, the torsion spring cannot be separated from the closed groove under falling impact after the motor is assembled, and the normal operation of the motor is guaranteed.

Description

technical field [0001] The invention relates to the technical field of brushed motors, in particular to a brush box and a torsion spring anti-off structure of a brushed motor. Background technique [0002] In existing brushed motors, when torsion springs are used as parts to push the carbon brushes, a notch needs to be opened on the side of the middle plate and the brush box to provide space for the loading and movement of the torsion spring arms. The installation method of the middle plate assembly is as follows: 1. Press the brush box into the middle plate. 2. Insert the carbon brush. 3. Install the torsion spring, put the torsion spring arm through the notch, and press on the carbon brush to provide thrust for the carbon brush to move. 4. After the middle plate assembly is installed, it is combined with the stator, rotor, and rear cover assembly, and the motor assembly is completed. [0003] When the finished motor is dropped from a high place, the carbon brushes of th...

AI Technical Summary

Problems solved by technology

With this design of the motor, since one side of the middle plate and the brush box is a completely open notch structure, it will cause the torsion spring arm to completely fall out of the notch groove of the middle plate and the brush box and detach from the carbon brush.

The motor will not run as there is no torsion spring arm to continue to push the carbon brushes

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