Product Introduction

Motor brush holder shell lost wax investment casting

Brush rack are basically products used in the industrial field, most of us have not seen nor heard, you can say that in life is not very common, but they also play an irreplaceable role in the industrial industry, then we must first understand the system composition of the brush rack, then follow us to understand it.

Brush holder refers to the installation of the brush device, which ensures the accurate position of the brush on the commutator, so as to ensure that the brush is fully in close contact with the commutator, so as to keep the contact voltage drop constant, the brush does not jump cause sparks, and the commutation failure occurs. According to its structural form, the common tube type, coil spring type and printed box type. Tubular brush holder is also called brush holder and brush holder assembly. It is a cylinder made of brass that is mounted in a housing. It uses a spring with a brush and is tightened with a brush cap. It is widely used. And easy to install brushes.

Coil spring brush holder adopts insulating board as the base plate, and the brush holder made of brass plate and coil spring are placed on the plate. The brush holder has the advantages of simple structure, low processing requirements and convenient adjustment, but poor rigidity and large deformation, and is not suitable for use in high-speed and high-vibration tools. It is also screwed to the housing. Generally use a brush without a spring, it is not convenient to replace the brush. Cylindrical brush holder is generally fixed and pressed by casing, which is mostly used in electric drill. It is made of arc-resistant plastic and uses a spring-loaded brush. To replace the brush, usually remove the back cover. The cover cannot be lost. Once lost, it can be replaced with a hard plastic sheet. Disassembly method, first record the motor lead is extremely red, negative is extremely black (but there are different color lines), and record the position of the old commutator in order to reassemble. Then remove the brush lead and motor lead according to "Brush and brush spring removal". Then remove the four brush holder fastening bolts. Most people remove brush holders.

The brush holder is installed by placing the new brush holder on the left side of the stator, in the position of the original brush holder (the stator's round bolt hole should be in the middle of the circular hole of the brush holder). Then secure the brush holder with four bolts. Fix the wiring piece of the brush lead and the motor lead on the terminal post of the brush holder (note that the position of the two leads of the motor should be opposite to the original position, otherwise the motor will reverse).

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