A carbon brush structure

Abstract

The utility model provides a kind of carbon brush structure, it is related to motor element technical field, the carbon brush structure includes brush grip, wire slot, convex slot, ear foot, carbon brush, further include constant force spring, constant force spring has two mutually connected crimped ends, the two crimped ends of constant force spring are located in the inside of two ear feet, carbon brush has head and tail, the head of carbon brush is contacted with commutator, the tail of carbon brush is located between the two crimped ends of constant force spring and is contacted with constant force spring, the height of convex slot is greater than the width of constant force spring, the lower surface of carbon brush is connected with wire, wire passes through the wire slot of brush grip, the output pressure of constant force spring is constant, can effectively guarantee the contact state of carbon brush and commutator always remains in optimum state, reduce the fluctuation that above-mentioned wire spring causes mechanical wear and tear and electrical wear and tear due to elastic force change, optimize assembly space, the space occupied by constant force spring is small, need not consider wire spring expansion space, further increase carbon brush distribution space.

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