Shape grinder is fitted to brush

The utility model discloses a shape grinder is fitted to brush to solve the not technical problem of adaptation of brush that prior art ground out and sliding ring. This shape grinder is fitted to brush includes cambered surface grinding apparatus, arc bracket, at least one brush holder, the brush holder is installed on the arc bracket, and the extrados of cambered surface grinding apparatus is the face of cylinder, and the diameter on the face of cylinder is the same with the surface diameter of the sliding ring of brush adaptation, it has the cambered way to open on the cambered surface grinding apparatus, and the arc bracket has the sliding contact face with the cambered way adaptation, and the sliding contact face falls into in the cambered way, wherein, in the time of in the brush holder is packed into to the brush, the brush is pressed to the cambered surface grinding apparatus under the exogenic action, and the arc bracket carries out the reciprocating sliding for the extrados of cambered surface grinding apparatus, drives the grinding of brush. This scheme can be guaranteed the circular arc contact surface after the brush grinds and fit shape with the sliding ring, and then guarantee the accuracy of brush grinding.