Commutator

摘要

A commutator includes a first body and a second body which are separately made of electrically insulating material, a plurality of commutator segments fixed on an outer surface of the first body and a plurality of commutator terminals. The first body is a hollow cylinder with two opposite ends. Each terminal has a contact area for contacting a corresponding one of the commutator segments. The second body has a base and a ring wall extending from the base, and one end of the first body is received in a space defined by the base and the ring wall, with the contact area of each terminal being in tight contact with the corresponding commutator segment at the inner side of the ring wall.

主权项

1. A commutator, comprising:
a first body and a second body which are separately made of electrically insulating material, the first body being a hollow cylinder with first and second axial ends; a plurality of commutator segments disposed on an outer surface of the first body, each commutator segment having a commutator surface for making slide contact with brushes of a brush motor, the commutator surface being exposed to air and axially extending a majority of the distance between the first and second axial ends of the first body; and a plurality of commutator terminals, each commutator terminal having a contact area for contacting a corresponding one of the commutator segments; wherein the second body has a base and a ring wall extending from the base, and the first end of the first body is received in a space defined by the base and the ring wall, with the contact area of each commutator terminal being in tight contact with the corresponding commutator segment at the radially inner side of the ring wall, the ring wall being parallel to the commutator surface.