Carbon commutator

Abstract

The invention discloses a carbon commutator and relates to the technical field of commutators. The carbon commutator include an integrally-formed insulating body and a plurality of commutating piecesdisposed on the insulating body. The commutating pieces each include an inner copper layer and an outer carbon layer. The inner copper layer includes an integrally-formed hook and an inner hook member. One end of the inner hook member is connected to the hook, and the other end of the inner hook member extends away from the hook along the axial direction of the insulating body. The outer carbon layer is located on the side of the insulating body. An arc surface of the outer carbon layer facing the axis of the insulating body and an arc surface of the inner hook member away from the axis of theinsulating body are welded to each other. The carbon commutator has the effects of enhancing the commutating piece connection strength, reducing welding resistance, and reducing power loss.

Description

technical field [0001] The present invention relates to the technical field of commutators, more specifically, it relates to a carbon commutator. Background technique [0002] The commutator is a component used for current commutation on DC motors and AC series motors in order to allow the motor to continue to rotate, commonly known as a commutator. [0003] In the prior art, a Chinese patent with the authorized announcement number CN209029649U discloses a corrosion-resistant commutator, including a bakelite matrix and a plurality of commutator segments evenly arranged on the outer circumference of the bakelite matrix , the outer surfaces of a plurality of commutator pieces jointly surround the commutator cylindrical surface in contact with the carbon brush of the motor, and the top of the commutator piece is provided with a welding wire hook, which is characterized in that: the commutator piece is bent with the welding wire The upper part of the hook connection is made of ...

AI Technical Summary

Problems solved by technology

[0005] 1. The joint surface of the upper and lower parts of the commutator is fixed by welding. Since the area of ​​the joint surface of the upper and lower ends is small, the strength after welding is not enough. In the case of high-speed rotation of the commutator, the carbonaceous material and Copper material is easy to separate;

[0006] 2. The welding resistance of the entire commutator segment is relatively large. Due to the small welding area between the upper part and the lower part, the welding resistance is large, and the current loss is greater when passing through the hook, the upper part and the lower part.

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