Commutator
AssigneeIgarashi Electric Works Ltd.
InventorShigetaka Oki
Life of this patent
Estimating the term…
Abstract
A commutator comprises a plurality of commutator segments on the outer circumferential surface and is connected at one end to an armature. At the other end, the commutator has an annular noise-preventing electric element, such as varistor, which has a plurality of connecting electrodes, each of which is electrically connected to each of the commutator segments via a short-circuit conductor, thereby avoiding soldering connection.
Claims12
A commutator for an electric motor, the commutator having a first axial end which is connected to an armature and a second axial end opposite the first end, comprising:
- a shaft;
- an insulating tube around the shaft;
- a plurality of commutator segments which axially extend on an outer circumferential surface of the insulating tube;
- an annular noise-preventing electric element at the second axial end of the commutator, having a plurality of connecting electrodes on an axial end face;
- a plurality of short-circuit conductors, each of the conductors electrically connecting each of the commutator segments to each of the connecting electrodes of the annular noise-preventing electric element;
- and
- wherein the short-circuit conductor has a bent portion at one end which is engaged on an inner circumferential surface of the commutator segment.
A commutator for an electric motor, the commutator having a first axial end which is connected to an armature and a second axial end opposite the first end, comprising:
- a shaft;
- an insulating tube around the shaft;
- a plurality of commutator segments which axially extend on an outer circumferential surface of the insulating tube;
- an annular noise-preventing electric element at the second axial end of the commutator, having a plurality of connecting electrodes on an axial end face;
- and
- a plurality of short-circuit conductors, each of the conductors electrically connecting each of the commutator segments to each of the connecting electrodes of the annular noise-preventing electric element wherein the commutator segment and the insulating tube are cut away at the second axial end to form an annular groove in which the noise-preventing electric element and the short-circuit conductor are inserted.
A commutator for an electric motor, the commutator having a first axial end which is connected to an armature and a second axial end opposite the first end, comprising:
- a shaft;
- an insulating tube around the shaft;
- a plurality of commutator segments which axially extend on an outer circumferential surface of the insulating tube;
- an annular noise-preventing electric element at the second axial end of the commutator, having a plurality of connecting electrodes on an axial end face;
- and
- a plurality of short-circuit conductors, each of the conductors electrically connecting each of the commutator segments to each of the connecting electrodes of the annular noise-preventing electric element wherein one end of the short-circuit conductor is engaged on an inner circumferential surface of the commutator segment, the other end being connected to the connecting electrode.
A commutator for an electric motor, the commutator having a first axial end which is connected to an armature and a second axial end opposite the first end, comprising:
- a shaft;
- an insulating tube around the shaft;
- a plurality of commutator segments which axially extend on an outer circumferential surface of the insulating tube;
- an annular noise-preventing electric element at the second axial end of the commutator, having a plurality of connecting electrodes on an axial end face;
- and
- a plurality of short-circuit conductors, each of the conductors electrically connecting each of the commutator segments to each of the connecting electrodes of the annular noise-preventing electric element
- wherein the annular noise-preventing electric element is supported by a push nut
- wherein the short-circuit conductor is engaged on a face of the second axial end, the short-circuit conductor being engaged on the connecting electrode of the noise-preventing electric element.
Dependencies are inferred from the claim text.