Yoke assembly for stator of starter motor
AssigneeDenso Corporation
InventorTakashi HIRABAYASHI
Life of this patent
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Abstract
A yoke assembly for a stator of a starter motor is disclosed including auxiliary poles and magnet springs, with each of auxiliary poles and each of the magnet springs taking the form of a subassembly. The subassembly, composed of each of the auxiliary poles preliminarily mounted on each of the magnet springs, is fixedly secured to an inner peripheral wall of a yoke. This allows the subassemblies to be easily assembled to the yoke in the same process as that in which a yoke assembly is assembled using the magnet springs in the absence of the auxiliary poles, providing assembling processes in common with an increase in mass production effect.
Claims8
A yoke assembly for a stator of a starter motor, comprising:
- a cylindrical yoke having an inner peripheral wall;
- a plurality of subassemblies including magnet springs and auxiliary poles, with each of the magnet springs and each of the auxiliary poles being assembled to each other in advance after which the subassemblies are fixedly secured to the inner peripheral wall of the yoke at circumferentially and equidistantly spaced positions thereof;
- and
- a plurality of stator elements, each composed of a main pole made of a permanent magnet, which are fixedly secured to the inner peripheral wall of the yoke and each of which is fixedly retained with adjacent magnet springs;
- wherein each of the magnet springs includes a back plate, fixedly secured to the inner peripheral wall of the cylindrical yoke, and side plates radially extending from the back plate toward the center of the cylindrical yoke, with the back plate and the side plates formed in a nearly U-shape in cross section and opening toward the center of the cylindrical yoke, wherein each of the auxiliary poles is supported with one of the side plates and held in contact with the main pole on a side increasing magnetic fluxes.
Dependencies are inferred from the claim text.