Stator for rotating electrical device and stator retaining ring

摘要

A stator for a rotating electrical device includes a stator retaining ring for the stator in a cylinder form that retains a plurality of cores. The stator retaining ring includes the cylinder portion where the cores are attached, and a plurality of fixing flanges where the stator retaining ring retains the housing with screws. A pair of through-holes representing a group of through-holes arranged near to one another extends through each of the fixing flanges. A separation distance β in the circumferential direction defined between the pair of the through-holes belonging to the same group of the through-holes is smaller relative to a separation distance γ in the circumferential direction defined between adjacent through-holes belonging to different groups of the through-holes.

主权项

1. A stator for a rotating electrical device disposed radially outward and facing a rotor, the rotor rotatably attached to a housing, comprising:
a stator retaining ring provided with fixing flanges extending outward in a radial direction from an end portion in an axial direction of a cylinder portion of the stator retaining ring, the stator retaining ring being fixed to the housing at the fixing flanges by screws; and a plurality of cores, each wound with a coil, arranged in an annular form and attached to an inner peripheral surface of the cylinder portion, wherein groups of through-holes extending through the fixing flanges are arranged in a state where a predetermined separation distance in a circumferential direction is defined between the groups of the through-holes where each of the groups of the through-holes includes a plurality of the through-holes arranged near to one another through which the screws are inserted, and wherein adjacent ones of the through-holes belonging to a same group are separated by a separation distance in the circumferential direction that is smaller than the separation distance in the circumferential direction separating adjacent ones of the through-holes belonging to different groups of the through-holes, wherein a recess is formed on each of the fixing flanges, the recess extending in the radial direction from an outer periphery of each of the fixing flanges between the adjacent through-holes belonging to the same group of the through-holes.