Patent ID: 9209664
Filing Date: 2015-12-08
Classification: F16H,H02K

Abstract:
1. A vehicle rotating electrical machine, comprising: a pulley unit that is mechanically connected to a rotation shaft of the vehicle rotating electrical machine, the pulley unit including a pulley shaft and a pulley, the pulley shaft mounting and fixing the rotation shaft, the pulley being located around an outer peripheral surface of the pulley shaft; and a cap that covers an opening portion which opens on an axial end surface of the pulley unit, wherein the pulley shaft has an inner peripheral surface on which a polygonally-shaped hole portion, a first circular hole portion, a second circular hole portion, and an inner diameter thread portion are formed, the cap is made of resin material and is attached to the pulley shaft, the cap including: each of the plurality of pillar sections further includes a planar surface portion and a step portion, the planar surface portion being an outer surface of the respective pillar section that faces an inner surface of the polygonally-shaped hole portion, the step portion being formed between the planar surface portion and the bulge portion, and the step portion includes a gap in the radial direction that is formed between the step portion and the first circular hole portion, the gap extending in the axial direction over the step portion.