Patent ID: 9166453
Filing Date: 2015-10-20
Classification: H02K

Abstract:
1. A stator of a rotary electrical machine, comprising: a core unit configured by a plurality of core assemblies arranged in an annular shape, each of the core assemblies including a laminated steel plate, an insulator insulating a portion of the laminated steel plate, and a coil wound around the insulator; a bus ring formed in an annular shape to face the core unit, the bus ring supplying an electric power to the coil; and an accommodating box arranged at the insulator, accommodating an end portion of the coil, and including a radially inward engaged portion and a radially outward engaged portion, the stator generating a rotating magnetic field when the electric power is applied to the coil, the insulator including radially inward and outward extending portions positioned at radially inward and outward sides of the core unit relative to the coil in an extending manner to support the accommodating box, the radially inward extending portion including a radially inward engagement portion which serves as a rotation center about which the accommodating box rotates in a radial direction of the core unit from an initial attachment position to an attached position, and which engages with the radially inward engaged portion so that the accommodating box is movable relative to the insulator in the radial direction of the core unit in a state where the accommodating box is in the attached position, the radially outward extending portion including a radially outward engagement portion which engages with the radially outward engaged portion in accordance with the rotation of the accommodating box; wherein an inclined surface is formed at one of the radially outward engaged portion of the accommodating box and the radially outward engagement portion of the radially outward extending portion, the inclined surface being inclined toward the radially inward side as being away from the coil, and an engagement surface is formed at the other of the radially outward engaged portion of the accommodating box and the radially outward engagement portion of the radially outward extending portion, the engagement surface slidably contacting the inclined surface in accordance with the rotation of the accommodating box to the attached position to be engaged with the inclined surface.