In-wheel motor and electrically driven vehicle

摘要

The in-wheel motor for installation inside a wheel disk of a wheel includes: a cylindrical coil body; a coil body support member fixed to a shaft; an outer yoke that is disposed on an outer circumferential side of the coil body, and is fixed to a wheel disk; a cylindrical inner yoke that is disposed on an inner circumferential side of the coil body, and is rotatable around the shaft; and a magnet that is fixed on one of an inner circumferential face of the outer yoke and an outer circumferential face of the inner yoke, the magnet disposed to face a circumferential face of the coil body.

主权项

1. An in-wheel motor installed inside a wheel disk of a wheel to rotationally drive the wheel around a shaft of the wheel by way of applying a current thereto, the in-wheel motor comprising:
a coreless cylindrical coil body to which a lead wire for applying a current is connected, the shaft being inserted in an inner circumferential side of the coil body, the coil body supported at an inner car body end by a disk-shaped coil body support member that is fixed to the shaft; a cylindrical outer yoke that is disposed on an outer circumferential side of the coil body, and an outer wheel-disk end thereof is fixed to the wheel disk, an inner car body end of the outer yoke further being fixed to a cover disk that covers an inner car body side of the in-wheel motor and is journalled for rotation about the shaft; a cylindrical inner yoke that is disposed on an inner circumferential side of the coil body and has an outer wheel-disk end thereof attached to the outer wheel-disk end of the outer yoke, an inner car body end of the inner yoke further being fixed to a support disk rotatable around the shaft, wherein the outer yoke, the inner yoke, the support disk and the cover disk together rotate as a rotor around the coil body and provide a hermetic seal around the coil body so as to prevent water and foreign matter from reaching the coil body; a magnet that is fixed to rotate with the rotor immediately adjacent a circumferential face of the coil body; a brake disk that is fixed to an inner circumferential side of the inner yoke; and a caliper that is provided on the inner circumferential side of the inner yoke to brake the brake disk.