A technique capable of suppressing fretting wear at a spigot fitting portion (66) between an output member (42) and a wheel member (44) is provided. A wheel drive device (10) that drives a wheel (20) includes an output member (42), and a wheel member (44) ...

An apparatus of the type mounted in mobile connection with a rotating axle of the vehicle (1) is equipped with a force reducer (3), motor springs (5 and 11) housed in housings (6 and 12) fitted with toothed crowns (6bis and 12bis) and mounted on hubs (4 an...

A magnetic force estimating unit (38) for estimating the magnetic force of a permanent magnet of a rotor of a motor (6), a determining unit (39), and a demagnetization responsive timing changing unit (40) are provided in an inverter device (22) or an elect...

A vehicle has a motor-gear unit (100'), a trailing wheel (61) of the vehicle being connected the output shaft (11') of the gear and an input shaft of the gear being connected to a motor. The gear has an outer wheel (2), an inner wheel (6) and a traction me...

For supporting, between a pair of arms 20L and 20R with a wheel axle 21, a wheel 30 provided therein with a motor 40 having a stator 41 and a rotor 42 and equipped with a fixed-side member 60 supporting the stator 41 and a rotative-side member receiving ro...

Even when the effective radii of wheels differ from each other because of a change in tire pneumatic pressure, the difference in driving force between left and right drive wheels are substantially zeroed to suppress a turning force to thereby increase the ...

To provide an electric vehicle in which weight balance is easily achieved and which allows an improvement in the operational efficiency of mounting, removal, and replacement of a wheel and a motor. An electric vehicle (10) includes a double-sided swing arm...

Provided is an electric vehicle that is easy to start to move even when there is load applied, and which does not generate rotational resistance of the electric motor when the vehicle is push-walked. A connection/disconnection mechanism is provided between...