CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on and claims priority to Japanese Patent Application No. 2017-079203 filed on Apr. 12, 2017, the entire content of which is incorporated herein by reference. This application is based on International Patent Application No. PCT/JP2018/015289 filed on Apr. 11, 2018, the entire content of which is incorporated herein by reference.

FIELD

The present invention relates to an electromobility vehicle.

BACKGROUND

As such an electromobility vehicle, an electric wheelchair is known which uses a wheel having an outer circumferential surface formed by a plurality of rollers arranged in a circumferential direction (for example, see Japanese Unexamined Patent Application, Publication No. H11-227404). In the wheel of the wheelchair, a rubber buffer member is interposed between the rollers in order to reduce vibrations that are generated when the rollers come into contact with the ground one after another in response to the rotation of the wheel.

Also, another electromobility vehicle is known, according to which, each roller has a semi-spindle shape in order to reduce the vibrations that are generated when the rollers come into contact with the ground one after another in response to the rotation of the wheel, and the outer circumferential surface of the wheel formed by the rollers has a shape of a substantially smooth circle (for example, see Japanese Unexamined Patent Application, Publication No. 2002-137602).

Also, a still another electromobility vehicle is known according to which rollers are formed in a semi-spindle shape and, in order to suppress idling of the wheels, a pair of front wheels are mounted to a front-end side of a front-wheel-side floor frame of the vehicle, and a pair of rear wheels are mounted to a rear-end side of a rear-wheel-side floor frame of the vehicle, a rear-end side of the front-wheel-side floor frame and a front-end side of the rear-wheel-side floor frame are coupled to each other such that they can swing in a roll direction; a spring is arranged between the front-wheel-side floor frame and the rear-wheel-side floor frame; and the front-wheel-side floor frame is biased by means of the spring relative to the rear-wheel-side floor frame toward a central position in the roll direction (for example, see Japanese Unexamined Patent Application, Publication No. 2005-047312).

SUMMARY OF INVENTION

An electromobility vehicle on which one person is to be seated to ride according to a first aspect of the present invention includes a vehicle frame; a seat mounted on the vehicle frame; a suspension attached to a front-end side of the vehicle frame; a pair of front wheels arranged in a vehicle width direction and supported by the suspension; at least one rear wheel supported by the vehicle frame; and a drive device that drives either of the front wheels and the rear wheel, in which the front wheel is an omnidirectional wheel whose outer circumferential surface is formed by a plurality of rollers and the front wheels are supported by the suspension such that the front wheels are placed in toe-in arrangement.

An electromobility vehicle of a second aspect of the present invention includes a vehicle frame; a seat mounted on the vehicle frame; a suspension attached to the vehicle frame; a pair of wheels arranged in a vehicle-width direction and supported by the suspension; and a drive device that drives either of a non-omnidirectional wheel supported by the support frame and the wheels, wherein the wheel is an omnidirectional wheel whose outer circumferential surface is formed by a plurality of rollers; and the wheel is supported by the suspension such that the wheels are placed in a toe-in arrangement or a toe-out arrangement.

