초록 ▼

A four-wheeled-electromotive cart includes a single motor and a direct axle driving mechanism for driving the axle of left and right front wheels by means of the motor. The single electric motor would cause no rotation speed difference between the left and right front wheels and hence constantly per

A four-wheeled-electromotive cart includes a single motor and a direct axle driving mechanism for driving the axle of left and right front wheels by means of the motor. The single electric motor would cause no rotation speed difference between the left and right front wheels and hence constantly permits a smooth linear movement of the electromotive cart. The direct axle driving mechanism includes a relay shaft connected to the output shaft of the electric motor, a small-diameter bevel gear mounted on a lower end of the relay shaft, and a large-diameter bevel gear engaging with the small-diameter bevel gear. The front-wheel axle is spline-connected to the large-diameter bevel gear so as to be driven by the motor via the direct axle driving mechanism. Thus, the electromotive cart is allowed to smoothly start moving without sudden jolts or shocks caused by start of the motor rotation.

대표청구항 ▼

[ What is claimed is:] [1.] A four-wheeled electromotive cart comprising:a body framework;a front-wheel axle rotatably supported by a front portion of said body framework;a pair of left and right front wheels fixed on said front-wheel axle;a pair of left and right rear wheels supported by a rear por

[ What is claimed is:] [1.] A four-wheeled electromotive cart comprising:a body framework;a front-wheel axle rotatably supported by a front portion of said body framework;a pair of left and right front wheels fixed on said front-wheel axle;a pair of left and right rear wheels supported by a rear portion of said body framework;a load carrier base supported by an upper portion of said load carrier base obliquely upward in a rearward direction of said electromotive cart;a pair of batteries disposed below said load carrier base between said front wheels and said rear wheels in such a manner that said batteries are located along both sides of said body framework;a single electric motor driven by said batteries; anda driven mechanism, directly coupling said electric motor and said front-wheel axle, for directly conveying driving force from said electric motor to said left and right front wheels via the front-wheel axle, said driving mechanism including a relay shaft connected to an output shaft of said electric motor, a small-diameter bevel gear mounted on a lower end of said relay shaft, and a large-diameter bevel gear engaging with said small-diameter bevel gear, and wherein said driving mechanism drives said front-wheel axle that is spline-connected to said large-diameter bevel gear;wherein said left and right rear wheels are each smaller in diameter than said left and right front wheels, a distance between outer side surfaces of said left and right front wheels is greater than a distance between outer side surfaces of said left and right rear wheels, and said left and right batteries are positioned so as not to project laterally beyond the outer side surfaces of said left and right front wheels; andwherein said electric motor is disposed in the vicinity of said front-wheel axle and located outside a space between said pair of left and right front wheels and said pair of left and right rear wheels at a higher position than said front-wheel axle, said electric motor having an axis extending perpendicular to an axis of said front-wheel axle.