초록 ▼

The lawn and garden tractor has independent electric motors for both driven wheels. The motors are combined with reduction gearboxes, and the wheel is mounted on the output shaft of the gearbox. There is no mechanical axle connection. The power to the motors is controlled by an automatic controller

The lawn and garden tractor has independent electric motors for both driven wheels. The motors are combined with reduction gearboxes, and the wheel is mounted on the output shaft of the gearbox. There is no mechanical axle connection. The power to the motors is controlled by an automatic controller as to wheel speed, power being increased/decreased in accordance with whether the wheels are under-running or over-running relative to manually-controlled speed setting. Steering is controlled by potentiometer on a mechanical steering wheel, or by joy-stick control. The joystick may be on the tractor, or remote. The drive system is suitable also for four-wheel drive.

대표청구항 ▼

[ What is claimed is:] [7.] Motor-driven vehicle, having left and right co-axial drive-wheels, wherein:the vehicle includes a left drive-motor, housed in a left motor-housing, for driving the left drive-wheel;the vehicle includes a right drive-motor, housed in a right motor-housing, for driving the

[ What is claimed is:] [7.] Motor-driven vehicle, having left and right co-axial drive-wheels, wherein:the vehicle includes a left drive-motor, housed in a left motor-housing, for driving the left drive-wheel;the vehicle includes a right drive-motor, housed in a right motor-housing, for driving the right drive-wheel;the vehicle includes a left gearbox in a left gearbox-housing, having a left gearbox-output-shaft;the vehicle includes a right gearbox in a right gearbox-housing, having a right gearbox-output-shaft;the left gearbox-output-shaft is mounted for rotation in bearings carried in the left gearbox-housing;the right gearbox-output-shaft is mounted for rotation in bearings carried in the right gearbox-housing;the left gearbox includes a left gear-train, which connects the left drive-motor to the left gearbox-output-shaft;the right gearbox includes a right gear-train, which connects the right drive-motor to the right gearbox-output-shaft;the left motor-housing and the left gearbox-housing are integrated into a common, structurally-unitary, left housing;the right motor-housing and the right gearbox-housing are integrated into a common, structurally-unitary, right housing;the arrangement of the left housing and the right housing in the vehicle is such that the left gearbox-output-shaft and the right gearbox-output-shaft are in coaxial alignment;the left driven-wheel is mounted directly upon, and is so mounted as to be structurally-unitary with, the left gearbox-output-shaft;the right driven-wheel is mounted directly upon, and is so mounted as to be structurally-unitary with, the right gearbox-output-shaft.