The utility model discloses a light electric single-wheel balance car driven by an external motor. The light electric single-wheel balance car comprises an
electric control and seat
cushion unit, a suspension lower movable unit, a motor driving unit, a
shock absorber, a
battery pack unit, a wheel set unit, a pedal and the like. A high-speed motor is used for
speed reduction through a gear and
power transmission through a
constant velocity universal joint, and finally a
belt speed reducer is used for driving a wheel set to rotate, so that modular power
layout is achieved. Due to the fact that the power / weight ratio of the high-rotating-speed motor is larger, the total weight of the vehicle can be effectively reduced. The suspension structure of the triangular double shock absorbers can reduce the number of components. The upper half part of the universal
coupling is fixed in the shell of the driving unit, the
lower half sliding part of the universal
coupling is positioned below the damping
system spring, and the motor is fixedly mounted through the
expansion joint of the universal
coupling, so that the
power unit does not move along with the suspension. Due to the adoption of the modularized structure, the disassembly and maintenance are convenient, and the reassembly and combination are simple and convenient. The last stage adopts belt transmission,
noise is reduced, and maintenance is convenient.