Patent ID: 7392995

Claim:
A driving device for a wheelbarrow, comprising: a motor assembly having a shaft and a rotor mounted onto the shaft, the rotor having a coil connected thereto, a frame embracing the rotor and magnets, electric brushes, commutators, a motor frame having a threaded section, and a cover; a gear set having a collar which has a toothed inner periphery and a board located within the collar, a plurality of planet gears rotatably connected to the board and engaged with the toothed inner periphery, a driving gear connected to the shaft and engaged with the planet gears; a wheel assembly having a tire connected to a rim and the collar connected to the rim, and a brake mechanism having a connection plate which is connected to a side of the motor frame, an adjustment nut having a threaded inner periphery which is threadedly connected to the threaded section on the motor frame, a brake lining located between the adjustment nut and the connection plate, a fastener mounted to an outer periphery of the adjustment nut, a link connected to the motor frame and connected with an end of a spring, the other end of the spring connected with the fastener which is connected to a brake lever.