Commutator for motor-tricycle

The utility model discloses a reverser used for small power motor tricycles under the 250 type, which is composed of a box body, a shaft arranged in the box body, a double face jaw clutch arranged on the shaft, two end face jaw clutch bevel gears, a chain wheel, a triangular belt wheel, a small bevel gear and other auxiliary driving components. The driving rigidity can be raised, the driving torque can be increased, the self-weight of a motor tricycle is increased. Under the condition that the loading capacity is increased by one time, the running speed of the motor tricycle isn't changed, and the motor tricycle can run forwards and backwards freely. IF a hanging accessory is added, the utility model can also be used for the emergent power generation in fields or families, farmland pumping irrigation, etc.