Electric driving device and agitating lorry

Abstract

The utility model provides an electric driving device and an agitating lorry. The electric driving device comprises a speed reducer; a motor assembly; the brake part and the motor assembly are both connected with the speed reducer. The brake part is configured to brake the speed reducer when the speed of the motor assembly returns to zero and stops driving the speed reducer. When braking is needed, if an operator temporarily pulls out a key of the mixer truck, the mixer truck is powered off, the motor assembly receives a signal instruction such as a low-voltage signal, the low-voltage signal enables the motor assembly to enter a braking state, the speed of the motor assembly is made to return to zero, and therefore when driving of the speed reducer is stopped, a braking part brakes due to power failure, and the motor assembly stops braking. And the brake part further locks the brake of the speed reducer and cuts off the transmission path of inertia force, so that the rotation of the mixing drum is quickly stopped in a short time instead of being gradually decelerated, thereby avoiding continuous rotation and swinging of the mixing drum caused by inertia of the speed reducer after the motor assembly is stopped, and improving the safety.

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