A concrete mixer truck is composed of a truck chassis and a special device for concrete mixing and transportation. The special device mainly includes a power take-off (PTO), front and rear supports of the mixing drum, a reducer, a hydraulic system, the mixing drum, a control mechanism, a cleaning system, etc.
The working principle is that the power take-off device takes the power from the truck chassis and drives the variable pump of the hydraulic system. The mechanical energy is converted into hydraulic energy and transmitted to the fixed displacement motor. The motor drives the reducer, and then the reducer drives the mixing device to mix the concrete.