Power take-off device
The self feeding cement mixer adopts the power taking mode of main vehicle engine. The function of the power take-off device is to take out the power of the engine by operating the power take-off switch, drive the mixing drum through the hydraulic system, and the mixing drum rotates in a positive direction during feeding and transportation, so as to facilitate feeding and mixing of concrete, rotate in a reverse direction during discharging, and cut off the power connection with the engine after the work is completed.
The engine power taken out by the power take-off (generally rear full-function power take-off) is converted into hydraulic energy (displacement and pressure), and then output into mechanical energy (speed and torque) by the motor to provide power for the rotation of the mixing drum.
The speed output by the motor in the hydraulic system is reduced and transmitted to the mixing drum.
Control the rotation direction of the mixing drum to make it rotate forward during feeding and transportation and reverse during discharging. Control the rotating speed of the mixing drum.
It is mainly composed of mixing drum and its auxiliary supporting parts. The mixing drum is a container for loading concrete. It is made of high-quality wear-resistant steel plate. In order to automatically load and unload concrete, its inner wall is welded with spiral blades of special shape. When rotating, the concrete moves along the spiral direction of the blade, and is mixed and stirred in the process of continuous lifting and turning. During feeding and transportation, the mixing drum rotates forward, and the concrete moves inward along the blades. During discharging, the mixing drum reverses, and the concrete is discharged outward along the blades.
The rotation of the mixing drum is ensured by the hydraulic driving device. The automatic loading mixer with a loading capacity of 3 ~ 6 cubic meters generally adopts the hydraulic pump driven by the automobile engine through the power output shaft, and then the hydraulic motor driven by the high-pressure oil to drive the mixing drum. For the mixer with a loading capacity of 9 ~ 12 cubic meters, the hydraulic pump driven by the on-board auxiliary diesel engine drives the hydraulic motor. The blade is the main component in the mixing device. Damage or serious wear will lead to uneven mixing of concrete. In addition, if the design of blade angle is unreasonable, the concrete will be separated.
The fully enclosed device of the self feeding cement mixer adopts the rotary sealing technology, which seals the inlet and outlet of the mixer, and solves a series of problems such as water evaporation, mortar layering, concrete scattering and driving safety of the traditional mixer.
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