1. Power take-off device
The automatic loading mixer adopts the main vehicle engine power take-off mode. The function of the power take-off device is to take out the power of the engine by operating the power take-off switch, and drive the mixing drum through the hydraulic system. The stirring drum rotates forward in the process of feeding and transportation to facilitate the feeding and mixing of concrete. It rotates reversely when discharging, and cuts off the power connection with the engine after the end of the work.
2. Hydraulic system
The power of the engine taken out by the power take-off device (generally full-function power take-off device at the rear) is converted into hydraulic energy (displacement and pressure), and then output to mechanical energy (speed and torque) through the motor to provide power for the rotation of the mixing drum.
After decelerating the speed of the motor output in the hydraulic system, it is transmitted to the mixing drum.
4. Control mechanism
a. Control the rotation direction of the mixing drum to make it rotate forward in the process of feeding and transportation, and reverse rotation when discharging.
b. Control the speed of mixing drum.
5. Mixing device
It is mainly composed of mixing drum and its auxiliary supporting parts. The mixing drum is a concrete loading container, which is made of high-quality wear-resistant thin 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 mixed in the process of continuous lifting and turning. In the process of feeding and transportation, the mixing drum rotates forward, and the concrete moves inward along the blade. When discharging, the mixing drum reverses and the concrete is discharged outward along the blade. The rotation of the mixing drum is ensured by the hydraulic driving device. The loading capacity is 3-6 cubic meters. In general, the truck engine drives the hydraulic pump through the power output shaft, and then the high-pressure oil drives the hydraulic motor to drive the mixing drum. For the truck with a loading capacity of 9-12 cubic meters, the auxiliary diesel engine on board drives the hydraulic pump to drive the hydraulic motor. Blade is the main part of the mixing device, damage or serious wear will lead to uneven mixing of concrete. In addition, if the angle of blade is not reasonable, it will cause concrete segregation.
6. Cleaning system
The main function of the cleaning system is to clean the mixing drum, and sometimes it is used for dry material mixing during transportation. The cleaning system also cools the hydraulic system.
7. Closure device
The rotary sealing technology is adopted in the fully closed device to seal the inlet and outlet of the mixer, and a series of problems such as water evaporation, mortar layering, concrete spreading and driving safety of the traditional mixer truck are solved.
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