1.1 power take-off device

国产混凝土搅拌运输车采用主车发动机取力方式。取力装置的作用是通过操纵取力开关将发动机动力取出，经液压系统驱动搅拌筒，搅抖筒在进料和运输过程中正向旋转，以利于进料和对混凝土进行搅拌，在出料时反向旋转，在工作终结后切断与发动机的动力联接。

The domestic concrete mixer truck adopts the main truck engine power taking 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, drive the mixing drum through the hydraulic system, and the mixing drum rotates in the forward direction during the feeding and transportation process, so as to facilitate the feeding and mixing of the concrete, rotate in the reverse direction during the discharging, and cut off the power connection with the engine after the end of the work.

1．2液压系统

1.2 hydraulic system

将经取力器取出的发动机动力，转化为液压能(排量和压力)，再经马达输出为机械能(转速和扭矩)，为搅拌筒转动提供动力。

The engine power taken out by the power take-off is converted into hydraulic energy (displacement and pressure), and then output to mechanical energy (speed and torque) by the motor, providing power for the rotation of the mixing drum.

1．3减速机

1.3 reducer

将液压系统中马达输出的转速减速后，传给搅拌筒。

Reduce the speed of the motor output in the hydraulic system, and then transfer it to the mixing drum.

1．4操纵机构

1.4 operating mechanism

a．控制搅拌筒旋转方向，使之在进料和运输过程中正向旋转，出料时反向旋转。

a. Control the rotation direction of the mixing drum to make it rotate in the forward direction in the process of feeding and transportation, and rotate in the reverse direction in the process of discharging.

b．控制搅拌筒的转速

b. Control the rotating speed of mixing drum

1．5搅拌装置

1.5 mixing device

它主要由搅拌筒及其辅助支撑部件组成。搅拌筒是混凝土的装载容器，它是由优质耐磨薄钢板制成，为了能够自动装、卸混凝土，其内壁焊有特殊形状的螺旋叶片。转动时混凝土沿叶片的螺旋方向运动，在不断的提升和翻动过程中受到混合和搅拌。在进料及运输过程中，搅拌筒正转，混凝土沿叶片向里运动，出料时，搅拌筒反转，混凝土沿着叶片向外卸出。搅拌筒的转动则是靠液压驱动装置来保证。装载量为3～6立方的混凝土搅拌运输车一般采用由汽车发动机通过动力输出轴带动液压泵，再由高压油推动液压马达驱动搅拌筒，装载量为9～12立方的则由车载辅助柴油机带动液压泵驱动液压马达。叶片是搅拌装置中的主要部件，损坏或严重磨损会导致混凝土搅拌不均匀。另外，叶片的角度如果设计不合理，还会使混凝土出现离析。

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 steel sheet. In order to automatically load and unload concrete, its inner wall is welded with special shape spiral blades. 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. In the process of feeding and transportation, the mixing drum rotates positively, the concrete moves inward along the blade, and when discharging, the mixing drum reverses, and the concrete is discharged outward along the blade. The rotation of the mixing drum is guaranteed by the hydraulic drive device. The concrete mixer truck with a loading capacity of 3-6 cubic meters generally uses a hydraulic pump driven by an automobile engine through a power output shaft, and then a hydraulic motor driven by a high-pressure oil to drive the mixing drum. The truck mounted auxiliary diesel engine drives the hydraulic pump to drive the hydraulic Marta with a loading capacity of 9-12 cubic meters. The blade is the main part of the mixing device, which will lead to uneven mixing of concrete if it is damaged or severely worn. In addition, if the blade angle is not designed properly, the concrete will be separated.

1．6清洗系统

1.6 cleaning system

清洗系统的主要作用是清洗搅拌筒，有时也用于运输途中进行干料搅拌。清洗系统还对液压系统起冷却作用。

The main function of the cleaning system is to clean the mixing drum, and sometimes it is also used for dry material mixing during transportation. The cleaning system also cools the hydraulic system.

2 混凝土搅拌运输车的维护和修理

2 maintenance and repair of concrete mixer truck

混凝土搅拌运输车作为运输用汽车，在维护和修理方面必须遵照交通部1990年13号令的规定，执行“定期检测、强制维护、视情修理”的维护和修理制度。在这个大前提下，再结合混凝土搅拌运输车的实际情况，做好维护和修理。在日常维护方面，混凝土搅拌运输车除应按常规对汽车发动机、底盘等部位进行维护外，还必须做好以下维护工作。

As a transport vehicle, the maintenance and repair system of "regular inspection, compulsory maintenance and repair as the case may be" must be carried out in accordance with the provisions of order No. 13 of the Ministry of communications in 1990. Under this premise, combined with the actual situation of the concrete mixer truck, the maintenance and repair should be done well. In the aspect of daily maintenance, the concrete mixer truck should not only maintain the engine, chassis and other parts of the car according to the routine, but also do the following maintenance work.

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