Trucks used to transport concrete for construction; Because of its shape, it is often called snail car and olive car. Such trucks are equipped with cylindrical mixing drums to carry the mixed concrete. During transportation, the mixing drum will always be kept rotating so that the transported concrete will not solidify. After the concrete is transported, the interior of the mixing drum is usually washed with water to prevent the residual concrete from hardening and occupying space, so as to reduce the volume of the mixing drum.

混凝土搅拌运输车由汽车底盘和混凝土搅拌运输装置组成。我国生产的混凝土搅拌运输车的底盘多采用整车生产厂家提供的二类通用底盘。其机构主要包括取力器、搅拌筒前后支架、减速机、液压系统、搅拌筒、机构、清洗系统等。工作原理是，通过取力装置将汽车底盘的动力取出，并驱动液压系统的变量泵，把机械能转化为液压能传给定量马达，马达再驱动减速机，由减速机驱动搅拌装置，对混凝土进行搅拌。

The concrete mixer truck is composed of an automobile chassis and a concrete mixing and transportation device. The chassis of concrete mixer trucks produced in China mostly adopts class II general chassis provided by vehicle manufacturers. The mechanism mainly includes power takeoff, front and rear supports of mixing drum, reducer, hydraulic system, mixing drum, mechanism, cleaning system, etc. The working principle is that the power of the automobile chassis is taken out through the power take-off device, and the variable pump of the hydraulic system is driven to convert the mechanical energy into hydraulic energy and transmit it to the quantitative motor. The motor then drives the reducer, and the reducer drives the mixing device to mix the concrete.

采用主车发动机取力方式。取力装置的作用是通过取力开关将发动机动力取出，经液压系统驱动搅拌筒，搅拌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 power take-off mode of main vehicle engine is adopted. The function of the power take-off device is to take out the power of the engine through the power take-off switch and drive the mixing drum through the hydraulic system. The mixing drum rotates forward during feeding and transportation, so as to facilitate feeding and mixing of concrete, rotate reversely during discharging, and cut off the power connection with the engine after the end of work.

搅拌装置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，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。

The mixing device is mainly composed of mixing drum and its auxiliary supporting parts. The mixing drum is the loading container of concrete. 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 blade. When discharging, the mixing drum reverses, and the concrete is discharged outward along the blade.

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，自动上料搅拌车4立方搅拌车

Blade is the main component of 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, and the automatic feeding mixer will be 4 cubic mixer

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