Concrete mixer truck is a special truck used to transport concrete for construction; Because of its shape, it is often called snail car. Such trucks are equipped with cylindrical mixing drums to carry the mixed concrete. The concrete mixer truck has five systems:

搅拌筒：该车型所采用的搅拌筒形式是一种应用较为普遍的结构形式，搅拌筒采用梨形结构，其清洗用水和运输过程中视需要补充加入的拌合水，均由搅拌筒头部进料口处注入筒内。

Mixing drum: the mixing drum used in this model is a widely used structural form. The mixing drum adopts pear structure. Its cleaning water and mixing water added as needed during transportation are injected into the drum at the feed inlet at the head of the mixing drum.

传动系统：该搅拌筒的驱动方式为以发动机为动力源，由发动机后端的取力器取力，通过传动轴传递到变量柱塞液压泵，经定量柱塞油马达，再通过减速机带动搅拌筒转动。

Transmission system: the driving mode of the mixing drum is to take the engine as the power source, take the power from the power take-off at the rear end of the engine, transfer it to the variable plunger hydraulic pump through the transmission shaft, drive the mixing drum to rotate through the quantitative plunger oil motor, and then drive the mixing drum through the reducer.

搅拌筒的进出料系统（装料和卸料机构）：是搅拌筒工作的重要装置。

Feeding and discharging system of mixing drum (loading and unloading mechanism): it is an important device for mixing drum.

操纵系统：是整个搅拌车的**部件，操纵面板上开有“工字形”槽，是操纵杆的活动空间；并且后半部的槽上开有限位孔，用来固定操纵杆的位置。该操纵系统通过汽车尾部的左右两个操纵杆来**搅拌筒的正反转和转速，从而来完成进出料以及搅拌动作。

Control system: it is the * * part of the whole mixer. There is an "I-shaped" slot on the control panel, which is the movable space of the control lever; And a limited position hole is opened on the groove of the rear half to fix the position of the control lever. The control system controls the forward, reverse and rotational speed of the mixing drum through the left and right control levers at the rear of the vehicle, so as to complete the feeding, discharging and mixing actions.

供水系统：混凝土搅拌车的供水系统主要用来清洗搅拌装置。该车型的供水系统共有两种型式，一种是离心水泵供水系统；一种是压力水箱供水系统，可供用户选装。

Water supply system: the water supply system of concrete mixer truck is mainly used to clean the mixing device. There are two types of water supply system for this model: one is centrifugal water pump water supply system; One is the water supply system of pressure water tank, which can be optional for users.

混凝土搅拌车在运输过程中会始终保持搅拌筒转动，以保证所运载的混凝土不会凝固。运送完混凝土后, 通常都会用水冲洗搅拌筒内部, 防止硬化的混凝土占用空间, 使搅拌筒的容积越来越少。

The concrete mixer will always keep the mixing drum rotating during transportation to ensure that the transported concrete will not solidify. After transporting the concrete, the interior of the mixing drum is usually washed with water to prevent the hardened concrete from occupying space and reduce the volume of the mixing drum.