Concrete mixer is a kind of special truck used to transport concrete construction. Because of its shape, it is usually called a snail. The truck is equipped with a cylindrical mixer to transport the mixed concrete. The concrete mixer has five systems:

1. 混合筒:本模型采用的混合筒類型是一種應用廣泛的結構形式。攪拌筒采用梨形結構。

1. Mixing cylinder: the type of mixing cylinder used in this model is a widely used structural form. The mixing drum adopts pear structure.

2. 傳動系統:攪拌滾筒的驅動方式以發動機為動力源,將力從電源器尾部的引擎,將其傳輸到變量柱塞液壓泵傳動軸,通過定量柱塞油馬達,然后通過減速器驅動攪拌滾筒旋轉。

2. Transmission system: the driving mode of the mixing drum takes the engine as the power source, which transfers the force from the engine at the end of the power supply to the transmission shaft of the variable plunger hydraulic pump, through the quantitative plunger oil motor, and then drives the mixing drum to rotate through the reducer.

3.混合鼓的充放電系統(充放電機構):是輔助混合鼓工作的重要設備。

3. Charge and discharge system of mixing drum (charge and discharge mechanism): it is an important equipment to assist the mixing drum.

4. 控制系統:是整個混合器的控制部分?？刂泼姘迳嫌幸粋€“i”型槽，是操縱桿的活動空間。后半部分的插槽有一個有限的位孔，用來固定操縱桿的位置。控制系統通過車尾左右桿控制攪拌缸的正、反、轉速，完成進料、出料和攪拌動作。

4. Control system: it is the control part of the whole mixer. There is an "I" groove on the control panel, which is the active space of the joystick. The slot in the back half has a limited position hole to hold the lever in place. The control system controls the forward, reverse and rotation speed of the mixing cylinder through the left and right rods at the rear of the vehicle to complete the feeding, discharging and mixing actions.

5. 供水系統:全自動自上料攪拌車供水系統主要用于清洗攪拌裝置。該模型有兩種供水系統，一種是離心式供水系統;一種是壓力罐供水系統，可選安裝。

5. Water supply system: the water supply system of concrete mixer is mainly used for cleaning the mixing device. The model has two kinds of water supply systems, one is centrifugal water supply system, the other is pressure tank water supply system, which can be installed optionally.

自上料混凝土攪拌罐車在運輸過程中始終保持攪拌筒轉動，以保證混凝土不凝固。混凝土交付后，攪拌桶的內部通常用水沖洗，以防止硬化混凝土占用空間，并減少攪拌桶的體積。

The concrete mixer always keeps the mixing drum rotating during transportation to ensure that the concrete does not set. After the concrete is delivered, the inside of the drum is usually washed with water to prevent the hardened concrete from taking up space and to reduce the volume of the drum.