The concrete mixer truck is composed of an automobile chassis and a special device for concrete mixing and transportation. The chassis of concrete mixer trucks produced in China mostly adopts class II general chassis provided by vehicle manufacturers. Its special mechanism mainly includes power takeoff, front and rear supports of mixing drum, reducer, hydraulic system, mixing drum, operating 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.

結構原理

Structural principle

取力裝置

Power take-off device

國產混凝土攪拌運輸車采用主車發動機取力方式。取力裝置的作用是通過操縱取力開關將發動機動力取出，經液壓系統驅動攪拌筒，攪拌筒在進料和運輸過程中正向旋轉，以利于進料和對混凝土進行攪拌，在出料時反向旋轉，在工作終結后切斷與發動機的動力聯接。

The domestic concrete mixer truck adopts the power take-off mode of main vehicle engine. 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 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 work.

液壓系統

Hydraulic system

將經取力器取出的發動機動力，轉化為液壓能（排量和壓力），再經馬達輸出為機械能（轉速和扭矩），為攪拌筒轉動提供動力。

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

減速機

Reducer

將液壓系統中馬達輸出的轉速減速后，傳給攪拌筒。

The speed output by the motor in the hydraulic system is decelerated and transmitted to the mixing drum.

操縱機構

Operating mechanism

（1）控制攪拌筒旋轉方向，使之在進料和運輸過程中正向旋轉，出料時反向旋轉。

(1) Control the rotation direction of the mixing drum to make it rotate forward during feeding and transportation and reverse during discharging.

（2）控制攪拌筒的轉速。

(2) Control the rotating speed of the mixing drum.

攪拌裝置

Mixing device

攪拌裝置主要由攪拌筒及其輔助支撐部件組成。攪拌筒是混凝土的裝載容器，轉動時混凝土沿葉片的螺旋方向運動，在不斷的提升和翻動過程中受到混合和攪拌。在進料及運輸過程中，攪拌筒正轉，混凝土沿葉片向里運動，出料時，攪拌筒反轉，混凝土沿著葉片向外卸出。

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.

葉片是攪拌裝置中的主要部件，損壞或嚴重磨損會導致混凝土攪拌不均勻。另外，葉片的角度如果設計不合理，還會使混凝土出現離析。

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.

清洗系統

Cleaning system

清洗系統的主要作用是清洗攪拌筒，有時也用于運輸途中進行干料拌筒。清洗系統還對液壓系統起冷卻作用。

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

全封閉裝置

Totally enclosed device

全封閉裝置采用回轉密封技術，密封了攪拌車的進出料口，解決了傳統攪拌車水份蒸發、砂漿分層、砼料撒落、行車安全等系列問題。

The fully enclosed device adopts rotary sealing technology to seal the inlet and outlet of the mixer truck, and solves a series of problems such as water evaporation, mortar stratification, concrete scattering and driving safety of the traditional mixer truck.

維修保養

Maintenance

混凝土攪拌運輸車作為運輸用汽車，在維護和修理方面必須遵照交通部1990年13號令的規定，執行“定期檢測、強制維護、視情修理”的維護和修理制度。在這個大前提下，再結合混凝土攪拌運輸車的實際情況，做好維護和修理。在日常維護方面，混凝土攪拌運輸車除應按常規對汽車發動機、底盤等部位進行維護外，還必須做好以下維護工作。

As a transport vehicle, the maintenance and repair of concrete mixer truck must comply with the provisions of order No. 13 of the Ministry of communications in 1990 and implement the maintenance and repair system of "regular inspection, compulsory maintenance and repair as appropriate". On this premise, combined with the actual situation of concrete mixer truck, do a good job in maintenance and repair. In terms of daily maintenance, in addition to routine maintenance of vehicle engine, chassis and other parts, the concrete mixer truck must also do the following maintenance work.