Special mechanisms mainly include: power takeoff, front and rear supports of mixing drum, reducer, hydraulic system, mixing drum, operating mechanism, cleaning system, etc.
取力裝置：國產(chǎn)混凝土攪拌運輸車(chē)采用主車(chē)發(fā)動(dòng)機取力方式。取力裝置的作用是通過(guò)操縱取力開(kāi)關(guān)將發(fā)動(dòng)機動(dòng)力取出，經(jīng)液壓系統驅動(dòng)攪拌筒，攪抖筒在進(jìn)料和運輸過(guò)程中正向旋轉，以利于進(jìn)料和對混凝土進(jìn)行攪拌，在出料時(shí)反向旋轉，在工作終結后切斷與發(fā)動(dòng)機的動(dòng)力聯(lián)接。
Power take-off device: 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, drive the mixing drum through the hydraulic system, and 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.
液壓系統：將經(jīng)取力器取出的發(fā)動(dòng)機動(dòng)力(現在一般都是后置全功能取力器)，轉化為液壓能(排量和壓力)，再經(jīng)馬達輸出為機械能(轉速和扭矩)，為攪拌筒轉動(dòng)提供動(dòng)力。
Hydraulic system: convert the engine power taken out by the power take-off (now generally rear full-function power take-off) into hydraulic energy (displacement and pressure), and then output into mechanical energy (speed and torque) through the motor to provide power for the rotation of the mixing drum.
減速機：將液壓系統中馬達輸出的轉速減速后，傳給攪拌筒。
Reducer: after decelerating the speed output by the motor in the hydraulic system, it is transmitted to the mixing drum.
操縱機構：
Operating mechanism:
a．控制攪拌筒旋轉方向，使之在進(jìn)料和運輸過(guò)程中正向旋轉，出料時(shí)反向旋轉。
a. Control the rotation direction of the mixing drum to make it rotate forward during feeding and transportation and reverse during discharging.
b．控制攪拌筒的轉速。
b. Control the rotating speed of the mixing drum.
攪拌裝置：它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，它是由耐磨薄鋼板制成，為了能夠自動(dòng)裝、卸混凝土，其內壁焊有特殊形狀的螺旋葉片。轉動(dòng)時(shí)混凝土沿葉片的螺旋方向運動(dòng)，在不斷的提升和翻動(dòng)過(guò)程中受到混合和攪拌。在進(jìn)料及運輸過(guò)程中，攪拌筒正轉，混凝土沿葉片向里運動(dòng)，出料時(shí)，攪拌筒反轉，混凝土沿著(zhù)葉片向外卸出。
Mixing device: 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 plate. In order to automatically load and unload concrete, its inner wall is welded with spiral blades of special shape. 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.
攪拌筒的轉動(dòng)則是靠液壓驅動(dòng)裝置來(lái)保證。裝載量為3～6立方。的混凝土攪拌運輸車(chē)一般采用由汽車(chē)發(fā)動(dòng)機通過(guò)動(dòng)力輸出軸帶動(dòng)液壓泵，再由高壓油推動(dòng)液壓馬達驅動(dòng)攪拌筒，裝載量為9～12立方的則由車(chē)載輔助柴油機帶動(dòng)液壓泵驅動(dòng)液壓馬達。葉片是攪拌裝置中的主要部件，損壞或嚴重磨損會(huì )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(huì )使混凝土出現離析。
The rotation of the mixing drum is guaranteed by the hydraulic driving device. The loading capacity is 3 ~ 6 cubic meters. Generally, the truck engine drives the hydraulic pump through the power output shaft, and then the high-pressure oil drives the hydraulic motor to drive the mixing drum. For the truck with a loading capacity of 9 ~ 12 cubic meters, the on-board auxiliary diesel engine drives the hydraulic pump to drive the hydraulic motor. 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：清洗系統的主要作用是清洗攪拌筒，有時(shí)也用于運輸途中進(jìn)行干料攪拌。清洗系統還對液壓系統起冷卻作用。
Cleaning system: 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.
