混凝土攪拌車上面的取力器是能把混凝土攪拌車動(dòng)力系統(tǒng)的功率傳遞到附加裝置的齒輪組。取力器也稱功率輸出器，簡(jiǎn)寫為PTO，是英文Power Take Off的首字母縮寫。不光是混凝土攪拌車上有，比如比如自卸車的齒輪泵、攪拌機(jī)的液壓馬達(dá)、消防車的水泵、制冷車的壓縮機(jī)等動(dòng)力的連接，基本都是通過(guò)取力器來(lái)實(shí)現(xiàn)動(dòng)力的傳遞。
The power take-off on the concrete mixer is a gear set that can transfer the power of the power system of the concrete mixer to the additional device. Power takeoff, also known as power output, is abbreviated as PTO, which is the acronym of power take off in English. Not only on the concrete mixer, for example, the gear pump of the dump truck, the hydraulic motor of the mixer, the water pump of the fire truck, the compressor of the refrigeration truck and other power connections are basically realized through the power take-off.
取力器分類主要是按照分類方式的不同來(lái)區(qū)分：一種是按最終功率輸出形式來(lái)分；還有一種就是按取力器本身結(jié)構(gòu)的檔位來(lái)分。
The classification of power takeoff is mainly based on different classification methods: one is based on the final power output form; Another is to divide according to the gear of the power take-off itself.
發(fā)動(dòng)機(jī)后端取力（PTO1）：發(fā)動(dòng)機(jī)后端取力一般都是在飛輪處，它優(yōu)點(diǎn)是不受主離合器控制，但因改變了曲軸未端的結(jié)構(gòu)，對(duì)于平衡會(huì)有一些影響。這種取力形式的應(yīng)用大家比較熟悉的就是水泥攪拌機(jī)。取力器裝在離合器外殼上且在不同工況下攪拌滾筒的旋轉(zhuǎn)方向不同。在進(jìn)料和運(yùn)輸過(guò)程正向旋轉(zhuǎn)，出料反向旋轉(zhuǎn)，工作結(jié)束切斷與發(fā)動(dòng)機(jī)動(dòng)力連接。

Engine rear end power take-off (pto1): the engine rear end power take-off is generally at the flywheel. Its advantage is that it is not controlled by the main clutch, but it will have some impact on the balance due to the change of the structure of the crankshaft end. The familiar application of this power taking form is the cement mixer. The power take-off is installed on the clutch housing, and the rotation direction of the mixing drum is different under different working conditions. In the process of feeding and transportation, it rotates in the forward direction, and the discharge rotates in the reverse direction. At the end of the work, it cuts off the power connection with the engine.
發(fā)動(dòng)機(jī)前端取力（PTO2）通常是曲軸連接，一般都是由正時(shí)齒輪室或由風(fēng)扇、水泵的皮帶輪輸出。例如氣剎制動(dòng)系統(tǒng)中的氣泵，某些專用工作裝置所用的液壓馬達(dá)等。由于該方式的取力器到附加裝置的距離較長(zhǎng)，且需要轉(zhuǎn)換傳動(dòng)方向，若采用機(jī)械傳動(dòng)其結(jié)構(gòu)就很復(fù)雜，因此一般采用液壓傳動(dòng)。
The power take-off at the front end of the engine (PtO2) is usually connected with the crankshaft and is generally output by the timing gear chamber or the belt pulley of the fan and water pump. For example, the air pump in the air brake system, the hydraulic motor used in some special working devices, etc. Because the distance from the power take-off to the additional device is long and the transmission direction needs to be changed, if mechanical transmission is adopted, its structure is very complex, so hydraulic transmission is generally adopted.
按照取力器本身結(jié)構(gòu)的檔位來(lái)分的話，主要分為中置取力器和后置取力器。
According to the gear of the power take-off structure, it is mainly divided into middle power take-off and rear power take-off.

分享題目：混凝土攪拌車取力器的特點(diǎn)有哪些？
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