The main transport medium of self loading mixer truck is premixed concrete, which is generally wet material transport. The requirement of transport efficiency is very high, because the period of validity of wet material is relatively short. If it exceeds the period of validity, it will condense into blocks and lose its function. There are many accessories on the mixer truck, among which the important ones are three hydraulic parts: reducer, hydraulic pump and hydraulic motor, Now we mainly to understand the knowledge of imported reducer. There are two kinds of reducers: imported and domestic. Generally, domestic brands are used in small mixer trucks, while imported brands are used in large mixer trucks. Reducers are mainly composed of box, reducer accessories, gears, shafts and bearings.

自上料攪拌車首先看箱體：它是減速機(jī)的重要組成部分，是傳動(dòng)零件的基座，必須具備足夠的強(qiáng)度和剛度，箱體通常用灰鑄鐵制作，對(duì)于重載或者有沖擊載荷的減速機(jī)也可采用鑄鋼箱體，單體生產(chǎn)的減速機(jī)，為了簡(jiǎn)化制作工藝，降低生產(chǎn)成本，可采用鋼板焊接的箱體。

From the feeding mixer, first look at the box: it is an important part of the reducer. It is the base of transmission parts and must have sufficient strength and stiffness. The box is usually made of gray cast iron. For the reducer with heavy load or impact load, the cast steel box can also be used. For the reducer produced by single body, in order to simplify the manufacturing process and reduce the production cost, the box can be used, The box can be welded with steel plate.

減速機(jī)附件：減速機(jī)附件包含的東西比較多，比如加速機(jī)的潤(rùn)滑油，平時(shí)使用過(guò)程中要注意觀察油面的高度、排油、注油等問(wèn)題。

Reducer accessories: reducer accessories contain a lot of things, such as the lubricating oil of the accelerator. During normal use, pay attention to the height of the oil surface, oil drainage, oil filling and other issues.

自上料攪拌車，然后是齒輪、軸及軸承組合：小齒輪與軸制成一體，稱齒輪軸，這種結(jié)構(gòu)用于齒輪直徑與軸的直徑相關(guān)不大的情況下，如果軸的直徑為d，齒輪齒根圓的直徑為df，則當(dāng)df-d≤6——7mn時(shí)，應(yīng)采用這種結(jié)構(gòu)，而當(dāng)df-d＞6——7mn時(shí)，采用齒輪與軸分開為兩個(gè)零件的結(jié)構(gòu)，如低速軸與大齒輪.

This structure is used when the diameter of the gear is not closely related to the diameter of the shaft. If the diameter of the shaft is D and the diameter of the gear root circle is DF, this structure should be adopted when df-d ≤ 6-7mn, and when df-d > 6-7mn, Gear and shaft are separated into two parts, such as low speed shaft and big gear

此時(shí)齒輪與軸的軸向固定平鍵連接，軸上零件利用軸肩、軸套和軸承蓋作軸向固定，兩軸均采用了深溝球軸承。這種進(jìn)口減速機(jī)具有設(shè)計(jì)獨(dú)特、使用壽命長(zhǎng)、噪音低、安全方便等優(yōu)點(diǎn)。

At this time, the gear is connected with the axial fixed flat key of the shaft, the shaft parts are fixed axially by the shaft shoulder, shaft sleeve and bearing cover, and the deep groove ball bearing is adopted for both shafts. The imported reducer has the advantages of unique design, long service life, low noise, safety and convenience.