Automatic shift function of hand since the transmission

In recent years, which has the function of automatic shift hand - the one transmission (AMT), the domestic heavy commercial vehicle manual hoist boom, developing rapidly, the loading rate is rising. By drivers, however, the use of arm for gear transform mechanical manual transmission (MT), despite the challenges, but as a result of product performance has a comparative advantage is very outstanding, therefore, under the current national conditions, is chainb lock a heavy commercial vehicles of the most widely used variable speed device. In the field of heavy MT gearbox, the loading rate is the highest gear more modular MT transmission. From the point of product technical characteristics, modular MT gearbox, generally there are two kinds, one kind is times file (sectional match) combined, the other is a half (plug-in match) combined. 1.1 times the combined in terms of the structure of products, times file combined MT gearbox, is back in the main transmission series to install a second vice transmission (high and low), the main transmission gear by the increase in the number 1 times. Gear transmission ratio increased by numerical value is equal to the product of the main transmission gear ratio and auxiliary transmission ratio, number of logarithmic is less than the gear and gear. Therefore, the size of the gearbox casing is shortened, it shorten the length of the shaft, but stiffness increased, thus increasing the transmission capacity.