Structure of manual transmission

　　Manual transmission is a transmission that needs to change the transmission ratio by manually moving the transmission lever. Manual transmission is mainly composed of housing, transmission components (input and output shaft, gear, synchronizer, etc.) and operating components (shift rod, fork, etc.).

　　Operation principle of manual transmission

　　The operation principle of manual transmission is to switch the driving gear on the central shaft by moving the shift lever, and connect with the power output shaft through different gear combinations, so as to change the torque and speed of the driving wheel. Let's take a look at the structure diagram of the simplified manual transmission (second gear).

　　It is suggested that the power input shaft is directly connected with the power output shaft through a central shaft. As shown in the figure above, the two gears on the central shaft (red) and the two gears on the power take-off shaft (blue) roll with the output of the recommender. However, if there is no synchronizer (purple) engagement, the two gears (blue) can only rotate above the power output shaft (that is, the output shaft will not roll). The synchronizer in the picture is in the center state, which means that the transmission is in neutral.

      Article from：http://www.chnfppg.com.cn