Why does the phenomenon of car gearbox gears occur

Gearbox gearing is a phenomenon of gearbox gear damage caused by operating errors. In the case of automobile gearboxes, it is generally required to step on the clutch to the end when manually shifting, and then perform a shift operation. When the vehicle speed and engine speed are basically the same, loosen it. When the clutch is turned on and the gear shift is completed, under what circumstances is it easy to hit gears? It is often that the clutch is not completely separated, and the gear shift operation is carried out. Not only does the gear noise occur during gear shifting, but it is also easy to cause gear toothing. In addition, if the lubricating oil impurities in the gearbox are large, such as long-term wear iron filings, if Caught in the middle of the transmission gear, it is also easy to cause tooth breakage.

　　
There is a very important device inside the structure of the manual gearbox, which is the "synchronizer". The function of the synchronizer is very obvious, that is, when the gear is shifted, the speed of the power output gear is faster than the gear that is about to be changed into this gear. If there is no synchronizer, a slow-rotating gear is forcibly inserted into a high-speed gear. In the rotating gear, the phenomenon of tooth punching will definitely occur. The function of the synchronizer is to increase the speed of the gear that is about to be shifted into the gear to a state that is synchronized with the speed of the output gear when the gear shifting action occurs, so that there will be no gear breaking when shifting.　

　
Understand that the phenomenon of hitting gears occurs, so why do many cars do not hitting gears when driving forward, but hitting gears as soon as they are engaged in reverse gear? That's because the reverse gear of many models is not equipped with reverse gear synchronizer. Manual gearboxes without reverse gear synchronizer will have the phenomenon of engaging reverse gear and gearing. Of course, this is also very much related to the user's habits, because the reverse gear itself does not contain a synchronizer, it is necessary to completely stop the vehicle, so that the power output end speed is reduced to the reverse gear (this time the reverse gear is stationary) The speed difference between) becomes smaller, so as to ensure that the reverse gear is smoother and there is no gearing.