Battery electric vehicle transmission with disengaging function

A battery electric vehicle transmission with a disengaging function, comprising an input shaft, an output shaft and an intermediate shaft, wherein an input shaft gear is arranged around the input shaft and the input shaft is engaged with a large gear of the intermediate shaft via the input shaft gear, the output shaft is a differential, and a small gear of the intermediate shaft is engaged with a differential gear ring, the input shaft is connected with an auxiliary drive motor, and the output shaft is connected with vehicle wheels;

• the transmission further comprises a synchronizer, wherein an engagement sleeve of the synchronizer is driven by a shift mechanism to switch between an engagement position at which the engagement sleeve is engaged with the input shaft gear and a disengagement position at which the engagement sleeve is disengaged from the input shaft gear;
• the shift mechanism comprises a BLDC motor, a shift gear and a shift fork, the shift gear is driven by the BLDC motor to drive the shift fork to move linearly, and the switching of the engagement sleeve of the synchronizer with respect to the input shaft gear is driven via the linear movement of the shift fork;
• and
• wherein a needle bearing is arranged between the input shaft gear and the input shaft, an axial limit of the needle bearing is controlled by a bushing, and the bushing is locked on the input shaft via a hollow bolt, such that lubricating oil enters the input shaft via a central hole of the hollow bolt, and lubricate a needle through an axial oil hole.