Patent ID: 9638312
Date: 2017-05-02
CPC Classifications: B60K,B60W,F16H,Y02T,Y10S

Claim:
1. A drive unit that transfers rotation of a motor that serves as a drive source of a vehicle to drive wheels to transfer torque of the motor to the drive wheels, comprising: a speed reducer including a plurality of gears having helical teeth and a plurality of bearings that rotatably support the gears, wherein the speed reducer is configured such that a direction of an axial force that acts in an axial direction of the bearings from the gears when the vehicle travels forward is opposite to a direction of an axial force that acts in the axial direction of the bearings from the gears when the vehicle travels rearward, wherein the speed reducer is configured such that a first bearing of the plurality of bearings receives the axial force when the vehicle travels forward, and a second bearing of the plurality of bearings receives the axial force when the vehicle travels rearward, wherein the speed reducer is configured such that the first bearing that receives the axial force when the vehicle travels forward and the second bearing that receives the axial force when the vehicle travels rearward are different in size from each other.