Patent ID: 10890244

Abstract:
A power transmission device (100) includes: a rotary shaft (4) extending in the vehicle width direction to transmit power to drive wheels of the vehicle; a rotary parts housing chamber (16) disposed on the end section or in its vicinity of the rotary shaft (4) in the axial direction and adapted to house rotary parts including a clutch (5R); and a breather chamber (81) disposed on the outside (the upper side) of the rotary shaft (4), wherein a first communication passage (80) is provided to communicate with the breather chamber (81) and the rotary parts housing chamber (16). The oil intruded into the breather chamber (81) is discharged from the breather chamber (81) through the first communication passage (80) and is led to the rotary parts housing chamber (16) by the negative pressure due to the pull-in to the rotary parts housing chamber (16) accompanying rotation of the rotary parts.