Power transmission apparatus.

摘要

To incorporate a viscous coupling type power transmission apparatus for a four-wheel driven automotive vehicle with an antiskid braking system, viscous torque. transmission from a first rotary transmission shaft (67a) (coupled to the front wheel shaft) to a second rotary transmission shaft (67b) (coupled to the rear wheel shaft) is intermitted by a clutch mechanism (85) provided for the power transmission apparatus whenever a foot brake is applied. That is, when a foot brake pressure is applied to the brake member (140) of the power transmission apparatus, the clutch mechanism (85) is disengaged via a cam ring (121) to decouple the first rotary transmission shaft from the second rotary transmission shaft.