Driving force distributing apparatus

A driving force distributing apparatus configured to distribute a driving force from a driving source of a vehicle to right and left wheels of the vehicle in a manner that the driving force is differentially transmittable to the right and left wheels and the transmission of the driving force is interruptible,

• the apparatus comprising:
• a case member that rotates upon receiving the driving force;
• a differential gear mechanism housed in the case member, the differential gear mechanism including
• a pair of side gears, and
• a plurality of pinion gears that rotate together with the case member while meshing with the pair of side gears;
• a driving force transmission member coupled to one of the pair of side gears such that the driving force transmission member is not rotatable relative to this side gear;
• and
• a clutch mechanism to transmit a driving force from the driving force transmission member to one of the right and left wheels in a manner that the transmission of the driving force is interruptible, wherein
• the clutch mechanism includes
• a pair of first and second rotational members disposed coaxially such that the first and second rotational members are rotatable relative to each other, and
• a plurality of clutch plates disposed between the first and second rotational members, and
• the first rotational member of the clutch mechanism is spline-fitted to the driving force transmission member.