Differential limiting mechanism of differential apparatus

A differential limiting mechanism arranged in a differential apparatus which has a differential casing receiving an input from an engine and rotated around a main rotating axis as a center, a pinion shaft arranged within said differential casing and extending in a direction crossing said main rotating axis and rotated integrally with said differential casing, a pinion gear rotatably arranged around an axis of said pinion shaft, and has a pair of output side gears rotatably arranged with said main rotating axis as a center and engaged with said pinion gear and receiving thrust force at a differential rotating time;

• said differential limiting mechanism limiting a differential movement between said pair of side gears and comprising:
• a first cone portion formed in the shape of a tapered face around the main rotating axis such that the first cone portion is arranged within said differential casing and is rotated integrally with one of said pair of side gears and is inclined with respect to said main rotating axis;
• and
• a second cone portion formed in the shape of a tapered face such that the second cone portion is arranged within said differential casing and is rotated integrally with the differential casing and is inclined opposite to said first cone portion and is pressed by said first cone portion and is slid together with said first cone portion when said one of the side gears receives the thrust force;
• said first and second cone portions coming in contact with each other so as to prevent the contact between the first and second cone portions only in a small diameter portion most proximate to said main rotating shaft in a state in which said side gear receives the thrust force.