Patent ID: 7104913

Claim:
A differential gear apparatus for vehicles comprising an internal gear, a sun gear disposed at the inner side of said internal gear with an axis thereof aligned with that of said internal gear, a carrier including a circular cylindrical supporting part inserted between said internal gear and said sun gear with an axis thereof aligned with the axes of said internal gear and said sun gear, said supporting part being formed with a receiving hole whose axially outer and inner sides are open, and a planetary gear rotatably received in said receiving hole of said carrier and meshed with said internal gear at said open part on the outer side of said receiving hole and meshed with said sun gear at the open part on the inner side of said receiving hole, wherein one side part of an inner peripheral surface of said receiving hole in a peripheral direction of said supporting part is constituted of an arcuate face having a same radius of curvature as the radius of said planetary gear, the other side part is constituted of an arcuate face having a radius of curvature equal to or larger than the radius of said planetary gear, and when said planetary gear is contacted with said one side part or said other side part of the inner peripheral surface of said receiving hole, a gap is formed between said other side part of the inner peripheral surface of said receiving hole and the outer peripheral surface of said planetary gear.