Patent ID: 8202188
Filing Date: 2012-06-19
Classification: F16H

Abstract:
1. A coupling structure for a differential assembly and drive shafts, the structure comprising: a differential assembly at least including: a pair of right and left side gears which are disposed opposite to each other in a direction of an axle shaft within a differential case supported rotatably about the axle shaft with respect to a differential carrier; a pinion shaft body which is disposed between the pair of right and left side gears, the pinion shaft body including at least a pair of pinion shafts which extend radially outwardly opposite to each other from a coupling ring having a hole about the axle shaft, the pinion shaft body including a through hole formed longitudinally; and a pinion gear which is rotatably mounted on an end of the pinion shaft to mate with the pair of right and left side gears; a pair of right and left drive shafts which are coupled nonrotatably to the pair of right and left side gears, respectively, but movably in the direction of the axle shaft, and disposed with end faces thereof being opposed to each other by a given distance; a pair of right and left coupling heads each including a coupling hole at the point of intersection of an axial line of the pair of right and left drive shafts and an axial line of the pinion shaft, the coupling heads being attached to the pair of right and left drive shafts, respectively, to be rotatable about the axle shaft and not movable in the direction of the axle shaft, with an end portion thereof being disposed in the coupling ring of the pinion shaft body; and a coupling shaft which is inserted into the through holes of the pair of opposing pinion shafts through the coupling holes of the pair of right and left coupling heads.