Patent ID: 7175349
Filing Date: 2007-02-13
Classification: B60B,F16C

Abstract:
1. A wheel rotation supporting apparatus comprising; a knuckle made of a light alloy and having a supporting hole; an outer ring supported by and secured to the knuckle in a state where it is internally fitted to the supporting hole; a double row outer ring raceway provided on the inner peripheral surface of the outer ring; a hub having a flange on the axial outside end for supporting and securing a wheel, with the axial middle portion up to an axial inside end portion which is inserted into the inner diameter side of the outer ring; a double row inner ring raceway provided on the outer peripheral surface of the hub; and a plurality of rolling elements rotatably provided respectively between the inner ring raceways and the outer ring raceways, wherein an inner peripheral surface of the supporting hole of the knuckle is an inner peripheral surface of a cylindrical liner made from steel, which is inserted when casting the knuckle, the outer ring is internally fitted to the liner, and wherein the shape of the generatrix of the outer peripheral surface of the liner is nonlinear, and the shape in relation to the circumferential direction is noncircular, so that the liner is secured to the knuckle while being kept from axial displacement and rotation in relation thereto.