[Object] A wheel bearing apparatus is provided which can prevent an edge road of a contact ellipse of a ball and improve noise level and life of the bearing. [Solution] In the wheel bearing apparatus configured of a double row angular contact ball bearing, a height of a shoulder of a shoulder portion 18 of an outer member 12 with respect to a ball diameter of a double ball 14 row is set to be in a range of 0.35 to 0.50. A corner 19 of the shoulder portion 18 is configured of a relief surface 19a which is formed in a straight line that is a tangent line of an outer raceway surface 12a, and a chamfered portion 19b which is round in a circular arc having a predetermined radius of curvature r. The corner 19 is formed simultaneously by a formed grinding wheel forming the double row outer raceway surface 12a and formed smoothly continuous from each outer raceway surface 12a. A length in the radial direction of the relief surface 19a is set to be greater than or equal to 0.2 mm.
VEHICLE WHEEL BEARING DEVICE
LAGERVORRICHTUNG FÜR FAHRZEUGRÄDER
DISPOSITIF DE ROULEMENT DE ROUES DE VÉHICULE
2017-05-31
Patent
Electronic Resource
English