FIXED TYPE CONSTANT VELOCITY UNIVERSAL JOINT AND WHEEL BEARING DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To facilitate design for fitting a shaft to the shape of a mating member to be connected and reduction of the number of components, and to reduce dimension in the axial direction.

SOLUTION: A cylindrical outer ring 30 is commonized, a fixed type joint part 10 is disposed at one end thereof, and a sliding type joint part 20 is disposed at another end thereof. The shaft 21 is connected to an inner ring of the sliding type joint part 20 in such a manner that torque can be transmitted by spline fitting. A convex spherical surface part 25 is provided at an end part of the shaft 21 of the sliding type joint part 20, and a concave spherical surface part 15 is provided at the fixed type joint part 10. The fixed type joint part 10 and the sliding type joint part 20 are connected through a spherical pair 40 comprising the convex spherical surface part 25 and the concave spherical surface part 15. The convex spherical surface part 25 comprises a hollow-shaped head part 25a spherically fitted in an inner spherical surface of the concave spherical surface part 15 and a neck part 21a inserted and fitted in a hollow part 25b of the head part 25a. The maximum diameter D1of the neck part 21a is set smaller than the spline minimum inner diameter D2of an inner ring 22 of the slide type joint part 20.

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