| 摘要 |
PROBLEM TO BE SOLVED: To provide a centering mechanism for a constant velocity coupling capable of ensuring lubrication of a spherical bearing part even after high speed rotation. SOLUTION: This centering mechanism for a constant velocity coupling is provided with a spherical bearing formed to insert a shaft part 16 connected with a pin yoke, into an axial hole 15 of a spherical body 1 and to mount an outer ring 3 on a spherical outer peripheral surface of the spherical body 1, and the distance d1 between a center axis Z of a cylinder part 5 connected with a socket yoke and a radial inner end 3A-1 of a concave circumferential raceway track 3A of the outer ring 3 fixed to the inner peripheral surface of the cylinder part 5 is made larger than the distance d2 between the center axis Z and a radial outer end 10A-1 of a sliding contact face 10A of a ring-like spherical seal 10 fixed to the inner peripheral surface of the cylinder part 5 between the outer ring 3 and an opening of the cylinder part 5. Accordingly, even when grease 28 leaks out by centrifugal force, grease remaining on a level L1 up to the radial outer end 10A-1 of the sliding contact face 10A of the spherical seal 10 lubricates the concave circumferential raceway track 3A of the outer ring 3. |
