Constant velocity ratio universal joint

Details Constant velocity ratio universal joint Constant velocity ratio universal joint

1990-01-29

1990-11-06

Hannon, Thomas R.

Rotary shafts, gudgeons, housings, and flexible couplings for ro

Coupling accommodates drive between members having...

Coupling transmits torque via radially spaced ball

464906, F16D 323

Patent

active

049682873

ABSTRACT:
A constant velocity ratio universal joint comprises a hollow outer joint member (1), an inner joint member (2), a plurality of balls engaging grooves (5, 14) in meridian planes in the outer and inner joint members, and a cage (17) with windoes (21) wherein the balls are guided. The grooves in the joint members ae of non-undercut configuration considered from one end (6) of the outer joint member, and between its grooves the inner joint member has a spherical surface (13) which engages a complementary surface (8) on a member (9) connected to he outer joint member at its end (6) to center the joint members relative to one another. The cage has an internal part-spherical surface (18) which engages the surface (13) of the inner joint member, the surface (18) extending from the cage end oppsite the end (6) of the outer joint member, and ending before a plane containing the centers of the balls, while the outer surface of the cage has a clearance from the internal surface of the outer joint member. The configuration of the grooves is such that the balls always engage them with a cage control angle .beta. which is at least 7.degree., sufficient to hold the cage surface (18) in engagement with the inner joint member and prevent any tendency for the joint to become jammed against articulation. The joint is able to articulate with low frictional resistance.

REFERENCES:
patent: 4185476 (1980-01-01), Krude
patent: 4589857 (1986-05-01), Okoshi
patent: 4608028 (1986-08-01), Welschof et al.
patent: 4820240 (1989-04-01), Girguis
patent: 4915672 (1990-04-01), Girguis

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