Universal joint having slip bush

Details Universal joint having slip bush Universal joint having slip bush

2011-07-05

2011-07-05

Binda, Greg (Department: 3679)

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

Coupling facilitates relative axial motion between coupled...

Coupler includes antifriction rolling body engageable with...

Reexamination Certificate

active

07972217

ABSTRACT:
Universal joint having slip bush including a tube, a slip bush inserted into the tube, and a shaft inserted into and slidably engaged with the tube via the slip bush. The universal joint further includes: one or more rows of guide holes formed by perforating a circumferential wall of the slip bush, the rows being arranged in the longitudinal direction of the slip bush; one or more guide balls fitted in the guide holes, respectively; and one or more C-type parts longitudinally formed on the circumferential wall of the slip bush. When axial pressure is applied to the universal joint in a state in which rotational torque is applied to the universal joint, the guide balls fitted in the guide holes come into contact with the inner circumferential surface of the tube, thereby reducing sliding frictional force while producing rolling frictional force so that the universal joint can be smoothly collapsed. In addition, the guide balls serve as supports when torsional fracture torque is applied to the slip bush, thereby improving the torsional fracture strength, which in turn improves a safety factor.

REFERENCES:
patent: 4176888 (1979-12-01), Teramachi
patent: 2005/0215330 (2005-09-01), Foster-Hamilton et al.
patent: 2007/0215777 (2007-09-01), Mills
patent: 203 18 654 (2004-04-01), None
Wagner, E. R., “Universal Joints” in Universal Joint and Driveshaft Design Manual, AE-7, Society of Automotive Engineers, Inc., p. 35, TJ1079.S62 1979.
Chinese Office Action, w/ English translation thereof, issued in Chinese Patent Application No. CN 200810092463X dated Nov. 13, 2009.

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