Universal joint cross member trunnion and method

Details Universal joint cross member trunnion and method Universal joint cross member trunnion and method

B - Operations, Transporting

23

P

26/180

B23P 15/00 (2006.01) B23P 9/00 (2006.01) B23P 17/04 (2006.01) F16C 19/46 (2006.01) F16C 33/10 (2006.01) F16D 3/16 (2006.01) F16D 3/41 (2006.01)

Patent

CA 1223434

ABSTRACT An improved lubrication means for anti-friction bearing trunnion systems of the type normally having smooth and/or ground contours in universal joint assemblies includes a plurality of closely spaced lands and lubrication grooves circumferentially disposed about each trunnion. The lands provide actual bearing contact surfaces for needle roller bearings, while the grooves provide means for retention of lubrication oil between bearing and trunnion interfaces. In a preferred embodiment, the lands and grooves are uniformly and alternately spaced, and each are oriented in planes perpendicular to the longitudinal axes of the trunnions. One preferred method of making the improved trunnion includes the steps of machining and heat treating, without grinding as an intermediate or final step. Additionally, a step of roll burnishing the lands of the trunnions prior to heat treatment may be included.

423220

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