Journal bearing

Details Journal bearing Journal bearing

1985-03-29

1986-02-25

Footland, Lenard A.

Cutlery

308 4A, 308 6R, 308 6A, 384126, 384271, F16C 2912

Patent

active

045725896

ABSTRACT:
The invention relates to a guide bushing used to maintain alignment of a rotary shaft and in particular to a guide bushing for use as a mining deck bushing. When drilling blast holes in surface mining operations, it is conventional to pass the drill pipe through a deck bushing located on the floor or deck of the blast hole drill. During drilling operations the drill pipe has a tendency to run off laterally, and vibrate vertically. The purpose of the deck bushing is to keep the drill pipe as straight as possible, and prevent wear of the more costly deck. The present invention provides a guide bushing for use as a deck bushing and is equipped with a rotatable inner sleeve which is supported by angular journal bearing surfaces and ball bearings located in elongate annular grooves, which allow the guide bushing to maintain alignment of the drill pipe without premature failure of the ball bearings, grooves or other bearing surfaces.

REFERENCES:
patent: 466438 (1892-01-01), Simonds
patent: 466445 (1892-01-01), Simonds
patent: 4372622 (1983-02-01), Cheek
patent: 4480843 (1984-11-01), Springer

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