US 5,957,000 AGranted

Lubricated worm gear driven slewing bearing

OwnerPaul A. Pecorariinventor

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Abstract

A worm gear driven slewing bearing for use with boom lifts, utility cranes, light turning devices and medium duty cranes wherein the worm gear and the teeth of the bearing are totally enclosed from the outside elements and a cavity formed by the housing is filled with lubricant to lubricate the worm and gear teeth.

Claims1

Dependent claims

I claim a worm gear driven slewing bearing comprising:

a housing having a cavity, said house of a generally circular bowl shape with a base and curved walls perpendicular to the base and an aperture centered in the base;
an o-ring groove in the housing concentric with the aperture within the base;
a filler plug which fits in an opening in the wall of the base;
an o-ring which sits in the o-ring groove in the housing;
an inner ring, with an outer and inner surface and two sides, which is attached to the housing along one of its sides by means of fasteners;
an inner bearing race created by an annular groove in the outer surface of the inner ring;
an inner ring wiper seal ridge cut in the outer surface of the inner ring and the side of the inner ring opposite to the side which connects to the housing;
an inner wiper seal which is pressed into the inner ring wiper seal ridge;
a plurality of balls which ride in the inner bearing race;
an outer ring with an outer and inner an surface and two sides;
a plurality of gear teeth around a portion of the entire perimeter of the outer surface of the outer ring;
an outer wiper seal mating surface on the outer surface of the outer ring adjacent to the plurality of gear teeth;
an outer ring bearing race formed by an annular groove in the inner surface of the outer ring which contains the plurality of balls which ride in the inner bearing race;
a plurality of threaded holes in a circular pattern on the side of the outer ring opposite the housing;
an outer wiper seal which is pressed into the housing and mates with the outer wiper seal mating surface;
a worm housing which is formed into the housing;
a plurality of bearing journals within the worm housing;
a worm on a two ended shaft which rotates within the bearing journals and the worm mates to the gear teeth in the outer ring;
a plurality of worm shaft seals which coordinate with the worm shaft;
the cavity formed within the housing is filled with liquid lubricant.

17 more elements

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Abstract

I claim a worm gear driven slewing bearing comprising:

a housing having a cavity, said house of a generally circular bowl shape with a base and curved walls perpendicular to the base and an aperture centered in the base;
an o-ring groove in the housing concentric with the aperture within the base;
a filler plug which fits in an opening in the wall of the base;
an o-ring which sits in the o-ring groove in the housing;
an inner ring, with an outer and inner surface and two sides, which is attached to the housing along one of its sides by means of fasteners;
an inner bearing race created by an annular groove in the outer surface of the inner ring;
an inner ring wiper seal ridge cut in the outer surface of the inner ring and the side of the inner ring opposite to the side which connects to the housing;
an inner wiper seal which is pressed into the inner ring wiper seal ridge;
a plurality of balls which ride in the inner bearing race;
an outer ring with an outer and inner an surface and two sides;
a plurality of gear teeth around a portion of the entire perimeter of the outer surface of the outer ring;
an outer wiper seal mating surface on the outer surface of the outer ring adjacent to the plurality of gear teeth;
an outer ring bearing race formed by an annular groove in the inner surface of the outer ring which contains the plurality of balls which ride in the inner bearing race;
a plurality of threaded holes in a circular pattern on the side of the outer ring opposite the housing;
an outer wiper seal which is pressed into the housing and mates with the outer wiper seal mating surface;
a worm housing which is formed into the housing;
a plurality of bearing journals within the worm housing;
a worm on a two ended shaft which rotates within the bearing journals and the worm mates to the gear teeth in the outer ring;
a plurality of worm shaft seals which coordinate with the worm shaft;
the cavity formed within the housing is filled with liquid lubricant.

17 more elements