Importance

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Abstract

A vibrating screen apparatus capable of maintaining operation when in an out-of-level orientation is disclosed. The apparatus includes a generally rigid frame having first and second sidewalls and top and bottom screen decks extending therebetween. The frame is coupled to a stationary chassis or base by spring mount assemblies that each include an adjustable spring support system coupled to the frame and heavy coil springs which are positioned between the adjustable spring support system and the stationary base. Four rubber shear spring assemblies are also coupled between the stationary base and the sidewalls. The rubber shear spring assemblies help prevent shifting of the frame relative to the base if an out-of-level condition occurs and also help reduce lateral forces applied to the coil springs caused during out-of-level conditions. The apparatus further includes eccentric drive and driven shafts that are rotatably supported by spherical roller bearings. First and second oil housings are located adjacent the respective first and second sidewalls and define oil chambers to lubricate the shaft bearings. Labyrinth seals are located on the shafts adjacent each bearing and are designed to prevent lubricating oil from passing beyond them. O-rings are coupled to each of the shafts adjacent the labyrinth seals and are designed to direct lubricating oil which passes beyond the labyrinth seals into supplemental oil collection pockets that direct the lubricating oil to the oil chambers of the oil housings for re-use in lubricating the bearings.

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First Claim