Sealing device for axle bearing

摘要

A sealing device for an axle bearing includes a lubricant maintained on sliding contact surfaces, thereby suppressing elevation of torque due to the depletion of grease. A lubricant-adsorbing layer comprises a thickener and a binder. The lubricant comprises a base oil and a thickener. The thickener and the thickener are mutually attracted. A lubricant layer of a prescribed thickness is formed on the lubricant-adsorbing layer. This lubricant layer adheres closely to the lubricant-adsorbing layer making it difficult to separate the lubricant layer from the lubricant-adsorbing layer.

主权项

1. A sealing device for a bearing having an inner race, an outer race, rolling elements fitting between the inner race and the outer race, and a lubricant filling a space around the rolling elements, the device being disposed between the inner race and the outer race to prevent leakage of the lubricant, the device comprising:
a seal member reinforced by a core metal; and an L-shaped cross-sectional slinger having a sliding contact surface formed in sliding contact with a lip portion of the seal member, wherein at least one of the sliding contact surface of the slinger and the lip portion has a lubricant adsorbing layer formed thereon for adsorbing the lubricant, the lubricant adsorbing layer being made of a thickener for grease and a binder.