Wälzlager.

摘要

Cages of large bearings are normally made of plate-steel or brass. Due to relativelly high speed excessive wear, noise and surface defects develop between the cage (7) and rolling bodies (1). The claimed design obviates these known disadvantages by covering the contact area (11) between cage-pockets and rolling bodies with a rubber layer (13) whereby the thickness of the layer should preferably be in order of 0.5-0.05 times the cage material thickness. This makes it possible to take up large forces between rolling bodies and the cage without crushing the rubber layer. The lubricant film thickness will be 10 to 100 times larger than in a steel or plastic cage and therefore an optimum hydro-dynamic lubrication obtained. Besides high degree in manufacturing the cage or rubber layers is not required as long as the errors in form and surface roughness can be taken up by elastic deformation of the rubber layer (13). Further the oil film thickness will be less sensitive to local loads and pressures.