Patent ID: 8025128
Filing Date: 2011-09-27
Classification: F16H,Y10T

Abstract:
1. A ball screw lubricative sealing device comprising: generally cylindrical case members having attachment parts to be attached to both ends of a screw nut, respectively; a plurality of thin seal plates having a hole each and fitted inside each of the case members, the thin seal plates being displaced in respective circumferential directions and stacked together, and a plastic wiper in a discoid shape, having a hole, and fitted with a space from the thin seal plates inside each of the case members to which the thin seal plates are fitted, wherein the hole of each of the thin seal plates and the hole of the plastic wiper each has a shape corresponding to a lateral cross-sectional shape of a screw groove of a ball screw shaft, the case members are each provided with a groove for fitting the thin seal plates, an annular projection for forming the space, and a groove for fitting the plastic wiper, outer circumferential surfaces of the thin seal plates are bonded to an inner circumferential surface of the groove using an adhesive; and the plurality of thin seal plates are impregnated with a lubricant and comprise resilient rubber material penetrated into surfaces of thin polyester plastic fibers.