Patent ID: 6595327
Filing Date: 2003-07-22
Classification: F16H,Y10T

Abstract:
A linear motion unit, comprising:a rod having an axis S and at least one helical groove in the outer circumferential surface thereof; a runner that is arranged to be movable back and forth on the rod along the axis S, said runner having at least one internal helical groove on the inner surface thereof which forms, together with said at least one groove on the rod, a helical channel; at least one lubricating device comprising a base body having an inner circumferential surface, which at least partially surrounds the rod, and an outer circumferential surface, said inner circumferential surface having at least one helical groove formed therein and accommodating at least one correspondingly helical lubricating element in lubricating contact with the rod; at least one lubricant reservoir carried by the runner, the lubricant reservoir being arranged radially outside of the lubricating element with respect to the axis S of the rod, said outer circumferential surface of said base body forming, at least in part, an inner boundary wall of the lubricant reservoir; and a plurality of rollers in said at least one helical channel, said roller supporting said rod and said runner with re to one another.