Ball screw device having lubricating device

摘要

A ball screw device includes a ball nut rotatably engaged onto a screw shaft for forming a gap between the ball nut and the screw shaft and for receiving a lubricating oil and for forming a helical raceway between the ball nut and the screw shaft, a number of bearing members engaged between the ball nut and the screw shaft and in the helical raceway, and a forcing device includes a barrel having an outer helical member for forming a helical channel and for receiving the lubricating oil, and for forcing the lubricating oil to flow into the gap between the ball nut and the screw shaft and to effectively lubricate the bearing members when the barrel is rotated relative to the screw shaft.