Patent ID: 6393930
Filing Date: 2002-05-28
Classification: F16H,Y10T

Abstract:
A ball screw including a cylindrical housing having a cylindrical inner surface formed with a female thread and a plurality of balls arranged in a space between said female thread and a male screw corresponding to said female thread, the ball screw comprising:a ball circulation tube with a male screw formed on its outer cylindrical surface which corresponds to said female thread of said housing and formed with ball openings to penetrate from both ends of said male screw toward an inner part; and a ball circulation section with an inner return path formed on its cylindrical outer surface, whose start point and end point are matched with said ball openings of said ball circulation tube, said ball circulation tube being fixed by a coupling nut coupled to said ball circulation section, wherein, when said ball circulation tube and said ball circulation section rotate in unison, said balls circulate along said inner return path of said ball circulation section.