Patent ID: 6668673
Filing Date: 2003-12-30
Classification: F16C,F16H,Y10T

Abstract:
A ball screw with ball screw retainer cage comprising:a screw bolt having a spiral groove formed along an outer surface thereof; a hollow nut body being sleeved over said screw bolt, having a spiral groove formed along an inner surface thereof, corresponding to the spiral groove of said screw bolt; a plurality of rolling balls interposed in said grooves of said screw bolt and said nut body; and, a plurality of rolling ball retainer cages disposed between said screw bolt and said nut body, each said retainer cage defining a plurality of retainer holes, each rolling ball occupying one said retainer hole so that adjacent ones of said rolling balls are kept isolated one from the other, an extended portion being formed at an outer side of said retainer cage along said spiral groove of said nut body, a protrusion being formed from both sides of said extended portion at each said retainer hole to prevent said rolling ball received therein from dropping off outwardly; each said retainer cage having a joint hole provided at an end portion thereof, adjacent ones of said retainer cages being linked together by a connecting belt engaging said joint holes thereof.