Patent ID: 7614318
Filing Date: 2009-11-10
Classification: F16H,Y10T

Abstract:
1. A recirculating ball screw and nut drive comprising: a spindle; a spindle nut guided on the spindle; balls guided between the spindle and the spindle nut, in a working passage defined by grooves of the spindle and spindle nut; deflection pieces arranged on both ends of the spindle nut to divert the balls out of the working passage into a return passage accommodated in the spindle nut, and to divert the balls out of the return passage into the working passage accommodated in the spindle nut, wherein the ball deflection pieces are annular and composed of at least two circular-ring sectors; deflection heads coupled in part to each circular-ring sector, such that the deflection head is divided in a plane tangential to the spindle when mounted on the spindle nut, wherein the deflection heads project axially in the direction of an orifice of the return passage and radially on the circumference of the ball deflection pieces; and a pin and blind hole formed on the at least two circular-ring sectors to hold the ring sectors together in the vicinity of the deflection head in the plane tangential to the spindle.