| US 7,614,318 B2 | ||
| Recirculating ball screw and nut drive | ||
| Kurt Husistein, Burg AG (Switzerland) | ||
| Assigned to Eichenberger Gewinde AG, Burg AG (Switzerland) | ||
| Filed on Mar. 22, 2007, as Appl. No. 11/689,747. | ||
| Claims priority of application No. 1153/06 (CH), filed on Jul. 18, 2006. | ||
| Prior Publication US 2008/0016973 A1, Jan. 24, 2008 | ||
| Int. Cl. F16H 1/24 (2006.01) | ||
| U.S. Cl. 74—424.87 [74/424.83] | 5 Claims |
| 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.
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