Nut of a planetary roller screw drive, and method for producing such a nut
AssigneeSchaeffler Technologies AG & Co. KG
InventorsMichael Kurz, Dietmar Rudy, Rainer Kleber, Thomas Motz, Horst Gredy, Matthias Dohr
Life of this patent
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Abstract
A nut (1, 13, 21, 25) for a planetary roller screw drive is provided. A sleeve (14) which is produced by metal forming is provided, and two rings (16) that lie at a fixed distance with respect to each other in the axial direction are provided in this sleeve. In order to engage planets (3), the one ring (16) has the one groove profile (18), and the other ring (16) has the other groove profile (18).
Claims10
Nut of a planetary roller screw drive, comprising a sleeve having an inner periphery upon which multiple planets arranged distributed around the inner periphery can roll with their two ends on groove profiles of the nut, wherein one of the groove profiles for the one end of the planets and the other of the groove profiles for the other end of the planets are arranged at a fixed distance relative to each other in an axial direction, the sleeve is produced from sheet metal by a shaping process and two rings are arranged in the sleeve at a fixed distance relative to each other in the axial direction, one of the rings has the one groove profile and the other of the rings has the other groove profile.
Method for producing a nut comprising a sleeve having an inner periphery upon which multiple planets arranged distributed around the inner periphery can roll with their two ends on groove profiles of the nut, wherein one of the groove profiles for the one end of the planets and the other of the groove profiles for the other end of the planets are arranged at a fixed distance relative to each other in an axial direction, the sleeve is produced from sheet metal by a shaping process and two rings are arranged in the sleeve at a fixed distance relative to each other in the axial direction, one of the rings has the one groove profile and the other of the rings has the other groove profile, the method comprising the following steps:
- arranging and holding the rings in the sleeve at the fixed distance relative to each other, then forming beads in the sleeve and thus in grooves of the rings.
Dependencies are inferred from the claim text.