Kugelgewindetrieb

Details

Veröffentlichungs-Nr.

EP4810826

Anmeldetag

29. Juli 2025

Veröffentlichung

5. März 2026

Rechtsraum

EP

IPC

F16H25/22, F16H25/24

Abstract

Provided is a ball screw device capable of holding a sufficient amount of lubricant in a circulation groove. This ball screw device includes: a screw shaft having a shaft-side spiral groove in an outer peripheral surface thereof; a nut 3 having, on an inner peripheral surface thereof, a nut-side spiral groove 7 and a roughly S-shaped circulation groove 9 connecting an end point and a start point of a spiral-shaped load path 8 configured by the shaft-side spiral groove 5 and nut-side spiral groove 7; and a plurality of balls 4 arranged on an inner side of the load path 8 and the circulation groove 9. The circulation groove 9 has, in a surface thereof, a recessed lubricant holding portion 11 for holding the lubricant.

Anmelder

Firma

NSK Ltd.

Land

🇯🇵 Japan

Fachgebiete