Actuation system

The actuation system addresses the issue of rapid degradation in ball screw designs by implementing a recirculation path with a central and lateral segment configuration, improving load capacity and lifespan through reduced rolling body train length and guided recirculation.

FR3166676A1Pending Publication Date: 2026-03-27NTN EUROPE
3 Cites 0 Cited by

Patent Information

Application Number
FR2024010311
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-09-26
Publication Date
2026-03-27

AI Technical Summary

Technical Problem

Existing actuation systems with a ball screw design require a large number of rolling bodies, leading to breakages and rapid degradation due to the long train of rolling bodies, which compromises the load capacity and lifespan.

Method used

The actuation system features a recirculation path with a central portion and two lateral segments for rolling bodies, allowing separate recirculation and reducing the length of the rolling body train, while maintaining sufficient axial length for load capacity, using a central and lateral element with conduits and tunnels to guide the rolling bodies.

Benefits of technology

This design limits breakages and premature wear, enhancing the system's load capacity and lifespan by reducing the risk of rolling body train breakages and wear.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to an actuation system comprising a nut (1) and a screw (2) whose respective outer (4) and inner (5) peripheries are provided with threads (4a, 5a) forming a circulation path (7) for rolling bodies (6), one of the screw (2) and the nut (1) having a recirculation path (8) for the rolling bodies (6) to feed the path (7), the path (7) comprising a central portion (7c) disposed between two lateral portions (7a, 7b), the recirculation path (8) having two lateral sections (8a, 8b) extending respectively between a lateral portion (7a, 7b) and said central portion, arranged to allow the recirculation of the rolling bodies (6) separately from the central portion (7c) to one of the lateral portions (7a) for one of the sections (8a) and from the other lateral portion (7b) to said central portion for the other section (8b). Figure 1
Need to check novelty before this filing date? Find Prior Art