OPENTECHNICAL PUBLICATION
OT-2026-000000827

Roller screw bidirectional axial preloading structure

Published: 2026-09-15T19:03:27.359401Z
Permanent URL: https://opentechnical.org/p/OT-2026-000000827
Categories: Industrial Motion & Power Transmission > Rotary Motion

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ABSTRACT

A roller screw bidirectional axial preloading structure includes a screw, a
nut, and a plurality of first and second rollers arranged around the screw in
an interleaved manner and respectively having two ends connected to a first
and a second retainer. A first gap is formed between the first retainer and
one end of each first roller, and a second gap is formed between the second
retainer and the other end of each second roller, such that the first and the
second gaps are axially spaced while circumferentially interleaved around the
screw. Two elastic elements are located outside the first and second retainers
to apply two forces, which are transmitted via the first and second retainers
to the first and the second rollers to create two directionally opposite axial
preloads on the first and second rollers, giving the roller screw good
mechanical power transmission accuracy and stability in motion.

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OpenTechnical publication OT-2026-000000827
Published 2026-09-15T19:03:27.359401Z
https://opentechnical.org/p/OT-2026-000000827