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US 2026/0063189 A1Published application
Nut and ball screw device
AssigneeNsk Ltd.
InventorsYuta NAKABAYASHI, Kazutaka TANAKA
Life of this patent
Estimating the term…
Abstract
A nut of the present disclosure includes a cylindrical nut main body penetrated by a screw shaft, a plurality of inner peripheral raceway surfaces and a plurality of S-shaped groove surfaces recessed to an outer side in a radial direction from an inner peripheral surface of the nut main body, and a flange protruding to the outer side in the radial direction from an outer peripheral surface of the nut main body. The flange includes at least one or more partial flanges extending only in a part of a circumferential direction along the outer peripheral surface of the nut main body.
Claims13
A nut comprising:
- a cylindrical nut main body penetrated by a screw shaft;
- a plurality of inner peripheral raceway surfaces and a plurality of S-shaped groove surfaces recessed to an outer side in a radial direction from an inner peripheral surface of the nut main body;
- and
- a flange that protrudes to the outer side in the radial direction from an outer peripheral surface of the nut main body,
- wherein
- the flange has at least one or more partial flanges extending only in a part of a circumferential direction along the outer peripheral surface of the nut main body,
- a space between one end and another end of the partial flange in the circumferential direction in a case where number of the partial flanges is one, and a space between the partial flanges adjacent to each other in the circumferential direction in a case where the number of the partial flanges is two or more is a relief space to which a thick portion of the nut main body is released, and
- one of the plurality of S-shaped groove surfaces is arranged on an inner side in the radial direction of the relief space.
5 more elements
Dependencies are inferred from the claim text.