Title:
BALL SCREW
Document Type and Number:
WIPO Patent Application WO/2024/057993
Kind Code:
A1
Abstract:
This ball screw has: a screw shaft having an outer circumferential screw groove formed therein; a nut having an inner circumferential screw groove formed therein; a plurality of balls accommodated in a rolling route formed by the outer circumferential screw groove and the inner circumferential screw groove facing each other; and a return tube which returns the balls from one end to the other end of the rolling route, wherein the return tube has a tongue which protrudes toward the rolling route and scoops the balls from the rolling route, and the tongue has a shape having a width gradually reduced from a root of the tongue toward the leading end thereof.
Inventors:
OKA KEITARO (JP)
Application Number:
PCT/JP2023/032294
Publication Date:
March 21, 2024
Filing Date:
September 04, 2023
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16H25/22
Foreign References:
| JP2011122688A | 2011-06-23 | |||
| JP2011094730A | 2011-05-12 | |||
| JP2012112432A | 2012-06-14 | |||
| JP2015224660A | 2015-12-14 | |||
| JP2004108454A | 2004-04-08 | |||
| JPH0298245U | 1990-08-06 |
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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