Title:
BALL SCREW DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/210677
Kind Code:
A1
Abstract:
This ball screw device is provided with: a nut having a first track path; an outer circumferential screw shaft having a second track path and a third track path; a plurality of first balls disposed between the first track path and the second track path; an inner circumferential screw shaft having a fourth track path; a plurality of second balls disposed between the third track path and the fourth track path; a first stopper fixed closer to a first-direction end of the outer circumferential screw shaft; a second stopper fixed closer to a second-direction end of the inner circumferential screw shaft; and a third stopper fixed closer to a second-direction end of the outer circumferential screw shaft. The track of the first balls and the track of the second balls are both helical in the same direction. The first stopper has a first protrusion which protrudes in the second direction, the second stopper has a second protrusion which is brought into contact with the first protrusion, the nut has a regulating protrusion which protrudes in the second direction, and the third stopper has a third protrusion which is brought into contact with the regulating protrusion.
Inventors:
WATARAI YUUSUKE (JP)
IKEDA KYOHEI (JP)
SUZUKI YUTO (JP)
YABE TAKAYUKI (JP)
IKEDA KYOHEI (JP)
SUZUKI YUTO (JP)
YABE TAKAYUKI (JP)
Application Number:
PCT/JP2022/015349
Publication Date:
October 06, 2022
Filing Date:
March 29, 2022
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16H25/22; F16H25/24
Foreign References:
| JPH08159382A | 1996-06-21 | |||
| JPH04503562A | 1992-06-25 | |||
| JPH08159382A | 1996-06-21 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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