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Title:
ROLLING-BODY SCREW DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/155817
Kind Code:
A1
Abstract:
A rolling-body screw device 10 is provided with: a threaded shaft 11 having a rolling-body rolling groove 11a; a nut 21 having a loaded rolling-body rolling groove 21d; a return path 27 connecting one end and the other end of a loaded rolling-body rolling path located between the rolling-body rolling groove 11a and the loaded rolling-body rolling groove 21d; and a plurality of rolling bodies 13. The nut 21 is provided with: a nut body 21a in which the loaded rolling-body rolling groove 21d is formed; and a plurality of circulation parts 24 mounted respectively on the opposite end surfaces of the nut body 21a. The nut body 21a has, in each of the opposite end surfaces thereof, a circulation part mounting hole 25 greater than the outer shape of the circulation parts 24. Each of the circulation parts 24 is mounted in the circulation part mounting hole 25, is then rotated about the center position between a nut 21-side recess 27c and the protrusion 24a of the circulation part 24, and after that, is mounted on the nut body 21a by installing an affixation means 26.

Inventors:
SUZUKI Atsushi (2-12-10 Shibaura, Minato-k, Tokyo 06, 〒1088506, JP)
KAWAI Kotaro (2-12-10 Shibaura, Minato-k, Tokyo 06, 〒1088506, JP)
Application Number:
JP2019/000673
Publication Date:
August 15, 2019
Filing Date:
January 11, 2019
Export Citation:
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Assignee:
THK CO., LTD. (2-12-10 Shibaura, Minato-ku Tokyo, 06, 〒1088506, JP)
International Classes:
F16H25/22; F16H25/24
Domestic Patent References:
WO2003021133A12003-03-13
Foreign References:
JP2017180666A2017-10-05
JPH053715U1993-01-22
Attorney, Agent or Firm:
KAITA Hiroaki (801 Miyata Bldg, 1-38-2 Yoyogi, Shibuya-k, Tokyo 53, 〒1510053, JP)
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