Title:
SHAFT UNIT, MANUFACTURING METHOD THEREFOR, AND ELECTRIC ASSIST DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/075695
Kind Code:
A1
Abstract:
Provided are a shaft unit capable of suppressing deformation of a center hole due to the formation of a caulked portion, a method for manufacturing the shaft unit, and an electric assist device equipped with the shaft unit. A shaft unit 56 has a shaft member 12 that has a coupling shaft portion 39 at one end in the axial direction and has a center hole 43a opened at one end surface of the coupling shaft portion 39 in the axial direction, and a joint member 25, which has a center hole 30 penetrating radially inward in the axial direction and in which the coupling shaft portion 39 is fitted into the center hole 30, wherein the coupling shaft portion 39 has a caulked portion 41 that is formed by plastically deforming only the radially outer part of the edge portion of the coupling shaft portion on one side in the axial direction, the caulked portion 41 being in surface contact with an opening peripheral edge 77 of the center hole 30 of the joint member 25 on one side in the axial direction.
Inventors:
OSAWA RYO (JP)
UNNO KENTARO (JP)
KOZU YUKI (JP)
ISHII TORU (JP)
UNNO KENTARO (JP)
KOZU YUKI (JP)
ISHII TORU (JP)
Application Number:
PCT/JP2023/035926
Publication Date:
April 11, 2024
Filing Date:
October 02, 2023
Export Citation:
Assignee:
NSK STEERING & CONTROL INC (JP)
International Classes:
F16D1/072; B21D39/00; B62D5/04; F16D3/04; F16H1/16
Foreign References:
| JP2007040420A | 2007-02-15 | |||
| JPH1137168A | 1999-02-09 | |||
| JP2006250294A | 2006-09-21 | |||
| JP2007303685A | 2007-11-22 | |||
| JP2011250485A | 2011-12-08 |
Attorney, Agent or Firm:
KIWA INTERNATIONAL (JP)
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