Title:
SHAFT MEMBER FITTING STRUCTURE, DESIGN METHOD THEREFORE AND FRETTING FATIGUE TEST METHOD
Document Type and Number:
Japanese Patent JP2022143695
Kind Code:
A
Abstract:
To provide a fitting structure which can enhance the fretting fatigue strength of a shaft member, and a design method which can arbitrarily set a point at which the break of the shaft member occurs.SOLUTION: As a fitting structure of a shaft member 2 to a fitting hole 1a of a contact member 1, a stress relief groove 2A in which a stress concentration coefficient Kt reaches 1.08 to 1.13 is formed at a point corresponding to an end part of the contact member 1 of the shaft member 2 in an axial direction. Also, when the shaft member 2 receives a torsional load, the stress concentration coefficient Kt is set smaller than 1.08 in order to fretting-fatigue breaking the shaft member 2 at a fitting portion, the stress concentration coefficient Kt is set larger than 1.13 in order to fatigue-break the shaft member 2 at the stress relief groove 2A portion, and the stress concentration coefficient Kt is set to 1.08 to 1.13 in order to make the fretting-fatigue break at the fitting portion of the shaft member 2 and the fatigue break at the stress relief groove 2A portion substantially simultaneously occur.SELECTED DRAWING: Figure 10
Inventors:
YAGASAKI TORU
NOMURA KYOSUKE
ISHII HITOSHI
NOMURA KYOSUKE
ISHII HITOSHI
Application Number:
JP2021044352A
Publication Date:
October 03, 2022
Filing Date:
March 18, 2021
Export Citation:
Assignee:
HONDA MOTOR CO LTD
International Classes:
F16B7/20; F16B4/00; G01N3/04; G01N3/34
Attorney, Agent or Firm:
Ryohei Kaizuka
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