Shaft component and its fretting fatigue mitigation structure, design method and fretting fatigue strength test device
A fretting fatigue and shaft component technology, which is used in the testing of mechanical components, the testing of machine/structural components, and the use of repetitive force/pulse force to test the strength of materials, etc. Achieve the effect of preventing excess fatigue strength, improving fretting fatigue strength, and improving durability
Active Publication Date: 2021-10-26
HONDA MOTOR CO LTD
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] The so-called fretting is a phenomenon in which small relative sliding (several μm to tens of μm) accompanied by friction occurs repeatedly between the contact surfaces of mechanical parts on which surface pressure is applied. This fretting makes the surface of the parts fatigue. As a result, cracks are generated, and there is a problem that the fatigue strength of the parts is greatly reduced
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0049] Below, according to Figure 1 to Figure 12 Embodiments of the present invention will be described.
[0050] Such as figure 1As schematically shown in (A), an axle member 11 such as an axle of a conventional railway vehicle has: press-fit portions 12, 12 having a diameter D located at both ends of the shaft member 11; and non-press-fit portions 13 having a diameter d. Between the two press-fit parts 12, 12, the inner peripheral surface of the press-fit hole 14a at the center of another member 14 such as a wheel is fixed to the outer peripheral surface of each press-fit part 12 by press fitting. The outer peripheral surface of the press-fit portion 12 of the shaft member 11 press-fitted into the press-fit hole 14a of another member 14 undergoes fretting fatigue due to repeated input loads, forming a surface deterioration layer 12a prone to fine pitting. When the pitting of the surface deterioration layer 12a develops into cracks, the strength of the shaft member 11 is ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| width | aaaaa | aaaaa |
Login to View More
Abstract
The present invention provides a shaft component and its fretting fatigue reduction structure, design method and fretting fatigue strength test device, so as to reduce fretting fatigue generated in the press-fit part of the shaft component. The shaft member (11) has a non-press-fit part (13) with a diameter d and a press-fit part (12) with a diameter D larger than the diameter d, and the outer peripheral surface of the press-fit part (12) is pressed into a press-fit hole of another member (14) (14a) inner peripheral surface. A plurality of protrusions (12c) surrounded by a plurality of grooves (12b) are formed on the outer peripheral surface of the press-fit part (12). Prevented by the grooves (12b) from spreading as cracks, the durability of the shaft member (11) against fretting fatigue is improved.
Description
technical field [0001] The present invention relates to a fretting fatigue reduction structure of a shaft member, a shaft member to which the fatigue reduction structure is applied, a design method of the shaft member, and a fretting fatigue strength test device for testing the fretting fatigue strength of the shaft member, wherein The shaft member has a non-press-fit portion with a diameter d and a press-fit portion with a diameter D larger than the diameter d, and the outer peripheral surface of the press-fit portion is pressed into the inner peripheral surface of the press-fit hole of another member. Background technique [0002] The so-called fretting is a phenomenon in which small relative sliding (several μm to tens of μm) accompanied by friction occurs repeatedly between the contact surfaces of mechanical parts on which surface pressure is applied. This fretting makes the surface of the parts fatigue. As a result, cracks are generated, and there is a problem that the ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F16C3/02G01N3/32G01N3/20G01M7/00G01M13/00
CPCF16C3/02G01M7/00G01M13/00G01N3/20G01N3/32G01N2203/0023G01N2203/006G01N2203/0073G01N2203/0682
Inventor 矢崎徹
Owner HONDA MOTOR CO LTD