Title:
ROTARY BODY SHAFT, ROTARY BODY STRUCTURE, AND VEHICLE WHEEL
Document Type and Number:
WIPO Patent Application WO/2015/002289
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a rotary body shaft, a rotary body structure and a vehicle wheel in which sufficient torsional strength is ensured while keeping costs down. In the casting starting material state, the outer peripheral surface of this rotary body shaft (3) has multiple protrusions; this rotary body shaft (3) is inserted as an internal chill in the rotation center of the rotary body main body (2), and external torsional moment is transmitted to the rotary body main body (2). Further, the specific gravity of the material of the rotary body main body (2) is less than that of the material of the rotary body shaft (3), and multiple protrusions (5) are formed on the outer peripheral surface of the rotary body shaft (3) in the casting starting material state. The shape of the protrusions (5) has three portions from the outer periphery towards the inner periphery: the leading end portion has a dome shape, the middle portion has a constricted shape, and the base portion has a conical shape. For those of the protrusions (5) having a height of 0.3mm or greater from the outer peripheral surface of the rotary body shaft (3), the ratio of the total of the cross-sectional area enclosed by the equal-height contour line at the 0.3mm height position and the surface area of the outer peripheral surface of the rotary body shaft (3) is 5-50%.
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Inventors:
NOBE TAKAHIRO (JP)
KAMATA KOJI (JP)
TAKANO YUGO (JP)
KAMATA KOJI (JP)
TAKANO YUGO (JP)
Application Number:
PCT/JP2014/067883
Publication Date:
January 08, 2015
Filing Date:
July 04, 2014
Export Citation:
Assignee:
TPR CO LTD (JP)
TPR INDUSTRY CO LTD (JP)
TPR INDUSTRY CO LTD (JP)
International Classes:
F16D1/06; B22C9/28; B22D13/02; B22D19/00; F16C3/02
Foreign References:
| JP2003254318A | 2003-09-10 | |||
| JP2010078147A | 2010-04-08 | |||
| JPS593049U | 1984-01-10 | |||
| JPS57149370U | 1982-09-20 | |||
| JPS6419167U | 1989-01-31 | |||
| JPS6072906U | 1985-05-22 |
Attorney, Agent or Firm:
IAT WORLD PATENT LAW FIRM (JP)
Eye アット international patent business corporation (JP)
Eye アット international patent business corporation (JP)
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