Title:
LEAF SPRING DEVICE HAVING EYE, LEAF SPRING DEVICE MANUFACTURING METHOD, AND SHOT PEENING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2011/077985
Kind Code:
A1
Abstract:
A leaf spring device (10) is provided with a leaf spring (11) comprising an eye (12) at each end thereof, and a bushing (20) press-fitted into the eye (12). The inner surface (30) of the eye (12) is cut with a tool such as a reamer and is shot-peened. A compressive residual stress distribution, due to shot peening, on the inner surface (30) of the eye is such that the absolute value of a compressive residual stress (τ1) in a first region (S1), including a winding start portion (31), of the eye (12) and the absolute value of a compressive residual stress (τ2) in a second region (S2), including a winding intermediate portion (32), of the eye (12) are larger than the absolute values of compressive residual stresses (τ3) in other regions (S3) of the inner surface (30) of the eye.
Inventors:
TANGE, Akira (())
丹下 彰 (())
KURIMOTO, Kiyoshi (())
栗本 清 (())
GOTO, Yurika (())
丹下 彰 (())
KURIMOTO, Kiyoshi (())
栗本 清 (())
GOTO, Yurika (())
Application Number:
JP2010/072357
Publication Date:
June 30, 2011
Filing Date:
December 13, 2010
Export Citation:
Assignee:
NHK SPRING CO., LTD. (3-10, Fukuura Kanazawa-ku, Yokohama-sh, Kanagawa 04, 〒2360004, JP)
日本発條株式会社 (〒04 神奈川県横浜市金沢区福浦３丁目１０番地 Kanagawa, 〒2360004, JP)
SUMIHATSU CO., LTD. (3-5-5, Iwamotocho Chiyoda-k, Tokyo 32, 〒1010032, JP)
株式会社スミハツ (〒32 東京都千代田区岩本町３丁目５番５号 Tokyo, 〒1010032, JP)
TANGE, Akira (())
丹下 彰 (())
KURIMOTO, Kiyoshi (())
日本発條株式会社 (〒04 神奈川県横浜市金沢区福浦３丁目１０番地 Kanagawa, 〒2360004, JP)
SUMIHATSU CO., LTD. (3-5-5, Iwamotocho Chiyoda-k, Tokyo 32, 〒1010032, JP)
株式会社スミハツ (〒32 東京都千代田区岩本町３丁目５番５号 Tokyo, 〒1010032, JP)
TANGE, Akira (())
丹下 彰 (())
KURIMOTO, Kiyoshi (())
International Classes:
B24C1/10; F16F1/02; F16F1/18
Attorney, Agent or Firm:
KURATA, Masatoshi et al. (1-12-9 Toranomon, Minato-k, Tokyo 01, 〒1050001, JP)
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