发明名称 |
COIL SPRING |
摘要 |
<p>A stress distribution state is improved and a better design is realized. A coil spring 1 has a spring wire 3 that is wound in a coil shape and whose sectional outer basic shape is circular. Between coil inner and outer diameter sections 5 and 7 of a sectional outer shape of the spring wire 3, flat faces 9 and 11 are formed so that coil portions adjacent to each other in the direction of a coil axis 4 are stabilized when they are brought into contact with each other. A flattening T/W of the sectional outer shape with the flat faces 9 and 11 in the coil axis direction is set so that a stress ratio is equal to or lower than a stress ratio of a coil spring whose sectional outer shape is circular. The flat faces 9 and 11 stably receive load and shorten a solid length in a tightly compressed state. This is advantageous in designing a spring having a longer stroke and lower rigidity. Better stress distribution in a circumferential direction of the sectional circumferential shape improves the uniformity of stress distribution.</p> |
申请公布号 |
EP2461066(A1) |
申请公布日期 |
2012.06.06 |
申请号 |
EP20100804031 |
申请日期 |
2010.04.26 |
申请人 |
NHK SPRING CO., LTD. |
发明人 |
KATO, NOBUHARU;YAMADA, HIROTAKA;KANO, JINETSU;YABUSHITA, TAKESHI |
分类号 |
F16F1/06;F16D13/64;F16F15/134 |
主分类号 |
F16F1/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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