Bolt equipped with pilot
    1.
    发明授权
    Bolt equipped with pilot 失效
    螺栓配有飞行员

    公开(公告)号:US6077013A

    公开(公告)日:2000-06-20

    申请号:US981480

    申请日:1998-03-09

    IPC分类号: F16B35/04 F16B25/00

    CPC分类号: F16B35/047 F16B35/041

    摘要: A bolt provided with a pilot of the present invention is formed with a pilot portion, on the front end side of a shank portion, having an axis aligning with an axis of the shank portion. The pilot portion is formed with a guide thread portion continuous to the normal thread portion to about half portion of the pilot portion. The connecting portion between the normal thread portion and the guide thread portion has a connection thread portion having an outer diameter gradually reducing from the normal thread portion toward the front end portion of the pilot portion. According to such structure, workability can be improved.

    摘要翻译: PCT No.PCT / JP97 / 01461 Sec。 371日期1998年3月9日 102(e)1998年3月9日PCT 1997年4月25日PCT PCT。 公开号WO97 / 41360 PCT 日本1997年11月6日具有本发明的导向件的螺栓形成有在柄部的前端侧具有与轴柄部的轴线对准的轴线的先导部。 导向部分形成有与正常螺纹部分连续的引导螺纹部分到引导部分的大约一半部分。 正常螺纹部与导丝螺纹部之间的连接部具有从正常螺纹部向导向部的前端部逐渐减小的外径的连接螺纹部。 根据这样的结构,可以提高可加工性。