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    • 1. 发明申请
    • Structure of internal thread portion for preventing looseness and method of producing the same
    • 用于防止松动的内螺纹部分的结构及其制造方法
    • US20020009348A1
    • 2002-01-24
    • US09963579
    • 2001-09-27
    • Sugiura Seisakusho Co., Ltd.
    • Naoyuki FujiiKeiji Nomura
    • F16B039/22
    • F16B39/282F16B39/22
    • It is an object of the invention to provide a structure of an internal thread portion for preventing looseness which structure allows a reduction in the torque required for the threaded engagement with an external-thread member and prevents a seizure. An exit end portion of a self-locking nut is taperingly contracted over the entire circumference thereof so as to form a contracted internal thread portion having a conical section. In addition, ridges of the contracted internal thread portion are provided with corrugation continuing circumferentially. The diameter of an inscribed circle which links the extremities of projections in the corrugation is smaller than the minor diameter of the external-thread member which is to be engaged threadedly with the internal thread portion. With the external-thread member threadedly engaged with the internal thread portion, a plurality of projections press the root or flanks of the external-thread member and are thereby elastically compressed by the reaction, so as to clamp the external-thread member from outside. In accordance with this arrangement, the tightening torque can be reduced and a seizure is prevented.
    • 本发明的目的是提供一种用于防止松动的内螺纹部分的结构,该结构允许减小与外螺纹构件螺纹接合所需的扭矩并防止咬住。 自锁螺母的出口端部在其整个圆周上逐渐收缩,从而形成具有锥形部分的收缩内螺纹部分。 此外,收缩的内螺纹部分的脊部具有沿周向延续的波纹。 在波纹中连接凸起的末端的内接圆的直径小于将与内螺纹部分螺纹连接的外螺纹构件的小直径。 在外螺纹部件与内螺纹部螺纹接合的情况下,多个突起挤压外螺纹部件的根部或侧面,从而通过反作用力弹性地压缩,从而将外螺纹部件从外部夹紧。 根据该结构,能够减小紧固扭矩,防止卡滞。