| 摘要 |
PURPOSE: A link structure is provided to prevent the damage of inner components and a tool by separating an operating pin from a second link when an overload is generated. CONSTITUTION: A forward rod is separated to a first link(10) and a second link(20). An operating pin(40) and a spring(50) are installed in the first link and the second link A key(70) to decide the pressure of the spring is installed in the first link. The operating pin is installed in the first link to separate the first link and the second link. Thereby, the damage of inner components is prevented at an overload.
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