Hydraulic anti-loosening bolt and hydraulic anti-loosening bolt and nut fastening device

The invention discloses a hydraulic anti-loosening bolt and a hydraulic anti-loosening bolt and nut fastening device. A hydraulic anti-loosening column system is arranged in a nut of the bolt, an adjustable pin shaft is arranged on the hydraulic anti-loosening column system, and the purpose that an anti-loosening mechanism of the bolt fixes the bolt to prevent loosening of the bolt is achieved bycontrolling the pin shaft to pop up and contract. The nut and the hydraulic anti-loosening column system are controlled simultaneously through a specially-designed tightening device, and then loosening and tightening action of the bolt is achieved. The hydraulic anti-loosening bolt and nut fastening device is simple in structure, easy to operate, good in anti-loosening effect and capable of beingreused. 本发明公开了一种液压式防松动螺栓及液压式防松动螺栓、螺母紧固装置，通过在螺栓的螺帽中设置液压防松柱系统，液压防松柱系统上设置有可调节的销轴，通过控制销轴的弹出与收缩，从而实现螺栓的防松动机构对螺栓进行固定防松动的目的。再通过特殊设计的拧紧装置同时操控螺帽和液压防松柱系统，进而实现螺栓的松紧动作。本发明所述的液压式防松动螺栓、螺母紧固装置结构简单，易操作，防松动效果好，且能够重复使用。