Nut anti-loosening sleeve

The invention relates to a nut anti-loosening sleeve. The anti-loose sleeve body is provided with a cavity of an inner hexagonal structure, the top of the anti-loose sleeve body is open, the nut can be placed in the cavity from the top, and the nut and the anti-loose sleeve body cannot rotate relatively; and a plurality of protruding teeth pointing to the axis are arranged at the bottom of the cavity of the anti-loose sleeve body, and the protruding teeth are the same in structural size. The nut anti-loosening sleeve is simple in structure, low in cost, convenient to use and capable of achieving quick anti-loose connection. 本发明涉及一种螺母防松套。防松套体有内六方结构的空腔，防松套体的顶部开放，螺母可从顶部可放入空腔内，螺母与防松套体不能相对转动；防松套体空腔的底部有多个指向轴心的凸牙，各凸牙的结构尺寸相同。它结构简单，成本低，使用方便，可以实现快速防松连接。