一般在墙上安装或固定设备,要用膨胀螺栓。最近,日内瓦技术发明展览会上展出了一种结构新颖的自锁螺栓(见图),它省掉了膨胀螺栓所必不可少的一个十字开口的套筒,而且,比膨胀螺栓的紧固力更大。从图上可以看到,在螺栓的无螺纹杆段,开有一个L形螺旋滑道槽,其深度是逐渐由深变浅的。滑道槽里还有一个L形滑块。它的 Mounting or fixing the equipment on the wall is usually done with expansion bolts. Recently, a technically innovative self-locking bolt (see figure) was exhibited at the Geneva Technological Invention Exhibition. It dispensed with a cross-opening sleeve that was indispensable for the expansion bolt, and was more secure than the expansion bolt. More powerful. As can be seen from the figure, in the threaded section of the bolt, there is an L-shaped spiral chute groove, the depth of which gradually decreases from deep to shallow. There is also an L-shaped slider in the chute groove. its