Can the expansion screw withstand multiple?

Expansion screws are generally referred to as metal expansion screws. The expansion screws are fixed by the wedge-shaped inclination to promote the expansion of the frictional gripping force to achieve a fixed effect. The screw has a thread at one end and a taper at the end. The outer bread is a tin (some steel pipes), the iron cylinder (steel pipe) has a few cuts in half, and they are stuffed together into the hole in the wall, then the nut is locked, the nut is pulled outward, and the taper is pulled into the iron cylinder. The iron cylinder is opened, so it is tightly fixed on the wall, and is generally used for fastening the fence, awning, air conditioner and the like on cement, brick and the like. However, its fixing is not very reliable. If the load has a large vibration, looseness may occur, so it is not recommended to install a ceiling fan.

The expansion screw is composed of a screw and an expansion tube, and the tail of the screw is conical, and the inner diameter of the cone is larger than the inner diameter of the expansion tube. When the nut is tightened, the screw moves outward, and the conical portion is moved by the axial movement of the thread, thereby forming a large positive pressure on the outer circumferential surface of the expansion tube, and the angle of the cone is small, thereby making the wall and the expansion tube Friction self-locking is formed between the cones and the fixing effect is achieved.

The spring pad on the expansion screw is a standard part. Because its opening is staggered and elastic, it is called a spring washer. The function of the spring washer is to pierce the nut and the pad with the sharp sharp corner of the wrong mouth to prevent the nut from loosening.

The flat pad is also a standard part, and its function is to evenly distribute the pressure of the nut on the connected parts. Taihao Warehouse Haojing Technology Co., Ltd. is located in No. 188, Luxin Road, Taicang City. It is a professional manufacturer of expansion screws.