Anti-loosening rapid expansion bolt

Abstract

The invention relates to an anti-loosening rapid expansion bolt which comprises a bolt inner core, a nut, a wave-shaped gasket, a conical lantern ring, a bolt outer ring and an eccentric wheel mechanism. The eccentric wheel mechanism is composed of a rectangular notch, a U-shaped clamping groove and an eccentric wheel. By pulling the bolt inner core, the inner core moves outwards, so that the eccentric wheel expands outwards under the action of the U-shaped clamping groove in the upper part of the inner core, and the larger the downward movement of the inner core is, the larger the outward expansion of the eccentric wheel is. When the anti-loosening rapid expansion bolt expands just enough to fit a wall, the nut is continuously screwed slightly so as to achieve continuous locking, so thatthe expansion installation of the bolt can be completed; two shifting pieces are arranged in the middle of the bolt outer ring and face outwards, and when the bolt inner core moves outwards, the one-way shifting pieces fluctuate, so that the effect that the inner core can only exit and cannot enter is achieved, and the one-way stability of expansion of the eccentric wheel is guaranteed; and underthe dynamic expansion action of the eccentric wheel of the novel expansion bolt, the friction force is a dynamic value, so that the bolt is tighter when being pulled, and the disengagement caused by aging and enlarging of a wall surface hole is avoided.

Description

technical field [0001] The invention relates to the technical field of expansion bolts and fasteners, in particular to an anti-loosening rapid expansion bolt. Background technique [0002] The expansion bolt is a commonly used installation part in engineering. After the expansion bolt is driven into the hole on the ground or wall, the workpiece to be fixed is set on the screw, and then the nut is screwed onto the screw, and the expansion bolt is tightened with a wrench. Nuts and bolts go out, but the outer metal sleeve does not move, so the big head under the bolt expands the metal sleeve to make it fill the entire hole. At this time, the expansion bolt cannot be pulled out, and the workpiece is also fixed. In the expansion bolt; [0003] For example, the Chinese invention patent No. 2017107316649 discloses an expansion bolt, which includes a screw rod, a circular expansion tube, a flat washer, a spring washer and a nut. The front part of the screw rod has external threads ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is very obvious. When the outer ring expands, it needs a very large nut rotation pulling force, which is inconvenient when working at heights. This is very time-consuming and laborious. Moreover, the expanded diameter of the outer ring remains rigid after plastic deformation. When the wall surface ages, the wall drilling becomes larger, and the expansion bolts will loosen and fall off.

Aging air conditioners fall from the outer walls of high-rise buildings, which is very dangerous

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