High-precision expansion bolt

Abstract

The invention discloses a high-precision expansion bolt which comprises a screw rod, a nut, a sleeve, a trapezoidal block and a trapezoidal block concave part. The screw rod is matched with the nut, the sleeve is sleeved with the screw rod, and the trapezoidal block concave part is arranged on the screw rod; the trapezoidal block penetrates through the sleeve and matched with the trapezoidal blockconcave part. According to the high-precision expansion bolt, by arranging the trapezoidal block, the expansion bolt can be locked and fixed conveniently; the trapezoidal block concave part is arranged on the screw rod and matched with the trapezoidal block, and thus fixed-point force bearing can be achieved, the locking effect is good, part of the trapezoidal block can stretch deep into a forcebearing body, and falling of the expansion bolt is avoided; and meanwhile, the high-precision expansion bolt cannot be detached after being locked, and the safety is high due to permanent locking.

Description

technical field [0001] The invention relates to the technical field of expansion screws, and more specifically, to a high-precision expansion bolt. Background technique [0002] The traditional expansion bolt is to fix the expansion screw by tightening the nut and squeezing the deformation of the expansion tube. Since the expansion tube is usually relatively thin and easy to deform, the screw can be tightened after expansion, so it is easy to cause the expansion circle The uncertainty of tube deformation directly leads to the uncertainty of the fixing force of the expansion screw. At the same time, due to the better deformation of the expansion tube, the range of fixation is limited, and it is easy to be shaken or pulled out directly, resulting in the failure of the expansion screw to lock. Tight, in places with high safety factor requirements, such traditional expansion screws are likely to cause some safety accidents, but there are many problems in application that need to...

AI Technical Summary

Problems solved by technology

[0002] The traditional expansion bolt is to fix the expansion screw by tightening the nut and squeezing the deformation of the expansion tube. Since the expansion tube is usually relatively thin and easy to deform, the screw can be tightened after expansion, so it is easy to cause the expansion circle The uncertainty of tube deformation directly leads to the uncertainty of the fixing force of the expansion screw. At the same time, due to the better deformation of the expansion tube, the range of fixation is limited, and it is easy to be shaken or pulled out directly, resulting in the failure of the expansion screw to lock. Tight, in places with high safety factor requirements, such traditional expansion screws are likely to cause some safety accidents, but there are many problems in application that need to be solved urgently

Images