Non-hammering type underreaming drill

Abstract

The invention relates to the technical field of reaming equipment, and provides a non-hammering type underreaming drill. The non-hammering type underreaming drill comprises a drill handle and a drill bit and further comprises an underreaming assembly, and the drill bit is arranged on the drill handle through the underreaming assembly. The underreaming assembly comprises a tool rest top block, wherein the tool rest top block is provided with two oppositely-arranged inclined faces, and the drill bit is arranged at the end of the tool rest top block; a tool rest cover, wherein the tool rest cover is arranged at the other end of the tool rest top block, a through hole is formed in the tool rest cover, and the inclined faces face the through hole; two underreaming cutters, wherein the two underreaming cutters are symmetrically arranged, and the underreaming cutters are located on the inclined faces and can be unfolded to expand the diameter of a hole; and an adjusting assembly, wherein the adjusting assembly is arranged between the drill handle and each underreaming cutter and used for controlling the underreaming cutters to stretch out or retract. According to the technical scheme, the problem that the expansion resistance of a head of an anchor bolt is large due to the fact that the diameter of the bottom end of the hole is smaller than or equal to that of an inlet in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of hole reaming equipment, in particular to a non-hammer bottom reaming drill. Background technique [0002] Post-anchoring technology has been widely used in high-load installations such as roads, railways, bridges, steel structures, and heavy machinery. The installation process is as follows: First, drill a straight hole on the concrete base material, and then use a special reaming drill bit to ream the hole at the bottom of the straight hole. After the head of the hole anchor bolt expands, it closely cooperates with the concrete cavity to form a mechanical locking mechanism. Since the head of the anchor bolt needs to be expanded, but the diameter of the hole after drilling is the same or the upper part is larger and the lower part is smaller. In order to ensure that the anchor bolt can expand smoothly and play a fixed role after penetrating the hole, therefore, A hole reaming device is needed to expand ...

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a non-hammer bottom reaming drill, which solves the problem of large expansion resistance of the anchor bolt head caused by the diameter of the hole bottom being less than or equal to the diameter of the entrance in the related art

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