Automatic folding drill device and method for two-point composite tunnel peripheral hole overbreak control

The automatic drilling device with two-point composite over-excavation control for tunnel perimeter holes utilizes a tracked chassis and multi-axis robotic arm to achieve multi-point guidance and angle adjustment of the drill rod, solving the problem of insufficient drilling angle control precision in existing devices and improving construction efficiency and quality.

CN122407221APending Publication Date: 2026-07-17CHINA GEZHOUBA GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA GEZHOUBA GROUP CO LTD
Filing Date
2026-03-20
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing peripheral hole drilling equipment suffers from insufficient precision in controlling drilling angles and poor flexibility in adjusting drill rod posture, making it difficult to meet the high-precision construction requirements under complex geological conditions. This leads to frequent over- and under-excavation phenomena, affecting construction efficiency and costs.

Method used

The automatic drilling device for over-excavation control of tunnel perimeter holes adopts a two-point composite design. Through components such as a tracked chassis, rotating base, multi-axis robotic arm, and hydraulic rod, it achieves multi-point coordinated guidance and angle adjustment of the drill rod. Combined with hydraulic drive and steel cable linkage, it provides power support to achieve precise adaptation and stability of the drilling.

Benefits of technology

It improved drilling accuracy and efficiency, reduced manual labor intensity, reduced equipment wear and tear, reduced the amount of support materials used, and improved construction quality and economic benefits.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a two-point composite tunnel peripheral hole overbreak control automatic drill folding device and method, which comprises a head limiting adjustment mechanism, a middle limiting adjustment mechanism, a U-shaped track beam, a middle drill supporting mechanism, a drill rod, a pushing mechanism, a multi-shaft mechanical arm, a rotating base, a tracked walking chassis and a rotating adjustment mechanism; the rotating base, the multi-shaft mechanical arm, the rotating adjustment mechanism and the U-shaped track beam are sequentially fixed on the top of the tracked walking chassis; the head limiting adjustment mechanism is fixed on the front end of the U-shaped track beam; the middle limiting adjustment mechanism, the middle drill supporting mechanism and the pushing mechanism are slidably connected to the head limiting adjustment mechanism; one end of the drill rod is arranged at the front end of the pushing mechanism; the other end of the drill rod sequentially passes through the middle drill supporting mechanism, the middle limiting adjustment mechanism and the head limiting adjustment mechanism. The height of the drill rod is vertically adjusted by the middle limiting adjustment mechanism and the head limiting adjustment mechanism, and the drill rod is fixed and limited by the middle drill supporting mechanism, so that a three-point cooperative guiding structure is formed to adjust the posture of the drill rod, the drill rod is bent controllably, and the angle of the drill rod is adjusted.
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