Variable-Bore Driver Socket to Protect Rock Bolt Nuts
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Solution Overview
Problem
Existing driver sockets cause damage and deterioration to the nut of rock bolts during installation, leading to replacement needs or operational difficulties, and compromise the readability of display information on the nut.
Innovation Solution
A driver socket design with a cylindrical tube featuring a through hole with varying diameters and a frustoconical transition between sections, distributing impact forces more evenly to reduce nut damage and maintain display face integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional driver socket with uniform diameter is used to hammer the rock bolt into the formation, then the driving force is sufficient, but the nut gets impacted or burred, or even deteriorated during installation
Solution Approach 1:
The driver socket features a through hole with varying cross-sectional areas along its axial length, creating different local zones: a first zone with larger cross-sectional area to distribute impact forces and protect the nut, and a second zone with smaller cross-sectional area to provide sufficient driving force. This local quality variation allows the same component to perform multiple functions - protecting the nut from damage while simultaneously delivering the necessary driving force for installation.
2Productivity
If high impact forces are applied during hammering, then the bolt is driven effectively into the formation, but the display face on the nut becomes damaged or unreadable
Solution Approach 1:
The driver socket's varying cross-sectional area design creates a protective first zone that distributes impact forces away from the nut's display face, preserving information readability while maintaining installation efficiency through the force-transmitting second zone.
Solution Approach 2:
The driver socket acts as an intermediary component between the hammering device and the nut. By incorporating a varying cross-sectional area, it mediates the transmission of impact forces, filtering out the harmful concentrated impacts that would damage the display face while allowing effective driving forces to be transmitted to advance the bolt into the formation.
3Device complexity
If a standard driver socket design is used, then the structure is simple, but the nut requires replacement after installation due to deterioration
Solution Approach 1:
The varying cross-sectional area configuration (first zone with larger area, second zone with smaller area) is a relatively simple geometric modification that significantly extends nut life and prevents deterioration, allowing the nut to be reused rather than replaced after installation.
Data Source
AI summary
A driver socket for installation of a ground reinforcement bolt is provided. The driver socket includes a cylindrical tube having a longitudinal axis, wherein a leading end of the driver socket is configured to be arranged in connection to the bolt and a trailing end of the driver socket is configured to be arranged in connection to a driving device. The driver socket includes a through hole having. The through hole has a varying cross-sectional area along its axial length. The through hole has comprising a first diameter in a mid-section thereof that is smaller than a second diameter in a leading section thereof. The through hole has a transition located between the mid-section and the leading section. The transition has a frustoconical shape. An installation system including a ground reinforcement bolt and the driver socket is also provided.