Flexible Coupling Setting Tool for Anchor Rod Jamming
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Solution Overview
Problem
Existing setting tools for percussively driving anchor rods into boreholes often jam due to misalignment between the anchor rod and the borehole, especially when using automated mounting devices, leading to unreliable driving and removal of anchor rods.
Innovation Solution
A setting tool with a coupling element that allows for transverse displacement of the receiving element relative to the tool adapter, enabling adaptation of the guide direction to match the anchor rod direction, thus preventing jamming and facilitating easy removal of the tool from the anchor rod.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the setting tool uses a fixed rigid connection between the tool adapter and receiving element, then the structure is simple and stable, but the tool cannot adapt to angular or transverse offsets between the anchor rod and borehole, leading to jamming
Solution Approach 1:
The patent applies the dynamics principle by replacing the fixed rigid connection with a flexible coupling element that allows dynamic adaptation. The coupling element enables the receiving element to pivot and displace transversely relative to the tool adapter, allowing the guide direction to automatically adjust to match the anchor rod direction while maintaining a relatively simple overall structure.
2Manufacturing precision
If the setting tool uses a guided recess for the anchor rod, then the alignment is precise, but the tool cannot accommodate deviations from the target course, causing jamming during removal
Solution Approach 1:
The patent resolves this contradiction by making the receiving element dynamically adjustable through the flexible coupling. The recess maintains its guided alignment function while the entire receiving element can pivot and displace to accommodate borehole deviations, ensuring reliable operation even when the anchor rod direction deviates from the target course.
3Productivity
If the setting tool is designed for automated mounting device operation, then productivity is high, but any jamming leads to complete failure of the automated process
Solution Approach 1:
The patent enhances both productivity and reliability for automated operations by incorporating the flexible coupling element. This allows the setting tool to automatically adapt to variations in borehole alignment without requiring manual intervention, preventing jamming and ensuring continuous high-speed automated operation.
Solution Approach 2:
The patent applies the self-service principle by enabling the setting tool to automatically compensate for alignment deviations through the flexible coupling mechanism. The tool self-adjusts to match the anchor rod direction without external intervention, maintaining automated operation reliability and productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures reliable and efficient driving of anchor rods into boreholes, even when there are angular or transverse offsets, allowing for problem-free removal and enabling automated systems to handle multiple anchor rods without manual intervention, enhancing cost-effectiveness and operational simplicity.
Implementation Method 1
The displacement of the receiving element can take place, for example, by pivoting the receiving element relative to the tool adapter transversely to the tool direction
Implementation Method 2
The coupling element is designed and arranged such that it allows for a displacement relative to the tool adapter of at least part of the receiving element transversely to the tool direction
Implementation Method 3
an impact force, which is oriented in the tool direction and directed in the direction of the end facing away from the drive and introduced via the tool adapter, is transmitted to an anchor rod arranged in the recess of the receiving element
Data Source
AI summary
A setting tool used in a method for percussively driving an anchor rod into a borehole in a substrate has a drive-side end and, in an opposite tool direction, an end facing away from the drive. The setting tool has a tool adapter that forms the drive-side end and is arranged to interact with a driven impact tool. The end facing away from the drive is formed by a receiving element that has a recess arranged to receive part of an anchor rod. The tool adapter and the receiving element are coupled together by a coupling element such that an impact force introduced via the tool adapter is transmitted to an anchor rod arranged in the recess of the receiving element. The coupling element, in particular a coil spring, is arranged to allow for a displacement of at least part of the receiving element transversely to the tool direction.