Dual-Function Handheld Auger for High-Torque Ground and Ice Drilling
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Solution Overview
Problem
Existing handheld digging tools lack the versatility and efficiency to effectively drill through both ground and ice, with limited torque and adaptability, posing challenges in various environmental conditions.
Innovation Solution
A handheld digging tool equipped with a brushless DC motor and a battery pack providing a nominal voltage of 40-80 V, capable of delivering a maximum output torque of at least 80 N·m, featuring a dual-function drill rod mechanism for ground and ice drilling, along with a control mechanism that limits torque output and detects load and position parameters to prevent recoil and ensure safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the torque output is increased to drill through hard ground and ice, then the drilling capability is improved, but the device weight increases
Solution Approach 1:
The patent applies parameter changes by selecting a brushless DC motor with specific voltage (40-80V) and torque (≥80 N·m) parameters that achieve the required drilling capability while optimizing the weight-torque ratio. The motor parameters are carefully chosen to provide sufficient torque for hard ground and ice drilling without excessive weight gain.
Solution Approach 2:
The patent implements universality by designing a dual-purpose drill rod mechanism that can function as both a ground drill rod and an ice drill rod. This allows a single device to handle multiple drilling scenarios (ground and ice) without requiring separate specialized equipment, thereby avoiding the weight penalty of carrying multiple tools while maintaining high torque capability for both applications.
2Adaptability or versatility
If the drill rod mechanism is made adaptable for both ground and ice drilling, then the versatility is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a ground drill rod and ice drill rod with compatible interfaces and mounting mechanisms that allow them to be interchangeably installed on the same drilling device. The drill rods share common structural features and connection points, enabling a single device to perform both ground and ice drilling functions without requiring complex switching mechanisms or multiple specialized devices.
3Productivity
If the torque output is increased for efficient drilling, then the productivity is improved, but the risk of recoil and safety hazards increases
Solution Approach 1:
The patent implements feedback by incorporating a control mechanism that includes sensors and control circuits to detect load parameters and position during drilling operations. The control mechanism continuously monitors the drilling process and provides feedback signals to the brushless DC motor control system, enabling real-time adjustment of motor output to prevent excessive torque that could cause recoil or safety hazards while maintaining high drilling efficiency.
Solution Approach 2:
The patent applies preliminary anti-action by designing a control mechanism that proactively limits torque output under certain conditions before harmful recoil or safety issues can occur. The control mechanism pre-establishes safety thresholds and automatically restricts motor power output when approaching dangerous operating conditions, preventing rather than merely responding to harmful effects.
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
The tool achieves high torque output per unit weight, enabling efficient drilling in both ground and ice, while the control mechanism enhances safety by limiting torque and preventing accidental rotation, thus addressing the adaptability and safety issues of existing tools.
Implementation Method 1
a drive mechanism including a brushless DC motor; and a battery pack for supplying power to the brushless DC motor, where the nominal voltage of the battery pack is 40 V to 80 V, and the maximum output torque of the handheld digging tool is greater than or equal to 80 N·m
Data Source
AI summary
A handheld digging tool includes a main body and a first drill rod mechanism with a first function. The main body is configured to be adapted for at least a second drill rod mechanism with a second function. The main body includes: a support mechanism; a drive mechanism supported by the support mechanism, including a direct current motor, and configured to be selectively connected to one of the first drill rod mechanism and the second drill rod mechanism to drive the first drill rod mechanism or the second drill rod mechanism to work; and a battery pack for supplying power to the direct current motor, where the nominal voltage of the battery pack is less than or equal to 80 V, and the maximum output torque of the handheld digging tool is greater than or equal to 80 N·m.