Handheld Power Tool Chuck Switching and Torque Control
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Solution Overview
Problem
Existing handheld power tools with dual working chucks face challenges in weight distribution, torque management, and convenient operation due to complex mechanical structures, leading to operator fatigue and unsafe handling, especially during tasks like high-altitude work.
Innovation Solution
A handheld power tool design featuring a housing with a handle-based gravity center, a control mechanism that allows easy switching between working chucks, and an electronic torque control system for precise torque adjustment, enabling efficient operation and reduced operator strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a tri-jaw type metal working chuck is used to clamp the drill bit, then the working chuck can effectively clamp different types of work heads, but the working chuck becomes complex in structure and large in weight
Solution Approach 1:
The patent uses a simplified chuck structure that copies only the essential clamping function without the complex tri-jaw mechanism. The working chuck is designed with a simple clamping structure that can still effectively hold different work heads, eliminating the need for a heavy multi-jaw system while maintaining adaptability.
Solution Approach 2:
The patent extracts the core clamping function from the complex tri-jaw chuck structure, removing unnecessary components while retaining the ability to securely hold various work heads. This extraction reduces the overall weight and complexity of the working chuck.
2Adaptability or versatility
If mechanical control mechanisms for torque adjustment are added to the output end, then torque can be adjusted during bolt screwing, but the gravity center deviates from the handle and causes wrist torque and operator fatigue
Solution Approach 1:
The patent replaces the mechanical torque adjustment mechanism at the output end with an electronic control system. The torque is adjusted through electronic control of the motor, eliminating the need for mechanical components at the output end that would shift the gravity center and cause operator fatigue.
Solution Approach 2:
The patent introduces an electronic control system as an intermediary between the motor and the working chuck, allowing torque adjustment without mechanical components at the output end. This intermediary control mechanism maintains balance while providing the required torque adjustment capability.
3Adaptability or versatility
If manual operation is required to remove locking and convert working chuck position, then the working chuck can be converted between positions, but the operator must frequently change hands making operation inconvenient and unsafe
Solution Approach 1:
The patent implements an automatic position conversion mechanism where the working chuck can switch between positions automatically without manual intervention. The system self-manages the locking and unlocking processes, eliminating the need for the operator to use their other hand to manipulate controls during operation.
Solution Approach 2:
The patent replaces manual mechanical operation for position conversion with an electronic control system. The working chuck position is changed through electronic signals that automatically control the locking and unlocking mechanisms, allowing the operator to maintain a secure grip on the handle.
Data Source
AI summary
The present invention provides a handheld power tool and an operation method thereof. The handheld power tool comprises a housing, a handle, a switch, a motor, an output shaft and a working component; the working component comprises at least two working chucks; the at least two working chucks respectively comprise a working shaft, the handheld power tool further comprises a control mechanism locking the working component relative to the position of the housing, the control mechanism comprises a control part adjacent to the switch and movably disposed relative to the housing, and the control part operably removes the position locking of the working component and controls the output shaft to be dis-matched and disconnected with one of the working shafts; and the position conversion of the working chucks can be finished by means of other body parts of an operator through one hand, and the operation is convenient and reliable.