Rotatable Dual-Output Power Tool for Accessory Switching
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Solution Overview
Problem
Handheld power tools with single output heads require frequent accessory changes, leading to cumbersome operations, complex structures, unsteady tool balance, and inefficient use due to shifted centers of gravity and distant locking switches, complicating single-handed operation.
Innovation Solution
A power tool with dual output units rotatable about a shift axis, a shift mechanism supported by mounting portions, and a clutch mechanism allowing single-handed operation, along with a battery pack that stabilizes the tool for balanced standing, optimizing center of gravity and reducing overall complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a power tool with double working heads is provided to meet different working conditions, then the adaptability is improved, but the device complexity and weight increase due to added working head and shifting structure
Solution Approach 1:
The patent implements a dual output unit design where the power tool body can accommodate two different working heads (e.g., drilling head and driving head) simultaneously. The output assembly includes a first output unit and a second output unit that can be independently selected and switched, allowing the same power tool to perform multiple functions without requiring separate tools for each task.
Solution Approach 2:
The patent employs a dynamic switching mechanism that allows the user to change between the first output unit and the second output unit during operation. The shifting structure enables quick transition between different working heads without requiring complete disassembly or complex removal procedures, making the system adaptable to changing work requirements in real-time.
2Adaptability or versatility
If a shifting structure for double working heads is added, then the adaptability is improved, but the weight and device complexity increase
Solution Approach 1:
The patent employs a dynamic switching mechanism that allows the user to change between the first output unit and the second output unit during operation. The shifting structure enables quick transition between different working heads without requiring complete disassembly or complex removal procedures, making the system adaptable to changing work requirements in real-time.
Solution Approach 2:
The patent combines the shifting mechanism and the dual output units into an integrated assembly that shares common structural elements. The output assembly includes mounting portions and shifting structures that serve multiple functions: supporting both output units, enabling rotation between them, and providing a compact configuration that minimizes overall weight compared to separate tools.
3Device complexity
If the locking switch is disposed far from the working head on the handle, then the device complexity is reduced, but the ease of operation deteriorates due to difficulty in single-handed operation
Solution Approach 1:
The patent repositions the locking switch from a distant location on the handle to a position adjacent to the output assembly. This spatial reconfiguration allows the user's thumb or finger to easily reach the locking switch while operating the tool, enabling single-handed operation. The switch is integrated into the output assembly structure, creating a compact control layout that maintains operational simplicity.
4Device complexity
If the center of gravity is not properly positioned, then the device complexity is reduced, but the stability deteriorates causing the tool to stand unsteadily
Solution Approach 1:
The patent employs an asymmetric internal structure arrangement where heavier components (such as the battery pack, motor, and output assembly) are strategically positioned to balance the overall center of gravity. The battery pack is mounted in a specific location on the power tool body, and the output assembly is configured with asymmetric mounting portions that contribute to achieving proper weight distribution and stable standing posture.
Data Source
AI summary
A power tool includes an output assembly and a battery pack. The output assembly is disposed at an end portion of a first handle, the output assembly includes at least two output units spaced apart and used for connecting working accessories, and the output assembly is rotatable about a shift axis to shift an output unit among the at least two output units to a working position or a non-working position. The battery pack is disposed at a bottom of a body, the battery pack includes a standing surface through which the power tool is capable of standing, and when the power tool stands, a projection of a center of gravity of the power tool on the standing surface is in the standing surface.