Integrated Gear Case Housing for Compact Impact Power Tools
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Solution Overview
Problem
Existing power tools with gear assemblies and impact mechanisms often require separate gear cases, which add weight, complexity, and increase the number of parts, making them less compact and efficient.
Innovation Solution
The power tool integrates a gear assembly and impact mechanism within a housing defined by clamshell halves, eliminating the need for a separate gear case by using polymer-made clamshell halves that support the motor, gear assembly, and impact mechanism, with a sealed chamber and integrated anvil support, and incorporating a compact end cap design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a separate gear case is used to enclose and support the gear assembly and impact mechanism, then the structural integrity and support function are improved, but the device complexity and number of parts increase
Solution Approach 1:
The patent combines the gear case function with the main housing (clamshell halves) into a single integrated structure. The housing directly supports the motor, gear assembly, and impact mechanism without requiring a separate gear case, thereby reducing the number of parts while maintaining structural integrity through the unified housing design
2Reliability
If a separate gear case is used to enclose the gear assembly and impact mechanism, then the protection and enclosure function are improved, but the weight of the power tool increases
Solution Approach 1:
The housing is designed to perform both the protective enclosure function and the gear case support function simultaneously. By integrating these functions into the existing housing structure rather than adding a separate gear case, the patent reduces the total weight of the power tool while maintaining adequate protection for internal components
3Strength
If a separate gear case is used to support the gear assembly and impact mechanism, then the support function is improved, but the compactness of the power tool deteriorates
Solution Approach 1:
The housing is configured to directly support the gear assembly and impact mechanism in its integrated structure. This eliminates the need for an additional separate gear case that would increase the overall volume, thereby maintaining a more compact power tool design while providing adequate support for all internal components
Data Source
AI summary
A power tool may include a housing including first and second clamshell halves. The power tool may include a motor directly supported by the first and second clamshell halves. The power tool may include a gear assembly directly supported by the first and second clamshell halves and operably coupled to the motor. The power tool may include an impact mechanism disposed within the housing between the first and second clamshell halves and operably coupled to the gear assembly, the impact mechanism including a camshaft, an anvil rotationally supported by an anvil support for rotation about an axis, the anvil support being directly supported by the first and second clamshell halves, and a hammer configured to reciprocate along the camshaft and to impart rotational impacts to the anvil in response to rotation of the camshaft.