Power Tool Housing Coupling Mechanism Design
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Solution Overview
Problem
Existing rotary impact tools face challenges in efficiently coupling the motor housing and handle housing portions together, which affects the tool's compactness and operational efficiency.
Innovation Solution
The power tool incorporates a housing design with a screw boss that defines a bore to receive a fastener for coupling the first and second housing portions together, along with a motor and gear assembly that includes an impact mechanism to provide rotational impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a screw boss with bore is used to couple housing portions, then the coupling strength and structural integrity are improved, but the device complexity increases
Solution Approach 1:
The housing is divided into multiple portions (motor housing and handle housing) that are coupled together using the screw boss mechanism, allowing for modular assembly while maintaining structural integrity
Solution Approach 2:
The screw boss is pre-formed as an integrated feature of the housing structure during manufacturing, eliminating the need for separate coupling components and reducing assembly complexity
2Stability of the object's composition
If the housing portions are securely coupled, then the structural integrity is improved, but the manufacturing complexity increases
Solution Approach 1:
The screw boss is merged with the housing structure as a single integrated component formed during the same manufacturing process, eliminating separate manufacturing steps and reducing overall complexity
3Volume of moving object
If the impact mechanism is positioned between ring gear and hammer, then the compactness is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The impact mechanism is nested within the existing housing structure, utilizing the space between the ring gear and hammer components to house the impact mechanism, thereby achieving compactness without requiring additional external space
Data Source
AI summary
A power tool includes a housing having a first housing portion and a second housing portion, the first housing portion and the second housing portion collectively defining a motor housing portion and a handle housing portion, a motor supported within the motor housing portion, the motor including an output shaft defining an axis, a battery removably coupled to the handle housing portion to provide power to the motor, and a coupling mechanism positioned within the motor housing portion to couple the first housing portion and the second housing portion together.