Impact Tool Vibration Isolation via Segmented Housing and Elastic Elements
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Solution Overview
Problem
Existing impact tools are oversized due to their vibration-proof housing structure, which covers the entire motor housing, compromising size efficiency while attempting to reduce vibration transmission to the handle.
Innovation Solution
The impact tool design features a striking mechanism with a motor whose rotation axis is transverse to the tool bit, using first and second elastic elements to connect the handle to the tool body, allowing axial movement and vibration reduction, and an outer shell housing that covers part of the tool body, reducing the double housing structure area for size minimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the outer housing entirely covers the inner housing including the motor housing to provide vibration-proofing, then the vibration transmission to the handle is reduced, but the impact tool is increased in size
Solution Approach 1:
The housing is divided into two separate parts: an inner housing that covers only the striking mechanism part, and an outer housing that covers the motor housing. These two housings are connected via elastic members rather than being fully integrated, allowing vibration isolation while reducing the overall size compared to a completely enclosing outer housing.
Solution Approach 2:
Elastic members are introduced as intermediary elements connecting the inner housing and outer housing. These elastic members serve as vibration isolators, reducing vibration transmission from the striking mechanism to the handle while allowing the compact segmented housing structure.
2Volume of moving object
If the outer housing covers part of the tool body to reduce size, then the overall dimensions are minimized, but the vibration-proofing coverage is reduced
Solution Approach 1:
Elastic members are used as intermediary vibration isolation elements between the inner housing (containing the striking mechanism) and the outer housing (containing the motor). This allows effective vibration proofing with minimal housing coverage, as the elastic members provide the necessary isolation without requiring a large enclosing structure.
Solution Approach 2:
The vibration-proofing structure is localized to where it is most needed - between the striking mechanism housing and the motor housing - rather than using a comprehensive outer housing that covers the entire tool body. This localized approach achieves effective vibration isolation with reduced overall size.
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
This configuration maintains vibration-proofing while significantly reducing the overall size of the impact tool by allowing the handle and outer shell housing to move relative to the tool body, effectively absorbing vibrations and optimizing the tool's compactness.
Implementation Method 1
The first elastic element is disposed between the first handle end portion and the tool body and connects the first handle end portion and the tool body such that the first handle end portion and the tool body can move in the axial direction of the tool bit with respect to each other
Data Source
AI summary
A technique for making a handle vibration-proof while avoiding size increase is provided in an impact tool. The impact tool has a striking mechanism part for driving a tool bit in its axial direction, a motor for driving the striking mechanism part, a tool body housing the motor and striking mechanism part, an outer shell housing covering part of the tool body, a handle that is integrally formed with the outer shell housing and extends transversely to the axial direction, a first handle end portion formed on one extending end of the handle, a second handle end portion formed on the other extending end of the handle, a first elastic element that connects the first handle end portion and tool body for relative movement in the axial direction, and a second elastic element that connects the second handle end portion and tool body for relative movement in the axial direction.