Work Tool Housing Assembly for Ergonomic Vibration Control
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Solution Overview
Problem
Existing work tools with housing structures that house mechanism members like motors and spindles can be uncomfortable for users due to joints forming on the handle surface, causing discomfort during operation.
Innovation Solution
A work tool design featuring an inner housing with a motor and spindle, an outer housing with an elastic member between the inner and outer housings to absorb vibrations, and a handle configuration that avoids the joint from contacting the user's palm, allowing for ergonomic comfort and efficient assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the first and second housing elements are assembled to form a joint on the upper surface, then the housing structure is complete and functional, but the joint contacts the user's palm and causes discomfort
Solution Approach 1:
The patent changes the assembly direction from vertical (top-bottom) to horizontal (left-right transverse direction). This dimensional change allows the joint to be positioned on the side surface of the housing rather than on the upper handle surface, eliminating contact with the user's palm while maintaining structural integrity and manufacturing efficiency
2Productivity
If the joint is positioned on the upper surface for simple assembly, then manufacturing efficiency is high, but vibration is transmitted to the user's hand
Solution Approach 1:
By changing the assembly direction to transverse (horizontal), the joint is repositioned from the upper handle surface to the side surface of the housing. This spatial relocation removes the joint from the vibration transmission path to the user's hand, eliminating the harmful vibration effect while preserving assembly efficiency
Solution Approach 2:
The patent introduces an elastic member as an intermediary between the first and second housing elements at the joint location. This elastic member absorbs and attenuates vibrations generated during operation, preventing their transmission to the user's hand through the handle, thus resolving the vibration transmission issue
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
The design provides an ergonomically excellent work tool that reduces user discomfort and maintains high manufacturing efficiency by effectively preventing vibration transmission and optimizing the placement of heavy components for reduced moment of inertia.
Implementation Method 1
an elastic member disposed between the inner housing and the outer housing
Data Source
AI summary
It is an object of the invention to provide an ergonomically excellent work tool while maintaining high manufacturing efficiency. A representative work tool is provided which performs a prescribed operation on a workpiece by driving a tool accessory. The work tool has an inner housing that houses a motor and a spindle, an outer housing and an elastic member. A first inner housing element and a second inner housing element are assembled while being opposed to each other in a transverse direction, and a first outer housing element and a second outer housing element are assembled while being opposed to each other in a vertical direction.