Power Tool Cable Guide Mounting Frame Vibration Damping
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Solution Overview
Problem
Power tools like demolition hammers experience excessive vibrations, causing operator discomfort and potential damage to internal components, and existing vibration dampening systems can degrade cables due to repeated bending, leading to tool failure.
Innovation Solution
A power tool design featuring a mounting frame with integrated cable guides that reduce cable stress by guiding cables through a U-shaped bend, using pivotally mounted arms to dampen vibrations and restrict cable movement, thereby minimizing cable wear and extending tool lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible section with a curve is used to guide the cable, then the cable can accommodate the movement of the inner assembly, but the repeated bending degrades the cable over time leading to tool failure
Solution Approach 1:
The cable management system is divided into multiple cable guides positioned at different locations along the cable path. This segmentation allows the cable to be supported at multiple points, reducing the bending radius and stress concentration at any single point, thereby extending cable life while maintaining flexibility.
Solution Approach 2:
Cable guides are pre-positioned along the expected cable path to proactively manage cable routing before degradation occurs. The guides are strategically placed to maintain optimal cable tension and bending angles throughout the range of motion, preventing premature cable failure.
2Reliability
If a large radius conductor channel is used to hold the cable, then the cable is not bent too abruptly, but the volume of the internal components increases
Solution Approach 1:
The cable guides utilize the three-dimensional space within the housing by positioning guides at different heights and angles. This allows the cable to follow a compact three-dimensional path that maintains adequate bending radius without requiring excessive linear space, thus reducing overall component volume.
Solution Approach 2:
The cable guides are designed with smooth curved surfaces that gradually change the cable direction, avoiding sharp angles. The curved geometry allows the cable to bend gently through multiple guides in a compact arrangement, protecting the cable while minimizing space requirements.
3Object-affected harmful factors
If the inner assembly is allowed to move between positions, then vibration dampening is achieved, but the cable experiences repeated bending stress
Solution Approach 1:
Multiple cable guides act as intermediary support points between the moving inner assembly and the fixed housing. These guides mediate the cable's interaction with the movement, maintaining consistent cable tension and routing throughout the range of motion, thereby reducing stress and preventing degradation while allowing full vibration dampening functionality.
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 solution effectively reduces operator discomfort, minimizes internal component damage, and extends the operational lifetime of power tools by reducing cable stress and wear, improving the overall durability of the tool.
Implementation Method 1
a mounting frame for guiding the inner assembly between the first position and the second position and having a cable guide for guiding at least part of a cable connected between the motor assembly and a component fixed relative to the housing
Data Source
AI summary
A power tool comprises a housing and an inner assembly mounted at least partially within the housing and configured to move between a first position and a second position with respect to the housing. The inner assembly comprises a motor assembly. The power tool also comprises a mounting frame for guiding the inner assembly between the first position and the second position and having a cable guide for guiding at least part of a cable connected between the motor assembly and a component fixed relative to the housing.