Rolling Plate Assembly for Portable Power Cutting Tools
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Solution Overview
Problem
Conventional portable power cutting tools face issues with friction and accuracy during operation, leading to increased user effort and the risk of kick-back due to unstable attachment plates, which can cause injuries.
Innovation Solution
A rollable plate assembly with injection molded fiber enriched plastic, featuring a single piece design with stabilizer tubes and fins, removably retaining wheels for improved traction and stability, and an adjustable bevel gear assembly for precise blade orientation, along with a cutting guide to facilitate straight cuts and reduce kick-back.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional flat plate attachment is used, then the cutting tool can be supported during operation, but extra user effort is required to overcome friction and the plate tends to slide side-to-side reducing cutting accuracy
Solution Approach 1:
The patent replaces the conventional flat plate attachment with a curved or contoured attachment plate that conforms to the workpiece surface. This curvature allows the plate to roll rather than slide during cutting operation, significantly reducing friction and user effort while maintaining stable positioning and cutting accuracy.
2Stability of the object's composition
If a heavy flat attachment plate is used, then the cutting tool remains stable during operation, but the heavy weight contributes to kick-back danger and blade veering from linear motion
Solution Approach 1:
The patent changes the physical parameters of the attachment plate by reducing its weight through material selection and geometric optimization, while simultaneously introducing a curved surface profile. This allows the plate to maintain stability through rolling contact and proper geometry rather than relying on heavy weight, thereby reducing kick-back risk and preventing blade veering.
3Ease of operation
If wheels are individually placed on the saw bracket, then rolling motion is achieved, but the process is time-consuming and the wheels are not replaceable
Solution Approach 1:
The patent integrates multiple wheels into a single modular wheel assembly unit that attaches to the saw bracket as one component. This merging of individual wheels into a replaceable module simplifies the attachment process and enables easy replacement of the entire wheel assembly if wheels become worn or damaged, improving both ease of operation and ease of repair.
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 significantly reduces user effort, enhances operational stability, and minimizes kick-back by providing improved traction and vibration absorption, allowing for precise and safe cutting operations.
Implementation Method 1
injection molded fiber enriched plastic which includes an increased flat plate surface area and stabilizer fins... provides improved traction and vibration absorption
Implementation Method 2
frame assembly formed from a single piece of injection molded fiber enriched plastic which facilitates strong weight and torsional stress memory and which includes... stabilizer tubes and stabilizer fins
Data Source
AI summary
The present invention is an attachable rolling plate assembly which can be attached as a single unit to a portable cutting tool to facilitate the safe rolling movement of the portable cutting tool on the workpiece. The invention comprises a frame assembly formed from a single piece of molded material such as fiber enriched plastic having a pair of oppositely disposed longitudinal sidewalls with stabilizer fins extending therefrom, and a flat base portion having a pair of parallel stabilizer tubes molded therein. The invention further includes an adjustable bevel gear assembly by which the angle of orientation of the cutting blade can be quickly changed. The invention also includes a cutting guide assembly to facilitate a straight cut, reduce torsional rotation of the saw blade and reduce kickback of the saw.