Rollable 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 due to heavy, non-replaceable wheel attachments, leading to increased user effort and the risk of kick-back injuries from unstable friction binding.
Innovation Solution
A rollable plate assembly with removably retained wheels made of polyurethane or rubber, extending from the leading edge of the housing, and an adjustable bevel gear assembly for quick blade orientation, integrated with a cutting guide to facilitate smooth rolling and straight cuts, reducing kick-back and allowing easy wheel replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional flat plate attachments are used, then the cutting tool can be supported on the workpiece, but extra user effort is required to overcome friction and the plate slides side-to-side reducing cut accuracy
Solution Approach 1:
The patent replaces the conventional flat plate attachment with curved or rounded bottom surfaces on the cutting tool housing. This curvature allows the tool to roll smoothly along the workpiece surface rather than slide, significantly reducing friction and the effort required by the user while maintaining cut accuracy through stable rolling motion.
2Stability of the object's composition
If heavy flat attachment plates are used, then the cutting tool is stable, but the weight causes the blade to veer off straight line motion and creates kick-back danger
Solution Approach 1:
The curved bottom surfaces enable rolling motion that reduces the stabilizing weight requirement. The rolling action provides inherent stability through continuous contact point movement, preventing the blade from veering off course while eliminating the kick-back hazard associated with heavy flat plates binding against the workpiece.
Solution Approach 2:
The patent changes the physical parameter of the attachment surface from flat to curved, fundamentally altering the interaction mechanism from sliding friction to rolling motion. This parameter change reduces both the weight needed for stability and the harmful kick-back effects.
3Device complexity
If wheel attachments are made heavy and non-replaceable, then the structure is simple, but replacement is difficult and user effort increases
Solution Approach 1:
The cutting tool is divided into modular segments, with the bottom surface attachment being a separate replaceable component. This segmentation allows the attachment to be easily removed and replaced without affecting the main tool structure, significantly improving ease of repair while maintaining simple overall device design.
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, improves traction and stability, minimizes kick-back, and allows for quick adjustment of blade angles, enhancing the safety and efficiency of cutting operations.
Implementation Method 1
wheels made of polyurethane or rubber which creates a traction on a workpiece as the part is rolling
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.