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 cutting operations due to heavy, non-replaceable attachment plates, leading to increased user effort and the risk of kick-back injuries.
Innovation Solution
A rolling plate assembly with interconnectable housing members and removably attached wheels, made of materials like polyurethane or rubber, which reduces weight, facilitates smooth rolling, and allows for easy replacement of damaged parts, thereby enhancing safety and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a heavy flat attachment plate is used, then the portable power cutting tool has stable operation, but the user effort increases and accuracy reduces due to friction and side-to-side sliding
Solution Approach 1:
The attachment plate is segmented into multiple small wheeled elements (six wheels arranged in two rows of three) instead of a single solid plate. This segmentation allows each wheel to roll independently, reducing friction and preventing side-to-side sliding while maintaining stability through the distributed wheel configuration.
Solution Approach 2:
The invention replaces the flat planar surface of the attachment plate with spherical rolling elements (wheels). This curvature transformation enables rolling motion instead of sliding, significantly reducing friction between the attachment and workpiece surface, thereby reducing user effort while maintaining operational stability.
2Stability of the object's composition
If a heavy flat attachment plate is used, then the portable power cutting tool has stable operation, but the cutting accuracy reduces due to side-to-side sliding motion
Solution Approach 1:
The attachment plate is divided into multiple discrete wheeled elements that are spaced apart. This segmentation prevents the side-to-side sliding motion that occurs with solid plates, as each wheel is constrained to roll in the forward direction only, thereby maintaining cutting accuracy while preserving operational stability through the distributed wheel arrangement.
Solution Approach 2:
By replacing the flat plate with spherical rolling wheels, the invention eliminates the sliding motion that causes lateral deviation. The rolling motion of spherical wheels naturally constrains movement to the direction of travel, preventing side-to-side sliding and improving cutting accuracy while maintaining stability.
3Stability of the object's composition
If the attachment plate is made heavy, then the portable power cutting tool has stable operation, but the risk of kick-back injury increases due to unstable frictional binding
Solution Approach 1:
The invention replaces the flat friction-based attachment plate with spherical rolling wheels. This transformation changes the interaction mechanism from unstable frictional binding to reliable rolling contact. The rolling wheels maintain consistent contact with the workpiece without the side-to-side sliding that causes blade veering and kick-back, thereby reducing injury risk while preserving operational stability.
Solution Approach 2:
The invention converts the harmful sliding friction that causes kick-back into beneficial rolling friction. By using wheels that roll instead of slide, the harmful unstable binding is transformed into a stable rolling contact that prevents blade veering and kick-back injuries, while the distributed wheel configuration maintains operational stability.
4Ease of operation
If individual wheel attachments are placed on the saw bracket, then the portable power cutting tool achieves rolling motion, but the attachment process becomes time-consuming and complex
Solution Approach 1:
The invention merges six individual wheel attachments into a single integrated assembly that attaches to the saw bracket as one unit. This consolidation eliminates the need to individually place multiple wheels, significantly reducing attachment time and complexity while maintaining the rolling motion capability through the integrated wheel configuration.
Solution Approach 2:
The single integrated attachment assembly serves multiple functions simultaneously: it provides the rolling motion capability through its wheeled elements, maintains operational stability through its distributed wheel configuration, and enables quick attachment/detachment as a unified unit. This multi-functionality resolves the contradiction by achieving rolling motion without the time-consuming individual attachment process.
5Device complexity
If the attachment member is made as a single solid unit, then the structure is simple, but the weight increases and damaged parts cannot be replaced
Solution Approach 1:
The attachment member is segmented into multiple discrete components (six wheels, housing, mounting bracket) rather than being a single solid unit. This segmentation reduces overall weight by using lightweight materials for each component and allows damaged parts to be replaced individually. The segmented design maintains structural simplicity through modular construction that is easier to manufacture and assemble than a solid unit.
Solution Approach 2:
The invention transitions from a static solid attachment plate to a dynamic assembly with movable rolling wheels. This dynamic design reduces weight by using lightweight wheel components instead of a heavy solid plate, and enables easy replacement of damaged parts through the modular, movable nature of the wheel assemblies within the housing.
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 the effort required for operation, minimizes kick-back risks, and allows for quick attachment and adjustment of power tools, ensuring precise and safe cutting processes.
Implementation Method 1
facilitate the safe rolling movement of the portable cutting tool on the workpiece
Implementation Method 2
made of material such as polyurethane or rubber which creates a traction on a workpiece as the part is rolling during a cutting operation
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 front wheel housing portion, a back wheel housing portion, and two or three metal rods which interconnect the two housings. The housings removably retain a pair of spaced apart wheels and means to retain a cutting tool on the housings so that the cutting tool can be rolled on the workpiece during operation of the tool while the cutting blade portion of the tool extends between a pair of adjacent interconnecting rod members. The front and rear wheel housing assembly receives the cutting blade in between its pins or axles, so that the entire width of the saw plate is supported by the wheels during cutting.