Portable Cutter Base Rib Layout to Prevent Bending Deformation
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Solution Overview
Problem
Conventional circular saw bases, particularly those made of sheet metal, are prone to bending and deformation under load due to the absence of reinforcing ribs and stands, which compromises their structural strength.
Innovation Solution
A portable cutter design that incorporates a base with ribs extending in the front-rear direction and a stand positioned outside the blade's through-hole, where the stand and rib positions partially overlap, providing additional reinforcement and stability to the base.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a sheet metal base is used instead of die casting, then the base can be formed with reinforcing ribs and improved manufacturability, but the base becomes prone to bending and deformation under load
Solution Approach 1:
The patent applies local quality by adding reinforcing ribs at specific locations on the sheet metal base where structural support is needed. The ribs are strategically positioned to provide local reinforcement without requiring the entire base to be made of heavy or complex material, thus maintaining ease of manufacture while improving strength at critical areas.
Solution Approach 2:
The patent creates a composite structure by combining the sheet metal base with the reinforcing ribs and stand components. This composite approach allows the base to leverage the flexibility and manufacturability of sheet metal while the added rib structures provide the necessary rigidity and load-bearing capacity.
2Strength
If the stand is positioned outside the through-hole formation region, then the stand can provide reinforcement to the base, but the stand occupies additional space that could be used for other functions
Solution Approach 1:
The patent resolves the space conflict by utilizing the vertical dimension. The stand extends upward from the base in the vertical direction, providing reinforcement without occupying additional horizontal area on the base surface. This allows the stand to strengthen the base structure while leaving the base area available for other functions intact.
3Strength
If ribs are added to reinforce the base, then the base strength increases, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent applies segmentation by dividing the base structure into distinct functional elements: the base itself, the reinforcing ribs, and the stand. This segmentation allows each component to be optimized independently and assembled together, providing the necessary strength while maintaining relatively simple manufacturing processes for each individual part.
Data Source
AI summary
Provided is a portable cutter wherein the entire base has increased strength. This portable cutter is provided with: a body having a prime mover and a saw blade which is driven by the prime mover; a base having a through-hole through which the saw blade protrudes and sliding on a material to be cut; and a stand which rises from the base and to which the body is connected. If the direction in which cutting progresses is designated as a front-rear direction, a rib extending in the front-rear direction is provided to the base. The stand is configured such that, in the left-right direction, the stand is either located outside a region in which the through-hole is formed, or extended to the outside of the region. The positions, in the front-rear direction, of the stand and the rib partially overlap each other.