Pivoting Chain Bar Assembly for Precise Wall Saw Corner Cuts
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Solution Overview
Problem
Existing wall saws face challenges in cutting corners due to the rounded shape of circular saw blades, leading to incomplete cuts and structural weakening from overcuts, and are complex and sensitive to dirt like concrete dust.
Innovation Solution
A wall or floor chain sawing device with a chain bar assembly that includes pivotable support rods and a locking arrangement, allowing the chain bar to adjust angles and perform circular movements within a cutting plane, reducing sensitivity to dirt and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a circular saw blade is used, then the sawing device can cut through material, but it cannot perform clear cuts in corners and creates overcuts that weaken the structure
Solution Approach 1:
The cutting tool is segmented into a chain with multiple cutting elements along a bar, replacing the single circular blade. This segmentation allows the chain to conform to corner geometries and achieve precise cuts without overcutting, as each link of the chain can engage material independently.
Solution Approach 2:
The chain bar assembly is made dynamically adjustable through pivotable support rods and a locking arrangement, allowing the chain bar to change its orientation and angle during operation. This dynamic capability enables the chain to adapt to corner positions and maintain precise cutting geometry throughout the cutting path.
2Manufacturing precision
If a pivotable chain bar assembly with sliding tracks is used, then corner cutting precision is improved, but the device becomes more complex and more sensitive to dirt
Solution Approach 1:
Instead of having the chain bar slide within fixed tracks (complex mechanical guidance), the support rods are made pivotable and the chain bar assembly can be locked at various positions. This inverts the approach from continuous sliding guidance to discrete angular positioning, reducing mechanical complexity and sensitivity to dirt accumulation.
Solution Approach 2:
The device changes from a fixed geometric configuration to an adjustable one, where the support rods can be rotated to different angles and locked in place. This parameter change (from fixed to variable angles) allows precise corner cutting while using simpler mechanical elements that are less sensitive to contamination.
3Manufacturing precision
If the chain bar is fixed in position, then the mechanical structure is simpler, but it cannot perform circular movements for precise corner cutting
Solution Approach 1:
The chain bar assembly is made dynamically adjustable through pivotable support rods and a locking arrangement, allowing the chain bar to change its orientation and angle during operation. This dynamic capability enables the chain to adapt to corner positions and maintain precise cutting geometry throughout the cutting path.
Data Source
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AI summary
The present invention relates to a wall or floor chain sawing device (1 ), comprising a chain bar assembly (37) which in turn comprises a chain bar (2) having a longitudinal extension (17) and guiding a chain (3) at least partly around its perimeter. The chain bar assembly (37) further comprises a chain bar housing (6) that is attached to, and partially covers, the chain bar (2) and the chain (3). The chain sawing device (1 ) comprises a motor (9), a track interface (7) that is arranged to co-operate with a guiding track (8), and a power transmission arrangement (10) that is adapted to transfer a motion from said motor (9) to the chain (3). The sawing device (1 ) comprises a first pivotable support rod (1 2) and a second pivotable support rod (13), where each pivotable support rod (12, 13) has a corresponding first end (12a, 13a) and a second end (1 2b, 13b). Each first end (12a, 1 3a) is at least indirectly pivotably attached to the motor (9), and each second end (12b, 13b) is at least indirectly pivotably attached to the chain bar assembly (37).