Pivoting Saw Dust Cover for Strong Suction and Clear Cutting View
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cutting and dust collecting assemblies for circular saws face challenges in maintaining effective suction pressure due to large hood-shaped blade guards, leading to inefficient dust removal, especially during initial stages of cutting, and are cumbersome for operators.
Innovation Solution
A cutting and dust collecting assembly with a cover device and blade guard connected via a hinge, where the rear arm distance is increased to allow the cover device to pivot downwards for improved visibility and efficient dust collection, and a connection member facilitates dust removal through a longitudinal passage without obstruction, enhancing suction efficiency at all cut depths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large hood-shaped blade guard is used to collect dust, then dust collection coverage is improved, but suction pressure is lost and the assembly becomes bulky
Solution Approach 1:
The blade guard is segmented into a fixed portion attached to the saw and a movable cover device that can pivot independently. This segmentation allows the cover device to move closer to the cutting site without increasing the overall size of the fixed blade guard, maintaining suction pressure while improving dust collection coverage at the cut source.
Solution Approach 2:
The cover device is made dynamic through a pivot connection that allows it to move between a retracted position (maintaining suction pressure) and an extended position (improving dust collection coverage). This dynamic adjustment resolves the contradiction between maintaining pressure and increasing coverage.
2Productivity
If the cover device is extended forward to improve dust collection, then dust removal efficiency is improved, but operator visibility is reduced
Solution Approach 1:
The cover device pivots forward only when needed for dust collection during cutting operations. When retracted, it does not obstruct the operator's view of the cutting site. This dynamic positioning resolves the contradiction between improving dust removal efficiency and maintaining operator visibility.
3Quantity of substance
If the blade guard completely surrounds the saw blade, then dust collection is improved, but the assembly becomes cumbersome and less ergonomic
Solution Approach 1:
The blade guard is divided into a fixed portion and a movable cover device. The fixed portion maintains structural integrity and connection to the saw, while the movable cover device provides dust collection coverage only when needed. This segmentation reduces the overall bulkiness while maintaining dust collection effectiveness.
Solution Approach 2:
The movable cover device can be positioned as needed rather than permanently extending forward. This dynamic capability provides dust collection effectiveness when required while improving ergonomics and ease of operation when the cover is retracted.
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 enables efficient dust and slurry collection from the start of the cut to deep cuts, improves operator visibility, and reduces the assembly's bulkiness, making it more ergonomic and user-friendly for various cutting tasks.
Implementation Method 1
Dust or slurry can be sucked away by a vacuum source
Data Source
AI summary
A cutting and dust or slurry collecting assembly that comprises: a) a circular saw blade (4) b) a blade guard (5) c) a cover device (6), and the cover device (6) has a front end (31), a rear end (32), a top surface (34), a bottom surface (36), elongated sidewalls (35), and a longitudinal passage (45,46) for the saw blade, d) the blade guard (5) and the cover device (6) being pivotally connected or connectable to one another via a hinge (40) in or adjacent to a lower rear corner of the blade guard (5), such that the cover device and the blade guard can be turned in relation to each other, e) a discharge member (52) is provided at the rear of said hinge and has an outlet (58) which can be connected to a vacuum source, f) a connection member (12) connects the discharge member (52) with at least one of the longitudinal passage (45, 46) and the cut created rear of the longitudinal passage, g) that the direction of rotation of the saw blade (4) is such that a circumferential part of the blade which has passed beyond the bottom surface of the cover device will move in a direction upwards-rearward towards the bottom surface In particular a rear arm distance (LR) between the hinge (40) and the rear end (32) is bigger than 0.2 R and preferably bigger than 0.25 R, thereby enabling a turning of the cover device (6) by pressing the rear end (32) towards the structure to be cut.