Articulated Blade Guard Guide for Wall Saw Surface Tracking
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Solution Overview
Problem
Existing wall saws with blade guards face issues where the guard cannot move synchronously with the saw blade due to vertical displacement and dependency on guide rollers, leading to gaps and jamming, especially on uneven surfaces and in corner holes.
Innovation Solution
A wall saw with a protective guide comprising a first sub-arm fixed to the saw unit, a second rotatable sub-arm articulated to the first, and a third rotatable sub-arm articulated to the second, allowing the blade guard holder to rotate independently and maintain constant distance from the wall, eliminating the need for guide rollers and ensuring smooth movement with the saw blade.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the blade guard is driven via guide rails attached to the base body, then the blade guard can move along the wall, but it becomes dependent on the surface condition and cannot move flush with the saw on uneven surfaces
Solution Approach 1:
The protective guide employs a dynamic articulated linkage mechanism with three rotatable sub-arms that allow the blade guard to adapt its position and orientation in real-time. The first sub-arm is fixed to the saw unit, the second sub-arm is rotatably articulated to the first, and the third sub-arm is rotatably articulated to the second, creating a flexible system that can compensate for surface irregularities and maintain proper alignment with the saw blade during cutting operations.
2Ease of operation
If guide rollers are mounted on the open end of the blade guard to move along the wall, then the blade guard can follow the wall movement, but the rollers get dirty and jam, preventing smooth movement
Solution Approach 1:
The invention completely eliminates the guide rollers from the system. Instead of using rollers that contact the wall surface and are prone to contamination and jamming, the protective guide uses a purely mechanical articulated linkage driven by the saw unit itself, transferring movement through the rotatable sub-arms without any intermediate rolling elements that could fail.
3Adaptability or versatility
If the blade guard moves with the wall saw using guide rollers, then it can follow wall movement, but it falls into corner holes and cannot function properly
Solution Approach 1:
The articulated linkage with three rotatable sub-arms provides a dynamic system that can accommodate various wall geometries and corner configurations. The rotatable joints allow the protective guide to navigate around obstacles and maintain proper positioning without the guide rollers that would fall into corner holes, ensuring continuous reliable operation.
4Reliability
If the blade guard is mounted on a fixed holder, then it provides protection, but it cannot move synchronously with the saw blade during insertion and extraction
Solution Approach 1:
The invention merges the protective guide function with the saw unit's movement mechanism. The first sub-arm is fixed to the saw unit, and the articulated linkage combines the protective guide structure with the drive mechanism, so that the blade guard automatically moves synchronously with the saw blade during insertion and extraction without requiring separate drive systems.
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a wall saw comprising a saw unit (13) with a swivel arm (4) and a saw blade mountable on the swivel arm, a blade guard holder (6) and a guard guide, wherein the guard guide comprises a first partial arm (1) fixed to the saw unit (13), a second rotatable partial arm (2) pivotally fixed to the free end of the first partial arm (1) and a third rotatable partial arm (3) pivotally fixed to the second partial arm (2), wherein the blade guard holder (6) is attached to the free end of the third partial arm (3), on which a blade guard can be mounted.