Wall Saw Locking Device for Blade Adjustment
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Solution Overview
Problem
Existing wall saws require operators to manually remove and reattach saw blades between partial cuts, which is cumbersome and poses a risk of unintentional startup due to the complex screw connection between the saw blade flange and drive spindle.
Innovation Solution
The design allows the drive spindle to be blocked in the direction of rotation and rotatable in the opposite direction, enabling the saw blade flange to be adjusted independently, with a locking mechanism using a tie rod and connecting elements for secure attachment, and a safety device with a lever and latch to prevent unintended rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a screw connection is used to fasten the saw blade flange to the drive spindle, then the connection strength is improved, but the ease of operation deteriorates because the operator must remove the saw blade to release the connection
Solution Approach 1:
The fastening system is segmented into a drive spindle with an internal thread and a saw blade flange with an external thread, allowing independent rotation and simplified attachment/detachment operations while maintaining secure connection during cutting
2Ease of operation
If the saw blade flange is made adjustable in the unlocked state, then the ease of operation is improved, but the reliability deteriorates due to risk of unintentional startup
Solution Approach 1:
The drive spindle is pre-designed with asymmetric rotational characteristics: it can rotate freely in the counter direction for easy positioning during blade changes, but is automatically blocked in the forward rotation direction to prevent unintentional startup, combining safety and operability in the default state
3Reliability
If the drive spindle is blocked in the direction of rotation, then the safety is improved, but the ease of operation deteriorates because the operator cannot easily reposition the blade
Solution Approach 1:
The drive spindle employs asymmetric rotational blocking: it is blocked in the forward rotation direction (direction of rotation) to prevent unintentional startup, but remains free to rotate in the counter direction, enabling easy repositioning of the saw blade flange during blade changes
Data Source
AI summary
Wall saw having a locking device (41). A saw blade flange (25) of the wall saw is adjustable by the locking device (41) between a locked state and an unlocked state, wherein, in the locked state, the saw blade flange (25) is connected to the drive spindle (33) for rotation therewith, and, in the unlocked state, is adjustable in relation to the drive spindle (33). In the unlocked state of the saw blade flange, the drive spindle is blocked in the direction of rotation of the saw blade and is designed to be rotatable about the axis of rotation in a counter direction directed counter to the direction of rotation.