Electric Saw Depth Stop With Quick Sliding Rod Adjustment
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Solution Overview
Problem
Existing electric saws have a slow and laborious adjustable stop mechanism that requires significant time and effort to vary the cutting depth, as it involves rotating and locking a threaded bolt, making it cumbersome to change the cutting depth.
Innovation Solution
An adjustable stop with a smooth, non-threaded rod that slides longitudinally within a passage in the cutting head and is fixed using a lateral screw with an actuation knob, allowing quick adjustment and locking of the cutting depth by rotating the screw less than 180°, enabling the rod to automatically position and lock at the desired height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a threaded bolt with locknut is used for the adjustable stop, then the cutting depth can be limited, but the adjustment process becomes slow and laborious
Solution Approach 1:
The patent extracts the threading function from the adjustable stop mechanism, using a smooth rod without threads that slides freely in a passage. The threading is completely removed from the adjustment component, eliminating the time-consuming screwing and unscrewing operations while maintaining the depth limitation function through the rod's position against the frame or cutting head.
Solution Approach 2:
The patent separates the adjustment function from the fixing function. The smooth rod handles the adjustment by sliding freely, while a separate locking mechanism (such as a clamp or set screw) handles the fixing. This segmentation allows independent optimization of each function, making adjustment quick and fixing reliable without the compromise required by threaded systems.
2Adaptability or versatility
If a threaded bolt is rotated to adjust height, then the cutting depth can be varied, but the operation becomes cumbersome and time-consuming
Solution Approach 1:
The patent replaces the threaded mechanical system with a sliding mechanism. Instead of converting rotational motion to linear motion through threads, the system uses direct linear sliding of a smooth rod within a passage. This substitution eliminates the mechanical complexity of threading while maintaining the ability to vary cutting depth, significantly improving ease of operation.
Solution Approach 2:
The smooth rod is preliminarily positioned to slide freely within the passage, ready for immediate adjustment. The locking mechanism is preliminarily configured to engage quickly without requiring multiple rotations. This preliminary setup allows the operator to make rapid adjustments by simply moving the rod to the desired position and engaging the lock, rather than performing repetitive rotational actions.
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
This solution significantly simplifies and speeds up the process of adjusting and fixing the cutting depth, allowing for rapid changes and consistent cuts at selected depths, reducing the time and effort required for depth variations.
Implementation Method 1
the passage for mounting the rod is oriented vertically, and has adequate clearance for mounting and lowering the rod, by gravity, therein
Data Source
AI summary
The invention relates to an electric saw comprising: a frame (2) mounted on a base (1), a cutting head (3) mounted on the frame by using a rotating shaft (4) in the vertical direction and an adjustable stop (5) limiting the descent of the head and the cutting depth. The adjustable stop (5) comprises: a rod (51) mounted in a through manner, with the possibility of longitudinal sliding, in a passage (53) defined in the cutting head (3) and facing a fixed stop (21) defined in the frame (2); and a screw (54) for lateral tightening and fixing of the rod (51) inside the passage (53). The screw (54) comprises an actuation knob (55) and is threadedly mounted in a hole defined in the cutting head (3) and leading into the mounting passage (53) of the rod (51).