Cable-Driven Display for Circular Saw Cutting Depth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cutting length display apparatuses for power tools lack an efficient and precise method to display the position of cutting edges on a workpiece in relation to the set cutting depth, particularly for portable circular saws, which affects the accuracy and safety of machining operations.
Innovation Solution
A cutting length display apparatus utilizing a cable system unit with a cam element and pull cable to change the pose of a display element, allowing for precise display of cutting edge positions on a workpiece, including the use of laser display elements and a guide unit for adaptable movement, enabling accurate visualization of cutting edges and cutting lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a cable system unit with cam element and pull cable is used to change the pose of the display element, then the display precision and adaptability to varying cutting depths are improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex electronic sensing and actuation systems with a purely mechanical cable-pulley-cam system. The pull cable (28) connected to the cam element (26) mechanically translates cutting depth adjustments into precise display element positioning, eliminating the need for electronic sensors, motors, or control systems while achieving accurate real-time display of cutting edge positions
Solution Approach 2:
The cam element (26) acts as an intermediary mechanical component that converts the linear motion of the pull cable into rotational motion to position the display element. This cam mechanism serves as a mechanical mediator that simplifies the transmission of motion from the cutting depth adjustment to the display system, reducing overall device complexity while maintaining precision
2Adaptability or versatility
If the display element is made translationally and/or rotationally movable to show cutting edge positions, then the adaptability to different cutting depths and tool diameters is improved, but the device complexity increases
Solution Approach 1:
The display element (14) is designed with translational and rotational degrees of freedom, allowing it to dynamically adjust its position and orientation based on cutting depth settings. The laser display unit can translate along guide rails and rotate to project cutting edge positions accurately for various cutting depths and tool diameters, providing adaptability through controlled motion rather than fixed positioning
Solution Approach 2:
The movable display element serves multiple functions: it displays cutting edge positions for different cutting depths, adapts to various tool diameters, and can orient the laser projection in different directions. This single multi-functional component replaces what would otherwise require multiple fixed display elements for different operating conditions, reducing overall device complexity
3Measurement precision
If a laser beam is used to form the cutting edge display line, then the visibility and precision of the display is improved, but the energy consumption increases
Solution Approach 1:
The patent uses a laser display element (14) that projects a visible laser line onto the workpiece to indicate cutting edge positions. This optical method provides high precision and visibility without requiring complex electronic sensors, cameras, or display screens, thereby reducing overall energy consumption while maintaining high measurement precision
Solution Approach 2:
The laser display element projects a visible laser beam that creates a bright, high-contrast display line on the workpiece surface. This optical approach provides excellent visibility and precision for indicating cutting edge positions without consuming significant energy, as lasers are energy-efficient light sources compared to electronic display screens or illumination systems
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 provides a compact, robust, and cost-effective method for displaying cutting edge positions, enhancing machining precision and safety by accurately showing cutting edge positions and lengths relative to the set cutting depth, even for tools with varying diameters.
Implementation Method 1
The cutting edge display line can be formed by the display element itself or by a light beam produced and projected by the display element, in particular by a laser beam produced and projected by the display element
Data Source
AI summary
A cutting length display device for a hand-held machine tool includes at least one display unit and a cable system unit. The at least one display unit includes at least one movably mounted display element for displaying at least one position of a cutting edge of a machining tool on a workpiece configured to be machined depending on a set cutting depth of the machining tool. The cable system unit is configured to change a position of the at least one display element depending on the set cutting depth of the machining tool.