Circular Saw Tilt Stop Mechanism for Precision Bevel Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing miter saws have complex and cumbersome inclination adjustment mechanisms, requiring multiple handling steps and posing a risk of injury due to the need for manual operation behind the saw unit, and they often lose precision when adjusting to slightly larger angles, such as 47°, which can affect accuracy in cutting.
Innovation Solution
A tilt stop mechanism with two differently positioned stop surfaces allows for easy switching between precise and slightly larger bevel angles without changing the stop surface position, featuring a turntable with a resilient latching element and a threaded pin for precise adjustment, enabling easy operation and maintaining angle precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manual snap-in fixation mechanism is used for inclination adjustment, then the saw unit can be locked at defined angles, but the operator must manually reach behind the saw unit to release the fixation, increasing the risk of injury and reducing ease of operation
Solution Approach 1:
The patent inverts the conventional manual release mechanism by implementing an automatic spring-loaded bolt that protrudes to manually releasable latching elements on the turntable. Instead of the operator reaching behind the saw unit to release the fixation, the bolt automatically engages with the latching elements, and the operator simply needs to press the bolt forward to release the inclination lock, completely reversing the operational sequence and eliminating the need to reach behind the saw unit
Solution Approach 2:
The spring-loaded bolt automatically engages with the latching elements to lock the inclination position without requiring manual intervention for engagement. The system serves itself by using spring force to maintain the locked position, and the operator only needs to apply minimal force to press the bolt forward for release, reducing the operational complexity and improving safety
2Device complexity
If the inclination adjustment is located at the back of the workpiece support surface, then the mechanism can be compact, but the operator must reach behind the saw unit to operate it, creating safety risks
Solution Approach 1:
The patent repositions the operational interface of the inclination adjustment mechanism from the back of the workpiece support surface to the front, where the spring-loaded bolt and turntable with latching elements are accessible to the operator. This inversion of the operational interface location eliminates the need to reach behind the saw unit, maintaining the compact internal mechanism design while removing the safety hazard
3Measurement precision
If a threaded pin adjustment is used to precisely set the desired angle, then measurement precision is improved, but the adjustment mechanism becomes more complex and time-consuming to operate
Solution Approach 1:
The patent segments the angle adjustment mechanism into two independent functional parts: a spring-loaded bolt that provides the mechanical locking force, and a turntable with multiple positioned latching elements that define specific inclination angles. This segmentation allows the precision function to be handled by the geometrically positioned latching elements while the bolt handles the locking function, simplifying the overall operation compared to fine-threaded adjustments
Solution Approach 2:
The turntable is designed with discrete latching elements positioned at specific angular intervals (e.g., 0°, 15°, 30°, 45°, 60°, 75°), creating a periodic structure that provides predetermined angle options. This periodic arrangement allows the operator to quickly select from standard angles without continuous adjustment, reducing both complexity and operation time while maintaining precision for common cutting angles
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 simplifies the adjustment of bevel angles, reducing the risk of injury and ensuring precise cuts by allowing easy selection between angles like 45° and 47° without losing precision, enhancing user safety and operational efficiency.
Implementation Method 1
a resilient latching element (34) which latches into a counter-element (35) on the fixed part (24) at each stage
Implementation Method 2
The inclination stop can be switched between the two stop surfaces. One of the stop surfaces, in particular the one which corresponds to the exact tilt angle, can be adjusted by means of a threaded pin (31)
Data Source
AI summary
The invention relates to a circular saw comprising a support (1), a holding device (4) that is arranged on the support (1) and a sawing unit (5). An adjustable inclination control element (15) is arranged on the holding device (4) enabling said sawing unit (5) to be pivoted in an inclined manner in relation to the support (1) about a horizontally extending inclination axis (16) that can be pivoted in the direction of sawing. Said adjustable inclination control element (15) comprises a fixed part (24) and an inclination pivoting part (25). A fixed inclination stop (29) is arranged on at least one side of one of the parts (24, 25), said inclination stop corresponding to a frequently used inclination angle of the sawing unit (5). A counter stop (30) that is associated with the fixed angle stop (29) is arranged on the other part (24, 25). Said sawing unit (5) is at the desired inclination angle in relation to the bearing surface work piece (2) when the counter stop (30) is applied to the inclination stop (29). According to the invention, the inclination stop (29) comprises at least two marginally differently positioned stop surfaces (29a,b), the positions thereof defining the marginally different inclination angles of the sawing unit (5) and one element (32) of the inclination stop (29) is preferably adjustably mounted in a stepped manner such that the counter stop (30) only ever rests on exactly one of the stop surfaces (29a,b).