Miter Saw Bevel Locking Mechanism for Front-Angle Adjustment
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Solution Overview
Problem
Existing sliding miter saws require users to reach behind the support section to adjust the bevel angle, which is inconvenient.
Innovation Solution
A bevel locking mechanism with a handle and gear system that allows users to adjust and lock the bevel angle without reaching behind, using a belt and nut system or a detent mechanism with conical portions and apertures to change and fix the angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the traditional bevel adjustment mechanism is used, then the bevel angle can be changed, but the user must reach behind the support section which is inconvenient and unsafe
Solution Approach 1:
The patent inverts the traditional mechanism arrangement by moving the bevel adjustment mechanism from the rear of the support section to the front. The handle is now positioned on the front surface of the support section, allowing users to adjust the bevel angle by reaching forward instead of reaching behind the moving blade assembly, thereby eliminating the safety hazard while maintaining full functionality
2Object-affected harmful factors
If the bevel adjustment mechanism is moved to the front, then user safety is improved, but the mechanical structure becomes more complex
Solution Approach 1:
The patent employs a nested mechanism where the bevel adjustment mechanism is integrated within the existing support section structure. The handle connects to a series of interconnected components (linkage arms, pivots, and locking elements) that are nested within the support section housing, allowing the complex mechanical function to be achieved without proportionally increasing the external dimensions or overall structural complexity
Solution Approach 2:
The patent introduces an intermediary linkage mechanism that translates the simple rotational motion of the front-mounted handle into the required angular adjustment of the support section. This intermediary system of connected arms and pivots acts as a mediator between the user input and the bevel angle change, enabling safe front-access adjustment while maintaining mechanical efficiency
Data Source
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AI summary
A miter saw (100) has a base assembly (110), a table (120) rotatably disposed on the base assembly (110), a support section (130) rotatably connected to the table (120), a guide bar (140) fixedly attached to and extending forwardly from the support section (130), and a saw assembly (150) sliding along the guide bar (140). The saw assembly (150) is pivotable downwardly for cutting a workpiece (W) disposed on the table (120). A handle (160K, 170H) is disposed adjacent to a forward end of the guide bar (140). The handle (160K, 170H) is movable between a first position for fixing a rotational position of the support section (130) relative to the table (120), and a second position for allowing rotational movement of the support section (130) relative to the table (120).