Miter Adjustment Assembly with Fine Actuator
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Solution Overview
Problem
Conventional miter saws require cumbersome and inaccurate methods for adjusting miter and bevel angles, often requiring multiple motions to lock and unlock the table and saw unit, which can be time-consuming and prone to error.
Innovation Solution
The implementation of a miter adjustment assembly with both coarse and fine adjustment mechanisms, including inter-engaging locking surfaces and detent assemblies, allows for precise and repeatable angular adjustments of the saw blade relative to the work piece, facilitated by a miter locking assembly and a fine adjustment actuator that enables incremental movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional locking mechanisms are used for the table and saw unit, then the structure is simple, but the adjustment process becomes cumbersome and time-consuming
Solution Approach 1:
The patent combines the locking and unlocking functions into a single integrated mechanism. The locking surfaces include interengaging protrusions and recesses that automatically engage when the table or saw unit is moved to the desired position, eliminating the need for separate locking steps and reducing the number of motions required.
Solution Approach 2:
The detent assembly is pre-positioned to automatically engage with the locking surfaces when the table or saw unit reaches the desired angular position. This preliminary positioning action occurs automatically during the adjustment process, eliminating the need for manual locking operations after adjustment.
2Measurement precision
If conventional adjustment mechanisms are used, then the device complexity is low, but the adjustment precision and repeatability are poor
Solution Approach 1:
The adjustment mechanism is segmented into distinct functional components: coarse adjustment surfaces for general positioning, fine adjustment detent assemblies for precise angular positioning, and locking surfaces for securing the position. This segmentation allows each component to specialize in a specific aspect of adjustment, improving overall precision without requiring a completely complex integrated system.
Solution Approach 2:
The detent assembly acts as an intermediary mechanism between the coarse adjustment and final locking. It provides intermediate precise positioning by engaging with the locking surfaces at specific angular intervals, enabling repeatable accurate adjustments without requiring the entire system to be highly complex.
3Productivity
If multiple locking motions are required, then the locking is secure, but the operation time increases
Solution Approach 1:
The locking mechanism allows the operator to skip through the adjustment process more quickly by using the detent assembly to automatically snap into place at the desired angular position. The single-motion locking mechanism rushes through the previously multi-step process by combining positioning and locking actions into one swift movement, reducing adjustment time while maintaining security.
4Reliability
If simple locking surfaces are used, then the manufacturing is easier, but the adjustment repeatability is reduced
Solution Approach 1:
The locking surfaces incorporate movable detent elements that can dynamically engage with the locking surfaces at multiple predetermined positions. This dynamic capability allows the mechanism to provide repeatable adjustments at various angles without requiring each surface to be precisely manufactured for every possible position, thereby maintaining reliability while simplifying manufacturing.
Data Source
AI summary
A power tool includes a housing assembly having a housing portion and an arm extending upwardly from the housing portion. The arm has an outer surface. The power tool also includes a drive unit supported by the arm. The drive unit is operable to drive a tool element to work on a work piece. The power tool further includes a collection assembly operable to collect debris generated by the tool element working on the work piece. The collection assembly includes a collection chute assembly having an inlet and an outlet. The collection chute assembly is positionable on the arm to define, between the inlet and the outlet, a first path for debris around one side of the outer surface of the arm and a second path for debris around the other side of the outer surface of the arm.