Miter Saw Traction Guide with Differential Play Adjustment
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Solution Overview
Problem
The correct alignment and adjustment of the circular saw blade in pull-type miter saws are difficult due to existing alignment and adjustment mechanisms that do not ensure precise perpendicularity and are prone to play, leading to inefficiencies in cutting operations.
Innovation Solution
The implementation of a sliding guide with minimal play, such as a ball bushing, for one tie rod and a sliding guide with play and adjustable fixing elements for the other, allowing precise adjustment and correction of the saw blade's inclination, along with a pivoting lever that acts as a dust cover and spacer, ensuring accurate alignment and reducing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a sliding guide with minimal play (ball bushing) is used for one tie rod, then cutting accuracy is improved, but device complexity increases due to the need for different sliding guide configurations
Solution Approach 1:
The patent applies different sliding guide configurations to different tie rods based on their specific functional requirements. One tie rod uses a ball bushing sliding guide with minimal play for precise positioning, while the other uses a sliding guide with play and adjusting elements for adjustable positioning. This local differentiation resolves the contradiction by optimizing each component's precision according to its specific role rather than applying a uniform solution to all components.
2Ease of operation
If a sliding guide with play and adjusting elements is used for the other tie rod, then ease of adjustment is improved, but reliability decreases due to the presence of play
Solution Approach 1:
The sliding guide with play and adjusting elements provides a dynamic adjustment mechanism that allows the operator to easily modify the tie rod's position. The adjusting elements enable the play to be intentionally introduced or reduced based on operational requirements, transforming a static rigid connection into a dynamically adjustable one that balances ease of operation with reliable alignment when needed.
3Manufacturing precision
If multiple adjusting mechanisms are provided for precise blade alignment, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The alignment adjustment function is segmented across two different tie rods, each with its own specialized sliding guide configuration. One tie rod's ball bushing provides passive precision through minimal play, while the other's adjustable sliding guide provides active precision through adjusting elements. This segmentation of the adjustment function into specialized components achieves high overall alignment precision without requiring a single complex adjustment mechanism.
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 configuration simplifies and enhances the precision of saw blade alignment, reduces play, and allows for easy adjustment, improving cutting accuracy and efficiency by ensuring optimal alignment with the workpiece support surface.
Implementation Method 1
A ball bearing is disposed in one of the through holes to smooth the sliding movement of the tube and prevent the tube from being moved in the radial direction of the through hole
Implementation Method 2
the guide that guides the other tie rod is equipped with a sliding guide that is inserted into this guide with play
Data Source
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AI summary
The saw has a sawing assembly (5) supported at a holder (4) by a traction guide (18). A sliding guide e.g. ball-lining, is inserted in a guide and guides a tension rod (18a) in a practically play-free manner. Another sliding guide e.g. sliding bushing, is inserted in another guide and guides another tension rod (18b) with play. The latter sliding guide is fixed at radially different positions at the holder relative to the latter guide by a fixing element i.e. fixing screw. A pivoted lever made of fiber-reinforced plastic material is arranged on a side of the holder.