Mitre Saw Guide Rod Structure for Precise Sliding Bevel Cuts
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Solution Overview
Problem
Existing sliding compound mitre saws face limitations in their sliding mechanism, particularly in efficiently performing sliding cuts due to the design of guide rails and pivot joints, which can restrict angular movement and stability.
Innovation Solution
The saw incorporates a pivot joint with a spring-biased cup-shaped section and guide rods supported by slide bearings, allowing for enhanced angular movement and stability, with an alternative design using a single bent guide rail to reduce material usage and improve manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional guide rails and pivot joints are used in sliding compound mitre saws, then the structure is simple and easy to manufacture, but the angular movement precision and stability are limited
Solution Approach 1:
The guide rail is divided into multiple segments including a first guide rail portion and a second guide rail portion, each with specific functions. The pivot joint is segmented into a cup-shaped section, a rod, and a cap. This segmentation allows each component to be optimized for its specific function while maintaining overall precision and stability.
Solution Approach 2:
A slide bearing is introduced as an intermediary element between the cutting unit and the guide rails. This intermediary component reduces friction and wear, enabling smoother and more precise angular movement while maintaining stability during sliding cuts.
2Loss of substance
If a single bent guide rail is used instead of multiple guide rails, then material usage is reduced and manufacturing is simplified, but guidance precision may be compromised
Solution Approach 1:
Multiple guide rail functions are merged into a single bent guide rail structure. The guide rail includes a first portion extending in a first direction and a second portion extending in a second direction, combining the functions of multiple separate rails into one integrated component that maintains guidance precision while reducing material usage.
Solution Approach 2:
The guide rail transitions from a simple linear structure to a bent three-dimensional structure with portions extending in different directions. This dimensional change allows the single rail to provide guidance in multiple axes, maintaining precision while eliminating the need for multiple separate rails.
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 improved sliding mechanism enables more precise and stable angular movement, facilitating better chop, bevel, and sliding cuts, while the alternative guide rail design reduces material usage and manufacturing complexity.
Implementation Method 1
a pivot joint with a spring-biased cup-shaped section and guide rods supported by slide bearings
Implementation Method 2
guide rods supported by slide bearings
Data Source
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AI summary
A saw comprising: a base assembly (6, 100); a base (222) pivotally mounted on the base assembly; two parallel guide rods (200) which are rigidly attached to the base (222) and which extend across the base assembly, one guide rod being located above the other guide rod; a cutting unit (50) slideably mounted on the two guide rods which is capable of being slid along the length of the guide rods (200) over the base assembly (6, 100); wherein the pivotal movement of the base on the base assembly results in the guide rods and cutting unit moving towards or away from the base assembly; wherein the two guide rods are manufactured from a single guide rod (600) which is bent to form a U shape having two straight parallel sides (602) joined together by a perpendicular connecting section (604), the two straight parallel sides forming the two guide rods, with the two free ends of the two straight parallel sides being rigidly attached to the base.