Miter Saw Locking Assembly for Optimal Blade Positioning

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Solution Overview

Problem

Existing sliding miter saws lack effective sliding rail stop features that allow operators to easily position the cutting assembly for optimal cutting of various work piece sizes and types, particularly for taller pieces like crown moldings and base boards.

Innovation Solution

A miter saw design incorporating a locking assembly with a latch and latch post mechanism that secures the cutting assembly in an intermediate position between the rear-most and forward-most positions, allowing for precise positioning and easy relocation, utilizing guide rails and a pivot linkage to facilitate sliding motion and optimize cutting capabilities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the cutting assembly is allowed to slide freely between front and rear ends of the table, then the saw can accommodate various work piece sizes, but the cutting assembly cannot be reliably positioned for optimal cutting of taller work pieces

Engineering Contradiction:
Improveability to accommodate various work piece sizesVSAvoidpositioning accuracy for optimal cutting
Core Design Contradiction:
Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The locking assembly is pre-configured with a latch and latch post mechanism that automatically engages at a predetermined intermediate position on the guide rails, eliminating the need for manual positioning adjustments and ensuring consistent optimal positioning for cutting taller work pieces

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The latch acts as an intermediary mechanism between the cutting assembly and the guide rails, providing a reliable stopping point at the intermediate position that enables precise positioning while maintaining the ability to slide freely when the latch is disengaged

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If the cutting assembly is locked in a fixed position, then optimal cutting of taller work pieces is achieved, but the saw cannot be easily reconfigured for different work piece sizes

Engineering Contradiction:
Improvepositioning accuracy for optimal cuttingVSAvoidability to reconfigure for different work piece sizes
Core Design Contradiction:
Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The locking assembly incorporates a movable latch that can be easily engaged and disengaged, allowing the cutting assembly to transition between locked and unlocked states. This dynamic mechanism enables the operator to lock the cutting assembly at the intermediate position for optimal cutting of taller work pieces, then unlock it to slide and reposition for different work piece sizes

Inventive Principle:
Principle #15Dynamics

3Device complexity

If manual positioning of the cutting assembly is used, then the saw structure remains simple, but the operator cannot easily achieve and maintain optimal cutting position

Engineering Contradiction:
Improvesimplicity of saw structureVSAvoidease of positioning cutting assembly
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The locking assembly is designed to be self-actuating through a simple latch mechanism that automatically engages with the latch post when the cutting assembly reaches the intermediate position on the guide rails. This self-service feature eliminates the need for complex motorized positioning systems while providing easy-to-operate locking and unlocking functionality

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS9707633B2Miter saws having locking assemblies for optimal positioning of cutting blades
Publication Date: 2017.07.18 BLACK & DECKER CORP
  • US9707633B2 patent drawing
  • US9707633B2 patent drawing
  • US9707633B2 patent drawing

AI summary

A miter saw includes a base, a table disposed on the base and having a top surface extending between a front end and a rear end of the table, a cutting assembly overlying the table, the cutting assembly including a rotatable cutting blade having a peripheral cutting edge, and a motor for driving the cutting blade. The miter saw has at least one guide rail interconnecting the table and the cutting assembly for guiding sliding movement of the cutting assembly over the table between a rear-most position and a forward-most position. A locking assembly is coupled with the cutting assembly for locking the cutting assembly in only one position between the rear-most position and the forward-most position. During a cutting operation, the locking assembly remains coupled with the cutting assembly while the cutting blade moves downwardly for preventing sliding movement of the cutting assembly.