Automatic Chainsaw Sharpener Preserves Tooth Hardness
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Solution Overview
Problem
Existing automatic sharpening technologies for chainsaw chains are either bulky, require a mains supply, lead to deterioration of cutting teeth due to abrasive grinding, or are complex and inefficient, often altering the hardness of the teeth and reducing performance.
Innovation Solution
An automatic sharpener with a chain support and drive mechanism for stepwise-regulated horizontal translation, featuring sharpening and planing means with flat and round files, adjustable pressure, and a digital control system for precise sharpening and planing at different angles, allowing for 'cold' grinding without heating the teeth, and accommodating chains with depth limiters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an abrasive disk or disc grinding wheel is used for automatic sharpening, then automation and productivity are improved, but the cutting teeth deteriorate and hardness is altered
Solution Approach 1:
The patent replaces the abrasive mechanical grinding system with a mechanical filing system. The file holder with filing elements mechanically files the cutting teeth through controlled reciprocating motion, eliminating the thermal and structural damage caused by abrasive disks while maintaining automation through motor-driven operation.
Solution Approach 2:
The patent changes the sharpening mechanism from high-speed abrasive contact to controlled mechanical filing motion. The reciprocating movement of the file holder with adjustable pressure and multiple filing elements creates precise material removal without the harmful effects of abrasive grinding, preserving tooth hardness while enabling automation.
2Manufacturing precision
If a manually operated disk grinding wheel is used, then sharpening accuracy is improved, but the process is time-consuming and requires disassembly
Solution Approach 1:
The patent combines multiple filing elements in a single file holder assembly that processes multiple teeth simultaneously. The reciprocating motion mechanism integrates positioning, filing, and depth control in one automated operation, eliminating the need for manual disassembly and sequential processing while maintaining precision through controlled mechanical action.
Solution Approach 2:
The file holder assembly is designed to automatically position and file the cutting teeth through its reciprocating motion mechanism. The system self-regulates the filing process through the mechanical interaction between the filing elements and the chain teeth, eliminating the need for continuous manual intervention while maintaining accurate sharpening.
3Extent of automation
If a bulky automatic sharpener with mains supply is used, then automation is achieved, but portability and ease of operation are reduced
Solution Approach 1:
The patent divides the sharpening system into a compact modular file holder assembly that can be easily attached and detached from chainsaws. The filing mechanism is segmented into discrete elements within a small housing, enabling portability and field operation while maintaining automated functionality through electric motor integration.
Solution Approach 2:
The file holder assembly incorporates a reciprocating motion mechanism that provides dynamic automated filing action. The motor-driven reciprocating motion enables automatic sharpening operation in a compact form factor, allowing the system to be portable yet fully automated during operation.
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 solution provides accurate, efficient, and maintenance-friendly automatic sharpening that preserves the hardness of chainsaw chain teeth, improving cutting performance and reducing wear, while being portable and energy-efficient, avoiding the drawbacks of traditional methods.
Implementation Method 1
a round file arranged to sharpen the cutting edge of the cutting tooth
Implementation Method 2
a flat file arranged to plane the depth limiter of the cutting tooth
Data Source
AI summary
The invention relates to an automatic sharpener for cutting teeth of a chain-saw chain of the type that has links and cutting teeth comprising a depth gauge. The sharpener comprises a receiving region comprising a chain support that can receive a chain-saw chain of the above-mentioned type, a driving means allowing a preferably automatically regulated horizontal translation, forwards and in stages, of said chain-saw received in the receiving region, a sharpener means arranged so as to sharpen the cutting teeth at different sharpening angles, after each translation of a chain-saw chain, and a means for planing the depth gauge of a cutting tooth, the planing means and the sharpening means each comprising a flat file and a round file which are detachably secured in a file carrier.