U-Shaped Mower Blade Insert Removal Tool
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Solution Overview
Problem
Existing tools for attaching and removing mower blade cutting edge inserts are difficult and hazardous due to accessibility issues and jamming caused by debris, and none have proven particularly effective in safely handling the sharp edges.
Innovation Solution
A removal and attachment tool with a U-shaped slot and impact buttons or weld material abutments that straddle the blade and insert, allowing for safe and efficient sliding contact to establish or break the wedging press fit connection, made of durable materials like steel for enhanced safety and effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a screw driver or chisel and hammer are used to attach or remove the cutting insert, then the insert can be removed or attached, but the tool may slip and cause injury to the user due to the sharp cutting edge
Solution Approach 1:
The patent introduces a specialized tool as an intermediary device between the user and the sharp cutting insert. This tool features a U-shaped body with a slot that receives the cutting insert, and an abutment that contacts the insert to apply force during attachment or removal. The tool acts as a mediator that protects the user's fingers from the sharp edge while enabling safe operation.
2Reliability
If the cutting insert is tightly jammed in its attached position due to debris or obstacles, then the connection is secure, but the insert becomes very difficult to remove
Solution Approach 1:
The tool design incorporates a U-shaped body with a slot that allows the cutting insert to be partially extracted from its recessed position before full removal. This preliminary action enables the user to break the jammed connection by pulling the insert out from under the connector heads, making subsequent complete removal much easier even when debris or obstacles are present.
3Volume of moving object
If the blade edge insert is not readily accessible, then the blade design is compact, but the insert cannot be easily reached by traditional tools
Solution Approach 1:
The patent changes the dimensional approach by designing a tool with a U-shaped body that wraps around the blade and insert assembly. The tool engages the insert from the top surface of the blade rather than requiring access from the bottom or side, allowing operation in confined spaces where traditional linear tools cannot reach.
Data Source
AI summary
An impact tool for removal and attachment of a mower blade cutting edge insert of the type demountably attached with a press fit wedging connection in a recessed end surface of the mower blade, the tool body having a U-shaped slot permitting the slot to receive and straddle adjacent edges of the mower blade and the insert when the latter is in the recessed end surface portion, sliding movement of the tool along the edges causes a contacting abutment in the bottom of the U-shaped slot to engage one or the other ends of the edge insert to drive the insert into or detach it from an operative press fit attachment.