Mower Blade Assembly Retention via Segmented Clips
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Solution Overview
Problem
Existing lawn mower blade devices lack a secure and efficient mechanism for attaching and detaching cutting edges, leading to potential loss or misalignment during operation.
Innovation Solution
A mower blade assembly with a rotatably coupled member featuring removable blades and clips that prevent removal, utilizing slots and pins for secure attachment and retention, allowing for easy replacement and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If blades are made removable for easy replacement, then ease of repair is improved, but reliability deteriorates due to potential loss or misalignment during operation
Solution Approach 1:
The blade assembly is segmented into the member (blade holder), the blade itself, and separate clips that can be independently assembled and disassembled. This allows the blade to be easily removed and replaced while the member and clips remain, facilitating maintenance while maintaining security through the clip retention mechanism.
Solution Approach 2:
The clips serve as intermediary elements between the member and the blade. These clips mediate the connection by engaging with slots on the member and securing the blade in place, providing a reliable retention mechanism that allows for easy removal when needed while preventing accidental loss during operation.
2Reliability
If a secure retention mechanism is added to prevent blade loss, then reliability is improved, but device complexity increases
Solution Approach 1:
The clips are designed to be simple self-retaining elements that snap into place on the member and automatically secure the blade without requiring additional fasteners, adjustment mechanisms, or complex assembly procedures. The clips serve themselves by providing both the retention and the release function through simple manual manipulation.
Solution Approach 2:
The retention function and the positioning function are merged into the single clip element. The clips simultaneously secure the blade to the member and maintain proper alignment, eliminating the need for separate retention devices and positioning mechanisms, thus adding reliability without proportionally increasing complexity.
3Reliability
If multiple components (clips, slots, pins) are used for secure attachment, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The attachment system is segmented into distinct functional elements: the member with integrated slots, the blade with matching features, and separate clips. This segmentation allows each component to be optimized for its specific function while maintaining simple overall assembly, as each piece fits into its designated position without requiring complex coordination.
Solution Approach 2:
The clips act as simple intermediary elements that bridge the blade and the member through the slots. The slots provide guided pathways that ensure proper alignment during assembly, while the clips provide the securing function. This intermediary mechanism simplifies operation by providing foolproof alignment and secure attachment in a single straightforward assembly action.
Data Source
AI summary
A mower blade assembly includes a member that may be rotatably coupled to an output shaft of a lawn mower and the member has a first coupling section and a second coupling section. A pair of blades is provided and each of the blades is removably attached to the member such that each of the blades may cut a lawn. A pair of clips is provided and each of the clips is removably coupled to the member such that each of the clips prevents the blades from being removed from the member.