Foldable Edge Trimming Assembly for Lawn Mower Boundaries
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Solution Overview
Problem
Lawn mowers struggle to completely cut grass at edges and corners due to their body being wider than the mowing mechanism, leading to incomplete cutting and reduced trimming quality.
Innovation Solution
A lawn mower with an edge trimming assembly that can switch between unfolded and folded states via an elastic assembly, using an arcuate groove and elastic assembly to buffer impacts and prevent damage during collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the body of the lawn mower is made slightly wider than the mowing mechanism to meet safety regulations, then safety is improved, but the mower becomes unable to completely cut grass at edges or corners, worsening trimming quality
Solution Approach 1:
The lawn mower is divided into two functional parts: a main body for safe operation and a separate edge trimming assembly for precise cutting. The edge trimming assembly can be extended to reach boundary areas, allowing the main body to maintain safety width while the trimming mechanism achieves complete edge coverage through its extended positioning capability
2Stability of the object's composition
If the edge trimming assembly is made rigid to ensure stable cutting, then cutting stability is improved, but the assembly becomes vulnerable to damage from rigid collisions with obstacles, worsening reliability
Solution Approach 1:
The edge trimming assembly is designed with dynamic characteristics, allowing it to rotate and adjust its position. When collision with obstacles is detected, the assembly can automatically rotate away from the obstacle, transforming from a static rigid structure to a dynamic adaptive mechanism that maintains both cutting stability during operation and durability during collision avoidance
Solution Approach 2:
The system incorporates sensors and control mechanisms that detect obstacles before rigid collision occurs. The elastic assembly and rotational mechanism provide preemptive protection by allowing the trimming assembly to rotate away from detected obstacles, cushioning against potential damage before it happens
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
Enhances operational safety and trimming quality by preventing rigid collisions and ensuring complete cutting at boundaries and corners.
Implementation Method 1
an elastic assembly, two ends of the elastic assembly being movably connected to the fixing portion and the connecting portion, respectively, wherein the elastic assembly continuously provides an elastic force in a direction of the connecting portion so as to drive the edge trimming assembly to switch toward the unfolded state or the folded state
Data Source
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AI summary
A lawn mower, comprising a mower body, an edge trimming assembly, and an elastic assembly. A side of the mower body is provided with an arcuate groove and a fixing portion. The edge trimming assembly includes a mounting bracket provided with a connecting portion, and the connecting portion extends into the arcuate groove. Two ends of the elastic assembly are movably connected to the fixing portion and the connecting portion, respectively. The elastic assembly continuously provides an elastic force toward the connecting portion so as to drive the edge trimming assembly to switch toward an unfolded state or a folded state. The elastic assembly is further configured to buffer an impact applied to the edge trimming assembly.