Pivoting Mower-Mounted Weed Whacker for Uneven Terrain Trimming
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Solution Overview
Problem
Lawn mowing and weed whacking are typically performed as separate activities, with handheld weed whackers being used to trim grass in locations difficult to reach with a lawn mower, and there is a need for a weed whacker that can be operated simultaneously with a riding lawn mower to provide an even cut over uneven terrain.
Innovation Solution
A weed whacker attachment for a riding lawn mower that can pivot and adjust to uneven terrain, featuring multiple pivot points for instantaneous adjustments, shock-absorbing impact points, and operator-friendly adjustments for cutting angle, string length, and width, allowing simultaneous operation with the mower.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a handheld weed whacker is used for trimming, then precision trimming in difficult-to-reach locations is achieved, but the operation must be performed separately from lawn mowing and requires additional manual effort
Solution Approach 1:
The patent combines the weed whacker trimming function with the riding lawn mower by mounting the weed whacker assembly to the mower deck. This allows the operator to perform both mowing and precision trimming simultaneously in a single operation, eliminating the need to perform these tasks separately and thereby improving productivity while maintaining trimming precision through the controlled rotation of the weed whacker assembly.
Solution Approach 2:
The riding lawn mower is enhanced with multi-functionality by integrating the weed whacker assembly that can rotate independently on a vertical axis. This enables the single machine to perform both mowing (via the mower deck) and precision trimming (via the rotating weed whacker), allowing the operator to handle various lawn care tasks with one piece of equipment.
2Productivity
If the weed whacker is mounted on the mower deck, then simultaneous operation is achieved, but the ability to naturally adjust to uneven terrain is reduced
Solution Approach 1:
The patent introduces dynamic adjustability by allowing the weed whacker assembly to rotate on a vertical axis and by providing adjustable mounting brackets that can be repositioned. This dynamic configuration enables the assembly to adapt its orientation and position relative to the mower deck, allowing it to maintain effectiveness on uneven terrain while still being mounted to the mower for simultaneous operation.
Solution Approach 2:
The weed whacker assembly is designed as a separate, rotatable module that can independently adjust its position on the mower deck. This segmentation allows the trimming function to be dynamically positioned relative to the mower deck, enabling adaptation to uneven terrain while maintaining the benefit of simultaneous operation with the mowing function.
3Ease of manufacture
If fixed mounting brackets are used, then installation simplicity is maintained, but adaptability to various mower deck widths is reduced
Solution Approach 1:
The mounting brackets are designed with dynamic adjustability, allowing them to be repositioned along the mower deck to accommodate different deck widths. This dynamic configuration capability maintains the simplicity of the bracket design while providing versatility for different mower types and deck dimensions, enabling the same assembly to adapt to various installation scenarios.
Data Source
AI summary
A weed whacker attaches to the front of a riding lawn mower. The week whacker is attached to the riding lawn mower through a pivoting linkage, and is supported on castors which may be adjustable in height. The weed whacker may thereby traverse uneven terrain which differs from the terrain traversed by the riding lawn mower, continuing to provide an even cut over the terrain. The weed whacker draws its power from the riding lawn mower. The weed whacker may be shifted between the right and left sides of the riding lawn mower. The weed whacker may be controlled by the driver of the riding lawn mower, including unwinding additional cutting wire in response to a control signal from a controller used by the driver of the riding lawn mower.