Pivoting Trimmer Attachment for Lawn Mower Deck Adaptation
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Solution Overview
Problem
Existing lawn mowers and trimmers are often separate units with limited versatility, and combination models with fixed or hinged trimmer mechanisms lack flexibility and safety features for various mower decks and operating conditions.
Innovation Solution
A trimmer attachment assembly with a pivoting arm and adjustable mounting system, including limit switches and locking collars, allows for secure attachment to various mower decks, enabling flexible positioning and operation, including a stored, level cutting, and over-rotation positions, with power from the mower's battery or separate sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the trimmer mechanism is rigidly fixed to the mower deck, then the structure is simple and stable, but the versatility and adaptability to different mower decks are reduced
Solution Approach 1:
The mounting plate is designed with multiple holes arranged in different patterns, allowing the same mounting plate to be adapted to various mower deck configurations. This universal design enables the trimmer attachment to work with different deck sizes and shapes without requiring multiple specialized mounting plates, thereby improving adaptability while maintaining relatively simple device structure.
Solution Approach 2:
The mounting system is divided into separate components: a mounting plate with multiple holes, a pivoting arm with adjustment mechanisms, and a trimmer head assembly. This segmentation allows each component to be independently adjusted and configured for different applications, enhancing versatility while keeping individual components simple and manageable.
2Adaptability or versatility
If the trimmer attachment has fixed positioning, then the structure is simple, but the flexibility for various cutting positions is limited
Solution Approach 1:
The trimmer attachment incorporates a pivoting arm that can rotate and adjust to different angles, transforming a static fixed-position design into a dynamic multi-position system. The pivoting mechanism allows the trimmer head to reach various cutting positions around the mower deck, providing flexibility without requiring an overly complex positioning system through the use of simple rotational joints and limit switches.
Solution Approach 2:
The mounting plate pre-configures multiple hole positions that anticipate different mounting requirements. By providing predetermined adjustment points before operation, the system enables quick positioning changes without requiring complex real-time adjustment mechanisms, thus achieving flexibility with minimal complexity.
3Ease of operation
If the trimmer attachment allows over-rotation, then the versatility of operation is improved, but the risk of collision and damage increases
Solution Approach 1:
Limit switches are installed on the pivoting arm to prevent over-rotation before collision can occur. These switches automatically stop the pivoting motion when the trimmer reaches safe angular limits, proactively counteracting the potential harmful effect of over-rotation and collision. This allows easy operation within safe boundaries while preventing damage through preliminary protective action.
Solution Approach 2:
The limit switches convert the potential harmful over-rotation into a beneficial safety feature. By deliberately designing the system to recognize and respond to approach limits, the potential damage from uncontrolled rotation is transformed into a protective mechanism that guides safe operation, enhancing ease of use while eliminating collision risks.
4Adaptability or versatility
If separate power sources are used for trimmer and mower, then operational independence is improved, but the complexity of power management increases
Solution Approach 1:
The power system is designed to accept multiple power sources universally - it can operate from the mower's existing battery or from a separate independent battery. The electrical system incorporates universal mounting and connection points that accommodate either configuration, providing operational independence when needed while maintaining simplicity by using the same basic electrical components and wiring approach regardless of power source.
Data Source
AI summary
A trimmer attachment for use with a lawn mower includes a deck mounting plate configured for attachment to the lawn mower, one or more mounting tabs extending up from the deck mounting plate, a curved pivoting arm rotatably coupled to the one or more mounting tabs, a pivoting motor for rotating the pivoting arm, and a trimmer head coupled to the pivoting arm. Rotation of the pivoting arm by the pivoting motor causes the trimmer head to rotate between a stowed position and an engaged position.