Angled Pivoting Baffles for Convertible Mower Deck
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Solution Overview
Problem
Existing convertible mower decks have complex linkages and reduced discharge openings, which limit the quantity of clippings that can be discharged or collected and increase the risk of clipping buildup, necessitating a simplified linkage and larger discharge opening for improved performance.
Innovation Solution
The mower deck features angled pivoting baffles that pivot between open and closed positions to control the flow of grass clippings between cutting chambers, with a single control structure allowing for easy operation between discharge, collection, and mulching modes, and a larger discharge opening for enhanced clipping management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed baffle is positioned near the mower blade under the right side to provide good mulching mode performance, then mulching performance is improved, but the discharge opening becomes significantly smaller
Solution Approach 1:
The fixed baffle is replaced with a pivoting baffle that can dynamically change its position between mulching mode (near the blade) and discharge mode (retracted away from the discharge opening). This allows the system to optimize for mulching performance when needed while restoring full discharge opening area when clipping discharge is required.
2Stability of the object's composition
If traditional linkage systems are used to synchronize multiple pivoting baffles, then baffle synchronization is achieved, but the linkage becomes complex with more parts and increased cost
Solution Approach 1:
Multiple independent pivoting baffles are merged into a single unitary baffle structure. This eliminates the need for complex linkage systems to synchronize multiple separate baffles, as the single integrated baffle moves as one piece while still providing the same functional benefits of clipping flow control between cutting chambers.
3Reliability
If the discharge opening is reduced to accommodate a fixed baffle for mulching mode, then mulching performance is improved, but the quantity of clippings that can be discharged or collected is reduced
Solution Approach 1:
The baffle system transitions from a fixed configuration that permanently reduced discharge opening area to a dynamic system where the baffle can pivot between positions. In mulching mode, the baffle is positioned near the blade for optimal performance; in discharge mode, the baffle pivots away to restore the full discharge opening area, maximizing clipping discharge quantity.
Data Source
AI summary
A convertible mower deck has a plurality of adjoining cuffing chambers under a mower deck, each cutting chamber having a cutting blade mounted to the lower end of a vertical spindle. Angled pivoting baffles are positioned in the openings between adjoining cutting chambers, and a baffle also is mounted in the discharge opening from one of the cutting chambers. The baffles may pivot between an open position for the grass clippings to be discharged or collected, a closed position for the grass clippings to be mulched, and one or more intermediate positions for some of the clippings to be discharged or collected, and the remainder to be mulched.