Mower Deck Mulch Gate and Baffle Conversion Mechanism

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Solution Overview

Problem

Existing multi-blade mower decks with mulch/side discharge conversion require complex installations, numerous parts, and are costly, failing to provide quick and efficient switching between mulching and side discharge positions.

Innovation Solution

A multi-blade mower deck design featuring a mulch gate and adjacent baffle under the deck, easily convertible between mulching and side discharge positions using a handle, with fewer parts and lower costs, allowing for quick installation and removal, and effective grass clipping management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If existing multi-blade mower decks with mulch/side discharge conversion are designed as kits or original equipment, then mulching and side discharge capabilities are provided, but the installation is complex, requires numerous parts, and is costly

Engineering Contradiction:
Improvemulching and side discharge capabilitiesVSAvoidinstallation complexity and number of parts
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines the mulching and side discharge functions into a single integrated mower deck system. The mulch gate and baffle are positioned adjacent to each other, forming a unified structure that can be quickly installed as a kit. This merging of functions into one system reduces the number of separate components and simplifies installation compared to existing separate kits or original equipment designs.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The mower deck is divided into functional segments: the mulch gate for controlling mulching mode, the baffle for side discharge control, and the handle for operation. This segmentation allows each component to be optimized independently while simplifying the overall installation process. The segmented design enables quick assembly as a kit without requiring complex installation procedures.

Inventive Principle:
Principle #1Segmentation

2Adaptability or versatility

If existing multi-blade mower decks with mulch/side discharge conversion use hinged baffles, then conversion between positions is possible, but the conversion process is not quick and easy

Engineering Contradiction:
Improveconversion between mulching and side discharge positionsVSAvoidtime for installation and removal
Core Design Contradiction:
Adaptability or versatilityVSLoss of time

Solution Approach 1:

The mulch gate and baffle are designed as movable components that can be quickly positioned between mulching and side discharge modes. The handle enables dynamic adjustment of these components, allowing operators to switch between functions rapidly. This dynamic design facilitates quick conversion without the time-consuming installation and removal processes of existing hinged baffle systems.

Inventive Principle:
Principle #15Dynamics

3Adaptability or versatility

If existing multi-blade mower decks with mulch/side discharge conversion are designed with multiple components, then functional capabilities are achieved, but the cost is high

Engineering Contradiction:
Improveside discharge and mulching capabilitiesVSAvoidmanufacturing cost
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The mower deck design integrates multiple functions into universal components. The mulch gate and baffle structure serves both mulching and side discharge functions, eliminating the need for separate specialized components. This multi-functionality reduces the total number of parts required, lowering manufacturing costs while maintaining full functional capability for both side discharge and mulching operations.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The design employs simpler, more cost-effective materials and construction methods for the mulch gate and baffle components. By using straightforward structural elements rather than complex hinged mechanisms, the manufacturing cost is reduced. The components are designed to be economical to produce while achieving the required functional performance for mulching and side discharge conversion.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS9485911B2Multi-blade mower deck with mulch/side discharge conversion
Publication Date: 2016.11.08 DEERE & CO
  • US9485911B2 patent drawing
  • US9485911B2 patent drawing
  • US9485911B2 patent drawing

AI summary

A multi-blade mower deck with mulch/side discharge conversion includes a mulch gate mounted under the mower deck and connected to a vertical hinge under the mower deck. The mulch gate extends to the right and rearwardly around a portion of a perimeter of the right cutting chamber. A mulch gate lever on top of the mower deck is connected to the vertical hinge and pivots the mulch gate between the mulching position and a side discharge position. A baffle is removably attached under the mower deck and blocks a portion of a flow passage through the side skirt at the right of the right cutting chamber.