Mower Deck Rocker Suspension for Uniform Cutting on Uneven Ground
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Solution Overview
Problem
Mower decks with traditional front and rear rollers struggle to maintain a uniform cut when traversing uneven terrain, leading to scalping or uneven cutting due to vertical displacement of the cutting unit.
Innovation Solution
A rocker suspension system with opposing rocker members coupled via a pivot point, allowing the front and rear rollers to rotate relative to a support assembly, minimizing vertical displacement of the cutting unit over bumps and dips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional front and rear rollers are used to support the mower deck, then the structure is simple and easy to manufacture, but the cutting unit experiences vertical displacement on uneven terrain causing scalping and uneven cuts
Solution Approach 1:
The patent applies the dynamics principle by replacing the static roller support with a dynamic rocker suspension system. The rocker members are designed to rotate about pivot points, allowing the mower deck to dynamically adapt to uneven terrain. This rotation capability enables the cutting unit to maintain consistent height despite ground variations, resolving the contradiction between cutting uniformity and structural simplicity.
Solution Approach 2:
The patent segments the support structure into multiple independent rocker members (front rocker member and rear rocker member) that can rotate independently about their respective pivot points. This segmentation allows each section of the mower deck to respond independently to terrain variations, improving cutting uniformity while maintaining manageable structural complexity through modular design.
2Adaptability or versatility
If the mower deck uses a fixed support structure, then the design is simple, but the cutting unit cannot adapt to bumps and dips in the terrain
Solution Approach 1:
The rocker suspension system introduces dynamic adaptability through rotational degrees of freedom. Each rocker member can rotate about its pivot point to accommodate terrain variations, enabling the cutting unit to adapt to bumps and dips. This dynamic mechanism provides terrain adaptation while keeping the suspension structure relatively simple through the use of basic pivot connections.
3Manufacturing precision
If the rocker members are coupled rigidly to the support assembly, then the structure is stable, but vertical displacement occurs on uneven ground
Solution Approach 1:
The patent resolves the stability-consistency contradiction by introducing controlled rotational movement through pivot points. The rocker members are not rigidly coupled but are instead pinned to allow rotation. This dynamic connection maintains cutting height consistency by enabling adaptation to terrain variations while preserving overall deck stability through the constrained rotational motion about fixed pivot points.
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
The rocker suspension system ensures a more uniform cut by reducing the vertical displacement of the cutting unit, smoothing transitions over uneven ground, and minimizing scalping or uneven cutting.
Implementation Method 1
Each of the opposing rocker members may be configured to rotate relative to the support assembly at the respective pivot point
Data Source
AI summary
A mower deck can include a rocker suspension that enables a more uniform cut even when the ground is bumpy. The rocker suspension can include opposing rocker members that are coupled to a support assembly via a pivot point. The opposing rocker members can support front and rear rollers or other rolling mechanisms. When the front or rear rollers encounter a bump, the rocker members can rotate around the pivot point to minimize the vertical displacement of a cutting unit. The front and/or rear rollers may be part of a roller assembly that forms a secondary rocker suspension.