Gauge Wheel Placement for Sloped Reel Mower Turf Protection

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Solution Overview

Problem

Reel mower cutting units leave marks and cause damage to turf when lowered onto sloped surfaces due to initial contact and sideways sliding during the lowering process.

Innovation Solution

Incorporation of gauge wheels with axes fixed non-parallel to the cutting reel, positioned forward of the front roller, which are raised off the ground once the unit is supported by the rollers to prevent initial contact marks and sliding damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the reel mower cutting unit is lowered directly onto a sloped surface, then the unit can be positioned on the slope, but marks and damage are caused to the turf due to initial contact and sideways sliding

Engineering Contradiction:
ImprovePositioning capability on sloped surfacesVSAvoidTurf marks and damage
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The gauge wheels perform a preliminary action by contacting the sloped surface first during the lowering process. This initial contact establishes a stable reference point that prevents the main cutting unit from directly marking or damaging the turf. The gauge wheels prepare the positioning sequence in advance, allowing the unit to descend in a controlled manner without causing harm to the ground surface.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The gauge wheels act as intermediary elements between the reel mower cutting unit and the sloped surface. Rather than the main cutting unit contacting the ground first, the gauge wheels serve as intermediate contact points that mediate the lowering process. These wheels transfer the initial ground contact function away from the cutting components, preventing them from causing turf damage while still enabling proper positioning on slopes.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If gauge wheels are added to prevent turf damage, then turf integrity is maintained, but device complexity increases

Engineering Contradiction:
ImproveTurf marks and damageVSAvoidNumber of ground-engaging components
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The gauge wheels are designed with multi-functionality to justify their addition to the system. Beyond their primary function of preventing turf marks during lowering, they also serve as positioning references, stability anchors on sloped surfaces, and protective elements for the main cutting unit. This universal application of the gauge wheels across multiple functions maximizes their utility while minimizing the need for additional separate components.

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

Data Source

PatentEP2361493B1Reel mower cutting unit
Publication Date: 2013.03.06 DEERE & CO
  • EP2361493B1 patent drawingFigure 1
  • EP2361493B1 patent drawingFigure 2~3

AI summary

A reel mower cutting unit (100) having a cutting reel (112) with a horizontal axis is supported by a front roller (102) and a rear roller (104) in a mowing position. A lift arm may raise and lower the cutting reel (112) between a mowing position and a transport position. A pair of gauge wheels (116) is mounted forwardly of the front roller (102) at a front left corner and a right front corner of the unit (100). If the unit (100) is lowered to a sloped surface, the gauge wheel (116) contacts the surface and prevents the unit (100) from marking or damaging the turf.