Pivotable Undercutting Knives for Root Ball Adaptation

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Solution Overview

Problem

Existing root ball undercutting and lifting devices are large, heavy, and inflexible, requiring significant resources and labor to adjust for different plant sizes and shapes, and are not easily adaptable to various carrier vehicles.

Innovation Solution

A root ball undercutting device with pivotably mounted undercutting knives about two horizontal axes, allowing for semi-automatic adjustment and easy adaptation to different root ball sizes and shapes, featuring a simple and robust design with interchangeable knives and a compact structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the undercutting knives are dimensioned for maximum performance, then the device can handle large root balls, but the device becomes large and heavy requiring a large carrier vehicle and larger area operation

Engineering Contradiction:
Improvemaximum performance for large root ballsVSAvoiddevice size and weight
Core Design Contradiction:
ProductivityVSWeight of moving object

Solution Approach 1:

The undercutting knives are made pivotable about two horizontal axes, allowing dynamic adjustment of the knife position and orientation. This enables a single device to adapt to different root ball sizes by changing the knife configuration rather than requiring multiple fixed-size devices

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The device allows changing operational parameters (knife position, angle, and configuration) to match different root ball dimensions. The semi-automatic adjustment system modifies these parameters based on the selected root ball size, enabling one device to perform multiple sizes effectively

Inventive Principle:
Principle #35Parameter changes

2Adaptability or versatility

If the device is designed for universal use with different carrier vehicles, then adaptability improves, but device complexity and conversion work increase

Engineering Contradiction:
Improveadaptability to different carrier vehiclesVSAvoidconversion work and complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The device is designed with a standardized mounting system that can be universally attached to different carrier vehicles without requiring vehicle-specific modifications. The pivotable knife mechanism serves multiple functions for different root ball types, reducing the need for specialized configurations

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

3Adaptability or versatility

If adjustable mechanisms are added to change knife position, then adaptability to different root ball sizes improves, but device complexity and failure risk increase

Engineering Contradiction:
Improveadjustment to different ball sizesVSAvoidconstruction complexity and failure risk
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The dual-pivot mechanism allows the undercutting knife to be dynamically repositioned through controlled movement about two horizontal axes. This dynamic adjustment system replaces complex interchangeable parts with a streamlined mechanism that reduces failure points while maintaining adaptability

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The two pivot axes are integrated into a unified mounting structure that combines position adjustment and angle adjustment functions. This merging of adjustment functions into a single integrated system reduces the number of separate components and potential failure points compared to multiple independent adjustment mechanisms

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentEP3557977B1Device for undercutting and removing root balls
Publication Date: 2021.07.07 ELSEN FREDDY
  • EP3557977B1 patent drawingFigure 1~2
  • EP3557977B1 patent drawingFigure 3~4
  • EP3557977B1 patent drawingFigure 5~6

AI summary

The invention relates to a device (1) for undercutting and removing root balls, comprising at least one undercutting blade (11, 21) that is mounted to pivot about a first pivot axis A, A" in a pivot bearing receiving portion (12, 22), wherein the position of said pivot bearing receiving portion (12, 22) can be altered and the at least one undercutting blade (11, 21) is mounted adjacently to said pivot bearing receiving portion (12, 22) such that it can pivot about a second pivot axis B, B".