Pendulum Hoe Orientation for Adaptive Mechanical Weeding

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Solution Overview

Problem

Existing mechanical methods for weed control and soil cultivation are inefficient in handling diverse environmental conditions and require complex mechanisms.

Innovation Solution

A pendulum hoe with a hoe blade on a pendulum suspension, oriented in a fixed direction and capable of pendulum-like movement, is designed to plunge into the ground at a right angle transverse to the direction of travel, allowing for a helical path and adjustable working plane, equipped with sensors and a control unit for optimal operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If existing mechanical methods for weed control are used, then mechanical soil cultivation can be performed, but the methods are inefficient in handling diverse environmental conditions and require complex mechanisms

Engineering Contradiction:
Improvehandling diverse environmental conditionsVSAvoidmechanism complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The pendulum hoe employs dynamic motion where the hoe blade oscillates back and forth in a pendulum-like movement while the device moves forward. This dynamic operation allows the blade to adapt to varying soil conditions automatically through its oscillating motion, eliminating the need for complex adjustment mechanisms while maintaining versatility across different environmental conditions

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The invention changes the operational parameters by implementing a pendulum-like oscillating motion with variable amplitude and frequency. The hoe blade's back-and-forth movement creates varying penetration depths and soil interaction forces, enabling effective weed control across diverse soil types and environmental conditions without requiring complex mechanical adjustments

Inventive Principle:
Principle #35Parameter changes

2Productivity

If a pendulum hoe with pendulum-like movement is implemented, then soil loosening and weed destruction effectiveness is improved, but the mechanism complexity increases

Engineering Contradiction:
Improvesoil loosening and weed destruction effectivenessVSAvoidpendulum mechanism complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The pendulum hoe utilizes mechanical vibration through its oscillating pendulum-like motion. The hoe blade vibrates back and forth during operation, creating enhanced soil loosening and weed destruction effectiveness. This vibrational mechanism achieves superior productivity while maintaining relatively simple construction compared to other vibration-based solutions

Inventive Principle:
Principle #18Mechanical vibration

Solution Approach 2:

The invention implements periodic action through the pendulum-like oscillating motion of the hoe blade. The blade performs repeated back-and-forth movements at regular intervals, creating periodic soil penetration and weed destruction cycles. This periodic operation significantly enhances productivity while avoiding the need for complex continuous adjustment mechanisms

Inventive Principle:
Principle #19Periodic action

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 pendulum hoe effectively loosens soil and destroys weeds across various soil types while maintaining robustness and adaptability, with sensor-assisted control for optimal performance in challenging conditions.

Implementation Method 1

a hoe blade (3) arranged on a pendulum suspension (4) of a pendulum arm (2), which can be oscillated within limits about a pendulum axis (5)

Methodology Applied
Scientific EffectPendulum motion: Pendulum

Implementation Method 2

With a spring-loaded hoe blade, a spring force counteracts any deflection

Methodology Applied
Scientific EffectSpring force: Spring

Implementation Method 3

Without such a spring, the hoe blade can be deflected without counter-pressure, apart from the restoring force of gravity

Methodology Applied
Scientific EffectGravity: Gravitation

Data Source

PatentEP4466967B1Pendulum hoe and robot vehicle with pendulum hoe
Publication Date: 2026.02.04 ZAUBERZEUG GMBH
  • EP4466967B1 patent drawingFigure 1
  • EP4466967B1 patent drawingFigure 2
  • EP4466967B1 patent drawingFigure 3

AI summary

The invention relates to a pendulum hoe (1) and an arrangement comprising a robot and a pendulum hoe (1) for mechanical soil cultivation, in particular for loosening the soil and/or destroying weeds, wherein the pendulum hoe (1) has a hoe blade (3) arranged on a pendulum suspension (4) of a pendulum arm (2) and which is pendulum-movable about a pendulum axis (5) within limits. According to the invention, the pendulum hoe (1) is mounted in a fixed orientation on a mechanical device for movement, wherein the pendulum arm (2) has a substantially fixed angle both to a direction of movement (15) of the pendulum hoe (1) and transversely to the direction of movement (15), and wherein the pendulum axis (5) is arranged to be mechanically lowered at an angle constant to the direction of movement (15) and at a right angle transversely to the direction of movement (15).