Offset Implement Hitch Linkage for Safe Side Towing on Slopes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing offset hitch systems for towing implements, such as rotary mowers, often require complex arrangements and can be hazardous when towing on steep slopes, as they typically require the tractor to travel on the slope, limiting maneuverability and safety.
Innovation Solution
An offset towing apparatus with a rear wheel axis perpendicular to the travel direction, featuring a tow arm pivotally attached to both the towing vehicle and the implement, supported by a beam on caster wheels, and an actuator that allows the tow arm to pivot relative to the beam, enabling easy adjustment of the towing path by extending or retracting the actuator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the implement is towed directly behind the tractor, then the connection is simple and stable, but the implement cannot be towed offset to either side of the tractor
Solution Approach 1:
The hitch structure is divided into multiple independent segments: a beam with caster wheels, a tow arm that pivots relative to the beam, and an implement hitch at the end of the tow arm. This segmentation allows each component to perform a specific function while enabling overall adaptability for offset towing to either side of the tractor.
Solution Approach 2:
The tow arm is designed to pivot dynamically relative to the beam through a pivot axis, allowing the implement to be positioned at various offset angles. The caster wheels on the beam provide dynamic directional adjustment capability, enabling the system to adapt to different towing paths while maintaining structural integrity.
2Ease of operation
If a rigid connection is used between the implement and towing vehicle, then the connection is stable, but the maneuverability on steep slopes is limited
Solution Approach 1:
The beam with caster wheels acts as an intermediary between the tow arm and the ground, providing a stable yet maneuverable connection. The caster wheels allow the beam to rotate freely, enabling easy directional changes on steep slopes while the rigid tow arm maintains stable connection between the implement and the beam.
Solution Approach 2:
The caster wheels on the beam automatically adjust to the terrain and directional changes without requiring active control, providing self-adjusting maneuverability. The pivot joint between the tow arm and beam allows automatic adaptation to slope changes while maintaining connection stability.
3Adaptability or versatility
If the tow arm is fixed relative to the beam, then the structure is simple, but the implement cannot be positioned at varying offset angles
Solution Approach 1:
The tow arm is designed with a pivot joint relative to the beam, transforming it from a fixed to a dynamic connection. This allows the tow arm to rotate and position the implement at various offset angles while the beam's caster wheels provide additional directional flexibility, achieving versatile offset positioning.
4Object-affected harmful factors
If the tractor travels on the slope of the ditch to tow the implement behind it, then the towing path is straightforward, but the travel path becomes hazardous
Solution Approach 1:
The offset hitch apparatus with caster wheels and pivotable tow arm serves as an intermediary system that decouples the tractor's travel path from the implement's working position. The tractor can travel on safe, level ground while the implement is positioned offset over the ditch through the flexible connection provided by the beam, caster wheels, and pivot joint.
Data Source
AI summary
An offset towing apparatus for an implement supported by rear wheels rotating about an axis perpendicular to the operating travel direction. A tow arm connects between a vertical towing pivot axis at the towing vehicle and a vertical implement pivot axis at the implement hitch. A middle portion of the tow arm is pivotally attached about a vertical beam pivot to a beam on castor wheels. A strut attached to the implement pivot axis extends laterally and a bar is attached to the strut about a strut pivot axis and extends forward parallel to the tow arm to a front end attached to the beam about a bar pivot axis. The tow arm, the beam, the strut, and the bar form a parallel linkage between the beam pivot axis, the implement pivot axis, the strut pivot axis and the bar pivot axis allowing the implement to pivot to either side.