Movable Hitch Point Using Tensioned Members for Low-Ground Towing
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Solution Overview
Problem
Conventional hitch systems, especially on off-road vehicles, face challenges with real hitch points being unable to be positioned low to the ground due to ground contact issues and mobility reduction, while virtual hitch points can move to desirable locations but may shift to less desirable positions as the linkage articulates.
Innovation Solution
A vehicle-to-implement hitch system utilizing flexible tensioning members to create a movable hitch point, deployable from a stowed to a deployed configuration, with actuators and flexible elements forming a pseudo-rigid structure that can re-form after obstacles, allowing the hitch point to be positioned low to the ground and tolerant of ground contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a real hitch point is positioned low to the ground, then the hitch can be positioned in a desirable location, but the hitch may come into contact with the ground causing damage and reducing vehicle mobility
Solution Approach 1:
The patent applies dynamics by making the hitch point movable rather than fixed. The hitch point can dynamically adjust its position between a low operational position (when equipment is attached) and a retracted position (when equipment is detached or ground contact is detected), allowing the system to adapt to different conditions and avoid ground contact damage
Solution Approach 2:
The patent introduces an intermediary mechanism (the movable hitch point system with tensioning members and positioning mechanism) between the vehicle and the equipment. This intermediary allows the hitch point to be positioned low when needed while providing protection through its ability to move and retract, preventing direct ground contact damage
2Reliability
If a virtual hitch point is used to position the hitch high above ground, then vehicle mobility is maintained, but the hitch point moves to less desirable locations as the linkage articulates
Solution Approach 1:
The patent employs feedback mechanisms including position sensors that detect the hitch point location and tensioning members that respond to load conditions. This feedback allows the system to actively maintain the hitch point at the desired low position by adjusting the linkage geometry in response to detected position or load changes
Solution Approach 2:
The patent replaces the traditional rigid mechanical linkage with a more sophisticated system incorporating tensioning members (such as cables or springs) and active positioning mechanisms. This substitution allows for greater flexibility in maintaining the virtual hitch point at a fixed desirable location while accommodating vehicle motion and articulation
3Adaptability or versatility
If a movable hitch point is created using flexible tensioning members, then the hitch can be positioned in previously unoccupied space, but the structure requires actuators and complex deployment mechanisms
Solution Approach 1:
The patent utilizes dynamics by employing flexible tensioning members that can transition between relaxed and taut states, allowing the hitch point to be created in three-dimensional space. The system dynamically adjusts the tensioning member lengths using actuators to position the hitch point at desired locations while maintaining structural integrity when needed
Data Source
AI summary
A vehicle-to-implement hitch is provided and comprises a force transfer hitch connector adapted to provide a hitch point to which an implement can be connected. The connector is couplable to the vehicle by one or more flexible tensioning members which are, or can be moved so as to be, taut whereby to create a rigid structure comprising a hitch location such that the hitch point is movable.