Spherical Fifth Wheel Hitch Coupling on Uneven Terrain
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Solution Overview
Problem
Current fifth wheel hitch systems require precise alignment of the king pin and coupling device, limiting their use on uneven terrain and being unsuitable for recreational use due to bulky and expensive modifications, making them inconvenient for average consumers.
Innovation Solution
A fifth wheel hitch system with a pyramid-shaped base and a modified king pin encased in a spherical mounting ball, allowing coupling and uncoupling regardless of the angular relationship between the trailer and towing vehicle, using materials like aluminum alloy and steel for durability and weight reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional fifth wheel hitch systems are used with precise alignment requirements, then coupling strength and stability are improved, but ease of operation and adaptability to various terrains deteriorate
Solution Approach 1:
The patent applies spheroidality by replacing the traditional cylindrical king pin with a spherical mounting ball that fits into a spherical receiving feature. This spherical geometry allows the trailer to be coupled to the towing vehicle from multiple angular positions, eliminating the need for precise alignment while maintaining secure coupling. The spherical interface enables rotational freedom during the coupling process, making operation significantly easier on various terrains.
Solution Approach 2:
The patent changes the geometric parameters of the coupling interface from a fixed cylindrical shape to a spherical shape. This parameter change allows the coupling mechanism to accommodate varying angular relationships between the trailer and towing vehicle, transforming the coupling process from a precision alignment task to a more forgiving operation that can be performed on uneven terrain.
2Adaptability or versatility
If traditional fifth wheel hitch systems are modified for recreational use, then coupling versatility is improved, but device complexity and cost increase
Solution Approach 1:
The patent segments the coupling system into two main components: a spherical mounting ball attached to the trailer's king pin, and a spherical receiving feature integrated into the base member. This segmentation allows the spherical coupling mechanism to be added to existing trailers without modifying the towing vehicle, reducing overall system complexity while improving versatility.
Solution Approach 2:
The spherical mounting ball and receiving feature create a universal coupling interface that can accommodate various angular relationships and terrain conditions. This single spherical interface design provides multi-functional capability, replacing the need for multiple specialized alignment mechanisms and reducing overall system complexity.
3Strength
If traditional fifth wheel hitch systems are used with heavy equipment, then coupling strength is improved, but weight of the system increases
Solution Approach 1:
The spherical mounting ball and receiving feature create a compact, efficient coupling interface that achieves strong mechanical engagement without requiring heavy-duty components. The spherical geometry distributes loads more effectively than traditional cylindrical designs, allowing for lighter overall system weight while maintaining adequate coupling strength for recreational towing applications.
Data Source
AI summary
A precision, light weight, high strength hitch for coupling a trailer or other vehicle to a towing vehicle. The hitch includes a mounting ball attached to a portion of the trailer or other vehicle and a ball socket attached to the towing vehicle. The mounting ball and the ball socket have compatible surfaces that permit seating of the two components regardless of the axial, transverse or longitudinal angular or rotational orientation of the two vehicles.