Fifth Wheel Hitch Mounting With Anti-Rattle Vertical Adjustment
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Solution Overview
Problem
Current fifth wheel hitches lack operator feedback, are prone to noise and discomfort, and are not easily transferable to different towing vehicles due to non-standard under-bed structures, limiting their flexibility and usability.
Innovation Solution
A fifth wheel hitch system with clear operator controls, anti-rattle components, adjustable fittings, and a universal mounting apparatus that includes a vertically adjustable attachment member with cam and T-pin assemblies, and pivot bushings to reduce rattling and enhance compatibility with various towing vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fifth wheel hitch is designed with fixed mounting for stability, then connection reliability is improved, but adaptability to different towing vehicles deteriorates
Solution Approach 1:
The mounting system incorporates vertically adjustable attachment members with cam assemblies and T-pin assemblies that allow dynamic adjustment of the hitch position. The cam assembly enables minute vertical adjustments through rotational movement, while the T-pin assembly allows positioning at different vertical locations along the mounting slot, transforming a static mounting system into a dynamic one that adapts to different vehicle configurations while maintaining secure connection.
Solution Approach 2:
The system changes the vertical position parameter of the attachment member relative to the mounting rail through adjustable mechanisms. The cam assembly modifies the vertical position through cam lobes that convert rotational motion into vertical displacement, while the T-pin assembly allows selection of different vertical positions along the mounting slot, enabling the same hitch to adapt to different towing vehicle configurations by changing its vertical position parameter.
2Ease of operation
If operator feedback mechanisms are added to improve usability, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The cam assembly provides tactile feedback to the operator through its mechanical engagement mechanism. As the cam lobe rotates and engages with the mounting slot, the operator can feel the engagement points and the degree of engagement, providing immediate feedback about the attachment state without requiring visual inspection or additional sensors.
Solution Approach 2:
The T-pin assembly with shouldered configuration provides self-aligning functionality where the shoulders on the T-pin automatically engage with the mounting slot geometry, guiding the operator into the correct positioning without requiring precise alignment or complex adjustment mechanisms. The system serves itself by using the geometry of the components to provide alignment and engagement feedback.
3Object-affected harmful factors
If anti-rattle components are added to reduce noise, then comfort is improved, but device complexity increases
Solution Approach 1:
The cam assembly is designed with cam lobes that maintain continuous contact with the mounting slot throughout the rotation cycle, providing beforehand cushioning by ensuring the attachment member remains firmly engaged before any rattling or loose movement can occur. The geometry of the cam lobes is designed to maintain positive engagement and eliminate gaps that could allow rattling.
Solution Approach 2:
The T-pin assembly combines different material properties and geometric features (shouldered configuration, threaded portions, integrated fasteners) to create a composite structure that simultaneously provides rigid engagement to prevent rattling while allowing for adjustment. The integration of multiple functional elements into a single composite component achieves noise reduction without proportionally increasing overall device complexity.
4Manufacturing precision
If vertically adjustable attachment members are added to improve positioning precision, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The mounting slot is pre-configured with specific geometric features and the cam assembly is pre-designed with lobes that engage at predetermined vertical positions. This preliminary action of pre-configuring the engagement geometry allows for precise vertical positioning to be achieved through simple rotational movement of the cam, rather than requiring complex adjustment mechanisms during installation.
Solution Approach 2:
The cam lobe geometry utilizes curved surfaces that convert rotational movement into precise vertical displacement through the cam mechanism. The curved profile of the cam lobes is designed to provide smooth, controlled vertical positioning as the cam rotates, enabling minute adjustments through continuous rotational motion rather than discrete positioning steps.
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 system provides improved comfort and ease of use for operators by eliminating noise, allowing minute adjustments for precise positioning, and accommodating a wide range of towing vehicles, thus enhancing the overall towing experience.
Implementation Method 1
a cam lever having a cam barrel rotatable in response to movement of the cam lever and wherein the attachment bolt passes through the cam barrel
Implementation Method 2
pivot bushing configured to selectively and adjustably engage the first frame member with the second frame member
Data Source
AI summary
A fifth wheel hitch assembly for mounting to a towing vehicle and receiving a kingpin of a trailer incorporating a comfort assembly is provided. The fifth wheel hitch assembly may comprise a kingpin receiving assembly attached to a mounting rail via a comfort assembly. The comfort assembly may include one or more pivot bushing assemblies, as well as vertically adjustable, anti-rattle attachment systems. These attachment systems may include a cam assembly and/or a T-pin assembly.