Adjustable Hitch Assembly with Monolithic Bracket
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Solution Overview
Problem
Existing ball and socket type hitch apparatuses lack adjustability and security, particularly in terms of vertical positioning and load distribution, which affects their ability to handle varying trailer weights and orientations without deflection or theft.
Innovation Solution
An adjustable hitch assembly comprising a monolithic aluminum hitch bracket with a vertically-adjustable hitch-ball mounting block and interchangeable hitch balls, allowing for a range of vertical adjustments and secure mounting through pinning, utilizing a wedge-shaped gusset-form enlargement and C-shaped block design for enhanced stability and theft resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing ball and socket type hitch apparatuses are used, then the structure is simple, but the vertical positioning adjustability is limited
Solution Approach 1:
The hitch assembly incorporates a vertically-adjustable mounting block that can be positioned at multiple heights along the receiver tube, transforming a static hitch into a dynamically adjustable system. This allows the hitch ball to be vertically repositioned to accommodate different trailer configurations while maintaining structural integrity through a controlled adjustment mechanism with discrete positioning options.
Solution Approach 2:
The mounting block is divided into multiple selectable vertical positions along the receiver tube, with each position providing a stable mounting point. This segmentation of the vertical adjustment range into discrete positions enables adaptability without requiring a completely continuous and complex adjustment mechanism, balancing versatility with structural simplicity.
2Reliability
If existing hitch apparatuses are used, then the manufacturing is simple, but the security against theft is insufficient
Solution Approach 1:
The hitch assembly employs a nested structure where the mounting block fits within the receiver tube, and the hitch ball mounts within the mounting block. This nested arrangement creates multiple layers of mechanical interference and fitting, providing theft resistance through the difficulty of disassembly without proper tools, while the nested components can be manufactured using standard machining processes.
Solution Approach 2:
The hitch assembly incorporates asymmetric features in the mounting block and receiver tube interface, including non-uniform positioning holes and asymmetric locking mechanisms. These asymmetric elements prevent unauthorized removal and provide theft resistance, while being manufacturable through conventional asymmetric machining and forming operations.
3Adaptability or versatility
If existing hitch apparatuses are used, then the components are fixed, but the ability to handle varying trailer weights and orientations is limited
Solution Approach 1:
The vertically-adjustable mounting block enables dynamic repositioning of the hitch ball to optimize load distribution for different trailer weights and orientations. This dynamic adjustment capability allows the system to adapt to varying operational conditions without requiring multiple separate hitch assemblies, balancing versatility with manageable complexity through a single integrated adjustment mechanism.
4Strength
If a monolithic aluminum hitch bracket with vertically-adjustable mounting block is used, then the strength and stability are improved, but the weight of the hitch assembly increases
Solution Approach 1:
The hitch assembly utilizes a monolithic aluminum construction for the bracket and mounting block, leveraging aluminum's high strength-to-weight ratio. This composite aluminum structure provides the necessary load-bearing capacity and rigidity to handle heavy trailers while minimizing the overall weight of the hitch assembly compared to traditional steel constructions, achieving an optimal balance between strength and weight.
Data Source
AI summary
An adjustable hitch assembly has a hitch bracket, a vertically-adjustable hitch-ball mounting block, one or more hitch balls, and assorted other hardware including a plurality of hitch pins. The hitch bracket has essentially an L-shape and has a drawbar portion having an inside sidewall, a post portion having an inside sidewall and a wedge-shaped, gusset-form enlargement having an inside sidewall which transitions into the inside sidewalls respectively of the post portion and drawbar portion, filling in the inside angle between the drawbar portion and post portion. Wherein the vertically-adjustable hitch-ball mounting block is vertically adjustable on the post portion of the hitch bracket.