Unitary Door Knuckle Hinge Structure for Utility Vehicles
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Solution Overview
Problem
Conventional utility vehicles lack effective door assemblies that can securely pivot and protect occupants during rollover situations or significant lateral inclines, often requiring separate hinge elements that increase weight, assembly time, and cost.
Innovation Solution
The integration of a unitary knuckle structure with a door, featuring a bore and bushing, pivotally coupled with a bracket via a male hinge member, allows the door to pivot between closed and open positions, reducing weight and assembly complexity while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional door hinge structures are used in utility vehicles, then the door can be pivotally coupled with the frame, but the structure becomes heavy and costly while compromising durability and safety during rollover situations
Solution Approach 1:
The knuckle and door are integrally formed as a unitary structure, eliminating the need for separate attachment components. This merging reduces the overall weight of the hinge assembly while maintaining structural integrity and durability during rollover events
Solution Approach 2:
The hinge structure utilizes a bushing component positioned within the knuckle bore, creating a composite assembly that combines different materials to achieve both lightweight properties and enhanced durability for reliable door operation during safety-critical events
2Ease of manufacture
If conventional door hinge structures are used in utility vehicles, then the door can be pivotally coupled with the frame, but the manufacturing cost and assembly time increase
Solution Approach 1:
The integral formation of the knuckle with the door as a unitary structure reduces the number of parts and assembly steps, lowering manufacturing costs and assembly time while ensuring consistent quality and reliability of door operation
Solution Approach 2:
The knuckle is pre-formed as an integral part of the door during door manufacturing, rather than being assembled separately. This preliminary action reduces subsequent assembly complexity and ensures reliable hinge operation from the outset
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
This configuration enhances the door's pivotability and structural strength, reducing wear and improving safety during rollover or incline events while minimizing weight and assembly time, thus addressing the limitations of conventional door assemblies.
Implementation Method 1
The bushing defines a hinge aperture and a hinge axis. At least a substantial portion of the bushing is positioned within the bore defined by a respective one of the knuckles
Implementation Method 2
the male hinge member extends through the hinge aperture defined by the bushing and pivotally couples the knuckle with the bracket, such that the door is pivotable between a closed position and an open position about the hinge axis
Data Source
AI summary
A vehicular door assembly includes a door and at least one hinge structure. Each of the at least one hinge structure includes a knuckle and a bushing. The knuckle extends away from the door. The door and the knuckle of each of the at least one hinge structure are integrally formed as a unitary structure. The knuckle of each of the at least one hinge structure includes an upper surface and a lower surface, and defines a bore extending through the knuckle and opening onto each of the upper surface and the lower surface. The bushing defines a hinge aperture and a hinge axis. At least a substantial portion of the bushing is positioned within the bore defined by a respective one of the knuckles. Each of the at least one hinge structure is configured for coupling with a frame of a vehicle. Vehicles are also provided.