Lift-off Door Hinge Stamped Bracket Alignment

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Solution Overview

Problem

Current vehicle door hinges are inefficient due to high component costs, assembly time, and structural integrity issues, particularly with stamped hinges that compromise strength or dimensional integrity, and existing lift-off hinges that require numerous fasteners and do not maintain the main pivot intact during door removal.

Innovation Solution

A vehicle door attachment unit with a bodyside and doorside bracket system that uses stamped sheet metal components, featuring a retaining mechanism with angular seats and chamfered rims for alignment, and a locating pin with translational freedom, allowing for efficient detachment and reattachment of vehicle doors while maintaining structural integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If stamped hinges are used to reduce cost, then manufacturing cost is reduced, but hinge strength and dimensional integrity are compromised

Engineering Contradiction:

Improvemanufacturing costVSAvoidhinge strength

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The patent combines the hinge body and mounting bracket into a single integrated stamped component, eliminating the need for separate parts and fasteners. This integration maintains strength by creating a unified structural element while reducing manufacturing cost through single-piece stamping processes.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The hinge is designed with separable functional zones within the single stamped piece - a pivot section for rotation and a bracket section for mounting, allowing the door to be detached by removing only the mounting fasteners while the hinge body remains intact.

Inventive Principle:

Principle #1Segmentation

2Strength

If profile or forged lift-off hinges are used, then hinge strength is improved, but manufacturing cost increases

Engineering Contradiction:

Improvehinge strengthVSAvoidmanufacturing cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent employs a cost-effective stamped hinge that is designed for temporary disassembly during door removal, then reassembly for continued use. The hinge body itself is not discarded but the mounting fasteners are removed and reinstalled, achieving lift-off functionality with economical stamped materials.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Strength

If multiple fasteners are used to attach door mounting plate, then structural integrity is improved, but assembly time and component cost increase

Engineering Contradiction:

Improvestructural integrityVSAvoidassembly time

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

Multiple fastener holes are integrated into a single bracket component, allowing multiple attachment points to be created in one stamping operation. The door mounting plate is designed as one piece with all necessary fastener receptacles, reducing assembly steps while maintaining structural integrity through multiple attachment points.

Inventive Principle:

Principle #5Merging (Combining)

4Stability of the object's composition

If intertwining projections are used to hold door in fixed position, then door positioning is improved, but component fatigue and noise increase

Engineering Contradiction:

Improvedoor positioning stabilityVSAvoidcomponent reliability

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent extracts the door positioning function from the hinge mechanism itself and places it in a separate door stop component. This allows the hinge to focus on rotation while the door stop independently manages door position, eliminating the scraping and fatigue issues caused by intertwining projections.

Inventive Principle:

Principle #2Taking out (Extraction)

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 solution provides a durable, cost-effective, and efficient hinge system that minimizes assembly time and component costs by allowing easy detachment and reattachment of vehicle doors without compromising structural integrity, using stamped sheet metal components and a minimal number of joints.

Implementation Method 1

A bearing may be disposed on the retaining mechanism for providing rotational freedom between the retaining mechanism, and the bodyside or doorside bracket

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS8156611B2Lift-off door hinge

Publication Date: 2012.04.17 FORD GLOBAL TECH LLC

AI summary

A vehicle door attachment unit for rotatably and detachably coupling a vehicle door to a vehicle body. The unit may include a bodyside bracket mountable to the vehicle body and having first and second portions with respective first and second apertures, with the first and second portions extending generally away from the vehicle body. A doorside bracket may be mountable to the vehicle door and include a segment with a third aperture, the segment extending generally away from the vehicle door. A retaining mechanism may extend through the third aperture, and through the first and/or second apertures. A fastener may extend through at least one of the apertures and mate with the retaining mechanism to substantially align the first, second, and third apertures. A bearing may be disposed on the retaining mechanism for providing rotational freedom between the retaining mechanism, and the bodyside or doorside bracket.