Vehicle Rear-End Assembly Sequence for Uniform Gaps and Flushness

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Solution Overview

Problem

Existing methods for mounting vehicle elements on a motor vehicle rear end result in undesired gap dimensions and additional weight due to the need for precise tolerances and additional mounting supports, which compromise visual and aesthetic requirements.

Innovation Solution

A method where the rear-end covering is first mounted on the body, followed by the rear lights and then the trim, using predefined points and geometries for orientation and fastening, allowing for precise alignment and secure attachment without additional mounting supports, using screws, plug-in connections, latching, or adhesive bonding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a mounting support is used to achieve precise mounting of vehicle elements, then mounting precision is improved, but device complexity and weight increase

Engineering Contradiction:

Improvemounting precisionVSAvoiddevice complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent removes the mounting support from the vehicle assembly by mounting vehicle elements directly to the vehicle body. The body itself serves as the mounting structure, eliminating the need for an additional mounting support component while maintaining precise mounting through direct fastening points on the body.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent combines the mounting function with the vehicle body structure itself. Instead of using a separate mounting support, the body is directly used as the mounting structure, integrating the mounting function into the existing vehicle structure and eliminating additional components.

Inventive Principle:

Principle #5Merging (Combining)

2Manufacturing precision

If a mounting support is used to achieve precise mounting of vehicle elements, then mounting precision is improved, but weight increases

Engineering Contradiction:

Improvemounting precisionVSAvoidweight

Core Design Contradiction:

Manufacturing precisionVSWeight of moving object

Solution Approach 1:

The mounting support is extracted and removed from the assembly. Vehicle elements are mounted directly to the vehicle body, eliminating the weight of the mounting support while maintaining precise mounting through direct fastening points on the body.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of manufacture

If vehicle elements are mounted with standard tolerances, then ease of manufacture is improved, but mounting precision deteriorates

Engineering Contradiction:

Improveease of manufactureVSAvoidmounting precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent establishes precise mounting points and fastening locations on the vehicle body in advance during body manufacturing. These pre-defined fastening points ensure that vehicle elements can be mounted with precise alignment and uniform gaps, maintaining mounting precision while allowing standard manufacturing tolerances for the elements themselves.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11767072B2Method for mounting vehicle elements to a motor vehicle rear end

Publication Date: 2023.09.26 DR ING H C F PORSCHE AG

AI summary

A method for mounting vehicle elements of a motor vehicle rear end of a motor vehicle. The motor vehicle has a body on which a rear-end covering, rear lights and a trim are mounted. The mounting sequence is chosen in such a way that first of all the rear-end covering is arranged and fastened on the body, then the rear lights are arranged with orientation on the rear-end covering and then the trim is arranged with orientation on the rear-end covering and on the rear lights.