Bumper Bracket with Single Hole and Anti-Rotation Tab

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Solution Overview

Problem

The existing devices for fixing bumpers to motor vehicle bumper beams are complex and require precise production of holes, making them economically inefficient and difficult to assemble.

Innovation Solution

A simplified fixing device with two perpendicular plates, where the first plate has a single fixing hole and anti-rotation tabs to prevent rotation, allowing for pre-mounting and adjustments during assembly without complete fixation, reducing the need for multiple screws and ensuring optimal alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional brackets with multiple fixing holes are used, then the bumper can be securely fixed to the beam, but the assembly process becomes complex and requires precise production of multiple holes

Engineering Contradiction:

Improvefixing securityVSAvoidassembly complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The bracket is divided into two perpendicular plates: a first plate for fixing to the beam and a second plate for fixing the bumper. This segmentation allows each plate to have a simplified structure with fewer holes, reducing overall complexity while maintaining secure fixing functionality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of using multiple fixing holes in the conventional manner, the invention inverts the approach by using a single fixing hole combined with abutment means that project from the first plate to prevent rotation. This inversion simplifies the hole production requirements while maintaining reliability

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If multiple fixing holes are provided in the bracket, then the bracket can be securely attached, but the production precision requirements increase

Engineering Contradiction:

Improveattachment securityVSAvoidhole production precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The attachment function is segmented between a single fixing hole and separate abutment means. The fixing hole provides vertical attachment security while the abutment means prevent rotation, eliminating the need for multiple precisely aligned holes and reducing manufacturing precision requirements

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The abutment means act as intermediary elements between the single fixing hole and the need for rotational stability. These abutments project from the first plate and abut against the beam to prevent rotation, serving as a mediator that eliminates the requirement for multiple precision-drilled holes

Inventive Principle:

Principle #24Intermediary (Mediator)

3Stability of the object's composition

If the bracket is completely fixed before assembly, then the position is stable, but adjustments in Z and Y directions cannot be made

Engineering Contradiction:

Improveposition stabilityVSAvoidadjustment capability

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The abutment means are pre-formed on the first plate to prevent rotation during the assembly process. This preliminary anti-rotation capability allows the bracket to be positioned and adjusted in Z and Y directions before final fixation, as the abutments maintain stability without requiring complete fixation

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The bracket transitions from a static completely-fixed state to a dynamic assembly process where the single fixing hole allows movement while the abutment means constrain rotation. This dynamic behavior enables adjustments during assembly while maintaining stability against rotational movement

Inventive Principle:

Principle #15Dynamics

4Stability of the object's composition

If two fixing points are used on the beam, then the bracket is stable, but the assembly time increases

Engineering Contradiction:

Improvebracket stabilityVSAvoidassembly time

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The two fixing points are segmented into one fixing hole and one abutment means. This segmentation reduces the number of fastening operations required while maintaining bracket stability through the combination of single-point fixation and rotational constraint provided by the abutment

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of providing two complete fixing points (which would require two holes and two fasteners), the invention uses partial action with a single fixing hole supplemented by abutment means that provide the additional stability function. This partial approach reduces assembly time while maintaining sufficient stability

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP3585656B1Device for attaching a bumper to a motor vehicle bumper beam

Publication Date: 2021.03.31 PSA AUTOMOBILES SA

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AI summary

The present invention concerns a device (20) for attaching a bumper to a motor vehicle bumper beam (1), consisting of two plates (21, 22) extending perpendicular to each other at right angles, the first plate (21) attaching to the beam (1) and the second plate (22) to the bumper attachment. The invention lies in the fact that the first plate (21) comprises a single attachment hole (30) and at least one stop means (23) that projects out of said first plate (21) on the same side as the second plate (22), said stop means (23) being located between the single attachment hole (30) and the second plate (22).