One-Piece Chassis Guide Elements to Prevent Forming Cracks

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Solution Overview

Problem

Existing chassis components with eccentric mechanisms suffer from high pressure forming processes that lead to pinch joints, cracks, and reduced service life due to separate guide elements and cutting technologies.

Innovation Solution

A chassis component with one-piece guide elements formed from the same material as the base body, featuring radiused transitions and tapered designs to enhance stability and reduce crack formation, produced through a low-pressure cold forming process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If guide elements are formed using high-pressure forming process, then the guide elements can be shaped with rectangular cross-section, but pinch joints and damage occur on the component reducing service life

Engineering Contradiction:
Improveguide element shapeVSAvoidservice life
Core Design Contradiction:
ShapeVSReliability

Solution Approach 1:

The patent applies curvature by forming rounded transitions at the corners of the guide elements instead of sharp rectangular corners. The forming process creates guide elements with curved surfaces that eliminate stress concentration points, thereby preventing crack formation while maintaining the desired rectangular cross-sectional shape for functional requirements.

Inventive Principle:
Principle #14Spheroidality (Curvature)

2Ease of manufacture

If guide elements are cut using cutting technology, then the guide elements can be formed, but cracks form within the guide elements reducing service life

Engineering Contradiction:
Improveguide element formationVSAvoidservice life
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The patent replaces the cutting process with a forming process. Instead of removing material through cutting which creates cracks, the guide elements are formed by plastic deformation of the base body material. This mechanical forming process maintains material continuity and eliminates the harmful effects of cutting-induced cracks.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If separate guide elements are used, then the eccentric mechanism can function, but additional fastening is required which may slip or come loose

Engineering Contradiction:
Improveeccentric mechanism functionVSAvoidfastening stability
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent merges the guide elements with the base body by forming them as integral parts of the same component. The guide elements are created by deforming the base body material itself, eliminating the need for separate fastening elements. This integration ensures that the guide elements cannot slip or come loose, greatly enhancing reliability while maintaining the eccentric mechanism's functionality.

Inventive Principle:
Principle #5Merging (Combining)

4Ease of manufacture

If high pressure is applied during forming, then the guide elements can be formed, but the forming process leaves damage on the component

Engineering Contradiction:
Improveforming processVSAvoidcomponent quality
Core Design Contradiction:
Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent uses curved forming surfaces and rounded transitions in the guide element design to distribute forming pressure more evenly throughout the material. This approach reduces peak stresses during the forming process, preventing damage while still achieving the desired guide element geometry through controlled plastic deformation.

Inventive Principle:
Principle #14Spheroidality (Curvature)

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 increases the service life and reduces production costs by ensuring robustness, minimizing crack risk, and optimizing material flow, while maintaining material integrity and weight reduction.

Implementation Method 1

The guide elements are formed in one piece and using the same material of the base body of the chassis component by mechanical processing

Methodology Applied
Scientific EffectCold forming: Cold-forming

Implementation Method 2

an outer transition region with a radius is formed between the respective contact sides and the base body

Methodology Applied
Scientific EffectMaterial displacement: Deformation

Data Source

PatentUS12434519B2Chassis component and method for producing a chassis component
Publication Date: 2025.10.07 BENTELER AUTOMOBILTECHNIK GMBH
  • US12434519B2 patent drawing
  • US12434519B2 patent drawing
  • US12434519B2 patent drawing

AI summary

The present disclosure relates to a chassis component having a base body, wherein the base body has an opening for passing through a fastening means and two guide elements for guiding an eccentric element are arranged on opposite sides of the opening, wherein the guide elements are formed in one piece and using the same material of the base body of the chassis component by mechanical processing and each have a back side and a contact side facing the opening, wherein the contact side is formed orthogonally to the base body. According to the present disclosure, an outer transition region with a radius is formed between the respective contact sides and the base body. The present disclosure further relates to a method for producing a chassis component.