Undercarriage Multi-Point Link With Recess-Guided Roving Paths

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Solution Overview

Problem

Existing multipoint links for vehicle undercarriages face limitations in roving placement due to the risk of slippage and material inefficiency, as the roving must be laid along geodesic lines, which do not directly cover main load paths and result in higher material expenditure.

Innovation Solution

Incorporating recesses on the core element's surface allows for independent winding patterns, enabling more flexible roving placement and denser load paths, with recesses having various cross-sectional shapes and arrangements to facilitate efficient load transfer and prevent material accumulation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the roving is laid along geodesic lines to prevent slippage, then the reliability of roving placement is improved, but the material expenditure increases and load transfer efficiency deteriorates

Engineering Contradiction:
Improveroving placement stabilityVSAvoidmaterial expenditure
Core Design Contradiction:
ReliabilityVSLoss of substance

Solution Approach 1:

The core element is pre-formed with integrated recesses that define the exact winding path for the roving. These recesses are created before the roving winding process, allowing the roving to be laid precisely along load paths without slippage while optimizing material usage.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The recesses act as an intermediary structure between the core element and the roving. They provide a physical guide that ensures the roving follows the desired path, preventing slippage while allowing for efficient load transfer along main load paths rather than purely geodesic lines.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If the roving is laid along geodesic lines to prevent slippage, then the reliability of roving placement is improved, but the load transfer efficiency deteriorates due to indirect load paths

Engineering Contradiction:
Improveroving placement stabilityVSAvoidload transfer efficiency
Core Design Contradiction:
ReliabilityVSStrength

Solution Approach 1:

The recesses are strategically positioned and shaped to match the local load paths at different locations on the core element. This allows the roving to follow optimal load transfer paths in each local region, improving overall load transfer efficiency while maintaining placement stability through the guiding recesses.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The winding path is pre-defined by the recesses in the core element, allowing the roving to be laid directly along main load paths from the beginning of the winding process, eliminating the need for circuitous geodesic paths and improving load transfer efficiency.

Inventive Principle:
Principle #10Preliminary action

3Manufacturing precision

If the core element is designed to provide precise shape and geometric dimensions, then the manufacturing precision is improved, but the core element must absorb high forces during winding which may cause deformation

Engineering Contradiction:
Improvegeometric dimension toleranceVSAvoidcore element load bearing capacity
Core Design Contradiction:
Manufacturing precisionVSStrength

Solution Approach 1:

The core element is segmented into functional zones: load-bearing regions that can deform elastically to absorb winding forces, and precision regions with recesses that define the final geometric dimensions and shape. This segmentation allows different parts of the core element to serve different functions under winding loads.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The recesses serve as intermediary structures that transfer and distribute the forces from the roving winding process across the core element. By providing a defined winding path through the recesses, the forces are distributed more evenly, preventing localized deformation that would compromise geometric precision.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS11878563B2Multi-point link for an undercarriage of a vehicle
Publication Date: 2024.01.23 ZF FRIEDRICHSHAFEN AG
  • US11878563B2 patent drawing
  • US11878563B2 patent drawing
  • US11878563B2 patent drawing

AI summary

A multipoint link for an undercarriage of a vehicle, having a core element formed from a foamed material and at least one roving of bundled continuous filaments wound around the core element, the at least one roving winding around the core element in at least one layer forming an outer layer of the multipoint link. The recesses serving to guide the at least one roving to be laid by winding are incorporated in the surface of the core element.