Chassis Component Stop for Eccentric Disc via Molded Recess
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Solution Overview
Problem
Existing chassis components face issues with crack formation, complex dimension compliance, and additional material costs due to the use of supplementary elements for eccentric disc stops, which can lead to unintended deformation and loss of stop function.
Innovation Solution
A recess is molded into the basic material to create a peripheral edge region and base, with parallel oblong surfaces acting as the stop for the eccentric disc, allowing for reliable production without supplementary elements and minimizing deformation, thus avoiding crack formation and adhering to tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slotted openings are used as stops for the eccentric disc, then the stop function is provided, but there is a risk of unintentional crack formation and crack propagation in the basic material
Solution Approach 1:
The stop function is merged with the basic material itself by molding the recess directly into the chassis component. The two oblong surfaces forming the stop are integral parts of the basic material, eliminating the need for separate supplementary elements and preventing crack formation at connection points between different components.
Solution Approach 2:
The problematic supplementary elements (U-shaped sheet metal parts or slotted openings) are extracted from the design. Instead, the stop function is achieved through a recess molded directly into the basic material, removing the source of crack formation risks associated with welded joints or punched openings.
2Reliability
If supplementary elements are welded on to form the stop, then the stop function is achieved, but additional material costs and significant process costs are incurred
Solution Approach 1:
The stop structure is merged with the basic material through direct molding. The recess with its two oblong surfaces is formed as an integral part of the chassis component during the molding process, eliminating the need for separate supplementary elements and welding operations, thereby reducing both material and production costs.
Solution Approach 2:
The basic material itself serves the dual purpose of structural component and stop mechanism. By molding the recess directly into the basic material, the component is self-sufficient and does not require additional supplementary elements or external welding processes to achieve the stop function.
3Reliability
If slotted openings are used as stops, then the stop function is provided, but indentations are formed on the slotted openings during tightening, causing loss of stop function
Solution Approach 1:
The stop surfaces are merged with the basic material structure through molding. The two oblong surfaces form an integral part of the recess, preventing indentation and deformation during tightening operations. The molded structure maintains its dimensional integrity and continues to provide reliable stop function throughout the component's service life.
4Reliability
If slotted openings are used as stops, then the stop function is achieved, but it is complex to comply with maximum permissible tolerances regarding shape and dimensions
Solution Approach 1:
The stop structure is combined with the basic material through direct molding, allowing for precise control of the recess geometry. The molding process enables consistent reproduction of the two oblong surfaces within tight tolerances, eliminating the complexity of achieving precise dimensions with separate supplementary elements or post-processing operations.
Data Source
AI summary
The invention relates to a chassis component having a mount which is produced from a formable basic material and includes at least one slot for receiving a connection bolt for connecting a steering arm and at least one stop for an eccentric disc which is or can be connected in a torsionally stiff sense to the connection bolt. In order for it to be possible to produce the stop for the eccentric disc in a reliable and cost-effective manner without the risk of crack formation, the invention provides for a recess to be molded into the basic material, which recess defines a peripheral edge region and a base enclosed by the edge region, the base including the slot and the edge region including two oblong surfaces extending in parallel with one another which act as the stop for the eccentric disc.