Air spring for the chassis of a motor vehicle

The use of a connecting device with spring elements and detent elements in air springs for motor vehicle chassis addresses connection reliability and manufacturing challenges, enhancing assembly efficiency and reducing costs by ensuring secure, airtight clamping and easy visual verification.

DE102023131724B4Active Publication Date: 2026-06-03VIBRACOUSTIC SE
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
VIBRACOUSTIC SE
Filing Date
2023-11-14
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

Existing air springs for motor vehicle chassis face challenges in maintaining reliable connections between plastic components due to distortion effects, which complicate manufacturing tolerances and make it difficult to ensure airtight clamping, particularly with oval shapes, and the need for visual verification of correct feed position is obscured by design features.

Method used

The introduction of a connecting device with spring elements and detent elements, such as snap-hook springs and snap-hook teeth, provides a releasable snap connection between the contour shell and rolling piston base body, ensuring a secure and quick assembly while allowing for visual verification of correct positioning without additional tools, and includes features like end stops and recesses for drainage and moisture prevention.

Benefits of technology

This solution simplifies manufacturing by adhering to tolerances, reduces costs, minimizes assembly errors, and enhances the reliability of the air spring connection, while also preventing moisture accumulation and facilitating easy visual inspection for correct assembly.

✦ Generated by Eureka AI based on patent content.

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Abstract

Air spring (1) for a motor vehicle chassis comprising a rolling piston with a contour shell (20) and a rolling piston base body (30) made of plastic and an air spring cover (40), wherein an air spring bellows (10) made of elastomeric material is clamped airtight between the air spring cover (40) and the rolling piston base body (30) and defines a working chamber (9) that can be filled with compressed air, wherein the contour shell (20) is provided between the air spring bellows (10) and the rolling piston base body (30), wherein the contour shell (20) surrounds the rolling piston base body (30) at least partially in a hollow cylindrical shape and is axially supported on the rolling piston base body (30) in the direction of a central longitudinal axis (L) of the air spring, wherein the air spring bellows (10) rolls on the contour shell (20) forming at least one rolling fold (11), wherein the contour shell (20) has at least one connecting device (50) has a detachably connected component to the rolling piston base body (30),wherein the connecting device (50) is formed by at least one spring element (24), wherein the spring element (24) has at least one detent element (28), a connection (33) and a spring bar (32), wherein the spring element (24) is arranged at an end (12) of the contour shell (20) facing the air spring cover (40) and on an inner circumferential surface of the contour shell (20), wherein the connection (33) of the spring element (24) projects radially inwards to the central longitudinal axis (L), characterized in that the spring bar (32) of the spring element (24) is designed to be torsionalally flexible about an axis tangential to the circumferential direction (U), wherein the spring bar (32) of the spring element (24) is designed to be radially flexible perpendicular to the central longitudinal axis (L).
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Citation Information

Patent Citations

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