Rolling Piston Integrating Additional Volume Tank
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Solution Overview
Problem
Existing air spring dampers for commercial vehicles require a large installation space due to separate additional volume containers, making them bulky and expensive, especially when trying to integrate a rotationally symmetrical rolling piston with sufficient volume.
Innovation Solution
A rolling piston design that integrates a piston section and a container section connected in a fluid-conducting manner, with a cover element forming an additional volume tank, allowing for a compact and cost-effective solution by arranging the additional volume container laterally and extending in the axial direction, thus reducing overall height and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a separate additional volume container is used to increase the air volume, then the damping function is improved, but the installation space requirement increases
Solution Approach 1:
The patent merges the additional volume container with the rolling piston by integrating it into the piston's structure. The container section is formed as part of the rolling piston assembly, with the cover element closing the container section to form the additional volume. This integration eliminates the need for a separate additional volume container, thereby reducing installation space while maintaining the required air volume for damping function.
2Volume of stationary object
If the additional volume container is integrated in the rolling piston, then the installation space is reduced, but the manufacturing complexity increases due to space constraints
Solution Approach 1:
The rolling piston is segmented into distinct functional sections: a piston section and a container section. The container section is specifically designed to form the additional volume when closed by the cover element. This segmentation allows each section to be optimized for its specific function while simplifying the overall manufacturing process, as each section can be produced and then assembled together.
Solution Approach 2:
The container section is arranged laterally adjacent to the rolling piston and extends in the axial direction parallel to the piston section. This lateral arrangement in a different spatial dimension allows the additional volume to be integrated without increasing the overall height of the rolling piston, thereby maintaining compact dimensions while providing sufficient volume for damping.
3Quantity of substance
If complex deep-drawn parts are used to integrate additional volume, then the volume is achieved, but the manufacturing cost increases
Solution Approach 1:
The rolling piston is divided into a piston section and a container section that can be separately manufactured and then connected. This segmentation allows for simpler, more cost-effective manufacturing of each individual section using standard production methods, avoiding the need for complex deep-drawn parts while still achieving the required additional volume when the sections are assembled together.
Data Source
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AI summary
The present invention relates to a rolling piston (12) for an air spring damper (10) in the field of commercial vehicles, comprising a piston portion (28) and a container portion (32), which have a hollow design and are connected to one another in a fluid-conducting manner, and a lid element (34), said lid element (34) being connected to the container portion (32) in order to form an additional volume container (36).