Vibration Damper Assembly Using a Movable Supporting Ring
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Solution Overview
Problem
In vibration dampers, the axial installation space is often limited, leading to challenges during assembly where the piston rod may not have sufficient axial projection relative to the piston rod guide, and existing solutions either require additional welding or compromise on the length of the work cylinder and damping medium.
Innovation Solution
A securing device comprising an axially displaceable supporting ring within the work cylinder, which allows for reduced piston rod length and facilitates assembly by providing a defined support face and optional adapter rods for assembly assistance, enabling the piston rod to protrude from the piston rod guide during assembly and filling, without the need for additional tools or sacrificial components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the piston rod is made shorter to reduce installation space, then the axial installation space is reduced, but the piston rod cannot protrude sufficiently from the piston rod guide during assembly
Solution Approach 1:
A supporting ring is introduced as an intermediary component during assembly. This ring temporarily supports the piston rod, enabling it to protrude sufficiently from the piston rod guide during the assembly process. After assembly is complete, the supporting ring is removed, allowing the piston rod to be made shorter than previously possible without compromising assembly ease.
2Length of stationary object
If a shorter work cylinder is used to reduce installation space, then the axial installation space is reduced, but additional welding operations are required for axial extensions
Solution Approach 1:
The supporting ring is extracted as a separate, removable component rather than being integrated into the work cylinder structure. This eliminates the need for additional welding operations or permanent modifications to the work cylinder, while still providing the necessary support during assembly. The ring can be easily installed and removed without affecting the manufacturing process of the main components.
3Ease of operation
If the piston rod protrudes sufficiently during assembly, then assembly can be performed correctly, but the piston rod requires greater length than available space permits
Solution Approach 1:
The supporting ring is installed in advance during the assembly process to provide temporary support for the piston rod. This preliminary action enables the piston rod to protrude sufficiently for correct assembly positioning. After the assembly is completed, the supporting ring is removed, allowing the final design to use a shorter piston rod that fits within the available axial installation space.
Data Source
AI summary
Vibration damper, including a piston rod, axially movably guided in a work cylinder, with a piston, wherein the work cylinder is closed at the end by a piston rod guide, and the vibration damper has a securing device during an assembly process so that at least a length portion of the piston rod passes through the piston rod guide. The securing device is formed by a supporting ring that is guided axially displaceably in the work cylinder and, in the fully assembled vibration damper, assumes an axial position inside the work cylinder in a length region which is delimited on one side by the piston and on the other side by a base part of the work cylinder.