Vibration Damper Non-Destructive Disassembly Design
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Solution Overview
Problem
Single-tube gas-assisted shock absorbers in motor vehicles pose safety risks due to potential damage from excessive heat, leading to hazardous product classification, increased transportation costs, and logistical complexities, as they cannot be disassembled non-destructively to prevent component ejection during explosions.
Innovation Solution
A vibration damper design featuring a damper cylinder with a first clamping element holding the guiding closure and a second clamping element connected to the internal wall, along with a holding element between the second clamping element and the piston rod functional group, which absorbs and dissipates forces during overpressure events, preventing component ejection and allowing non-destructive disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the closure pack is fixed by beads or by crimping the tube rim in the damper tube to increase safety against heat damage, then the safety against component ejection during explosions is improved, but the ability to disassemble the vibration damper in a non-destructive manner is lost
Solution Approach 1:
The closure pack is divided into a closure body and a closure cap that can be separated. The closure body remains fixed in the damper tube with enhanced retention features, while the closure cap can be removed. This segmentation allows the damper to be disassembled non-destructively for maintenance while the closure body provides sufficient safety against component ejection during explosions.
Solution Approach 2:
The closure pack transitions from a static, permanently fixed design to a dynamic system where the closure cap can be removed and reattached. The closure body remains dynamically secured in the damper tube through enhanced retention features, while allowing controlled access to the internal components for maintenance purposes.
2Ease of repair
If the closure pack is fixed by a snap ring to enable non-destructive disassembly, then the ease of maintenance is improved, but the safety against component ejection during heat-induced explosions deteriorates
Solution Approach 1:
The closure pack is segmented into a closure body with integrated retention features and a removable closure cap. This allows the closure body to provide enhanced safety against component ejection while the closure cap can be removed for maintenance, combining both safety and ease of repair requirements.
Solution Approach 2:
The retention mechanism is enhanced by adding radial retention features (such as beads or crimping) on the closure body while maintaining axial removability through the closure cap. This multi-dimensional approach to retention allows simultaneous achievement of safety against explosions and ease of maintenance.
Data Source
AI summary
A vibration damper may include a damper cylinder, a guiding closure that is held in the damper cylinder by a first clamping element, a piston rod that is axially guided in the guiding closure, and a piston rod functional group that is connected to the piston rod and disposed in the damper cylinder. At least one second clamping element may be connected to an internal wall of the damper cylinder, and a holding element may be disposed in the damper cylinder. The second clamping element can be disposed between the guiding closure and the holding element, and the holding element can be disposed between the second clamping element and the piston rod functional group. Further, the internal diameter of the second clamping element at least in portions is smaller than the external diameter of the holding element.