Hydraulic End Stop Sealing Ring for Vibration Damper Impact Absorption
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Solution Overview
Problem
Existing vibration dampers with hydraulic end stops face limitations in increasing damping force to effectively absorb high impact energy, leading to potential axle and damper movement into rebound limits during extreme roadway stimuli, and existing designs are often complex and costly to produce.
Innovation Solution
A vibration damper with a hydraulic end stop featuring a sealing ring that radially contacts the piston rod and inner control space wall, incorporating radial throttle grooves and spring tongues for controlled damping medium flow, and a control tube with bypass grooves to manage pressure and flow, allowing for efficient energy absorption and reduced noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If resilient end stops of elastic material are used to absorb impact energy, then the construction is simple, but the energy absorption capability is severely limited
Solution Approach 1:
The invention combines the simple resilient end stop structure with a hydraulic damping system. The resilient end stop maintains construction simplicity while the hydraulic system (comprising the piston with throttle holes, damping medium, and control elements) is integrated into the same component to provide enhanced impact energy absorption capability.
Solution Approach 2:
The invention introduces a hydraulic damping mechanism where a piston with throttle holes moves within the resilient end stop, utilizing damping medium to create hydraulic resistance. This hydraulic system enables the end stop to absorb significantly higher impact energy while maintaining a relatively simple overall construction.
2Loss of energy
If hydraulically acting end stops are used to absorb higher impact energy, then the energy absorption capability increases, but the construction becomes complicated
Solution Approach 1:
The invention merges the hydraulic damping functionality into the resilient end stop structure itself. The piston, throttle holes, and damping medium are integrated within the end stop component, eliminating the need for separate hydraulic systems and reducing overall construction complexity.
Solution Approach 2:
The resilient end stop serves multiple functions: it provides mechanical cushioning through its elastic material properties and simultaneously functions as a hydraulic damper through the integrated piston and throttle hole system. This multi-functionality reduces the need for additional components and simplifies the overall construction.
3Reliability
If multiple spring elements and end stop rings are used in a mechanical-hydraulic end stop, then the damping performance is improved, but the manufacturing cost and complexity increase
Solution Approach 1:
The resilient end stop is designed to perform multiple damping functions simultaneously through its integrated hydraulic system, eliminating the need for multiple separate spring elements and end stop rings. This reduces the number of parts, simplifies manufacturing, and lowers production costs while maintaining reliable damping performance.
Solution Approach 2:
The invention combines the functions of multiple spring elements and end stop rings into a single integrated resilient end stop component with an embedded hydraulic damping system. This consolidation reduces part count, simplifies assembly, and decreases manufacturing complexity and cost.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a simple, cost-effective vibration damper capable of absorbing high impact energy, providing a defined damping force curve and reducing noise during rebound, while maintaining structural integrity and flexibility.
Implementation Method 1
the sealing ring has a plurality of spring tongues which are supported at a supporting surface on the piston rod side
Implementation Method 2
the sealing ring has at least one radial throttle groove which takes effect when the end stop with the sealing ring moves into the control space and ensures a defined flow of damping medium
Data Source
AI summary
The vibration damper including a hydraulic end stop that has a sealing ring which is arranged between the end stop ring and the closure element, is supported axially on one side at the end stop ring, engages radially around the piston rod, is mounted in a sliding manner at the piston rod, and with its outer circumferential surface radially contacts the inner wall of the control space, wherein the sealing ring has at least one radial throttle groove which takes effect when the end stop with the sealing ring moves into the control space and ensures a defined flow of damping medium between the control chamber and the first working space, and wherein the sealing ring has a plurality of spring tongues which are supported at a supporting surface on the piston rod side.