Adjustable Vibration Damper Axial Access Stroke Length
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Solution Overview
Problem
Existing adjustable vibration dampers face challenges in achieving optimal design due to limitations in the length of intermediate tubes, which affect radial access and usable stroke length, leading to either loss of damping medium or increased costs from different construction forms.
Innovation Solution
A hydraulic apparatus is connected to the two work chambers via separate lines, allowing for optimal placement and standardization of components, with a connection sleeve system that compensates for dimensional deviations and maintains play, enabling a compact and cost-effective design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the intermediate tube length is shortened to achieve radial access, then radial access is improved, but the usable stroke length of the piston rod is reduced
Solution Approach 1:
The patent transitions from radial access (one dimension) to axial access (another dimension) by providing access openings in the intermediate tube that extend in the axial direction. This allows the piston rod to access the damping medium through the axial dimension rather than requiring radial access, thereby maintaining full stroke length while still enabling hydraulic apparatus connection.
2Ease of manufacture
If different constructional forms of adjustable damping valves are used for different work chambers, then direct connection to work chambers is achieved, but product cost increases disproportionately
Solution Approach 1:
The patent employs identical adjustable damping valves for both work chambers, with each valve serving multiple functions: regulating damping force, providing fluid connection, and enabling access to damping medium. This universal application of the same component design across different work chambers simplifies manufacturing and reduces product cost while maintaining direct connection capability.
Solution Approach 2:
The patent divides the vibration damper into separate functional modules: intermediate tube with access openings, adjustable damping valves, and hydraulic apparatus. This segmentation allows each component to be independently designed and manufactured using standardized parts, reducing overall complexity and cost while maintaining direct connection functionality.
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
This configuration allows for expanded design freedom, optimal placement of the hydraulic apparatus, and standardization of components, minimizing the loss of usable stroke length and reducing costs by maintaining a simple and compact construction.
Implementation Method 1
a hydraulic apparatus connected to a work chamber on a piston rod side and to a work chamber on a side remote of the piston rod to circulate hydraulic medium between the two work chambers
Implementation Method 2
the connection sleeve is supported with respect to the bottom part to be displaceable radially relative to the longitudinal axis of the connection sleeve. The displaceability determines the tolerance compensation.
Data Source
AI summary
An adjustable vibration damper includes at least one adjustable damping valve, with a piston at a piston rod that divides a cylinder into a work chamber on the piston rod side and a work chamber on the side remote of the piston rod. The cylinder is at least partially enclosed by an intermediate tube that forms a fluid connection between one of the work chambers and the adjustable damping valve. A hydraulic apparatus is connected to the fluid connection of the one work chamber via a first line and to the other work chamber via a second line.