Vibration Damper Piston Valve Spring Centering
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Solution Overview
Problem
Existing vibration damper piston valve preloading devices face challenges in ensuring reliable inner centering of spring elements during assembly, leading to potential faulty assembly and diverging valve characteristics.
Innovation Solution
A preloading device with a spring element fitted by an inner diameter onto a radially inner centering device, where retaining means axially fix the spring element to the centering device, ensuring correct positioning and preventing axial movement, forming a pre-assemblable unit for simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a spring element is used for preloading valve disks, then sufficient preloading is guaranteed, but reliable inner centering becomes difficult to ensure during assembly
Solution Approach 1:
A centering device with a centering element is introduced as an intermediary component between the spring element and the piston rod neck. The centering element with its outer diameter fits onto the piston rod neck, providing a precise reference surface that guides and centers the spring element during assembly, thereby ensuring accurate positioning without affecting the spring's preloading function.
Solution Approach 2:
The centering device is designed to perform the centering action before the spring element is fully installed and loaded. By providing the centering element that fits onto the piston rod neck in advance, the correct positional relationship is established during assembly before any preloading forces are applied, preventing faulty assembly.
2Manufacturing precision
If a centering device is added to ensure inner centering, then centering precision is improved, but device complexity increases
Solution Approach 1:
The centering device is merged with the existing preloading device structure. The centering element is integrated into the assembly that already includes the spring element and valve disks, combining the centering function with the preloading function in a unified structure that reduces overall complexity.
Solution Approach 2:
The centering device serves multiple functions: it provides inner centering for the spring element, acts as a positioning reference during assembly, and maintains the correct radial alignment of components. This multi-functionality reduces the need for separate centering mechanisms, thereby limiting the increase in device complexity.
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 ensures reliable inner centering of the spring element, reducing the risk of faulty assembly and simplifying the assembly process by providing a pre-assemblable constructional unit that maintains the spring element's correct position, thus enhancing the reliability and efficiency of the vibration damper's damping characteristics.
Implementation Method 1
a spring element which is fitted by an inner diameter onto a radially inner centering device
Data Source
AI summary
A preloading device for a piston valve of a vibration damper includes a spring element which is fitted by an inner diameter onto a radially inner centering device which serves for inner centering of the spring element in the installed state of the preloading device. To provide a preloading device for a piston valve by which a reliable inner centering of a spring element can be ensured but which can be placed with low expenditure on assembly at the same time, the spring element is axially fixed at the centering device via retaining means in that the retaining means at least partially enclose the spring element axially on both sides and are rigidly connected to the centering device in each instance.