Bellows Accumulator Assembly With Stem Fixation for Suspension Dampers
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Solution Overview
Problem
Current damper designs for vehicle suspension systems face challenges in the manufacturing, installation, and charging of pressurized gas accumulators, particularly in terms of ease of assembly, sealing, durability, corrosion resistance, noise reduction, and the ability to charge the accumulators before or after installation on the damper.
Innovation Solution
The method involves forming an outer shell for the accumulator, assembling a bellows assembly by connecting distal and proximal plates to an annular bellows wall, and inserting it into the shell. The distal plate is coupled to a stem of a gas charging port using a fixation component that engages the stem, allowing for easier assembly and charging of the accumulator, which can be done before or after installation on the damper housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If accumulators are pre-assembled and charged with pressurized gas before installation on the damper, then the charging process is simplified, but the assembly complexity and sealing requirements increase
Solution Approach 1:
The accumulator is divided into modular components: outer shell, bellows assembly with distal/proximal plates, stem, and fixation component. This segmentation allows independent assembly and charging of the accumulator before final installation on the damper, simplifying the charging process while managing assembly complexity through standardized interfaces.
Solution Approach 2:
The stem acts as an intermediary element that connects the bellows assembly to the outer shell and provides the gas charging port interface. This intermediary structure enables simplified charging through a dedicated port while maintaining reliable sealing between components during both pre-assembly and final installation.
2Strength
If the bellows assembly is inserted into the outer shell with the distal plate facing the end wall, then the structural integrity is improved, but the assembly difficulty increases
Solution Approach 1:
The distal plate is pre-assembled with the bellows and connected to the stem with the fixation component before insertion into the outer shell. This preliminary assembly ensures proper orientation and structural integrity, while the standardized interface facilitates easier final assembly by eliminating complex alignment requirements during insertion.
3Reliability
If a fixation component is used to couple the distal plate to the stem, then the sealing and durability are enhanced, but the manufacturing complexity increases
Solution Approach 1:
The fixation component merges multiple functions into a single element: it mechanically couples the distal plate to the stem, provides sealing surfaces, and ensures proper positioning. This consolidation enhances reliability through improved sealing and durability while reducing manufacturing complexity compared to using separate components for each function.
4Adaptability or versatility
If the accumulator can be charged after installation on the damper, then the flexibility and adaptability are improved, but the risk of leakage and contamination increases
Solution Approach 1:
The stem serves as a protected intermediary that provides a sealed gas charging port interface accessible after installation. This design enables flexible post-installation charging while the stem's sealing structure minimizes leakage and contamination risks by providing a controlled interface between the accumulator interior and exterior environments.
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
A method of assembling an accumulator for a suspension damper where the method includes the steps of forming an outer shell of an accumulator, assembling a bellows assembly by connecting distal and proximal plates to opposite ends of an annular bellows wall, and inserting the bellows assembly into the outer shell. The outer shell is formed such that it includes a distal end with an end wall and an open end opposite the distal end. The bellows assembly is inserted into the open end of the outer shell with the distal plate facing the end wall of the outer shell. The method proceeds with coupling the distal plate of the bellows assembly to a stem of a gas charging port on the end wall of the outer shell at a fixed axial position using a fixation component that engages the stem of the gas charging port.