Shock Absorber Piston Assembly Segmentation
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Solution Overview
Problem
The complexity of the sandwich type piston structure in shock absorbers increases the unit price and reduces productivity due to its intricate inner passages.
Innovation Solution
A piston assembly with a simple structure featuring alternately arranged compression and rebound passages, connected by compression and rebound retainers with protrusions to prevent relative rotation, facilitating easier assembly and fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sandwich type piston structure is used to increase the degree of freedom of tuning, then the shock absorber performance can be improved, but the inner passage becomes complicated, increasing unit price and reducing productivity
Solution Approach 1:
The piston is divided into multiple independent piston bodies, each with its own simple passage structure. The piston bodies are stacked in sequence with retainers, allowing each segment to be manufactured separately and then assembled. This segmentation maintains the tuning flexibility of a complex sandwich structure while simplifying the internal passage design of each individual component and enabling modular manufacturing.
Solution Approach 2:
Multiple piston bodies are nested within the cylinder in a stacked configuration, with each piston body containing its own passages. The retainers connect the piston bodies in sequence, creating a nested arrangement where simpler individual structures combine to achieve the functional complexity of a sandwich piston, thereby reducing manufacturing difficulty while maintaining performance.
2Adaptability or versatility
If a sandwich type piston structure is used, then the degree of freedom of tuning is increased, but the unit price is increased and productivity is lowered
Solution Approach 1:
The piston assembly is segmented into multiple independent piston bodies that can be manufactured separately using standard machining processes. Each piston body has a simple passage structure that is easier and faster to manufacture than a monolithic sandwich structure, thereby increasing productivity while maintaining the tuning flexibility through the stacked configuration.
Solution Approach 2:
The piston bodies are designed to be pre-manufactured as separate components with standardized features, allowing for parallel production and easier assembly. The connection holes and retaining structures are designed in advance to facilitate quick assembly, reducing overall manufacturing time and increasing productivity compared to machining a complex sandwich structure as a single piece.
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 results in a cost-effective and easily manufacturable piston assembly that maintains open passages for efficient fluid flow, enhancing the shock absorber's performance and ride comfort.
Implementation Method 1
During a compression stroke of the shock absorber, oil of a compression chamber disposed under the piston valve moves to a rebound chamber through a compression passage formed in the piston valve. During a rebound stroke of the shock absorber, oil of a rebound chamber disposed over the piston valve moves to a compression chamber through a rebound passage formed in the piston valve to thereby absorb a vibration and shock.
Data Source
AI summary
Provided is a piston assembly of a shock absorber, which is simple in structure and is easy to fabricate. The piston assembly of the shock absorber includes: a piston body in which a piston rod reciprocating within a cylinder penetrates a central portion thereof, and a plurality of compression passages and a plurality of rebound passages alternately penetrating the piston body are formed around the piston rod; a compression retainer placed over the piston body, in which a plurality of connection holes corresponding to the compression passages penetrate the compression retainer; and a rebound retainer placed under the piston body, in which a plurality of connection holes corresponding to the rebound passages penetrate the rebound retainer.