Annular Piston With Depression For Shock Absorber Stacking
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Solution Overview
Problem
Pistons stacked vertically in shock absorbers can damage the sheet surface of one piston due to contact with the leg part of another piston, affecting the desired damping force and making storage and handling inconvenient.
Innovation Solution
An annular piston design with a leg part that contacts a supporting part on another piston instead of the sheet surface, featuring a depression on the inner circumference of the leg part to prevent damage and ensure proper alignment during stacking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pistons are stacked vertically for storage and handling, then storage convenience is improved, but the sheet surface of the piston may be damaged by contact with the leg part of another piston
Solution Approach 1:
The supporting part acts as an intermediary element between the leg part of one piston and the sheet surface of another piston. When pistons are stacked, the leg part contacts the supporting part (which has higher strength and is specifically designed for contact), preventing direct contact between the leg part and the vulnerable sheet surface, thus protecting the sheet surface from damage while enabling vertical stacking for convenient storage and handling.
2Device complexity
If the leg part contacts the sheet surface during stacking, then structural simplicity is maintained, but damage to the sheet surface occurs affecting damping force
Solution Approach 1:
The supporting part is provided locally at a specific position on the piston (opposite to the leg part in the axial direction) with enhanced properties (higher strength, specifically designed geometry). This local enhancement allows the piston to withstand contact loads during stacking without compromising the overall structural simplicity. The supporting part is strategically positioned to intercept contact forces before they reach the sheet surface, ensuring the sheet surface maintains its integrity and the piston delivers the desired damping force.
Data Source
AI summary
Provided on one plane of an annular piston are a sheet surface on which a leaf valve is seated and a supporting part constructed of a slope part and a flange part, and provided on the other plane is a leg part having a depression on an edge part. When two pistons are axially stacked, the sheet surface of one of the pistons is contained inside the depression of the other piston, and the sheet surface of the one piston is protected.