Double-Rod Shock Absorber With Unidirectional Flow Paths
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Solution Overview
Problem
Existing double-rod type hydraulic shock absorbers face challenges in stopping reciprocating motion in both directions effectively due to complex fluid flow paths and independent piston rod configurations, leading to instability and size issues.
Innovation Solution
A double-rod type hydraulic shock absorber design featuring a cylinder housing with liquid chambers, interconnected pistons, and unidirectional flow paths that allow liquid to flow between chambers during reciprocation, ensuring one rod returns to its position after collision while maintaining a simple and stable shock-absorbing mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pair of independent piston rods with separately provided contracting sections are used to stop reciprocating motion in both directions, then the flow path resistance can be independently adjustable in each buffer, but the flow path becomes extremely complicated and difficult to manufacture
Solution Approach 1:
The patent merges the flow path control of two independent buffers into a single integrated structure. The common cylinder housing contains both piston rods and their flow paths, allowing the fluid to flow through a unified system rather than two separate systems. This reduces manufacturing complexity while maintaining the ability to independently adjust flow path resistance through separate contracting sections for each piston rod.
Solution Approach 2:
The common cylinder housing serves multiple functions: it houses both piston rods, provides a shared fluid reservoir, and contains both contracting sections. The single fluid system performs the shock-absorbing function for both directions of reciprocating motion, eliminating the need for completely separate buffer systems while maintaining independent controllability.
2Adaptability or versatility
If two buffers are combined with independently variable braking forces, then each piston rod can be independently adjusted, but the overall configuration increases in size and size reduction becomes difficult
Solution Approach 1:
The patent combines two separate buffer configurations into a single integrated unit where both piston rods share a common cylinder housing and fluid system. This merging eliminates redundant components and space, reducing the overall volume while preserving the independent braking force adjustment capability through separate contracting sections and flow path gaps for each piston rod.
3Ease of operation
If a single rod extends from one end of the cylinder housing, then the shock absorber can stop motion in one direction, but a pair of oppositely oriented shock absorbers is needed to stop reciprocating motion in both directions
Solution Approach 1:
The patent merges the functionality of two oppositely oriented shock absorbers into a single device with two piston rods extending from opposite ends of a common cylinder housing. This integration eliminates the need for separate shock absorber units and their associated mounting hardware, simplifying installation while providing shock-absorbing capability in both directions through the unified fluid system.
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 design enables stable shock-absorbing performance in both directions with reduced complexity and size, utilizing common components and minimizing fluid leakage, thus enhancing reliability and cost-effectiveness.
Implementation Method 1
a kinetic energy of the moving object is absorbed by a flow resistance of the oil flowing through the flow path gap
Data Source
AI summary
A double-rod type shock absorber includes a rod, first and second pistons held by the rod, first and second piston chambers disposed on an outer side of the first and second pistons, a liquid storage chamber between the first piston and the second piston, a flow path gap formed between an outer peripheral surface of the first and second pistons and an inner peripheral surface of the liquid chamber, and first and second unidirectional flow paths which connect the first and second piston chambers with the liquid storage chamber, wherein, during reciprocating motion of the rod, the unidirectional flow path located on a front side in a movement direction of the rod is closed, and the unidirectional flow path located on a back side in the movement direction of the rod is opened.