Hydraulic Shock Absorber Inflow Layout for Spiral Oil Purification
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Solution Overview
Problem
Hydraulic shock absorbers in saddle-type vehicles face issues with impurities entering the damping force adjusting unit, interfering with the adjustment of damping force due to oil flowing through the system containing impurities.
Innovation Solution
A hydraulic shock absorber design that utilizes centrifugal force to separate impurities from the oil by generating a spiral flow, with an enclosure member surrounding the rod's lower end and an inflow path that deviates from the rod's axis, ensuring impurities are removed before the oil reaches the damping force adjusting unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a small hole and needle valve are used as damping force adjusting units, then damping force adjustment is achieved, but impurities enter between the small hole and needle valve interfering with adjustment
Solution Approach 1:
The patent introduces a preliminary action by adding a centrifugal separation mechanism before the oil reaches the damping force adjusting unit. The enclosure member with offset inflow path creates a spiral flow that separates impurities from oil in advance, preventing impurities from entering the small hole and needle valve, thus protecting the reliability of damping force adjustment
Solution Approach 2:
The patent uses an intermediary mechanism (enclosure member with spiral flow path) between the oil source and the damping force adjusting unit. This intermediary separates impurities from the oil flow before it reaches the sensitive needle valve assembly, acting as a protective mediator that maintains system reliability without interfering with the adjustment function
2Ease of operation
If oil flows through the rod containing impurities, then damping force adjustment is possible, but the amount of impurities flowing with oil reduces adjustment accuracy
Solution Approach 1:
The centrifugal separation mechanism performs preliminary purification of the oil before it reaches the damping force adjusting unit. By removing impurities in advance through spiral flow, the oil that subsequently flows through the rod is cleaner, ensuring more accurate damping force adjustment without interference from particulate matter
3Device complexity
If impurities are not separated from oil, then system complexity is low, but electronic control systems are prone to magnetic material interference
Solution Approach 1:
The patent implements preliminary separation of impurities using a relatively simple centrifugal mechanism before oil enters the electronic control system. This prevents magnetic materials and other impurities from reaching sensitive electronic components, protecting control reliability while adding minimal structural complexity
Solution Approach 2:
The enclosure member acts as an intermediary barrier between the impurity-containing oil and the electronic control system. By placing this separation mechanism in the fluid path, it protects electronic components from magnetic material interference without requiring complex filtration systems integrated into the electronics themselves
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 design effectively reduces the amount of impurities flowing with the oil, maintaining the accuracy and longevity of the damping force adjustment, particularly beneficial for electronically controlled systems prone to magnetic material interference.
Implementation Method 1
impurities contained in oil can be separated by using centrifugal force by generating a spiral flow of oil (oil vortex) in a hydraulic shock absorber
Data Source
AI summary
A hydraulic shock absorber includes an enclosure member. The enclosure member has an inflow path which guides oil from the outside to the inside. The inflow path is arranged so that an axis of the inflow path deviates from a central axis of a rod.