Shock Absorber Spool Guide Passage Integration
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Solution Overview
Problem
Conventional damping force controlling shock absorbers have complex structures due to individually formed hard and soft passages in the spool guide, leading to increased manufacturing costs and production dispersion.
Innovation Solution
A damping force controlling shock absorber is designed with a simplified structure using disks with slits and four passages in the spool guide to generate hard and soft damping forces, reducing complexity and improving productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hard passage and soft passage are individually formed by using multiple passages in the spool guide, then damping force control is achieved, but the structure becomes complicated and production dispersion increases
Solution Approach 1:
The patent merges the hard passage and soft passage into a single integrated passage structure within the spool guide. Instead of having separate passages for hard and soft damping modes, the invention uses one passage that can switch between hard and soft flow paths through the spool's positioning, thereby simplifying the overall structure while maintaining damping force control capability.
Solution Approach 2:
The single passage in the spool guide is designed to serve multiple functions: it acts as both the hard passage and soft passage depending on the spool's position. This multi-functional design eliminates the need for separate dedicated passages for each damping mode, reducing structural complexity while preserving adaptability.
2Adaptability or versatility
If multiple passages are formed in the spool guide for hard and soft damping, then damping characteristics are adjusted, but manufacturing cost increases
Solution Approach 1:
By combining multiple passages into a single integrated passage structure, the manufacturing process is simplified. Fewer passages mean less machining complexity, reduced material removal, and easier assembly, all of which contribute to lower manufacturing costs while maintaining the ability to provide both hard and soft damping characteristics.
3Adaptability or versatility
If complex passage structure is used in spool guide, then damping force control is achieved, but productivity decreases
Solution Approach 1:
The integration of multiple passages into a single passage structure reduces the number of manufacturing steps and assembly operations required. This simplification directly improves productivity by enabling faster production cycles and reducing the complexity of quality control inspections.
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 simplifies the passage structure, reduces production dispersion, and increases productivity by allowing for adjustable damping forces through the connection of disks with slits and the use of bypass passages in the spool guide.
Implementation Method 1
a solenoid configured to elevate a spool by a magnetic force between the piston rod and the piston
Data Source
AI summary
A damping force controlling shock absorber includes: retainers respectively connected to top and bottom surfaces of the piston, a connection passage communicating with a main passage being formed to vertically penetrate the retainers; housings respectively disposed on corresponding opposite surfaces of the retainers to form pilot chambers on mutual corresponding surfaces of the housings, a pilot passage being formed to vertically penetrate the housings so as to communicate the pilot chambers with the outside; pilot valves that are in close contact with the connection passage between the retainers and the housings to generate a main damping force; and a spool guide that penetrate and connects to the retainers, the housings, and the pilot valves and guides the spool in a state of surrounding the outside of the spool.