Dual-Body Shock Absorber Piston Assembly for Higher Productivity
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Solution Overview
Problem
There is a demand to suppress a decrease in productivity in shock absorbers.
Innovation Solution
A dual-tube type hydraulic shock absorber design with a piston comprising a first and second piston body, each with specific passage configurations and damping valves, and a manufacturing method that includes connecting the piston bodies and attaching a piston band to ensure fluid flow between chambers, reducing complexity and enhancing assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple damping valves are arranged on separate piston bodies, then the shock absorber can control damping force at different piston speeds, but the assembly complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines multiple damping valves (first and second damping valves) onto a single piston body, rather than distributing them across separate piston bodies. This merging approach maintains the ability to control damping force at different piston speeds while reducing the overall complexity of the piston assembly and simplifying manufacturing processes
Solution Approach 2:
The single piston body is designed to accommodate multiple damping valves with different opening characteristics, making it a multi-functional component that performs both low-speed and high-speed damping control functions within one integrated structure, thereby reducing the number of separate components needed
2Reliability
If multiple piston bodies are used with multiple damping valves, then comprehensive damping control is achieved, but productivity decreases due to increased assembly steps
Solution Approach 1:
By merging multiple damping valves into a single piston body, the patent reduces the number of separate components that need to be assembled, directly decreasing assembly steps and improving productivity while maintaining comprehensive damping control performance through the integrated multi-valve design
3Ease of manufacture
If damping valves are placed on separate piston bodies, then valve function separation is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent merges multiple damping valves onto a single piston body, which maintains clear functional separation of the valves while eliminating the need for precise alignment between multiple separate piston bodies, thereby reducing manufacturing precision requirements while preserving ease of manufacture
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 and manufacturing method enhance productivity by simplifying assembly and reducing complexity, thereby maintaining or improving performance while minimizing production bottlenecks.
Implementation Method 1
a first damping valve which opens at a low piston speed is placed on a first seat... a second damping valve which opens after the first damping valve opens is placed on a second seat
Data Source
AI summary
In this shock absorber, a piston includes a first piston body, a second piston body, and a piston band. The first piston body includes a first passage, a second passage, a first seat, and a second seat. The first seat communicates with the first passage and on which a first damping valve is placed. A second damping valve is placed on the second seat. The second piston body includes a third passage, a fourth passage, a third seat, and a fourth seat. The third seat communicates with the fourth passage and on which a third damping valve is placed. A fourth damping valve is placed on the fourth seat.