Multi-Cavity Shock Absorber with Gas Spring for Damping Control
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Solution Overview
Problem
Conventional shock absorbers in vehicles do not effectively manage the flow of hydraulic oil to optimize damping performance, leading to suboptimal energy absorption and damping effects.
Innovation Solution
The shock absorber design incorporates multiple oil cavities and a gas cavity with adjustable components, including baffle structures and elastic members, to control the flow of hydraulic oil and gas, enhancing the unidirectional flow and damping efficiency by varying the positions of adjusting rods and sealing assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional shock absorbers use a simple single-cavity design, then the device complexity is low, but the damping performance and energy absorption are suboptimal
Solution Approach 1:
The shock absorber is divided into multiple oil cavities (first oil cavity, second oil cavity, third oil cavity) with distinct functions. Each cavity handles specific aspects of oil flow control, allowing complex damping performance to be achieved through modular segmentation rather than a single complex chamber
Solution Approach 2:
Adjusting rods are introduced that can be positioned at different locations within the cavities to dynamically control oil flow paths and resistance. This allows the damping characteristics to be adjusted based on operating conditions, improving reliability without requiring a completely complex fixed structure
2Reliability
If multiple oil cavities and adjusting rods are added to control oil flow, then the damping effect and energy absorption are improved, but the device complexity increases
Solution Approach 1:
The gas cavity serves multiple functions: it acts as a spring element for rebound control, a pressure regulator for the hydraulic system, and a cushioning element for end-of-stroke protection. This multi-functionality reduces the need for separate components, offsetting the complexity added by multiple oil cavities
Solution Approach 2:
The piston assemblies with adjusting rods are nested within the oil cavities, and the entire mechanism is contained within the cylinder housing. This nested arrangement allows multiple components to occupy compact space efficiently, managing complexity through spatial organization rather than scattered component placement
3Speed
If the oil flow speed between cavities is increased, then the responsiveness and damping effect are improved, but the loss of energy through turbulence and heat increases
Solution Approach 1:
Different cavity regions have different flow characteristics optimized for their specific functions. The first oil cavity handles high-speed compression flow, the second oil cavity manages controlled transition flow, and the third oil cavity handles rebound flow. This local optimization allows high flow speeds where needed while minimizing turbulence and energy loss in other regions
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 improves the damping effect by regulating oil flow speeds between cavities, resulting in enhanced energy absorption and improved shock absorption performance.
Implementation Method 1
a third piston (60) received in the cylinder (30)... a gas cavity (74) configured to house a gas
Implementation Method 2
The shock absorber includes a push rod (10), a first piston (20) connected to the push rod (10)... configured to be full with hydraulic oil
Implementation Method 3
The first oil cavity (71), the second oil cavity (72), and the third oil cavity (73) can be configured to contain hydraulic oil and can be in fluidic communication with one another
Data Source
AI summary
A shock absorber includes a push rod, a first piston, a cylinder, a piston rod, a second piston, and a third piston. The cylinder and the first piston cooperatively define a first oil cavity. The second piston, the first piston, and the cylinder cooperatively define a second oil cavity. The third piston and the cylinder cooperatively define a gas cavity. The first piston is configured to urge the hydraulic oil of the second oil cavity to flow into the first oil cavity and the third oil cavity in event the push rod is pushed. The third piston is configured to compress the gas in the gas cavity in event the third piston is urged toward the gas cavity, thereby creating a damping effect.