Hydraulic buffering leg cushion
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Solution Overview
Problem
Existing hydraulic buffering leg cushions have limited effective height adjustment and require manual adjustment for balance, leading to instability and discomfort when the floor is uneven.
Innovation Solution
A hydraulic buffering leg cushion with a piston and membrane assembly forming a one-way valve structure, allowing damping oil to flow differently based on the position of the movable unit, enhancing sensitivity and automatic height adjustment without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional hydraulic buffering leg cushion uses a single channel for damping oil flow in both downward and upward states, then the structure is simple, but the height adjustment sensitivity is reduced and a larger restoring spring is required
Solution Approach 1:
The single damping oil channel is segmented into two separate channels: a first damping oil channel for downward movement and a second damping oil channel for upward movement. This segmentation allows independent optimization of damping characteristics for each direction, improving height adjustment sensitivity while maintaining structural simplicity
Solution Approach 2:
A check valve is introduced as an intermediary component to control the flow path of damping oil. The check valve directs damping oil through different channels based on movement direction, enabling the system to achieve enhanced sensitivity without requiring manual intervention or complex control mechanisms
2Device complexity
If manual adjustment is used for leg cushion height, then the balancing mechanism is simple, but the ease of operation deteriorates and user comfort is reduced
Solution Approach 1:
The hydraulic buffering leg cushion employs a self-adjusting mechanism where the piston automatically moves between upward and downward states based on platform tilt, adjusting the leg cushion height without manual intervention. The system uses the gravitational force and damping oil flow to achieve automatic balancing
Solution Approach 2:
The system incorporates feedback through the piston position sensing mechanism that detects the platform's balancing state and automatically adjusts the leg cushion height accordingly. When the platform is unbalanced, the piston responds by adjusting the damping oil flow to restore balance
3Reliability
If a larger restoring spring is used to ensure upward recovery speed, then the reliability is improved, but the weight and size of the supporting structure increase
Solution Approach 1:
The system uses hydraulic damping oil flow through dedicated upward and downward channels to control the recovery speed. The second damping oil channel provides controlled resistance during upward movement, allowing a smaller, lighter restoring spring to achieve reliable upward recovery without increasing spring size
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 provides enhanced stability and automatic balance adjustment for supporting platforms, reducing noise and allowing for a smaller-size restoring spring and lighter weight, while maintaining effective damping and anti-slip characteristics.
Implementation Method 1
the piston is connected with the lower cover through a restoring spring
Implementation Method 2
the speed of upward recovery is determined by the elastic force of restoring springs
Implementation Method 3
a damping accommodating space for receiving damping oil
Data Source
AI summary
A hydraulic buffering leg cushion is mounted to a supporting platform. The hydraulic buffering leg cushion includes a leg cushion body, a movable unit, and a fixed connecting member. The leg cushion body is provided with a leg cushion accommodating space, and includes an upper cover, and a lower cover. The movable unit is received in the leg cushion accommodating space, and includes a piston, a membrane assembly, a rubber bowl, and a movable portion. The rubber bowl is clamped, at its outer circumference, by and between the upper cover and the lower cover, so as to partition a damping accommodating space for receiving damping oil. The movable portion and the rubber bowl are pressed, in sequence, onto the piston. The piston is provided with a damping channel, and is connected with the lower cover through a restoring spring. The membrane assembly is disposed underneath the piston, and forms, with the piston, a one-way valve structure. The restoring spring passes through the membrane assembly. The fixed connecting member is fixedly arranged on the movable portion of the movable unit. As such, by using the supporting force of the restoring spring and the damping oil in the damping accommodating space for providing with buffering hydraulic pressure, a balance for the supporting platform can be adjusted automatically to a balance within an effective range for the supporting platform, without the need of a manual adjustment for a balance. This will ensure stability of the supporting platform without shaking easily.