Hydraulic Work Support Spring Layout for Stable Air Pressure
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Solution Overview
Problem
The existing work support systems experience excessive air pressure fluctuations due to the air-filled spring chamber, requiring complex ventilation and supply/discharge passages, which complicates the structure and increases size.
Innovation Solution
The work support design incorporates a release spring within the actuation chamber filled with pressurized oil, reducing air supply and discharge through the movement of the output member, eliminating the need for ventilation holes and supply/discharge passages by keeping air pressure stable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a spring chamber filled with air is provided above the second piston, then the release spring can be installed to bias the output member, but air pressure in the housing excessively increases/decreases requiring ventilation holes and supply/discharge passages
Solution Approach 1:
The release spring is extracted from the air-filled spring chamber and relocated to the oil-filled actuation chamber. This removes the source of air pressure fluctuations from the housing, eliminating the need for ventilation holes and supply/discharge passages while maintaining the biasing function of the release spring
Solution Approach 2:
The release spring is nested within the actuation chamber, utilizing the existing oil-filled space. The actuation chamber serves dual purposes: actuating the piston and housing the release spring, thereby eliminating the separate air-filled spring chamber and its associated ventilation requirements
2Reliability
If ventilation holes and supply/discharge passages are provided in the lower wall of the housing and table, then air pressure can be regulated, but the structure becomes complicated
Solution Approach 1:
The ventilation hole and supply/discharge passage are extracted from the housing and table structure. By relocating the release spring to the actuation chamber, the source of air pressure regulation requirements is removed, eliminating the need for these complex passages
Solution Approach 2:
The actuation chamber is merged with the function of housing the release spring. The single oil-filled chamber performs both actuation and spring housing functions, eliminating the separate air-filled spring chamber that would require ventilation and supply/discharge passages
3Force
If the release spring is installed in the air-filled spring chamber, then the output member can be biased, but the amount of air supplied/discharged excessively increases requiring complex passages
Solution Approach 1:
The release spring is extracted from the air-filled environment and placed in the oil-filled actuation chamber. This prevents the spring's operation from causing air to be supplied or discharged, eliminating the excessive air quantity issue while maintaining the biasing force
Solution Approach 2:
The release spring operates in a hydraulic (oil-filled) environment rather than a pneumatic (air-filled) one. The incompressible oil medium eliminates air compression/expansion effects, preventing excessive air supply/discharge while maintaining spring functionality
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 configuration results in a compact, mechanically simple work support with stable air pressure, preventing excessive pressure changes and reducing the complexity of the system.
Implementation Method 1
a release spring is attached between a leading end wall of the actuation chamber and a flange portion provided to a base end portion of the output member. The release spring is configured to bias the output member toward the base end side
Implementation Method 2
A biasing mechanism is configured to bias the support rod and the output member so that the support rod and the output member recede from each other
Implementation Method 3
An actuation chamber is provided in a base end portion of the housing. An output member is configured to be moved toward the leading end side in the axial direction by pressurized oil supplied to the actuation chamber
Data Source
AI summary
A support rod (3) is inserted in a housing (1) so as to be movable in an up-down direction. An actuation chamber (21) is provided in a lower end portion of the housing (1). An output member (24) is moved upward by pressurized oil supplied to the actuation chamber (21). In the actuation chamber (21), to which pressurized oil is supplied, a release spring (33) is attached between a leading end wall (31) of the actuation chamber (21) and a flange portion (25a) provided to a base end portion of the output member (24). The release spring (33) biases the output member (24) downward.