Hydraulic Actuation Handle With Auto-Return Neutral Stop
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Solution Overview
Problem
Conventional hydraulic actuation devices used for rescue purposes require the operator to actively return the operation handle to a neutral position to stop the tool, posing a safety risk if the handle is accidentally released.
Innovation Solution
A hydraulic actuation device with a pressure oil supply mechanism and biasing means that automatically returns the operation handle to the initial position when released, stopping tool operation, and incorporates flow passage adjustment valves to control oil flow direction based on handle rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operation handle is held manually to operate the tool, then the tool can be actuated, but the operator must actively return the handle to stop operation creating safety risks
Solution Approach 1:
The operation handle is equipped with biasing means that automatically return the handle to its initial position when released by the operator. This self-service mechanism eliminates the need for the operator to manually reset the handle, ensuring automatic cessation of tool operation and improving safety while maintaining ease of use
Solution Approach 2:
The biasing means applies a preliminary counteracting force to the operation handle, preparing it to automatically return to the neutral position. This preliminary anti-action prevents unintended continuous operation by ensuring the handle will naturally revert to the off position, addressing the safety concern before it can manifest
2Productivity
If the operation handle is moved from initial position to operation position, then the tool operates, but accidental release could cause unintended activation
Solution Approach 1:
The automatic return mechanism through biasing means ensures the operation handle self-corrects to its neutral position upon release, preventing unintended activation while maintaining efficient operation during active use
Solution Approach 2:
Instead of requiring active action to stop the tool (returning the handle), the system is inverted so that releasing the handle automatically stops the tool. The normal state is off, and operation requires sustained input, reversing the conventional approach and eliminating the hazard of accidental continuous operation
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
Enhances safety by ensuring tool operation halts when the operator releases the handle, improving user safety and preventing unintended activation.
Implementation Method 1
biasing means configured to bias the operation handle toward the initial position when no external force is applied to the operation handle
Implementation Method 2
a pressure oil supply mechanism configured to send pressure oil from an oil chamber to the tool and return return oil from the tool to the oil chamber
Data Source
Figure 1
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AI summary
A hydraulic actuation device includes a tool, an actuation part 21 having a pressure oil supply mechanism 30 configured to send pressure oil from an oil chamber 28 to the tool and return return oil from the tool to the oil chamber 28, an operation handle 70 for adjusting oil passages for the pressure oil and the return oil in the pressure oil supply mechanism 30 and configured to be able to be moved from an initial position, and biasing means configured to bias the operation handle 70 toward the initial position when no external force is applied to the operation handle 70. When the operation handle 70 moves from the initial position, the tool is actuated by the actuation part 21. When the operation handle 70 is returned to the initial position by the biasing means, operation of the tool by the actuation part 21 is stopped.