Spring-Return Hydraulic Handle for Fail-Safe Tool Stopping
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Solution Overview
Problem
Conventional hydraulic actuation devices used for rescue purposes require operators to actively return an operation handle to a initial position to stop the tool's operation, which may not enhance safety as the tool can continue operating if the handle is released.
Innovation Solution
A hydraulic actuation device with a pressure oil supply mechanism and an operation handle that automatically returns to the initial position when no external force is applied, stopping the tool's operation, utilizing biasing means and flow passage adjustment valves to control oil passages and seal pins for smooth operation and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the operation handle is manually returned to the initial position to stop the tool, then the tool operation can be controlled, but the safety is not sufficiently improved as the tool may continue operating if the handle is accidentally released
Solution Approach 1:
The operation handle is equipped with biasing means (spring) that automatically returns the handle to the initial position when released, enabling the system to self-correct and stop tool operation without requiring active user intervention. This self-service mechanism ensures safety by preventing unintended continuous operation.
Solution Approach 2:
The biasing means is pre-configured to apply a returning force to the operation handle, creating a preliminary counter-action that opposes any displacement from the initial position. This preliminary anti-action ensures that if the handle is accidentally released, it automatically returns to the safe initial position, preventing harmful continuous operation.
2Speed
If the operation handle is held continuously to maintain tool operation, then the tool remains active for rapid response, but the safety risk increases if the handle is accidentally dropped or released
Solution Approach 1:
The operation handle transitions from a static held position to a dynamic state where it can be quickly actuated and then automatically returns. The biasing means enables the handle to be held during operation but automatically returns it when released, creating a dynamic safety mechanism that responds to user intent while preventing unintended continuous operation.
Solution Approach 2:
The biasing means provides continuous mechanical feedback to the operation handle, constantly applying a returning force that becomes active when the handle is released. This feedback mechanism immediately signals the system state change and automatically corrects unintended handle position, preventing harmful continuous operation while allowing rapid intentional actuation.
3Reliability
If a simple operation handle without automatic return mechanism is used, then the device structure remains simple, but the safety cannot be improved as the tool does not stop automatically when the handle is released
Solution Approach 1:
The operation handle incorporates biasing means that provide automatic return functionality, enabling the system to self-correct and stop tool operation without requiring complex external control systems. This self-service approach improves safety through a relatively simple mechanical addition rather than complex electronic or hydraulic control systems.
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 the tool stops automatically when the operation handle is released, preventing unintended operation and improving user safety during rescue operations.
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
an actuation part having a pressure oil supply mechanism configured to send pressure oil from an oil chamber to the tool
Data Source
AI summary
A hydraulic actuation device includes a tool, an actuation part having 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, an operation handle for adjusting oil passages for the pressure oil and the return oil in the pressure oil supply mechanism and configured to be able to be moved from an initial position, and biasing means configured to bias the operation handle toward the initial position when no external force is applied to the operation handle. When the operation handle moves from the initial position, the tool is actuated by the actuation part. When the operation handle is returned to the initial position by the biasing means, operation of the tool by the actuation part is stopped.