Hydraulic Hand Tool Oil-Return Control With Preset Timing
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Solution Overview
Problem
Conventional hydraulic hand tools require manual and continuous user intervention to control the amount of hydraulic oil return, leading to inconvenience and inconsistency in the oil return process.
Innovation Solution
The hydraulic hand tool incorporates a first and second oil-return channel with an oil-return-controlling mechanism, featuring a control module, blocking unit, and driving assembly to automate the oil-return process, allowing the user to set a preset time for the oil-return operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual continuous pressing of oil discharge rod is used, then hydraulic oil can return to oil-storage space, but user convenience deteriorates and oil return amount becomes variable
Solution Approach 1:
The system uses the piston assembly's own movement and the elastic unit's stored energy to automatically return hydraulic oil to the oil-storage space without requiring continuous manual pressing. The piston assembly serves dual purposes: both pressing the blocking unit to enable oil return and then automatically retracting to block the channel again.
Solution Approach 2:
The elastic unit is pre-loaded during the pressing phase, storing energy that will be used to automatically retract the blocking unit after a predetermined time. This preliminary energy storage enables the automated action without requiring continuous user input.
2Manufacturing precision
If manual control of oil-return timing is required, then oil return can be achieved, but operation complexity increases and consistency deteriorates
Solution Approach 1:
The system dynamically adjusts the blocking unit's position based on the piston assembly's movement and the elastic unit's expansion. The blocking unit transitions from a static manual control point to a dynamic component that automatically responds to the hydraulic system's state, ensuring consistent oil return amounts.
Solution Approach 2:
The system inherently feedbacks through the elastic unit's expansion and contraction in response to the piston assembly's position. This mechanical feedback ensures that the blocking unit returns to the correct position automatically, maintaining consistent oil return without complex electronic controls.
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 enables automated and consistent oil return by allowing the user to set the oil-return amount once, eliminating the need for continuous manual control, thereby enhancing user convenience and consistency.
Implementation Method 1
The elastic unit presses against the blocking unit and tends to make the blocking unit block the first oil-return channel and the second oil-return channel
Implementation Method 2
The driving assembly can make the blocking unit resist the elastic unit such that the first oil-return channel and the second oil-return channel communicate with each other
Implementation Method 3
The hydraulic oil can pass from the first oil-storage space into the second oil-storage space through the oil-inlet channel. The hydraulic oil can pass from the second oil-storage space into the first oil-return channel. The hydraulic oil can pass from the first oil-return channel into the first oil-storage space through the second oil-return channel
Implementation Method 4
the control module controls the driving assembly to rotate the cam away from the linkage mechanism
Data Source
AI summary
A hydraulic hand tool has a first oil-return channel, a second oil-return channel, and an oil-return-controlling mechanism. Hydraulic oil can carry out the oil-return process through the first oil-return channel and the second oil-return channel. The oil-return-controlling mechanism has a control channel, a blocking unit, an elastic unit, a driving assembly, and a control module. The control channel communicates with the first oil-return channel and the second oil-return channel. The blocking unit is mounted in the control channel. The elastic unit presses against the blocking unit to block the control channel and thus isolate the first oil-return channel and the second oil-return channel. The driving assembly is controlled by the control module. The driving assembly makes the blocking unit abut against the elastic unit and move, and thus the first oil-return channel and the second oil-return channel communicate with each other.