Hydraulic Handheld Device Adjustable Return Valve Pressure
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Solution Overview
Problem
Hydraulically operated handheld devices face challenges in efficiently handling workpieces of varying sizes and materials due to fixed working pressures, which can lead to inadequate processing and increased energy consumption.
Innovation Solution
The method involves a separately triggerable pressure increase or decrease to control the return valve's operation, allowing for adjustable working pressures by modifying the hydraulic pressure acting on the return valve, enabling the device to process different materials with improved precision and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed working pressure is used in the hydraulic chamber, then the device structure is simple, but the device cannot efficiently handle workpieces of varying sizes and materials
Solution Approach 1:
The patent applies dynamics by making the working pressure adjustable rather than fixed. The control unit dynamically adjusts the working pressure based on the size and material of the workpiece being processed. This allows the same device to efficiently handle diverse workpieces by adapting the hydraulic pressure to match the specific requirements of each workpiece, resolving the contradiction between adaptability and device complexity.
Solution Approach 2:
The patent changes the pressure parameter from a fixed value to an adjustable range. The control unit modifies the working pressure parameter according to the workpiece characteristics (size and material). This parameter change enables the device to process different materials with improved precision and energy efficiency while maintaining a relatively simple device structure, thus resolving the technical contradiction.
2Loss of energy
If the return valve opens automatically at a predefined working pressure, then the moving part returns to the end position reliably, but energy is consumed unnecessarily when processing smaller or softer workpieces
Solution Approach 1:
The patent implements feedback control where the control unit monitors the workpiece processing status and adjusts the working pressure accordingly. The control unit receives feedback about the workpiece characteristics and modifies the pressure setting to optimize energy consumption while ensuring the return valve opens at the appropriate pressure level for each specific workpiece, maintaining reliability while reducing unnecessary energy loss.
Solution Approach 2:
The return pressure is made dynamic rather than fixed at a predefined value. The control unit adjusts the return pressure based on the current workpiece requirements. This dynamic adjustment allows the system to consume less energy when processing smaller or softer workpieces while still ensuring reliable return movement of the moving part to the end position, resolving the contradiction between energy loss and reliability.
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 solution allows for adaptable working pressures, enhancing the device's ability to handle diverse workpieces while reducing energy consumption by enabling the return movement of the moving part at adjusted pressures, thus improving processing efficiency and safety.
Implementation Method 1
the moving part is moved into a working position due to the buildup of a hydraulic pressure, which is realized by filling a hydraulic chamber with hydraulic medium from a reservoir with the aid of the hydraulic pump
Implementation Method 2
the moving part can be automatically moved back from the working position into an end position upon reaching a predefined working pressure by opening the return valve
Data Source
AI summary
A hydraulically operated handheld device and a method of operating same are provided. The device includes a hydraulic pump, a moving part, a fixed part and a return valve with an associated valve seat. The moving part is moved into a working position due to the buildup of a hydraulic pressure by filling a hydraulic chamber with hydraulic medium from a reservoir with the aid of the hydraulic pump. The moving part can be automatically moved back from the working position into an end position upon reaching a predefined working pressure by opening the return valve. The hydraulic pressure acting upon the return valve is increased by a separately triggerable pressure increase, which results in opening of the return valve, in a hydraulic medium volume located upstream of the return valve in a flow direction of the hydraulic medium during the movement into the end position.