Hand Operated Press Pneumatic Reset Mechanism
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Solution Overview
Problem
Hand-operated presses face challenges with spring-based reset mechanisms due to non-linearity in restoring force and speed, which can be unsafe with light tools and insufficient for heavy tools, and pneumatic systems require a permanent compressed air connection, limiting autonomy.
Innovation Solution
A self-sufficient pneumatic reset mechanism using a pressure accumulator with two pressure chambers and a piston-cylinder unit, allowing for adjustable restoring force and speed through pressure regulation, enabling independent operation with minimal external air supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If spring-based return mechanisms are used, then the press can operate independently without external air supply, but the restoring force and speed cannot be adjusted and exhibit non-linearity across the working stroke
Solution Approach 1:
The patent applies pneumatic principles by using a pressure accumulator with compressed gas and a piston-cylinder unit to create a return mechanism. The compressed gas provides adjustable restoring force through pressure regulation, and the piston-cylinder arrangement enables controlled return speed, replacing the non-adjustable spring mechanism with a tunable pneumatic system.
Solution Approach 2:
The patent utilizes parameter changes by regulating the pressure of the compressed gas in the pressure accumulator to adjust the restoring force. The system allows dynamic adjustment of operational parameters (pressure, volume) to optimize the return mechanism performance for different pressing tool weights and operational requirements.
2Adaptability or versatility
If pneumatic cylinder arrangement with external compressed air connection is used, then restoring force and speed can be adjusted, but the press cannot operate independently without permanent air supply
Solution Approach 1:
The patent implements preliminary action by pre-storing compressed gas in the pressure accumulator before operation. This stored energy serves as a self-contained power source that enables the press to operate autonomously without requiring permanent external air supply connections during the pressing cycle.
Solution Approach 2:
The pressure accumulator system provides self-service functionality by containing its own compressed gas supply and pressure regulation mechanism. The system can independently generate and control the restoring force without external intervention or permanent connections to external air sources.
3Device complexity
If spring-based return mechanisms are used, then the structure remains simple, but the return force may be insufficient for heavy pressing tools or unsafe for light tools
Solution Approach 1:
The patent introduces dynamics by enabling adjustable restoring force and return speed through pressure regulation in the pneumatic system. This dynamic adjustability allows the return mechanism to adapt to different pressing tool weights, ensuring adequate force for heavy tools and controlled, safe operation for light tools, unlike fixed spring mechanisms.
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 system provides a reliable, adjustable, and safe reset mechanism that maintains pressure loss-free operation, allowing for a large number of cycles before refilling, enhancing autonomy and safety by regulating restoring force and speed effectively.
Implementation Method 1
pressure accumulator with a first pressure chamber which is fluidically connected to the first cylinder chamber, and with a second pressure chamber which is fluidically connected to the second cylinder chamber
Implementation Method 2
piston-cylinder unit with a piston movable in a cylinder, wherein the piston separates the cylinder into a first cylinder chamber and a second cylinder chamber
Data Source
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AI summary
A manually operated press (10) with an actuating element (18, 20) whose actuation is converted into a stroke movement of a press ram (24), wherein the press (10) further comprises a return mechanism (46) for returning the actuating element (18, 20), which counteracts the actuation of the actuating element (18, 20) and causes a return movement of the press ram (24) opposite to the stroke movement, wherein the return mechanism (46) comprises a piston-cylinder unit (48) with a piston (52) movable in a cylinder (50), wherein the piston (52) divides the cylinder (50) into a first cylinder chamber (68) and a second cylinder chamber (70), wherein the piston-cylinder unit (48) is coupled to the press ram (24) such that the piston (52) and the cylinder (50) move relative to each other during the stroke movement and the return movement. characterized bythat the reset mechanism (46) further comprises a pressure accumulator (56) with a first pressure chamber (62) which is fluidically connected to the first cylinder chamber (68), and with a second pressure chamber (64) which is fluidically connected to the second cylinder chamber (70).