Dual-Piston Hydraulic Force Amplifier for Variable Pulling Force
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Solution Overview
Problem
Hand-held pulling and compression devices with electric motor-driven screw drives have limited application possibilities due to their design, restricting the range of forces and operations they can perform.
Innovation Solution
A hydraulic force amplifier with a housing filled with hydraulic fluid, featuring a first and second displaceable hydraulic piston, where the second piston surface is larger than the first, amplifies tensile and compressive forces and allows for adjustable connection to a drive element and tool, enabling flexible adaptation to different operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a screw drive with electric motor is used in hand-held pulling and compression devices, then the device can be made portable and electrically driven, but the range of forces and operations is limited by the design of the screw drive and drive unit
Solution Approach 1:
The patent introduces a hydraulic force amplifier that uses hydraulic fluid and pistons to amplify the output force of the electric motor. The hydraulic system allows for variable force multiplication ratios, enabling the same motor to deliver different force levels by adjusting hydraulic pressure, thus expanding the range of operations without requiring multiple motors or complex mechanical transmissions.
Solution Approach 2:
The invention changes the operational parameters of the system by introducing hydraulic pressure as a controllable variable. By adjusting the hydraulic pressure and piston surface area ratios, the output force can be continuously varied, allowing the device to adapt to different operational requirements (different forces and operations) while maintaining the same basic mechanical structure.
2Force
If the piston surface area is increased to amplify force, then the output force increases, but the device size and weight increase
Solution Approach 1:
The hydraulic force amplifier uses fluid pressure to transmit and amplify force efficiently. The hydraulic system allows for high force multiplication with relatively compact components, as the force is amplified through pressure differential rather than direct mechanical leverage, reducing the overall size and weight compared to pure mechanical amplification 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
The hydraulic force amplifier increases the range of forces that can be applied to pulling and pressing tools, allowing for easy switching between original and amplified forces, enhancing the versatility and effectiveness of hand-held pulling and compression devices.
Implementation Method 1
a first working chamber (8) delimited by an inner wall (5) of the housing body (2) and by the first piston surface (6) of the first hydraulic piston (3) and the second piston surface (7) of the second hydraulic piston (4), which faces the first piston surface (6), and filled with a hydraulic fluid
Implementation Method 2
a first hydraulic piston (3) arranged in the first working chamber (8) so as to be displaceable between a starting position and an end position, with a first piston surface (6) and a coupling section (24) for connection to a drive element of the pulling and compression device
Implementation Method 3
a second hydraulic piston (4) arranged displaceably in the working chamber (8) at a distance from the first hydraulic piston (3) and having a second piston surface (7) which is larger than the first piston surface (6)
Data Source
AI summary
The invention relates to a hand-held pulling and compression device and a hydraulic force amplifier for a hand-held pulling and compression device for driving pulling and pressing tools. In order to provide a hydraulic force amplifier for an electro-mechanically driven, hand-held pulling and compression device and a hand-held pulling and compression device which can be easily and flexibly adapted to different operations, it is provided that the hydraulic force amplifier has a housing body having at least one first working chamber filled with hydraulic fluid and having a connecting section for detachably fixing the hydraulic force amplifier to a connection section of the pulling and compression device. In addition, the hydraulic force amplifier has a first hydraulic piston which is arranged in the first working chamber so as to be displaceable between a starting position and an end position and which has a first piston surface and a coupling section for connection to a drive element of the pulling and compression device which is adjustable relative to the connection section. Furthermore, the hydraulic force amplifier has a second hydraulic piston which is displaceably arranged in the working chamber at a distance from the first hydraulic piston and has a second piston surface which is larger than the first piston surface and a mechanical tool connection for the pulling and pressing tool.