Hydraulic Force Amplifier for Handheld Pulling and Pressing Tools
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Solution Overview
Problem
Hand-held pulling and pushing devices are limited by their design, particularly the screw drive and drive unit, restricting their versatility in applying different levels of force for various operations.
Innovation Solution
A hydraulic force amplifier with a housing containing hydraulic fluid, featuring two pistons with adjustable positions and surfaces, connected to an electro-mechanically driven hand-held device, allowing for increased force transmission to tools via a mechanical tool connection, enabling flexible adaptation to different operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a screw drive with electric motor is used in hand-held pulling and pushing devices, then the device can be operated by a single person in a mobile manner, but the application possibilities are limited by the design of the device and restricted to specific force levels
Solution Approach 1:
The patent applies universality by designing a force amplifier that can be attached to existing hand-held pulling and pushing devices to extend their capability range. The amplifier unit with interchangeable tool connections (for both pulling and pressing tools) allows a single base device to perform multiple different work processes with varying force requirements, making the system multi-functional and adaptable to diverse automotive repair applications
2Power
If the screw drive design is used to convert rotary movement into linear movement, then the device can drive interchangeable tools with varying force levels, but the device design restricts flexibility for different work processes
Solution Approach 1:
The patent applies segmentation by dividing the force transmission system into modular components: a base hand-held device with screw drive, a separate force amplifier unit with hydraulic pistons, and interchangeable tool connections. This segmentation allows the amplifier to be attached or removed based on the specific work process requirements, providing flexibility while maintaining the core power transmission capability of the original device
Solution Approach 2:
The patent applies dynamics by making the tool connection adjustable relative to the connecting section. The adjustable connection allows the system to adapt its configuration dynamically based on the specific tool being used and the work process requirements, enabling the same device to handle both pulling and pressing operations with different force levels and geometries
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
Enables the hand-held device to apply increased tensile and compressive forces to tools, enhancing operational flexibility and adaptability for various tasks without the need for additional components, facilitating easy tool changes and use in confined spaces.
Implementation Method 1
the pressure generated during the adjustment by the hydraulic fluid arranged in the working chamber 8 for adjusting the second hydraulic piston 4
Implementation Method 2
the first hydraulic piston 3, which can be connected via its coupling section 24 to a drive element 22, 202 adjustable via the electromechanical drive
Implementation Method 3
the second hydraulic piston 4...with a second piston surface 7, which is larger than the first piston surface 6...so that the amplified pull-and-push forces are transmitted to the pull-and-push tool
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The invention relates to a handheld pulling and pushing device and a hydraulic power amplifier for a handheld pulling and pushing device for driving drawing and pressing tools. To provide a hydraulic power amplifier for an electromechanically driven, handheld pulling and pushing device, as well as a handheld pulling and pushing device that is easily and flexibly adaptable to different work processes, the hydraulic power amplifier comprises a housing body with at least one first working chamber filled with hydraulic fluid and a connecting section for detachably securing the hydraulic power amplifier to a connection section of the pulling and pushing device.Furthermore, the hydraulic power amplifier comprises a first hydraulic piston, displaceable within the first working chamber between a starting position and an end position, with a first piston area and a coupling section for connection to a drive element of the pulling and pushing device, which is adjustable relative to the connection section. The hydraulic power amplifier also comprises a second hydraulic piston, displaceable within the working chamber at a distance from the first hydraulic piston, with a second piston area larger than that of the first piston and a mechanical tool connection for pulling and pushing tools.