Mechanical Force Amplifier for Variable-Force Hand Tools
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Solution Overview
Problem
Hand-held pulling and compression devices have limited application possibilities due to their design, particularly the screw drive and drive unit, restricting their ability to handle different force levels required for various work operations.
Innovation Solution
A mechanical force amplifier is introduced, which can be detachably connected to the hand-held device, featuring a coupling unit that transmits increased tensile and compressive forces to the tool holder, allowing for flexible adaptation to different operations by converting the torque of the drive unit into higher forces using a second screw drive with a smaller pitch, and a switching unit for easy decoupling and coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a screw drive with a fixed pitch is used in the hand-held device, then the device can operate with a specific force level, but the application possibilities are limited when different force levels are required for various work operations
Solution Approach 1:
The device is divided into two independent drive systems: the original screw drive for light-duty operations and an additional mechanical force amplifier for heavy-duty operations. This segmentation allows each subsystem to be optimized for specific force requirements while maintaining overall system versatility.
Solution Approach 2:
A mechanical force amplifier is introduced as an intermediary device between the drive unit and the tool holder. This amplifier contains a second screw drive with a smaller pitch that converts the drive unit's rotational movement into amplified linear forces, enabling the hand-held device to handle both light and heavy-duty operations without redesigning the entire system.
2Force
If the screw drive pitch is reduced to increase force output, then higher pressing forces can be achieved, but the device loses flexibility for different force requirements
Solution Approach 1:
The system dynamically adapts its force output by switching between two screw drives with different pitches. The first screw drive with larger pitch provides lower forces for light-duty operations, while the second screw drive with smaller pitch provides higher forces for heavy-duty operations. This dynamic configuration allows the device to optimize force output based on operational requirements.
Solution Approach 2:
The mechanical force amplifier changes the pitch parameter of the screw drive by providing a second threaded spindle with a smaller pitch than the original. This parameter change enables the system to generate higher forces while maintaining the ability to switch between different pitch values for different operational needs.
3Adaptability or versatility
If the hand-held device is redesigned to accommodate different force levels, then versatility improves, but the device complexity and redesign requirements increase significantly
Solution Approach 1:
The mechanical force amplifier serves multiple functions: it amplifies forces for heavy-duty operations, maintains compatibility with the existing drive unit, and can be integrated into the existing device architecture. This multi-functionality allows the hand-held device to handle both light and heavy-duty operations without requiring complete redesign.
Solution Approach 2:
The force amplifier acts as an intermediary module that interfaces with the existing drive unit and tool holder, preserving the original device architecture while adding heavy-duty capability. This approach minimizes redesign requirements and maintains ease of manufacture for the base device.
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 operate with increased pressing forces, allowing it to handle a wider range of tools and operations by amplifying the forces transmitted to the tools, enhancing its versatility and adaptability without the need for significant redesign.
Implementation Method 1
a second screw drive (24) with a second threaded spindle (26) mounted rotatably on a base body (25) and having the coupling section, and a second threaded nut (28) mounted on the second threaded spindle (26)
Implementation Method 2
designed in such a way that the torque generated by the drive unit of the pulling and compression device is converted by means of the force amplifier into higher tensile and compressive forces
Data Source
AI summary
The invention relates to a hand-held pulling and compression device and a mechanical force amplifier for a hand-held pulling and compression device for driving pulling and pressing tools. The hand-held pulling and compression device for driving interchangeable tools has a drive unit comprising a battery-operated electric motor, a first screw drive with a first threaded spindle mounted rotatably on a housing body and a threaded nut mounted rotatably on the first threaded spindle and non-rotatably on the housing body via a bearing unit, and a coupling unit connectable to a tool holder for transmitting tensile and compressive forces resulting from the direction of rotation of the first threaded spindle from the first threaded nut to the tool holder. In order to provide a mechanical force amplifier for a hand-held pulling and compression device and a hand-held pulling and compression device which can be easily and flexibly adapted to different work operations, it is provided that the mechanical force amplifier has a connecting section for detachably fixing the mechanical force amplifier to a connection section of the housing body of the hand-held pulling and compression device and a tool connection for pulling and compression tools.