Mechanical 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 mechanical force amplifier is integrated with a hand-held pulling and pushing device, allowing for easy adaptation to different operations by decoupling the screw drive from the drive unit and connecting to a tool holder, which can hold various tools, and featuring a second screw drive with a smaller pitch to increase tensile and compressive forces, enabling higher torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a screw drive with a fixed pitch is used in the hand-held pulling and pushing device, then the device can perform basic pulling and pushing operations, but the device is limited in its ability to apply different levels of force for various operations
Solution Approach 1:
The device is divided into modular components: a base hand-held pulling/pushing device and a separate mechanical force amplifier. The amplifier can be attached when high force is needed and removed when it is not, allowing the system to adapt to different force requirements without permanently increasing device complexity.
Solution Approach 2:
The device transitions from a fixed configuration to a dynamic, reconfigurable system. The mechanical force amplifier with its adjustable second threaded spindle pitch allows the device to dynamically adapt its mechanical advantage ratio based on the specific operational requirements, enabling variable force application.
2Force
If the first threaded spindle has a fixed pitch, then the screw drive structure is simple, but the device cannot generate sufficiently high tensile and compressive forces for demanding applications
Solution Approach 1:
The mechanical force amplifier acts as an intermediary between the drive unit and the tool. It includes a second threaded spindle with adjustable pitch that provides an additional stage of mechanical advantage, multiplying the force output without requiring direct modification of the original screw drive structure.
Solution Approach 2:
The mechanical force amplifier is designed to be attached to the existing hand-held device, with the second threaded spindle system nested within or alongside the first threaded spindle assembly. This allows the force amplification mechanism to be integrated without completely redesigning the original structure.
3Adaptability or versatility
If the screw drive is permanently integrated with the drive unit, then the structure is stable and simple, but the device lacks flexibility for different operations requiring different force levels
Solution Approach 1:
The system is segmented into a permanent base unit (hand-held device with first threaded spindle) and a detachable force amplifier. This segmentation allows the amplifier to be attached only when high force operations are required, maintaining connection reliability through dedicated coupling mechanisms while providing operational flexibility.
Solution Approach 2:
The connection between the first and second threaded spindles transitions from fixed to dynamically adjustable. The second threaded spindle can be positioned at different pitches and securely coupled to the first spindle, allowing the system to dynamically adapt its mechanical configuration while maintaining reliable connections through proper coupling design.
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 mechanical force amplifier enhances the device's capability to apply increased pressing forces, allowing it to handle diverse operations with enhanced efficiency and flexibility, enabling the use of higher tensile and compressive forces beyond the original device's limitations.
Implementation Method 1
a second threaded spindle (26) which is rotatably mounted on a base body (25) and has a coupling section (23), and a second threaded nut (28) which is adjustably mounted in a non-rotatable manner on the second threaded spindle (26)
Implementation Method 2
designed to convert torque generated by the drive unit (4) into tensile and compressive forces that are higher than the tensile and compressive forces generated by the first screw drive (5)
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a handheld pulling and pushing device and a mechanical force amplifier for a handheld pulling and pushing device for driving drawing and pressing tools. The handheld pulling and pushing device for driving interchangeable tools comprises a drive unit with a battery-powered electric motor, a first threaded drive with a first threaded spindle rotatably mounted on a housing body and a first threaded nut rotatably mounted on the first threaded spindle and rotationally fixed to the housing body via a bearing unit, and a coupling unit connectable to a tool holder for transmitting the 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 handheld pulling and pushing device, as well as a handheld pulling and pushing device that is easily and flexibly adaptable to different work processes, 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 handheld pulling and pushing device and a tool connection for pulling and pushing tools.