Handheld Screw-Drive Switching for Interchangeable Pulling Tools
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hand-held pulling and pushing devices have limited application options, restricting their versatility in performing various operations, such as setting blind rivets and carrying out punching processes, in motor vehicle workshops.
Innovation Solution
A hand-held device with a switching unit that allows decoupling of the screw drive from the drive unit, enabling the use of interchangeable tools and facilitating the transmission of tensile and compressive forces through a coupling unit to a tool holder, which can be adjusted between coupling and decoupling positions, and featuring a hollow spindle for independent rotation of a rotary shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the device uses a fixed tool holder design, then the structure is simple, but the application possibilities are limited
Solution Approach 1:
The tool holder is designed with a universal interface that can accommodate both pulling tools and pressing tools through interchangeable tool cartridges. The coupling unit with switching mechanism enables the same basic device to perform multiple functions (pulling, pressing, punching) by simply changing the tool cartridge, eliminating the need for multiple specialized devices while maintaining structural simplicity.
2Reliability
If the screw drive is always connected to the drive unit, then the structure is simple, but accidental adjustments cannot be prevented during overload
Solution Approach 1:
The switching unit provides a dynamic connection between the screw drive and drive unit, allowing the system to transition between connected and disconnected states. This dynamic coupling enables the operator to disengage the drive during overload conditions or potential hazards, preventing accidental adjustments while maintaining a relatively simple structural design through a straightforward switching mechanism.
3Adaptability or versatility
If additional tool holders are used for different tools, then tool versatility is improved, but the device complexity increases
Solution Approach 1:
The invention merges the function of multiple tool holders into a single universal tool holder design. By implementing a standardized coupling unit with a switching mechanism that can accommodate different tool cartridges (pulling tools, pressing tools, punching tools), the system achieves full tool versatility while maintaining a single integrated holder structure, thereby avoiding the complexity of multiple separate holders.
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 flexible operation by allowing the device to perform both pulling and pressing tasks with reliable force transmission, preventing accidental adjustments during overload, and allowing for the use of different tools without additional holders, enhancing safety and versatility.
Implementation Method 1
drive unit having a battery-operated electric motor
Implementation Method 2
a screw drive with a threaded spindle rotatably mounted on a housing body and a threaded nut rotatably mounted on the threaded spindle
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a handheld pulling and pushing device for driving interchangeable tools, comprising: - a drive unit with a battery-powered electric motor, - a threaded drive with a threaded spindle rotatably mounted on a housing body and a threaded nut rotatably mounted on the threaded spindle and rotationally fixed to the housing body via a bearing unit, and - a coupling unit connected to a tool holder for transmitting the tensile and compressive forces resulting from the direction of rotation of the threaded spindle from the threaded nut to the tool holder. To provide a handheld pulling and pushing device that is easy and flexible to use for different operations, the device includes a switching unit for coupling and decoupling the threaded drive from the drive unit.