Rivet Nut Power Tool With Automatic Pre-Fastening Detection
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Solution Overview
Problem
Conventional power tools require pressing the trigger twice to pre-fasten and deform rivet nuts, making the process inconvenient.
Innovation Solution
A power tool equipped with a pre-fastening module that includes first and second pre-fastening detecting members, which automatically start and stop the motor for pre-fastening the rivet nut, eliminating the need for multiple trigger presses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the trigger is pressed twice to perform pre-fastening and deforming steps respectively, then the rivet nut fastening process can be completed, but the operation becomes inconvenient and time-consuming
Solution Approach 1:
The power tool automatically performs the pre-fastening action before the deforming action without requiring manual intervention. The detecting members sense when the rivet nut is properly positioned and automatically initiate the pre-fastening rotation, eliminating the need for the user to press the trigger twice and saving time
Solution Approach 2:
The detecting members provide feedback about the rivet nut's position and state to the control system. This feedback mechanism allows the system to automatically determine when pre-fastening should begin and end, enabling seamless transition between operation stages without manual trigger presses
2Ease of operation
If automatic detection and control systems are added to eliminate multiple trigger presses, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The detecting members are integrated into the existing tool structure and automatically perform their sensing function without requiring separate control systems. The system uses the mechanical movement of existing components (connecting shaft, ball screw) to trigger the automatic control, allowing the tool to self-regulate the pre-fastening process
Solution Approach 2:
The detecting members serve multiple functions: they detect the rivet nut's position, determine when pre-fastening should begin, and control the duration of pre-fastening. This multi-functionality reduces the need for separate sensors and control mechanisms, thereby limiting the increase in device complexity
Data Source
AI summary
A power tool has a body, a trigger, a motor, a shaft set, a ball screw, and a pre-fastening module. The pre-fastening module has a first pre-fastening detecting member and a second pre-fastening detecting member. The first pre-fastening detecting member is moved with a connecting shaft of the shaft set in an axial direction. The second pre-fastening detecting member is located on a moving path of the ball screw. When a threaded spindle of the shaft set is inserted in a rivet nut and the connecting shaft is pressed to move inward the body, the first pre-fastening detecting member is moved to align with the second pre-fastening detecting member, and the motor is started automatically to drive the threaded spindle to rotate relative to the rivet nut. The motor will be stopped automatically after the rivet nut is pre-fastened on the threaded spindle, and this is convenient in use.