Blind Rivet Nut Tool With Dual-Motor Shaft Threading and Setting
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Solution Overview
Problem
Existing powered blind rivet nut-setting tools lack efficient mechanisms for both rotating and translating the output shaft to effectively thread and set blind rivet nuts on workpieces, leading to incomplete or inconsistent fastening.
Innovation Solution
A blind rivet nut-setting tool equipped with two motors: one for rotating the output shaft and another for translating it, allowing precise control over the threading and setting process, along with a carrier mechanism that moves in tandem with the output shaft to apply the necessary forces for secure fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single motor is used to both rotate and translate the output shaft, then the device complexity is reduced, but the manufacturing precision and reliability of the threading and setting process deteriorate
Solution Approach 1:
The patent divides the drive system into two separate motors: a first motor dedicated to rotating the output shaft for threading the blind rivet nut, and a second motor dedicated to translating the output shaft for the setting stroke. This segmentation allows each motor to independently control its specific function, ensuring precise control over both rotational and translational movements, thereby resolving the contradiction between device complexity and manufacturing precision.
2Device complexity
If manual operation is used for threading and setting, then the device complexity is reduced, but the productivity and consistency of the fastening process deteriorate
Solution Approach 1:
The patent implements an automated system where the first motor automatically rotates the output shaft to thread the blind rivet nut onto the shaft, and the second motor automatically translates the output shaft to perform the setting stroke. This self-service automation eliminates manual intervention, significantly improving productivity and ensuring consistent, repeatable fastening operations while maintaining controlled device complexity through the use of two dedicated motors.
3Ease of operation
If the output shaft is translated manually, then the ease of operation is improved, but the reliability of the setting stroke deteriorates
Solution Approach 1:
The patent replaces manual mechanical translation of the output shaft with a second motor that automatically controls the translation movement. This substitution ensures that the setting stroke is performed with consistent, controlled force and displacement, significantly improving the reliability and consistency of the fastening process while maintaining ease of operation through automated control.
Data Source
AI summary
A blind rivet nut-setting tool includes an output shaft defining a longitudinal axis. The output shaft is moveable along the longitudinal axis between a first position and a second position. The blind rivet nut-setting tool further includes a first motor configured to rotate the output shaft about the longitudinal axis in response to an external force moving the output shaft in a rearward direction from the first position to the second position. The blind rivet nut-setting tool further includes a second motor configured to translate the output shaft along the longitudinal axis in the rearward direction.