Dual-Output Rivet Nut Drive for Adjustable Gear Ratios
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Solution Overview
Problem
Conventional electric rivet nut machines require two motors to achieve different rotation speeds, increasing cost, weight, and energy consumption, and require users to consult tables for parameter settings, making operation inconvenient.
Innovation Solution
An electric rivet nut machine with a single motor having two output shafts with different rotation speeds, equipped with adaptive gear sets that allow for adjustable gear ratios and intuitive parameter input through a control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If two different motors are used to generate different rotation speeds for the moving gear and coupling gear, then the rotation speeds can be controlled independently, but the cost, weight, and energy consumption increase
Solution Approach 1:
The patent combines two motor functions into a single motor by providing one motor with two output shafts that have different rotation speeds. The first output shaft drives the moving gear while the second output shaft drives the coupling gear, eliminating the need for two separate motors and reducing overall weight.
Solution Approach 2:
The single motor is segmented into two independent output shafts, each capable of rotating at different speeds. This segmentation allows independent control of the moving gear and coupling gear rotation speeds while using only one motor unit.
2Ease of operation
If a gear shaft is disposed horizontally between the motor and rivet nut drive unit to engage with both moving gear and coupling gear, then both gears can be driven simultaneously, but the distance between motor and rivet nut drive unit increases
Solution Approach 1:
The patent transitions from a horizontal gear shaft arrangement to a vertical arrangement where the single motor with two output shafts is positioned above the rivet nut drive unit. The first and second output shafts extend in different directions to engage with the moving gear and coupling gear respectively, reducing the horizontal distance while maintaining functional engagement.
3Area of stationary object
If the gear shaft is directly engaged with the motor and rivet nut drive unit with limited space, then the structure is compact, but no other gear sets can be disposed between them for proportioning rotation speeds
Solution Approach 1:
The patent makes the gear transmission system dynamic and adjustable by introducing changeable gear sets between the motor output shafts and the rivet nut drive unit gears. Users can swap different gear sets to achieve different rotation speed ratios, providing adaptability while maintaining a compact structure.
4Adaptability or versatility
If users input different values on the control panel to change motor torsion for different rivet nut specifications, then the motor can be adapted to different materials, but users need to check tables repeatedly which causes inconvenience
Solution Approach 1:
The control panel is designed to automatically identify the rivet nut specification when the user selects the material type, and automatically inputs the corresponding parameter values without requiring users to manually check tables. The system serves itself by having built-in knowledge of the correct parameters for each material specification.
Data Source
AI summary
An electric rivet nut machine comprises a motor having a first output shaft and a second output shaft; the first output shaft is connected with a first gear set, and the second output shaft is connected with a second gear set; and a rivet nut drive unit having a rivet nut shaft, a coupling gear and a moving gear; the coupling gear is engaged with the second gear set; the moving gear is engaged with the first gear set; through the first gear set and the second gear set of the motor respectively engaging with the rivet nut drive unit, and through the first output shaft and the second output shaft at two ends of the motor respectively engaging with the first gear set and the second gear set, different gear ratios can be formed, and better gear drive ratio can be produced for the rivet nut drive unit.