Self-Aligning Auger Drive Coupling for Hopper Reinstallation
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Solution Overview
Problem
Non-technical operators often misalign the shaft and motor assembly when replacing the hopper in beverage makers, leading to potential damage to the interface between the motor and hopper due to improper reinstallation.
Innovation Solution
A self-aligning auger drive assembly with a coupling and compression spring mechanism that automatically aligns the shaft and motor assembly during reinstallation, preventing stress on the components and ensuring proper engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the hopper is removed and reinstalled by non-technical operators, then the hopper can be refilled and maintained, but misalignment of the shaft and motor assembly may occur causing damage to the interface
Solution Approach 1:
The coupling mechanism automatically performs the alignment function when the hopper is reinstalled. The spring-loaded coupling extends to engage with the driver, and the rotation feature allows self-alignment without requiring precise manual positioning by operators. The system serves itself by detecting misalignment and automatically correcting it through the rotation mechanism.
Solution Approach 2:
The coupling's position parameter is made variable through the spring mechanism, allowing it to extend and retract. The coupling can move radially to accommodate misalignment and rotate to achieve proper alignment, changing its positional parameters dynamically rather than requiring fixed precise positioning during installation.
2Manufacturing precision
If a rigid coupling is used to ensure precise alignment, then alignment accuracy is improved, but stress is transmitted to the auger drive assembly components during misalignment
Solution Approach 1:
The compression spring provides cushioning before misalignment damage can occur. When the hopper is installed with misalignment, the spring compresses to absorb the misalignment stress, preventing it from being transmitted to the auger, shaft, or motor assembly. This beforehand cushioning protects the components from stress during the installation process.
Solution Approach 2:
The coupling is designed with dynamic characteristics through the spring mechanism, allowing it to flex and rotate as needed. Rather than being a fixed rigid connection, the coupling can dynamically adjust its position and orientation to accommodate misalignment, transforming a static precision requirement into a dynamic adaptation capability.
3Manufacturing precision
If manual alignment procedures are required, then alignment precision can be achieved, but the complexity and time required for hopper replacement increases
Solution Approach 1:
The system performs its own alignment function automatically. The spring-loaded coupling extends to engage the driver, and the rotation feature allows the coupling to self-align with the driver without requiring external alignment tools or procedures. The mechanism serves itself by detecting and correcting alignment issues automatically during installation.
Solution Approach 2:
The spring-loaded coupling acts as an intermediary between the hopper and the motor assembly. It mediates the connection by absorbing misalignment stresses and facilitating automatic alignment through rotation, eliminating the need for complex manual alignment procedures while ensuring precise final alignment.
4Reliability
If the coupling is always extended to engage the driver, then reliable engagement is ensured, but stress is applied to the auger drive assembly during misalignment
Solution Approach 1:
The coupling's extended position is made dynamic rather than static. The spring mechanism allows the coupling to extend when engaged with the driver for reliable power transmission, but retract when misalignment is detected to prevent stress. This dynamic positioning provides both reliable engagement and stress protection depending on the alignment condition.
Solution Approach 2:
The spring mechanism provides cushioning by allowing the coupling to retract before stress damage can occur. When misalignment is present, the coupling can compress back into the hopper wall opening, preventing stress from being applied to the drive components while maintaining the capability for reliable engagement when properly aligned.
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
Facilitates quick and easy realignment of the shaft and motor assembly, reducing the risk of damage and ensuring smooth operation by allowing the system to verify proper positioning and product presence before activation.
Implementation Method 1
A compression spring along the shaft causes the coupling to extend outwardly to mate with the driver during this alignment rotation which prevents stress to the auger drive assembly components
Data Source
AI summary
Disclosed is a self-aligning auger drive assembly. The assembly includes a hopper with an auger supported therein. A shaft is connected to and extends from the auger externally from the hopper. A coupling is associated with the shaft and is operatively associated with a biasing device which creates an engaging force to promote engagement of the coupling with a motor assembly driver. A portion of the coupling defines a recess which receives at least a portion of the driver as the driver is rotated.