Self-Aligning Agitator and Door Bearing Assembly
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Solution Overview
Problem
Existing food roasting systems lack the ability to visually observe the roasting process while providing a stable mechanical system for automated agitation of beans, which is crucial for efficient and controlled roasting.
Innovation Solution
A roasting system with a self-aligning agitator and door bearing assembly that includes a glass plate for visual access and a tapered bearing assembly to align the agitator shaft with the roasting drum, ensuring proper alignment and agitation of beans during the roasting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a glass plate is added to the door for visual access, then the ability to visually monitor the roasting process is improved, but the mechanical stability and alignment of the agitator system may deteriorate
Solution Approach 1:
The door assembly is segmented into multiple functional components: the door structure, the glass plate for visual monitoring, and the bearing assembly for mechanical support. This segmentation allows each component to perform its specific function without compromising the others, maintaining both visual access and mechanical stability.
Solution Approach 2:
The bearing assembly acts as an intermediary element that connects the agitator shaft to the door structure. It mediates between the visual monitoring requirement (glass plate) and the mechanical stability requirement (agitator support), ensuring that the shaft remains properly aligned and supported while allowing the door to incorporate the glass plate for observation.
2Manufacturing precision
If a bearing assembly is integrated into the door to support the agitator shaft, then the mechanical alignment and stability are improved, but the device complexity increases
Solution Approach 1:
The bearing assembly is merged with the door structure, combining the support function into the existing door assembly rather than being a separate component. This integration provides precise alignment for the agitator shaft while minimizing the increase in overall device complexity by utilizing the door's existing structural framework.
Solution Approach 2:
The door assembly is designed to serve multiple functions: it provides structural support for the roasting chamber, incorporates the glass plate for visual monitoring, and integrates the bearing assembly for agitator shaft support. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving precise alignment.
3Reliability
If the agitator shaft is made self-aligning through a tapered bearing assembly, then the reliability of agitation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The tapered bearing assembly provides a self-aligning mechanism that dynamically adjusts the agitator shaft position. As the shaft is inserted, the taper geometry allows it to automatically align with the bearing hole, compensating for minor manufacturing variations. This dynamic self-alignment improves agitation reliability while reducing the stringency of manufacturing precision requirements compared to fixed alignment methods.
Data Source
AI summary
A bean roasting system includes a roasting drum, an agitator, and a door. The roasting drum has an inside surface extending from a back end to a front end. The agitator has blades mounted to an axial shaft. The axial shaft has an anterior end portion. The door is mounted rotationally relative to the roasting drum and includes a glass plate and a bearing assembly. The glass plate provides visual access to contents inside the roasting drum when the door is closed. The bearing assembly includes an outer housing and an inner bearing. The outer housing is mounted to the glass plate. The inner bearing defines a receiving hole that receives and supports the anterior end portion of the axial shaft when the door closed.