Remanufacturing Drive Gear for OPC Drum Engagement
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Solution Overview
Problem
Existing imaging cartridges, such as toner cartridges, often become unusable due to worn or damaged OPC drums, leading to unnecessary disposal, despite potential for refurbishment. The challenge lies in providing an effective replacement drive gear that can engage with the OPC drum and printer drive mechanism during remanufacturing.
Innovation Solution
A drive gear design featuring a cylindrical shaft with three prongs extending longitudinally from its end surface, which engages a helical recess in the printer's drive mechanism, allowing for efficient rotation and potential additional component drive in the imaging cartridge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a replacement drive gear is provided for the OPC drum during remanufacturing, then the imaging cartridge can be refurbished and extended for further use, but the complexity of the remanufacturing process increases due to the need to replace worn components
Solution Approach 1:
The drive gear is segmented into a body portion and a shaft portion that can be separately manufactured and assembled. The shaft is inserted through the body and secured, allowing the drive gear to be replaced as modular components during remanufacturing, reducing the complexity of the overall replacement process while extending cartridge service life
Solution Approach 2:
The drive gear design with three prongs extending from the shaft provides universal engagement capability with the helical recess in the OPC drum. This multi-functional design allows the same drive gear structure to engage with different drum types and configurations, simplifying the remanufacturing process by using a standardized component across various cartridge models
2Reliability
If the drive gear is designed with three prongs extending from the shaft, then engagement with the helical recess is improved for reliable rotation, but the manufacturing precision requirements increase to ensure proper alignment and fit
Solution Approach 1:
The drive gear features three asymmetrically positioned prongs extending from the shaft at specific angular intervals. This asymmetric configuration provides unique engagement geometry with the helical recess, ensuring reliable rotational engagement while the asymmetric design inherently compensates for minor manufacturing variations through the geometric relationship between the three prongs
Solution Approach 2:
The prongs are pre-positioned on the shaft during manufacturing with predetermined angular spacing and orientation. This preliminary positioning ensures that when the drive gear is assembled into the imaging cartridge, the prongs are already aligned to engage the helical recess correctly, reducing the need for high-precision field adjustments and ensuring reliable engagement from installation
Data Source
AI summary
A drive gear for a generally cylindrical imaging component. The drive gear includes a body for engaging the generally cylindrical imaging component; a cylindrical shaft attached to the body, the cylindrical shaft having an end surface; and lobes extending longitudinally outward from the end surface.