Detachable Feed Roller With Cam-Driven Differential Transmission
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Solution Overview
Problem
Conventional automatic document feeders face issues with paper skew due to uneven contact timing between feed rollers, leading to frequent replacement needs and increased costs, as the friction between rollers decreases over time, causing slippage and requiring periodic replacement of feed rollers.
Innovation Solution
A detachable feed roller design featuring a rotating shaft, a fixed feed roller, a one-way feed roller, and a transmitting rotor with motion direction changing units, including actuating and cam parts, allows for adjustable driving force distribution and easy replacement, ensuring consistent paper feeding without skewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the friction between the feed roller and the paper is reduced with use, then the feed roller needs to be replaced periodically to avoid slippage of the paper, but replacing the feed roller increases cost and complexity
Solution Approach 1:
The feed roller assembly is divided into a rotating shaft and a detachable feed roller that can be separated and replaced independently. The feed roller is equipped with a connection structure that allows it to be attached to and detached from the rotating shaft, enabling easy replacement without replacing the entire assembly.
Solution Approach 2:
The feed roller is designed to be dynamically replaceable rather than fixed. The connection structure allows the feed roller to be easily attached and detached from the rotating shaft, transforming the static configuration into a dynamic one that can be adjusted and replaced as needed.
2Reliability
If a differential generating device is provided to balance the load between feed rollers, then subsequent paper skew is avoided, but the structure becomes more complex
Solution Approach 1:
The differential generating device is integrated into the rotating shaft structure, with differential gears and motion direction changing units that are segmented and modular. This allows the complex function to be achieved through coordinated simple components rather than a monolithic complex device.
Solution Approach 2:
The transmitting rotor acts as an intermediary between the rotating shaft and the one-way feed roller, transferring and adjusting the driving force. The motion direction changing units serve as intermediaries that redirect forces to achieve differential motion and balance loads between feed rollers.
3Ease of operation
If the feed roller is made detachable to reduce replacement cost and facilitate user replacement, then ease of operation is improved, but the connection structure requires additional design
Solution Approach 1:
The connection structure is segmented into a first connection structure on the rotating shaft and a corresponding structure on the feed roller. These separate connection elements are designed to mate together, allowing the feed roller to be easily attached and detached without complex fastening mechanisms.
Solution Approach 2:
The connection structure is designed to enable user-friendly self-service replacement. The feed roller can be easily attached to and detached from the rotating shaft by the user without requiring specialized tools or complex procedures, making the replacement process simple and intuitive.
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
The solution effectively prevents paper skew by maintaining even contact between rollers, reducing the need for frequent replacements and lowering costs, while ensuring the feed roller remains easy to detach and replace, thus enhancing the reliability and efficiency of the automatic document feeder.
Implementation Method 1
a first motion direction changing unit that includes an actuating part arranged around the rotating shaft and an actuating surface arranged on the transmitting rotor, the first motion direction changing unit pushing the transmitting rotor toward the one-way feed roller while the rotating shaft rotates forward relative to the transmitting rotor
Implementation Method 2
a second motion direction changing unit that includes a cam part arranged around the one-way feed roller and a cam surface arranged on the transmitting rotor, the second motion direction changing unit pushing the transmitting rotor away from the one-way feed roller while the one-way feed roller rotates forward relative to the transmitting rotor
Implementation Method 3
a surface of each of the transmission blocks in contact with the actuating block while the transmission blocks rotate forward is set as a sloped surface, and a surface of each of the transmission blocks opposite to the sloped surface is set as a stepped surface
Data Source
AI summary
A detachable feed roller for using in the automatic feeder includes: a rotating shaft provided with a first connection structure arranged at the end of the rotating shaft and an actuating part; a fixed feed roller arranged around the rotating shaft and driven by the rotating shaft; a one-way feed roller arranged around the rotating shaft and provided with a cam part; a transmitting rotor arranged around the rotating shaft and, the transmitting rotor being disposed between the actuating part and the cam part; wherein, the transmitting rotor is pushed toward the one-way feed roller while the rotating shaft rotates forward in accordance to the transmitting rotor; and pushed away from the one-way feed roller while the one-way feed roller rotates forward in accordance to the transmitting rotor.