Banknote Storage Unit Coaxial Sprocket Design
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Solution Overview
Problem
Existing banknote stores have bulkiness issues due to sprockets being on the same plane with offset axes and motors located at the rear, leading to difficulties in maintaining correct belt tension and requiring more components, which affects storage capacity and efficiency.
Innovation Solution
The banknote store design features coaxially mounted sprockets on a single shaft with magnetic joints and a single motor, allowing offset belt winding and controlled tension through a specific motion transmission system, reducing bulk and ensuring correct belt tension in all operation conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If sprockets are arranged on the same plane with offset axes and motors are placed at the rear, then the store can accommodate multiple components, but the bulk of the store increases substantially in the direction parallel to the axis of the sprockets and roller
Solution Approach 1:
The sprockets are arranged coaxially on the same shaft instead of on the same plane with offset axes. This dimensional reconfiguration from planar offset arrangement to axial coaxial arrangement reduces the bulk of the store in the direction parallel to the roller axis while maintaining all necessary component functions.
2Volume of moving object
If sprockets are mounted on the same shaft coaxially, then the bulk of the store is reduced, but it becomes more difficult to maintain correct belt tension in all operation conditions
Solution Approach 1:
The magnetic joint between the sprocket and shaft provides a dynamic, controllable connection that automatically adjusts to maintain correct belt tension during both storage and release operations. The magnetic coupling strength can be modulated to ensure reliable tension control regardless of the coaxial mounting configuration.
Solution Approach 2:
The magnetic joint replaces traditional mechanical coupling mechanisms (such as keys, set screws, or gear teeth) with a magnetic field-based connection. This substitution enables more precise and reliable tension control while accommodating the compact coaxial sprocket arrangement on the same shaft.
3Device complexity
If multiple motors are used to move the roller and sprockets, then the functionality is more robust, but the store requires more components and increased bulk
Solution Approach 1:
A single motor is used to drive both the roller and the coaxially mounted sprockets through a shared drive mechanism. This merging of drive functions into one motor reduces the number of components and minimizes the bulk of the store while maintaining the ability to perform both storage and release operations.
Solution Approach 2:
The single motor is designed to perform multiple functions: driving the roller for banknote storage/release and simultaneously driving the coaxially mounted sprockets for belt advancement. This multi-functional approach eliminates the need for separate motors for each component.
Data Source
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AI summary
A banknote store comprises a banknote storage roller (17), two banknote conveyor belts (26, 27) and two collection sprockets (18, 19) of said belts, each belt (26, 27) being wound on one side to the storage roller (17) and on the other to one of the collection sprockets (18, 19), the two belts being arranged to come into contact with the banknotes respectively on opposite faces, handling means being present to move the roller, the sprockets and the belts so as to alternatively realize the storage of the banknotes on the roller or their release from the store. Said collection sprockets (18, 19) are mounted on a same shaft (20).