Compact Roller Oscillation via Nested Barrel Cam and Pulley Reduction
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Solution Overview
Problem
Existing compact barrel cam systems for oscillating rollers are cumbersome and cannot be contained within the roller shell, making them unsuitable for compact installations like 'drawer slide' configurations.
Innovation Solution
A compact barrel cam system utilizing an oscillating assembly with first and second opposed gudgeons connected by rods or the roller itself, featuring a reduction transmission assembly with differently toothed input, intermediate, and output pulleys, and a cam groove engaged by oscillation pins, allowing for axial oscillation of the roller within the shell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a compact barrel cam system is used to oscillate the roller, then the oscillation mechanism can be contained within the roller shell, but the mechanism becomes cumbersome and cannot be fully contained within the shell
Solution Approach 1:
The oscillation mechanism is nested within the roller shell by positioning the barrel cam, gudgeons, and connecting rods inside the shell's axial envelope. The barrel cam is mounted on the shaft, gudgeons are attached to the roller periphery, and connecting rods link them, creating a compact nested arrangement that fits within the shell while maintaining full oscillation functionality.
Solution Approach 2:
The oscillation mechanism utilizes the radial and axial dimensions of the roller shell by arranging components in three-dimensional space. The barrel cam extends radially from the shaft, gudgeons are positioned on the roller periphery, and connecting rods bridge the radial and axial spaces, effectively using available volume in multiple dimensions to contain the mechanism.
2Adaptability or versatility
If the oscillation mechanism is contained within the roller shell, then installation flexibility is enhanced, but the mechanism requires precise spatial arrangement of components
Solution Approach 1:
The oscillation mechanism is segmented into distinct functional modules: the barrel cam mounted on the shaft, gudgeons attached to the roller periphery, connecting rods linking them, and the cam groove engaged by oscillation pins. This segmentation allows each component to be independently positioned and adjusted, facilitating precise spatial arrangement while maintaining installation flexibility.
Solution Approach 2:
Connecting rods serve as intermediaries between the barrel cam and gudgeons, transmitting motion while accommodating spatial constraints. The rods bridge the distance between the cam's radial position and the gudgeons' peripheral position, enabling precise spatial arrangement of all components within the shell's envelope.
3Manufacturing precision
If a reduction transmission assembly with multiple pulleys is used, then the oscillation frequency is precisely controlled, but the mechanism requires more space and components
Solution Approach 1:
The reduction transmission assembly merges multiple pulleys and belts into a compact arrangement where the input pulley, intermediate pulleys, and output pulley are closely spaced on the shaft. The belts connect these pulleys in sequence, creating an integrated transmission system that achieves precise frequency control while minimizing the number of discrete components and their spatial footprint.
Solution Approach 2:
The transmission assembly utilizes the axial dimension of the shaft by arranging pulleys at different axial locations. This vertical stacking of pulleys and belts along the shaft's length allows the reduction transmission to be contained within the roller shell's axial envelope, achieving precise frequency control without excessive radial or lateral space requirements.
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
Enables efficient axial oscillation of rollers rolling along moving substrates within a compact envelope, reducing the need for external components and enhancing installation flexibility.
Implementation Method 1
A cam groove in an oscillation cam is engaged by one or more oscillation pin(s) operationally connected to the gudgeons. The oscillation mechanism comprises a reduction transmission assembly having differently toothed input, intermediate, and output pulleys.
Implementation Method 2
The oscillation mechanism comprises a reduction transmission assembly having differently toothed input, intermediate, and output pulleys.
Implementation Method 3
an oscillating assembly and an oscillation mechanism. The oscillating assembly comprises first and second opposed gudgeons rotatably mounted on a shaft, the gudgeons being connected by either a plurality of rods or by the roller itself.
Data Source
AI summary
A system for oscillating a roller driven by rolling contact with a moving substrate. An oscillating assembly comprises first and second opposed gudgeons rotatably mounted on a shaft, the gudgeons being connected by either a plurality of rods or the roller. An oscillation mechanism comprises a reduction transmission assembly having differently toothed input and output pulleys. A cam groove in an oscillation cam is engaged by one or more oscillation pin(s) connected to the gudgeons. An input drive pulley turns with the gudgeons, and an output pulley turns with the oscillation cam. An intermediate double-pulley has second and third pulleys on a common hub. First and second timing belts connect, respectively, the input pulley to the second hub pulley, and the third hub pulley to the output pulley. A currently preferred step-down ratio between the input pulley and the output pulley is about 391:1.