Electric Overhead Conveyor Pressing Device for Inclined Rail Slipping
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Solution Overview
Problem
In electric monorail systems, the drive roller tends to slip on inclined sections of the support rail, leading to insufficient frictional forces and increased energy consumption due to unnecessary increased contact pressure, especially when the inclination angle is below a certain threshold.
Innovation Solution
A rocker element-based pressing device is implemented, where a counter-pressure roller is used to adjust the contact pressure of the drive roller based on the inclination angle, ensuring it only increases when necessary to prevent slipping, with a coupling mechanism that pivots to reduce the distance between the drive roller and support rail only when the inclination exceeds a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the contact pressure of the drive roller against the support rail is increased by reducing the distance between the axis of rotation and the support rail, then the frictional forces are increased and slipping is prevented, but the energy required to move the carrier carriage increases
Solution Approach 1:
The pressing device is designed to dynamically adjust the contact pressure of the drive roller against the support rail based on the actual inclination angle. The device remains in a released state during horizontal or slightly inclined operation, and only activates when the inclination exceeds a threshold angle, thereby dynamically optimizing the balance between preventing slipping and minimizing energy consumption
Solution Approach 2:
The system changes the contact pressure parameter conditionally based on the inclination angle threshold. When the inclination angle exceeds the threshold, the pressing device reduces the distance between the drive roller axis and the support rail, thereby increasing contact pressure and frictional forces to prevent slipping. Below the threshold, no additional pressure is applied
2Reliability
If the contact pressure of the drive roller is increased on all inclined sections, then slipping is prevented, but unnecessary energy is consumed on sections with inclination below the threshold angle
Solution Approach 1:
The pressing device transitions from a static always-active design to a dynamic threshold-based activation system. The device monitors the inclination angle implicitly through the mechanical state of the pressing mechanism and only increases contact pressure when the inclination exceeds the threshold angle, thereby eliminating unnecessary energy consumption on gentle slopes while maintaining reliability on steeper sections
Solution Approach 2:
The pressing device applies increased contact pressure locally only where needed - specifically on inclined sections exceeding the threshold angle. The bearing surface geometry ensures that the pressing force is activated only when the carrier carriage is on a sufficiently steep incline, creating a localized solution that addresses slipping prevention exactly where the physics requires it
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
This design maintains stable operation on inclines below the threshold angle without increasing energy consumption, ensuring reliable frictional forces and efficient movement by adjusting contact pressure only when required, thereby reducing energy expenditure and preventing slipping.
Implementation Method 1
it is important for reliable operation of the electric monorail system that the frictional forces between the drive roller and the support rail are always sufficiently large so that the carrier carriage moves on the support rail without the drive roller slipping
Implementation Method 2
a rocker element which is mounted on the running gear so as to be pivotable about a horizontal rocker axis between a first free rocker section and a second free rocker section
Implementation Method 3
a coupling member which is articulated to the second free rocker section, which can be connected to the object to be transported and can pivot about a pivot axis with respect to a vertical
Data Source
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AI summary
The electric trolley conveyor has a mounting rail (4), which has an inclined section opposite to a horizontal level. A pressing unit (38) is provided with mediums, by which a decrease of the distance between a rotational axis (21) of a driving pulley (20) and a bearing surface (18) of the mounting rail is prevented to a large extent.