Rectilinear Screw Shaft Conveying Device Gradient Travel
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Solution Overview
Problem
Conventional screw drive type conveying devices struggle to maintain a predetermined speed on gradient routes due to slipping of drive wheels or friction drive wheels, especially with large and heavy conveying bodies, as they are not effectively designed to handle descending forces caused by gravity.
Innovation Solution
A conveying device with interlockingly coupled rectilinear screw shafts and a configuration of front and rear driven rollers that engage with the screw shafts, allowing continuous travel between horizontal and gradient route portions, ensuring propulsive force is always received by at least one roller, and utilizing a motor-driven screw system to maintain a fixed speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wheel drive type or friction drive type is used to propel a large and heavy conveying traveling body, then the structure can be simple, but the conveying traveling body cannot travel reliably on gradient routes due to slipping of drive wheels
Solution Approach 1:
The conveying traveling body is divided into multiple segments with front and rear driven rollers separately engaged with screw shafts. This segmentation allows independent engagement points that can better handle gradient forces, preventing slipping while maintaining structural feasibility
Solution Approach 2:
The conventional wheel drive or friction drive system is replaced with a screw drive system. The screw shafts engage with driven rollers through threaded mechanical interaction, providing positive engagement that prevents slipping on gradient routes while maintaining acceptable structural complexity
2Volume of moving object
If driven rollers are positioned closely together to reduce the size of the conveying traveling body, then the device size is reduced, but continuous engagement with screw shafts during route transitions cannot be ensured
Solution Approach 1:
The front driven roller is positioned to engage with the screw shaft in advance before the rear roller disengages. This preliminary engagement ensures continuous propulsive force during transitions between horizontal and gradient route portions, preventing gaps in engagement while optimizing the interval between rollers
Solution Approach 2:
The conveying traveling body is designed to dynamically adjust its position and orientation as it transitions between route portions. The interval between front and rear driven rollers is optimized to allow the body to maintain continuous engagement with screw shafts during dynamic movements, balancing compactness with reliable continuous engagement
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 reliable and continuous travel of conveying bodies along gradient routes by ensuring continuous engagement with screw shafts, preventing slipping and maintaining a predetermined speed, even on routes with large inclination angles, without the need for special curved screw shafts.
Implementation Method 1
a screw drive type conveying device, that is, a screw drive type conveying device, which propels a conveying traveling body along a traveling route by means of a motor-driven screw shaft juxtaposed along the traveling route
Implementation Method 2
a driven roller pivotally supported at the conveying traveling body so as to engage with the screw shaft
Data Source
AI summary
A conveying device has interlockingly coupled, rectilinear screw shafts which are driven by a motor. The screw shafts are juxtaposed to an inclined rectilinear portion of a gradient portion in a traveling route of a conveying traveling body and to at least fixed regions adjacent to the gradient portion of respective upper and lower horizontal route portions connected to respective ends of the gradient portion. The conveying traveling body has a pair of front and rear driven rollers engaging with the screw shafts, and an interval between the pair of front and rear driven rollers is set to a length not shorter than a rectilinear distance between end portions of the screw shafts positioned at respective sides of each of arcuate portions at respective upper and lower ends of the gradient portion to make the conveying traveling body travel continuously between the respective upper and lower horizontal route portions.