Pivoting Roller Carriage for Loop-Wound Guide Rail Stability
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Solution Overview
Problem
Existing transport systems for products face instability and increased roller wear when transitioning between straight and curved portions of a loop-wound guide rail, leading to inaccurate product orientation and rapid roller degradation.
Innovation Solution
A transport system with a guide rail and carriage featuring pairs of rollers mounted on pivoting shafts, allowing continuous contact with the internal and external walls of the guide rail at all directions, reducing stress and wear by adapting orientation without force or stress during direction changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rollers are fixed in a predetermined configuration on the carriage, then the structure is simple and easy to manufacture, but the carriage becomes unstable during transitions from straight to curved portions and roller wear increases
Solution Approach 1:
The roller support structure is made dynamic by allowing the support element to rotate about an axis perpendicular to the carriage. This rotation enables the rollers to automatically adjust their orientation to remain tangent to the guide rail walls during transitions between straight and curved portions, maintaining continuous contact and stability without requiring complex active control mechanisms
Solution Approach 2:
The roller system is segmented into multiple rollers (first and second rollers) mounted on a common support element that can rotate. This segmentation allows each roller to independently contact the internal and external walls of the guide rail respectively, while the support element's rotation coordinates their collective orientation to adapt to changing rail geometry
2Duration of action of stationary object
If rollers are fixed in a predetermined configuration, then manufacturing is easier, but roller wear increases due to loss of contact and greater rolling friction
Solution Approach 1:
The rotatable support element provides continuous dynamic adjustment of roller orientation, ensuring that rollers maintain optimal tangential contact with the guide rail walls throughout the entire loop-wound pathway. This eliminates periods of loss of contact and reduces rolling friction, thereby extending roller lifespan without requiring complex replaceable or adjustable mechanisms
Solution Approach 2:
The rotational capability of the support element ensures continuous useful action by maintaining uninterrupted tangential contact between rollers and guide rail walls. This continuous contact prevents the loss of contact that leads to increased wear and friction, allowing the rollers to operate smoothly through all portions of the loop-wound guide rail including transitions
3Reliability
If rollers maintain contact with guide rail walls during direction changes, then carriage stability is improved, but the fixed configuration causes increased stress and wear on rollers
Solution Approach 1:
The rotatable support element dynamically adjusts the roller configuration to maintain tangential contact with the guide rail walls during direction changes. This dynamic adaptation ensures reliable positioning and orientation of the carriage while simultaneously reducing stress and wear on the rollers by eliminating forced contact at non-tangential angles
Solution Approach 2:
The orientation parameter of the roller support structure is changed dynamically through rotation about the perpendicular axis. This parameter change allows the rollers to adapt their contact angle with the guide rail walls, maintaining optimal tangential contact that reduces stress and wear while ensuring reliable carriage positioning during direction changes
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
Ensures stable carriage and product orientation during direction changes while minimizing roller wear, extending the lifespan of the rollers and maintaining precise positioning.
Implementation Method 1
a first series of rollers is predisposed on the carriage in such a way that the rollers can roll on the internal wall of the guide rail, and a second series of rollers in such a way that they are in contact and can roll on the external wall of the guide rail
Data Source
AI summary
A transport system includes a guide rail having a loop-wound pathway with straight portions and curved portions linking the straight portions. A carriage is movable along the guide rail, a first and a second shaft being mounted on the carriage transversely to the carriage movement direction. A first pair of rollers are mounted rotatably on the first shaft so that a first roller contacts the internal wall of the guide rail and a second roller contacts the external wall of the guide rail. A second pair of rollers mounted rotatably on the second shaft include a first roller in contact with the internal wall of the guide rail and a second roller in contact with the external wall. The first and the second shaft are mounted on the carriage for pivoting about an axis perpendicular to the carriage.