Guide Roller Layout for Low-Wear Curved Transport Paths
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Solution Overview
Problem
Existing transport systems experience significant wear on rolling members due to uneven friction distribution and loss of contact between wheels and guide profiles, particularly when transitioning from straight to curved portions, affecting stability and orientation of products.
Innovation Solution
The transport system employs independent pairs of rollers on each guide profile, with a single pair on the first guide profile and two pairs on the second, mounted on rotation shafts arranged in a triangular configuration, allowing for autonomous reaction to stresses and maintaining contact during curved portions, reducing friction and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wheels are used with constant distance between contact surfaces, then the carriage can be moved along the guide path, but uneven friction distribution causes significant wear on rolling members
Solution Approach 1:
The rolling members are segmented into multiple independent rollers instead of a single wheel. Each roller can independently adjust its position and contact force, allowing differential friction distribution across the guide profile surfaces. This segmentation enables each roller to adapt to local variations in the guide profile while maintaining overall carriage stability.
Solution Approach 2:
The rolling members are designed with dynamic adjustment capability, allowing the distance between contact surfaces to vary rather than remain constant. This dynamic configuration enables the rollers to automatically adjust their positions in response to guide profile imperfections and curvature changes, optimizing contact forces and reducing wear on individual rolling members.
2Reliability
If wheels rotate at same velocity, then the carriage moves smoothly, but greater friction on one contact surface leads to greater wear
Solution Approach 1:
The wheel is divided into multiple independent rollers that can rotate at different velocities. This segmentation allows each roller to independently adapt to the local guide profile conditions, distributing wear more evenly across all rollers rather than concentrating it on one contact surface.
Solution Approach 2:
Each roller is given the quality of independent rotational control, allowing local adaptation to varying friction conditions. Rollers experiencing higher friction can rotate at different speeds or adjust their contact forces independently, preventing excessive wear on any single roller while maintaining overall carriage movement.
3Reliability
If guide profile has imperfections causing distance variations, then contact stress becomes uneven, but constant wheel distance cannot accommodate these variations
Solution Approach 1:
The rolling members incorporate dynamic adjustment mechanisms that allow the distance between contact surfaces to vary in response to guide profile imperfections. This dynamic capability enables the system to maintain stable carriage operation while accommodating local variations in the guide profile through automatic roller position adjustment.
Solution Approach 2:
The system changes the parameter of inter-contact distance from a fixed constant to a variable parameter that can adapt to guide profile conditions. This parameter change allows the rolling members to accommodate imperfections in the guide profile while maintaining overall carriage stability through coordinated roller adjustments.
4Reliability
If carriage transitions from straight to curved portion, then some wheels lose contact with guide profile, but this causes stresses and high friction wear
Solution Approach 1:
The rolling members are segmented into multiple independent rollers that can individually maintain contact with the guide profile during transitions. This segmentation ensures that when the carriage moves from straight to curved portions, at least some rollers remain in contact with the guide profile, distributing the transition stresses and preventing complete loss of contact.
Solution Approach 2:
The rolling members are designed with dynamic adjustment capabilities that allow them to adapt their positions and contact forces during carriage transitions. This dynamic behavior enables smooth transitions from straight to curved portions by continuously maintaining optimal contact between rollers and guide profile, preventing sudden stress spikes and friction wear.
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 configuration significantly reduces wear on rolling members, ensures stability and precise orientation of products, and minimizes the frequency of wheel replacement by maintaining consistent contact along the guide path.
Implementation Method 1
the wheels are subjected to stresses that might cause a different distribution of the friction forces which act on the first contact surface and on the second contact surface
Implementation Method 2
the mobile carriage comprises rolling members which must be predisposed in such a way as to be in contact with and roll on the two rolling walls of each of the two guide profiles
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The transport system (S) comprises a guide path (1) and at least a mobile carriage (2) movable along the guide path (1). The guide path (1) comprises a first guide profile (11) and a second guide profile (12). A single pair of rollers (31, 32) are mounted rotatably in an independent way to one another on a first rotation shaft (51) borne by the mobile carriage (2) so as to be in contact with the first guide profile (11). A first pair of rollers (41, 42) and a second pair of rollers (43, 44) are mounted rotatably in an independent way to one another on a second rotation shaft (52) and on a third rotation shaft (53) borne by the mobile carriage (2) so as to be in contact with the second guide profile (12).