Composite Roller Flange Structure for Stable Conveyor Roller Mounting
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Solution Overview
Problem
Conventional conveyor rollers experience loosening and relative rotation between roller bases and shells due to different thermal expansion of materials, especially under heavy loads, leading to instability and increased inertia.
Innovation Solution
A roller flange design comprising a plastic body with a metallic ring and bearing, featuring force-transmitting elements like locking means and pins, securely anchors the roller bases against axial displacement and relative rotation, using a single overmolding process to integrate the metallic ring into the plastic body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If roller bases are made of plastic and mounted in metal roller shells, then the connection quickly loosens due to different thermal expansion of materials, but using metallic roller bases increases the inertia of the roller
Solution Approach 1:
The roller flange is constructed as a composite component with a plastic body and an integrally formed metallic ring. This composite structure combines the low weight and damping properties of plastic with the high strength and thermal stability of metal, achieving both reduced inertia and reliable connection under thermal and mechanical loads.
Solution Approach 2:
The metallic ring is positioned specifically at the force transmission zones where axial and radial loads occur, while the plastic body remains in non-critical areas. This localized metal reinforcement provides connection stability only where needed, minimizing overall weight increase while ensuring reliability at critical interfaces.
2Strength
If conventional roller connections are used, then the roller bases loosen under heavy loads, but securing a permanent tight fit is difficult to achieve
Solution Approach 1:
The metallic ring and plastic body are combined into a single integrated component through overmolding, eliminating the need for separate assembly steps for these parts. The force transmission elements are also integrally formed with the metallic ring, further reducing assembly complexity while maintaining strong mechanical connections.
Solution Approach 2:
The force transmission elements are pre-formed as integral parts of the metallic ring structure before assembly with the roller base. This preliminary formation ensures proper geometry and positioning for load transmission, simplifying the final assembly process while guaranteeing connection strength from the outset.
3Manufacturing precision
If roller bases are securely anchored against axial displacement and rotation, then dimensional tolerances can be maintained, but the connection must withstand thermal expansion differences
Solution Approach 1:
The use of plastic as the primary material for the roller flange body changes the thermal parameters of the component, giving it a lower coefficient of thermal expansion that better matches the plastic roller base. This parameter change reduces thermal stress and maintains dimensional tolerances across temperature variations.
Solution Approach 2:
The composite structure with plastic body and metallic ring provides differential thermal expansion management, where the plastic portions accommodate thermal changes with the roller base while the metallic ring maintains structural integrity and force transmission capability.
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
The design provides a stable, durable connection that withstands high loads and temperature fluctuations, maintaining dimensional tolerances while minimizing mass and inertia increase.
Implementation Method 1
the connection between the two quickly loosens due to different thermal expansion of the different materials
Implementation Method 2
The force transmission elements comprise one or more locking means for transmitting an axial force between the roller and the roller flange
Implementation Method 3
one or more pins for transmitting a radial force between the first roller and the roller flange or vice versa, such as a torque
Implementation Method 4
a bearing, and a metallic ring surrounding the bearing
Data Source
Figure 1
Figure 2a~2c
Figure 3
AI summary
A roller flange (100) for mounting on an end face of a cylindrical or roll-shaped roller (200) comprises a substantially annular plastic body (110), a bearing (120), and a metallic ring (130) surrounding the bearing (120). The ring (130) and the bearing (120) are at least partially embedded in the plastic body (110). The ring (130) has force-transmitting elements positioned distributed on or across a surface of the plastic body (110). The force-transmitting elements comprise at least one locking means (150a, 150b) for transmitting an axial force between the roller (200) and the roller flange (100), and at least one pin (160a, 160b, 160c, 160d) for transmitting a radial force between the roller (200) and the roller flange (100).