Conveyor Roller Two-Part Hub Design for Dust Sealing
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Solution Overview
Problem
Existing support rollers for conveyor drive belts are heavy due to thick hubs, which complicates manufacturing and handling, and lack a dust-tight seal, affecting dimensional accuracy and installation of bearings.
Innovation Solution
A two-part hub design with a thin-walled outer hub and a heavy inner hub allows for separate manufacturing and assembly, incorporating a cylindrical die to absorb shrinkage forces and enhance dust-tightness by integrating a sealing lip on the outer hub.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a one-part hub design is used, then manufacturing is simpler, but the hub becomes heavy and dimensional accuracy is impaired by shrinkage forces
Solution Approach 1:
The hub is divided into two separate parts: an inner hub and an outer hub. The inner hub contains the bearing seats and is manufactured separately, while the outer hub is a thin-walled structure that receives the polymer layer. This segmentation allows each part to be optimized independently, reducing overall weight while maintaining structural integrity and dimensional accuracy.
2Device complexity
If a one-part hub design is used, then structure is simpler, but shrinkage forces during polymer layer application impair geometry and bearing installation
Solution Approach 1:
By separating the hub into inner and outer parts, the inner hub can be manufactured with high precision bearing seats before the polymer layer is applied. The outer hub absorbs the shrinkage forces during polymer layer application, protecting the inner hub's geometry from distortion.
Solution Approach 2:
The outer hub acts as an intermediary structure that protects the inner hub from shrinkage forces. During polymer layer application, the outer hub receives and dissipates the shrinkage forces, preventing them from affecting the dimensional accuracy of the inner hub's bearing seats.
3Strength
If a heavy one-part hub is used, then structural strength is sufficient, but handling and logistics become difficult
Solution Approach 1:
Dividing the hub into two parts reduces the weight of each individual component that needs to be handled during manufacturing and installation. The thin-walled outer hub and the inner hub can be manufactured and prepared separately, improving ergonomics during assembly operations.
4Ease of manufacture
If traditional hub design is used, then manufacturing is straightforward, but dust-tightness is insufficient affecting bearing installation
Solution Approach 1:
The two-part hub design enables the creation of a dust-tight seal between the inner hub and outer hub. The interface between these two parts can incorporate sealing elements that prevent dust and contaminants from entering the bearing installation area, improving reliability while maintaining manufacturing feasibility.
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 simplifies manufacturing, reduces energy consumption, maintains dimensional accuracy, and improves ergonomics and logistical efficiency while ensuring a dust-tight seal, even for robust metal hubs.
Implementation Method 1
the polymer layer situated on the outer side of the jacket of the outer hub (1) is drawn radially inwardly in a continuation on the outer side of the end wall (3), and ends in a circular sealing lip (7)
Data Source
AI summary
A support roller or drive roller for a drive belt of a conveyor, having a hub which is supported by use of ball bearings and which is provided with an elastic polymer layer on its outer periphery as a running surface for the drive belt. The roller is easily manufactured as the hub is made up of a hollow cylindrical outer hub which bears the polymer layer, and a hollow cylindrical inner hub which accommodates the ball bearings. Further, the inner hub is pushed into the outer hub and joined to the outer hub in a rotationally fixed manner.