Conveyor Roller Tapered Sleeve Fixation Against Axial Displacement
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Solution Overview
Problem
Conveyor rollers with frustoconical sleeves face issues with axial displacement and damage due to high forces and speed, especially in the food-processing industry, where traditional friction fits are unreliable and can lead to contamination from lubricants leaking into conveyed goods.
Innovation Solution
A positioning installation with a radial protrusion on the roller body that extends into a clearance in the sleeve, providing a secure axial fixation without connecting the interior space to the environment, using a form-fitting or welded connection to prevent leakage and ensure stability under high forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a frustoconical sleeve is used on a cylindrical roller body for implementing curves in conveying sections, then the conveyor roller can guide the conveyor belt around curves, but the sleeve can be displaced axially under high forces and speeds, leading to incorrect loading and damage
Solution Approach 1:
The positioning installation divides the fixation function into separate components: a protrusion element on the roller body and a corresponding clearance in the sleeve, creating modular fixation points that prevent axial displacement while maintaining the sleeve's curve guidance function
Solution Approach 2:
The protrusion and clearance are pre-configured in specific positions before operation, establishing the correct axial position of the sleeve in advance. This preliminary positioning prevents displacement under operational forces and speeds
2Ease of manufacture
If traditional friction fit is used to secure the frustoconical sleeve, then the assembly is simple, but the connection is unreliable under high forces and can lead to lubricant leakage into conveyed goods
Solution Approach 1:
The harmful friction fit connection is replaced by extracting the essential function of axial fixation through the protrusion-clearence mechanism, eliminating the need for lubricants and their associated leakage risks while maintaining connection stability
Solution Approach 2:
The protrusion acts as an intermediary element between the roller body and sleeve, providing a positive mechanical connection that prevents axial displacement without requiring friction or lubrication, thereby eliminating contamination risks
3Reliability
If the frustoconical sleeve is tightly fitted to prevent displacement, then axial stability is improved, but the manufacturing precision requirements increase and assembly becomes more difficult
Solution Approach 1:
The tight fit requirement is segmented into discrete positioning features (protrusion and clearance) with defined tolerances, reducing the overall precision requirement compared to a continuous tight fit while maintaining axial stability
Solution Approach 2:
The fixation mechanism changes from relying on friction coefficient parameters to relying on geometric parameters of the protrusion and clearance, allowing for more relaxed tolerance specifications while achieving reliable axial positioning
Data Source
AI summary
A conveyor roller for conveying systems for conveying articles comprises a cylindrical roller body having a rotation axis, the cylindrical roller body being provided for the rotatable assembly in a frame or the like, wherein one or a plurality of substantially frustoconical sleeves is/are disposed on the cylindrical roller body. The cylindrical conveyor roller includes a positioning installation by which the frustoconical sleeve is axially fixed at least along the rotation axis in at least one direction, wherein the positioning installation comprises a protrusion which axially extends in a radially outward manner on the cylindrical roller body and which extends into a clearance that is configured in the frustoconical sleeve.