Roller Bearing Preload Assembly for Consistent Torque Locking
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Solution Overview
Problem
Existing preload assemblies for roller bearings lack a standardized and efficient method to achieve the correct preload torque, leading to inconsistent bearing performance and potential mechanical failures.
Innovation Solution
A preload assembly comprising a threaded bolt with a compression head and hex head, an anti-rotational washer, a serrated edge locking washer, and a locking nut, which are designed to provide a specific thread length and torque to ensure precise preload on roller bearings, with the assembly being covered by a hub for additional protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing preload assemblies are used for roller bearings, then installation is simple, but the preload torque is inconsistent leading to bearing performance variability
Solution Approach 1:
The preload assembly is divided into distinct functional components: a threaded bolt with compression head, anti-rotational washer, serrated edge locking washer, and locking nut. Each component performs a specific function (preload application, rotation prevention, locking, and torque regulation), allowing for standardized manufacturing of individual parts while achieving consistent overall preload torque through their coordinated interaction.
Solution Approach 2:
The invention specifies precise geometric parameters for each component, including thread pitch, compression head dimensions, washer hole diameters, and locking nut features. These controlled parameters ensure that when components are assembled, they produce a predetermined preload torque on the roller bearings, eliminating the variability present in existing assemblies.
2Reliability
If a standardized preload assembly with specific thread length and torque regulation is implemented, then bearing performance consistency improves, but the number of components and assembly steps increases
Solution Approach 1:
The threaded bolt is pre-assembled with the anti-rotational washer and serrated edge locking washer before installation onto the bearing assembly. This preliminary preparation ensures that the components are correctly positioned and configured to deliver the predetermined preload torque from the first tightening operation, eliminating the need for multiple adjustment steps and ensuring reliable bearing performance.
Solution Approach 2:
The serrated edge locking washer acts as an intermediary component between the locking nut and the other assembly parts. It provides a controlled interface for torque application and distribution, ensuring that the preload force is evenly transmitted to the roller bearings while the locking nut secures the entire assembly. This intermediary mechanism enhances reliability by preventing torque loss and component loosening.
Data Source
AI summary
A preload assembly for bearings comprising in combinations a threaded bolt, an anti-rotational washer, a serrated edge locking washer, and a threaded locking nut having a shallow outer profile and at least four locking notches in an outer edge thereof.