Roller Bearing Preload Assembly With Anti-Rotation Torque Control
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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, where the threaded bolt and nut are designed to provide a specific torque range by threading onto the bolt stud, ensuring precise preload on roller bearings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a standardized threaded bolt with specific dimensions is used, then manufacturing precision and consistency are improved, but device complexity increases due to multiple components
Solution Approach 1:
The preload assembly is divided into multiple functional components: a threaded bolt with compression head for applying preload, an anti-rotational washer for preventing rotation, a serrated edge locking washer for securing the assembly, and a locking nut for maintaining torque. Each component performs a specific function that contributes to the overall precision and reliability of the preload application.
2Reliability
If multiple locking mechanisms are added to prevent rotation and secure the assembly, then reliability is improved, but ease of operation deteriorates due to more steps in assembly and adjustment
Solution Approach 1:
The anti-rotational washer is pre-configured with features that prevent rotation before the locking mechanisms are fully engaged. The serrated edge locking washer is designed to automatically engage with the compression head slots, providing preliminary securing action that reduces the complexity of subsequent locking operations.
3Reliability
If the compression head has slots for locking tabs, then reliability is improved by preventing rotation, but device complexity increases due to additional structural features
Solution Approach 1:
The compression head incorporates slots at specific locations where locking tabs need to engage, rather than providing continuous circumferential features. This localized approach provides the necessary anti-rotation security only where needed, reducing the overall structural complexity of the compression head while maintaining reliability.
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.