Offset Retaining Ring Lock Nut Torque Maintenance
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Solution Overview
Problem
Existing lock nut systems require additional rotation to adjust the position of the nut teeth, which changes the torque applied to the shaft, making it difficult to maintain the desired torque setting without altering the nut's position.
Innovation Solution
A lock nut system utilizing retaining rings with offset locking teeth, allowing the nut to be locked into position without further rotation, using either a clockwise or counterclockwise offset keeper to align with the nut teeth without changing the torque applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the nut is rotated to adjust the position of the nut teeth to mesh with the retaining member teeth, then the locking engagement is improved, but the torque applied by the nut onto the bearing changes
Solution Approach 1:
The nut is pre-positioned on the shaft to the desired torque setting before the retaining member is installed. The offset keeper design allows the teeth to mesh without requiring additional rotation of the nut, thus maintaining the pre-applied torque on the bearing while achieving proper locking engagement.
Solution Approach 2:
The keeper is designed with an offset position relative to the centerline of the nut, creating an asymmetric configuration. This offset allows the keeper teeth to align with and mesh with the nut teeth at the nut's original position, eliminating the need for rotation and preserving the applied torque.
2Ease of operation
If the nut position is adjusted to align teeth for locking, then the locking function is achieved, but the specified torque setting is altered
Solution Approach 1:
The nut is pre-positioned to the specified torque setting during installation. The offset keeper is then engaged to lock the nut in this pre-determined position, ensuring that the torque setting is maintained without requiring post-tightening adjustments.
Solution Approach 2:
The offset keeper acts as an intermediary component that bridges the nut and the shaft. Its offset design allows it to engage the nut teeth at the nut's original position, serving as a mediator that enables locking without disturbing the torque setting.
3Reliability
If additional rotation is applied to the nut for tooth alignment, then the retaining member engagement is improved, but the time and complexity of the locking process increases
Solution Approach 1:
The nut is pre-positioned to the correct angular orientation on the shaft before the retaining member is installed. The offset keeper is designed to match this pre-positioned orientation, allowing immediate engagement without requiring additional rotation or time-consuming adjustments.
Solution Approach 2:
The asymmetric offset design of the keeper allows it to engage with the nut teeth at a specific angular position. This design eliminates the need for trial-and-error rotation, reducing the time required to achieve proper engagement while ensuring reliable locking.
Data Source
AI summary
A lock nut system includes a nut having a retaining member which includes a keeper having locking teeth configured to engage with the lock nut teeth. The locking teeth are offset in either a clockwise or counterclockwise direction to allow the lock nut to be locked into position on the shaft without further rotation or other adjustment of the nut.