Split Retaining Ring Assembly for Shaft-Sleeve Alignment
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Solution Overview
Problem
Conventional retainer assemblies fail to securely fix a sleeve to a shaft for rotational and axial alignment while allowing for easy installation and proper alignment of lubrication holes.
Innovation Solution
A retaining ring with two identical halves, each featuring curved sections and flats, is used to securely attach a shaft to a sleeve, utilizing detents and a spring clip for axial retention, allowing for rotational and axial fixation without complex features like splines or interference fits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional retainer assemblies are used to fix a sleeve to a shaft, then rotational and axial alignment is achieved, but the assembly process is complex and requires precise alignment of lubrication holes
Solution Approach 1:
The retaining ring is divided into two separate half-rings that can be independently installed onto the shaft. This segmentation allows each half-ring to be positioned and secured separately, simplifying the overall assembly process and eliminating the need for complex alignment procedures for a single large retaining ring.
Solution Approach 2:
The shaft is pre-equipped with retaining ring slots that guide the half-rings into their final positions. These slots are positioned to automatically align the half-rings with the shaft and sleeve features, eliminating the need for manual alignment of lubrication holes and other critical features during assembly.
2Reliability
If conventional retainer assemblies are used to prevent axial movement, then axial retention is achieved, but the design requires additional complex features like splines or interference fits
Solution Approach 1:
The half-rings utilize the shaft's own geometry (the retaining ring slots and outer radius) to achieve axial retention. The spring clip engages with the slot structure to provide axial locking without requiring additional splines, interference fits, or other complex retention features on the shaft itself.
Solution Approach 2:
The spring clip acts as an intermediary element that provides axial retention by engaging with the retaining ring slot structure. This intermediary component enables reliable axial retention without requiring direct complex features between the shaft and sleeve, simplifying the overall design.
3Manufacturing precision
If a single retaining ring is used to secure shaft and sleeve, then rotational fixation is achieved, but installation requires precise alignment and is time-consuming
Solution Approach 1:
Dividing the retaining ring into two halves allows each half to be installed independently without requiring precise alignment of the entire ring. The half-rings can be positioned in the retaining ring slots and secured separately, dramatically reducing installation time and eliminating the need for complex alignment procedures for lubrication holes and other features.
Solution Approach 2:
The retaining ring slots on the shaft are pre-positioned to automatically align the half-rings with all necessary features including lubrication holes. This preliminary positioning structure ensures that when the half-rings are installed, all alignment requirements are automatically satisfied without requiring manual measurement or adjustment during assembly.
Data Source
AI summary
A retaining ring configured to retain a shaft to a sleeve to fix the shaft rotationally and axially to the sleeve can include a first portion configured to install around the shaft and within the sleeve. The first portion can include one or more first curved sections and at least one first portion flat. The retaining ring can include a second portion configured to install around the shaft and moveable relative to the first portion, the second portion comprising one or more second curved sections and at least one second portion flat. The first portion flat can be defined between a plurality of the first curved sections, and wherein the second portion flat can be defined between a plurality of the second curved sections, for example.