Splined Lubricant Dam Insert Positioning for Precise Axial Alignment
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Solution Overview
Problem
Axial positioning of circular lubricant dam inserts on splined drive shafts is challenging, leading to potential improper lubrication and damage due to existing methods' inability to ensure precise alignment.
Innovation Solution
A positioning tool with a circular body, splines, a depth setting member, and a position setting element is used to securely position the lubricant dam insert on the drive shaft, ensuring accurate axial alignment without interfering with circumferential positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional positioning methods are used for the lubricant dam insert, then the device complexity is reduced, but the manufacturing precision and reliability deteriorate due to improper axial positioning
Solution Approach 1:
A positioning tool is introduced as an intermediary device between the drive shaft and the lubricant dam insert. The positioning tool includes a circular body with splines that mate with splines on the drive shaft, and positioning elements that contact the insert to establish precise axial positioning. This intermediary tool enables accurate positioning without requiring complex integrated systems.
Solution Approach 2:
The positioning tool is designed to be installed on the drive shaft before the lubricant dam insert. The tool establishes the correct axial position in advance, allowing the insert to be positioned accurately during assembly. The positioning elements extend axially to contact the insert and define its position before permanent installation.
2Manufacturing precision
If the positioning tool includes splines on the circular body, then the manufacturing precision of axial positioning is improved, but the device complexity increases due to additional components
Solution Approach 1:
The positioning tool combines multiple functions into a single integrated circular body: circumferential positioning is achieved through splines on the inner surface that mate with drive shaft splines, while axial positioning is achieved through positioning elements extending from the circular body. This merging of functions reduces the need for separate positioning components.
Solution Approach 2:
The circular body serves multiple purposes: it provides a sliding surface over the drive shaft, engages circumferentially through splines, defines axial position through positioning elements, and guides the lubricant dam insert into correct position. This multi-functionality reduces overall device complexity while maintaining precision.
3Reliability
If axial positioning is not precisely controlled, then the ease of manufacture is improved, but the reliability deteriorates due to poor lubrication and potential breaking of the insert
Solution Approach 1:
The positioning tool is designed to self-align and self-position during assembly. The splined engagement automatically establishes circumferential alignment, while the positioning elements automatically establish axial position. This self-service mechanism ensures reliable positioning without requiring complex adjustment procedures or specialized manufacturing skills.
Data Source
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AI summary
A positioning tool (100) for axially positioning a circular lubricant dam insert (120) on a splined drive shaft (110) may include a circular body (140) having an inner surface (142) configured to slide over an outer surface (128, 150) of the splined drive shaft (110). A first plurality of splines (126, 146, 148) may be positioned on an inner surface (142) of the circular body (140), the first plurality of splines (126, 146, 148) mating with a second plurality of splines (126, 146, 148) on the outer surface (128, 150) of the splined drive shaft (110). A depth setting member (160) may be positioned on the circular body (140) that defines an axial extent to which the circular body (140) slides over the outer surface (128, 150) of the splined drive shaft (110). A position setting element (170) may extend axially from the circular body (140) to contact an axial end (164, 172) of the insert to axially position the insert on the splined drive shaft (110).