Cam Phaser Retention Feature for Assembly Alignment
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Solution Overview
Problem
The assembly of cam phasers is complicated by the need for precise alignment of components, which can be difficult to maintain due to loose parts inadvertently rotating during assembly, leading to potential misalignment and assembly challenges.
Innovation Solution
A retention feature comprising tabs on the check valve plate and corresponding indentations on the stator or locking cover, which align and secure the components in the correct angular position, ensuring proper alignment of openings and features for assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If components are loosely positioned during assembly, then ease of assembly is improved, but alignment precision deteriorates due to inadvertent rotation of loose parts
Solution Approach 1:
The retention feature (tabs and indentations) is pre-configured on the components before assembly begins. These features automatically engage when components are positioned, preliminarily establishing and maintaining the correct alignment relationship throughout the assembly process, preventing inadvertent rotation even as other components are added.
2Manufacturing precision
If retention features are added to maintain alignment, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The retention feature is implemented locally at specific engagement points on the components (tabs on one component, corresponding indentations on another) rather than requiring a complex overall alignment mechanism. This localized approach provides precise alignment control with minimal additional structure, maintaining simplicity while ensuring accuracy.
Data Source
AI summary
A cam phaser has a stator, a rotor positioned in the stator and including a locking pin, a locking cover including a receiving feature for receiving the locking pin, a cover plate, and a check valve plate positioned between the stator and the locking cover and including a plurality of valve elements. The cam phaser also has a plurality of first openings in each of the stator, locking cover, and check valve plate, a plurality of second openings in the locking cover, and a third opening formed in the check valve plate. The cam phaser further includes a retention feature for aligning components of the cam phaser during assembly, the retention feature including one or more tabs on a first component and one or more indentations on a second component receiving the one or more tabs.