U-Shaped Securing Device for Actuating Lever Assembly
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Solution Overview
Problem
Existing securing devices for actuating levers in valve control mechanisms of internal combustion engines fail to accommodate additional features such as anti-pop-off features, requiring alternative configurations to prevent dislocation and ensure proper assembly.
Innovation Solution
A U-shaped securing device that mounts onto the roller pocket and seats around the actuating lever's socket dome, with bifurcated arms extending into a recessed groove of the support member, providing a secure connection while accommodating additional features through a gap and plastically deformed retention features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional U-shaped retention clips are used to secure actuating levers, then assembly unitization is improved, but compatibility with additional features (anti-pop-off features) deteriorates
Solution Approach 1:
The securing device is divided into multiple functional segments: a U-shaped body portion for general retention, and separate arm portions that can be positioned to accommodate anti-pop-off features. This segmentation allows each part to perform its specific function while working together as a unified securing mechanism.
Solution Approach 2:
The securing device is designed to nest around existing features on the actuating lever and support member, including anti-pop-off features. The arms of the securing device can be positioned within or around these features, allowing the securing device to integrate with rather than conflict with additional features.
2Reliability
If securing devices are designed to prevent dislocation, then reliability is improved, but device complexity increases due to alternative configurations
Solution Approach 1:
The securing device is designed as a multi-functional component that provides both retention (preventing lateral displacement) and anti-pop-off protection (preventing axial disassembly) in a single integrated structure. This eliminates the need for separate securing devices for each function, reducing overall system complexity despite the enhanced capabilities.
Data Source
AI summary
A device for securing a support element to an actuating lever of a valvetrain of an internal combustion. The actuating lever having a socket dome to accept a socket end of the support element and a roller pocket, with the securing device seated on the socket dome, extending through the roller pocket and splitting into two arms that extend on opposite ends of a circumferential groove below the socket end of the support element.