Valve Key Tool Core Covering Annular Grooves
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Solution Overview
Problem
Existing tools for fitting valve keys in internal combustion engines are prone to errors due to manufacturing tolerances and require complex adjustments, leading to unreliable latching engagement and increased susceptibility to faults.
Innovation Solution
A tool with an elongate recess in the core to receive the valve stem, allowing the core to cover annular grooves and ensure correct latching engagement, combined with symmetrical transport passages and guide jaws for precise key placement, minimizing the need for additional actuators and reducing error susceptibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the tool uses accurate positioning relative to the valve stem to introduce valve keys directly into annular grooves, then the latching engagement precision is improved, but the susceptibility to errors increases due to manufacturing tolerances
Solution Approach 1:
The core is designed to preliminarily cover the annular grooves before the valve keys are introduced. This preliminary action ensures that the grooves are already in position when the keys are fed, eliminating the need for precise real-time positioning and reducing error susceptibility while maintaining latching engagement precision
Solution Approach 2:
The core acts as an intermediary element between the transport passages and the annular grooves. By covering the grooves and serving as a reference surface, the core mediates the positioning process, allowing keys to be reliably introduced without direct dependence on tight tolerances between the tool and valve stem
2Reliability
If the tool includes additional actuators and complex mechanisms for radial supply of keys, then the key feeding reliability is improved, but the device complexity increases
Solution Approach 1:
The invention extracts and eliminates the need for additional actuators and complex radial supply mechanisms. By using the core to cover the annular grooves and provide a stable reference surface, the system achieves reliable key feeding through gravity and simple guidance structures alone, removing unnecessary complexity
Solution Approach 2:
The core structure itself provides the positioning and guidance functions that would otherwise require additional actuators. The inwardly curved end region of the core automatically covers the annular grooves and guides the keys into place, making the system self-sufficient without extra moving parts
Data Source
AI summary
A tool for attaching valve keys to a valve stem includes an elongated holder with a longitudinal axis, an inner hollow space and an end opening. An elongated core is arranged in the hollow space of the holder coaxially to the longitudinal axis. An elongated recess for receiving a substantial upper portion of the valve stem is provided in the end region of the core coaxially to the longitudinal axis. The recess of the core issues into the end opening and has a depth which is greater than or at least equal to the axial distance between the end and the annular groove of the valve stem. The core at least partially covers the annular groove, such that the valve keys can be supplied to the lateral surface of a valve stem underneath the annular groove and incorrect engagement can be avoided.