Profiled Wheel Retainer Assembly for Selective Shaft Locking
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Solution Overview
Problem
Existing multi-speed transmission systems lack an efficient mechanism to selectively lock and unlock a profiled wheel relative to a shaft, which is crucial for varying gear ratios and operational flexibility.
Innovation Solution
A profiled wheel assembly with a retainer that can move between a lock position to axially retain the profiled wheel on the shaft and a release position to unlock it, utilizing engagement features and guide slots to secure the retainer in place, allowing for easy installation and removal of the profiled wheel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a retainer mechanism is added to selectively lock the profiled wheel on the shaft, then the operational flexibility and gear ratio adjustment capability are improved, but the device complexity increases
Solution Approach 1:
The retainer is divided into a body portion and an arm portion that can move independently between locked and unlocked positions. The profiled wheel is segmented with engagement features (slots and protrusions) that interact with the retainer arm, allowing selective locking at specific positions. This segmentation enables operational flexibility without requiring a completely complex locking mechanism.
Solution Approach 2:
The retainer arm acts as an intermediary element between the profiled wheel and the shaft. It mediates the locking function by engaging with the engagement features on the profiled wheel and the shaft, providing a simple mechanical interface that achieves complex locking functionality without direct complex interaction between the wheel and shaft.
2Reliability
If engagement features and guide slots are added to secure the retainer, then the reliability of the locking mechanism is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The guide slots and engagement features are pre-formed during manufacturing of the profiled wheel and retainer components. The guide slots are preliminarily positioned to guide the retainer arm into correct alignment, and the engagement features (protrusions and slots) are pre-configured to automatically engage at the correct positions, ensuring reliable locking without requiring high-precision assembly operations.
Solution Approach 2:
The engagement features and guide slots are designed to automatically guide and secure the retainer in the correct position during assembly. The profiled wheel's engagement features self-align with the retainer arm through the guide slots, and the spring mechanism automatically positions the retainer, reducing the need for high-precision manual assembly and lowering manufacturing precision requirements.
3Ease of operation
If the retainer is designed to move between lock and release positions, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The retainer arm is designed as a dynamic component that can move between locked and unlocked positions rather than a fixed structure. A spring mechanism provides the dynamic force to automatically return the retainer arm to the locked position after engagement, enabling easy operation (simple axial movement to unlock) without complex control systems. The dynamics of the spring-loaded arm provide automatic resetting functionality.
Data Source
AI summary
A profiled wheel assembly for coupling to a shaft includes a profiled wheel having a first guide slot extending radially outwardly from a central aperture of the profiled wheel and a first assembly slot spaced apart from and parallel to the first guide slot. A retainer is supported on the profiled wheel for movement between a lock position wherein the retainer axially locks the profiled wheel relative to the shaft and a release position wherein the retainer axially unlocks the profiled wheel relative to the shaft.