Retainer Sleeve External Ribs for Secure Tip Locking
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Solution Overview
Problem
Current retainer sleeves used in work implement assemblies, such as bucket assemblies, may not provide sufficient robustness in extreme operating conditions, necessitating a more durable solution for securely attaching and detaching tips from adapters.
Innovation Solution
A retainer sleeve with a partially annular configuration featuring a radially inner aperture, anti-rotation features, and external ribs, which provides a robust locked configuration and a less robust unlocked configuration, allowing for easy tip replacement and secure attachment, is designed. The sleeve is made from resilient materials like polyurethane, enabling deformation and rebound during locking and unlocking processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a robust retainer sleeve design is used to enhance durability in extreme operating conditions, then the strength and reliability are improved, but the ease of operation for locking and unlocking may be worsened
Solution Approach 1:
The retainer sleeve utilizes elastic material properties and dimensional changes during operation. When the retainer is inserted, the sleeve elastically deforms to accommodate it, then rebounds to create a secure locked position. The anti-rotation feature includes a sloping ledge that changes position relative to the retainer's sloped face during rotation, enabling easy unlocking through rotational motion while maintaining secure locking when engaged.
Solution Approach 2:
The retainer sleeve is designed as a dynamic component that transitions between locked and unlocked states. The sleeve can elastically deform during the locking process and then maintain a stable locked configuration. The anti-rotation feature with its sloping ledge provides a dynamic unlocking mechanism where rotational motion transforms the engagement state from locked to unlocked, allowing easy operation while maintaining reliability.
2Stability of the object's composition
If a retainer sleeve with anti-rotation features is used to prevent rotation, then the stability is improved, but the device complexity increases
Solution Approach 1:
The retainer sleeve incorporates localized anti-rotation features rather than complex overall structural designs. The anti-rotation feature includes a sloping ledge positioned at a specific location on the sleeve's inner surface, which works in conjunction with the corresponding sloped face on the retainer. This localized approach provides effective anti-rotation functionality while keeping the overall sleeve structure simple and manageable.
Solution Approach 2:
The anti-rotation feature utilizes asymmetric geometry with a sloping ledge that forms an oblique angle with the axis of rotation. This asymmetric design creates a mechanical interference that prevents rotation in one direction while allowing controlled rotation for unlocking. The asymmetric shape of the sloping ledge and its engagement with the retainer's sloped face provides effective anti-rotation stability without requiring complex symmetric structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the retention mechanism's robustness and ease of use by providing a secure locked state and facilitating easy transition between locked and unlocked configurations, suitable for various operating conditions and applications.
Implementation Method 1
The sleeve is made from resilient materials like polyurethane, enabling deformation and rebound during locking and unlocking processes
Data Source
AI summary
A retainer sleeve includes an at least partially annular body defining an axis of rotation, a radial direction, and a circumferential direction. The body may also have a radially inner annular surface defining a radially inner aperture, and a first anti-rotation feature extending radially inwardly from the radially inner annular surface including a sloping ledge having a locking surface, and an outer peripheral surface defining a notch that is at least partially aligned with the first anti-rotation feature or an array of a plurality of external ribs extending outwardly radially from the outer peripheral surface.