Retainer Sleeve External Ribs for Robust Tooth 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 retaining tips or teeth on adapters.
Innovation Solution
A retainer sleeve with a radially inner annular surface and a first anti-rotation feature, including a sloping ledge and locking surface, along with external ribs, is designed to securely hold the retainer in a locked or unlocked configuration, utilizing a resilient material like polyurethane for enhanced durability and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional retainer sleeve is used, then the assembly is simple and easy to manufacture, but the robustness and durability in extreme operating conditions are insufficient
Solution Approach 1:
The retainer sleeve incorporates external ribs that extend outwardly from its outer peripheral surface, creating localized regions of enhanced structural strength and rigidity. These ribs are strategically positioned to reinforce specific areas of the sleeve without requiring a complete redesign of the entire structure, thus improving robustness while maintaining relative simplicity of the overall design
Solution Approach 2:
The retainer sleeve is constructed from resilient material that combines flexibility with strength, creating a composite-like structure that adapts to extreme operating conditions. The material properties are engineered to provide both durability and the necessary elastic deformation characteristics for proper functioning in harsh environments
2Strength
If a more robust retainer sleeve is designed with additional features, then durability in extreme conditions is improved, but manufacturing complexity increases
Solution Approach 1:
The retainer sleeve design incorporates distinct segmented features including external ribs that are integrated into the sleeve body. These segments provide localized strength enhancement and can be manufactured as part of a single molded piece, avoiding the need for separate assembly steps and reducing manufacturing complexity despite the increased durability requirements
3Ease of manufacture
If the retainer sleeve structure is simplified, then ease of manufacture is improved, but the ability to provide reliable attachment in harsh conditions deteriorates
Solution Approach 1:
Rather than simplifying the entire sleeve structure, the design applies local quality enhancement through external ribs that provide targeted reinforcement at critical locations. This allows the majority of the sleeve to remain simple and easy to manufacture, while specific areas gain the necessary strength and rigidity for reliable attachment in harsh conditions
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 provides a robust locked configuration while allowing for easy unlocking, ensuring reliable attachment and detachment of tips or teeth, even in harsh conditions, and can be adapted for various applications by adjusting the design features.
Implementation Method 1
The retainer sleeve may be formed from a resilient material, such as polyurethane, that is sufficiently resilient to allow the retainer sleeve to be inserted over the retainer and for the anti-rotation feature to engage the retainer
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.