Eccentric Lock Retainer for Ground Engaging Tools
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Solution Overview
Problem
Existing retainer systems for ground engaging tools on earth-working machines face issues with secure attachment and detachment, as well as increased friction due to work material accumulation, which affects the longevity and efficiency of the tools.
Innovation Solution
A retainer system featuring a lock with a varying radius outer surface and a retainer bushing with detent projections and recesses, allowing for secure locking and easy detachment of ground engaging tools, while reducing friction through eccentric configurations and self-lubricating materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional pin-retainer system is used to attach ground engaging tools, then the attachment is secure, but the detachment process is time-consuming and requires specialized tools
Solution Approach 1:
The lock transitions from a static pinned state to a dynamic rotating mechanism that can quickly switch between locked and unlocked positions, enabling fast attachment and detachment without specialized tools
Solution Approach 2:
The traditional threaded pin-retainer mechanical system is replaced with a rotating lock mechanism that uses rotational motion and eccentric geometry to achieve secure attachment and quick release
2Reliability
If a tight-fitting retainer system is used to secure ground engaging tools, then the attachment is secure, but friction increases due to work material accumulation
Solution Approach 1:
The lock employs an eccentric outer surface with varying radius that creates asymmetric engagement with the retainer bushing, providing secure attachment in the locked position while allowing clearance for work material in the unlocked position
Solution Approach 2:
The retainer system separates the locking function from the attachment function, allowing the lock to provide secure engagement when needed while permitting work material clearance during operation
Data Source
AI summary
Disclosed are various exemplary embodiments of a retainer system for a ground engaging tool. The retainer system may include a lock having a lock rotation axis and including an outer surface extending about the lock rotation axis and a retainer bushing having a retainer axis and an inner surface extending about the retainer axis. The inner surface may be configured to rotatably receive the outer surface of the lock. At least a portion of the outer surface may have a varying radius with respect to the lock rotation axis.