Lock Pin Anti-Rotation Spring Retaining Mechanism
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Solution Overview
Problem
Existing retaining mechanisms for work implement assemblies, such as bucket assemblies, lack resistance to unintentional rotation of locking pins, leading to undesired unlocking and potential loss of tips or teeth.
Innovation Solution
A retaining mechanism featuring a spring and lock pin assembly, where the lock pin engages with a spring that prevents unintentional rotation, ensuring the pin is trapped in the aperture and preventing its removal, thereby securely attaching the tip to the adapter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple pin securing mechanism is used, then the device complexity is reduced, but the reliability of tip attachment deteriorates due to unintentional rotation and undesired unlocking
Solution Approach 1:
The spring is pre-compressed and positioned within the retaining mechanism before the pin is inserted. This preliminary action ensures that when the pin is installed, the spring immediately engages with the pin's circumferential surface, creating automatic resistance to rotation without requiring additional locking features or complex adjustment mechanisms.
Solution Approach 2:
The spring acts as an intermediary element between the pin and the retaining block. It transfers and amplifies the resistance to rotation by engaging the pin's circumferential surface, thereby preventing unintentional rotation and undesired unlocking while maintaining a relatively simple overall structure.
2Ease of operation
If a pin without anti-rotation feature is used, then the ease of operation is improved, but the reliability deteriorates due to risk of unintentional unlocking
Solution Approach 1:
The spring is pre-positioned to engage the pin's circumferential surface, creating automatic resistance to rotation before any unintentional unlocking can occur. This preliminary anti-action prevents the harmful effect of rotation without adding complex locking mechanisms that would complicate operation.
Solution Approach 2:
The spring automatically engages with the pin's circumferential surface upon pin insertion, providing self-service anti-rotation protection without requiring additional operators or complex mechanisms. The spring's elastic nature allows it to automatically adjust and maintain contact, ensuring reliable prevention of unintentional unlocking while keeping the operation simple.
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 effectively prevents unintentional rotation and removal of the lock pin, enhancing the stability and security of the tip attachment, reducing the risk of loss and improving operational reliability.
Implementation Method 1
a spring (600) attached to the retaining block (400)... The lock pin (500) engages the spring (600), thereby providing resistance to rotation of the lock pin
Data Source
AI summary
A lock assembly for attaching a wear member to a base includes a retaining block with a spring attached to the retaining block that fits into an aperture of the base. A lock pin fits into the aperture of the wear member, and the aperture of the retaining block, retaining the wear member onto the base. The lock pin engages the spring that prevents unintentional rotation of the lock pin so that the lock pin is trapped in the aperture of the wear member, preventing its unintentional removal.