Wear Assembly Locking Mechanism for High-Force Bucket Lip Attachment
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Solution Overview
Problem
Existing adapter systems for excavator bucket lips are proprietary and require customization for specific makes, limiting their broad applicability across different lip configurations, and face significant operational forces that traditional locking mechanisms struggle to withstand.
Innovation Solution
A wear assembly with a locking system featuring a wear member and a lock assembly, including a locking member and actuator, that aligns with the bucket lip aperture to pivot and bear against its surface, providing a secure attachment through a pivot and bearing mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional locking pins with wedging action are used, then the adapter can be tightened onto the bucket lip, but the locking mechanism cannot withstand significant operational forces
Solution Approach 1:
The locking pin is divided into two functional segments: a cylindrical body portion that provides structural strength and resists operational forces, and a separate wedge portion that provides the tightening action during installation. This segmentation allows each part to be optimized for its specific function without compromise.
Solution Approach 2:
The wedge portion is designed to perform the tightening action during the installation phase before the adapter is subjected to operational forces. Once installed, the cylindrical body portion maintains the connection without requiring continuous wedging action, separating the tightening function from the load-bearing function.
2Reliability
If proprietary locking systems are designed for specific lip configurations, then the adapter can be securely attached, but the system lacks broad applicability across different lip makes
Solution Approach 1:
The locking pin design with its cylindrical body portion and separate wedge portion creates a universal interface that can accommodate different lip configurations. The cylindrical body can engage with various aperture types and sizes, while the wedge portion can be adjusted or selected to match specific tightening requirements, making the system broadly applicable across different excavator lip makes and models.
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 system securely attaches adapters to various bucket lip configurations, withstands operational forces, and allows for easy installation and removal, enhancing versatility and durability.
Implementation Method 1
the second pivot surface being arranged to engage with the first pivot surface to allow pivoting of the locking member about the first pivot surface
Implementation Method 2
the actuator being operable to cause said pivoting, and to selectively cause the bearing surface of the locking member to bear against the bearing surface of the aperture
Data Source
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AI summary
A wear assembly such as an adapter for a cable shovel having a Whisler-style lip has two legs extending over the lip, and a hole in the legs arranged to align with a hole in the lip. A locking member is inserted in the hole, and hooked around a pivot surface in the lower leg. An actuator is inserted into the hole in the upper leg, and engages with t top end of the locking member. Movement of the actuator causes pivoting of the locking member, and results in the locking member bearing against the lip hole in order to lock the wear assembly in position.