Motor Grader Circle Assembly With Double-Shear Pin Joint
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Solution Overview
Problem
Conventional single shear pin joints in motor grader implements exhibit limited durability and load-bearing capacity, leading to component failure and increased servicing costs.
Innovation Solution
A double shear pin joint design is implemented in the circle assembly, comprising a first bracket with spaced arms and a second bracket removably coupled via a fastener, enhancing durability and load-bearing capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single shear pin joint is used to couple the implement bracket to the side arm, then the device complexity is reduced and ease of manufacture is improved, but the reliability and load-bearing capacity deteriorate
Solution Approach 1:
The mounting assembly is segmented into multiple components: a first bracket fixed to the side arm, a second bracket fixed to the implement, and a fastener (pin) that couples them together. This segmentation allows for easier manufacture and assembly while distributing the load more effectively through the multi-component structure, resolving the contradiction between ease of manufacture and reliability.
2Device complexity
If a single shear pin joint is used, then the device complexity is reduced, but the load-bearing capacity deteriorates
Solution Approach 1:
The fastener is positioned such that it engages with both the first bracket and the second bracket in a configuration that creates a multi-dimensional load distribution system. The fastener extends through both brackets, creating a three-dimensional load-bearing structure that increases strength without significantly increasing device complexity.
3Ease of operation
If a single shear pin joint is used, then the ease of operation is improved, but the durability deteriorates
Solution Approach 1:
The mounting assembly design incorporates the fastener positioned between the first and second brackets, creating a pre-engineered load distribution system that cushions against excessive shear forces. This beforehand cushioning through proper structural design extends the durability of the joint while maintaining ease of operation through the standardized fastening mechanism.
Data Source
AI summary
A circle assembly for an implement of a motor grader includes a circle and one or more mounting assemblies adapted to couple the circle with the implement. Each of the one or more mounting assemblies includes a first bracket coupled to the circle. The first bracket includes a first arm, a second arm axially spaced apart from the first arm, and a third arm connecting the first arm with the second arm. Each of the one or more mounting assemblies also includes a second bracket removably coupled to the first bracket. The second bracket is adapted to be coupled with the implement. Each of the one or more mounting assemblies further includes a fastener that removably couples the first bracket with the second bracket via the first arm and the second arm.