Ground Engaging Tip Assemblies with Multi-Dimensional Bearing Surfaces
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Solution Overview
Problem
Existing earth-working machines with ground engaging implements face issues of increased stress, relative motion, and wear at the nose and wear member interfaces, leading to early failure and increased load on retention mechanisms.
Innovation Solution
A ground engaging tip assembly comprising a ground engaging tip with a specific inner surface configuration and an adapter with a corresponding nose portion, designed to maximize bearing surface contact area and frictional forces under load, thereby reducing stress and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple nose and socket interface is used, then the structure is easier to manufacture, but the bearing surface contact area is insufficient leading to increased stress and wear
Solution Approach 1:
The patent applies local quality by creating multiple bearing surfaces with specific geometric characteristics at critical locations. The nose includes a first bearing surface and second bearing surface, while the socket includes corresponding first and second bearing surfaces. These surfaces are positioned at specific locations to maximize contact area and distribute stress, directly addressing the wear problem while maintaining manufacturing feasibility through standardized geometric features.
Solution Approach 2:
The patent transitions from a simple planar interface to a multi-dimensional bearing surface configuration. By adding multiple bearing surfaces at different orientations and positions (first and second bearing surfaces on both nose and socket), the contact area is expanded into multiple dimensional spaces, thereby distributing load more effectively and reducing stress concentration without significantly complicating the manufacturing process.
2Reliability
If the bearing surface contact area is increased, then stress and wear are reduced, but the device complexity increases
Solution Approach 1:
The patent merges the bearing surface functions into an integrated nose and socket assembly where multiple bearing surfaces are combined within a unified structural framework. The first and second bearing surfaces on both the nose and socket are designed as part of a single cohesive interface, allowing simultaneous achievement of high contact area and controlled complexity through unified manufacturing and assembly processes.
3Reliability
If frictional forces are increased to reduce relative motion, then wear is reduced, but the load on the retention mechanism increases
Solution Approach 1:
The patent segments the bearing surfaces into multiple distinct contact points (first bearing surface, second bearing surface on both nose and socket). This segmentation allows frictional forces to be distributed across multiple surfaces rather than concentrated at a single interface, reducing the total frictional load on any single retention mechanism while still effectively preventing relative motion and reducing wear through cumulative frictional resistance.
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 reduces stress and wear on the tip assembly, enhances load distribution, and prolongs the useful life of the implement by minimizing relative motion and increasing frictional forces.
Implementation Method 1
maximize bearing surface contact area and frictional forces under load
Data Source
AI summary
A ground engaging tip assembly includes a ground engaging tip, an adapter, and a retention mechanism. The ground engaging tip includes an inner surface extending inward from a rear edge defining a nose cavity within the ground engaging tip. The nose cavity includes a front inner surface, top inner surface, bottom inner surface, and oppositely disposed side inner surfaces. The top inner surface includes a front portion proximate the front inner surface comprising a front central surface connecting two opposing front side-sloping surfaces and a rear portion proximate the rear edge comprising a rear central surface connecting two opposing rear side-sloping surfaces. The bottom includes a tapered bottom channel. The adapter includes a nose portion configured to be inserted into the nose cavity of the ground engaging tip. The retention mechanism is configured to secure the ground engaging tip to the adapter.