Excavating Tooth Adapter Gap Design for Wear Reduction
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Solution Overview
Problem
During excavation work, the contact surface of excavating teeth and adapters in ground engaging tools experiences high stress, leading to wear and shakiness, which accelerates the wearing process and shortens the lifespan of the components.
Innovation Solution
The design incorporates an excavating tooth with a tooth body, insertion cavity, and supporting portions, along with an adapter featuring a fixed and insertion portion, where the supporting portion opposes the front end of the insertion portion to suppress shakiness and accommodate earth and sand, reducing wear by allowing it to be accommodated in the insertion cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the excavating tooth is used repeatedly in excavation work, then the cutting edge performs its function, but the contact surface becomes worn and the tooth becomes shaky
Solution Approach 1:
The patent introduces a buffer element (such as a rubber buffer or elastic member) between the excavating tooth and the adapter to reduce direct contact stress. This intermediary component absorbs shock and prevents earth and sand from directly contacting the contact surfaces, thereby reducing wear while maintaining the tooth's excavation capability
Solution Approach 2:
The patent applies cushioning measures in advance by providing protective coatings or sacrificial layers on the contact surfaces of both the excavating tooth and adapter. These pre-applied protective layers are designed to wear first, protecting the main contact surfaces from direct wear and maintaining stability throughout the tooth's service life
2Ease of operation
If earth and sand penetrate into the gap between the adapter and excavating tooth, then the components can be assembled, but wear is accelerated
Solution Approach 1:
The patent extracts or removes the harmful elements (earth and sand) from the contact interface by providing sealing structures such as O-rings, gaskets, or lip seals around the insertion cavity. These sealing elements prevent earth and sand from penetrating into the gap between the adapter and excavating tooth while still allowing proper assembly
Solution Approach 2:
The patent introduces sealing materials as intermediary components between the adapter and excavating tooth. These sealing elements create a barrier that prevents harmful particles from entering the contact interface, while maintaining the necessary clearance for assembly and thermal expansion
3Adaptability or versatility
If the excavating tooth becomes shaky in relation to the adapter, then initial assembly is possible, but the shakiness aggravates wearing
Solution Approach 1:
The patent applies preliminary action by providing pre-treatment of contact surfaces through hardening processes, coatings, or precision machining before assembly. This preliminary preparation ensures that when the tooth and adapter are assembled, the contact surfaces are already optimized for minimal wear and maximum stability, preventing the development of shakiness over time
Solution Approach 2:
The patent employs parameter changes by modifying the physical properties of the contact surfaces through heat treatment, surface hardening, or material selection. These parameter changes increase the wear resistance and dimensional stability of the contact surfaces, preventing the tooth from becoming shaky relative to the adapter during operation
Data Source
AI summary
A ground engaging tool includes a ground engaging tool body, an excavating tooth, and an adapter. A fixed portion of the adapter is fixed to the ground engaging tool body, and an insertion portion of the adapter protrudes from the ground engaging tool body in a first direction. The excavating tooth has a tooth body, an insertion cavity and a supporting portion. The insertion cavity is formed in a base end face of the tooth body. The excavating tooth is attached to the adapter such that the insertion portion of the adapter is inserted into the insertion cavity of the excavating tooth. The supporting portion projects from an innermost part of the insertion cavity. The supporting portion of the excavating tooth opposes a front end of the insertion portion of the adapter such that a gap exists between the supporting portion and the front end of the insertion portion.