Integrated Ball Head Wear Indicator for Uncoupled Inspection
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Solution Overview
Problem
Existing ball head wear indicators for trailer couplings require the coupling to be in a coupled state for wear assessment and cannot distinguish between ball head and coupling shell wear, making it difficult to determine the ball head's wear state, especially when used with different coupling elements.
Innovation Solution
A one-piece ball head design with recesses on its spherical surface, such as grooves, that indicate wear by changing diameter, allowing for direct visualization of wear without additional tools, even in the uncoupled state, and using a contrasting material to prevent dirt accumulation and ensure even wear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate coupling housing with wear indicator is used, then wear can be indicated, but the ball head wear cannot be distinguished from coupling shell wear and additional measuring devices are required
Solution Approach 1:
The wear indicator is integrated directly into the ball head structure as an annular groove, merging the indicator function with the ball head itself. This eliminates the need for separate coupling housing indicators and allows direct visualization of ball head wear without additional measuring devices or complex assembly structures.
2Ease of operation
If the coupling is in uncoupled state, then the ball head is accessible, but wear cannot be assessed without additional measuring devices
Solution Approach 1:
The annular groove is pre-formed on the ball head surface at a specific depth corresponding to the minimum permissible diameter. This preliminary structural feature enables direct visual assessment of wear without requiring additional measuring devices, making wear evaluation convenient and accurate whether the coupling is coupled or uncoupled.
3Ease of manufacture
If the recess is filled with contrasting material, then wear visibility is improved and dirt accumulation is prevented, but manufacturing complexity increases
Solution Approach 1:
The annular groove is filled with a material that has different optical properties (color, reflectivity, or texture) from the ball head surface. This contrasting material enhances wear visibility by creating a clear visual boundary that remains detectable even when the groove is partially worn, while also preventing dirt accumulation in the groove.
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a ball head of a trailer coupling of an agricultural vehicle, comprising an indicator for ball head wear, wherein the indicator is formed integrally with the ball head.