Wearing Point Longitudinal Elevation for Quick Coupling Wear
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Solution Overview
Problem
Existing wearing-point devices on soil-working implements, such as ploughs and cultivators, face issues where the quick coupling wears down simultaneously with the wearing point, leading to weakening and potential breakage of the wearing point, especially as the transverse eminence wears down.
Innovation Solution
A wearing point design featuring a longitudinal elevation with an increasing height from the front to the quick-coupling attachment, resulting in inclined wearing surfaces that deflect material sideways and provide a more favorable geometry for the transverse eminence, enhancing durability and reducing crack growth, with a maximum height of 8-12 mm and a ratio of 0.15-0.30 to the coupling mount width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transverse eminence is used to protect the quick-coupling attachment, then the durability of the quick-coupling attachment is improved, but as the eminence wears down, the wearing point is weakened and tends to break
Solution Approach 1:
The patent introduces a longitudinal elevation (third dimension) in addition to the transverse eminence. This longitudinal feature creates downward-sloping rear edges that redirect material flow away from the quick-coupling attachment, providing protection through a different geometric dimension rather than relying solely on the transverse eminence height
Solution Approach 2:
The wearing point is designed with non-uniform geometry featuring a longitudinal elevation with downward-sloping rear edges. This creates localized zones with different functions: the elevated portions redirect material flow, while the attachment portions maintain structural integrity. The geometry is optimized locally to balance material redirection with structural strength
2Duration of action of stationary object
If the quick coupling wears in step with the wearing point, then the quick coupling provides continuous protection, but the wearing point becomes weakened and prone to breakage
Solution Approach 1:
The patent extracts the material-redirection function from the transverse eminence and assigns it to the longitudinal elevation with downward-sloping rear edges. This separation allows the transverse eminence to focus on providing structural support and crack resistance, while the longitudinal features handle material flow management, reducing the burden on the eminence and preventing premature wear-related failures
3Reliability
If the transverse eminence is made taller to protect against wear, then the durability increases, but the risk of crack growth and breakage increases
Solution Approach 1:
Instead of increasing transverse eminence height in one dimension, the patent adds a longitudinal elevation dimension with downward-sloping rear edges. This provides the necessary material protection through extended geometry that redirects material flow, while maintaining more favorable stress distribution and reducing crack initiation risks associated with excessive height in a single dimension
Data Source
Figure 1~2
Figure 3~5
AI summary
A wearing-point device (22) with a quick-coupling formed from a coupling portion (211) of a wearing-part holder (21) and corresponding attachment portions (223) of the wearing point (22), in which a longitudinal elevation (224) extends with a desired height from a front portion (221) towards the attachment portion (223), sliding surfaces (222, 222') extending in a downward-sloping manner from the longitudinal centre plane of the wearing point (22) in the directions of opposite side edges (228) of the wearing point (22) and forming a downward-sloping rear edge (227) that forms an interface towards the attachment portions (223).