Excavator Bucket Coupling Structure to Prevent Bracket Cracking
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Solution Overview
Problem
Existing excavator buckets require alternating between general and tilt couplers, leading to inconvenience and potential cracking at the coupled portions due to long use or heavy loads.
Innovation Solution
An excavator bucket design that allows both general and tilt couplers, featuring a unique coupling structure with specific cover and support parts, brackets, and rod insertion portions to enhance strength and rigidity, distributing external forces to prevent cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a general coupler or tilt coupler is used to connect the excavator bucket, then the bucket can perform specific functions (rotation in forward and backward directions or rotation in left and right directions as well as forward and backward directions), but the coupled portion may crack due to long use or large weight and force applied
Solution Approach 1:
The coupling bracket is designed with a universal structure that can accommodate both general couplers and tilt couplers. The bracket includes a coupling rod insertion portion with positioning structures that work with different coupler types, allowing the same bucket to perform both general rotation and tilt rotation functions without requiring separate coupling mechanisms for each function.
Solution Approach 2:
The coupling bracket incorporates a bent portion with a specific curvature radius that distributes stress evenly across the coupling structure. This curved geometry prevents stress concentration at sharp corners, thereby preventing cracks in the coupled portion while maintaining compatibility with different coupler types.
2Strength
If the cover part height is increased to improve strength and rigidity, then the coupled portion is less likely to crack, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The cover part includes a bent portion with a specific curvature radius that provides structural strength and rigidity without requiring excessive material or complex geometry. The curved shape naturally distributes loads and prevents stress concentration, achieving high strength with a relatively simple single-piece structure that is easy to manufacture.
3Ease of manufacture
If the coupling structure is simplified to reduce manufacturing complexity, then the production cost decreases, but the strength and rigidity of the coupled portion may be compromised
Solution Approach 1:
The coupling bracket is designed as a single integrated piece that combines multiple functional elements (coupling rod insertion portion, bent portion, support surfaces) into one manufacturable component. This segmentation approach allows the complex coupling structure to be produced as a single unit using standard manufacturing processes, maintaining both strength and ease of manufacture.
Solution Approach 2:
The bent portion with optimized curvature radius provides the necessary strength and rigidity through its geometric shape rather than through additional material or complex assembly, allowing the coupling structure to be manufactured as a simple single-piece component with high structural performance.
Data Source
AI summary
Provided is an excavator bucket including a bottom part forming bottom thereof, bent upward, and extending in a rear direction thereof, first and second side parts coupled to both sides of the bottom part, a cover part forming top thereof, a support part coupled to at least a portion of the cover part and at least a portion of the bottom part and forming the inner surface thereof, a first coupling bracket coupled to the cover part, the support part, and the bottom part and protruding upward and outward therefrom, and a second coupling bracket located on a position symmetrical to the first coupling bracket, wherein the cover part comprises a first cover part located between the first coupling bracket and the first side part and a second cover part located between the first coupling bracket and the second coupling bracket, and when viewed on the side of the excavator bucket, a height of the first cover part traversing the first coupling bracket is higher than a height of the second cover part traversing the first coupling bracket.