Underground Loader Bucket Paddle Plate Reinforcement
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Solution Overview
Problem
Underground loading machines face challenges in maintaining structural integrity and preventing premature wear due to asymmetrical forces when operating in confined spaces with hard materials, particularly in the bucket's lower floor, which is not adequately reinforced.
Innovation Solution
A bucket design featuring a paddle plate with a trumpet-shape attached to the underside, spaced apart from the bucket floor with spacer wedges to create a separation gap, providing additional reinforcement and preventing collapse, while maintaining a low profile and efficient material handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bucket floor is reinforced with additional plates and structures, then the structural integrity and wear resistance is improved, but the device complexity and weight increase
Solution Approach 1:
The bucket floor reinforcement is divided into multiple discrete components: a floor plate, a paddle plate, and multiple spacer wedges positioned at different locations. This segmentation allows each component to perform its specific function while distributing the reinforcement needs across several simpler parts rather than one complex monolithic structure.
Solution Approach 2:
The paddle plate is positioned within the bucket shell assembly, with spacer wedges nested between the floor plate and paddle plate. This nesting arrangement allows the reinforcement components to be integrated within the existing bucket structure without adding external complexity.
2Duration of action of stationary object
If the bucket floor is reinforced with additional plates and structures, then the wear resistance is improved, but the weight of the bucket increases
Solution Approach 1:
Reinforcement is applied locally only where wear and stress occur most severely - on the bucket floor and at the paddle plate location - rather than uniformly throughout the entire bucket. The spacer wedges are positioned specifically at high-stress areas to provide targeted reinforcement.
Solution Approach 2:
The reinforcement system combines different material components (floor plate, paddle plate, spacer wedges) that can be made from wear-resistant materials specifically suited for high-stress areas, creating a composite structure that enhances durability without requiring the entire bucket to be made from heavy high-strength material.
3Adaptability or versatility
If the bucket is designed with a low profile for underground operation, then the adaptability to confined spaces is improved, but the structural strength against asymmetrical forces deteriorates
Solution Approach 1:
The floor plate, paddle plate, and spacer wedges are pre-installed reinforcement structures that prepare the bucket floor to withstand asymmetrical forces before the bucket is subjected to heavy loading in confined underground spaces. This preliminary reinforcement allows the low-profile design to maintain adequate strength.
Solution Approach 2:
The reinforcement approach adds structural strength in the vertical dimension (through the thickness of the floor plate and spacing created by wedges) without increasing the horizontal footprint of the bucket, thereby maintaining the low-profile adaptability to confined spaces while improving strength against asymmetrical forces.
Data Source
AI summary
A bucket for an underground loading machine includes an opened bucket front and a concaved bucket back. To provide abrasive wear resistance, the bucket includes a paddle plate joined to the bucket underside of the bucket floor. The paddle plate can have a trumpet-shape tapering from flared forward edge to a plate tail disposed toward the concaved bucket back. The bucket may be configured as a wedge bottomed bucket and include a plurality of spacer wedges disposed between and spacing apart the bucket underside and the paddle plate.