Mining Machine Carriage Tubular Guide Curvature
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mining machines face challenges in achieving rigidity and stability on low-structured terrain, particularly in low seams, while maintaining mobility on crowns and ditches, due to reduced structural dimensions.
Innovation Solution
The mining machine frame is designed with a modified carriage structure featuring tubular guides with curved generatrices and an upwardly open chute configuration, allowing for tiltable guide rods and enhanced pivotability, which increases stability and flexibility, enabling better mobility on uneven terrain without compromising rigidity or strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the machine frame is designed with reduced structural dimensions for low seams, then the machine can operate in low-structured terrain, but the rigidity and stability of the frame are compromised
Solution Approach 1:
The tubular guides are designed with curved generatrices instead of straight lines, creating an arched structural form that provides inherent rigidity and stability. This curved geometry allows the frame to maintain strength while using shorter structural dimensions suitable for low seams.
Solution Approach 2:
The guide rods are made tiltable relative to the machine frame, adding a degree of freedom in the vertical dimension. This allows the cutting head to adapt to uneven terrain while the frame maintains its compact dimensions, resolving the conflict between size reduction and stability.
2Strength
If the carriage is designed as a self-supporting box section, then the rigidity is improved, but the conveyor has limited mobility and may collide with frame components
Solution Approach 1:
Instead of making the carriage a closed box section that constrains the conveyor, the design inverts the approach by using an open chute structure where the conveyor can move freely. The rigidity is achieved through the tubular guide structure and its connection to the frame, not through enclosing the conveyor space.
Solution Approach 2:
The carriage is designed with pivotability around a vertical axis, allowing it to dynamically adjust its position and orientation. This dynamic capability enables the conveyor to navigate curves and avoid collisions while maintaining structural integrity through the tubular guide system.
3Stability of the object's composition
If the guide rods are fixed to the carriage with long tubular guides, then the carriage displacement is constrained, but the machine loses flexibility on crowns and ditches
Solution Approach 1:
The tubular guides have curved generatrices that accommodate the tilting motion of the guide rods. This curved geometry allows the guide rods to tilt and adjust to terrain variations while maintaining stable guidance of the carriage along the longitudinal direction.
Solution Approach 2:
The guide rods are given the capability to tilt in the vertical dimension while guiding the carriage in the horizontal dimension. This multi-dimensional freedom allows the machine to navigate crowns and ditches while maintaining stable carriage displacement through the curved tubular guides.
Data Source
AI summary
In a cutting machine (1) with cutting heads or rollers (7) rotationally mounted on a pivotable cutting arm (6), including a loading ramp or a conveyor (9) extending in the direction to the mine face for receiving and removing the cut material, wherein the cutting arm (6) is mounted on a carriage (4) displaceable on guides extending in the longitudinal direction of the machine, the carriage (4) carries guide rods (12) extending in the longitudinal direction of the machine and engaging in tubular guides (13) of the machine frame (3) carrying a chassis (2).