Mining Boom Rotation Device with Segmented Units
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Solution Overview
Problem
Existing rotation devices for boom systems in mining and construction rigs face challenges in achieving high precision positioning due to rotational deviations caused by play and deformation, making it difficult to adjust with precision.
Innovation Solution
A rotation device with a separable connection at both rotation units, featuring a non-circular boom cross-section and a planet gear transmission unit, allowing for modular design, easy service access, and increased rigidity, enabling precise adjustments and versatile use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rotation motor is positioned at the outer end of the boom portion, then the boom is maneuverable and can position the feed beam with six degrees of freedom, but rotational deviation occurs due to play and deformation, making high precision positioning impossible
Solution Approach 1:
The boom is divided into multiple portions (first boom portion and second boom portion) with separate rotation units. Each rotation unit can be independently adjusted and serviced without affecting the other, allowing precision correction at each segment while maintaining overall maneuverability.
Solution Approach 2:
The rotation units are designed with adjustable and serviceable components that can be dynamically accessed during operation. The openable intermediate portion allows the system to transition from a closed operational state to an open service state, enabling precision adjustments without compromising maneuverability.
2Volume of moving object
If the rotation device is integrated into the boom structure, then the boom can be manufactured compactly, but access for service and exchange is difficult
Solution Approach 1:
The rotation device is segmented into modular components (first rotation unit, second rotation unit, planet gear transmission units) that can be independently accessed through openable portions. This segmentation maintains compact integration while enabling easy service access to individual components.
Solution Approach 2:
Only the necessary portions of the boom structure are opened to provide access to specific rotation units for service, rather than requiring complete disassembly. This partial opening approach maintains overall compactness while providing adequate service access.
3Ease of manufacture
If standard components and modularisation are used, then the device can be manufactured economically and compactly, but precision positioning becomes more difficult due to play and deformation
Solution Approach 1:
The system uses standard modular components (rotation units, planet gear transmissions) that can be manufactured economically with controlled precision. Each module can be precision-adjusted independently during assembly and service, achieving high overall positioning precision through cumulative modular precision rather than requiring entire system precision.
Solution Approach 2:
The non-circular cross-section of the boom portions is used to change the structural parameters, increasing rigidity and reducing deformation while maintaining compatibility with standard components. This parameter change allows standard economical manufacturing methods to achieve higher precision results.
4Strength
If the boom portions have non-circular cross section, then the boom becomes more rigid with higher loading capacity and less play, but the design and manufacturing becomes more complex
Solution Approach 1:
The boom portions use non-circular (asymmetric) cross-sections to optimize structural strength and rigidity for specific loading conditions. This asymmetric design provides higher loading capacity and reduced play while the modular rotation units simplify the overall system design, compensating for the increased geometric complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables precise positioning and modular functionality, enhancing the boom's loading capacity and versatility, allowing the same rig to be used for different applications with easy equipment exchange and service access.
Implementation Method 1
a toothed transmission unit, and in particular a planet gear transmission unit for transmitting the movement of the respective rotation actuator
Data Source
AI summary
A rotation device (12) for rotation of equipment (13) fastened at the region of a distal end of a boom (9,11), which has a general longitudinal axis, and which is part of a boom device (3) which is fastenable to a carrier (2) for a mining or constructions work rig, wherein the rotation device includes a first rotation unit (R1) arranged to rotate the equipment around an axis (A1) which is essentially parallel to the longitudinal axis of the boom and a second rotation unit (R2) which is arranged to rotate the equipment around an axis (A2), which forms an angle with the longitudinal axis of the boom. The rotation units (R1, R2) are fastened to an angle unit (12′), which is included in the rotation device (12) and has rotational axes (A1, 21; A2,22) extending at an angle with respect to each other, and are connectable to the boom (9,11) as well as to said equipment (13). The invention also concerns a mining or constructions work rig and a boom.