Construction Boom Hose Reel Layout for Accurate Milling Direction
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Solution Overview
Problem
Existing boom designs for construction machines often result in off-center feeding of hose lines, leading to lateral forces that cause undesired deviations in the milling direction during operations like slot creation, due to the staggered arrangement of hose reels.
Innovation Solution
The boom design features a cantilever arm with a free space along its longitudinal axis to mount the hose reel, allowing the hose line to extend parallel to the axis, minimizing lateral forces and eliminating the need for transverse deflection rollers, with the hose drum's axis of rotation oriented orthogonally to the arm, and a stable arrangement maintained by symmetrical side walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the hose reel is offset to the side or arranged at an angle on the boom arm, then space constraints are satisfied, but lateral forces are applied to the working device causing deviations from the predetermined milling direction
Solution Approach 1:
The hose reel is repositioned from a lateral offset arrangement to a central arrangement along the longitudinal axis of the boom arm. This dimensional repositioning allows the hose line to be fed centrally to the working device, eliminating lateral forces while maintaining space efficiency through the longitudinal configuration.
2Manufacturing precision
If the hose drum is arranged centrally along the longitudinal axis of the boom arm, then lateral forces on the working device are minimized, but the structural design becomes more complex
Solution Approach 1:
The boom arm is designed with a multi-functional free space along its longitudinal axis that simultaneously accommodates the hose reel and maintains structural integrity. This free space serves both as a functional mounting location for central hose feeding and as part of the overall structural design, eliminating the need for separate lateral mounting structures.
3Area of stationary object
If a staggered arrangement of the hose reel is used, then space is saved on the boom arm, but transverse deflection rollers are required to align the hose line
Solution Approach 1:
The hose reel is extracted from the lateral offset position and repositioned to the central longitudinal axis of the boom arm. This extraction eliminates the need for transverse deflection rollers, as the hose line can now be fed directly along the longitudinal axis to the working device without requiring additional alignment components.
Data Source
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AI summary
The invention relates to a boom for a construction machine (10), comprising a boom arm (22) which can be attached at its lower end to a carrier device (12) and has a suspension device (24) for a work tool (18) at its upper end, wherein at least one hose reel (40) for a hose line is rotatably mounted on the boom arm (22). According to the invention, the boom arm (22) has a clearance (30) in its central region along its longitudinal axis, in which the at least one hose reel (40) is arranged.