Telescopic Lifting Arm With Asynchronous Extension for Load Balance
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Solution Overview
Problem
Conventional telescopic arms for self-propelled operating machines face limitations in lifting height and load capacity due to mechanical stress and weight increases, leading to constraints on maximum extension and load that can be moved, which results in reduced functional mechanical strength and increased costs.
Innovation Solution
A telescopic arm design featuring a main structure with multiple coaxial tubular elements and a simultaneous asynchronous actuation system, where at least two tubular elements can be independently and simultaneously extended at different speeds, maximizing load capacity while maintaining the center of gravity close to the center of rotation, thereby reducing mechanical stress and avoiding the need for increased material thickness or dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the number of sliding members is increased to achieve greater lifting heights, then the lifting height is improved, but the mechanical stresses on the arm structure increase
Solution Approach 1:
The patent implements dynamic actuation of telescopic segments where at least two segments can be extended at different speeds independently. This dynamic control allows optimization of the center of gravity position during extension, balancing mechanical stresses on the arm structure while achieving greater lifting heights without proportionally increasing structural stress
2Strength
If the material thickness or dimensions are increased to support greater loads, then the load capacity is improved, but the weight of the machine increases
Solution Approach 1:
The patent uses dynamic speed control of telescopic segments to maintain the center of gravity close to the center of rotation during arm extension. This dynamic balancing reduces the mechanical moments and stresses on the arm structure, allowing the use of lighter materials or thinner walls while maintaining load capacity, thereby reducing overall machine weight
3Strength
If the material thickness or dimensions are increased to support greater loads, then the load capacity is improved, but the manufacturing costs increase
Solution Approach 1:
The patent implements a control system that dynamically adjusts the extension speeds of different telescopic segments to optimize center of gravity positioning. This dynamic control enables the arm to support greater loads with the same structural dimensions, avoiding the need for more expensive thick-walled tubes or high-strength materials, thereby reducing manufacturing costs
Data Source
AI summary
Described is a telescopic lifting arm (1) for self-propelled operating machines (10) comprising three tubular elements (21, 22, 23, 24, 25, 26), with a decreasing cross-section and telescopically connected to each other to define a supporting structure, designed to move between a retracted configuration wherein said tubular elements (21, 22, 23, 24, 25, 26) are inserted one in the other and an elongated configuration wherein two tubular elements are partly extracted. The arm (1) comprises actuator means (5) associated with the tubular elements (21, 22, 23, 24, 25, 26) and configured for actuating two tubular elements (21, 22, 23, 24 25, 26) for pulling them out independently from one other and with different speeds.