Working Vehicle Vertical Arm Support Mechanism Stability
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Solution Overview
Problem
Working vehicles with radial type supporting mechanisms face instability and increased forward movement distance during loading, while those with vertical type mechanisms suffer from poor operability due to complex movement loci and weight distribution changes during arm oscillation.
Innovation Solution
A working vehicle with a vertical type supporting mechanism, featuring control links, an arm cylinder, and a lift link, where pivotal connection points are strategically positioned to allow the arm to oscillate vertically, minimizing longitudinal movement and maintaining stability, with a compact design and adjustable movement locus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a radial type supporting mechanism is used, then the arm can be supported by a simple pivotal connection, but the vehicle becomes unstable and moves forward excessively during loading operations
Solution Approach 1:
The supporting mechanism is divided into multiple link members (first link member and second link member) connected in series between the vehicle body and the arm. This segmentation allows each link to be optimized for specific functions, with the first link controlling arm elevation and the second link controlling forward movement, thereby resolving the contradiction between structural simplicity and vehicle stability during loading operations.
2Stability of the object's composition
If a vertical type supporting mechanism is used, then the arm moves substantially vertically improving stability, but the movement locus becomes complex reducing operability
Solution Approach 1:
The mechanism uses two independently controllable link members where the first link member elevates the arm vertically and the second link member adjusts the forward movement. This dynamic control system allows the arm to follow a substantially vertical locus during elevation while maintaining simple operability through separate control of each link member, resolving the contradiction between stability and ease of operation.
3Ease of operation
If the arm is lifted while drawing an arc in radial type mechanism, then the bucket can be positioned horizontally, but the vehicle must be located at a large distance from the dump truck increasing forward movement distance
Solution Approach 1:
The second link member acts as an intermediary between the vehicle body and the arm, specifically designed to control and minimize the forward movement of the arm during elevation. By introducing this intermediate link with optimized geometry, the system achieves both horizontal bucket positioning and reduced forward movement distance, allowing the vehicle to operate closer to the dump truck.
4Power
If the arm oscillates vertically with heavy load in radial type mechanism, then loading capacity is maintained, but the vehicle risks overturning forward
Solution Approach 1:
The supporting mechanism is divided into multiple link members (first link member and second link member) connected in series between the vehicle body and the arm. This segmentation allows each link to be optimized for specific functions, with the first link controlling arm elevation and the second link controlling forward movement, thereby resolving the contradiction between structural simplicity and vehicle stability during loading operations.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
In a state in which an arm 21 is oscillated to a lowest position, each control link 22 is arranged to be approximately horizontally extended backward from one end side where the control link 22 is pivotally connected to a pivotal connection point A, and is pivotally connected to the arm 21 at a pivotal connection point D on the other end side of the control link 22. An arm cylinder 23 is located on a rear side of the pivotal connection point D, is arranged to be approximately vertically extended upward from one end side where the arm cylinder 23 is pivotally connected to a pivotal connection point B, and is pivotally connected to the arm 21 at a pivotal connection point E on the other end side of the arm cylinder 23. The lift link 24 is located on a rear side of the arm cylinder 23, is arranged to be approximately vertically extended upward from one end side where the lift link 24 is pivotally connected to a pivotal connection point C, and is pivotally connected to the arm 21 at a pivotal connection point F on the other end side of the lift link 24. The pivotal connection points E and F are located above the pivotal connection point D.