Articulated Steering Control for Soil Compaction Load Distribution
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Solution Overview
Problem
Articulated construction machines, particularly self-propelled soil compaction machines, face challenges with tipping stability and uneven load distribution during high-speed maneuvers, leading to surface grooves due to non-uniform weight distribution across the rollers.
Innovation Solution
A method involving a steering control unit that combines angular adjustments via an articulated pendulum joint and translational adjustments via a crab steering joint to optimize the relative positions of the front and rear ends, ensuring uniform weight distribution and improved driving behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If steering angle is increased to improve maneuverability, then turning capability is improved, but load distribution on drive mechanisms becomes uneven
Solution Approach 1:
The invention adds a crab steering dimension to the traditional articulated steering. While articulated steering rotates the front end around a vertical axis, crab steering translates the front end laterally relative to the rear end. This second degree of freedom allows the system to maintain even load distribution by adjusting the lateral position of the front drive mechanism independently of the steering angle.
2Productivity
If travel speed is increased to improve productivity, then work efficiency is improved, but tipping stability deteriorates
Solution Approach 1:
The crab steering mechanism performs a preliminary lateral adjustment of the front end before sharp steering maneuvers at high speed. By pre-positioning the front drive mechanism through crab steering, the system reduces the sudden lateral weight transfer that would otherwise occur during high-speed turning, thereby maintaining tipping stability while enabling high-speed operation.
3Manufacturing precision
If crab steering adjustment is added to maintain load distribution, then load uniformity is improved, but device complexity increases
Solution Approach 1:
The invention merges the crab steering joint device with the existing articulated joint device. Both mechanisms share common structural elements, hydraulic systems, and control architecture. The crab steering actuator is integrated into the articulated joint assembly, allowing both articulated steering and crab steering functions to be achieved through a unified mechanical and control system rather than separate independent systems.
Data Source
Figure 1~2
Figure 3
Figure 4A~4B
AI summary
The invention relates to a method for steering control of an articulated construction machine, in particular a self-propelled soil compaction machine, in particular a single-drum roller or a tandem roller, by means of a steering control unit, and to an articulated construction machine, in particular a self-propelled soil compaction machine.