An engineering vehicle walking and steering integrated control device based on duplex pump swing arm linkage

By combining a dual-pump pure mechanical hydraulic system with a roller-connecting rod coupling mechanism, the problems of power waste and steering lag in existing engineering vehicles under harsh working conditions are solved, achieving highly reliable and low-cost integrated control of walking and steering, and enabling zero-radius on-the-spot steering.

CN122143991APending Publication Date: 2026-06-05HUBEI YULONG MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUBEI YULONG MACHINERY
Filing Date
2026-05-05
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing hydraulic transmission systems for engineering vehicles suffer from problems such as power waste, sluggish steering response, complex structure, high cost, and insufficient reliability when balancing high-power straight-line travel and precise steering control. In particular, the stability of electronic components is poor under harsh working conditions, making it difficult to achieve zero-radius on-the-spot steering.

Method used

Employing a purely mechanical hydraulic system based on a dual pump, the driver's operating commands are integrated and transmitted through a roller-link coupling mechanism to achieve synchronous or differential control of the dual pump. This includes the linkage of the steering wheel linkage assembly, the forward/reverse gear linkage assembly, and the swing arm assembly, enabling multiple operating modes for the vehicle.

Benefits of technology

It achieves seamless switching and control of forward, backward, left turn, right turn and stationary turning, improving vehicle maneuverability and flexibility, reducing system complexity and cost, and enhancing reliability and handling precision in harsh environments.

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Abstract

The application provides a kind of engineering vehicle walking steering integrated control device based on double pump swing arm linkage, adopts double pump independent variable + mechanical swing arm linkage, without electromagnetic valve, without complex circuit, pure mechanical hydraulic control, high reliability, can realize zero radius spot steering, greatly improve the vehicle mobility and operation efficiency.The device includes gear reducer, double pump, mechanical control mechanism;Mechanical control mechanism contains steering wheel connecting rod 1, forward and backward block connecting rod 5, swing arm assembly (front pump swing arm 12, rear pump swing arm 16), drum guide assembly.The power output end of gear reducer drives double pump rotation, the output pressure oil of double pump, after speed reduction and torque increase by walking gear reducer, drives vehicle walking, realizes forward, backward, left turn, right turn and spot steering.
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Citation Information

Patent Citations

  • Hydraulic four-wheel drive device

    CN107097641A