A 4x4 electromechanical hydraulic all-wheel steering device

Abstract

The invention provides a 4X4 electromechanical hydraulic all-wheel steering system, the system includes a steering wheel and a steering gear assembly, a front axle steering oil tank assembly, a front axle steering pump, a rear axle steering oil tank assembly, and a front axle steering rod system, rear axle steering hydraulic cylinder assembly, steering return lock mechanism assembly, rear axle steering integrated valve group, all-wheel steering controller assembly, rear axle steering rod system, rear axle electric steering pump assembly, steering wheel and The steering gear assembly is connected with the steering linkage of the front axle. The present invention has developed a brand-new electromechanical hydraulic steering system. The all-wheel steering system with this structure can conveniently switch between the three modes, and can realize the closed-loop control of the steering hydraulic cylinder and the steering wheel and the passive active return of the steering axle and rigidity. The unlocking and locking control of the locking device has many advantages. In addition, the hydraulic pressure source of the front and rear axles is independent, and the system is safe and reliable.

Description

technical field [0001] The patent of the invention relates to a high-reliability electromechanical-hydraulic all-wheel steering system suitable for wheeled vehicles, which belongs to the fields of mechanical, hydraulic and motor vehicle applications. Background technique [0002] Wheeled equipment is an important part of the army's weapon equipment system, and it is an important land mobile platform for the land, sea and air forces to realize the development strategy of "global mobility, three-dimensional protection, multi-dimensional and multi-energy". Vehicle mobility, broadly speaking, refers to the ability to quickly reach space and regions, including tactical mobility and strategic / combat mobility. For wheeled vehicles, the improvement of mobility is more focused on improving soft ground and random off-road ground. Passing ability, plateau and mountain driving performance, air transport performance, etc. The essence of the wheeled vehicle steering system is based on th...

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Problems solved by technology

[0004] (2) Compared with engineering vehicles, wheeled vehicles have more complex working conditions and harsher environments. The response characteristics and impact resistance of the follow-up steering axle are common issues that affect vehicle handling stability and safety.

[0006] From the above comparison, the variable vehicle structure, complex application environment, and harsh service conditions of wheeled vehicles have brought great challenges to the reliable application of all-wheel steering technology on wheeled vehicles. The technical framework of the all-wheel steering system of engineering vehicles cannot meet the requirements of use. Therefore, it can simultaneously have the dynamic response and impact resistance of the follow-up steering axle in complex environments, and the median steering stiffness of the follow-up steering axle under nonlinear loads and The all-wheel steering system with the three core capabilities of the active return of the follow-up steering axle under the condition of system failure and vehicle damage will become a high-reliability all-wheel steering system suitable for wheeled vehicles

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