A 5-ton-class circulating ball type dual-mode electric power steering device

Abstract

The invention relates to the field of electromechanical systems and motor vehicle application, and in particularly relates to a 5-ton-class circulating ball type dual-mode electric power steering device. The electric power steering device comprises a steering device housing assembly, an input shaft and screw assembly, a sector shaft assembly, a supporting base assembly, a turbine, a worm, an inner end cap assembly, a rotating angle and torque sensor, an outer end cap assembly, a plum connecting sleeve assembly and a motor assembly. A motor serves as a power source; power is transmitted to the input shaft and screw assembly via a worm gear and the worm, and the input shaft and screw assembly outputs torque and angle displacement via a sector shaft. The 5-ton-class circulating ball type dual-mode electric power steering device has two control modes of angle (position) and torque (assisting power).

Description

technical field [0001] The invention belongs to the application field of electromechanical systems and motor vehicles, and in particular relates to a 5-ton recirculating ball type dual-mode electric power steering device. Background technique [0002] From the perspective of the automobile industry, as the number of fuel vehicles continues to grow, vehicle emissions are causing more and more serious pollution to the environment. At the same time, oil, as a non-renewable energy source, is also facing the crisis of depletion. Vehicles and hybrid vehicles have become the focus of the government and society because of their advantages of energy saving and environmental protection, and have become the core development theme of today's wheeled vehicle technology. Electric power steering technology (EPS) has been widely used in domestic and foreign household vehicles due to its significant advantages such as high integration, energy saving, and maintenance-free, but it is mostly us...

AI Technical Summary

Problems solved by technology

At present, the steering system of my country's military wheeled vehicles basically adopts a hydraulic power steering system, and the actuator is a recirculating ball hydraulic power steering device. Therefore, the steering of the vehicle mainly depends on the steering positioning parameters, such as the kingpin caster angle and the kingpin inclination angle. , when the positioning parameter error is large, the vehicle’s ability to return to the center will become poor and unstable, thereby affecting the maneuverability of the vehicle; Determined by the principle of the recirculating ball hydraulic power steering unit, the steering pump in the hydraulic power steering system is powered by the engine. When the engine speed rises at high speed, the pressure of the hydraulic power assist system rises, and the steering power naturally increases. Although the current new steering oil pump can The pressure relief of the oil pump flow is reduced during high-speed steering, but it cannot fundamentally solve the problem of "floating"

[0004] From the perspective of future development trends, with the development of power battery technology, hybrid technology, motor technology, etc., wheeled vehicles are developing rapidly in the direction of digitalization, full electrification, unmanned, and intelligent, while traditional wheeled vehicles turn to The system can no longer meet the needs of the future, and more and more new steering systems such as intelligent steering system, active steering system, and steer-by-wire system have gradually surfaced, and these new steering systems need to rely on electric power steering technology to expand or upgrade

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