Active steering device for vehicles

Abstract

The invention discloses an active steering device for vehicles, which consists of an active steering oil cylinder and a gear and rack mechanism. The steering device particularly comprises piston rods, an oil cylinder drum, a piston, a steering gear and a steering device shell; the outer circle of the oil cylinder drum is provided with racks which are engaged with the steering gear; the racks and the steering gear are mounted in the steering device shell together; the active steering oil cylinder is a double-piston-rod oil cylinder; two piston rods are respectively connected with the left and right sides of the piston; the piston is arranged in the oil cylinder drum; the piston rod is specially provided with an oil path which is communicated with the position near the piston through the outer ends at two sides; and oil ports are arranged at the outer ends at two sides of the piston rod. The vehicle active steering device disclosed by the invention uses mechanical connection, has high safety, and the active steering oil cylinder and the steering device are integrated into a whole so that the vehicle active steering device achieves the advantages of small size, low cost, no poor performance such as lubrication and the like, and can be combined with the traditional power steering system to form a system.

Description

technical field [0001] The invention relates to an automobile mechanical steering device, in particular to an automobile active steering gear. Background technique [0002] Automobile steering technology has gone through: traditional mechanical steering system, hydraulic power steering system (Hydraulic Power Steering System, referred to as HPS system), electronically controlled hydraulic power steering system (Electronic Control Hydraulic Power Steering System, referred to as ECHPS system), and has been developed to the present Popularized and applied electro-hydraulic power steering system (Electro-HydraulicPower Steering System, referred to as EHPS system) and electric power steering system (ElectricPower Steering System, referred to as EPS system). The active steering system with better handling stability and safety performance is currently a research hotspot in the world. The latest active front steering system (Active FrontSteering System, referred to as AFS system) ha...

AI Technical Summary

Problems solved by technology

The disadvantage is: poor safety, due to the cancellation of the mechanical connection, when the system fails (such as power failure), the driver cannot control the steering, which may easily lead to traffic accidents

BMW uses a hybrid drive system of hydraulic power steering and motor-driven active steering. The shortcomings of this system are: the active steering transmission mechanism is bulky and takes up a lot of space, which has an impact on the space layout in the car; hydraulic and motor drive The two systems are used together, and the cost is high

The disadvantage of this system is: the seal of the slide rail is a weak point, and the oil cylinder occupies a large space, which is not easy to arrange

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