Union steering device

Abstract

The invention relates to a union steering device and belongs to the technical field of an automobile steering system. The device comprises a steering wheel, hand wheels, a steering pipe column, a hydraulic power assisted steering gear, a controller, a motor assembly, a worm and gear reducing mechanism assembly and an automobile speed sensor, wherein the worm and gear reducing mechanism assembly is installed between the steering pipe column and the steering wheel, the motor assembly is installed on one side of the worm and gear reducing mechanism assembly, and the worm and gear reducing mechanism assembly is connected with the motor assembly. The union steering device achieves automobile speed sensing control over portable steering in on-site or low-speed driving, and stable steering in high-speed driving and solves the problem of excessively-large meshing stress of a gear and a rack. Due to the fact that the union steering device needs small output torque, the speed ratio of a motor reducing mechanism is low, influences on reverse efficiency and return-to-center performance are small, and the application range of the union steering device can cover all automobile types.

Description

technical field [0001] The invention relates to a combined steering device, belonging to the technical field of automobile steering systems. Background technique [0002] Existing automobiles have generally applied hydraulic power steering technology, and electric steering technology has also begun to be gradually popularized and applied. The hydraulic power steering of the car is provided by the hydraulic system to assist the steering. The hand force acts on the steering wheel, and is transmitted to the input shaft of the steering gear through the steering column and transmission shaft, and the control valve of the hydraulic steering gear is opened, so that the pressure of the hydraulic system is distributed to the left and right chambers of the power cylinder according to the direction of the hand force , to achieve power steering. The advantage is that different steering assistance can be obtained through different hydraulic cylinder diameters, so the scope of applicati...

AI Technical Summary

Problems solved by technology

[0008] Its disadvantages are: 1. Due to the output power of the motor, its application range is also limited

When the front axle load reaches 1500-2000kgf, it is not suitable to use electric steering; 2. Since electric power steering must rely on the input shaft to transmit torque, the meshing stress of the gear and rack of the mechanical steering gear is much greater than that of the hydraulic power steering gear and ordinary steering gear. Mechanical steering gear, the gear shape is easy to wear and affect the steering function, resulting in abnormal noise and other faults; 3. Due to the addition of a worm gear pair with a large speed ratio in the entire transmission system, the reverse efficiency is reduced, which affects the overall performance of the vehicle. Back to normal performance

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