Automotive steering system

Abstract

The invention discloses an automotive steering system which can effectively improve the NVH (noise vibration and harshness) capability of an automobile. The automotive steering system comprises a dashboard beam, a steering wheel and a steering-wheel steering column, wherein the steering-wheel steering column is connected with the steering wheel, the two ends of the dashboard beam are connected with an automotive body by a beam-fixed support, the middle part of the dashboard beam is fixedly connected with an automotive fore-cabin and the steering-wheel steering column by a fore-cabin connecting support, and the beam-fixed support and the fore-cabin connecting support are both in a box-type structure which is provided with a main body and two wing plates arranged at the two sides of the main body. In the automotive steering system disclosed by the invention, the parts of the automotive steering system are connected and fixed by box-type supports, and the rigidity of each box-type support is larger, thereby ensuring that the natural frequency of the steering system does not significantly decrease in the process of installation so as to meet the NVH capability of the steering system in an integral automobile state.

Description

A car steering system technical field The invention belongs to the technical field of automobile manufacturing, and in particular relates to an automobile steering system. Background technique The mechanism used to change the driving direction on the car is called the car steering system. The steering system is generally composed of a steering wheel, a steering column, and an instrument panel beam. During the driving process of the vehicle, the driver drives the steering system by controlling the steering wheel to deflect the steering wheel at a certain angle to realize the steering function, so the vibration characteristics of the steering system can be directly perceived by the driver through the steering wheel, especially in idling conditions, the steering system The vibration characteristics of the car are one of the key factors of the NVH (Noise Vibration Harshness) performance of the car. The cause of steering wheel vibration at idle speed is that the second-order ...

AI Technical Summary

Problems solved by technology

However, in actual production, the connection area between the steering system and the body (the two ends of the beam and the connection position of the front cabin) mostly adopts bent parts. This connection method has the following disadvantages: 1. The natural frequency of the steering system will drop significantly, and it may 2. The entire steering system will also have a partial mode, and there will be abnormal noises during driving; 3. The steering system has low stiffness, resulting in the steering wheel not returning well

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