Four-direction adjustable automobile steering column with energy absorption function

Abstract

The invention relates to a four-direction adjustable automobile steering column with an energy absorption function and belongs to the technical field of automobile steering systems. The automobile steering column comprises a steering shaft assembly, an upper column tube assembly, a lower column tube assembly, a bracket assembly and an adjustment locking device, wherein the steering shaft assembly is sleeved with the upper column tube assembly and the lower column tube assembly; the upper column tube assembly and the lower column tube assembly are in interference fit with each other; the bracket assembly is arranged on the upper column tube assembly and the lower column tube assembly; one end of the bracket assembly is connected with the upper column tube assembly through the adjustment locking device, and the other end of the bracket assembly is connected with the lower column tube assembly through a locking bolt. The automobile steering column disclosed by the invention is easy to machine and high in assembling property; functions of adjusting the angle and the height of the automobile steering column and the function of absorbing energy within a longer travel range are realized; the problems that the conventional automobile steering column is low in fixed frequency, poor in driving operation handfeel, unstable in energy absorption property, lower in consistency and smaller in energy absorption distance are solved; therefore, the driving safety is improved.

Description

technical field [0001] The invention relates to a four-way adjustable automobile steering column with an energy-absorbing function, belonging to the technical field of automobile steering systems. Background technique [0002] At present, the domestic four-way adjustable steering column mostly adopts a two-stage column tube clearance fit structure, and an injection molding structure of the upper mounting bracket to realize the energy absorption function of the steering column. In this way, when the car collides, the external force borne by the steering wheel is transmitted to the injection molding structure of the upper mounting bracket through the steering shaft and the column tube. When the impact force of the collision is greater than the suction capacity of the injection molding structure of the upper mounting bracket, the steering column realizes the collapse function and protects driving. The role of members; but its existing problems are: [0003] 1. The natural freq...

AI Technical Summary

Problems solved by technology

[0003] 1. The natural frequency of the steering column is low, and the driving feel is poor

Due to the two-stage column tube gap fit structure, the column rigidity is poor, resulting in low natural frequency of the steering column, and the vibration of the steering wheel will be felt during driving, which will affect the driving comfort

[0004] 2. Unstable suction capacity and poor consistency

Due to the comprehensiveness of the manufacturing accuracy of the plate thickness of the upper mounting bracket and the matching size of the V-groove of the pull-off lock, the consistency of the hole size and size of the pull-off lock, the performance of the injection molding material, the stability of the equipment, and the injection molding processing parameters (injection pressure, injection time, etc.) Due to the influence of factors, the suction capacity after injection molding is unstable and poor in consistency, which leads to poor suction capacity of the steering column assembly

[0005] 3. The energy absorption distance is small

Due to the influence of the layout of the vehicle, the distance between the upper and lower mounting brackets is relatively small, resulting in a relatively small energy absorption distance of the steering column

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