An energy-absorbing structure of a steering column assembly

Abstract

The invention discloses an energy absorption structure for a steering column assembly. The energy absorption structure comprises a rack and a gear block, the rack is arranged on a steering shaft of the steering column assembly, and the gear block is arranged on a connection support of the steering column assembly and capable of radially moving along the steering shaft and can be meshed with the rack to provide an axial retention force for the steering shaft. In the energy absorption structure for the steering column assembly, the rack and the gear block are arranged additionally on the basis of adoption of the connection support and a body support for providing the axial retention force, the axial retention force of the steering shaft is further increased by cooperation of the rack and the gear block, and accordingly stability in collapse of a steering wheel and the steering shaft can be realized due to high stability in cooperation of the rack and the gear block, and energy absorption stability of the steering column assembly is improved; in addition, the steering column assembly is free of damage retention force sections, linearity of collapse curves is higher, and collapse energy absorption effects of the steering column assembly are further improved.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to an energy-absorbing structure of a steering column assembly. Background technique [0002] In a car, the steering column assembly connecting the steering wheel and the body is one of the key components to ensure the normal driving of the car. [0003] In the prior art, the connection structure between the steering column assembly and the vehicle body is as follows: a vehicle body bracket is fixedly connected to the vehicle body, and the connection bracket of the steering column assembly is fixedly connected to the vehicle body bracket. The steering shaft of the steering column assembly (the steering shaft is a part connected with the steering wheel) can move along its axial direction relative to the connecting bracket, so as to realize the adjustment of the steering wheel in the front and rear directions. [0004] Although the above connection method can normally realize the ...

AI Technical Summary

Problems solved by technology

[0004] Although the above connection method can normally realize the installation of the steering column assembly and meet the adjustment requirements, the axial holding force of the steering shaft is provided by the friction between the connecting bracket and the body bracket, and this axial holding force is relatively small , about 1000N, when the vehicle collides and the steering wheel and steering shaft collapse, the way to offset the collapse force is relatively simple only by the axial holding force between the connecting bracket and the body bracket, and the energy absorption stability is poor , the collapse curve (the curve of the collapse force changing with the displacement when the steering column assembly collapses) is poor in consistency, so that the personal safety of the driver cannot be fully guaranteed

[0005] In addition, the different adjustment distances of the steering column assembly relative to the vehicle body will also lead to different collapse curves of the steering column assembly. When the holding force is used to counteract the collapse force, if the adjustment distance of the steering column assembly relative to the vehicle body reaches a certain value, there will be a broken holding force section on the steering column assembly, and this part will be deformed to a large extent, resulting in The collapse curve has a large degree of bending, which makes the energy absorption stability of the steering column assembly poor, and there is also the problem that the personal safety of the driver cannot be fully guaranteed

Images