Energy-absorbing steering tubular column

Abstract

The invention discloses an energy-absorbing steering tubular column, which belongs to the field of automobiles. The steering tubular column comprises an upper column tube, a lower column tube, an upper steering shaft, a lower steering shaft, an upper mounting bracket, a lower mounting bracket and a damping device. Through the damping device, energy is absorbed by secondary crumpling of the steering tubular column to reduce collision peak force; when secondary collision takes place, an upper steering shaft assembly and a lower steering shaft assembly slide relative to each other, and the air in the lower steering shaft is compressed and overflowed out of constant flow holes in an upper damping ring and a lower damping ring, so energy is effectively absorbed in the entire crumpling process,the time for acting collision force on a human body is prolonged, and the safety of a driver is protected.

Description

technical field [0001] The invention belongs to the field of automobiles, in particular to an energy-absorbing steering column. Background technique [0002] The steering column is an important part of the steering mechanism of the automobile steering system. It works with other mechanisms to change or restore the driving direction of the car. [0003] As consumers have higher requirements for car collision safety, OEMs have higher and higher requirements for passive safety technology in car design. Based on the need to protect drivers in collisions, energy-absorbing steering columns are generally used at present. In order to ensure that when the steering column is compressed in a collision, the backward displacement of the steering wheel shall not exceed 127mm, and at the same time ensure that the collision force of the steering wheel on the driver's chest does not exceed 11123N in the second collision. [0004] Such as Image 6 As shown, the energy-absorbing steering colu...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the limited energy consumed by the energy-absorbing steering column structure in the prior art, it is impossible to ensure the secondary collapse of the steering column tube to absorb energy, so that most of the impact energy is absorbed by the driver itself, resulting in no damage to the driver's body. For the problem of good protection, the embodiment of the present invention provides an energy-absorbing steering column, which can effectively absorb energy, prolong the time when the collision force acts on the human body, and protect the safety of the driver

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