Negative poisson's ratio structure steering tubular column and designing method for same

Abstract

The invention discloses a negative poisson's ratio structure steering tubular column and a designing method for the same. The negative poisson's ratio structure steering tubular column comprises an upper tubular column housing, a lower tubular column housing, inner cores, a steering tubular column installation rack, a steering tubular column upper rack and a steering tubular column lower rack, wherein the lower tubular column housing is connected with the upper tubular column housing; a negative poisson's ratio structure is filled with inner core; the upper and lower tubular column housings are also filled with the inner cores; the steering tubular column installation rack can be fixed on a vehicle body; the steering tubular column upper rack is arranged between the upper tubular column housing and the steering tubular column installation rack to carry the upper tubular column housing; and the steering tubular lower rack is arranged between the lower tubular column housing and the steering tubular column installation rack to carry the lower tubular column housing. Deficiencies of limited energy absorption during automobile crash, complicate deformation energy-absorbing mechanism, low structural reliability and high cost of the steering tubular column can be overcome by the use of the negative poisson's ratio structure steering tubular column.

Description

technical field [0001] The invention relates to the technical field of automobile steering systems, in particular to a steering column with a negative Poisson's ratio structure and a design method thereof. Background technique [0002] When a car has a frontal collision, the steering system including the steering column and the steering wheel at the front of the car will move backwards, that is, the direction of the driver, and the driver will move forward due to the influence of inertia, so the driver can easily Injury by the steering wheel, the impact of the steering wheel on the chest and abdomen of the driver is a very common type of injury in car frontal collision traffic accidents. During the collision contact process, the steering column needs to absorb energy to prevent the driver from being injured by the collision force beyond the human body's ability to bear. [0003] In the traditional steering column structure, the steering wheel moves upward and rear during th...

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Problems solved by technology

[0004] In order to solve the above problems, the object of the present invention is to propose a steering column with a negative Poisson's ratio structure and its design optimization method, which can overcome the limited energy absorbed by the steering column in the process of automobile collision in the prior art, and the deformation of the energy-absorbing mechanism. Complexity, reduced structural reliability and high cost

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