Vehicle safety belt braid

A technology for seat belts and vehicles, which is applied in the field of vehicle seat belt webbing, which can solve the problems of reducing the overall protection effect of seat belt devices, excessive compression of occupant's chest and abdomen, and reduction of webbing area, so as to avoid damage to ribs and internal organs, The effect of reducing extrusion and facilitating production

Inactive Publication Date: 2012-10-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after this universal safety belt webbing is locked, under the action of a large impact acceleration of the human body, it will produce transverse narrowing and deformation due to longitudinal stretching, so that the area of ​​the webbing that acts on the chest and abdomen of the human body is reduced.
When the collision acceleration of the car is high and the impact pressure of the occupant on the webbing is high, the reduction of the are

Method used

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  • Vehicle safety belt braid
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Embodiment Construction

[0026] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] The negative Poisson's ratio characteristic of the safety belt webbing of the present invention is mainly realized by the auxetic effect of the accumulative auxetic unit 1 . Poisson's ratio (Poisson's ratio) μ is defined as the ratio of the transverse strain to the longitudinal strain when the material is subjected to longitudinal tension or compression, namely:

[0028] μ = - ϵ y ϵ x - - - ( 1 )

[0029] Among them, ε y is the transverse strain of the material, ε x is the longitudinal strain of the material. The so-called negative Poisson's ratio characteristic, that is, the range of Poisson's ratio μ is -1~0. When a negat...

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Abstract

The invention discloses a vehicle safety belt braid which is formed by M*N pull expansion units jointed with one another and shown as a continuous belt structure with orthorhombic convexes as a whole, wherein M represents the number of the rows of the pull expansion units included in the braid and N represents the number of the pull expansion units included in a complete row of the braid. The shape of the pull expansion unit is a continuous curved surface with orthorhombic convexes, including four orthorhombic convexes and four subtriangular transitional curved surfaces. When a vehicle has a crash, the braid is impacted by the upper trunk of the human body having acceleration and thereby being stretched longitudinally; and the braid is expanded and deformed transversely due to negative-Poisson ratio pull expansion characteristic, so that the contact area of the braid with the human body is increased. Under the same impact force, the area of force bearing is increased so that pressure on the chest and the stomach of the human body is accordingly reduced; in the way, squeezing to the trunk of a passenger is reduced and damage on the ribs and the viscera is avoided; and secondary harm on the passenger is avoided.

Description

technical field [0001] The invention relates to a vehicle safety belt, in particular to a vehicle safety belt webbing. Background technique [0002] At present, passenger cars widely use three-point seat belts to protect occupants. When the car collides, the occupant is "bound" on the seat through the locked seat belt webbing, limiting the forward movement of the occupant, so as to avoid the occupant's secondary collision with the interior of the car or being thrown out of the car. As the main occupant restraint protection device, the seat belt is currently the most effective automotive passive safety device, which has excellent effects in reducing the number of traffic accident deaths and reducing the degree of occupant injury. [0003] Existing car seat belt webbing is mainly made of nylon or polyester fiber material, with smooth surface, high strength, extensibility and good energy absorption characteristics. However, after the universal safety belt webbing is locked, u...

Claims

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Application Information

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IPC IPC(8): B60R22/12D03D17/00
Inventor 亓昌杨姝安文姿王栋
Owner DALIAN UNIV OF TECH
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