Abstract:
A structure for dispersing the collision energy of a front pillar during a car crash, may include a front impact absorption member formed in the interior of a front frame of a vehicle and configured to receive a collision energy when a car crashes into on its front side; upper and lower impact absorption members configured to disperse the collision energy of the front impact absorption member to a front pillar and a lower side of the front pillar; and an impact transition member connected to a lower side of the lower impact absorption member and connected to a front end portion of the side sill.

Description:
CROSS-REFERENCE(S) TO RELATED APPLICATIONS 
     The present application claims priority of Korean Patent Application Number 10-2012-0091206 filed Aug. 21, 2012, the entire contents of which application is incorporated herein for all purposes by this reference. 
     BACKGROUND OF INVENTION 
     1. Field of Invention 
     The present invention relates to a structure for dispersing the collision energy of a front pillar during a car crash, and in particular to a structure for dispersing the collision energy of a front pillar during a car crash which makes it possible to minimize the hurts of a driver and a passenger in such a way to effectively disperse a collision energy transferred to a front pillar when a car crashes into on its front side. 
     2. Description of Related Art 
     When an impact is transferred to a front side of a vehicle, the impact is directly transferred to the side of a driver if a front pillar and a crash pad don&#39;t effectively absorb the impacts. 
     In particular, the collision energy is directly transferred to a fender apron without passing through a front side member which is an impact absorption structure and to the lower side of a front pillar, so the crash pad is pushed back a lot, thus causing an opening part of a door to deform. When the opening part of the door deforms a lot, the upper sides of a side sill and a front pillar might be bent, so a driver and a passenger could be severely hurt. 
     The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. 
     SUMMARY OF INVENTION 
     Accordingly, the present invention is made to resolve the problems encountered in the conventional art. Various aspects of the present invention provide for a structure for dispersing the collision energy of a front pillar during a car crash which makes it possible to minimize a collision energy which is directly transferred to a front pillar of a vehicle. 
     Various aspects of the present invention provide for a structure for dispersing the collision energy of a front pillar during a car crash, comprising a front impact absorption member formed in the interior of a front frame of a vehicle and configured to receive a collision energy when a car crashes into on its front side; upper and lower impact absorption members configured to disperse the collision energy of the front impact absorption member to a front pillar and a lower side of the front pillar; and an impact transition member connected to a lower side of the lower impact absorption member and connected to a front end portion of the side sill. 
     In addition, the front impact absorption member and the lower impact absorption member respectively have a bent surface of which both sides are bent about one surface and are engaged in such a way that any one of the pairs of the bent surfaces of the front impact absorption member and the lower impact absorption member surface-contacts. 
     In addition, the front impact absorption member is formed in a trapezoid shape of which the height gradually increases in the direction from the front end portion to the rear end portion. 
     One end portion of the upper impact absorption member is connected to a front pillar and the other end portion of it is connected to one end portion of the lower impact absorption member. 
     The lower impact absorption member is prolonged in a vertical direction with respect to the ground, and the impact transition member is connected to a lower end portion of the lower impact absorption member. 
     The side sill is prolonged and formed in the forward and backward directions so as to support the lower inner side of the vehicle door, and the impact transition member is connected to a front end portion of the side sill. 
     To a rear end portion of the impact transition member is connected a side sill impact absorption member disposed in the inner side of the side sill. 
     According to a structure for dispersing the collision energy of a front pillar during a car crashes of the present invention, it is possible to prevent an external force from being intensively transferred to the doors of a vehicle by effectively dispersing the collision energy in the directions of the upper side and the lower side of a front pillar, the collision energy being generally transferred from a fender apron when a vehicle crashes into on its front side. Therefore, the injuries of the driver and the passenger can be minimized. 
     The present methods and apparatuses have other features and advantages apparent from the accompanying drawings, incorporated herein, and below Detailed Description, which together serve to explain certain principles of the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a cross sectional view illustrating an exemplary structure for dispersing the collision energy of a front pillar during a car crash according to the present invention. 
         FIG. 2  is a cross sectional view taken along the line A-A of  FIG. 1 . 
         FIG. 3  is a cross sectional view taken along the line C-C of  FIG. 1 . 
         FIG. 4  is a cross sectional view taken along the line B-B of  FIG. 1 . 
         FIG. 5  is a cross sectional view taken along the line D-D of  FIG. 1 . 
         FIG. 6  is a perspective view illustrating a connection part between a lower side impact absorption member and an impact transition member of  FIG. 1 . 
         FIG. 7  is a cross sectional view taken along the line E-E of  FIG. 1 . 
         FIG. 8  is a cross sectional view taken along the line F-F of  FIG. 1 . 
         FIG. 9  is a view illustrating the inner side of a side sill of  FIG. 1 . 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is/are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims. 
       FIG. 1  is a cross sectional view illustrating a structure for dispersing the collision energy of a front pillar during a car crash according to an embodiment of the present invention. As shown in  FIG. 1 , the structure for dispersing the collision energy of a front pillar during a car crash according to an embodiment of the present invention includes a front impact absorption member  400  disposed in the interior of a body front frame  100  at the side of a fender apron to which is connected a front end portion of a front pillar  200  of a vehicle, a lower impact absorption member  410  connected to a rear end portion of the front impact absorption member  400 , an upper impact absorption member  420  connected to an upper side of the lower impact absorption member  410 , an impact transition member  430  connected to a lower side of the lower impact absorption member  410 , and a side sill impact absorption member  440  connected to a rear end portion of the impact transition member  430 . Here, the body front frame  100  means a frame forming a cowl or a fender apron disposed at a front side of a vehicle. The front impact absorption member  400  is provided in the interior of the body front frame  100  for thereby first absorbing the collision energy transferred from the front side. 
       FIG. 2  is a cross sectional view taken along the line A-A of  FIG. 1 . As shown in  FIG. 2 , the front impact absorption member  400  is disposed with its one side surface contacting with the body front frame  100  so as to more effectively absorb the collision energy. It may be disposed in a shape forming a bent surface  401  of which both sides are bent about one side surface. In addition, the front impact absorption member  400  is formed with its height gradually increasing in the direction from its front end portion to the rear end portion, so the collision energy transferred during the car crash can be reliably transferred to the lower impact absorption member  410 . 
       FIG. 3  is a cross sectional view taken along the line C-C of  FIG. 1 . As shown in  FIG. 3 , the front impact absorption member  400  and the lower impact absorption member  410  respectively define the bent surface  411  of which both side surfaces are bent about one surface. Any one bent surface  401  of the front impact absorption member  400  surface-contacts with any one bent surface  411  of the lower impact absorption member  410 , so the collision energy transferred from the front impact absorption member  400  can be stably transferred. 
       FIG. 4  is a cross sectional view taken along the line B-B of  FIG. 1 . As shown  FIG. 4 , the upper impact absorption member  420  is arranged along the longitudinal direction of the inner side of the inner frame of the front pillar  200 . In addition, the upper impact absorption member  420  defines the bent surface  421  of which both sides are bent about one surface. 
       FIG. 5  is a cross sectional view taken along the line D-D of  FIG. 1 . As shown in  FIG. 5 , the lower impact absorption member  410  is prolonged in an upright shape from the ground, and a bent surface  411  of which both sides are bent about one surface of the lower impact absorption member  410  is formed so that it can surface-contact with the body front frame  200  prolonged from the front side of the vehicle door. 
       FIG. 6  is a perspective view illustrating a connection part between a lower side impact absorption member and an impact transition member of  FIG. 1 .  FIG. 7  is a cross sectional view taken along the line E-E of  FIG. 1 . As shown in  FIGS. 6 and 7 , at a lower side of the lower impact absorption member  410  is formed an engaging surface  412  for an engagement with the upper side of the impact transition member  430 . The impact transition member  430  has a bent surface  411  of which both sides are bent about one surface, one side in the bent surface  411  surface-contacts with the engaging surface  412 . In other words, the collision energy transferred to the lower impact absorption member  410  is transferred to the side sill impact absorption member  440 . At this time, the engaging surface  412  and the flange  432  can be engaged by a welding method or a bolting method. 
       FIG. 8  is a cross sectional view taken along the line F-F of  FIG. 1 , and  FIG. 9  is a view illustrating the inner side of the side sill of  FIG. 1 . As shown in  FIGS. 8 and 9 , the side sill impact absorption member  440  is arranged in the inner side of the side sill  300  which supports the lower side of the vehicle door in the forward and backward directions. In addition, the cross section of the side sill impact absorption member  440  looks like a bent portion  441  and a vertical surface  442  are continuously formed so that the step shapes are formed in the widthwise direction along the longitudinal direction. 
     According to the structure for dispersing the collision energy of a front pillar during a car crash according to an embodiment of the present invention, the collision energy occurring due to the front side collision is dispersed and absorbed by means of the front impact absorption member  400 , the upper impact absorption member  420 , the lower impact absorption member  410 , the impact transition member  430  and the side sill impact absorption member  440  after it directly hits the front apron, which is relatively wider, without passing through the front side member even in case of the front side collision of the vehicle or the 25% offset front side collision which is more severe condition than the conventional 40% offset front side collision. Therefore, it is possible to inhibit the over deformation of the vehicle door, and as the deformations of the dash board of the vehicle or the opening part of the vehicle door can be minimized, the deformations of the passenger&#39;s rooms of the vehicle can be accordingly reduced, thus minimizing the hurts of the passenger. 
     For convenience in explanation and accurate definition in the appended claims, the terms upper or lower, front or rear, and etc. are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures. 
     The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the Claims appended hereto and their equivalents.