JP5824983B2 - Energy absorbing front underlamp protector and vehicle equipped with the same - Google Patents

Description

The present invention, large vehicle energy absorbing front underrun protector provided at the front of a large truck or the like, and relates to a vehicle provided with this, in particular, during the entire collision, a portion of the energy absorber Energy absorption type front under-absorber, which absorbs collision energy while retreating the remaining energy absorber and bringing it into contact with the tire and absorbing the collision energy with the remaining energy absorber after this contact. run protector, and relates to a vehicle having the same.

  For collision safety measures for large vehicles such as large trucks, in addition to measures for occupant protection of large vehicles, measures for reducing the harm to vehicles of collision opponents such as passenger cars are required. In particular, in a frontal collision with a bonnet-type passenger car, the passenger car may sink under the front part of a large vehicle, and the passenger car passenger may not exhibit the inherent collision safety performance, resulting in serious injury or death to the passenger.

  As a safety measure, a front underrun protector (FUP) is attached to the front of a large vehicle, for example, the back side of a bumper, and a method of preventing the passenger vehicle from entering when a large vehicle collides with a passenger vehicle in the front is adopted. Yes. This front underrun protector is designed to reduce the damage to passengers on the passenger car side by taking advantage of the strength of the passenger car at the time of a frontal collision, thereby reducing the damage to passengers on the passenger car side. In the early days, the front underrun protector is generally tightly coupled to the chassis frame of a large vehicle. That is, the front underrun protector does not include an energy absorption (EA) mechanism, and is fixed to the rigid from the frame via the bracket.

  For example, the protector attachment reinforcing member with the member to be coupled (nut) fixed is inserted into the protector member, and the protector is simply inserted and coupled to the member to be coupled (nut). There has been proposed a front underrun protector configured so that a member can be easily fixed to a stay (see, for example, Patent Documents 1, 2, and 3).

  However, as described above, when the front underrun protector rigidly attached to the frame of the large vehicle is adopted, the vehicle size is greatly different, and as a result, the passenger car side, particularly the small vehicle, is still severely damaged.

  Therefore, if the collision detection surface of the plate is pushed during the collision of the front under-run protector, the guide pin is broken and the pair of expansion plates are expanded to expand the collision area of the protector up and down, and the shaft hole of the protector The structure which absorbs collision energy by the deformation | transformation which spreads with a guide pin is proposed (for example, refer patent document 4).

  In addition, a configuration is proposed in which the under-run protector beam and both sides of the front cross member are joined via a pair of inner crush boxes, and the vicinity of both ends of the under-run protector beam is joined via a pair of outer crash boxes and brackets. (For example, see Patent Document 5). In this configuration, at the time of a collision, either or both of the inner crash box and the outer crash box are compressed and deformed in the axial direction to absorb impact energy, thereby preventing significant deformation on the passenger car side.

  However, since this outer crash box is mounted obliquely with respect to the longitudinal direction of the vehicle body, it does not exhibit energy absorption during a full-wrap frontal collision and absorbs energy while receiving an oblique load during an offset frontal collision. There is a possibility that sufficient energy absorption effect cannot be exhibited.

  In the case of the front underrun protector 10X in which the front underrun protector bar 11 is fixed to the vehicle body (frame) 20 via the bracket 13 with the two energy absorbers 12 as shown in FIG. In the case of a low lap offset frontal collision in which a collision load is applied to one side of the front underrun protector bar 11, a low lap offset frontal collision such as the front underrun protector bar 11 being bent or the energy absorber being bent. Sometimes, there is a problem that the energy absorption performance of the energy absorber 12 cannot be sufficiently exhibited and the energy absorption performance is deteriorated.

JP 2003-72590 A JP 2003-276536 A JP 2008-230502 A JP-A-9-267706 JP 2008-230502 A

The present invention has been made in consideration of the above situation, an object of the energy absorbing front underrun protector, and, Oite the vehicle provided with this, the full-wrap frontal collision, the front underrun protector bar and the vehicle Collision energy can be efficiently absorbed by the entire energy absorber disposed between the two, and the crushing load of each energy absorber can be easily set, and energy absorption performance can be reliably ensured even in an offset frontal collision, Furthermore, it is an object of the present invention to provide an energy absorption type front underrun protector capable of preventing the bending of the front underrun protector bar and the bending of the energy absorber, and a vehicle including the same.

An energy absorbing front underrun protector for achieving the above object is the energy absorbing front underrun protector in which the front underrun protector bar is fixedly supported on the vehicle body via a plurality of energy absorbers. At least a part of the body is composed of a side energy absorber, and in the event of a frontal collision, the energy absorber is configured to start energy absorption after the side energy absorber is retracted and hits a tire. Is composed of a center side energy absorber and a side energy absorber, and the center side energy absorber is fixedly supported to the vehicle body via a bracket. The side to start the energy absorption after reversing and hitting the tire The energy absorber placed forward tire through a link mechanism and the bracket further constituting part of the linkage between the lateral energy absorbing member and the front underrun protector bar.

  According to this configuration, the collision load can be dispersed and the bending of the front underrun protector bar (FUP bar) can be suppressed. In addition, in the case of two or the like, it is possible to prevent a situation in which the energy absorber generated when an offset frontal collision or the like is bent and the energy absorbability is lowered.

  Further, the collision energy can be effectively absorbed by the first-stage collision energy absorption and the second-stage collision energy absorption by the energy absorber after contacting the tire.

  In the 0% to 100% lap frontal collision, the optimum crushing load of the energy absorber that supports the front underrun protector bar can be set easily, and the energy absorption performance is ensured in any frontal collision of any lap rate. Can be demonstrated.

Further, the collision energy can be effectively absorbed by the first-stage collision energy absorption by the center-side energy absorber and the second-stage collision energy absorption by the side energy absorber after contacting the tire. Further, the link mechanism allows the side energy absorber to recede straightly to be brought into contact with the tire without buckling the side energy absorber, and the tire can be used as a stopper of the energy absorber.

  Further, in the energy absorption type front underrun protector described above, if the link mechanism includes a support structure that restricts the vertical movement of the side energy absorber, the rear portion of the side energy absorber is attached to the tire. When abutting, the side energy absorber and the front underrun protector bar connected thereto can be prevented from being forcibly deformed downward by the rotating tire.

  In addition, a vehicle for achieving the above object includes the above energy absorption type front underrun protector.

The frontal collision energy absorption method which is a reference of the present invention is the first method in which the center of the vehicle having the energy absorption type front underrun protector is interposed between the front underrun protector bar and the vehicle body. While absorbing the collision energy with the side energy absorber, the front underrun protector bar is retracted, and the retreat causes the side energy absorber to intervene with the link mechanism between the front underrun protector bar and the vehicle body. Is brought into contact with the tire, and after the contact with the tire, the side energy absorber further absorbs the collision energy.

  According to this method, the collision energy can be effectively absorbed by the first-stage collision energy absorption and the second-stage collision energy absorption by the energy absorber after contacting the tire.

  In the 0% to 100% lap frontal collision, the optimum crushing load of the energy absorber that supports the front underrun protector bar can be set easily, and the energy absorption performance is ensured in any frontal collision of any lap rate. Can be demonstrated.

  The “collapse load” refers to the magnitude of the load when the energy absorber starts to collapse when the energy absorber receives a load, for example, starts buckling and absorbs collision energy.

According to the energy absorption type front underrun protector of the present invention and the vehicle including the same , in the 0% to 100% lap frontal collision, the entire energy absorber disposed between the front underrun protector bar and the vehicle The collision energy can be efficiently absorbed, the crushing load of each energy absorber can be easily set, and the energy absorption performance can be reliably exhibited in any frontal collision with any lap ratio. In addition, bending of the front underrun protector bar can be prevented, and bending of the energy absorber can be prevented.

It is a figure showing composition of an energy absorption type front underrun protector of an embodiment concerning the present invention. It is a figure which shows the initial state of the full wrap frontal collision in the energy absorption type front underrun protector of embodiment of this invention. It is a figure which shows the crushing or buckling state of the center side energy absorber of the 1st step of the full wrap frontal collision in the energy absorption type front underrun protector of FIG. It is a figure which shows the crushing or buckling state of the side energy absorber of the 2nd step of the full wrap frontal collision in the energy absorption type front underrun protector of FIG. It is a figure which shows the initial state of the offset frontal collision in the energy absorption type front underrun protector of embodiment of this invention. It is a figure which shows the crushing or buckling state of the center side energy absorber of the 1st step of the offset frontal collision in the energy absorption type front underrun protector of FIG. It is a figure which shows the crushing or buckling state of the side energy absorber of the 2nd step of the offset frontal collision in the energy absorption type front underrun protector of FIG. It is a figure which shows an example of a structure of the energy absorption type front underrun protector of a prior art.

Hereinafter, the energy absorbing front underrun protector of the embodiment according to the present invention, and, with the vehicle including the same will be described with reference to the drawings.

  As shown in FIG. 1, an energy absorption type front underrun protector (FUP) 10 according to the present invention includes a front underrun protector bar (FUP bar) 11, a center side energy absorber (EA body) 12A, and a side. An energy absorber (EA body) 12B, a bracket 13, and a link mechanism 14 are included. The front underrun protector bar 11 is fixedly supported on a frame (vehicle body) 20 of a large vehicle by a bracket 13 and a link mechanism 14 via a plurality of energy absorbers 12A and 12B (four in FIG. 1). The Although it does not specifically limit as this energy absorber 12, For example, although the energy absorber using steel crush boxes, foamed aluminum, etc. can be used, it is not limited to this, Another thing can also be used.

  The front end of the center side energy absorber 12A is fixedly supported behind the front underrun protector bar 11, and the rear end thereof is fixedly supported by brackets 13 provided on both sides of the front of the vehicle frame 20. Further, the front end of the side energy absorber 12B is fixedly supported behind the front underrun protector bar 11, and the rear end thereof is fixedly supported by the link mechanism 14.

  One end of the link mechanism 14 is fixed to the bracket 13 via a hinge 14a, and the other end is fixed to the side energy absorber 12B via a hinge 13b. The link mechanism 14 forms a quadrangle by a part of the front underrun protector bar 11, the center side energy absorber 12A and the side energy absorber 12B, and a part of the front underrun protector bar 11 at the time of a frontal collision. Is bent and moved rearward together with the side energy absorber 12B, the link mechanism 14 that forms this quadrangle guides the side energy absorber 12B to the tire 30, and the rear end of the side energy absorber 12B is It abuts on the tire 30.

  In other words, the link mechanism 14 allows the side energy absorber 12B to be retracted straight in the front-rear direction of the vehicle body without causing the buckling of the side energy absorber 12B to contact the tire 30, and the tire 30 can be brought into contact with the side energy absorber 12B. Can be used as a stopper.

  Further, the link mechanism 14 includes a support structure that regulates the vertical movement of the side energy absorber 12B. More specifically, a triangular structure is formed in which the hinge 14a side is open and the hinge 14b side is closed. That is, the support structure (support) 14c between the hinge 14a and the hinge 14b is V-shaped. With this configuration, when the rear portion of the side energy absorber 12B comes into contact with the tire 30, the side energy absorber 12B and the front underrun protector bar 11 connected thereto are rotating. It can be prevented from being forcedly deformed downward by 30.

The side energy absorber 12B whose rear end is fixedly supported by the link mechanism 14 becomes an energy absorber 12B that starts to absorb energy after retreating and hitting the tire 30 in a frontal collision.

  A vehicle according to the present invention includes the front underrun protector 10 described above.

  With this configuration, in a full-wrap frontal collision, the center side energy absorber 12A and the side energy absorber 12B disposed between the front underrun protector bar 11 and the vehicle frame 20 efficiently and efficiently collide energy as a whole. The crushing load of each energy absorber 12A, 12B can be easily set, and the energy absorption performance can be reliably ensured even in an offset frontal collision.

Next, the energy absorption type front underrun protector of the embodiment according to the present invention and a frontal collision energy absorption method in a vehicle including the same will be described. In the front underrun protector 10 having the above-described configuration and the vehicle including the front underrun protector 10, as shown in FIGS. The run protector bar 11 receives the load Wfull as a whole and transmits it to the respective energy absorbers 12A and 12B on both sides.

  In this case, since the center side energy absorbers 12A on both sides are rigidly fixedly supported on the vehicle frame 20 by the brackets 13 at the rear ends, the center side energy absorber 12A is crushed by receiving the load Wfull. When it receives a load exceeding the load, it buckles or collapses and retreats while absorbing collision energy due to this buckling or collapse. At this time, since the rear ends of the side energy absorbers 12 </ b> B on both sides are supported by the link mechanism 14, the side energy absorbers 12 </ b> B recede straight until they contact the tire 30 by the link mechanism 14.

  If the frontal collision energy cannot be absorbed only by the center side energy absorbers 12A on both sides of the state shown in FIGS. 1 to 2, in addition to the center side energy absorbers 12A on both sides as shown in FIG. The side energy absorbers 12B on both sides are also buckled or crushed when receiving a load exceeding the crushing load, and the buckling or crushing absorbs the collision energy.

  Then, the first-stage collision energy absorption due to buckling or crushing of the center side energy absorbers 12A on both sides and the second-stage collision energy absorption by the side energy absorbers 12B on both sides after contacting the tire 30 , Can effectively absorb the collision energy.

  As shown in FIGS. 5 to 7, in the offset frontal collision, when the load Woffset acts in the frontal collision of FIG. 5, the left side of the front underrun protector bar 11 receives the load Woffset, and each energy absorber 12 </ b> A. , 12B.

  In this case, since the load Woffset is biased to the left side, the front underrun protector bar 11 itself is deformed such that the left side moves rearward and the right side moves forward. At this time, the right center side energy absorber 12A is moved to the front underside. It becomes the rotation center of the run protector bar 11. The left central energy absorber 12A is rigidly supported on the vehicle frame 20 by a bracket 13 at the rear end, and therefore receives a load Woffset and receives a load exceeding the collapse load of the central energy absorber 12A. It buckles or collapses and retreats while absorbing the collision energy due to this buckling or collapse.

  At this time, the right-side central energy absorber 12A receives a part of the load Woffset, but its size is small, so that it holds without being buckled or crushed and maintains its shape. Further, since the rear end of the right side energy absorber 12B is supported by the link mechanism 14, the link mechanism 14 causes the front underrun protector bar 11 to move forward of the right center side energy absorber 12A. Move forward according to the deformation to. That is, the right link mechanism 14 facilitates forward deformation of the front underrun protector bar 11 and prevents the front underrun protector bar 11 from being bent.

  When the frontal collision energy cannot be absorbed only by the left central energy absorber 12A between the states of FIGS. 5 to 6, as shown in FIG. In addition to 12A, the side energy absorber 12B on the left side that has come back and contacted the tire 30 receives a load exceeding the crushing load and buckles or crushes, and absorbs the collision energy by this buckling or crushing.

  Then, the first stage of collision energy absorption by buckling or crushing of the left central side energy absorber 12A and the second stage of buckling or crushing of the left side energy absorber 12B after contacting the tire 30 are performed. The collision energy can be effectively absorbed by the collision energy absorption.

  In other words, this frontal collision energy absorption method is first interposed between the front underrun protector bar 11 and the vehicle frame 20 at the time of frontal collision of the vehicle equipped with the energy absorption type front underrun protector 10. The front under-run protector bar 11 is moved backward while absorbing the collision energy with the center side energy absorber 12A, and by this retreat, the link mechanism 14 is interposed between the front under-run protector bar 11 and the vehicle frame 20. This is a method in which the side energy absorber 12B is brought into contact with the tire 30, and the collision energy is further absorbed by the side energy absorber 12B after being brought into contact with the tire 30.

  According to the energy absorption type front underrun protector 10 having the above-described configuration, the vehicle including the same, and the front collision energy absorption method, the collision load is dispersed and the front underrun protector bar (FUP bar) 11 is bent. Can be suppressed. In addition, when two energy absorbers are used, it is possible to prevent a situation that occurs when an offset frontal collision occurs, that is, a situation where the energy absorber is bent and the energy absorbability is lowered.

  In the 0% to 100% lap frontal collision, the optimum crushing load of the energy absorbers 12A and 12B can be easily set, and the energy absorption performance can be reliably exhibited in any frontal collision of any lap rate. it can.

According to the energy absorption type front underrun protector of the present invention and a vehicle equipped with the same , an optimal crushing load of each energy absorber can be easily set in a 0% to 100% lap frontal collision, Energy absorption performance can be reliably exhibited in frontal collisions at any lap rate. Therefore, these energy absorption type front underrun protectors and vehicles equipped with them can be used for large vehicles such as large trucks and buses.

DESCRIPTION OF SYMBOLS 10 Energy absorption type front underrun protector 11 Front underrun protector bar 12A Energy absorber 12B Energy absorber (it absorbs energy after contacting a tire)
13 Bracket 14 Link mechanism 14a, 14b Hinge 20 Vehicle frame (vehicle body)
30 tires

Claims (3)

In the energy absorption type front underrun protector in which the front underrun protector bar is fixedly supported to the vehicle body via a plurality of energy absorbers, at least a part of the energy absorber is configured by a side energy absorber, In the event of a collision, the side energy absorber is configured to start energy absorption after retreating and hitting the tire ,
The energy absorber is composed of a center side energy absorber and a side energy absorber, and the center side energy absorber is fixedly supported to the vehicle body via a bracket, and the side energy is reduced during a frontal collision. The lateral energy absorber is disposed in front of the tire via a link mechanism and a bracket so that energy absorption starts after the energy absorber moves backward and hits the tire.
Further, the energy absorption type front underrun protector , wherein a part of the link mechanism is constituted by the front underrun protector bar and the side energy absorber . The energy absorption type front underrun protector according to claim 1 , wherein the link mechanism includes a support structure that regulates the vertical movement of the side energy absorber . A vehicle comprising the energy absorption type front underrun protector according to claim 1 or 2.

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