JP2018058532A - Impact absorption structure of vehicle front part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize an adverse influence to a body skeleton of a vehicle front part when absorbing a collision load to the front part by a low-speed collision, and to secure an existing space of fog lamps mounted to a lower part of a front bumper cover, a grill shutter or the like.SOLUTION: An impact absorption structure of a vehicle front part comprises: a pair of left and right first front side members 1; a radiator support 2 which is connected between the first front side members; a front cross member 4 extending to a vehicle width direction at a lower part of a front bumper cover 3; and a second front side member 5 which is connected between the lower part of the radiator support and the front cross member. In the front cross member, a fragile part 41 is arranged at an upper face part 4U, and in the second front side member, upper-side fragile parts 51, 52 are arranged at an upper face part 5U in a vehicle fore-and-aft direction, and lower-side fragile parts 53, 54 are arranged in a position which substantially opposes lower parts of the upper-side fragile parts of a lower face part 5L.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shock absorbing structure in a front part of a vehicle, and more particularly to a shock absorbing structure in a front part of a vehicle that can be crushed and deformed during a frontal collision of the vehicle to absorb the shock.

  2. Description of the Related Art Conventionally, there has been disclosed an impact absorbing structure in a front portion of a vehicle that can be crushed and deformed during a frontal collision of the vehicle to absorb the impact (see, for example, Patent Document 1 and Patent Document 2).

  The shock absorbing structure for a vehicle disclosed in Patent Document 1 is provided with a bumper provided at the front end of the vehicle, side members provided on both left and right sides of the vehicle, and provided on the rear side of the bumper. A cross member that is horizontally mounted between the members, a first crash box that is disposed between the bumper and the cross member, is connected to the cross member, and is spaced from the bumper, and between the bumper and the cross member And a second crash box connected to each other.

  According to the shock absorbing structure configured in this manner, at the initial stage of the frontal collision of the vehicle, the second crush box can be deformed in a bellows shape to absorb the shock, and receive a stronger shock. In this case, after the bumper moves by the predetermined interval, the first crush box can be deformed in a bellows shape to absorb the impact.

  In addition, the shock absorbing structure in the front portion of the vehicle to which the vehicle body energy absorbing member disclosed in Patent Document 2 is applied includes a bumper provided at the front end of the vehicle, and side members provided on the left and right sides of the vehicle. And an energy absorbing member connected between the bumper and each side member cross member.

  According to the shock absorbing structure configured as described above, the energy absorbing member can be deformed in a bellows shape and absorb the shock at the time of a frontal collision of the vehicle.

Japanese Patent Application Laid-Open No. 2004-338883 Japanese Patent No. 4133302

  However, in each of the shock absorbing structures described in the background art, the first crash box, the second crash box, and the energy absorbing member have their load directions with respect to the shock load generated in the vehicle front-rear direction at the time of a frontal collision of the vehicle. Therefore, the bumper starts moving backward toward the rear of the vehicle as soon as a frontal collision occurs.

  Therefore, in order to absorb the impact load from the front of the vehicle due to low-speed frontal collision of the vehicle at the lower part of the front bumper cover, if a crash box or energy absorbing member that collapses in a bellows shape in the load direction is provided, The body skeleton of the front part of the vehicle, which is related to the crash box and energy absorbing member, is deformed, and the parts mounted on the vehicle such as fog lamps mounted on the lower part of the front bumper cover and grill shutters arranged on the front side of the radiator support There was a difficulty that could not secure the living space.

  The present invention has been made to solve such a conventional problem, and in the lower part of the front bumper cover, in order to absorb the impact load from the front of the vehicle due to the low-speed frontal collision of the vehicle, Provides a shock absorbing structure at the front of the vehicle that minimizes the negative effects of the vehicle and secures a living space for components mounted on the vehicle, such as fog lamps mounted on the lower part of the front bumper cover and grill shutter disposed on the front side of the radiator support The purpose is to do.

The shock absorbing structure in the vehicle front portion according to the first aspect of the present invention that achieves the above-described object includes a pair of left and right first front side members disposed in the vehicle front portion along the vehicle front-rear direction, A radiator support coupled between the pair of left and right first front side members; a front cross member having a substantially rectangular annular cross-sectional shape extending in the vehicle width direction at a front end of the vehicle at a lower portion of the front bumper cover; and a radiator And a second front side member having an annular closed cross section connected between a lower portion of the support and the front cross member.
In this specification, “arrangement” means provision at each position. Further, “extended” means being in an extended state.

  The front cross member is provided with a weak body portion on the upper surface portion, and the second front side member is provided with upper weak body portions on the front and rear sides of the upper surface portion in the vehicle front-rear direction, and each of the upper weak body portions on the lower surface portion. A lower weak body portion is provided at a substantially opposite position below.

  In the shock absorbing structure in the front portion of the vehicle according to the first aspect as described above, since the weak body portion is provided on the upper surface portion of the front cross member, an impact load due to a low speed frontal collision of the vehicle is applied to the lower portion of the front bumper cover. The second front side member is firstly compressed and deformed by the front lower weak body portion, and the second lower side weak body second rear side member is transmitted to the lower surface portion of the front cross member. Part is compressively deformed, the third rear upper weak body part is tensile deformed, the fourth front upper weak part is compressively deformed, and the fifth rear lower weak part is compressively deformed again. The rear upper weak body part is subjected to tensile deformation.

  Therefore, the impact load due to the low-speed frontal collision of the vehicle is absorbed by moving the front cross member and the second front side member to the lower rear side. Compared to crash boxes and energy absorbing members that are crushed and deformed, the fog on the front of the front bumper cover and the grille located on the front side of the radiator support are minimized and the adverse effect on the body frame of the front part of the vehicle is minimized. A living space for vehicle-mounted components such as a shutter can be secured.

  According to a second aspect of the present invention, in the shock absorbing structure in the vehicle front portion according to the first aspect, the rigidity of the front cross member and the second front side member in the vehicle front-rear direction is weaker portion <upper front side. The weak body portion and the lower weak body portion <the rear upper weak body portion and the lower weak body portion <the lower surface portion of the front cross member <the front end of the second front side member, and the front upper weak body portion and the lower weak body portion. The body portion located between the front body weaker portion and the lower weak body portion on the front side of the second front side member and the body portion located between the upper weak body portion and the lower weak body portion on the rear side are strengthened in this order. Is set to.

  The shock absorbing structure in the front portion of the vehicle according to the second aspect is configured such that the rigidity of the front cross member and the second front side member in the vehicle front-rear direction is set in this manner, so that the front upper weak body is set. There is no problem even if the positions of the upper and lower weak body parts and the positions of the rear upper weak body part and the lower weak body part are slightly deviated in the longitudinal direction of the vehicle, so the processing accuracy of these weak body parts is lowered. be able to. Thereby, the processing cost of the 2nd front side member can be lowered.

  According to a third aspect of the present invention, in the shock absorbing structure in the vehicle front portion according to the first aspect or the second aspect, the weak body portion is provided in the vicinity of the joining position of the second front side member. .

  According to the shock absorbing structure in the vehicle front portion according to the third aspect as described above, when the second front side members are disposed at both ends in the vehicle width direction below the radiator support, the second front side members It is possible to prevent a decrease in strength in a portion other than the weak body portion.

  According to a fourth aspect of the present invention, in the shock absorbing structure in the front portion of the vehicle according to any one of the first to third aspects, the weak body portion of the front cross member is a cut-out portion.

  According to such a fourth aspect of the shock absorbing structure in the front portion of the vehicle, it is possible to transmit the impact load only to the lower surface portion without transmitting the impact load to the upper surface portion of the front cross member. .

  According to a fifth aspect of the present invention, in the shock absorbing structure in the vehicle front portion according to any one of the first to fourth aspects, the upper weak body portion and the lower weak body portion of the second front side member Are respectively the site | part provided with the bending bead, or the site | part provided with the hole. According to the shock absorbing structure in the front portion of the vehicle that is the fifth aspect as described above, since the space can be provided in the weak body portion, it is easily deformed.

  According to the shock absorbing structure in the front part of the vehicle of the present invention, in the lower part of the front bumper cover, when the impact load from the front of the vehicle due to the low speed frontal collision of the vehicle is absorbed, the adverse effect on the body skeleton of the front part of the vehicle is minimized. In addition, it is possible to secure a living space for vehicle-mounted components such as fog lamps mounted on the lower part of the front bumper cover and grill shutters disposed on the front side of the radiator support.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows preferable embodiment in the impact-absorbing structure in the vehicle front part of this invention, (A) is schematic explanatory drawing which looked at the positional relationship of each member from the side, (B) is a front cross member and 2nd front. It is the detailed explanatory view which looked at the side member from the side. It is a perspective view which shows the specific example of a 2nd front side member. (A)-(H) is a stress contour figure which shows the deformation | transformation mode of the front cross member and 2nd front side member in the impact-absorbing structure in the vehicle front part of this invention.

  Hereinafter, the example for implementing the impact-absorbing structure in the vehicle front part of this invention is demonstrated. As shown in FIG. 1A, the shock absorbing structure in the vehicle front portion of the present invention includes a pair of left and right first front side members 1, 1 disposed in the vehicle front portion along the vehicle front-rear direction. A radiator support 2 connected between the pair of left and right first front side members 1 and 1 and a substantially rectangular annular closed cross-sectional shape extending in the vehicle width direction at the front end of the vehicle at the lower part of the front bumper cover 3. A front cross member 4 and a second front side member 5 having an annular closed cross section connected between a lower portion of the radiator support 2 and the front cross member 4 are provided.

  These members are provided on the back surface of the front bumper cover 3 and the front grille 6 covering the front of the engine room provided at the front of the vehicle, and the front grille 6 is disposed immediately above the front bumper cover 3.

  Although FIG. 1A shows one side in the vehicle width direction of the vehicle, the other side is also bilaterally symmetrical and identical, so that the left and right pair of parts are denoted by the same reference numerals, thereby providing the other side of the vehicle. The description about is omitted as appropriate.

  The pair of left and right first front side members 1 and 1 have bases 1a and 1a coupled to the lower surface of the passenger compartment floor (not shown) along the same, and extend from the front end of the passenger compartment floor to the engine compartment side. The extending portions 1b and 1b are formed so that their rear ends reach the base portions 1a and 1a via the inclined portions 1c and 1c. Accordingly, the extending portions 1b and 1b are positioned one step higher than the passenger compartment floor.

  Further, a front suspension cross member 7 is constructed in the vehicle width direction on the lower surfaces of the base end portions 1a, 1a of the pair of left and right first front side members 1, 1. Here, “erection” means that it is provided. A reinforcing side member 8 is connected between the front side of the front suspension cross member 7 and the rear side of the lower portion of the radiator support 2.

  The pair of left and right first front side members 1 and 1 are connected to both sides on the vehicle rear side of a front bumper reinforcement 9 that extends in the vehicle width direction at the front end of the vehicle and functions as a bumper. ing. A first shock absorbing absorber 10 is fixed on the front side of the front bumper reinforcement 9 along the vehicle width direction.

  The radiator support 2 is disposed in the engine room ER, and a radiator (not shown) for cooling the engine is attached to the radiator support 2. The radiator support 2 is disposed on a lower side of the radiator on the front side of the vehicle, and travels to the radiator. A grill shutter 11 is attached to control the air volume.

  The radiator support 2 includes a pair of upper and lower horizontal frames 21 and 22 that extend in the vehicle width direction and are spaced apart from each other in the vehicle vertical direction, and end portions of the pair of upper and lower horizontal frames 21 and 22 in the vehicle width direction. And a pair of left and right vertical frames 23, 23 for connecting the two in the vertical direction of the vehicle.

  As shown in FIG. 1B, the front cross member 4 is provided with a weak body portion 41 on the upper surface portion 4U. The weak body portion 41 is provided, for example, in the vicinity of the joining position of the second front side member 5. Here, in the present specification and the appended claims, the position where the second front side member 5 is provided is expressed as “near the joining position” because the second front side member 5 is joined. This is because the action described later does not change even if it is slightly larger than the bonding area of the position. Moreover, as such a weak body part 41, the site | part cut out in the front cross member 4 corresponds, for example. A second shock absorbing absorber 12 is fixed on the front side of the front cross member 4 along the vehicle width direction.

  As shown in FIG. 1 (B), the second front side member 5 is provided with upper weak parts 51, 52 on the front and rear sides of the upper surface part 5U in the longitudinal direction of the vehicle, respectively, and the upper weak body parts 51 of the lower surface part 5L, Lower weak body portions 53 and 54 are provided at substantially opposite positions below 52. The upper weak body portions 51 and 52 and the lower weak body portions 53 and 54 are formed so as to be deformed along a direction orthogonal to the axis L1 of the second front side member 5.

  Further, as the front upper weak body portion 51, the rear upper weak body portion 52, the front lower weak body portion 53, and the rear lower weak body portion 54, for example, the body portion 50 of the second front side member 5 is used. This corresponds to a part where a bent bead or a hole is provided. The folded bead is formed in a concave shape.

  Further, as shown in FIG. 2, for example, the second front side member 5 includes a cylindrical body 50 whose front side is closed, and a lower part of the radiator support 2 joined to the rear side of the body 50. It is comprised from the rectangular-shaped flange part 55 for connecting. As the upper weak body parts 51 and 52 and the lower weak body parts 53 and 54 of the second front side member 5, bent beads are employed, but holes are formed in the bottom part. This is formed in this way for convenience of processing, but there is no problem in functioning as a weak body part. Here, “drilling” means making a hole.

  In addition, although the direction is shown with the arrow in FIG. 2, this has shown the direction seen from the passenger | crew who seated in the driver's seat. Arrow UP indicates the vehicle upward direction, arrow FR indicates the vehicle front direction, and arrow RH indicates the vehicle left direction. Furthermore, each arrow has shown the directionality when the 2nd front side member 5 is integrated in the engine room ER.

  Note that the cross-sectional shape of the second front side member 5 is not limited to a circular tube shape, and may be a hollow material such as a rectangular shape, a polygonal shape, or an elliptical shape, and any shape can be used as long as it can be deformed as described later. But you can.

  For example, the second front side member 5 is disposed on both end sides in the vehicle width direction of the horizontal frame 23 positioned below the radiator support 2. Further, the second front side member 5 is formed so that the front cross member 4 and the part connected to each other are in contact with each other.

  As shown in FIG. 1 (A), the shock absorbing structure in the vehicle front portion of the present invention configured as described above has a deformation region DR1 when absorbing shock at the time of a low-speed collision as a front end of the second front side member 5. The deformation region DR2 is set near 5F, and is set slightly rearward of the center position of the front body FB in the front-rear direction of the vehicle when absorbing a shock during a high-speed collision.

  When the deformation region DR2 at the time of high-speed collision is set as described above, generally between the pair of left and right first front side members 1 and 1 and the front bumper reinforcement 9. Is connected to a crush box or the like (not shown) that is deformed in a bellows shape.

  It should be noted that the shock absorbing structure in the front portion of the vehicle does not necessarily have such a structure other than the front cross member 4 and the second front side member 5, and the deformation when absorbing the shock during high-speed collision is not necessarily required. Any structure may be used as long as the region DR2 can be set slightly behind the center position of the front body FB in the longitudinal direction of the vehicle.

  Hereinafter, the operation at the time of the front low speed collision of the vehicle having the vehicle front portion to which the shock absorbing structure of the present invention is applied will be described with reference to FIGS.

  When an impact load due to a low-speed frontal collision of a vehicle having a vehicle front portion to which the shock absorbing structure of the present invention is applied is applied to the lower portion of the front bumper cover 3, as shown in FIG. The shock load is configured to be transmitted over the entire height direction via the second shock absorbing absorber 12 (see FIG. 1A), but the weak body portion 41 is provided on the upper surface portion 4U. Therefore, while the weak body portion 41 is crushed, the impact load is mainly transmitted to the lower surface portion 4L. That is, as shown in FIG. 3 (B), the front cross member 4 has a substantially rectangular annular cross-sectional shape, so that the front end 4a of the lower surface portion 4L remains until the weak body portion 41 is completely crushed by the impact load. Since it moves to the weak body portion 41 side, the impact load transmitted to the front end 4a of the lower surface portion 4L is transmitted to the second front side member 5 via the rear end 4b of the lower surface portion 4L of the front cross member 4. Is transmitted to the front end 5a of the lower surface portion 5L.

  As shown in FIG. 3C, the front lower end 5a of the second front side member 5 is compressed and deformed by the impact load, so that the front end 5a of the lower surface portion 5L moves to the lower rear side. The front end 5b of the upper surface portion 5U on the same cross section also moves to the lower rear side. At this time, since the front cross member 4 also moves downward and rearward together with the front end 5F of the second front side member 5, the axial force AF caused by the impact load from the lower surface portion 4L of the front cross member 4 is The lower weak body portion 54 on the rear side of the front side member 5 is offset downward by a length H1 with respect to the deformation reference position at the time of compressive deformation.

  When the axial force AF due to the impact load from the lower surface portion 4L of the front cross member 4 is offset downward, the second front side member 5 is subjected to the impact load on the lower weak body portion 54 on the rear side. Therefore, the lower weak body portion 54 on the rear side starts compressive deformation. Here, since the rear end 5R of the second front side member 5 is fixed to the lower portion of the radiator support 2, a rotational moment M1 is generated in the rear lower weak body portion 54 together with this compression deformation. become. As a result, as shown in FIG. 3D, in the second front side member 5, since the tensile deformation occurs in the rear upper weak body portion 52, the entire front end 5F further moves downward and rearward.

  In this way, the entire front end 5F of the second front side member 5 is further moved downward and rearward, and the weak body portion 41 of the front cross member 4 continues to be compressed and deformed, so that the cross section of the front cross member 4 is completely crushed. 3E, the front end 4a of the lower surface 4L of the front cross member 4, the front end 5b of the upper surface 5U of the second front side member 5, and the second front side, as shown in FIG. The deformation reference position when the lower weak body portion 54 on the rear side of the member 5 undergoes compression deformation is the same height position. At this time, the impact load is applied to the front end 5b of the upper surface portion 5U of the second front side member 5 via the front end 4a of the lower surface portion 4L of the front cross member 4, so that the axial force AF due to the impact load is applied. Has no offset relative to the deformation reference position when the lower weak body portion 54 on the rear side of the second front side member 5 is compressed and deformed. As a result, the rotational moment M1 generated in the lower weak body portion 54 on the rear side of the second front side member 5 disappears.

  Here, when an impact load is further applied to the front end 5b of the upper surface portion 5U of the second front side member 5 via the front end 4a of the lower surface portion 4L of the front cross member 4, as shown in FIG. In addition, since the front upper weak body portion 51 of the second front side member 5 is compressed and deformed, the front upper weak body portion 51 of the second front side member 5 moves downward. When the front weak body 51 on the front side of the second front side member 5 moves downward, as shown in FIG. 3G, the axial force AF due to the impact load from the front end 4a of the lower surface portion 4L of the front cross member 4 is obtained. Is offset downward by the length H 2, so that the rotational moment M 2 is generated again in the lower weak body portion 54 on the rear side of the second front side member 5. Accordingly, the second front side member 5 continues to move to the lower rear side.

  If this state continues, as shown in FIG. 3 (H), the second front side member 5 eventually develops the tensile deformation of the lower weak body portion 53 along with the compression deformation of the upper weak body portion 51 on the front side. The cross-section of the lower weak body portion 54 progresses along with the tensile deformation of the upper weak body portion 52 on the rear side, and the cross-section collapses.

  Thus, the impact load caused by the low-speed frontal collision of the vehicle is absorbed by moving the front cross member 4 and the second front side member 5 to the lower rear side. Compared to a crash box or energy absorbing member that collapses in a bellows shape in the direction, the adverse effect on the body skeleton at the front of the vehicle is minimized, and the fog lamp 13 mounted on the lower part of the front bumper cover 3 and the radiator support 2 A living space for vehicle-mounted components such as the grill shutter 11 disposed on the front side can be secured.

  Accordingly, the second front side member 5 is such that the front upper weak part 51 and the lower weak part 53 and the rear upper weak part 52 and the lower weak part 54 are separated from each other in the vehicle front-rear direction. The living space of the mounted parts can be increased.

  As described above, the second front side member 5 is compressed and deformed first in the front lower weakened portion 53, second in the lower weakened portion 54 in the rear, and third in the rear. The upper upper weak body portion 52 is pulled and deformed, the fourth upper upper weak body portion 51 is compressed and deformed, the fifth lower rear weak portion 54 is compressed and deformed again, and the rear upper weak portion 52 is rearranged. In order to tensilely deform the front cross member 4, the rigidity of the front cross member 4 and the second front side member 5 may be changed for each part.

  That is, the rigidity of the front cross member 4 and the second front side member 5 in the vehicle front-rear direction is such that the weak portion 41 <the front upper weak portion 51 and the lower weak portion 53 as shown in FIG. <Rear upper weak body portion 52 and lower weak body portion 54 <Lower surface portion 4L of front cross member 4 <Front front end 5F of second front side member 5, Front upper weak body portion 51 and lower weak body portion 53 Is located between the front weak body portion 51 and the lower weak body portion 53 on the front side of the second front side member 5, and the upper weak body portion 52 and the lower weak body portion 54 on the rear side. It is good to set so that it may become strong in order of trunk part 50b.

  By setting the strength of the front cross member 4 and the second front side member 5 in the vehicle front-rear direction in this way, the positions of the front upper weak part 51 and the lower weak part 53, and the rear Since there is no problem even if the positions of the upper weak body part 52 and the lower weak body part 54 are slightly shifted in the vehicle front-rear direction, the processing accuracy of these weak body parts can be lowered. Thereby, the processing cost of the 2nd front side member 5 can be lowered | hung.

  Therefore, in the present specification and the appended claims, the positional relationship between the front upper weak body portion 51 and the lower weak body portion 53 of the second front side member 5, and the rear upper weak body portion 52 and the lower side member. The positional relationship with the weak body portion 54 is expressed as “the lower weak body portions 53 and 54 are respectively provided at substantially opposing positions below the upper weak body portions 51 and 52 of the lower surface portion 5L”.

  Further, by making the weak body portion 41 of the front cross member 4 a cut-out portion, it is possible to transmit the impact load only to the lower surface portion 4L without transmitting the impact load to the upper surface portion 4U of the front cross member 4. It becomes like this. Even if the weak body portion 41 of the front cross member 4 is provided over the entire length of the upper surface portion 4U in the vehicle width direction, the second front side member 5 can be deformed in the above-described deformation mode.

  In addition, by making the upper weak body parts 51 and 52 and the lower weak body parts 53 and 54 respectively a part provided with a fold bead or a part provided with a hole in the trunk part 50 of the second front side member 5, Since a space can be provided in the weak body portion, it is easily deformed.

  The front end 4a of the lower surface 4L of the front cross member 4, the rear end 4b of the lower surface 4L, the front end 5a of the lower surface 5L of the second front side member 5, and the front end 5b of the upper surface 5U are indicated by black dots. Although shown, this is for easy understanding of how these positions change, and does not represent the shape of the part.

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

DESCRIPTION OF SYMBOLS 1, 1 ... Left-right paired 1st front side member 2 ... Radiator support 3 ... Front bumper cover 4 ... Front cross member 4U ... Upper surface part 41 ... Weak part 5 ... 2nd front side member 5U …… Upper surface portion 5L …… Lower surface portion 50a …… Body portion positioned between the front end of the second front side member and the upper weak body portion and the lower weak body portion on the front side 50b …… Second front side member Body 50b located between the upper weak part and the lower weak part on the front side and the upper weak part and the lower weak part on the rear side

Claims (5)

A pair of left and right first front side members disposed along the vehicle front-rear direction at the front of the vehicle;
A radiator support connected between the pair of left and right first front side members;
A front cross member having a substantially rectangular annular cross-sectional shape extending in a vehicle width direction at a front end of the vehicle at a lower portion of the front bumper cover;
A shock absorbing structure in a vehicle front portion including a second front side member having an annular closed cross section connected between a lower portion of the radiator support and the front cross member,
The front cross member is provided with a weak part on the upper surface part,
Each of the second front side members is provided with an upper weak body portion at the front and rear of the upper surface portion in the vehicle front-rear direction, and the lower weak body portion is disposed at a substantially opposite position below each upper weak body portion of the lower surface portion. A shock absorbing structure in a front portion of the vehicle, wherein the shock absorbing structure is provided.   The rigidity of the front cross member and the second front side member in the vehicle front-rear direction is such that the weak body portion <the upper weak body portion on the front side and the lower weak body portion on the front side <the upper weak body portion on the rear side. And the lower weak body portion <the lower surface portion of the front cross member <the front end of the second front side member and the body portion located between the upper weak body portion and the lower weak body portion on the front side <the above The body portion located between the upper weak body portion and the lower weak body portion on the front side of the second front side member and the upper weak body portion and the lower weak body portion on the rear side is strengthened in this order. The shock absorbing structure in the front portion of the vehicle according to claim 1, wherein the shock absorbing structure is set.   3. The shock absorbing structure in the front portion of the vehicle according to claim 1, wherein the weak body portion is provided in the vicinity of a joining position of the second front side member.   The shock absorbing structure in the vehicle front portion according to any one of claims 1 to 3, wherein the weak body portion is a cut-out portion.   The said upper weak body part and the said lower weak body part are the site | parts in which the fold bead was each provided, or the site | part in which the hole was provided, The any one of Claims 1 thru | or 4 characterized by the above-mentioned. Shock absorbing structure at the front of the vehicle.