JP2015101224A - Vehicle body front structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the absorbing effect of collision energy and fully mitigate an impact so that load in the event of a collision can be transmitted to the whole vehicle width direction.SOLUTION: A vehicle body front structure includes: an impact absorber 3 which has connection parts 19 connected to a bumper face 2 having insertion recesses 7 positioned separated in a vehicle width direction and open to a rear side, which has insert recesses positioned separated in the vehicle width direction and open to the rear side, and which has insertion parts 20 inserted into the insertion recesses from the rear side; and an undercover 4 which has connection protrusions 25 connected to the bumper face and insertion insert parts inserted into the insert recesses from the rear side. Since in the event of a collision, load is transmitted to the impact absorber through the insertion recesses of the bumper face, and also load is transmitted to the undercover through the insert recesses positioned separately in the vehicle width direction, the load in the event of the collision is transmitted to the whole vehicle width direction. Therefore, the absorbing effect of collision energy can be improved and an impact can be fully mitigated.

Description

  The present invention relates to a technical field of a front structure of a vehicle body having a bumper face and a shock absorber.

JP 2004-203158 A Special table 2008-506589 gazette

  As the front structure of the vehicle body on which the bumper face and shock absorber are arranged, a shock absorber (reinforcing member or reinforcing plate) made of a resin material or the like is arranged inside the bumper face, and the shock absorber is the bumper face. There is a structure in which a fastening member is coupled to a predetermined member such as an undercover positioned rearward (see, for example, Patent Document 1 and Patent Document 2). The under cover is generally provided for reducing resistance during traveling of the vehicle.

  In the front structure of the vehicle body described in Patent Document 1, the shock absorber is coupled to the bumper face by fastening members at a plurality of locations in the vehicle width direction, and the shock absorber is rearward from the central portion in the vehicle width direction. A protruding portion (extending portion) is provided, and the protruding portion is coupled to the under cover by a fastening member.

  Moreover, in the front part structure of the vehicle body described in Patent Document 2, the shock absorber is provided with a plurality of protrusions (rear arms) that are separated in the vehicle width direction, and these protrusions are attachment members. Each of the bumper faces is coupled to a rear end portion of the bumper face by a fastening member via an (attachment post).

  However, in the front structure of the vehicle body described in Patent Document 1 and Patent Document 2, a shock absorber is coupled to the bumper face, and a projecting portion projecting rearward is provided on the shock absorber. Is coupled to a predetermined member such as an undercover.

  Accordingly, the shock absorber is locally coupled to the under cover or the like, and in the unlikely event that the vehicle collides with a pedestrian or the like, the load at the time of the collision is transmitted to the entire vehicle in the width direction. It is not structured, and the collision energy at the time of collision is not sufficiently absorbed, and the impact mitigating effect may be insufficient.

  Also, a structure in which a predetermined member such as an under cover located behind the bumper face is not used as a structure for reducing the impact, and the collision energy is absorbed only by the shock absorber at the time of collision. Has been.

  Therefore, the present invention has an object to overcome the above-described problems and enhance the impact energy absorption effect by transmitting the load at the time of the collision in the entire width direction of the vehicle to sufficiently reduce the impact. And

  1stly, the front part structure of the vehicle body which concerns on this invention is a bumper face which has the recessed part for insertion extended in the width direction of a vehicle, or was spaced apart in the width direction of the vehicle and opened back, and the said bumper face A shock absorber having a coupling portion to be coupled, an insertion recess that extends in the width direction of the vehicle or is spaced apart in the width direction of the vehicle and opens rearward, and an insertion portion that is inserted into the insertion recess from the rear. A body, and an undercover having a coupling protrusion coupled to the bumper face and an insertion insertion portion inserted into the insertion recess from behind.

  As a result, the load is transmitted to the shock absorber through the recess for insertion of the bumper face that is extended in the width direction of the vehicle or spaced apart in the width direction of the vehicle at the time of collision, and extends in the width direction of the vehicle. The load is transmitted to the under cover through the insertion recesses spaced apart in the width direction.

  Second, in the vehicle body front structure according to the present invention described above, the shock absorber may be provided with a shock absorber, and the shock absorber may be formed in a frame shape penetrating in the width direction of the vehicle. desirable.

  Thereby, the return force with respect to the load when the load is transmitted from the bumper face to the shock absorbing portion at the time of the collision is increased, and the shock absorbing effect is enhanced.

  3rdly, in the front part structure of the vehicle body which concerns on above-mentioned this invention, the said recessed part for insertion and the said insertion insertion part are provided in multiple numbers spaced apart in the width direction of a vehicle, respectively, and the said some in the said under cover It is preferable that a portion between the insertion insertion portions is provided as a protruding tooth portion protruding forward from the insertion insertion portion, and at least one of the plurality of protruding tooth portions is provided as the coupling protrusion.

  As a result, the tooth portion is easily deformed, and the tooth portion is reliably deformed in the initial stage of the collision, the impact is dispersed, and the load is transmitted to the entire under cover.

  Fourthly, in the vehicle body front structure according to the present invention described above, it is desirable that the coupling portion and the coupling protrusion are coupled to the bumper face in a state where the coupling portion and the coupling projection are overlapped.

  As a result, the shock absorber is bonded to the bumper face and the under cover is bonded to the bumper face at the same time, and the thickness of the bonded portion is increased.

  Fifth, in the vehicle body front structure according to the present invention described above, the insertion plugs are located on both sides in the width direction of the coupling protrusion located on the outermost side in the width direction of the vehicle. Is desirable.

  Thus, when a force in the peeling direction from the bumper face is applied to the coupling protrusion at the time of collision, the coupling protrusion is peeled off from the bumper face by the engagement of the insertion insertion part with the insertion recess. The power to suppress is generated.

  Sixthly, in the above-described front part structure of the vehicle body according to the present invention, it is desirable that a part of the projecting tooth portions is provided as the coupling projecting portion.

  This reduces the number of places where the undercover bumper face is coupled.

  According to the present invention, a load is transmitted to the shock absorber through a recess for insertion of a bumper face that extends in the width direction of the vehicle or is spaced apart in the width direction of the vehicle at the time of collision, and in the width direction of the vehicle. Since the load is transmitted to the under cover through the insertion recess that is extended or spaced apart in the vehicle width direction, the load at the time of the collision is transmitted to the entire vehicle in the width direction, thereby absorbing the collision energy. And the impact can be sufficiently mitigated.

2 to FIG. 10 show an embodiment of a front structure of a vehicle body of the present invention, and this figure is an exploded perspective view of the front structure of the vehicle body. It is a perspective view of the front part structure of a vehicle body. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is sectional drawing which follows the VV line of FIG. It is an expansion perspective view which shows a part of shock absorber. It is a perspective view of an undercover. It is a conceptual diagram which shows the state at the time of a collision. It is a perspective view which shows the example in which the insertion insertion part was provided in the right and left both sides of the protrusion for a coupling located in the left-right both ends. It is sectional drawing which shows the example in which the front-end | tip part of the insertion insertion part in an undercover was formed in the shape bent in the up-down direction.

  EMBODIMENT OF THE INVENTION Below, the form for implementing the front part structure of this invention vehicle body is demonstrated with reference to an accompanying drawing.

  The following front structure of the vehicle body has a bumper face, a shock absorber, and an under cover. These bumper face, shock absorber, and under cover are gently bent according to the shape of the front part of the vehicle. In order to simplify the explanation, a bumper face and a shock absorber formed in a shape extending linearly in the width direction (left-right direction) of the vehicle will be described below. An under cover is shown as an example.

<Configuration of vehicle front structure>
The front structure 1 of the vehicle body is disposed as a basic skeleton structure, a bumper face 2 disposed at the lower end portion of the front end portion of the vehicle, an impact absorber 3 disposed inside the bumper face 2, and a lower end portion of the vehicle. And an under cover 4 (see FIGS. 1 and 2).

  The bumper face 2 extends in the width direction of the vehicle, and has an upper face portion (not shown) and a lower face portion 5 positioned below the upper face portion. The lower face portion 5 is formed in a curved surface that protrudes forward in the vertical cross-sectional shape, and the upper end 5a is positioned in front of the lower end 5b.

  Between the upper face portion and the lower face portion 5 of the bumper face 2, a lattice-like grill 6 that guides outside air to the engine room is disposed. A holding recess 6a that is opened rearward is provided at the lower end of the grill 6 (see FIGS. 3 to 5). Engagement holes 6b, 6b, 6b penetrating in the front-rear direction are formed in the lower end portion of the grill 6 so as to be separated from each other in the left-right direction.

  A projecting wall portion 5c that protrudes rearward and extends leftward and rightward is provided at an intermediate portion in the vertical direction of the lower face portion 5, and the lower face portion 5 has a vertical cross section by a projecting wall portion 5c and a portion positioned below the projecting wall portion 5c. A concave (substantially V-shaped) insertion recess 7 that opens rearward in shape is provided. The lower face part 5 is provided with a plurality of projecting wall parts spaced apart from each other in the left and right directions, and a plurality of insertions spaced apart from each other by the plurality of projecting wall parts and the parts located below them. A concave portion for use may be provided.

  The lower end portion of the lower face portion 5 is provided as a plurality of coupling end portions 8, 8,... That are partly spaced apart from each other on the left and right sides (see FIG. 1). For example, the lower face portion of the lower face portion 5 is provided with a central portion in the left-right direction and portions near the left and right ends as connecting end portions 8, 8, 8, respectively. Insertion holes 8a, 8a, 8a are formed so as to pass through.

  Each part of the shock absorber 3 is formed integrally with a resin material, and as shown in FIGS. 1 and 2, the shock absorber 3 is formed in a shape extending in the vehicle width direction (left-right direction), and includes a base surface portion 9 and a step surface portion 10. The connecting surface portion 11, the projecting surface portions 12, 12,... And the shock absorbing portions 13, 13,.

  The base surface portion 9 is formed in a plate shape facing in the up-down direction, and the step surface portion 10 is formed in a plate shape protruding upward from the front edge of the base surface portion 9 and facing in the front-rear direction (see FIGS. 3 to 6).

  The connecting surface portion 11 projects forward from the upper edge of the stepped surface portion 10 and is formed in a plate shape that faces the vertical direction except for a part of the tip portion. Both end portions in the left-right direction of the connecting surface portion 11 are bent upward and are provided as reinforcing portions 11a and 11a. The connecting surface portion 11 is reinforced by the reinforcing portions 11a and 11a, and bending is suppressed. Engagement claw portions 11b, 11b, 11b protruding forward are provided between the reinforcing portions 11a, 11a at the distal end portion of the connecting surface portion 11 so as to be separated from each other in the left-right direction.

  The projecting surface portions 12, 12,... Are formed in a plate shape projecting obliquely downward from the front edge of the base surface portion 9, and are provided at equal intervals on the left and right.

  The shock absorbing parts 13, 13,... Are respectively provided between the projecting surface parts 12, 12,... (See FIGS. 1 and 6). Therefore, the projecting surface portions 12, 12,... And the shock absorbing portions 13, 13,... Are alternately arranged in the left-right direction.

  As shown in FIGS. 3 to 6, the impact absorbing portion 13 includes a rear surface portion 14 formed in a plate shape facing in the front-rear direction, a slope portion 15 formed in a plate shape facing in an oblique direction, and a plate shape facing in the up-down direction. And a side surface portions 17 and 17 formed in a plate shape facing in the left-right direction.

  The rear surface portion 14 protrudes downward from the rear edge of the base surface portion 9, and the inclined surface portion 15 protrudes obliquely downward from the lower edge of the rear surface portion 14.

  Of the lower surface portions 16, 16,..., For example, the rear surfaces of the three lower surface portions 16, 16, 16 are connected to the front edge of the slope portion 15, and the other lower surface portions 16, 16,. A portion near the end is continued to the front edge of the slope portion 15. The lower surface portion 16 whose rear end portion is connected to the front edge of the slope portion 15 has a rear end portion located behind and below the front end of the slope portion 15, and a portion located behind and below the front end of the slope portion 15. The protruding piece 16a is provided. A concave (substantially V-shaped) insertion recess 18 that opens rearward in a vertical cross-sectional shape is provided by the protruding piece 16a and the front end of the slope 15 positioned on the upper side.

  Three lower surface portions 16, 16, 16 whose rear edges are continuous with the front edge of the inclined surface portion 15 are provided as coupling portions 19, 19, 19 among the lower surface portions 16, 16,. Of the lower surface portions 16, 16,..., For example, lower surface portions 16, 16, and 16 that are present at positions near the center and both left and right ends are provided as coupling portions 19, 19, 19, respectively. The coupling portions 19, 19, 19 are formed with coupling insertion holes 19 a, 19 a, 19 a, respectively.

  The side surface portions 17 and 17 are formed in a substantially parallelogram frame shape, and are positioned facing each other in the left-right direction. The side surface portion 17 has an upper side portion 17a that is continuous with each side edge of the base surface portion 9 and the rear surface portion 14, and a rear end that is continuous with each side edge of the slope portion 15 and the rear surface portion 14 and is continuous with the rear end of the upper side portion 17a. The first oblique side portion 17b, the lower half portion that is continuous with the side edge of the lower surface portion 16 and the rear end portion that is continuous with the front end of the first oblique side portion 17b, and the protruding portion 12 side. A second oblique side portion 17d is connected to the edge, the rear end is continuous to the front end of the upper side portion 17a, and the front end is continuous to the front end of the lower side portion 17c.

  The upper side portion 17a and the lower side portion 17b are in a substantially parallel state, the first oblique side portion 17b and the second oblique side portion 17d are in a substantially parallel state, and the lower half portion 17b has a front half portion protruding forward from the lower surface portion 17. Has been. The lower side portion 17b has a front end positioned on the front side of the front end of the upper side portion 17a, and the second inclined side portion 17d has a front end positioned on the front side near the front end of the first inclined side portion 17b.

  The shock absorber 13 is formed with a wedge-shaped portion protruding forward as viewed from the left and right directions by the front end portion of the projecting surface portion 12 and the front end portion of the shock absorber portion 13, and this wedge-shaped portion is inserted into the bumper face 2. It is provided as an insertion portion 20 to be inserted into the concave portion 7 for use.

  Each part of the under cover 4 is integrally formed of a resin material, and as shown in FIGS. 1 and 7, the under cover 4 is formed in a shape extending in the vehicle width direction (left and right direction), and includes a base surface portion 21 and a front inclined portion 22. .. and tooth insertion portions 24, 24,...

  The base surface portion 21 is formed in a plate shape facing in the vertical direction, and the front inclined portion 22 is formed in a plate shape so as to protrude obliquely upward and forward from the front edge of the base surface portion 21 (FIGS. 3, 4, 5, and 5). 7).

  The teeth 23, 23,... Are formed in a substantially rectangular plate shape protruding forward from a portion near the upper end of the front inclined portion 22, and are provided apart from each other on the left and right. A plurality of tooth portions 23, 23,..., For example, three tooth portions 23, 23,... Are formed in a horizontally longer shape than the other tooth portions 23, 23,. 25 and 25 are provided. Of the toothed portions 23, 23,..., For example, toothed portions 23, 23, 23 located at the center and both left and right ends are provided as connecting protrusions 25, 25, 25, respectively. The coupling protrusions 25, 25, 25 are formed with coupling holes 25a, 25a, 25a, respectively.

  As described above, the under cover 4 is provided with the projecting tooth portions 23, 23,...

  The lateral width of the projecting tooth portion 23 other than the coupling protrusion 25 is substantially the same as the distance between the impact absorbing portions 13, 13 of the shock absorber 3, and the lateral width of the coupling protrusion 25 is the two protrusions of the shock absorber 3. The total width of the surface portions 12 and 12 and one shock absorbing portion 13 is made substantially the same. The interval between the projecting tooth portions 23, 23,... Is substantially the same as the lateral width of the shock absorbing portion 13.

  The insertion insertion parts 24, 24,... Protrude forward from the upper edge of the front inclined part 22, and are respectively provided between the projecting tooth parts 23, 23,. The forward protruding amount of the insertion plug 24 from the front inclined portion 22 is made smaller than the forward protruding amount of the protruding portion 23 from the front inclined portion 22.

  The under cover 4 is provided with a horizontal rib 4a and vertical ribs 4b, 4b,... On the upper surface side (see FIG. 7). The horizontal rib 4a extends in the left-right direction and is provided on the base surface portion 21, the vertical ribs 4b, 4b,... Extend in the front-rear direction and is provided at a position extending from the base surface portion 21 to the front inclined portion 22, and the rear end is the horizontal rib 4a. The front is continuous. The strength of the under cover 4 is increased by the horizontal ribs 4a and the vertical ribs 4b, 4b,.

  As shown in FIGS. 3 to 5, a radiator lower frame 40 that holds a radiator (not shown) is disposed behind the bumper face 2, and a bracket 50 is attached to and held by the radiator lower frame 40.

<Assembly of bumper face, shock absorber and under cover>
In the vehicle front structure 1 configured as described above, the bumper face 2, the shock absorber 3 and the under cover 4 are assembled as follows (see FIGS. 2 to 5).

  The protrusions 23, 23,... (Coupling protrusions 25, 25, 25) of the under cover 4 are overlapped on the upper surface of the lower end of the shock absorber 3, and the upper surfaces of the protrusions 23, 23,. Are respectively overlapped with lower surface portions 16, 16,... (Coupling portions 19, 19, 19) of the shock absorber 3 (see FIG. 3). In this state, the insertion holes 8a, 8a, 8a of the coupling end portions 8, 8, 8 and the coupling holes 25a, 25a, 25a of the coupling projections 25, 25, 25 and the coupling portions 19, 19, 19 are inserted for coupling. Clips 30, 30, 30 are inserted into the holes 19 a, 19 a, 19 a in order from the lower side, and the shock absorber 3 and the undercover 4 are coupled to the bumper face 2 by the clips 30, 30, 30. Therefore, the undercover 4 is coupled to the bumper face 2 and the shock absorber 3 with the coupling protrusion 25 being sandwiched between the coupling end 8 of the bumper face 2 and the coupling portion 19 of the shock absorber 3.

  As described above, since the shock absorber 3 and the under cover 4 are coupled to the bumper face 2 with the coupling portion 19 and the coupling protrusion 25 overlapped with the coupling end portion 8, the impact on the bumper face 2 is affected. The joining of the absorber 3 and the joining of the under cover 4 to the bumper face 2 are performed at the same time, so that the working efficiency in the joining work can be improved and the thickness of the joining part is increased, so that the front structure 1 of the vehicle has high strength. Can be secured.

  In addition, since some of the protruding portions 23, 23, 23 of the protruding portions 23, 23,... Are provided as the connecting protruding portions 25, 25, 25, the under cover 4 is coupled to the bumper face 2. The number of locations is reduced, and the working efficiency in the joining work can be further improved.

  In the state where the shock absorber 3 is coupled to the bumper face 2 as described above, the shock absorber 3 has the insertion portions 20, 20,. It is inserted into the concave portion 7 (see FIGS. 3 to 5). At this time, the insertion portion 20 is not in contact with or in contact with the insertion recess 7. The shock absorber 3 is engaged by engaging claw portions 11b, 11b, and 11b of the connecting surface portion 11 inserted into engaging holes 6b, 6b, and 6b of the grill 6, respectively, and the reinforcing portions 11a and 11a of the connecting surface portion 11 are engaged. The removed front end is inserted into the holding recess 6 a and joined to the lower end of the grill 6.

  Further, the shock absorber 3 is fixed to the bracket 50. The shock absorber 3 may be fixed to the radiator lower frame 40, or may be fixed to other structural parts of the vehicle body such as the crash box other than the bracket 50 and the radiator lower frame 40.

  In the state in which the under cover 4 is coupled to the bumper face 2 as described above, the under cover 4 has insertion insertion portions 24, 24,. (See FIG. 4). At this time, the insertion plug 24 is brought into non-contact or contact with the insertion recess 18.

  The undercover 4 has the protruding portions 23, 23,... Other than the protruding portions 25, 25, 25 of the protruding portions 23, 23,. , 13,... Are inserted from behind.

  As described above, the tooth insertion portions 23, 23,... Are inserted from the rear between the shock absorbing portions 13, 13,. The positions of the insertion portions 24, 24,... Relative to the insertion recesses 18, 18,... Are determined, and the insertion insertion portions 24, 24,. The insertion operation can be facilitated.

  . Are inserted between the shock absorbing portions 13, 13,..., Respectively, so that the shock absorbing portions 13, 13,... And the protruding tooth portions 23, 23,. Since are alternately positioned in the left-right direction, it is possible to make it difficult for the undercover 4 to fall off the shock absorber 3.

  As described above, the coupling protrusions 25, 25, 25 are overlapped with the coupling end portions 8, 8, 8 of the bumper face 2, respectively, and the coupling end portions 8, 8, 8 and the coupling portion 19 of the shock absorber 3 are combined. , 19 and 19 are coupled to the bumper face 2. At this time, the shock absorbing portions 13 and 13 are located close to the left and right sides of the coupling protrusion 25.

  The under cover 4 is fixed to a cross member (not shown) whose rear end is a part of the structure of the vehicle body.

<State at the time of collision>
Next, a state when a vehicle and a pedestrian collide will be described (see FIG. 8).

  Should a vehicle collide with a collision object 100 such as a pedestrian, the bumper face 2 is deformed by the collision, and the load is first applied from the bumper face 2 to the joints 19, 19, 19 and the under cover 4 of the shock absorber 3. Are transmitted to the connecting projections 25, 25, 25. The undercover 4 is provided with projecting tooth portions 23, 23,... Separated from each other on the left and right sides, and is formed in a comb-like shape, so that the coupling projecting portions 25, 25, 25 (projecting tooth portions 23, 23, 23). When the load is transmitted to the coupling protrusions 25, 25, 25, first, the coupling protrusions 25, 25, 25 are reliably deformed in the under cover 4.

  When the coupling protrusions 25, 25, 25 are thus deformed, the load is transmitted to the entire under cover 4 and the entire under cover 4 is deformed. Therefore, the reliability and stability of the overall deformation behavior of the under cover 4 are achieved, the load is distributed regardless of the collision position, the under cover 4 is deformed in a wide range, and plastic deformation due to local stress (stress concentration) is suppressed. Thus, the range of elastic deformation is expanded. By expanding the range of elastic deformation of the under cover 4, the repulsive force against the collision is increased, and the pedestrian is protected.

  Further, when the bumper face 2 is deformed, a load is transmitted from the insertion recess 7 to the insertion portions 20, 20,... Of the shock absorber 3 due to the deformation of the bumper face 2 and the deformation of the shock absorber 3 due to the deformation of the bumper face 2. Accordingly, the load is transmitted from the insertion recesses 18, 18,... To the insertion insertion portions 24, 24,.

  In this way, the load is transmitted from the bumper face 2 to the insertion portions 20, 20,... Of the shock absorber 3 and the insertion insertion portions 24, 24,. ,..., The load is transmitted to the entire shock absorber 3, and the load is also transmitted to the entire under cover 4 from the insertion plugs 24, 24,. And the under cover 4 are integrally deformed. Accordingly, the relative movement (deformation) of the bumper face 2, the shock absorber 3 and the under cover 4 is restrained, and the bumper face 2, the shock absorber 3 and the under cover 4 are deformed as a unitary three-piece, and the impact at the time of collision is determined. It functions as a structure that absorbs water.

  In addition, when the load is transmitted to the insertion insertion portions 24, 24,..., First, in the under cover 4, first, the insertion difference is transmitted in the same manner as when the load is transmitted to the coupling protrusions 25, 25, 25. The inserts 24, 24,... Are reliably deformed, the load is transmitted to the entire under cover 4, and the entire under cover 4 is deformed. Therefore, further certainty and stability of the overall deformation behavior of the undercover 4 is achieved, the load is distributed regardless of the collision position, the undercover 4 is deformed in a wide range, and plastic deformation due to local stress (stress concentration) is achieved. Is suppressed, and the range of elastic deformation is expanded.

  Further, the impact absorber 3 is crushed by the deformed bumper face 2 at the time of collision. At this time, the bumper face 2 comes into contact with the shock absorbing portions 13, 13,... Of the shock absorber 3, and the shock absorbing portions 13, 13,. The shock absorbing part 13 has side parts 17 and 17 formed in a substantially parallelogram shape, but the side parts 17 and 17 are crushed by the bumper face 2 so that the lower side part 17c and the second oblique side part 17d are substantially linear. (See FIG. 8). In FIG. 8, the state before the side surface portion 17 is deformed is indicated by a broken line, and an example of the deformed state is indicated by a solid line.

  Accordingly, the side surface portions 17 and 17 are deformed into a substantially triangular shape to form a truss structure in the shock absorber 3, and the lower leg support of the pedestrian is further expanded downward. Since the truss structure is a structure having high strength against a load, the lower leg of the pedestrian can be firmly received while ensuring high strength at the time of collision in the front structure 1 of the vehicle.

  In the shock absorber 3, the load is dispersed regardless of the collision position. In particular, the shock absorbers 13, 13,... Are deformed in a wide range, and the plastic deformation due to local stress (stress concentration) is suppressed, and the elastic body is elastic. The range of deformation is expanded to increase the repulsive force against the collision, thereby protecting the pedestrian.

<Summary>
As described above, in the front structure 1 of the vehicle, the shock absorber 3 is inserted into the insertion recess 7 of the bumper face 2 in a state where the shock absorber 3 and the under cover 4 are coupled to the bumper face 2. The insertion parts 20, 20,... Are inserted from the rear, and the insertion insertion parts 24, 24,. Has been inserted.

  Therefore, in addition to the bumper face 2 and the shock absorber 3, the under cover 4 is effectively used as a structure that absorbs the shock, and the load at the time of the collision is transmitted to the entire vehicle in the width direction. Absorption effect is enhanced, and impact can be sufficiently mitigated.

  Further, the insertion portions 20, 20,... Of the shock absorber 3 are inserted into the insertion recesses 7 of the bumper face 2 from behind, and the undercovers are inserted into the insertion recesses 18, 18,. Since the four insertion plugs 24, 24,... Are inserted from the rear, the insertion units 20, 20,... And the insertion plugs 24, 24,. The bumper face 2 and the shock absorber 3 are stretched to function as a portion having a resistance against a load generated at the time of collision.

  Therefore, the impact absorber 3 and the under cover 4 effectively function as a portion that receives an impact at the time of collision, and the impact can be further reduced.

  Further, since the shock absorbers 13, 13,... Of the shock absorber 3 are formed in a frame shape penetrating in the width direction of the vehicle, a high shock absorbing effect can be secured and the elastic deformation range is expanded. The return force can be improved. In particular, since the side surface portions 17 and 17 of the shock absorbing portion 13 are formed in a substantially parallelogram shape, as described above, the side surface portions 17 and 17 are deformed into a substantially triangular shape at the time of collision, and a truss structure is configured. The high strength of the shock absorber 3 can be ensured.

  Furthermore, since the under cover 4 is formed in a comb-teeth shape by the projecting tooth portions 23, 23,... Spaced apart from each other on the left and right, the projecting tooth portions 23, 23,. In this initial stage, the teeth 23, 23,... Are reliably deformed, the impact is dispersed, the load is transmitted to the entire under cover 4, and the entire under cover 4 is deformed. A high impact absorbing effect can be ensured.

  In addition, since the load is transmitted to the entire under cover 4 and the entire under cover 4 is deformed, the load is dispersed regardless of the collision position, the under cover 4 is deformed in a wide range, and plastic deformation is suppressed. The return force on the lower leg side of the person is increased, and the intrusion of the pedestrian into the lower side of the vehicle is suppressed, so that the pedestrian can be protected.

  Furthermore, since the entire structure around the air dam is deformed, the functionality of the structure and the efficiency of arrangement of the structure are improved, and the weight and cost of the front structure 1 of the vehicle can be reduced. .

  In addition, since the shock absorber 3 and the under cover 4 are coupled to the bumper face 2 by the clips 30, 30, 30, the coupling structure can be simplified and the workability in the coupling operation can be improved, and the vehicle Simplification and cost reduction of the front structure 1 can be achieved.

  In the above, an example in which the shock absorber 3 and the under cover 4 are coupled to the bumper face 2 by the clips 30, 30, 30 has been shown. For example, the shock absorber 3 and the under cover 4 are bolts, nuts, etc. It is also possible to adopt a configuration that is coupled to the bumper face 2 by other means.

<Others>
In the above, in the under cover 4, the example in which the protrusions 23, 23 positioned on the outermost side in the left-right direction are provided as the connection protrusions 25, 25 is shown. It is desirable to provide insertion plugs 24, 24 on both the left and right sides of the protrusion 25 (see FIG. 9).

  In this way, the insertion insertion portions 24, 24 are provided on both the left and right sides of the coupling protrusion 25 located on the left and right ends, so that the force in the peeling direction from the bumper face 2 is applied to the coupling protrusion 25 at the time of collision. Is applied, the force that suppresses the separation of the coupling protrusion 25 from the bumper face 2 by the engagement of the insertion insertion parts 24, 24 with respect to the insertion recesses 18, 18 of the shock absorber 3, Stabilization of the coupled state of the under cover 4 to the bumper face 2 can be achieved by the effect of suppressing separation of the coupling protrusions 25.

  Further, the insertion insertion portion 24 of the under cover 4 inserted into the insertion recess 18 of the shock absorber 3 may be formed in a shape in which the tip portion is bent in the vertical direction (see FIG. 10).

  By forming the distal end portion of the insertion insertion portion 24 into a shape bent in the vertical direction, the distal end portion of the insertion insertion portion 24 absorbs shock when the insertion insertion portion 24 is inserted into the insertion recess portion 18. In the assembling work of the undercover 4 to the shock absorber 3, it is guided by being slid by the slope 15 or the protruding piece 16 a of the body 3, and the insertion insertion portion 24 is easily inserted into the insertion recess 18. Workability can be improved.

  In the above, an example in which a plurality of insertion recesses 18 of the shock absorber 3 are provided apart from each other in the width direction of the vehicle is shown. However, the insertion recesses 18 have a groove shape extending in the width direction of the vehicle. May be.

  In addition, the bumper face 2, the shock absorber 3, and the under cover 4 each have three coupling end portions 8, 8, 8, coupling portions 19, 19, 19, and projecting teeth portions 23, 23, 23. Although the provided example is shown, the number of the coupling end portion 8, the coupling portion 19, and the projecting tooth portion 23 is arbitrary, and it is only necessary that a plurality are provided separated in the width direction of the vehicle.

  Further, in the above, the shock absorber 3 in which the substantially parallelogram-shaped side surface portions 17, 17,... Are provided on the shock absorbing portions 13, 13,. Instead of the body 3, it is also possible to use a shock absorber formed in a concave shape (trumpet shape) in which the shock absorbing portion opens forward.

  DESCRIPTION OF SYMBOLS 1 ... Front part structure of vehicle body, 2 ... Bumper face, 3 ... Shock absorber, 4 ... Under cover, 7 ... Recess for insertion, 13 ... Shock absorption part, 18 ... Recess for insertion, 19 ... Joint part, 20 ... Insertion part, 23 ... projecting tooth part, 24 ... insertion insertion part, 25 ... projection for coupling

Claims (6)

A bumper face having a recess for insertion that extends in the width direction of the vehicle or is spaced apart in the width direction of the vehicle and opened to the rear;
A coupling portion coupled to the bumper face; an insertion recess extending in the width direction of the vehicle or spaced apart in the vehicle width direction and opened rearward; and an insertion portion inserted into the insertion recess from the rear A shock absorber having
A front part structure of a vehicle body, comprising: a coupling protrusion coupled to the bumper face; and an under cover having an insertion insertion portion inserted into the insertion recess from behind. A shock absorber is provided in the shock absorber,
The front part structure of the vehicle body according to claim 1, wherein the shock absorbing part is formed in a frame shape penetrating in a width direction of the vehicle. A plurality of the recessed portions for insertion and the insertion insertion portions are provided apart from each other in the width direction of the vehicle,
A portion between the plurality of insertion insertion portions in the under cover is provided as a protruding tooth portion protruding forward from the insertion insertion portion,
The front part structure of the vehicle body according to claim 1, wherein at least one of the plurality of projecting tooth portions is provided as the coupling protrusion. The front part structure of the vehicle body according to claim 1, wherein the coupling part and the coupling protrusion are coupled to the bumper face in an overlapped state. The vehicle body according to claim 1, 2, 3, or 4, wherein the insertion insertion portions are respectively located on both sides in the width direction of the coupling protrusion located on the outermost side in the vehicle width direction. Front structure. The front part structure of the vehicle body according to claim 3, wherein a part of the projecting tooth portions is provided as the coupling projecting portion.

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