JP4802736B2 - Automotive front structure - Google Patents

Description

This invention relates to a front structure of an automotive vehicle, in particular, a bumper face, to front structure of a motor vehicle with a shroud lower portion is disposed behind the bumper face.

  Conventionally, as a front structure of an automobile, a bumper face is composed of an upper portion and a lower portion, and a bumper face lower reinforcing portion is provided inside the lower portion of the bumper face (patent). Reference 1).

  In Patent Document 1, by providing a bumper face lower reinforcing portion, when the pedestrian comes into contact with the pedestrian during traveling of the vehicle, the pedestrian is surely removed (the pedestrian's leg is caught under the vehicle). Can be surely prevented).

  Further, Patent Document 1 discloses a structure in which a bumper face lower reinforcing portion is connected to a cross member via an under cover that covers a lower surface of a front portion of the vehicle in order to reduce vehicle running resistance. Accordingly, the bumper face lower reinforcing portion can be supported rearward with high strength while suppressing an increase in weight, and leg-paying performance when contacting a pedestrian during vehicle traveling is improved.

JP 2004-203158 A

  However, the under cover is only a member provided to reduce the running resistance during vehicle running, and is not a member provided for the purpose of improving the strength of the lower part of the vehicle body. Absent.

  Therefore, although the bumper face lower reinforcing portion is connected to the cross member having high strength, the structure in which the bumper face lower reinforcing portion is connected to the under cover as described above is said to have sufficient support strength of the reinforcing portion. hard. Therefore, the bumper face lower reinforcing portion may be displaced rearward when contacting a pedestrian while the vehicle is running, and the bumper face lower reinforcing portion may not function sufficiently as a member for improving leg-patting performance. .

  Further, in the structure disclosed in Patent Document 1, since it is essential to provide an under cover in order to support the bumper face lower reinforcing portion, there is a problem that the number of parts is increased accordingly.

  The present invention provides a front part of an automobile that can prevent an increase in the number of parts for supporting a bumper face lower reinforcing part and can reliably prevent a rearward displacement of the bumper face lower reinforcing part and improve leg-paying performance. The purpose is to provide a structure.

Front structure of a motor vehicle of the invention, the front structure of an automobile, and the bumper face, the shroud lower portion rearward of the bumper face is provided, comprising a, the bumper face, upper portion and a lower portion consist of a, located inwardly of the lower portion of the bumper face is provided with a bumper face lower reinforcing portion is fastened to the lower end of the lower portion, the extending portion extending either et rearward the bumper face lower reinforcing portion The extending portion is fastened to the lower portion of the shroud, and the shroud is a resin shroud including an upper portion, a side portion, and a lower portion, and the upper portion, the side portion, and the lower portion are arranged in front and rear of the vehicle. A heat exchanger support having a cross-sectional rigidity higher than that of other portions is formed on both sides of the lower portion of the shroud, and the heat exchanger support is connected to the shroud of the shroud. A portion extending inward in the vehicle width direction from the side portion, and a fastening portion in the extending portion of the bumper face lower reinforcing portion is provided separately at both ends in the vehicle width direction, at both ends of the lower portion of the shroud. In addition, the bumper face lower reinforcing portion is fastened to the inner side in the vehicle width direction of the heat exchanger support portion, and the bumper face lower reinforcing portion is disposed inside the lower portion of the bumper face.

  According to this configuration, the bumper face lower reinforcing portion is directly fastened to the lower portion of the shroud having high rigidity to support the heat exchanger by the extending portion, so that the bumper mesh including the bumper face lower reinforcing portion is high. The support rigidity can be obtained, and as a result, when the vehicle comes into contact with the pedestrian, the pedestrian can be surely executed.

Further , the shroud is a resin shroud composed of an upper portion, a side portion, and a lower portion, and the lower portion of the shroud forms a heat exchanger support portion having a higher cross-sectional rigidity than other portions, Since the extension part is fastened to the inside of the heat exchanger support part in the vehicle width direction , the support rigidity of the bumper mesh including the bumper face lower reinforcement part can be improved without forming a dedicated reinforcement part. it can.

Further , the heat exchanger support portions are formed on both sides of the lower portion of the shroud, and heat exchanger support portions are formed on both sides of the lower portion of the shroud corresponding to the heat exchanger support portions. Since the fastening portion of the extension portion is formed on the inner side in the vehicle width direction , since the plurality of fastening portions of the extension portion are located apart from each other in the vehicle width direction, the fastening portion is closer to the center portion. Compared with the case where it is provided, the support state of the bumper face lower reinforcing portion can be stabilized.

In one embodiment of the present invention, the bumper face has an opening formed between an upper portion and a lower portion.

In one embodiment of the present invention, a bumper mesh is provided, and the bumper mesh is composed of a mesh body located in the opening and the bumper face lower reinforcing portion.

In one embodiment of the present invention, the extension portion extends rearward from the lower end of the bumper face lower reinforcing portion, and both side portions of the extension portion are fastened to the lower surface of the lower portion of the shroud, In the central portion of the extending portion, a protruding portion that protrudes upward from the lower surface of the lower portion of the shroud and extends in the front-rear direction is formed .

  According to this configuration, at the time of contact with the pedestrian, the center portion of the extending portion can be stretched by the lower portion of the shroud by the protruding portion, so that the leg-paying performance can be further improved.

In one embodiment of the present invention, a bulging portion that bulges forward in a position above the lower surface of the lower portion is formed in the lower portion of the shroud, and the protruding portion is fastened to the lower surface of the bulging portion. Is.

  According to this configuration, it is possible to achieve both the improvement of the support rigidity of the bumper face lower reinforcing portion and the improvement of the stretching performance of the lower portion of the shroud with respect to the central portion of the extension portion when contacting the pedestrian. .

  In one embodiment of the present invention, the vehicle width direction center portion of the lower portion of the shroud is fastened to the extension portion of the bumper face lower reinforcing portion at a vehicle front portion rather than the fastening portion of the extension portion. Is.

According to the present invention, the lower portion of the shroud having originally high rigidity, by fastening directly by the extending portion of the bumper face lower reinforcing portion, it is possible to obtain a Oite high support rigidity to the bumper face lower reinforcing portion. Therefore, while preventing an increase in the number of parts for supporting the bumper face lower reinforcing portion, it is possible to reliably prevent the bumper face lower reinforcing portion from being displaced rearward and improve the leg-paying performance.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front perspective view showing a front structure of an automobile according to an embodiment of the present invention, and FIG. 2 is a side view showing a bumper structure 1 in the front structure of the automobile according to an embodiment of the present invention. is there. As shown in FIG. 1, the front structure of an automobile in the present embodiment is mainly configured to include a bumper structure 1 and a shroud 2 in which a lower portion 23 is disposed behind the bumper structure 1. . In the present embodiment, the shroud 2 is a substantially rectangular frame-shaped resin member mainly composed of an upper portion 21, a side portion 22, and a lower portion 23. In the drawing, the arrow (F) indicates the front of the vehicle, and the arrow (R) indicates the rear of the vehicle.

  As shown in FIGS. 1 and 2, the bumper structure 1 includes a bumper face 11 (not shown in FIG. 1) and a bumper mesh 12, and is assembled to the front portion of the vehicle body.

  As shown in FIG. 2, the bumper face 11 includes an upper portion 11a and a lower portion 11b, and is integrally formed by injection molding. An opening 13 that is long in the vehicle width direction is formed between the upper portion 11a and the lower portion 11b, and a mesh body 14 that is formed in a lattice shape and introduces outside air to the engine room side is formed on the vehicle front side. Inserted from and fixed.

  A bumper face lower reinforcing portion 15 (hereinafter, abbreviated as a reinforcing portion 15) having a substantially arc shape in plan view is provided inside the lower portion 11 b of the bumper face 11 so as to extend in the vehicle width direction. 12 includes a mesh body 14 located in the opening 13 and the reinforcing portion 15.

Further, the reinforcing portion 15 is integrally formed with an extending portion 16 extending rearward from the lower end in the vehicle width direction, and the extending portion 16 further includes two fastening protrusions 16a, 16a (FIG. 1). Are formed on the left and right sides.

  Furthermore, the extension part 16 is formed in the vehicle width direction center part so that the protrusion part 17 which protruded upwards from others may extend in the front-back direction.

  In the present embodiment, the fastening protrusion 16a of the extending portion 16 is fastened to the lower surface of the lower portion 23 of the shroud 2 disposed behind the bumper face 11 with bolts 24B and nuts 24N, and the reinforcing portion 15 is supported. It has a structure.

  Here, the configuration of the bumper structure 1 will be further described with reference to FIGS. FIGS. 3A and 3B are a rear perspective view showing the bumper mesh 12 and a front view showing the bumper mesh 12 in the bumper structure 1, respectively. 4 (a), 4 (b), and 4 (c) are cross-sectional views taken along line AA in FIG. 3 (a), cross-sectional views taken along line BB in FIG. 4 (a), and FIG. It is a CC sectional view taken on the line in FIG.

In FIG. 3A, the reinforcing portion 15 includes a side surface portion 15a extending rearward at both left and right ends in the vehicle width direction, an upper surface portion 15b extending toward the front of the vehicle (see FIG. 4), and a front surface extending downward from the upper surface portion 15b. part 15c (see FIG. 4), and the outer surface frame from the front portion 15c by the lower surface portion 15d extending rearward is formed at the rear from the transverse rib 15e the front portion 15c connecting the side portions 15a to each other at both ends Further, the upper surface portion 15b, the front surface portion 15c, and the lower surface portion 15d are connected to each other, and a plurality of vertical ribs 15f substantially orthogonal to the horizontal ribs 15e are formed. Although the horizontal rib in FIG. 4 is a two, rather it may also be provided one, also, but it may also be provided three or more.

  In addition, since the front part of the horizontal rib 15e and the vertical rib 15f is formed integrally with the front surface part 15c and does not have a shape in which the front part protrudes, the impact on the contact part of the pedestrian when contacting with the vehicle Concentration of impact force due to the absorber tip can be prevented, and the degree of damage at the contact site can be reduced.

As shown in FIG. 4A, the extending portion 16 is provided by being integrally formed with the lower surface portion 15d, and the fastening protrusions 16a, 16a of the extending portion 16 are shown in FIG. As described above, bolt holes 16b and 16b serving as fastening portions with the lower portion 23 of the shroud 2 are formed. In addition, the fastening protrusions 16a and 16a of the extending portion 16 are formed with guide surfaces 16c inclined obliquely downward toward the front end (rear side of the vehicle) behind the bolt holes 16b and 16b.

  Further, as shown in FIG. 3B, the extending portion 16 is formed in a rib shape in which a plurality of uneven portions extending in the front-rear direction are formed along the vehicle width direction, and is in contact with a pedestrian. The shape has high rigidity with respect to the load from the front. Among the concavo-convex portions, the concavo-convex portion located at the center in the vehicle width direction is the protruding portion 17 protruding upward from the other portions. Further, a bolt hole 17a is formed on the upper end surface of the protruding portion 17 in the same manner as the fastening protruding portion 16a.

  In addition, as a shape of the extension part 16 surface, it is not limited to what formed the several uneven | corrugated | grooved part extended in the front-back direction as mentioned above. For example, a so-called honeycomb structure may be formed by forming a plurality of ribs so as to extend in the slant direction on the surface of the extending portion 16 excluding the protruding portion 17.

  By the way, although it is the connection structure of the reinforcement part 15 and the bumper face 11, as shown to Fig.4 (a), several thick part 15g is formed in the rear part of the lower surface part 15d of the reinforcement part 15, and the bumper face 11 is shown. It is fastened by the rear end portion 11c and the connecting member 18. As a result, not only the reinforcing portion 15 but also the lower portion 11b of the bumper face 11 is connected and supported by the shroud 2 (see FIG. 1).

As shown in FIG. 4B, the lower surface portion 15d of the reinforcing portion 15 reaching the thick portion 15g has a reinforcing convex portion 15h that protrudes upward. That is , since the lower surface portion 15d has a three-dimensional structure having walls in three directions at the front portion of the thick portion 15g that is a fastening portion with the rear end portion 11c of the bumper face 11, at the time of contact with the pedestrian The vicinity of the fastening part has a high strength structure that does not easily break.

The relationship between the upper portion of the rear end portion 11c of the lower portion 11b of the bumper face 11 and the reinforcing portion 15 is different from that shown in FIG. 4C in that the lower surface portion 15d of the reinforcing portion 15 is different from FIG. 4A. The thick portion 15g is not formed behind the rear portion, and is not fastened to the rear end portion 11c of the lower portion 11b of the bumper face 11. However, an engagement hole 14b (see FIG. 3) is provided in the drooping surface 14a formed above the reinforcing portion 15, and the engagement hole 14b is rearward from the upper surface portion 11d of the lower portion 11b of the bumper face 11. with the claw portion 11e is inserted extending claw portion 11e is formed on the rear end of the upper surface portion 15b of the reinforcing section 15, and is engaged with the claw engagement portion 15i is a lower surface of the engaging hole 14b . The shape of the claw portion 11e is being turned upside down, but it may also have a structure which is engaged to the mesh body 14 side.

Next, the structure of the shroud 2 and, for the support structure of the reinforcing portion 15 will be further described with reference to FIGS. 5-9. 5 is a bottom view showing a fastening state of the extending portion 16 of the reinforcing portion 15 and the shroud 2, FIG. 6 is a cross-sectional view taken along line DD in FIG. 5, and FIG. FIG. 8 is a front perspective view showing a fastening state between the projecting portion 17 of the extending portion 16 and the lower surface of the bulging portion 28 of the shroud 2, and FIG. 9 is an EE view in FIG. 8. FIG.

  As described above, the reinforcing portion 15 is fastened to the lower surface of the lower portion 23 of the shroud 2 with bolts 24B and nuts 24N at the fastening protrusions 16a on the left and right sides of the extension portion 16, as shown in FIGS. Has been. Specifically, the bolt 24 </ b> B is inserted into the bolt hole 16 b of the fastening protrusion 16 a and the bolt hole 23 a formed in the lower surface of the lower portion 23, and is tightened with a nut 24 </ b> N from the upper surface of the lower portion 23.

  Since the shroud 2 is originally a member having high rigidity to support the radiator 3 (see FIG. 7), the reinforcing portion 15 of the bumper mesh 12 is attached to the lower portion 23 of the shroud 2 by the extending portion 16 as described above. By directly fastening, it is possible to obtain high support rigidity in the bumper mesh 12 including the reinforcing portion 15. Therefore, the displacement of the reinforcing portion 15 can be suppressed during contact with a pedestrian during traveling of the vehicle, and the connecting member such as the under cover, which is required in the conventional technology, can be omitted, thereby increasing the number of parts. The leg-paying performance can be improved without any problems.

In FIG. 6, in the rear of the shroud 2, and member 4 located behind the fastening portion between the lower portion 23 and the fastening projection 16a extends across the vehicle width direction, the vehicle body of the left and right side frames ( It is a cross member that bridges between (not shown). By fastening the extending portion 16 with the shroud 2 positioned in front of the cross member 4 instead of the cross member 4, the length of the extending portion 16 itself is suppressed to be short.

Incidentally, as in this embodiment, if the shroud 2 is made of resin, as shown in FIG. 5, in the lower surface of the lower portion 2 3 of the shroud 2, a large number of irregularities rib-like that formed part Thus, the support portion 25 having a higher cross-sectional rigidity than the others is formed. Therefore, in the present embodiment, the fastening protrusion 16a is fastened to a portion adjacent to the support portion 25 having a high cross-sectional rigidity.

  An insertion hole 26 is formed in the center portion of the support portion 25. As shown in FIG. 7, the insertion hole 26 has two rods provided at the lower portion of the radiator 3 as a heat exchanger. Although not shown in FIGS. 1 and 6 for convenience, the radiator 3 is rubber-mounted on the lower portion 23 of the shroud 2 via a mount rubber 32 attached to the rod 31. ing.

  The radiator 3 is provided with a bar 33 extending upward corresponding to the bar 31, and the bar 33 is fitted in an insertion hole 27 formed in the upper portion 21 of the shroud 2. .

Incidentally, as the radiator 3, a known one including a side tank 3 6 on one side, a radiator core 35, and a side tank 36 on the other side is used.

  Thus, the support rigidity of the radiator 3 is improved by supporting the radiator 3 with the support section 25 having a higher cross-sectional rigidity than the others in the lower section 23 of the shroud 2.

Further, in the present embodiment, the bumper mesh 12 including the reinforcement portion 15 is formed without forming a dedicated reinforcement portion by fastening the fastening protrusion 16a of the extension portion 16 to a portion adjacent to the support portion 25. also the supporting rigidity Ru can be improved.

In the present embodiment, the lower portion 23 of the shroud 2, the support portions 25 are formed on both sides, One or at extension 16, both sides of the extending portion 16 corresponding to the supporting portion 25 Fastening protrusions 16a are formed on the portions, and each is fastened with a bolt 24B and a nut 24N.

  As described above, by fastening the fastening protrusions 16a formed on the left and right side portions of the extending portion 16 to the both side portions of the lower portion 23 of the shroud 2, the two fastening portions are separated from each other in the vehicle width direction. Therefore, the support state of the reinforcing portion 15 by the lower portion 23 of the shroud 2 can be stabilized as compared with the case where the fastening portion is provided closer to the center portion.

  Further, in the state in which the extending portion 16 is fastened to the lower portion 23 of the shroud 2, the protruding portion 17 at the center portion of the extending portion 16 is formed on the lower portion 23 of the shroud 2 as shown in FIGS. 8 and 9. It protrudes upward from the lower surface and is in contact with the front side of the lower portion 23.

  The lower portion 23 of the shroud 2 is formed with a bulging portion 28 that bulges forward at a position above the lower surface of the lower portion 23. A convex surface 23c protruding to the bottom is formed at the bottom. And in the fastening state of the extension part 16 and the lower part 23 of the shroud 2, it exists in the state which the upright surface 17b of the protrusion part 17 contact | abutted to this convex surface 23c.

  Further, in the bulging portion 28, a tunnel portion 28b is formed at the center in the vehicle width direction of the lower portion 23 of the shroud 2, and a nut member 29N having a U-shaped cross section is welded to the inner wall of the tunnel portion 28b. ing.

  Then, a bolt 29B is inserted into a bolt hole 17a drilled in the projecting portion 17 and a bolt hole 28a drilled in a lower portion of the bulging portion 28, and is tightened by a nut member 29N. It is concluded to.

  Thereby, at the time of contact with a pedestrian, since the center part of the extension part 16 can be stretched by the lower part 23 of the shroud 2 by the protrusion part 17, the leg-paying performance can be further improved.

  Moreover, since the protrusion part 17 is a site | part injection-molded convexly when shape | molding the extension part 16 which consists of resin materials, it is a site | part which has high rigidity, although it is a simple structure. Therefore, the manufacturing cost of the reinforcement part 15 which has the extension part 16 can be reduced. Furthermore, since the protrusion part 17 is formed so that it may extend in the front-back direction of the extension part 16, it will have high rigidity with respect to the load from the front at the time of contact with a pedestrian.

  Furthermore, not only the protrusion 17 contacts the lower portion 23 of the shroud 2 but also, as described above, by fastening the extending portion 16 to the lower surface of the bulging portion 28 of the lower portion 23 of the shroud 2, The improvement of the supporting rigidity of the bumper mesh 12 including the reinforcing portion 15 and the improvement of the stretching performance of the lower portion 23 with respect to the central portion of the extending portion 16 at the time of contact with the pedestrian can be achieved.

  Here, the bumper structure 1 is assembled to the vehicle body through a process of fastening the extending portion 16 to the lower portion 23 of the shroud 2. The bumper structure 1 includes the mesh body 14 and the reinforcing portion 15. A bumper face 11 is assembled in advance to a bumper mesh 12 made of a unit. The unitized bumper structure 1 is guided from the front of the vehicle body and enters the fastening process. At the time of guiding the bumper structure 1, as shown by a two-dot chain line in FIG. 10, the extension portion 16 is slid on the guide surface 16 c at the tip of the fastening protrusion 16 a to the front side of the lower portion of the shroud 2. The (bumper structure 1) can be guided to a predetermined height position in the front portion of the vehicle body, and the extending portion 16 can be reliably guided to the lower surface of the lower portion 23 of the shroud 2. Therefore, the assembly performance of the extended portion 16 with respect to the lower portion 23 is improved by the guide surface 16c.

  In the above-described embodiment, the projecting portion 17 is formed at the center of the extending portion 16 while fastening both side portions of the extending portion 16 to the lower surface of the lower portion 23 of the shroud 2 by the fastening projecting portion 16a. Although the protruding portion 17 is fastened to the lower surface of the bulging portion 28, the structure is not necessarily limited thereto. For example, it is good also as a structure which forms the site | part corresponded to the protrusion part 17 of embodiment mentioned above in the both sides of the extension part 16, and fastens to the lower surface of the both sides of the bulging part 28 by the side of the lower part 23 of the shroud 2. .

In correspondence between the configuration of the present invention and the above-described embodiment,
The heat exchanger of the present invention corresponds to the radiator 3,
Similarly,
The heat exchanger support part also corresponds to the supporting portion 25,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

The front perspective view which shows the front part structure of the motor vehicle which concerns on embodiment of this invention. The side view which shows the bumper structure in the front part structure of the motor vehicle which concerns on embodiment of this invention. (A) The rear perspective view which shows a bumper mesh among the bumper structures in FIG. 1, (b) The front view which shows a bumper mesh. (A) AA cross-sectional view taken along line AA in FIG. 3 (a), (b) A cross-sectional view taken along line BB in (a), (c) A cross-sectional view taken along line CC in FIG. 3 (a). Figure. The bottom view which shows the fastening state of the extension part of a bumper face lower reinforcement part, and a shroud. The DD sectional view taken on the line in FIG. Sectional drawing which shows the state which attached the radiator to the shroud. The front perspective view which shows the fastening state of the protrusion part of an extension part, and the lower surface of the bulging part of a shroud. FIG. 9 is a cross-sectional view taken along line EE in FIG. 8. Explanatory drawing which shows the process of assembling a bumper structure to a shroud.

2 ... shroud
11 ... Bumper face
11a ... Upper part
11b ... Lower part 12 ... Bumper mesh
13 ... Opening
14 ... mesh body 15 ... bumper face lower reinforcing portion 16 ... extending portion 17 ... projecting portion
21 ... Upper part
22 ... Side part
23 ... Lower part 25 ... Support part (heat exchanger support part)
28 ... bulge part

Claims (6)

In the front structure of the car,
Bumper face ,
A shroud having a lower portion disposed behind the bumper face,
The bumper face is composed of an upper part and a lower part ,
A bumper face lower reinforcing portion that is positioned inside the lower portion of the bumper face and is fastened to the lower end of the lower portion ,
Provided extending portion extending either et rearward the bumper face lower reinforcing portion,
Fasten the extension to the lower part of the shroud ,
The shroud is a resin shroud composed of an upper portion, a side portion, and a lower portion, and the upper portion, the side portion, and the lower portion are formed in a substantially rectangular shape having a predetermined width in the vehicle front-rear direction,
Heat exchanger support portions having higher cross-sectional rigidity than other portions are formed on both sides of the lower portion of the shroud, and the heat exchanger support portions extend from the side portion to the vehicle width direction inner side in the lower portion of the shroud. Established,
Fastening parts in the extension part of the bumper face lower reinforcing part are provided at both ends in the vehicle width direction, are both ends of the lower part of the shroud, and the vehicle width direction of the heat exchanger support part Fastened inside,
The front structure of an automobile, wherein the bumper face lower reinforcing portion is disposed inward of a cross section of the lower portion of the bumper face . The automobile front structure according to claim 1 , wherein the bumper face has an opening formed between an upper portion and a lower portion . Bumper mesh is provided,
The automobile front structure according to claim 2, wherein the bumper mesh includes a mesh main body located in the opening and the bumper face lower reinforcing portion . The extending portion extends rearward from the lower end of the bumper face lower reinforcing portion,
It entered into both sides of the upper Kinobede part to the lower surface of the lower portion of the upper Symbol shroud,
4. The front structure of an automobile according to claim 3, wherein a protruding portion that protrudes upward from the lower surface of the lower portion of the shroud and extends in the front-rear direction is formed at the center of the extending portion. Forming a bulging portion bulging forward at a position above the lower surface of the lower portion in the lower portion of the shroud;
5. The front structure of an automobile according to claim 4, wherein the protruding portion is fastened to the lower surface of the bulging portion. Vehicle width direction central portion of the lower portion of the shroud, wherein in the extending portion the vehicle front portion than the fastening portion of the bumper face lower reinforcing portion extending portion and fastened by being <br/> claims 1 to 5 The front structure of the automobile according to any one of the above.

Images