JP5692025B2 - Rear bumper structure - Google Patents

Description

  The present invention relates to a rear bumper structure.

  Generally, a rear bumper of an automobile includes a rear bumper reinforcement that is a skeleton member supported by a pair of left and right bumper stays, a rear bumper cover that forms a design surface, and a rear bumper absorber disposed between the two. . In a light rear collision (hereinafter simply referred to as “light rear collision”), the rear rear bumper absorber mainly absorbs energy by elastic deformation.

  However, for example, in the case of a so-called rear short overhang vehicle where the distance from the rear wheel to the rear end of the vehicle body is short, the rear bumper has a small protrusion margin (thickness) from the rear end of the vehicle body. The allowable displacement stroke of the absorber may be exceeded. In this case, it is conceivable that equipment such as a body panel such as a back door disposed at the rear end of the vehicle body, a rear wiper, and a rear license plate lamp interfere with the flat barrier, and these collision objects are deformed or damaged.

  On the other hand, as disclosed in the following Patent Document 1, there is also an automobile that does not include the above-described rear bumper absorber. Briefly, in this automobile, reflectors (reflectors) are provided at both ends of the rear bumper cover in the vehicle width direction, and protective brackets are provided at both ends of the rear bumper reinforcement in the vehicle width direction to protect the reflectors. It has been. Moreover, the recessed part dented toward the vehicle front side is formed in the intermediate part of the height direction of a protective bracket, and the main-body part of a reflecting plate is accommodated in the recessed part with the clearance gap. Further, a vertical wall portion with which the rear bumper cover abuts at the time of a light rear collision is formed on the upper and lower portions of the protective bracket in the height direction.

  According to the above configuration, the rear bumper cover comes into contact with the vertical wall portion of the protective bracket during a light rear collision, but the main body portion of the reflecting plate does not bottom out in the concave portion of the protective bracket. Thereby, the reflector can be protected.

  However, according to the above prior art, since metal protective brackets are disposed on both sides of the rear bumper cover, there is a disadvantage that the weight of the vehicle body increases.

JP 2008-094234 A

  To summarize the above, in vehicles such as rear short overhanging cars, there are equipment such as body panels such as back doors, rear wipers, rear license plate lamps, reflectors (reflectors) at the time of a light rear collision with a flat barrier. It is desirable to prevent deformation or breakage. Furthermore, it is desirable not to configure the vehicle body weight as a countermeasure.

  In consideration of the above facts, the present invention can protect the body panel and the equipment disposed at the rear end of the vehicle body and can reduce the weight of the vehicle body as much as possible when it is lightly bumped. Is the purpose.

  The rear bumper structure according to the first aspect of the present invention is supported by bumper stays provided on the left and right sides of the rear part of the vehicle body, and has a curved center portion in the vehicle width direction that swells to the rear side of the vehicle from both ends in plan view. A rear bumper reinforcement formed in a shape, a rear bumper cover disposed on the rear side of the rear bumper reinforcement, covering the rear bumper reinforcement from the rear side of the vehicle, and further having reflectors disposed on left and right corners; The rear bumper reinforcement is arranged at both ends in the vehicle width direction and is made of an elastic material, and the rearmost portion is arranged on a straight line along the vehicle width direction passing through the central rear end of the rear bumper reinforcement in plan view. And an absorber.

  A rear bumper structure according to a second aspect of the present invention is the rear bumper structure according to the first aspect of the present invention, wherein the absorber is attached to the rear bumper reinforcement in an assembled state to the rear bumper reinforcement from the outer end in the vehicle width direction. It is configured to include an overhang portion that overhangs.

  A rear bumper structure according to a third aspect of the present invention is the mounting seat surface according to the first or second aspect, wherein the reflection plate is attached to the corner portion of the rear bumper cover by being recessed toward the rear bumper reinforcement side. Is formed, and the protruding portion of the absorber is formed with a second recess that can receive the first recess in the rear bumper cover.

  A rear bumper structure according to a fourth aspect of the present invention is the rear bumper structure according to the first aspect, wherein the absorber is interposed between the rear bumper reinforcement and the rear bumper cover in an assembled state to the rear bumper reinforcement. A main body having a predetermined thickness.

  A rear bumper structure according to a fifth aspect of the present invention is the rear bumper structure according to the second or third aspect of the present invention, wherein the absorber is attached to the rear bumper reinforcement in a state of being assembled to the rear bumper reinforcement. A main body having a predetermined thickness interposed therebetween is provided.

  A rear bumper structure according to a sixth aspect of the present invention is the rear bumper structure according to the fifth aspect of the present invention, wherein the rear bumper reinforcement has a rear end edge between the rear end portion and the first concave portion of the rear bumper cover. A connecting portion that connects the main body portion and the overhang portion is interposed.

  The rear bumper structure according to a seventh aspect of the present invention is the rear bumper structure according to any one of the first to sixth aspects, wherein the rear bumper reinforcement has a hollow portion extending along a longitudinal direction thereof. The absorber is formed with an insertion portion for being inserted into the hollow portion of the rear bumper reinforcement.

  The rear bumper structure according to an eighth aspect of the present invention is the rear bumper structure according to the seventh aspect, wherein the insertion portion has a prismatic shape, and at least two surfaces of the insertion portion interfere when inserted into the hollow portion. A plurality of interference units are set.

  According to the first aspect of the present invention, at the time of a light rear collision, for example, when the vehicle collides with a flat barrier, the flat barrier first contacts the rear bumper cover, deforms it, and then the center rear of the rear bumper reinforcement. Abuts the end. Here, in the present invention, on the straight line along the vehicle width direction passing through the central rear end portion of the rear bumper reinforcement, the rearmost portions of the absorbers disposed at both ends of the rear bumper reinforcement in the vehicle width direction are arranged. Yes. For this reason, the flat barrier comes into contact with the central rear end portion of the rear bumper reinforcement and the rearmost portions of the left and right absorbers substantially simultaneously. That is, the central rear end portion and the pair of left and right rearmost portions receive a flat barrier at substantially the same timing. For this reason, since the three are simultaneously deformed toward the front side of the vehicle in response to the load input from the flat barrier, the load at the initial stage of the light rear-end collision can be quickly raised, and the displacement stroke is suppressed. As a result, interference with the body panel disposed at the rear end of the vehicle body and the equipment that is a collision object is suppressed or eliminated. And since it is not the structure which provides a metal protection bracket like a prior art, a vehicle body weight is reduced compared with a prior art.

  According to the second aspect of the present invention, since the absorber is provided with the overhanging portion that protrudes from the outer end portion of the rear bumper reinforcement in the vehicle width direction, at the time of a light rear-end collision from an oblique direction, The overhang portion can be bent toward the front side of the vehicle. Thereby, the energy at the time of the light rear-end collision from the diagonal direction is absorbed.

  According to the third aspect of the present invention, the first recess is formed in the corner portion of the rear bumper cover, and the reflector is attached to the mounting seat surface of the first recess. Correspondingly, a second recess is formed in the overhang portion of the absorber, and the first recess is received in the second recess. Therefore, at the time of a light rear-end collision from an oblique direction, when the overhang portion of the absorber is bent toward the front side of the vehicle and absorbs energy, it is possible to suppress or prevent the reflection plate from being damaged due to interference with the barrier as much as possible.

  According to the fourth aspect of the present invention, in the first aspect of the invention, since the absorber includes the main body portion having a predetermined thickness between the rear bumper reinforcement and the rear bumper cover, the main body portion is crushed. By being compressed, predetermined energy absorption is performed. For this reason, the input of the collision reaction force to the reflector is further reduced.

  According to the fifth aspect of the present invention, in the second or third aspect of the invention, the absorber includes the main body portion having a predetermined thickness between the rear bumper reinforcement and the rear bumper cover. Is obtained. That is, energy is absorbed by the overhanging portion elastically deforming toward the front side of the vehicle in the early stage of light rear collision from an oblique direction, and energy is absorbed by the main body portion being crushed toward the front side of the vehicle in the later stage of light rear collision. The And if a collision load is removed, a main-body part will be decompress | restored by an elastic restoring force, and a reflecting plate will be arrange | positioned in the original position in connection with it.

  According to the sixth aspect of the present invention, since the connecting portion is interposed between the edge of the rear end portion of the rear bumper reinforcement on the outer side in the vehicle width direction and the first concave portion of the rear bumper cover, When the overhanging portion is sometimes bent, the mounting seat surface of the first recess is not buckled by receiving a reaction force from the edge.

  According to the seventh aspect of the present invention, the rear bumper reinforcement has a hollow portion at the outer end in the vehicle width direction, and the absorber is inserted into the hollow portion by inserting the insertion portion formed in the absorber into the hollow portion. Assembled to.

  According to the eighth aspect of the present invention, since the insertion portion has a prismatic shape, and a plurality of interference portions are set on at least two surfaces, the insertion portion is provided when the absorber is assembled to the rear bumper reinforcement. If it press-fits in a hollow part, a some interference part will be elastically deformed and will be in an assembly | attachment state.

  As described above, the rear bumper structure according to the first aspect of the present invention can protect the body and equipment disposed at the rear end portion of the vehicle body when it is lightly bumped, and can further reduce the weight of the vehicle body. It has the outstanding effect that it can suppress as much as possible.

  The rear bumper structure according to the second aspect of the present invention has an excellent effect that the reflector can be protected during a light rear-end collision from an oblique direction.

  The rear bumper structure according to the third aspect of the present invention has an excellent effect that the light distribution performance of the reflecting plate can be maintained substantially satisfactorily even when the rear bumper structure is lightly bumped from an oblique direction.

  The rear bumper structure according to the fourth aspect of the present invention can suppress the damage given to the reflector as much as possible when the rear bumper structure is slightly rearwardly projected from an oblique direction, and can maintain the light distribution performance of the reflector satisfactorily. It has an excellent effect.

  The rear bumper structure according to the present invention described in claim 5 effectively protects the reflector plate from the initial stage to the latter half of the collision when the rear bumper structure is lightly projected from an oblique direction, and further improves the light distribution performance of the reflector plate. It has an excellent effect that it can be maintained better.

  The rear bumper structure according to the present invention described in claim 6 has an excellent effect that the light distribution performance of the reflector can be maintained well by protecting the mounting seat surface of the reflector from the edge of the rear bumper reinforcement. .

  The rear bumper structure according to the present invention described in claim 7 has an excellent effect that the workability of assembling the absorber can be improved.

  The rear bumper structure according to the present invention according to claim 8 has an excellent effect that the mounting state of the absorber can be stabilized.

It is a top view which shows the whole structure of the rear bumper structure which concerns on this embodiment. FIG. 2 is an enlarged schematic side view showing a rear portion of a vehicle to which the rear bumper structure shown in FIG. 1 is applied. (A) is an enlarged rear view showing a state in which a reflector is attached to the rear bumper cover shown in FIG. 2, and (B) is a perspective view showing a state in which the reflector is removed from the rear bumper cover. It is an expansion perspective view which shows the state with which the absorber was mounted | worn with the rear bumper reinforcement from the back side. It is an expansion perspective view which shows the state before attaching an absorber to a rear bumper reinforcement from the front side. It is an expansion perspective view which shows the state with which the absorber was mounted | worn with the rear bumper reinforcement from the front side. FIG. 7 is an enlarged longitudinal sectional view showing an insertion state of an absorber insertion portion into a hollow portion of a rear bumper reinforcement in a state cut along a line 7-7 in FIG. 6. It is a top view corresponding to FIG. 1 which shows the whole structure of the rear bumper structure which concerns on contrast. (A) is a cross-sectional plan view showing a state of an initial rear collision from an oblique direction, and (B) is a cross-sectional plan view showing a state of the latter half of the rear collision. It is a plane sectional view which shows a mode when it is rear-projected from the diagonal direction when the absorber of this embodiment is not provided.

  Hereinafter, an embodiment of a rear bumper structure according to the present invention will be described with reference to FIGS. Note that an arrow FR appropriately shown in each figure indicates the vehicle front side, and an arrow UP indicates the vehicle upper side. Furthermore, the arrow IN indicates the inner side in the vehicle width direction.

  First, an outline of a rear short overhang vehicle to be described as an embodiment of the present invention will be given. As shown in FIG. 2, in the rear short overhang vehicle 10, the distance L from the center of the rear wheel 12 to the rear end of the vehicle is shorter than that of a normal four-door sedan passenger car. Further, in the rear short overhanging vehicle 10, the protruding amount M of the rear bumper 16 from the back door 14 is set to be relatively small. A rear wiper 18 is illustrated adjacent to the outside of the door glass of the back door 14, and a rear license plate lamp 20 is illustrated below the rear wiper 18.

  Next, the configuration of the rear bumper structure according to the present embodiment will be described in detail. In the following description, when there is no need to clearly indicate that the vehicle is a rear short overhang vehicle, the same reference numeral is used and it is simply referred to as “vehicle 10”.

  As shown in FIG. 1, the rear bumper 16 includes a pair of left and right rear bumper stays 22, a rear bumper reinforcement 24, a rear bumper cover 26, and a pair of left and right absorbers 28. Hereinafter, it demonstrates in order. On the left and right sides of the rear part 30 of the vehicle body, a pair of left and right rear bumper stays 22 each having a rectangular tube shape is disposed. Each rear bumper stage 22 is configured as a metal member arranged with the longitudinal direction of the vehicle as a longitudinal direction, and the front end portion (rear end portion) is closed by a plate (not shown). A metal rear bumper reinforcement 24 is bridged between the tip ends of these rear bumper stays 22. The rear bumper reinforcement 24 is a long member disposed with the vehicle width direction as a longitudinal direction, and is formed in a curved shape in which a central portion in the vehicle width direction swells to the vehicle rear side from both ends in plan view. Yes. Further, as shown in FIGS. 5 and 7, the rear bumper reinforcement 24 has a vertical cross-sectional shape of approximately “8” in which two hollow portions 32 and 34 each formed in a rectangular shape are spaced apart vertically. It has a shape of A rib 36 having an arcuate cross section protruding upward is formed in the center of the top wall portion of the upper hollow portion 32 over the entire length of the rear bumper reinforcement 24.

  Returning to FIG. 1, a resin-made rear bumper cover 26 is disposed on the rear side of the rear bumper reinforcement 24 to cover the rear bumper reinforcement 24 from the rear side of the vehicle. The rear bumper cover 26 is formed in a curved shape along the rear bumper reinforcement 24 in plan view, and further extends to the side of the vehicle body via the left and right corner portions 26A. As shown in FIG. 3B, the corner portion 26A of the rear bumper cover 26 has a first concave portion 40 formed in a truncated cone shape having a mounting seat surface 38 composed of a bottom surface 38A and an inner peripheral surface 38B. Is formed. A bolt insertion hole (not shown) is formed at the center of the bottom surface 38 </ b> A of the mounting seat surface 38. As shown in FIG. 3A, a disc-shaped reflector (reflector) 42 is attached to the first recess 40. Specifically, a stud bolt (not shown) is erected at the center of the back surface of the reflecting plate 42. After inserting the stud bolt into the bolt insertion hole on the bottom surface 38A of the mounting seat surface 38, the stud bolt is inserted from the opposite side. The reflection plate 42 is attached in the first recess 40 by screwing a nut (not shown).

  Returning to FIG. 1, absorbers 28 made of an elastic material (for example, a soft resin foam or a hollow resin molded body) are attached to both ends of the rear bumper reinforcement 24 in the vehicle width direction. That is, the absorber 28 according to the present embodiment is not an absorber that extends over the entire length along the rear surface of the rear bumper reinforcement 24 but a partial absorber that exists only at the left and right ends of the rear bumper reinforcement 24. Has been.

  As shown in FIGS. 4 to 6 and 9, the absorber 28 is formed in a substantially rectangular parallelepiped block shape. The absorber 28 is assembled to the rear bumper reinforcement 24, and has a main body 44 having a predetermined thickness interposed between the rear surface 24A of the rear bumper reinforcement 24 and the rear bumper cover 26, and the vehicle width of the rear bumper reinforcement 24. A projecting portion 46 projecting further outward than the end portion on the outer side in the direction. A substantially rectangular through-hole 50 is formed in the upper portion of the main body 44 in the rear view. The overhanging portion 46 is formed with a second recess 52 that is recessed toward the front side of the vehicle and can receive the first recess 40 described above. The second recess 52 has a bottom surface 52A and an inner peripheral surface 52B formed in a U shape in a rear view, and an end on the outer side in the vehicle width direction is open. A central recess 54 is further formed in the center of the second recess 52 so as to be recessed in a keyhole shape toward the front side of the vehicle. The central recess 54 is used as a relief for avoiding interference with the above-described stud bolt and nut for fixing the reflection plate 42 and a clip or the like when temporarily fixing the reflection plate 42 during assembly.

  In addition, a protruding portion 56 that protrudes toward the front side of the vehicle is integrally formed at the center portion on the back side (that is, the front side of the vehicle) of the overhang portion 46. When the raised portion 56 is viewed in a plan view, the thickness in the front-rear direction of the outer portion in the vehicle width direction is the thinnest, and the thickness in the front-rear direction gradually increases toward the inner side in the vehicle width direction. Further, a rectangular parallelepiped block-shaped insertion portion 58 is continuously and integrally formed from the upper portion of the end portion of the raised portion 56 on the inner side in the vehicle width direction. The insertion portion 58 extends in parallel to the main body portion 44 and toward the inner side in the vehicle width direction. Therefore, the insertion portion 58 is exposed in the through hole 50 formed in the main body portion 44. Thus, the insertion state of the insertion portion 58 into the upper hollow portion 32 of the rear bumper reinforcement 24 is visible from the vehicle rear side of the absorber 28. The tip of the insertion part 58 is chamfered.

  At the center of the rear surface 58A of the insertion portion 58, a single convex portion 60 is formed as an interference portion protruding toward the main body portion 44 side (through hole 50 side). Further, as shown in FIG. 7, the upper surface 58B of the insertion portion 58 is horizontally disposed, whereas the lower surface 58C is an inclined surface that inclines toward the vehicle lower side from the rear end toward the front end. Therefore, the front end side of the lower surface 58C is positioned at the lowest side of the vehicle. Hereinafter, this portion is referred to as “lowermost portion 62”. The dimension H in the height direction of the insertion part 58 at the lowermost part 62 as the interference part is set to be slightly larger than the dimension h in the height direction of the hollow part 32 on the upper side of the rear bumper reinforcement 24. . Therefore, when the insertion portion 58 is to be inserted into the upper hollow portion 32, the lowermost portion 62 of the insertion portion 58 is caught by the lower wall 32 </ b> A of the upper hollow portion 32 and the convex portion 60 is the rear wall of the rear bumper reinforcement 24. It is designed to be caught by the part 32B (interference design).

  Further, as shown in FIG. 9A, in the assembled state of the absorber 28, between the edge 64 at the rear end portion of the rear bumper reinforcement 24 in the vehicle width direction and the first recess 40 of the rear bumper cover 26. A connecting portion 66 that connects the main body portion 44 and the second concave portion 52 of the overhang portion 46 is interposed.

  Further, as shown in FIG. 1, in the assembled state of the absorber 28, the rearmost portions 28 </ b> A of the left and right absorbers 28 are located on a straight line P along the vehicle width direction passing through the central rear end 24 </ b> B of the rear bumper reinforcement 24. Each is arranged. That is, the central rear end portion 24B and the pair of left and right rearmost portions 28A are arranged on a straight line. However, it is not necessary that the three are positioned in a "straight line" in a strict sense, and an aspect in which there is some variation within the range in which the operation and effect of the present embodiment to be described later can be obtained is also included in the present invention. In FIG. 1, the straight line P and a flat barrier 72 described later are indicated by the same two-dot chain line.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  FIG. 8 shows a rear bumper structure as a comparative example. As shown in this figure, in the rear bumper structure according to the comparative example, an absorber 70 longer than the rear bumper reinforcement 24 is disposed between the rear bumper reinforcement 24 and the rear bumper cover 26. When this vehicle collides with the flat barrier 72 with a slight rear impact, the central portion 70A of the absorber 70 is crushed and the energy at the time of the collision is absorbed in the initial stage of the collision. The load transmission path at this time is indicated by an arrow F2 in FIG. In the second half of the collision, the rear bumper reinforcement 24 is deformed from the solid line illustrated state to the two-dot chain line illustrated state, so that the energy at the time of the collision is absorbed. As a result, in the case of a vehicle having a proportional rear bumper structure, the rise of the load at the initial stage of the collision is slow and the displacement stroke increases. As a result, the intrusion amount of the flat barrier 72 is increased, and equipment such as the rear door plate 14 and the rear license plate lamp 20 and the rear wiper 18 which are colliding objects are deformed. Or may be damaged. In addition, when the reflecting plate 42 is arrange | positioned in the illustration position of FIG. 1, it will not receive much influence of the load input from a flat barrier. However, when the reflecting plate 42 is disposed at a position closer to the center in the vehicle width direction than the illustrated position in FIG. 1, it is considered that the reflecting plate 42 is affected by the load, and in that sense, included in the above-described equipment. It is.

  On the other hand, in the case of the vehicle 10 having the rear bumper structure according to the present embodiment, as shown in FIG. 1, the flat barrier 72 first contacts the rear bumper cover 26, and after this is deformed, the rear bumper reinforcement 24 abuts against the central rear end 24B. Here, in the present embodiment, the absorbers 28 disposed on both ends of the rear bumper reinforcement 24 in the vehicle width direction on a straight line P along the vehicle width direction passing through the central rear end 24B of the rear bumper reinforcement 24. The last part 28A is arranged. For this reason, the flat barrier 72 abuts substantially at the same time at the three positions of the central rear end portion 24B of the rear bumper reinforcement 24 and the rearmost portions 28A of the left and right absorbers 28. That is, the central rear end portion 24B and the pair of left and right rearmost portions 28A receive the flat barrier 72 at substantially the same timing. Accordingly, the three members are simultaneously deformed toward the front side of the vehicle in response to the load input from the flat barrier 72. The load transmission path at this time is indicated by an arrow F1 in FIG. For this reason, the load at the initial stage of the light rear-end collision can be quickly raised, and the displacement stroke is suppressed accordingly. As a result, interference with the body panel such as the back door 14 disposed at the rear portion of the vehicle 10 and the equipment as a collision object is suppressed or eliminated. Moreover, in the case of the rear bumper structure according to the present embodiment, since the metal protective bracket is not provided as in the prior art, the vehicle weight is reduced as compared with the prior art.

  In summary, the rear bumper structure according to the present embodiment can protect the body panel and equipment disposed at the rear end portion of the vehicle body when lightly bumped, and further suppress the vehicle body weight as much as possible. be able to.

  In the assembled state of the absorber 28 of the present embodiment, the main body portion 44 is interposed (sandwiched) between the rear bumper reinforcement 24 and the rear bumper cover 26, and the overhanging portion 46 is the vehicle width of the rear bumper reinforcement 24. It is a cantilever support structure that protrudes from the outer end in the direction. For this reason, when the barrier 74 is slightly rearwardly projected from the oblique direction to the corner portion 26A of the rear bumper cover 26 of the vehicle 10 of the present embodiment, the following operational effects are obtained. That is, as shown in FIG. 9A, in the initial stage of the collision, energy is absorbed by bending the overhanging portion 46 of the absorber 28 toward the vehicle front side. The load at this time is input from the first recess 40 of the rear bumper cover 26 to the second recess 52 of the absorber 28, and then transmitted from the overhang 46 to the rear bumper reinforcement 24 and the rear bumper stay 22 through the insertion portion 58. (The load transmission path at this time is indicated by F3.) As a result, according to the present embodiment, it is possible to protect the reflecting plate 42 at the time of a light rear collision from an oblique direction.

  More specifically, in the present embodiment, the first recess 40 is formed in the corner portion 26 </ b> A of the rear bumper cover 26, and the reflection plate 42 is attached to the mounting seat surface 38 of the first recess 40. Correspondingly, a second recess 52 is formed in the overhanging portion 46 of the absorber 28, and the first recess 40 is received in the second recess 52. Accordingly, when the overhanging portion 46 of the absorber 28 is bent toward the front side of the vehicle and absorbs energy during a light rear-end collision from an oblique direction, the reflector 42 is prevented or prevented from being damaged by interfering with the barrier 74 as much as possible. . Therefore, the light distribution performance of the reflecting plate 42 can be maintained substantially satisfactorily even when a light rear collision occurs from an oblique direction.

  On the other hand, in the rear bumper structure according to the present embodiment, the absorber 28 includes the main body 44 having a predetermined thickness between the rear bumper reinforcement 24 and the rear bumper cover 26, so that the main body 44 is crushed (compressed). Predetermined energy absorption. For this reason, the input of the collision reaction force with respect to the reflecting plate 42 is further reduced. As a result, according to the present embodiment, it is possible to suppress damage to the reflecting plate 42 as much as possible when the vehicle is lightly bumped from an oblique direction, and to maintain the light distribution performance of the reflecting plate 42 in a favorable manner.

  Particularly, in the latter half of the collision following the load transmission in the initial stage of the collision shown in FIG. 9A, energy is absorbed by the main body 44 of the absorber 28 being crushed toward the front side of the vehicle as shown in FIG. 9B. Is made. The load at this time is input from the rear bumper cover 26 to the main body 44 of the absorber 28 and then linearly transmitted to the rear bumper reinforcement 24 and the rear bumper stay 22 (the load transmission path at this time is indicated by F4). ). And if a collision load is removed, the main-body part 44 will be decompress | restored by an elastic restoring force, and the reflecting plate 42 will be arrange | positioned in the original position. As a result, according to the present embodiment, in the case of a light rear collision from an oblique direction, the reflector 42 is effectively protected from the initial stage to the latter half of the collision, and the light distribution performance of the reflector 42 is further improved. It can be maintained well.

  Furthermore, in the present embodiment, the connecting portion 66 is interposed between the rear end edge 64 of the rear bumper reinforcement 24 in the vehicle width direction and the first recess 40 of the rear bumper cover 26. When the overhanging portion 46 bends at the time of a collision, the mounting seat surface 38 of the first recess 40 does not buckle due to a reaction force from the edge 64. That is, as shown in FIG. 10, in the case of the rear bumper structure that does not include the absorber 28 of the present embodiment, the mounting seating surface 38 of the first recess 40 of the rear bumper cover 26 may be in strong contact with the edge 64 and buckled. Conceivable. However, in the case of the present embodiment, since the connecting portion 66 is interposed between the first recess 40 and the edge 64, the mounting seat surface 38 does not buckle. As a result, according to this embodiment, the light distribution performance of the reflector 42 can be maintained satisfactorily.

  Further, in the present embodiment, there are upper and lower hollow portions 32 and 34 at the end of the rear bumper reinforcement 24 on the outer side in the vehicle width direction, and the insertion portion 58 formed in the absorber 28 is inserted into the upper hollow portion 32. Thus, the absorber 28 is assembled to the rear bumper reinforcement 24. As a result, according to this embodiment, the workability of assembling the absorber 28 can be improved.

  Furthermore, in the present embodiment, the insertion portion 58 has a quadrangular prism shape, and a plurality of interference portions (the convex portion 60 and the lowermost portion 62) are set on at least two surfaces, so that the absorber 28 is connected to the rear bumper reinforcement 24. When the insertion portion 58 is press-fitted into the upper hollow portion 32 during assembly, the convex portion 60 and the lowermost portion 62 are elastically deformed to be in an assembled state. As a result, according to the present embodiment, the mounting state of the absorber 28 can be stabilized.

  In addition, in the present embodiment, the absorber 28 is disposed only at the corner portion 26A of the rear bumper cover 26, so that it is very small and lightweight as compared with the absorber 70 shown in FIG. Moreover, since the molding die used when manufacturing the absorber 28 can also be made small, the die cost can be reduced.

[Supplementary explanation of the above embodiment]
(1) In the above-described embodiment, the present invention is applied to the rear short overhanging vehicle 10, but the present invention is not limited to this, and the present invention may be applied to a vehicle having another vehicle body structure.

(2) Further, when the present invention described in claim 2 is regarded as an independent invention, it is as follows.
[Claim 1]
A rear bumper reinforcement that is supported by bumper stays provided on the left and right sides of the rear part of the vehicle body and that is formed in a curved shape in which the center in the vehicle width direction swells to the vehicle rear side from both ends in plan view;
A rear bumper cover that is disposed on the rear side of the rear bumper reinforcement and covers the rear bumper reinforcement from the rear side of the vehicle, and further includes reflectors disposed on the left and right corners;
The rear bumper reinforcement is disposed at both ends of the rear bumper reinforcement in the vehicle width direction and is made of an elastic material. When assembled to the rear bumper reinforcement, the rear bumper reinforcement extends beyond the outer end in the vehicle width direction. An absorber configured to include an overhang portion that exists,
Rear bumper structure having

Examples of problems to be solved by the invention according to claim 1 include the following.
In the case of a vehicle in which a reflector plate is provided at the corner of the rear bumper cover, if the rear bumper is lightly inclined from an oblique direction, the reflector plate may be damaged or the mounting seat surface may be deformed even if the reflector plate is not damaged. As a result, it is conceivable that the light distribution performance of the reflector is reduced.
Therefore, even in such a case, the technique disclosed in Patent Document 1 can be used as a measure for preventing the light distribution performance of the reflector from being impaired. However, according to this prior art, the weight of the vehicle body increases because the reflector is protected by using a metal protective bracket.
In consideration of the above facts, the present invention can maintain the light distribution performance of the reflector plate (substantially) well and can suppress the weight of the vehicle body as much as possible when it is lightly bumped from an oblique direction. Is the purpose.

  And according to the said invention, energy absorption of the collision initial stage is made | formed by the overhang | projection part bending. Thereby, a reflecting plate can be protected. In addition, since the reflector is protected by the structure of the absorber itself and no metal protective bracket is used, the weight of the vehicle body does not increase.

  In the case of the present invention, the rearmost portions 28A of the left and right absorbers 28 are not necessarily arranged on the straight line P along the vehicle width direction passing through the central rear end 24B of the rear bumper reinforcement 24. To the vehicle longitudinal direction.

(3) Further, in the above-described embodiment, the insertion portion 58 is formed integrally with the absorber 28 and is inserted into the upper hollow portion 32 of the rear bumper reinforcement 24 to be assembled. The structure may be such that the insertion portion is not provided, and the rear bumper reinforcement is fixed by fixing means such as a bolt.

10 Rear short overhang vehicle / vehicle 16 Rear bumper 22 Rear bumper stay 24 Rear bumper reinforcement 24B Central rear end portion 26 Rear bumper cover 26A Corner portion 28 Absorber 28A Last portion 32 Hollow portion 38 Mounting seat surface 40 First concave portion 42 Reflector plate 44 Main body portion 46 Overhang portion 52 Second concave portion 58 Insertion portion 60 Convex portion (interference portion)
62 Bottom (interference part)
64 edge 66 connecting part

Claims (8)

A rear bumper reinforcement that is supported by bumper stays provided on the left and right sides of the rear part of the vehicle body and that is formed in a curved shape in which the center in the vehicle width direction swells to the vehicle rear side from both ends in plan view;
A rear bumper cover that is disposed on the rear side of the rear bumper reinforcement and covers the rear bumper reinforcement from the rear side of the vehicle, and further includes reflectors disposed on the left and right corners;
The rear bumper reinforcement is arranged at both ends in the vehicle width direction and is made of an elastic material, and the rearmost portion is arranged on a straight line along the vehicle width direction passing through the central rear end of the rear bumper reinforcement in plan view. With the absorbed absorber,
Rear bumper structure having The absorber is configured to include an overhanging portion that protrudes from an outer end portion of the rear bumper reinforcement in the vehicle width direction in an assembled state to the rear bumper reinforcement.
The rear bumper structure according to claim 1. The corner portion of the rear bumper cover is formed with a first recess having a mounting seat surface that is recessed toward the rear bumper reinforcement side and to which the reflector is attached.
The overhanging portion of the absorber is formed with a second recess that can receive the first recess in the rear bumper cover.
The rear bumper structure according to claim 2. The absorber includes a main body portion having a predetermined thickness interposed between the rear bumper reinforcement and the rear bumper cover in an assembled state to the rear bumper reinforcement.
The rear bumper structure according to claim 1. The absorber includes a main body portion having a predetermined thickness interposed between the rear bumper reinforcement and the rear bumper cover in an assembled state to the rear bumper reinforcement.
The rear bumper structure according to claim 2 or claim 3. A connecting portion that connects the main body portion and the overhang portion is interposed between an edge of a rear end portion of the rear bumper reinforcement on the outer side in the vehicle width direction and the first recess portion of the rear bumper cover.
The rear bumper structure according to claim 5. The rear bumper reinforcement has a cross-sectional shape having a hollow portion extending along its longitudinal direction,
In the absorber, an insertion part for being inserted and assembled in the hollow part of the rear bumper reinforcement is formed.
The rear bumper structure according to any one of claims 1 to 6. The insertion portion has a prismatic shape,
A plurality of interference portions that interfere when inserted into the hollow portion are set on at least two surfaces of the insertion portion,
The rear bumper structure according to claim 7.

Images