JP6094529B2 - Structure of the lower rear of the car - Google Patents

Description

  The present invention relates to a rear lower side of an automobile, specifically, a rear bumper and a structure around the rear bumper.

  For example, Patent Document 1 and Patent Document 2 disclose measures for improving aerodynamic characteristics in the structure of the rear lower part of an automobile.

  Patent Document 1 discloses a rear bumper in which an opening extending in the vehicle width direction is formed. Air resistance is reduced by allowing air to flow through the opening during traveling.

  In Patent Document 2, a spare tire pan that bulges downward (portion for storing a spare tire) is provided in a portion of the rear floor panel that constitutes the floor of the luggage compartment. A covering rear rear undercover is disclosed.

  The rear end of the bottom surface of the rear rear under cover is located substantially in contact with the lower end of the rear bumper, and the installation of the rear rear under cover suppresses the turbulence of the traveling wind that flows below the rear floor panel.

JP 2006-123799 A JP 2012-66764 A

  Since the rear bumper is an exterior component, forming an opening in the rear bumper as in Patent Document 1 greatly affects the appearance design of the automobile. For this reason, applicable vehicle types are limited, and the formation of a horizontally long opening is disadvantageous in that the strength of the rear bumper tends to decrease.

  Since the rear rear under cover of Patent Document 2 is provided only in a part of the rear floor panel, traveling wind enters the rear bumper from other parts. If the rear rear under cover is expanded in the vehicle width direction, the entry of the traveling wind can be suppressed, but since a silencer that generates high heat is arranged beside the spare tire pan, the expansion of the rear rear under cover is It is difficult in practice.

  Therefore, even if the rear rear under cover is installed as in Patent Document 2, air may enter the rear bumper and cause air resistance. In particular, a large air resistance is likely to occur during acceleration. This point will be specifically described with reference to FIG.

  FIG. 1 schematically shows a cross-sectional structure of a peripheral portion of a rear bumper 105 and a silencer 100 of a conventional automobile. In FIG. 1, reference numeral 101 denotes a rear floor panel, and a wall-like rear end panel 102 extending in the vehicle width direction is erected at the rear end of the rear floor panel 101. A rear end member 103 is provided in a cylindrical shape on the rear end panel 102.

  A rear bumper reinforcement 104 is disposed along the rear end panel 102 behind the rear end panel 102. A resin bumper 105 is attached so as to cover the rear bumper reinforcement 104 and the rear end panel 102 from behind.

  When traveling, the silencer 100 generates high heat. Therefore, the rear bumper 105 cannot be attached to the silencer 100, and the rear bumper 105 needs to be installed at a certain distance from the silencer 100, and a space is inevitably generated between the silencer 100 and the lower part of the rear bumper 105. End up.

  Therefore, when the rear bumper 105 protrudes downward from the rear end panel 102, a part of the traveling wind that is caught behind the silencer 100 during traveling travels into the rear bumper 105 through the opening between the rear end panel 102 and the rear bumper 105. Get in.

  Since the upper part of the rear bumper 105 has a bag path shape, air resistance is generated. In particular, during acceleration, since air enters the rear bumper 105 at once, a large air resistance is likely to occur.

  Therefore, a main object of the present invention is to effectively suppress an increase in air resistance due to a traveling wind entering the rear bumper without forming an opening in the rear bumper at the expense of the appearance design.

  The rear lower structure of the disclosed automobile includes a rear floor panel that extends to the rear part of the vehicle body and forms a floor of the passenger compartment, and a rear end panel that extends in the vertical direction from the rear end of the rear floor panel and extends in the vehicle width direction. , A vehicle body lower installation member installed below the rear floor panel, and a rear bumper that covers the vehicle body rear structure from the rear.

  The rear bumper includes an upper wall portion that is attached along an upper end portion of the rear end panel, an intermediate wall portion that extends to the rear of the rear end panel and extends to the rear wall, and the rear end that extends to the rear wall. And a lower wall portion that extends downward from the lower end portion of the panel.

  An opening facing forward is formed between a lower end portion of the lower wall portion and a lower end portion of the rear end panel. The vehicle body installation member is disposed farther forward than the lower wall portion in a state where the bottom surface is located below the lower end portion of the lower wall portion. And the wind-shielding member which protrudes to the said opening is provided in the lower end part of the said lower wall part.

  That is, in this lower structure of the rear part of the automobile, an opening facing the front is formed between the lower end part of the rear bumper and the lower end part of the rear end panel, and the vehicle body installation member installed below the rear floor panel is Since the rear bumper is disposed farther forward than the lower wall portion, there is a gap between the vehicle body lower installation member and the lower wall portion. Therefore, originally, a part of the traveling wind flowing under the vehicle body is caught in the gap and flows into the rear bumper through the opening.

  On the other hand, in this automobile, since the opening is partitioned by the wind shielding member, it is possible to effectively prevent the traveling wind entering the gap from entering the interior of the rear bumper.

  Furthermore, since the space behind the vehicle body installation member is partitioned and a space with a small volume is defined there, only a small amount of traveling wind enters, and the air pressure in the space relatively increases. As a result, the traveling wind is less likely to be caught behind the vehicle body lower installation member, and the traveling wind can easily flow behind the automobile.

  Since the amount of air that can enter the gap behind the vehicle body installation member is greatly reduced, even if the traveling wind enters at a stretch, the influence on the air resistance is reduced. As a result, the air resistance during acceleration can be effectively suppressed.

  Specifically, the wind shield member extends upward from the lower end portion of the lower wall portion and extends in the vehicle width direction, and the upper overhanging wall portion projecting forward from the upper end portion of the standing wall portion, It is good to have.

  By doing so, the opening can be more effectively partitioned, and the overhanging wall portion can further prevent the traveling wind from entering the interior of the rear bumper.

  More specifically, a lower end portion of the lower wall portion may be attached to the vehicle body rear portion structure via the wind shielding member.

  If it does so, since the lower end part of the lower wall part of the rear bumper conventionally floating in the air is supported by the rear structure of the vehicle body via the wind shielding member, the support strength and rigidity of the rear bumper can be enhanced.

  Further, it is preferable that the upper overhanging wall portion extends in the vehicle width direction, and that upper end attachment portions attached to the vehicle body rear part structure are provided at both ends of the upper overhanging wall portion.

  By doing so, even if the upper mounting part attached to the rear structure of the vehicle body is far away in the vehicle width direction, the structurally strengthened overhanging wall part is provided between them, so the support strength can be reduced with less attachment. Can be strengthened.

  Further, the wind-shielding member has a lower extending wall portion that protrudes forward from the lower end portion of the standing wall portion and extends in the vehicle width direction, and is attached to the lower wall portion via the lower extending wall portion. You may be there.

  By doing so, the cross section of the wind shield member becomes substantially U-shaped, and the wind shield member itself is structurally strengthened in strength and rigidity, and is attached to the lower wall portion via the strengthened underhanging wall portion. By attaching, the strength and rigidity of the lower wall portion of the rear bumper can be enhanced.

  Further, a fixed receiving portion may be provided at a lower end portion of the lower wall portion, and a fixing portion that is attached to the fixed air receiving member from the front and rear direction may be provided on the wind shielding member.

  Then, the support strength under the rear bumper can be strengthened against the external force from the front and rear, so even if snow or water gets into the rear bumper during snow accumulation or submersion, the wind shielding member will come off the rear bumper. Can be effectively suppressed.

  Furthermore, the lower wall portion may be inclined downward toward the front, and a foreign matter discharge port may be formed at a lower portion of the standing wall portion.

  If a windshield member is provided, there is a risk that foreign matter such as stones that are rolled up during traveling will accumulate inside the rear bumper, but there is a foreign matter discharge port at the bottom of the standing wall at the lower end of the downwardly inclined lower wall. If formed, foreign matter can be discharged through the foreign matter discharge port, so that foreign matter can be prevented from accumulating.

  For example, the vehicle body installation member is a silencer placed horizontally so as to extend in the vehicle width direction, and is suitable when the wind shield member is installed so as to face the silencer in the front-rear direction.

  Since the silencer generates high heat, the rear bumper needs to be installed at a distance from the silencer. Therefore, in the case of a vehicle model in which the silencer is placed horizontally so as to extend in the vehicle width direction, the opening has to extend sideways and becomes large, but by installing the wind shield member so as to face the silencer in the front-rear direction, In addition, it is possible to effectively prevent the air resistance caused by the running wind and the exhaust sound generated by the silencer from being transmitted to the passenger compartment, and the support strength of the rear bumper can be enhanced.

  According to the structure of the present invention, it is possible to effectively suppress an increase in air resistance due to traveling wind entering the rear bumper.

It is the figure which represented simply the cross-sectional structure of the peripheral part of the rear bumper and silencer of the conventional motor vehicle. It is a schematic perspective view which shows an example of the motor vehicle to which this invention was applied. It is the schematic which looked at the rear lower part of the motor vehicle of FIG. 2 from the downward direction. It is a schematic sectional drawing in the XX line in FIG. FIG. 3 is a schematic perspective view of a rear bumper of the automobile of FIG. 2. It is a schematic perspective view of a windshield member. It is a schematic perspective view of a windshield member. It is a schematic sectional drawing in the YY line in FIG. It is a figure equivalent to FIG. 4 showing the modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following description is merely illustrative in nature and does not limit the present invention, its application, or its use. Note that directions such as front and rear, left and right, and up and down follow the directions indicated by arrows in each figure unless otherwise specified.

  FIG. 2 shows an example of an automobile to which the present invention is applied. The automobile 1 is an FF type, and an engine for driving wheels is installed at the front of the automobile 1. A vehicle interior 1 a composed of a boarding space, a luggage space, and the like is formed in the center and rear of the automobile 1.

  A rear bumper 10 is attached to the rear part of the automobile 1 in order to mitigate an impact at the time of a collision from the rear. Projecting rearward from the rear bumper 10 is an end portion 3 of the exhaust pipe. In this vehicle type, one is disposed at each of the left and right end portions of the rear bumper 10.

  3 and 4 show the structure of the rear lower side of the automobile 1. FIG. 3 is a schematic view of the lower rear side of the automobile 1 as viewed from below, and FIG. 4 is a schematic cross-sectional view taken along line XX in FIG.

  As shown in FIGS. 3 and 4, a rear floor panel 21, a rear end panel 22, a rear bumper reinforcement 23, and the like are located in the rear part of the automobile 1 in the vehicle body that forms the skeleton of the automobile 1.

  Side frames 25 extending in the front-rear direction are disposed on the left and right sides of the vehicle body. The rear floor panel 21 extends in the lateral direction so as to close the space between the rear portions of the side frames 25, and constitutes the floor surface of the rear portion of the passenger compartment 1a.

  The rear end panel 22 is joined to the rear ends of the left and right side frames 25 and the rear end of the rear floor panel 21, and extends in the vertical direction from the rear end of the rear floor panel 21 and extends in the vehicle width direction. A hollow cylindrical rear end member 22 a extending in the vehicle width direction along the edge of the rear end panel 22 is provided on the upper portion of the rear end panel 22.

  A crush can 26 extends from the rear end of each of the left and right side frames 25 so as to protrude rearward. The rear bumper reinforcement 23 is a hollow columnar reinforcing member extending in the vehicle width direction, and is erected on the rear end portions of the crash cans 26.

  Below the rear floor panel 21, a silencer 30 (an example of a vehicle body installation member) is installed.

  The silencer 30 is a silencer installed in the middle of an exhaust pipe extending from the front engine. The silencer 30 of the automobile 1 is composed of a flat airtight container, and the appearance thereof is rounded and substantially oval. The silencer 30 is placed horizontally between the left and right side frames 25 so as to extend in the vehicle width direction, and the left and right end portions of the silencer 30 are located in the vicinity of the left and right side frames 25.

  The main part of the exhaust pipe extending from the engine is connected to an exhaust intake port 30a provided in the center of the side surface on the front side of the silencer 30. One exhaust outlet 30b of the silencer 30 is provided at each of the left and right ends of the silencer 30, and the end portions 3 of the left and right exhaust pipes are connected to them. In FIG. 4, the internal structure of the silencer 30 is omitted.

(Rear bumper)
The rear bumper 10 is a resin injection-molded product mounted along the lower edge of the rear portion of the automobile 1. The rear bumper 10 covers the rear part of the vehicle body (rear structure of the vehicle body) including the rear part of the rear bumper reinforcement 23 and the rear floor panel 21, the rear part of the side frame 25, the rear end panel 22, and the like from the rear.

  FIG. 5 shows the rear bumper 10. The rear bumper 10 includes a main wall portion 10a that covers an intermediate portion in the vehicle width direction in the vehicle body rear structure, and an end wall portion that protrudes laterally from each end of the main wall portion 10a and covers left and right corner portions in the vehicle body rear structure. 10b. In the rear bumper 10, the upper edge portions of the main wall portion 10 a and the both end wall portions 10 b and the front edge portion and the lower edge portion of each end wall portion 10 b are mounted on the exterior panel of the automobile 1.

  On the other hand, the lower edge portion of the main wall portion 10a, specifically, the portion between the left and right concave portions 10c (formed to avoid contact with the end portion 3 of the exhaust pipe) is conventionally mounted anywhere. In general, it is unsupported.

  Specifically, the main wall portion 10 a includes an upper wall portion 11, an intermediate wall portion 12, and a lower wall portion 13, and the upper wall portion 11 is attached along the upper end portion of the rear end panel 22. It spreads backward while tilting down. The middle wall portion 12 is connected to the lower portion of the upper wall portion 11 and extends in the vertical direction. The middle wall portion 12 is located behind the rear end panel 22 and the rear bumper reinforcement 23 so as to cover the rear end panel 22 and the rear bumper reinforcement 23.

  The lower wall portion 13 is connected to the lower portion of the middle wall portion 12 and extends downward. The lower wall portion 13 extends downward to a position away from the lower end portion of the rear end panel 22 while being inclined downward. As a result, a horizontally long opening 50 is formed between the lower end 13a of the lower wall portion 13 and the lower end portion of the rear end panel 22, and the lower end portion 13a of the lower wall portion 13 is normally suspended in the air. It is a floating free end.

  On the other hand, in the automobile 1, a fixed receiving portion 15, an attachment piece portion 16, and the like are provided at the lower end portion 13 a of the lower wall portion 13 and are in a supported state (details will be described later).

  As shown in FIG. 4, the silencer 30 is disposed at a position farther forward than the lower wall portion 13 with its bottom surface 30 c positioned below the lower end portion 13 a of the lower wall portion 13.

  Since the bottom surface 30c of the silencer 30 is located below the lower end portion 13a of the lower wall portion 13, most of the traveling wind that flows below the automobile 1 during traveling, as indicated by the arrow line in FIG. Flows along the rear surface of the automobile 1 along the bottom surface 30 c and the outer surface of the lower wall portion 13.

  Since there is a gap (space S1 after the silencer) between the silencer 30 and the lower wall portion 13, a part of the running wind is caught in the space S1 after the silencer and between the rear portion of the vehicle body and the rear bumper 10 through the opening 50. Into the space (pre-bumper space S2).

  Since the pre-bumper space S2 has a relatively large volume, a large air resistance is generated when traveling wind enters the pre-bumper space S2. In particular, the influence of the driving wind is large because the driving wind enters at a stretch during acceleration.

  Therefore, in the automobile 1, the wind resistance member 60 is provided at the lower end portion 13 a of the lower wall portion 13 so as to protrude from the opening 50, thereby effectively suppressing air resistance due to the entry of traveling wind into the space S <b> 2 before the bumper. doing. Further, in the automobile 1, the support of the rear bumper 10 is enhanced by using the wind shielding member 60.

(Wind shield member)
6 and 7 show the wind shielding member 60. The wind shielding member 60 is a resin injection-molded product composed of a standing wall portion 61, an overhanging wall portion 62, a lower overhanging wall portion 63, a fixing portion 64, an upper mounting portion 65, a lower mounting portion 66, and the like. As shown in FIGS. 3 and 4, the rear bumper 10 is attached to the lower wall portion 13. The wind shield member 60 is provided with dots so that it can be easily identified.

  The standing wall portion 61 is a strip-like portion extending in the lateral direction, and extends upward from the lower end portion 13a of the lower wall portion 13 and extends in the vehicle width direction. The upper overhanging wall portion 62 is substantially orthogonal to the upright wall portion 61 and protrudes forward from the upper end portion of the upright wall portion 61 to extend in the vehicle width direction. The underhanging wall portion 63 includes the upper overhanging wall portion 62 and While facing up and down, it projects forward from the lower end of the standing wall 61 and extends in the vehicle width direction.

  Therefore, the cross section of the wind shielding member 60 is substantially U-shaped by the standing wall portion 61, the overhanging wall portion 62, and the underhanging wall portion 63, and the strength and rigidity are structurally enhanced. ing. Further, a plurality of ribs 67 are provided on the front surface of the standing wall portion 61 between the upper and lower extending wall portions 62 and 63, and these ribs 67 are arranged at regular intervals in the vehicle width direction. By arranging, the strength and rigidity are further enhanced.

  The lower attachment portions 66 are provided at a plurality of locations on the lower overhanging wall portion 63 and are arranged at regular intervals in the vehicle width direction. In the case of the wind shielding member 60, four lower attachment portions 66 are provided. As shown in FIG. 5, the lower wall portion 13 of the rear bumper 10 is provided with four attachment piece portions 16 that are fitted to the lower attachment portions 66.

  One fixing portion 64 is provided at each end of the standing wall portion 61. Each fixing portion 64 is provided with a fastening hole 64 b and a claw portion 64 a that protrudes rearward from the rear surface of the standing wall portion 61. As shown in FIG. 5, fixed receiving portions 15 to which the fixing portions 64 are attached are provided on the lower wall portion 13 of the rear bumper 10 corresponding to the fixing portions 64. Each fixed receiving portion 15 is provided with a fastening boss 15b and an insertion hole 15a into which the claw portion 64a is inserted toward the front.

  The wind shielding member 60 is attached to and integrated with the rear bumper 10 before being mounted on the rear portion of the automobile 1. Specifically, each claw portion 64a is inserted into each insertion hole 15a from the front, and each attachment piece portion 16 and each corresponding lower attachment portion 66 are fitted together.

  Then, as shown in FIG. 8, the attachment pieces 16 and the lower attachment portions 66 that are vertically overlapped are fixed together by screwing them from below. Further, the fastening hole 64b and the fastening boss 15b that overlap in the front-rear direction are fixed together by screwing from the front. Since the wind shielding member 60 is attached to the rear bumper 10 from the top and bottom and the front and rear direction, it is firmly integrated with the rear bumper 10.

  One upper attachment portion 65 is provided at each end of the overhanging wall portion 62. Each upper mounting portion 65 is formed with a first pin insertion hole 65a penetrating upward. At the lower end portion of the rear end panel 22, a mounting flange portion 22b that overlaps with the upper mounting portion 65 is provided. A second pin insertion hole 22c communicating with the first pin insertion hole 65a is formed in the mounting flange portion 22b.

  By inserting the retaining pins 68 from below into the first and second pin insertion holes in a state where each upper mounting portion 65 is overlapped with the corresponding mounting flange portion 22b, the wind shielding member 60 is formed in the rear structure of the vehicle body. It is attached. Therefore, since the lower end portion 13a of the lower wall portion 13 of the rear bumper 10 that has conventionally floated in the air is supported by the rear structure of the vehicle body via the wind shield member 60, the support strength and rigidity of the rear bumper 10 are enhanced. Yes.

  The upper attachment portion 65 attached to the rear structure of the vehicle body is greatly separated in the vehicle width direction, and the structurally strengthened upper projecting wall portion 62 is provided between the upper attachment portions 65, so that the support strength is enhanced with less attachment. Is planned.

  In particular, the wind shielding member 60 is reinforced against the external force from the front-rear direction by being attached to the rear bumper 10 from the front-rear direction by the fixing part 64 and the fixed receiving part 15.

  That is, when snow is accumulated or flooded, snow or water may enter the space S2 before the bumper and an excessive force may be applied to the rear bumper 10 from the front-rear direction. On the other hand, in the case of this automobile 1, in addition to being supported on the lower side of the rear bumper 10, it is strengthened against the external force from the front and rear direction. It is possible to effectively suppress the separation.

  The wind shielding member 60 attached so as to overhang the opening 50 is opposed to the silencer 30 in the front-rear direction with a gap. As a result, since the space S1 after the silencer and the space S2 before the bumper are partitioned by the wind shielding member 60, it is possible to effectively prevent the traveling wind entering the space S1 after the silencer from entering the space S2 before the bumper.

  In particular, in the automobile 1, since the overhanging wall portion 62 is provided, it is possible to further prevent the traveling wind from entering the space S <b> 2 before the bumper.

  In addition, the space after the silencer S1 and the space before bumper S2 are partitioned by the wind shielding member 60, so that the space after the silencer S1 having a small volume is formed after the silencer 30. Therefore, the air pressure in the space S1 after the silencer is relatively increased only by entering a small amount of traveling wind. As a result, the traveling wind is less likely to be caught in the space S1 after the silencer, and the traveling wind easily flows to the rear of the automobile 1 along the outer surface of the lower wall portion 13.

  Since the air volume that can enter the space S1 after the silencer is greatly reduced, even if the traveling wind enters at a stretch, the influence on the air resistance is reduced. As a result, the air resistance during acceleration can be effectively suppressed.

  When traveling, exhaust noise is generated by the silencer 30. Accordingly, the wind shielding member 60 not only suppresses the entry of the traveling wind into the bumper space S2, but also suppresses the exhaust sound generated by the silencer 30 from entering the bumper space S2, so that the exhaust air is exhausted into the vehicle compartment 1a. There is also an advantage that it is possible to prevent the sound from being transmitted greatly.

  In addition, a plurality of foreign matter discharge ports 69 are formed in the lower portion of the standing wall portion 61. Specifically, three openings penetrating the standing wall portion 61 are formed at equal intervals in the vehicle width direction, and the lower edge of the opening is set to be substantially the same height as the upper surface of the lower wall portion 13. ing.

  When traveling, a foreign object such as a stone may be wound up and enter the pre-bumper space S2. In that case, since the lower wall portion 13 is inclined downward, the foreign matter rolls forward. However, when the wind shielding member 60 is provided, the foreign matter is caught by the standing wall portion 61 and accumulated in the lower portion of the space S2 before the bumper. There is a risk.

  On the other hand, in this automobile 1, since the foreign matter discharge port 69 is formed in the standing wall portion 61, the foreign matter can be discharged from the pre-bumper space S2 through the foreign matter discharge port 69, and foreign matter can be prevented from accumulating.

  It should be noted that the rear lower structure of the vehicle according to the present invention is not limited to the above-described embodiment, but includes various other configurations.

  The form of the wind shielding member 60 can be appropriately changed according to the specification. For example, the standing wall portion 61 and the overhanging wall portion 62 may be formed with overhanging wall portions that project further outward from both ends thereof. Then, it is possible to further suppress the entry of the traveling wind into the pre-bumper space S2.

  Further, as shown in FIG. 9, a block-shaped wind shielding member 60 ′ is formed using a lightweight foamable resin, and is attached to the upper surface of the lower wall portion 13 so that most of the opening 50 is covered. Also good. Even in this case, the entry of the traveling wind into the pre-bumper space S2 can be suppressed and the post-silencer space S1 having a small volume can be defined.

  It is preferable to use a material having better heat resistance than the rear bumper 10 as the material of the wind shielding member 60 or to make the thickness of the wind shielding member 60 larger than that of the rear bumper 10. Then, the rear bumper 10 can be protected from the heat damage of the silencer 30, and the rear bumper 10 can be brought close to the silencer 10 to reduce the post-silencer space S1, so that the air resistance due to the traveling wind can be further reduced. Become.

DESCRIPTION OF SYMBOLS 1 Car 1a Car interior 10 Rear bumper 11 Upper wall part 12 Middle wall part 13 Lower wall part 13a Lower end part 21 Rear floor panel 22 Rear end panel 23 Rear bumper reinforcement 25 Side frame 30 Silencer (vehicle body lower installation member)
30c Bottom surface 50 Opening 60 Wind shield member 61 Standing wall portion 62 Overhanging wall portion 63 Lower overhanging wall portion 64 Fixed portion 65 Upper mounting portion 66 Lower mounting portion 69 Foreign matter discharge port S1 Silencer rear space S2 Bumper front space

Claims (7)

A structure under the rear of a car,
A vehicle body rear structure including a rear floor panel that extends to a rear portion of the vehicle body to form a floor surface of the passenger compartment, and a rear end panel that extends in a vertical direction from the rear end portion of the rear floor panel and extends in the vehicle width direction;
A vehicle body lower installation member installed below the rear floor panel;
A rear bumper covering the rear structure of the vehicle body from the rear;
With
The rear bumper is
An upper wall portion attached along an upper end portion of the rear end panel;
A middle wall portion that extends to the rear wall of the rear end panel and extends to the upper wall portion;
A lower wall portion extending downward from a lower end portion of the rear end panel connected to the middle wall portion;
Have
Between the lower end portion of the lower wall portion and the lower end portion of the rear end panel, an opening facing forward is formed,
The vehicle body installation member is disposed farther forward than the lower wall portion, with the bottom surface positioned below the lower end portion of the lower wall portion,
A wind-shielding member projecting from the opening is provided at the lower end of the lower wall portion ,
The windshield member is
A standing wall portion extending upward from the lower end portion of the lower wall portion and extending in the vehicle width direction;
An overhanging wall portion projecting forward from the upper end portion of the standing wall portion;
Have a structure. The structure of claim 1, wherein
A structure in which a lower end portion of the lower wall portion is attached to the vehicle body rear portion structure via the wind shielding member. The structure of claim 2,
A structure in which the overhanging wall portion extends in the vehicle width direction, and upper mounting portions that are attached to the vehicle body rear structure are provided at both ends of the overhanging wall portion. The structure of claim 3,
The wind-shielding member has a lower projecting wall portion that projects forward from the lower end of the standing wall portion and extends in the vehicle width direction, and is attached to the lower wall portion via the lower projecting wall portion. Construction. In the structure according to any one of claims 2 to 4,
A structure in which a fixed receiving portion is provided at a lower end portion of the lower wall portion, and a fixing portion that is attached to the fixing member from the front-rear direction is provided in the windshield member. In the structure according to any one of claims 1 to 5,
A structure in which the lower wall portion is inclined downward toward the front, and a foreign matter discharge port is formed at a lower portion of the standing wall portion. In the structure according to any one of claims 1 to 6,
The vehicle body installation member is a silencer placed horizontally so as to extend in the vehicle width direction, and the wind shield member is installed so as to face the silencer in the front-rear direction.

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