CN104583060B - Vehicle body rear part structure - Google Patents

Abstract

The vehicle body rear structure (10) has: a rear panel reinforcement (23) comprising a reinforced L-shaped section (56); a rear beam section (25) comprising an inner L-shaped section (65); and an upper reinforcement extension ( 28) and the corner panel (27) that rear panel side extension part (29) constitutes. A first ridgeline (52) is provided on the reinforced L-shaped cross section, and a second ridgeline (77) is provided on the inner L-shaped cross section. The upper reinforcement extension has an upper L-shaped cross-sectional portion (89) continuous with each L-shaped cross-sectional portion, and has a third ridgeline (86) continuous with each ridgeline. The rear panel side extension (29) has a partition (93) that partitions the corner closed section (81).

Description

rear body structure

technical field

The present invention relates to a rear structure of a vehicle body, wherein a rear outer wall is provided at the rear of the vehicle body, a rear beam is erected from the rear outer wall, and a corner panel is provided at the intersection of the rear outer wall and the rear beam.

Background technique

In the vehicle body rear structure, the rear outer wall rises upward from the rear end of the rear floor forming the floor portion of the vehicle body, and the rear outer wall forms the rear portion of the trunk (car compartment). The rear outer wall is formed in a hollow closed cross section by a rear panel outer member and a rear panel inner member rising upward from the rear end of the rear floor (for example, refer to Patent Document 1).

However, the rear outer wall of Patent Document 1 is formed into a large hollow closed cross section by the rear panel outer member and the rear panel inner member. Therefore, it is difficult to ensure the rigidity and strength of the rear outer wall, and it is required to study how to suppress the crushing deformation of the rear outer wall due to the input load when a load is input to the rear outer wall.

In the vehicle body rear structure, a rear beam is connected to an outer end portion in the vehicle width direction of the rear outer wall, and the rear beam is connected to the roof side rail. By connecting the rear beam to the outer end portion of the rear outer wall, the rear opening of the vehicle compartment is formed by the upper portion of the rear outer wall and the rear beam. Therefore, when the rear outer wall has a large hollow closed cross-section, it is difficult to satisfactorily transmit load between the rear outer wall and the rear beam, and it is required to study how to satisfactorily transmit the load between the rear outer wall and the rear beam.

As a measure to suppress the crush deformation of the rear outer wall and to transmit the load well between the rear outer wall and the rear beam, it is conceivable to provide a bulkhead portion inside the rear outer wall and divide the closed cross section by the bulkhead portion. Rigidity and strength of the rear outer wall can be ensured by partitioning the closed cross section by the partition portion. However, when the partition wall is provided inside the rear outer wall, the number of parts of the partition increases and the number of components increases, resulting in a complicated structure.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2009-208610

Contents of the invention

An object of the present invention is to provide a vehicle body rear structure capable of suppressing an increase in the number of parts and ensuring the rigidity and strength of a rear outer wall (vehicle rear).

According to the invention of technical solution 1, there is provided a vehicle body rear structure, which has: a rear panel outer member, which stands upward from the rear end of the rear floor of the vehicle body, and forms a rear outer wall that separates the vehicle compartment from the outside; the rear panel reinforces part, which is joined to the vehicle interior side surface of the rear panel outer member, whereby at the lower edge of the rear opening of the vehicle body, together with the rear panel outer member, a lower closed cross section extending in the vehicle width direction is formed. part; a rear beam part, which stands upward from the outer side of the rear panel outer member in the vehicle width direction, and forms a side closed section extending in the vertical direction through the side edge of the vehicle width direction outer side in the rear opening; and a corner panel, which is joined to the rear panel outer member and the rear beam portion, whereby the lower closed section portion and the side portion are closed in the concave corner portion of the rear opening portion. A corner closed section with a continuous section, the rear structure of the vehicle body is characterized in that the rear panel reinforcement includes an L-shaped section consisting of an upper surface that opens from the opening of the rear opening The flange portion extends toward the front side of the vehicle; and a drooping surface that hangs down between the front end of the upper surface via a first ridge line, and the rear beam portion includes an L-shaped cross-sectional portion composed of: a side surface, which Extending from the opening flange portion of the rear opening portion toward the front of the vehicle body; and an extending surface extending outward in the vehicle width direction through a second ridge line between the front end of the side surface, and the gusset panel has: an upper reinforcement The extension portion has an L-shaped cross-sectional portion continuous to each L-shaped cross-sectional portion of the rear panel reinforcement and the rear beam portion, and has an L-shaped cross-sectional portion connected to the first ridgeline and the second ridge line. a third ridgeline with continuous ridgelines; and a rear panel side extension which, together with the upper reinforcement extension, constitutes the corner closed section and has partitions for dividing the corner closed section into a plurality of parts. board department.

In the invention according to claim 2, it is preferable that the partition plate part is arranged continuously with the upper surface of the rear panel reinforcement.

In the invention according to claim 3, it is preferable that the rear panel outer member has: a general surface arranged substantially vertically; Bending towards the front of the vehicle body, the upper reinforcement extension has a welding torch penetration hole for spot welding the rear panel outer member and the rear panel side extension, and the rear panel side extension has a The entire range of the surface and the curved surface is joined to the first flange.

In the invention of claim 4, it is preferable that the rear panel side extension has an outer flange sandwiched between the upper end of the rear panel outer member and the upper flange of the upper reinforcement extension to be joined. the 2nd flange.

In the invention of claim 5, preferably, the lateral step portion extending in the vehicle width direction of the rear panel side extension portion is aligned with the lateral bead extending in the vehicle width direction of the rear panel outer member.

In the invention according to claim 6, preferably, the vertical ribs extending in the vertical direction of the upper reinforcement extension part are aligned with the vertical ribs extending in the vertical direction of the rear panel side extension part.

In the invention of claim 7, preferably, the rear panel outer member has: a first outer ridge line extending in the vehicle width direction; and a second outer ridge line below the first outer ridge line. Extending in the vehicle width direction, the rear panel side extending portion has a support portion extending so as to support between the first outer edge line and the second outer edge line.

The effect of the invention

In the invention of claim 1, the L-shaped cross-section of the upper reinforcement extension is continuous with the L-shaped cross-section of the rear panel reinforcement and the L-shaped cross-section of the rear beam, thereby making the first ridgeline and the second ridgeline And the 3rd ridge line is continuous.

Therefore, the load transmission between the rear panel reinforcement and the rear beam can be satisfactorily performed through the L-shaped cross-sectional portion (third ridgeline) of the upper reinforcement extension portion. Accordingly, the load transmission efficiency between the rear panel reinforcement and the rear beam portion can be improved, and the rigidity and strength of the rear outer wall (vehicle rear portion) can be increased.

Furthermore, a partition portion is provided on the rear panel side extension portion, and the corner closed cross-section portion is partitioned into a plurality of parts by the partition portion. As a result, the corner-closed cross-sectional portion (that is, the rear outer wall) can withstand crush deformation, and the rigidity and strength of the rear outer wall (vehicle rear portion) can be improved.

Furthermore, since the corner closed cross-sectional portion is partitioned into a plurality of parts by the partition wall portion included in the rear panel side extension portion, it is not necessary to separately provide the partition wall portion, and an increase in the number of parts can be suppressed.

In the invention of claim 2, the bulkhead portion is continuous with the upper surface of the rear panel reinforcement. Accordingly, a load can be favorably transmitted from the upper surface of the rear panel reinforcement to the bulkhead portion.

Accordingly, since the load transmission efficiency from the rear panel reinforcement to the rear panel side extension can be improved, the rigidity and strength of the rear outer wall (vehicle rear portion) can be further improved.

In the invention of claim 3, the upper reinforcing extension part has a welding torch insertion hole. Thus, even when the corner closed section is formed by the upper reinforcement extension and the rear panel side extension, the electrode for spot welding can be inserted into the corner closed section through the torch insertion hole. .

Thereby, the rear panel outer member and the rear panel side extension part can be spot-welded from the inner side of the corner closed cross-sectional part.

Furthermore, the first flange of the rear panel side extension is joined to the entire range of the normal surface and the curved surface of the rear panel outer member. Thereby, since the normal surface part and the curved surface part can be reinforced by the 1st flange, the rigidity and intensity|strength of a rear panel outer member can be further improved.

In the invention of claim 4, the second flange of the rear panel side extension is joined to the outer flange of the rear panel outer member and the upper flange of the upper reinforcement extension in a sandwiched state.

Accordingly, the second flange can be firmly supported by the outer flange and the upper flange. Thereby, the joint strength of the second flange can be increased, and thus the rigidity and strength of the rear panel side extension portion can be increased.

In the invention of claim 5, the rigidity and strength of the rear outer wall (vehicle rear portion) can be further improved by aligning the horizontal step portion of the rear panel side extension and the lateral rib of the rear panel outer member.

In the invention of claim 6, the rigidity and strength of the rear outer wall (vehicle rear portion) can be further improved by aligning the longitudinal ribs of the upper reinforcement extension and the longitudinal ribs of the rear panel side extension.

In the invention of claim 7, the rear panel outer member has a first outer edge line and a second outer edge line, and has a support portion for supporting between the first outer edge line and the second outer edge line.

Accordingly, the first outer ridgeline and the second outer ridgeline can be reinforced by the support portion, so that the first outer ridgeline and the second outer ridgeline can be prevented from moving toward each other. Thus, the rigidity and strength of the rear outer wall (vehicle rear portion) can be further enhanced by having the support portion between the first outer ridgeline and the second outer ridgeline.

Description of drawings

FIG. 1 is a perspective view of a vehicle body rear structure according to the present invention as viewed from the cabin side.

FIG. 2 is an enlarged view of part 2 of FIG. 1 .

Fig. 3 is an exploded perspective view showing the rear structure of the vehicle body in Fig. 2 .

Fig. 4 is an exploded perspective view of a state in which an upper reinforcement extension is disassembled from the vehicle body rear structure in Fig. 2 .

Fig. 5 is a cross-sectional view along line 5-5 of Fig. 2 .

Fig. 6 is a sectional view taken along line 6-6 of Fig. 4 .

Fig. 7 is a cross-sectional view along line 7-7 of Fig. 2 .

FIG. 8 is a diagram illustrating an example of load transmission between a rear panel reinforcement and a rear beam in the vehicle body rear structure of the present invention.

9 is a diagram illustrating an example of load transmission from a rear panel reinforcement to a rear panel side extension in the vehicle body rear portion structure of the present invention.

Fig. 10 is a diagram illustrating an example of reinforcing the first outer ridgeline and the second outer ridgeline of the rear panel outer member by a support portion in the vehicle body rear portion structure of the present invention.

11 is a diagram illustrating an example of preventing crush deformation of the rear outer wall by the bulkhead portion of the rear panel side extension portion of the vehicle body rear portion structure of the present invention.

detailed description

Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings. Also, "Front (Fr)", "Rear (Rr)", "Left (L)", and "Right (R)" follow directions seen from the driver.

Example

As shown in FIG. 1 , the vehicle body rear structure 10 has: left and right rear side frames 12 arranged at predetermined intervals on the left and right sides of the vehicle body 11; A rear floor 14 such as a floor portion; a left wheel house 15 provided on the left rear frame 12 ; and a right wheel house provided on the right rear frame 12 . The left wheel house 15 and the right wheel house are respectively provided with a left rear post 16 and a right rear post at their respective upper parts.

Furthermore, the vehicle body rear structure 10 has: a rear panel outer member 21 standing upward from the rear end 14a of the rear floor panel 14; a rear panel reinforcement 23 joined to an inner surface (vehicle interior side surface) 21a of the rear panel outer member 21; A rear beam portion 25 rising upward from the vehicle width direction outer side of the rear panel outer member 21 ; and a gusset panel 27 joined to the rear panel outer member 21 and the rear beam portion 25 .

The rear panel outer member 21 stands upward from the rear end 14 a of the rear floor 14 and is joined to the rear ends 12 a of the left and right rear side frames 12 . The rear panel outer member 21 is provided on the rear portion of the vehicle body 11 in the vehicle width direction to form the rear outer wall 18 . The vehicle compartment 31 is partitioned off from the vehicle exterior (outside) 32 by the rear outer wall 18 .

As shown in FIGS. 2 and 3 , the rear panel outer member 21 has: a general face 34 standing up from the rear end 14 a (refer to FIG. 1 ) of the rear floor 14; Curve the face 42 .

Generally, the face part 34 is formed in a substantially rectangular shape, and is provided substantially vertically upward from the rear end 14 a of the rear chassis 14 . The general face portion 34 has: an outer L-shaped section 35 formed in a substantially L-shaped section; an outer flange 36 provided on an upper end 35 a of the outer L-shaped section 35; an upper bulge provided on a lower end of the outer L-shaped section 35 38 ; and a lower bulging portion 39 disposed below the upper bulging portion 38 .

The outer flange 36 is bent upwardly from the upper end 35 a of the outer L-shaped cross-sectional portion 35 toward the rear of the vehicle body. The outer flange 36 has a curved flange 36 a at the outer end in the vehicle width direction outer side. The curved flange 36a is formed in a curved shape so as to rise outward in the vehicle width direction.

The upper bulging portion 38 is formed so as to bulge toward the vehicle cabin 31 side, and has a first outer ridge line 38a. The first outer ridgeline 38 a is a corner portion formed so as to bulge toward the vehicle cabin 31 side in the bent portion of the upper bulging portion 38 . The first outer ridgeline 38a extends substantially horizontally in the vehicle width direction.

The lower bulging portion 39 is formed so as to bulge toward the vehicle cabin 31 side, and has a second outer ridgeline 39a. The second outer ridge line 39 a is a corner portion formed so as to bulge toward the vehicle cabin 31 side in the bent portion of the lower bulging portion 39 . The second outer ridgeline 39a extends substantially horizontally in the vehicle width direction, and has a ridgeline inclined portion 39b at the outer end. The ridgeline inclined portion 39b is formed with an upward slope from the middle of the second outer ridgeline 39a toward the first outer ridgeline 38a. By having an upper bulging portion 38 (first outer ridgeline 38a) and a lower bulging portion 39 (second outer ridgeline 39a) on the general surface 34 of the rear panel outer member 21, the upper bulging portion 38 and the lower bulge can be formed. The bulging portion 39 reinforces the rear panel outer member 21 (the general face portion 34 ).

The curved surface portion 42 is formed in a substantially rectangular shape, is provided on the outside of the general surface portion 34 in the vehicle width direction, and is curved obliquely from the outer end 34 a of the general surface portion 34 toward the front of the vehicle body. Thereby, the normal surface 34 and the curved surface 42 are bent at the outer end 34a of the normal surface 34 into a substantially bent shape in cross section (see FIG. 7 ). The curved surface portion 42 has upper and lower curved lateral ribs (lateral ribs) 43 , 44 extending in the vehicle width direction and spaced at predetermined intervals in the vertical direction. The upper and lower curved transverse ribs 43 and 44 are concave toward the rear of the vehicle body, and are formed approximately horizontally by extending in the vehicle width direction. By having the upper and lower curved transverse ribs 43 , 44 on the curved surface portion 42 , the curved surface portion 42 can be reinforced by the vertical curved transverse ribs 43 , 44 .

As shown in FIGS. 3 and 4 , the rear panel reinforcement 23 is joined to the inner surface 21 a of the rear panel outer member 21 at the upper portion of the rear panel outer member 21 . Specifically, the rear panel reinforcement 23 has: an upper flange 47 joined to the outer flange 36; surface) 48; a vertical reinforcing portion (sagging surface) 49 bent downward from the front end 48a of the upper reinforcing portion 48; and a lower flange 51 protruding downward from the lower end 49a of the vertical reinforcing portion 49. Furthermore, the rear panel reinforcement 23 has a first ridgeline 52 formed by a bent portion between the upper reinforcement portion 48 and the vertical reinforcement portion 49 .

By joining the upper flange 47 to the outer flange 36 from above, the lower edge 54a of the opening flange portion 54 is formed by the outer flange 36 and the upper flange 47 . The opening flange portion 54 is a flange formed around the rear opening portion 61 (see FIG. 2 ). The rear opening 61 is formed at the rear of the vehicle body 11 and is an opening for opening the compartment 31 . The rear opening 61 is formed so as to be openable and closable by a trunk lid or the like.

The upper reinforcement part 48 is formed substantially horizontally. The upper reinforcement part 48 and the vertical reinforcement part 49 are bent into a substantially L-shaped cross section. The vertical reinforcement part 49 hangs downward via the first ridgeline 52 between the front end 48 a of the upper reinforcement part 48 . The first ridgeline 52 is a corner portion that bulges toward the front of the vehicle body.

By bending the upper reinforcement portion 48 and the vertical reinforcement portion 49 into a substantially L-shaped cross section, a reinforced L-shaped cross section (L-shaped cross section) 56 is formed so as to bulge forward of the vehicle body. That is, the rear panel reinforcement 23 includes a reinforcing L-shaped cross-sectional portion 56 having the first ridgeline 52 .

The upper flange 47 is joined to the outer flange 36 in a state of overlapping from above, and the lower flange 51 is joined to the upper bulging portion 38 of the general face portion 34 in a state of overlapping from the front of the vehicle body. Thus, the lower closed cross-sectional portion 62 of the rear opening portion 61 is constituted by the rear panel reinforcement 23 and the rear panel outer member 21 (specifically, the general surface portion 34 ). The lower closed section 62 is formed by the upper reinforcement 48 , the vertical reinforcement 49 , and the outer L-shaped section 35 so that the closed section extends in the vehicle width direction, thereby improving rigidity and strength. The lower edge 54 a of the rear opening 61 (opening flange 54 ) is formed by the lower closed section 62 .

As shown in FIGS. 2 and 4 , the rear beam portion 25 rises upward from the upper part 21b on the outer side in the vehicle width direction of the rear panel outer member 21, and has an inner L-shaped cross-section (L-shaped cross-section) facing the vehicle cabin 31 side. portion) 65 and the outer L-shaped cross-sectional portion 71 facing the vehicle exterior 32 side.

The rear flange 67 of the inner L-shaped section 65 and the rear flange 72 of the outer L-shaped section 71 are joined, and the front flange 69 of the inner L-shaped section 65 and the front flange 73 of the outer L-shaped section 71 are joined. join. By joining the inner L-shaped cross-section 65 and the outer L-shaped cross-section 71 , the inner L-shaped cross-section 65 and the outer L-shaped cross-section 71 form a side closed cross-section 75 extending in the vertical direction. The rigidity and strength of the rear beam portion 25 can be improved by forming the side closed cross-section portion 75 in a closed cross-section extending in the vertical direction.

The side edge 54 b of the rear opening 61 (opening flange 54 ) of the vehicle body 11 is formed by the side closed cross section 75 . The rear flange 72 of the outer L-shaped cross section 71 has a lower curved flange 72a at the lower end. As shown in FIG. 3 , the lower curved flange 72 a is formed in a curved shape toward the inner side in the vehicle width direction. The inner end portion in the vehicle width direction of the lower curved flange 72 a is connected (joined) to the curved flange 36 a of the outer flange 36 .

As shown in FIGS. 2 and 4 , the inner L-shaped cross section 65 has: a beam side portion (side) 66 protruding (extending) from the opening flange portion 54 of the rear opening 61 toward the front of the vehicle body; The front end 66a of the portion 66 is a beam extension surface (extension surface) 68 bent outward in the vehicle width direction. The side edge 54b of the opening flange portion 54 is formed by joining the rear flange 67 of the inner L-shaped cross-sectional portion 65 and the rear flange 72 of the outer L-shaped cross-sectional portion 71 .

The beam extension surface portion 68 extends outward in the vehicle width direction via the second ridge line 77 between the beam extension surface portion 66 and the front end 66 a of the beam side surface portion 66 . The second ridgeline 77 is a corner portion that bulges toward the front of the vehicle body. Returning to FIG. 1 , the upper end 25 a of the rear beam portion 25 is connected to the left roof rail via the left rear pillar 16 .

As shown in FIGS. 2 and 3 , the corner panel 27 has: an upper reinforcement extension 28 erected on the rear panel outer member 21 and the rear beam portion 25; and a rear panel side extension 29 arranged on the lower side of the upper reinforcement extension 28 . The corner panel 27 is joined in a state of being bridged over the rear panel outer member 21 and the rear beam portion 25 , thereby forming a corner closed cross-sectional portion 81 by the rear panel outer member 21 and the corner panel 27 . The corner closed section 81 is formed in a closed section (see FIG. 5 ), and is a section in which the lower closed section 62 and the side closed section 75 are continuous in a curved shape in the concave corner 61 a of the rear opening 61 . .

The upper reinforcement extension 28 has: an upper flange 83 formed in a curved shape; an upper curved portion 84 formed in a curved shape by protruding from the upper flange 83 toward the front of the vehicle body; Curved upper vertical portion 85. A curved third ridgeline 86 is formed by the bent portions of the upper curved portion 84 and the upper vertical portion 85 . The third ridgeline 86 is a curved corner portion that bulges toward the front of the vehicle body.

As shown in FIGS. 3 and 4, the upper flange 83 is joined to the second flange 96 of the rear panel side extension 29, the rear flange 72 (lower curved flange 72a) of the outer L-shaped cross section 71, and the inner side flange 83 from above. on the rear flange 67 (lower end 67 a ) of the L-shaped cross-sectional portion 65 . The second flange 96 is joined to the outer flange 36 of the general face portion 34 and the outer end 47a of the rear panel reinforcement 23 (upper flange 47 ) from above. The upper flange 47 engages on the outer flange 36 from above.

The inner end 84a of the upper curved portion 84 is joined to the inner end 93a of the rear panel side extension 29 (partition plate portion 93 ) from above, and the outer end 84b is joined to the lower end 66b of the beam side portion 66 from inside in the vehicle width direction. The upper vertical portion 85 is formed in a substantially triangular shape, and has a plurality of upper vertical ribs (vertical ribs) 87 provided at the lower end 85a, and a torch insertion hole 88 provided near the outer end.

The plurality of upper vertical ribs 87 are concave toward the rear of the vehicle body and are formed to extend in the vertical direction (approximately vertical direction). By providing a plurality of upper vertical ribs 87 at the lower end 85a of the upper vertical portion 85, the upper vertical portion 85 (the upper reinforcement extension portion 28) can be reinforced.

The torch insertion hole 88 is a hole formed for spot welding the rear panel outer member 21 and the rear panel side extension 29 . Here, as shown in FIG. 5 , a corner closed section 81 is formed by the upper reinforcement extension 28 , the rear panel side extension 29 , and the rear panel outer member 21 .

Therefore, it is difficult to insert the electrode 91 for spot welding into the inside of the corner closed cross-sectional portion 81 . Here, a torch insertion hole 88 is formed in the upper vertical portion 85 . Thereby, the electrode 91 for spot welding can be inserted into the inside of the corner closed cross-sectional part 81 through the torch insertion hole 88 . Thereby, the flange joint part 108 (described later) of the rear panel outer member 21 and the 1st flange 95 of the rear panel side extension part 29 can be spot-welded from the inside of the corner closed cross-sectional part 81.

Returning to FIGS. 3 and 4 , the lower end 85a of the upper vertical portion 85 is joined to the upper end 92a of the rear panel side extension 29 (side vertical portion 92 ) from the front of the vehicle body. Moreover, the lower half of the outer end 85b of the upper vertical portion 85 is joined to the curved surface 42 of the rear panel outer member 21 from the front of the vehicle body (see FIG. 7 ), and the upper half of its outer end 85b is joined from the front of the vehicle In the lower portion 71a of the outer L-shaped cross-sectional portion 71 . Furthermore, the upper end 85c of the upper vertical portion 85 is joined to the lower end 65a of the inner L-shaped cross-sectional portion 65 (extended surface portion) from the front of the vehicle body.

An upper L-shaped cross-sectional portion (L-shaped cross-sectional portion) 89 is formed by the upper curved portion 84 and the upper vertical portion 85 , and has a curved third ridgeline 86 on the upper L-shaped cross-sectional portion 89 . That is, the upper reinforcement extension portion 28 has an upper L-shaped cross-sectional portion 89 having the third ridgeline 86 . The upper L-shaped cross-sectional portion 89 is provided continuously to the reinforcing L-shaped cross-sectional portion 56 and the inner L-shaped cross-sectional portion 65 . Furthermore, the third ridgeline 86 is formed continuously with the first ridgeline 52 and the second ridgeline 77 (see also FIG. 2 ).

Accordingly, load transmission between the rear panel reinforcement 23 and the rear beam portion 25 can be satisfactorily performed through the upper L-shaped cross-sectional portion 89 (third ridgeline 86 ) of the upper reinforcement extension portion 28 . Thereby, the load transmission efficiency between the rear panel reinforcement 23 and the rear beam part 25 can be improved, and the rigidity and strength of the rear outer wall 18 (vehicle rear part) can be improved.

The rear panel side extension 29 constitutes a corner closed section 81 together with the upper reinforcement extension 28 and the rear panel outer member 21, and the rear panel side extension 29 has a partition partitioning the corner closed section 81 into a plurality of parts. part 93 (also refer to FIG. 7).

Specifically, the rear panel side extending portion 29 has: a side vertical portion 92 provided along the rear panel outer member 21 (general face portion 34, curved face portion 42); The bent partition portion 93 .

Furthermore, the rear panel side extension portion 29 has: a side standing upper surface portion 94 bent upward from a rear end 93b of the bulkhead portion 93 (see also FIG. 5 ); and a second flange 96 bent from the upper end of the lateral upper surface portion 94 toward the rear of the vehicle body.

Here, the mounting bracket 112 is joined to the lower portion of the rear panel side extension 29 from the front of the vehicle body. The mounting bracket 112 is mounted on the rear end of the left rear side frame 12 .

The side vertical portion 92 is formed in a substantially pentagonal shape and has: a side lateral step portion (horizontal step portion) 98 (also refer to FIG. 5 ) provided at the upper end 92a and extending in the vehicle width direction; a side longitudinal rib (longitudinal rib) 99; and a support portion 101 provided obliquely at the inner end 92b on the inner side in the vehicle width direction.

The lateral step portion 98 is formed substantially horizontally so as to extend in the vehicle width direction, and is arranged on the same line as the upper curved lateral rib 43 of the curved surface portion 42 . That is, the side lateral step portion 98 and the upper curved lateral rib 43 are provided in a substantially horizontal direction aligned state.

By aligning the side lateral step portion 98 and the upper curved lateral bead 43 , the rigidity and strength of the rear outer wall 18 (vehicle rear portion) can be further enhanced by the side lateral step portion 98 and the upper curved lateral bead 43 .

The plurality of side longitudinal ribs 99 are each formed to extend in the vertical direction (approximately vertical direction), and are reinforcing portions concave toward the rear of the vehicle body so as to be able to fit with the plurality of upper longitudinal ribs 87 .

The side longitudinal ribs 99 overlap the upper longitudinal ribs 87 from the front of the vehicle body, whereby the side longitudinal ribs 99 and the upper longitudinal ribs 87 are arranged on the same line. That is, the plurality of side longitudinal ribs 99 and the plurality of upper longitudinal ribs 87 are provided in a substantially vertically aligned state.

By aligning the plurality of side longitudinal ribs 99 and the plurality of upper longitudinal ribs 87, the rigidity and strength of the rear outer wall 18 (rear portion of the vehicle body) can be further improved by the plurality of side longitudinal ribs 99 and the plurality of upper longitudinal ribs 87. .

As shown in FIGS. 4 and 6 , the upper end 101a of the support portion 101 is joined to the upper bulge 38 of the rear panel outer member 21 (general surface 34 ) via the lower flange 51 , and the lower end 101b is joined to the lower bulge 39 .

That is, the support portion 101 is spanned over the upper bulging portion 38 (first outer ridge line 38 a ) and the lower bulging portion 39 (second outer ridge line 39 a ).

The support portion 101 extends to support between the first outer edge line 38a and the second outer edge line 39a.

As a result, the first outer ridgeline 38a and the second outer ridgeline 39a are reinforced by the support portion 101 so that the first outer ridgeline 38a and the second outer ridgeline 39a are prevented from moving toward each other. Accordingly, the rigidity and strength of the rear outer wall 18 (vehicle rear portion) can be further enhanced by the support portion 101 .

As shown in FIGS. 4 and 5 , the bulkhead portion 93 is arranged (installed) substantially horizontally so as to be continuous with the upper reinforcement portion 48 of the rear panel reinforcement 23 .

By providing the bulkhead portion 93 substantially horizontally continuous with the upper reinforcement portion 48 , the corner closed cross section 81 can be partitioned by the bulkhead portion 93 into upper and lower (plural) closed cross sections 105 , 106 .

This increases the resistance to crush deformation of the corner closed cross-section portion 81 (that is, the rear outer wall 18 ), and increases the rigidity and strength of the rear outer wall 18 (vehicle rear portion).

Also, the partition plate portion 93 is integrally provided on the rear panel side extension portion 29 . In this way, the corner closed cross-section portion 81 is partitioned vertically (multiple) by the partition wall portion 93 included in the rear panel side extension portion 29, thereby eliminating the need to separately provide the partition wall portion 93 and reducing the number of parts. increase.

Furthermore, by making the bulkhead portion 93 continuous with the upper reinforcement portion 48 , a load can be favorably transmitted from the upper reinforcement portion 48 to the bulkhead portion 93 .

Thereby, since the load transmission efficiency from the rear panel reinforcement 23 to the rear panel side extension part 29 can be improved, the rigidity and strength of the rear outer wall 18 (vehicle rear part) can be further improved.

As shown in FIGS. 4 and 7 , the first flange 95 protrudes outward in the vehicle width direction from the outer end of the lateral upper surface portion 94 .

The first flange 95 is joined to a flange joining portion 108 formed by a portion near the outer end 34a of the upper end 34b of the normal face portion 34 and a portion closer to the outer end 34a of the upper end 42b of the curved face portion 42 from the front of the vehicle body.

In other words, the first flange 95 is joined to the entire upper end 34 b of the normal surface 34 and the upper end 42 b of the curved surface 42 . Thereby, since the normal surface part 34 and the curved surface part 42 can be reinforced by the 1st flange 95, the rigidity and strength of the rear panel outer member 21 can be further improved.

Here, a torch insertion hole 88 is formed in the upper reinforcing extension portion 28 (upper vertical portion 85 ). Thus, the electrode 91 for spot welding can be inserted into the inside of the closed corner section 81 formed by the upper reinforcement extension 28 , the rear panel side extension 29 and the rear panel outer member 21 through the torch insertion hole 88 . .

Thereby, the first flange 95 can be spot-welded to the flange joining portion 108 from the inner side of the corner closed cross-sectional portion 81 .

The second flange 96 is bent toward the rear of the vehicle body from the upper end of the side standing upper surface portion 94 .

The second flange 96 is joined in a state of being sandwiched between the outer flange 36 of the rear panel outer member 21 and the upper flange 83 of the upper reinforcement extension 28 .

Accordingly, the second flange 96 can be firmly supported by the outer flange 36 and the upper flange 83 . Thereby, the joint strength of the second flange 96 can be increased, and thus the rigidity and strength of the rear panel side extension portion 29 can be increased.

Further, the outer end 92c of the side vertical portion 92 is joined to the curved surface portion 42 of the rear panel outer member 21 from the front of the vehicle body.

Next, an example in which a load is transmitted between the rear panel reinforcement 23 and the rear beam portion 25 will be described based on FIG. 8 .

As shown in FIG. 8 , the upper L-shaped cross-sectional portion 89 is continuously provided with the reinforcing L-shaped cross-sectional portion 56 and the inner L-shaped cross-sectional portion 65 . Furthermore, the third ridgeline 86 is formed continuously with the first ridgeline 52 and the second ridgeline 77 .

Accordingly, the load F1 input to the rear panel reinforcement 23 can be favorably transmitted to the rear beam portion 25 via the first ridgeline 52 , the third ridgeline 86 , and the second ridgeline 77 as indicated by the arrows.

On the other hand, the load F2 input to the rear beam portion 25 can be satisfactorily transmitted to the rear panel reinforcement 23 via the second ridgeline 77 , the third ridgeline 86 , and the first ridgeline 52 as indicated by the arrows.

Thereby, the load transmission efficiency between the rear panel reinforcement 23 and the rear beam part 25 can be improved, and the rigidity and strength of the rear outer wall 18 (vehicle rear part) can be improved.

Next, an example of load transmission from the rear panel reinforcement 23 to the rear panel side extension 29 will be described based on FIG. 9 .

In addition, in FIG. 9, in order to understand load transmission easily, the state which removed the upper reinforcement extension part 28 is shown.

As shown in FIG. 9 , the bulkhead portion 93 of the rear panel side extension portion 29 is substantially horizontally continuous with the upper reinforcement portion 48 of the rear panel reinforcement 23 .

Accordingly, the load F3 input to the upper reinforcement portion 48 can be favorably transmitted to the bulkhead portion 93 as indicated by the arrow. Thereby, the load transmission efficiency from the rear panel reinforcement 23 to the rear panel side extension part 29 can be improved, and the rigidity and strength of the rear outer wall 18 (vehicle rear part) can be improved.

Likewise, the load input to the bulkhead portion 93 can be favorably transmitted to the upper reinforcement portion 48 .

Next, an example in which the first outer edge line 38 a and the second outer edge line 39 a of the rear panel outer member 21 are reinforced by the support portion 101 will be described based on FIG. 10 .

As shown in FIG. 10 , the general surface portion 34 of the rear panel outer member 21 is bent into a substantially "U" shape at the bent portion 34c. Therefore, it is considered that generally the face part 34 is bent in the arrow A direction starting from the bent portion 34c.

Therefore, the support part 101 is bridged over the upper bulging part 38 (1st outer edge line 38a) and the lower bulging part 39 (2nd outer edge line 39a).

Thus, when the load F4 that bends the general surface 34 in the direction of the arrow A starting from the bending portion 34c acts, the first outer ridgeline 38a and the second outer ridge line 38a can be supported by the support portion 101 so as to push upward. 2 Outer ridges 39a.

This prevents the general surface portion 34 from being bent in the direction of the arrow A, so that the rigidity and strength of the rear outer wall 18 (vehicle rear portion) can be increased.

Next, an example in which crush deformation of the rear outer wall 18 is prevented by the bulkhead portion 93 of the rear panel side extension portion 29 will be described based on FIG. 11 .

As shown in FIG. 11 , by welding the first flange 95 of the rear panel side extension 29 to the flange joint 108 of the rear panel outer member 21, the corner closed cross section 81 is partitioned into up and down ( Multiple) closed sections 105, 106.

Accordingly, even when a load F5 is input from the rear of the vehicle body to the corner closed cross-section portion 81 (that is, the rear outer wall 18 ), crush deformation of the rear outer wall 18 (vehicle rear portion) can be prevented.

In addition, the vehicle body rear part structure of this invention is not limited to the said Example, It can change, improve, etc. suitably.

For example, the vehicle body rear structure, vehicle body, rear outer wall, rear panel outer member, rear panel reinforcement, rear beam portion, corner panel, outer L-shaped section, upper curved transverse rib, and reinforced L-shaped section shown in the above-mentioned embodiments part, rear opening, lower closed section, inner L-shaped section, side closed section, corner closed section, upper longitudinal rib, welding torch insertion hole, upper L-shaped section, bulkhead, The shapes and structures of the side lateral step portion, the side longitudinal rib, the support portion, and the like are not limited to the examples, and can be appropriately changed.

Industrial Applicability

The vehicle body rear structure of the present invention can be suitably applied to an automobile in which a rear beam is erected from the rear outer wall of the rear of the vehicle body, and a corner panel is provided at the intersection of the rear outer wall and the rear beam.

Explanation of reference signs

10...rear structure of the vehicle body, 11...body, 14...rear floor, 14a...rear end of the rear floor, 18...rear outer wall, 21...rear panel outer member, 21a...inner surface of the rear panel outer member (vehicle interior side) , 23...rear panel reinforcement, 25...rear beam, 27...corner panel, 28...upper reinforcement extension, 29...rear panel side extension, 31...car interior, 32...vehicle exterior (external), 34...general face , 35... the outer L-shaped section, 35a... the upper end of the outer L-shaped section, 36... the outer flange, 38a... the first outer ridgeline, 39a... the second outer ridgeline, 42... the left and right curved surfaces (curved surface ), 43...the upper curved transverse rib (horizontal rib), 48...the upper reinforced part (upper surface), 48a...the front end of the upper reinforced part, 49...the vertical reinforced part (sagging surface), 52...the first ridge line, 54...opening flange, 54a...lower edge of the opening flange, 54b...side edge of the opening flange, 56...reinforced L-shaped section (L-shaped section), 61...rear opening, 62... Lower closed section, 65...Inner L-shaped section (L-shaped section), 66...Beam side (side), 66a...Tip of beam side, 68...Beam extension surface (extended surface), 75...Side Closed section, 77...second ridgeline, 81...corner closed section, 83...upper flange, 86...third ridgeline, 87...upper longitudinal rib (longitudinal rib), 88...welding torch insertion hole , 89...Upper L-shaped cross-section (L-shaped cross-section), 93...Partition plate, 95...1st flange, 96...2nd flange, 98...Side lateral step (horizontal step), 99 ... side longitudinal ribs (longitudinal ribs), 101 ... support portion.

Claims (7)

1. a vehicle body rear part structure, has:

Rear board external member, it erects upward from the rear end of the rear base plate of vehicle body, and is formed By car room and the outside rear outer wall separated；

Rear board reinforcement, it is bonded in the car indoor profile of this rear board external member, by This, at the lower edge in the rear aperture portion of described vehicle body, structure together with described rear board external member Become the closed section portion, bottom extended along overall width direction；

Back rest portion, it erects above the lateral, overall width direction of described rear board external member, And prolonged along the vertical direction by the lateral margin composition outside the overall width direction in described rear aperture portion The sidepiece closed section portion stretched；And

Edged surface plate, it is bonded in described rear board external member and described back rest portion, thus, It is formed in the concave corner in described rear aperture portion and makes closed section portion, described bottom and institute State closed section portion, continuous print corner of sidepiece closed section portion,

Described vehicle body rear part structure is characterised by,

Described rear board reinforcement includes by the L-shaped cross-section constituted with lower part: upper table Face, it extends from the opening flange portion in described rear aperture portion to vehicle front side；With sagging Face, it hangs down downwards via the 1st crest line between the front end of this upper surface,

Described back rest portion includes by the L-shaped cross-section constituted with lower part: side, its from The described opening flange portion in described rear aperture portion extends to vehicle front；And extended surface, its Extend outside overall width direction via the 2nd crest line between the front end of this side,

Described edged surface plate has:

Upper reinforcement extension, it has and described rear board reinforcement and each L in described back rest portion Shaped sections portion continuous print L-shaped cross-section, has with described in this L-shaped cross-section 1st crest line and described 2nd crest line continuous print the 3rd crest line；With

Rear board side extension, it constitutes described corner Guan Bi together with reinforcement extension on this Cross-section, and there is the partition board portion that described corner closed section part is divided into some.

2. vehicle body rear part structure as claimed in claim 1, it is characterised in that

Described partition board portion configures continuously with the upper surface of described rear board reinforcement.

3. vehicle body rear part structure as claimed in claim 1 or 2, it is characterised in that

Described rear board external member has: typically face, it generally perpendicularly configures；With curved Curved face part, it is arranged on outside the overall width direction of this general face, from described general face court Bend to vehicle front,

Described upper reinforcement extension has for described rear board external member and described rear board Side extension carries out the welding gun inserting hole of spot welding,

Described rear board side extension have described general face and described bending face whole The 1st flange engaged in the range of individual.

4. vehicle body rear part structure as claimed in claim 1, it is characterised in that

Described rear board side extension has the evagination of the upper end being clipped in described rear board external member The 2nd flange engaged between the upper flange of edge and described upper reinforcement extension.

5. vehicle body rear part structure as claimed in claim 1, it is characterised in that

Described rear board side extension along overall width direction extend cross-ties difference portion and described after The transverse stiffener rib extended along the overall width direction alignment of plate external member.

6. vehicle body rear part structure as claimed in claim 1, it is characterised in that add on described The vertically extending longitudinal rein forcement of strong extension and the edge of described rear board side extension The longitudinal rein forcement alignment that above-below direction extends.

7. vehicle body rear part structure as claimed in claim 1, it is characterised in that

Described rear board external member has: the 1st outer crest line, and it extends along overall width direction；With 2nd outer crest line, its in the lower section of the 1st outer crest line along overall width direction extend,

Described rear board side extension has with at described 1st outer crest line and described 2nd outer rib The support that the mode carrying out supporting between line extends.