WO2020110469A1

WO2020110469A1 - Vehicle body side part structure

Info

Publication number: WO2020110469A1
Application number: PCT/JP2019/039624
Authority: WO
Inventors: 大輔海老原
Original assignee: 本田技研工業株式会社
Priority date: 2018-11-26
Filing date: 2019-10-08
Publication date: 2020-06-04
Also published as: CN215475381U; JP7055221B2; JPWO2020110469A1

Abstract

A vehicle body side part structure (10) comprises a rear wheelhouse outer (34), a quarter pillar inner (45), a roof side rail (15), and a rear wheelhouse reinforcement member (18). The quarter pillar inner is joined to the front upper part of the rear wheelhouse outer, and is formed in an open cross-section of an outward-facing opening that has a hat-shaped cross section. The roof side rail is joined to the upper-end part of the quarter pillar inner. The rear wheelhouse reinforcement member is overlaid on the front part of the rear wheelhouse outer and forms a closed-cross-section framework (50). The closed cross-section of the closed-cross-section framework gradually converges toward the open cross-section of the quarter pillar inner, and the area of the closed cross-section is reduced.

Description

Body side structure

The present invention relates to a vehicle body side structure.
The present application claims priority based on Japanese Patent Application No. 2018-220712 filed on November 26, 2018, the content of which is incorporated herein by reference.

As the vehicle body side structure, it is known that the rear part of the side sill and the quarter pillar reinforce are joined via the quarter lock pillar reinforce. The joint portion between the quarter pillar reinforcement and the quarter lock pillar reinforcement is formed in a V shape. Therefore, the joint portion is a portion where stress is likely to concentrate when a load is input due to a side collision, for example.

The quarter pillar reinforcement is formed by a first reinforcement and a second reinforcement. At the joining portion, the second reinforcement is overlapped and joined to the quarter pillar reinforcement. Further, at a position relatively close to the joining portion, the second reinforcement is overlapped and joined to the first reinforcement.
That is, the plate thickness is increased by superimposing the two members at the joint and at a position relatively close to the joint, and the rigidity of the joint is secured. Thereby, for example, it is possible to suppress the deformation of the joint portion when the load is input by the side collision load and to secure the vehicle body rigidity (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2016-43765

However, the vehicle body side structure of Patent Document 1 requires three members, a quarter pillar reinforcement, a first reinforcement, and a second reinforcement to secure the rigidity of the joint (that is, the rigidity of the vehicle body). To do. Therefore, the weight of the vehicle body is increased, and there is room for improvement from this viewpoint.
Aspects of the present invention have been made in view of the above circumstances, and an object of the present invention is to provide a vehicle body side structure capable of reducing the weight of a vehicle body and ensuring vehicle body rigidity.

(1) A vehicle body side structure according to one aspect of the present invention is formed with an outer cross section of a rear wheel house outer; an outer opening joined to a front upper portion of the rear wheel house outer and having a hat-shaped cross section. A quarter pillar inner; a roof side rail joined to an upper end portion of the quarter pillar inner and extending in a vehicle body front-rear direction; And;; the skeleton of the closed cross section defines a closed cross section, and the closed cross section gradually converges toward the open cross section of the quarter pillar inner to reduce the area of the closed cross section.

In this manner, the rear wheel house reinforcing member is superposed on the front portion of the outer rear wheel house to form a skeleton having a closed cross section. Thereby, for example, the rigidity of the vehicle body can be secured against the load of a side collision.
The closed cross section was gradually converged toward the quarter pillar inner to reduce the area of the closed cross section. As a result, the reinforcing member of the quarter pillar inner can be eliminated, and the weight of the vehicle body can be reduced.

(2) In the vehicle body side structure, the rear wheel house reinforcing member may include at least two members, an upper reinforcing member and a lower reinforcing member, and the upper reinforcing member may have lower strength than the lower reinforcing member.

For example, if the upper reinforcing member and the lower reinforcing member have the same strength, it is difficult to suitably crush the skeleton of the closed cross section inward in the vehicle width direction when a load is input to the skeleton of the closed cross section due to a side collision of the vehicle. A rear end portion of the side sill is connected to a lower front portion of the outer rear wheel house and a lower end portion of the rear wheel house reinforcing member. Therefore, it is difficult to preferably crush the rear end portion of the side sill by the input load. Therefore, it is difficult to uniformly crush and deform the side sill inward in the vehicle width direction by the load input by the side collision.

Therefore, in the vehicle body side structure of the above (2), the strength of the upper reinforcing member is set lower than that of the lower reinforcing member.
Therefore, when the load is applied to the skeleton having the closed cross section due to the side collision of the vehicle, the upper reinforcing member can be appropriately deformed. By suitably deforming the upper reinforcing member, the skeleton of the closed cross section can be appropriately deformed so as to be crushed inward in the vehicle width direction. Accordingly, the rear end portion of the side sill can be suitably deformed inward in the vehicle width direction, and the side sill can be uniformly deformed inward in the vehicle width direction.

(3) In the vehicle body side structure, the quarter pillar inner has a front leg portion, and a rear leg portion that is disposed rearward of the front leg portion in the vehicle body and has a leg length dimension larger than that of the front leg portion, The rear leg portion may be coupled to the roof arch via a roof side rail inner of the roof side rail and a rail reinforcing member.

In this way, the leg length dimension of the rear leg portion is made larger than that of the front leg portion. As a result, the leg length dimension of the front leg portion can be suppressed to be small, and the weight of the vehicle body can be reduced.
Further, the rear legs are connected to the roof arch via the roof side rail inner and the rail reinforcing member. Therefore, the load input by the side collision of the vehicle can be transmitted to the roof arch via the rear leg (that is, the quarter pillar inner), the roof side rail inner, and the rail reinforcing member. As a result, the load input by the side collision can be supported by the roof arch.

(4) In the vehicle body side portion structure, the quarter pillar inner portion is formed by stacking the quarter pillar outer portions of the side outer panels forming the design surface on the vehicle width direction outer side from the vehicle width direction outer side. You may form a closed cross section with it.

　In this way, by overlapping the quarter pillar inner and the quarter pillar outer parts, the strength of the quarter pillar inner can be increased. As a result, the load input by the side collision of the vehicle can be appropriately transmitted to the roof arch via the quarter pillar inner.

(5) In the vehicle body side portion structure, the lower reinforcing member extends to the rear tire and the rear door opening, and the lower leg portion extends from the lower leg portion in the vehicle width direction. A lower crest having a width dimension larger than that of the leg and a bead extending in the vehicle width direction may be provided on the lower crest.

In this way, the width dimension of the lower top is made larger than the lower leg. Therefore, the height dimension of the lower leg portion extending in the direction of the rear tire and the rear door opening can be reduced. Thereby, for example, the degree of freedom in design can be increased when determining the shape of the rear door opening. Also, beads were formed on the top of the lower. Thereby, the lower top can be reinforced with the bead, and the strength of the lower top can be secured.

(6) In the vehicle body side structure, the upper reinforcing member is erected from the upper end portion of the lower reinforcing member, and the lower reinforcing member is formed such that the width dimension of the lower top is substantially constant, and the upper reinforcing member is formed. The member may have an upper top portion connected to the lower top portion, and the width dimension of the upper top portion may be gradually reduced to match the width dimension of the quarter pillar inner.

In this way, the upper top of the upper reinforcing member was extended from the lower top, and the width dimension of the upper top was gradually reduced so as to match the quarter pillar. As a result, the rear wheel house reinforcing member can be provided without affecting the vehicle body design or the vehicle interior space.

(7) In the vehicle body side structure, a front end portion of the lower reinforcing member is joined to a rear end portion of a side sill stiffener, the lower leg portion is provided on an outer side of the lower top portion, and a lower outer wall is formed. The lower reinforcing member has an opening formed in a front portion of the lower outer wall near the rear end of the side sill stiffener, and has a side sill inner portion at a position inside the vehicle width direction facing the opening. The rear portion and the rear wheel house inner are overlapped in the vehicle width direction, and the portion where the rear portion of the side sill inner and the rear wheel house inner are overlapped passes through the center of the opening and is orthogonal to the lower outer wall. And a second welding surface that passes through the center of the opening and inclines with the lower outer wall.

In this way, the opening was formed in the front portion of the lower outer wall of the lower reinforcing member, which was close to the rear end of the side sill stiffener. Moreover, it has a first welding surface and a second welding surface at a position facing the opening. Therefore, the welding gun can be inserted through the opening and brought into contact with the first welding surface and the second welding surface.
Thereby, for example, in a state where the lower outer wall of the lower reinforcing member is arranged outside the side sill inner in the vehicle width direction, the rear part of the side sill inner and the rear wheel house inner are connected to the first welding surface and the second welding surface. Welding can be performed on the welding surface and the strength of the vehicle body can be increased.

(8) In the vehicle body side structure, the lower reinforcing member may have a front end portion of the lower outer wall and a rear end portion of the side sill stiffener fixed by a fastener.

In this way, the rear end of the lower outer wall of the lower reinforcing member and the rear end of the side sill stiffener were fixed with fasteners. Here, a skeleton having a closed cross section is formed by the lower reinforcing member and the front portion of the rear wheel house. Therefore, the rear end of the side sill stiffener is firmly coupled (supported) with the skeleton of the closed cross section. This makes it possible to generate a sufficient reaction force against the load caused by the side collision of the vehicle.

(9) In the vehicle body side part structure, the side sill stiffener and the side sill inner are overlapped in the vehicle width direction to form a side sill closed cross section, and the skeleton of the closed cross section is connected to the side sill closed cross section. Good.

　In this way, the side-sill closed cross-section can be reinforced with the closed-section skeleton by connecting the side-sill closed cross-section to the closed-section skeleton. As a result, the strength and rigidity of the rear portion of the side sill can be increased, and a sufficient reaction force can be generated against the load due to the side collision.

(10) In the vehicle body side structure, the side outer panel and the rear wheel house outer form a wheel house closed cross-section including the skeleton of the closed cross section, and the wheel house closed cross section extends in the vehicle longitudinal direction. A front bulkhead and a rear bulkhead that are provided at intervals to form a foaming agent disposition space, and a foaming agent injection port that faces the foaming agent disposition space may be provided.

In this way, the front bulkhead and the rear bulkhead are provided in the skeleton of the closed cross section to form the foaming agent placement space. Further, a foaming agent injection port facing the foaming agent arrangement space was formed. The foaming agent is injected into the foaming agent arrangement space from the foaming agent injection port to fill the space. As a result, the filled foaming agent can supplement the strength and rigidity of the skeleton having a closed cross section, and can suppress the transmission of vibrations from the rear tire or the like to the passenger compartment.

According to the aspect of the present invention, the rear wheel house reinforcing member is superposed on the front portion of the outer rear wheel house to form a skeleton having a closed cross section. The closed cross section was gradually converged toward the quarter pillar inner to reduce the area of the closed cross section. As a result, the weight of the vehicle body can be reduced and the vehicle body rigidity can be secured.

It is an exploded perspective view showing a vehicle body side part structure of an embodiment concerning the present invention. It is the perspective view which expanded the II section of FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 2. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2. FIG. 5 is a sectional view taken along line VV of FIG. 2. FIG. 6 is a sectional view taken along line VI-VI of FIG. 2. FIG. 7 is a sectional view taken along the line VII-VII of FIG. 2. FIG. 9 is a sectional view taken along the line VIII-VIII in FIG. 2. It is sectional drawing which follows the IX-IX line of FIG. It is a perspective view which expanded the rear wheel house reinforcement member of FIG. It is a disassembled perspective view which shows the side sill and lower reinforcement member of FIG. FIG. 11 is a sectional view taken along line XII-XII in FIG. 10. It is a perspective view which expanded the XIII part of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side of the vehicle, and arrow LH indicates the left side of the vehicle.
FIG. 1 is an exploded perspective view showing a vehicle body side part structure 10 according to an embodiment of the present invention. FIG. 2 is an enlarged perspective view of the II portion of FIG.
As shown in FIGS. 1 and 2, the vehicle body side structure 10 includes a side sill 12, a rear wheel house 13, a quarter pillar 14, a roof side rail 15, a roof arch 16, a side outer panel 17, and a rear wheel. The house reinforcing member 18 is provided.
The side outer panel 17 is a panel that forms a design surface on the outer side in the vehicle width direction. The side outer panel 17 has a side sill outer panel portion 17a, a rear wheel outer portion 17b, a quarter pillar outer portion 17c, and a roof side rail outer portion 17d.

FIG. 3 is a sectional view taken along the line III-III in FIG. Note that FIG. 3 shows a state in which the side sill outer panel portion 17a is joined to the side sill stiffener 23.
As shown in FIGS. 2 and 3, the side sill 12 is disposed, for example, on the left side in the vehicle width direction of the vehicle body and extends in the vehicle body front-rear direction. The side sill 12 includes a side sill inner 22, a side sill stiffener 23, and a side sill outer panel portion 17a.
The side sill 12 is formed of a side sill inner 22 and a side sill stiffener 23 in a rectangular frame-shaped closed cross section 24. The side sill stiffener 23 is covered with the side sill outer panel portion 17a from the outside of the vehicle. Hereinafter, the rectangular frame-shaped closed cross section 24 is referred to as a "side sill closed cross section 24".

The side sill stiffener 23 has a stiffener outer wall 25, a stiffener upper wall 26, a stiffener lower wall 27, a stiffener upper flange 28, and a stiffener lower flange 29.
The stiffener upper wall 26 extends from the upper side of the stiffener outer wall 25 toward the inner side in the vehicle width direction (that is, the side sill inner 22 side). A stiffener lower wall 27 extends from the lower side of the stiffener outer wall 25 toward the vehicle width direction inner side (that is, the side sill inner 22 side). A stiffener upper flange 28 extends upward from the inner side of the stiffener upper wall 26. A stiffener lower flange 29 extends downward from the inner side of the stiffener lower wall 27.

The side sill stiffener 23 has a hat-shaped cross section formed by a stiffener outer wall 25, a stiffener upper wall 26, a stiffener lower wall 27, a stiffener upper flange 28, and a stiffener lower flange 29.
The stiffener upper flange 28 and the stiffener lower flange 29 are joined to the side sill inner 22 in a state of being superposed from the outside in the vehicle width direction. As a result, the side sill 12 has the side sill stiffener 23 and the side sill inner 22 forming the side sill closed cross section 24 in a rectangular frame shape.
A rear wheel house 13 is connected to a rear end portion 12a of the side sill 12.

FIG. 4 is a sectional view taken along line IV-IV in FIG. Note that FIG. 4 shows a state in which the rear wheel house outer portion 34 and the rear wheel outer portion 17b are joined.
As shown in FIGS. 2 and 4, the rear wheel house 13 is formed to cover the rear tire 32 (see FIG. 1). The rear wheel house 13 includes a rear wheel house outer 34, a rear wheel house inner 35, and a rear wheel outer portion 17b. The rear wheel house outer 34 is formed so as to cover the upper outside of the rear tire 32. A front end portion 34a of the rear wheel house outer 34 is joined to a rear end portion 12a of the side sill 12. The rear wheel house outer 34 has a wheel house front portion 37, a wheel house inner flange 38, and a wheel house outer flange 39.

The wheel house front part 37 is inclined toward the rear upper part of the vehicle body from the rear end part 12a of the side sill 12 to the front upper part (upper extension part) 13a of the rear wheel house 13 in a state of being arranged in the vehicle width direction. It is extended. A wheel house inner flange 38 extends upward from the inner side of the wheel house front portion 37. A wheel house outer flange 39 extends downward from the outer edge of the wheel house front portion 37.
The wheel house front part 37, the wheel house inner flange 38, and the wheel house outer flange 39 form a front part 42 of the rear wheel house outer 34. Hereinafter, the front portion 42 of the rear wheel house outer 34 will be referred to as a "reinforcing member support portion 42".
The rear wheel house reinforcing member 18 is supported by the reinforcing member support portion 42. The rear wheel house reinforcing member 18 will be described in detail later.

The flange 35a of the rear wheel house inner 35 is joined to the rear wheel house outer 34 from the inside in the vehicle width direction. The rear wheel house inner 35 is arranged inside the rear wheel house outer 34 in the vehicle width direction, and is formed so as to cover the upper inside of the rear tire 32 (see FIG. 1 ).
Since the rear wheel outer portion 17b is joined to the rear wheel house outer portion 34 from the outside in the vehicle width direction, a closed cross section 78 is formed by the rear wheel house outer portion 34 and the rear wheel outer portion 17b. Hereinafter, this closed section 78 will be referred to as "wheel house closed section 78".

FIG. 5 is a sectional view taken along the line VV of FIG. Note that FIG. 5 shows a state in which the rear wheel house outer portion 34 and the rear wheel outer portion 17b are joined.
As shown in FIGS. 2 and 5, in the rear wheel house inner 35, the front end portion 35b of the flange 35a is joined to the rear portion 22a of the side sill inner 22 so as to be superposed from the inside in the vehicle width direction.
The joining of the front end portion 35b of the flange 35a of the rear wheel house inner 35 and the rear portion 22a of the side sill inner 22 will be described in detail later.
Of the rear wheel house outer 34, the quarter pillar 14 is raised from a front upper portion (upward extension portion) 34b near the rear damper housing 41.

FIG. 6 is a sectional view taken along the line VI-VI of FIG. Note that FIG. 6 shows a state in which the quarter pillar inner portion 45 is joined to the quarter pillar outer portion 17c.
As shown in FIGS. 2 and 6, the quarter pillar 14 includes a quarter pillar inner 45 and a quarter pillar outer portion 17c. A lower end portion of the quarter pillar inner 45 is joined to the front upper portion 34b of the rear wheel house outer 34. An upper end portion 45a of the quarter pillar inner 45 is joined to the roof side rail 15. The quarter pillar inner 45 extends from the front upper portion 34b of the rear wheel house outer 34 toward the roof side rail 15 in the front of the vehicle body and in the upward direction in an inclined shape.

The quarter pillar inner 45 has a pillar bottom portion 45b, a pillar front leg portion (front leg portion) 45c, a pillar rear leg portion (rear leg portion) 45d, a pillar front flange 45e, and a pillar rear flange 45f.
The pillar bottom portion 45b is arranged in the front-rear direction of the vehicle body. A pillar front leg portion 45c is connected to the front side of the pillar bottom portion 45b. The pillar front leg portion 45c is projected from the front side of the pillar bottom portion 45b toward the vehicle width direction outer side in a front leg length dimension (leg length dimension) L1. The pillar rear leg portion 45d is connected to the inner side of the pillar bottom portion 45b.

The pillar rear leg portion 45d extends from the rear side of the pillar bottom portion 45b outward in the vehicle width direction to the rear leg length dimension (leg length dimension) L2, and is arranged behind the pillar front leg portion 45c in the vehicle body. The pillar rear leg portion 45d is formed such that the rear leg length dimension L2 is larger than the front leg length dimension L1 of the pillar front leg portion 45c. Accordingly, the leg length dimension L1 of the pillar front leg portion 45c can be suppressed to be small, and the weight of the vehicle body can be reduced.
A pillar front flange 45e extends from the outer side of the pillar front leg portion 45c toward the front of the vehicle body. A pillar rear flange 45f extends from the outer side of the pillar rear leg portion 45d toward the rear of the vehicle body.
The quarter pillar inner 45 is formed by a pillar bottom portion 45b, a pillar front leg portion 45c, a pillar rear leg portion 45d, a pillar front flange 45e, and a pillar rear flange 45f into an open cross section having a hat-shaped cross section and an outward opening. ing. Hereinafter, the open cross section of the quarter pillar inner 45 is referred to as a “pillar open cross section”.

The quarter pillar outer portion 17c is superposed on the quarter pillar inner 45 from the outside in the vehicle width direction. The quarter pillar outer portion 17c is joined to the pillar front flange 45e and the pillar rear flange 45f. Therefore, a closed cross section is formed by the quarter pillar inner 45 and the quarter pillar outer portion 17c. Thereby, the quarter pillar inner 45 is reinforced by the quarter pillar outer portion 17c, and the strength of the quarter pillar inner 45 (that is, the quarter pillar 14) is increased.
The quarter pillar outer portion 17c is a member forming a part of the side outer panel 17 (see also FIG. 1). The upper end 45 a of the quarter pillar inner 45 is joined to the roof side rail 15.

FIG. 7 is a sectional view taken along the line VII-VII of FIG. Note that FIG. 7 shows a state where the roof side rail outer portion 17d is joined to the roof side rail outer 47.
As shown in FIGS. 2 and 7, the roof side rail 15 is joined to the upper end portion 45a of the quarter pillar inner 45 and extends in the vehicle front-rear direction. The roof side rail 15 includes a roof side rail inner 46, a roof side rail outer 47, a rail reinforcing member 48, and a roof side rail outer portion 17d.

The roof side rail inner 46 is connected to the upper end portion 45a of the quarter pillar inner 45. The roof side rail outer 47 is joined to the roof side rail inner 46 from the outside in the vehicle width direction, so that the roof side rail 15 is formed in a closed cross section by the roof side rail inner 46 and the roof side rail outer 47. A rail reinforcing member 48 is joined to the roof side rail inner 46 inside the closed cross section. The roof side rail outer 47 is covered with the roof side rail outer portion 17d of the side outer panel 17 from the vehicle width direction outer side.

The rail reinforcing member 48 is joined to the left end portion 16a of the roof arch 16 via the roof side rail inner 46. The roof arch 16 is laid across the left roof side rail 15 and the right roof side rail by being joined to the left roof side rail 15 and the right roof side rail (not shown).
The upper end 53a of the pillar rear leg portion 45d of the quarter pillar inner 45 is joined to the rail reinforcing member 48 via the roof side rail inner 46. Therefore, the pillar rear leg portion 45 d of the quarter pillar inner 45 is coupled to the roof arch 16 via the roof side rail inner 46 of the roof side rail 15 and the rail reinforcing member 48.

Accordingly, the load input by the side collision of the vehicle can be transmitted to the roof arch 16 via the pillar rear leg portion 45d (that is, the quarter pillar inner 45), the roof side rail inner 46, and the rail reinforcing member 48. Therefore, the load F1 input by the side collision can be supported by the roof arch 16.
In addition, the quarter pillar inner 45 is reinforced by the quarter pillar outer portion 17c, so that the strength of the quarter pillar inner 45 is increased. Accordingly, the load F1 input by the side collision of the vehicle can be suitably transmitted to the roof arch 16 via the quarter pillar inner 45.

FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. FIG. 9 is a sectional view taken along line IX-IX in FIG. In FIG. 9, the rear wheel house outer 34 is joined to the rear wheel outer portion 17b.
As shown in FIGS. 2, 8 and 9, the rear wheel house reinforcing member 18 is superposed on the reinforcing member support portion 42 of the rear wheel house outer 34 in front of the vehicle body and obliquely from above. As a result, the reinforcing member support portion 42 of the rear wheel house outer 34 and the rear wheel house reinforcing member 18 form a skeleton 50 (see also FIG. 12) having a closed cross section. Hereinafter, the skeleton 50 having a closed cross section will be referred to as a “closed cross section skeleton 50”.
The rear wheel house reinforcing member 18 includes a lower reinforcing member 51 and an upper reinforcing member 52.

FIG. 10 is an enlarged perspective view of the rear wheel house reinforcing member 18 of FIG. FIG. 11 is an exploded perspective view showing the side sill 12 and the lower reinforcing member 51 of FIG. FIG. 12 is a sectional view taken along the line XII-XII in FIG.
As shown in FIGS. 10, 11 and 12, the lower reinforcing member 51 has a front end portion 51 a joined to a rear end portion 12 a of the side sill 12 and is attached to a rear portion of the vehicle body along the reinforcing member supporting portion 42 of the rear wheel house outer 34. It extends obliquely upward. The lower reinforcing member 51 includes a lower top portion 53, a lower leg portion 54, a lower outer flange 55, a lower inner flange 56, and a plurality of beads 57.

The lower apex 53 is arranged at an upper front side of the vehicle body with respect to the front part 37 of the wheel house, and is formed substantially constant so as to have a width dimension W1 in the vehicle width direction. The lower top portion 53 extends along the front portion of the wheel house 37 from the front end portion 34a of the rear wheel house outer portion 34 to the front upper portion 34b in an inclined shape toward the rear upper side of the vehicle body. In other words, the lower reinforcing member 51 projects from the lower leg portion 54 inward in the vehicle width direction.

A plurality of openings 66 are formed in the lower top portion 53 at intervals from the front end portion to the rear end portion of the lower top portion 53. A bead 57 is formed between the adjacent openings 66 in the vehicle width direction. The bead 57 is formed, for example, at a portion that is bulged upward with respect to the lower top portion 53. That is, a plurality of beads 57 are formed on the lower top portion 53 at intervals between the openings 66 in the vehicle width direction.

The lower leg portion 54 extends downward from the outer side of the lower top portion 53 toward the rear tire 32 (see FIG. 1). The lower leg portion 54 extends from the outer side of the lower top portion 53 to the wheel house front portion 37 so that the height dimension becomes H1 in the direction connecting the center of the rear tire 32 and the rear door opening portion 63. That is, the lower leg portion 54 forms the “lower outer wall” of the lower reinforcing member 51. Hereinafter, the lower leg portion 54 may be referred to as the "lower outer wall 54".
The direction of the rear tire 32 and the rear door opening 63 means a direction intersecting with the wheel house front portion 37 and the lower top portion 53.

A lower outer flange 55 extends from the lower side of the lower leg portion 54 toward the vehicle width direction outer side along the wheel house front portion 37. The lower outer flange 55 is joined to the wheel house front portion 37.
A lower inner flange 56 extends upward from the inner side of the lower top portion 53 along the wheel house inner flange 38. The lower inner flange 56 is joined to the wheel house inner flange 38. As described above, the lower outer flange 55 is joined to the wheel house front portion 37, and the lower inner flange 56 is joined to the wheel house inner flange 38, so that the lower reinforcing member 51 is joined to the reinforcing member supporting portion of the rear wheel house outer 34. It is joined along 42. In this state, the front end portion 51a of the lower reinforcing member 51 is arranged inside the side sill 12 (specifically, the rear end portion 12a).

As shown in FIGS. 4 and 10, in the lower reinforcing member 51, the width dimension W1 of the lower top portion 53 is set to be larger than the height dimension H1 of the lower leg portion 54 in the other portion 51b of the front end portion 51a. Therefore, the height dimension H1 of the lower leg portion can be kept small. Thereby, for example, the degree of freedom in design can be increased when determining the shape of the rear door opening 63 (see FIG. 11 ).
Further, the lower reinforcing member 51 has a plurality of beads 57 extending in the vehicle width direction on the lower top portion 53. As a result, the lower top portion 53 can be reinforced by the plurality of beads 57 against the load F2 input by the side collision of the vehicle, and the strength of the lower top portion 53 can be secured.

An example of joining the front end portion 35b of the rear wheel house inner 35 and the rear portion 22a of the side sill inner 22 will be described in detail with reference to FIGS. 5 and 13.
FIG. 13 is an enlarged perspective view of the XIII portion of FIG.
As shown in FIGS. 5 and 13, the lower reinforcing member 51 is joined to the rear end portion 23a of the side sill stiffener 23 from the inside in a state where the front end portion 51a is arranged inside the rear end portion 23a of the side sill stiffener 23. ing. It should be noted that this joining may be omitted, but it is sufficient to join the nut 71 and the bolt 72, which will be described later. Further, the lower leg portion 54 constitutes the lower outer wall 54.

The lower reinforcing member 51 has an opening 65 (see also FIG. 13) formed in the lower outer wall 54. The opening portion 65 is formed in the front portion 54a of the lower outer wall 54 near the rear end portion 25a of the stiffener outer wall 25 of the side sill stiffener 23. In this state, the opening portion 65 is located inside the vehicle width direction so as to face the portion 67 where the front end portion 35b of the flange 35a of the rear wheel house inner 35 (see FIG. 4) and the rear portion 22a of the side sill inner 22 are overlapped with each other. It is located in. Hereinafter, the overlapped portion 67 will be abbreviated as "overlapping portion 67".
The overlapping portion 67 has a first welding surface 67a and a second welding surface 67b. The first welding surface 67 a is a surface that passes through the center 68 of the opening 65 and is orthogonal to the lower outer wall 54.
The second welding surface 67b is a surface that passes through the center 68 of the opening 65 and is inclined with respect to the lower outer wall 54.

In this way, the opening 65 is arranged at a position facing the overlapping portion 67, and the overlapping portion 67 has the first welding surface 67a and the second welding surface 67b. Therefore, the welding gun can be inserted from the opening 65 through the center 68 in the direction of the arrow A orthogonal to the lower outer wall 54 and brought into contact with the first welding surface 67a. Further, the welding gun can be inserted from the opening portion 65 through the center 68 in the direction of the arrow B that is inclined with respect to the lower outer wall 54 and brought into contact with the second welding surface 67b.
Thereby, for example, in a state where the lower outer wall 54 is arranged on the outer side in the vehicle width direction of the side sill inner 22, two welding surfaces of the first welding surface 67a and the second welding surface 67b of the overlapping portion 67 can be welded, The strength of the vehicle body can be increased.

As shown in FIGS. 3 and 11, in the lower reinforcing member 51, a nut 71 is welded to the front portion 54a of the lower outer wall 54 near the rear end portion 25a of the stiffener outer wall 25 of the side sill stiffener 23 from the inside in the vehicle width direction. Has been done. The front portion 54a of the lower outer wall 54 is superposed on the rear end portion 25a of the stiffener outer wall 25 of the side sill stiffener 23 from the inside in the vehicle width direction. In this state, the bolt 72 is screwed to the nut 71 from the outside in the vehicle width direction so that the front end portion 54b of the lower outer wall 54 is fastened to the rear end portion 25a of the stiffener outer wall 25 with the bolt 72 and the nut 71 (fastener). Has been done. As a result, the front portion 54a of the lower outer wall 54 and the rear end portion 23a of the side sill stiffener 23 are fixed by the bolt 72 and the nut 71.

The lower reinforcing member 51 and the reinforcing member supporting portion 42 form a closed cross-section skeleton 50. Therefore, the rear end portion 23a of the side sill stiffener 23 is firmly coupled (supported) with the closed cross-section skeleton 50. As a result, a sufficient reaction force can be generated against the load F3 due to the side collision of the vehicle.
The side sill 12 is formed by a side sill stiffener 23 and a side sill inner 22 in a rectangular frame-shaped closed cross section 24. Hereinafter, the rectangular frame-shaped closed cross section 24 is referred to as a "side sill closed cross section 24". A closed cross-section skeleton 50 is continuous with the side sill closed cross section 24.
As described above, by making the closed cross-section skeleton 50 continuous with the side sill closed cross section 24, the side sill closed cross section 24 can be reinforced by the closed cross section skeleton 50. As a result, the strength and rigidity of the rear end portion 12a of the side sill 12 can be increased, and a sufficient reaction force can be generated against the load F3 due to the side collision.

As shown in FIGS. 11 and 13, the wheel house closed section 78 (see also FIG. 4) is formed by the rear wheel outer portion 17b of the side outer panel 17 and the rear wheel house outer 34. The closed cross-section skeleton 50 is built in the wheel house closed cross-section 78.
A front bulkhead 82 and a rear bulkhead 83 are provided inside the wheel house closed cross section 78. In the front bulkhead 82 and the rear bulkhead 83, the front bulkhead flange 82a and the rear bulkhead flange 83a are joined to the closed cross-section skeleton 50 and the wheel house front portion 37 at intervals in the vehicle front-rear direction.

Therefore, the front bulkhead 82 and the rear bulkhead 83 are housed inside the wheel house closed cross section 78. In this state, the wheel house closed section 78 is partitioned by the front bulkhead 82 and the rear bulkhead 83. Thereby, inside the wheel house closed cross section 78, a foaming agent placement space 85 is formed between the front bulkhead 82 and the rear bulkhead 83.

A foaming agent injection port 86 is provided at a position facing the foaming agent placement space 85. The foaming agent inlet 86 is formed in the front portion (downward extension portion) 13b of the rear wheel house 13. Therefore, the foaming agent is injected from the foaming agent injection port 86 into the foaming agent arrangement space 85 as indicated by the arrow C, and the foaming agent arrangement space 85 is filled with the foaming agent. As a result, it is possible to supplement the strength and rigidity of the closed cross-section skeleton 50 with the filled foaming agent and suppress the transmission of vibrations from the rear tire 32 (see FIG. 1) and the like to the vehicle interior.

As shown in FIGS. 9, 8 and 10, an upper reinforcing member 52 is erected from the rear end portion (upper end portion) 51 c of the lower reinforcing member 51 along the quarter pillar inner 45. The upper reinforcing member 52 has an upper top portion 91, an upper leg portion 92, an upper inner flange 93, and an upper outer flange 94.
A front end portion 91 a of the upper top portion 91 is connected to a rear end portion 53 c of the lower top portion 53. The width dimension W2 of the upper apex portion 91 in the vehicle width direction gradually decreases from the front end portion 91a toward the rear end portion 91b, and matches the width dimension W3 of the quarter pillar 14 in the vehicle width direction.

Upper leg portions 92 project from the outer periphery of the upper top portion 91 toward the rear side of the vehicle body. An upper outer flange 94 extends from the outer side of the upper leg portion 92 toward the outer side in the vehicle width direction. The outer outer flange 94 has an outer peripheral portion 94 a joined to the front upper portion 34 b of the rear wheel house outer 34 and the quarter pillar inner 45.
An upper inner flange 93 extends from the inner side of the upper top portion 91 toward the rear side of the vehicle body. An outer peripheral portion 93 a of the upper inner flange 93 is joined to the front upper portion 34 b of the rear wheel house outer 34 and the quarter pillar inner 45.

The upper reinforcing member 52 is joined to the front upper portion 34b of the rear wheel house outer 34 and the quarter pillar inner 45 so as to face the open pillar section of the quarter pillar inner 45 (see also FIG. 6). .. A closed cross section 96 is formed by the upper reinforcing member 52 and the front upper portion 34 b of the rear wheel house outer 34. Hereinafter, the closed cross section 96 will be referred to as "upper closed cross section 96".
In this state, the width dimension W2 of the upper top portion 91 is gradually reduced from the front end portion 91a toward the rear end portion 91b, and is set so as to match the width dimension W3 of the quarter pillar 14. Therefore, the upper closed cross section 96 is formed so as to gradually converge toward the pillar open cross section of the quarter pillar inner 45 so that the area of the upper closed cross section 96 decreases.

The upper reinforcing member 52 is connected to the lower reinforcing member 51. The upper closed section 96 forms the upper part of the closed section skeleton 50. Therefore, the closed cross-section skeleton 50 is formed so that the area of the closed cross section is reduced by gradually converging the upper part toward the pillar open cross section of the quarter pillar inner 45. The rear wheel house 13 and the quarter pillar inner 45 are reinforced by a closed cross-section skeleton 50. Thereby, for example, the rigidity of the vehicle body is secured against the load F2 of the side collision.
In addition, the upper portion of the closed cross-section skeleton 50 (that is, the upper closed cross-section 96) is gradually converged toward the quarter pillar inner 45 to reduce the area of the upper portion of the closed cross-section skeleton 50.
As a result, the reinforcing member can be removed from the quarter pillar inner 45, and the weight of the vehicle body can be reduced.
Further, by gradually converging the upper portion of the closed cross-section skeleton 50 (upper closed cross-section 96) toward the quarter pillar inner 45 to gradually reduce the area, the rear wheel is not affected without affecting the vehicle body design or the vehicle interior space. A house reinforcing member 18 can be provided.

Further, the upper reinforcing member 52 is gradually converged toward the quarter pillar inner 45 to reduce the area thereof. On the other hand, the lower reinforcing member 51 is formed so that the area of the closed cross section is constant. As a result, the strength of the upper reinforcing member 52 is set lower than that of the lower reinforcing member 51.
In other words, in the closed cross-section skeleton 50, the upper part (upper closed cross-section 96) is formed to have lower strength than other parts.

The reason why the upper portion of the closed cross-section skeleton 50 (upper closed cross-section 96) is set to have a lower strength than other parts is as follows.
That is, for example, when the lower reinforcing member 51 and the upper reinforcing member 52 have the same strength, when the load F3 is input to the closed cross-section skeleton 50 due to the side collision of the vehicle, the closed cross-section skeleton 50 is favorably located inside the vehicle width direction. Difficult to crush. Here, the rear end portion 12a of the side sill 12 is connected to the closed cross-section skeleton 50. Therefore, it is difficult to preferably crush the rear end portion 12a of the side sill 12 by the input load F3. Therefore, it is difficult to uniformly deform the side sill 12 inward in the vehicle width direction by the load F3 input by the side collision.

Therefore, the strength of the upper reinforcing member 52 is made lower than that of the lower reinforcing member 51 by gradually converging the upper closed section 96 of the upper reinforcing member 52 toward the pillar open section of the quarter pillar inner 45 to reduce the area. Set. Therefore, when the load F3 is input to the closed cross-section skeleton 50 due to the side collision of the vehicle, the upper reinforcing member 52 can be suitably deformed.
By appropriately deforming the upper reinforcing member 52, it is possible to deform the closed cross-section skeleton 50 so as to be appropriately crushed inward in the vehicle width direction. As a result, the rear end portion 12a of the side sill 12 can be suitably deformed inward in the vehicle width direction, and the side sill 12 can be uniformly deformed inward in the vehicle width direction.

In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with known constituent elements within the scope of the present invention, and it is also possible to appropriately combine the modified examples described above.
For example, in the above-described embodiment, an example in which the rear wheel house reinforcing member 18 is configured by two members of the upper reinforcing member 52 and the lower reinforcing member 51 will be described, but as another example, three or more rear wheel house reinforcing members are used. It is also possible to constitute with the member.
Further, although the bolt 72 and the nut 71 are exemplified as the fasteners in the above-described embodiment, other fasteners such as rivets can be used.
Further, a step portion extending in the vehicle width direction is formed on the upper surface of the rear end portion 23a of the side sill stiffener 23 (not shown), and the front end portion 51a of the lower reinforcing member 51 is superposed on the step portion from the inside. Collision performance can be improved.

10 Car Body Side Structure 12 Side Sill 14 Quarter Pillar 15 Roof Side Rail 16 Roof Arch 17 Side Outer Panel 17c Quarter Pillar Outer Part 18 Rear Wheel House Reinforcement Member 22 Side Sill Inner 22a Side Sill Inner Rear 23 Side Sill Stiffener 23a Side Sill Stiffener Rear End 24 Side sill closed section 32 Rear tire 34 Rear wheel house outer 34a Rear wheel house outer front end 34b Rear wheel house outer front upper part 35 Rear wheel house inner 35a Rear wheel house inner flange 35b Flange front end 42 Reinforcing member support (rear) (Front of the wheel house outer)
45 Quarter pillar inner 45a Upper end of quarter pillar inner 45c Pillar front leg (front leg)
45d Pillar rear leg (rear leg)
46 Roof Side Rail Inner 48 Rail Reinforcement Member 50 Closed-section Skeleton (Closed-section Skeleton)
51 Lower Reinforcing Member 51a Front End of Lower Reinforcing Member 51c Rear End (Upper End) of Lower Reinforcing Member
52 upper reinforcing member 53 lower top 54 lower leg (lower outer wall)
54a Front portion near the rear end of the stiffener outer wall 54b Front end portion of the lower outer wall 57 Bead 63 Rear door opening 65 Opening 67 Stacked portion 67a First welding surface 67b Second welding surface 68 Center of opening 71 Nut (Fastener)
72 bolts (fasteners)
78 Wheelhouse Closed Section 82 Front Bulkhead 83 Rear Bulkhead 85 Foaming Agent Placement Space 86 Foaming Agent Injection Port 91 Upper Top L1 Front Leg Length (Leg Length)
L2 rear leg length dimension (leg length dimension)
W1 Lower top width W2 Upper top width W3 Quarter pillar width

Claims

With rear wheel house outer;
A quarter pillar inner joined to the front upper part of the rear wheel house outer and formed in an open cross section of an outward opening having a hat-shaped cross section;
A roof side rail that is joined to the upper end of the quarter pillar inner and extends in the vehicle front-rear direction;
A rear wheel house reinforcing member that is superposed on a front portion of the outer rear wheel house to form a skeleton having a closed cross section;
The skeleton of the closed cross section defines a closed cross section,
The closed cross section gradually converges toward the open cross section of the quarter pillar inner to reduce the area of the closed cross section,
Body side structure.
The rear wheel house reinforcing member,
At least two members of an upper reinforcing member and a lower reinforcing member are provided,
The upper reinforcing member has lower strength than the lower reinforcing member,
The vehicle body side structure according to claim 1.
The quarter pillar inner is
Front legs,
The rear leg portion, which is disposed on the rear side of the vehicle body of the front leg portion and has a leg length dimension larger than that of the front leg portion,
The rear leg portion is coupled to a roof arch via a roof side rail inner of the roof side rail and a rail reinforcing member,
The vehicle body side portion structure according to claim 1 or 2.
The quarter pillar inner is
By forming the quarter pillar outer portion of the side outer panel forming the design surface on the vehicle width direction outer side from the vehicle width direction outer side, a closed cross section is formed together with the quarter pillar outer portion.
The vehicle body side part structure according to any one of claims 1 to 3.
The lower reinforcing member,
A lower leg portion that is projected in the direction of the rear tire and the rear door opening,
A lower top portion that is extended from the lower leg portion in the vehicle width direction and has a width dimension larger than the lower leg portion,
A bead extending in the vehicle width direction on the lower top,
The vehicle body side structure according to claim 2.
The upper reinforcing member is launched from the upper end of the lower reinforcing member,
The lower reinforcing member,
The width dimension of the lower top is formed to be substantially constant,
The upper reinforcing member is
Having an upper top portion connected to the lower top portion, the width dimension of the upper top portion is gradually reduced to match the width dimension of the quarter pillar inner.
The vehicle body side structure according to claim 5.
The front end of the lower reinforcing member is joined to the rear end of the side sill stiffener,
The lower leg portion is provided on an outer side of the lower top portion to form a lower outer wall,
The lower reinforcing member has an opening formed in a front portion of the lower outer wall near the rear end of the side sill stiffener,
At a position inside the vehicle width direction facing the opening, the rear portion of the side sill inner and the rear wheel house inner are overlapped in the vehicle width direction,
The portion where the rear part of the side sill inner and the rear wheel house inner are overlapped is a first welding surface that passes through the center of the opening and is orthogonal to the lower outer wall, and the outer side of the lower that passes through the center of the opening. A wall and an inclined second welding surface,
The vehicle body side part structure according to claim 5 or claim 6.
The lower reinforcing member,
A front end portion of the lower outer wall and a rear end portion of the side sill stiffener are fixed by a fastener.
The vehicle body side structure according to claim 7.
A side sill closed cross section is formed by overlapping the side sill stiffener and the side sill inner in the vehicle width direction,
The skeleton of the closed cross section is connected to the side sill closed cross section,
The vehicle body side part structure according to claim 7 or 8.
With the side outer panel and the rear wheel house outer, a wheel house closed cross-section including the skeleton of the closed cross-section is formed,
A front bulkhead and a rear bulkhead that are provided inside the wheel house closed section at intervals in the front-rear direction of the vehicle body to form a foaming agent placement space;
A foaming agent injection port facing the foaming agent arrangement space,
The vehicle body side structure according to claim 4.