JP7055221B2 - Body side structure - Google Patents

Description

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

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

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

Japanese Patent Application 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, in order to secure the rigidity of the joint portion (that is, the rigidity of the vehicle body). do. Therefore, the weight of the vehicle body increases, and there is room for improvement from this point of view.
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 the vehicle body and ensuring the rigidity of the vehicle body.

(1) The vehicle body side structure according to one aspect of the present invention is joined to the rear wheel house outer; the front upper part of the rear wheel house outer, and is formed into an open cross section of an outward opening having a hat-shaped cross section. With the quarter pillar inner; with the roof side rail that is joined to the upper end of the quarter pillar inner and extends in the front-rear direction of the vehicle body; The closed cross-section skeleton defines the 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 way, the rear wheel house reinforcing member was superposed on the front part of the rear wheel house outer to form a skeleton with a closed cross section. Thereby, for example, the vehicle body rigidity can be ensured against the load of the side collision.
In addition, 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 includes 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, when the upper reinforcing member and the lower reinforcing member have the same strength, it is difficult to crush the closed cross-section skeleton inward in the vehicle width direction when a load is input to the closed cross-section skeleton due to a side collision of the vehicle. The rear end of the side sill is connected to the front lower part of the rear wheel house outer and the lower end of the rear wheel house reinforcing member. Therefore, it is difficult to suitably 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 due to the load input due to the side collision.

Therefore, in the vehicle body side structure of (2) above, the strength of the upper reinforcing member is set lower than that of the lower reinforcing member.
Therefore, when a load is input to the skeleton having a closed cross section due to a side collision of the vehicle, the upper reinforcing member can be suitably deformed. By appropriately deforming the upper reinforcing member, the skeleton having a closed cross section can be deformed so as to be appropriately crushed inward in the vehicle width direction. As a result, the rear end portion of the side sill can be suitably deformed inward in the vehicle width direction, and the side sill can be deformed so as to be uniformly crushed 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 arranged behind the vehicle body of the front leg portion and having a leg length dimension larger than that of the front leg portion. The hind legs may be coupled to the roof arch via the roof side rail inners and rail reinforcing members of the roof side rails.

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

(4) In the vehicle body side structure, the quarter pillar inner portion is formed by superimposing the quarter pillar outer portion of the side outer panel forming the design surface on the outer side in the vehicle width direction from the outer side in the vehicle width direction. May form a closed cross section with.

By superimposing the quarter pillar inner and the quarter pillar outer portion in this way, the strength of the quarter pillar inner can be increased. As a result, the load input due to the side collision of the vehicle can be suitably transmitted to the roof arch via the quarter pillar inner.

(5) In the vehicle body side structure, the lower reinforcing member is provided with a lower leg portion protruding in the direction of the rear tire and the rear door opening and a lower leg portion protruding in the vehicle width direction from the lower leg portion. A lower top having a width larger than that of the legs and a bead extending in the vehicle width direction may be provided at the lower top.

In this way, the width dimension of the lower top is formed larger than that of the lower leg. Therefore, the height dimension of the lower leg extending in the direction between the rear tire and the rear door opening can be suppressed to a small size. This allows, for example, to increase the degree of freedom in design when determining the shape of the rear door opening. In addition, a bead was formed on the top of the lower. As a result, the lower top can be reinforced with beads, and the strength of the lower top can be ensured.

(6) In the vehicle body side structure, the upper reinforcing member is raised from the upper end portion of the lower reinforcing member, and the lower reinforcing member is formed so that the width dimension of the lower top portion is substantially constant, and the upper reinforcing member is reinforced. The member has an upper top connected to the lower top, and the width dimension of the upper top 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 and the vehicle interior space.

(7) In the vehicle body side structure, the front end portion of the lower reinforcing member is joined to the rear end portion of the side silstifuna, the lower leg portion is provided on the outer side of the lower top portion, and the lower outer wall is formed. The lower reinforcing member has an opening formed in the front portion of the lower outer wall near the rear end of the side sill stiffener, and the side sill inner is located 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. It may have a first welded surface to be welded and a second welded surface that passes through the center of the opening and is inclined to the lower outer wall.

In this way, an opening was formed in the front portion of the lower outer wall of the lower reinforcing member near the rear end of the side silstifuna. Further, the first welded surface and the second welded surface are provided at positions facing the opening. Therefore, the welding gun can be inserted through the opening to bring the first welding surface into contact with the second welding surface.
As a result, for example, in a state where the lower outer wall of the lower reinforcing member is arranged outside in the vehicle width direction of the side sill inner, the rear portion of the side sill inner and the rear wheel house inner are divided into two, a first welded surface and a second welded surface. It can be welded on the welded surface, and the strength of the car 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 fasteners.

In this way, the rear end portion of the lower outer wall of the lower reinforcing member and the rear end portion of the side silstifuna were fixed by 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 portion of the side silstifuna is firmly bonded (supported) in the skeleton having a closed cross section. As a result, a sufficient reaction force can be generated against the load due to the side collision of the vehicle.

(9) In the vehicle body side structure, even if 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, by making the skeleton of the closed cross section continuous with the closed cross section of the side sill, the closed cross section of the side sill can be reinforced by the skeleton of the closed cross section. As a result, the strength and rigidity of the rear part 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 incorporating the skeleton of the closed cross section, and the wheel house closed cross section is formed inside the wheel house closed cross section in the front-rear direction of the vehicle body. It may be provided with a front bulkhead and a rear bulkhead that are spaced apart to form a foaming agent placement space, and a foaming agent injection port facing the foaming agent placement space.

In this way, the front bulkhead and the rear bulkhead are provided on the skeleton having a closed cross section to form a foaming agent placement space. In addition, a foaming agent injection port facing the foaming agent placement space was formed. The foaming agent is injected into the foaming agent placement space from the foaming agent injection port and filled. As a result, the filled foaming agent can complement the strength and rigidity of the skeleton having a closed cross section, and can suppress the transmission of vibration from the rear tire or the like to the vehicle interior.

According to the aspect of the present invention, a rear wheel house reinforcing member is superposed on the front portion of the rear wheel house outer to form a skeleton having a closed cross section. In addition, 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 rigidity of the vehicle body can be ensured.

It is an exploded perspective view which shows the vehicle body side structure of the embodiment which concerns on this invention. It is an enlarged perspective view of the part II of FIG. It is sectional drawing which follows the line III-III of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is sectional drawing which follows the VV line of FIG. It is sectional drawing which follows the VI-VI line of FIG. It is sectional drawing which follows the line VII-VII of FIG. It is sectional drawing which follows the line VIII-VIII of FIG. It is sectional drawing which follows the IX-IX line of FIG. It is an enlarged perspective view of the rear wheel house reinforcing member of FIG. It is an exploded perspective view which shows the side sill and the lower reinforcing member of FIG. It is sectional drawing which follows the XII-XII line of FIG. It is an enlarged perspective view of the XIII part of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the arrow FR indicates the front of the vehicle, the arrow UP indicates the upper side of the vehicle, and the arrow LH indicates the left side of the vehicle.
FIG. 1 is an exploded perspective view showing a vehicle body side structure 10 according to an embodiment of the present invention. FIG. 2 is an enlarged perspective view of part II 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. It is provided with a house reinforcing member 18.
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 cross-sectional view taken along the line III-III of 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, for example, the side sill 12 is arranged on the left outer side in the vehicle width direction of the vehicle body and extends in the front-rear direction of the vehicle body. 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 by the side sill inner 22 and the 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 projects from the upper side of the stiffener outer wall 25 toward the inside in the vehicle width direction (that is, the side silina 22 side). The lower wall 27 of the stiffener projects from the lower side of the outer wall 25 of the stiffener toward the inside in the vehicle width direction (that is, the side silina 22 side). The stiffener upper flange 28 projects upward from the inner side of the stiffener upper wall 26. The stiffener lower flange 29 projects 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 overlapped from the outside in the vehicle width direction. As a result, the side sill 12 has a side sill stiffener 23 and a side sill inner 22 forming a side sill closed cross section 24 in a rectangular frame shape.
The rear wheel house 13 is connected to the rear end portion 12a of the side sill 12.

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. Note that FIG. 4 shows a state in which the rear wheel outer portion 17b is joined to the rear wheel house outer 34.
As shown in FIGS. 2 and 4, the rear wheel house 13 is formed so as to cover the upper part of 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 outer side of the rear tire 32. The front end 34a of the rear wheel house outer 34 is joined to the rear end 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 front portion 37 of the wheel house is inclined toward the rear upper part of the vehicle body from the rear end portion 12a of the side sill 12 to the front upper portion (upper extension portion) 13a of the rear wheel house 13 in a state of being arranged toward the vehicle width direction. It is extended. The wheel house inner flange 38 projects upward from the inner side of the wheel house front portion 37. The wheel house outer flange 39 projects downward from the outer side of the wheel house front portion 37.
The front portion 42 of the rear wheel house outer 34 is formed by the front portion 37 of the wheel house, the flange 38 inside the wheel house, and the flange 39 outside the wheel house. Hereinafter, the front portion 42 of the rear wheel house outer 34 is referred to as a “reinforcing member support portion 42”.
The rear wheel house reinforcing member 18 is supported by the reinforcing member supporting 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).
A closed cross section 78 is formed by the rear wheel house outer 34 and the rear wheel outer portion 17b by joining the rear wheel outer portion 17b to the rear wheel house outer 34 from the outside in the vehicle width direction. Hereinafter, this closed cross section 78 is referred to as "wheel house closed cross section 78".

FIG. 5 is a cross-sectional view taken along the line VV of FIG. Note that FIG. 5 shows a state in which the rear wheel outer portion 17b is joined to the rear wheel house outer 34.
As shown in FIGS. 2 and 5, the rear wheel house inner 35 is joined to the rear portion 22a of the side sill inner 22 by overlapping the front end portion 35b of the flange 35a from the inside in the vehicle width direction.
The joining between 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 the front upper portion (upper extension portion) 34b near the rear damper housing 41.

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

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 toward the front-rear direction of the vehicle body. The pillar front leg portion 45c is connected to the front side of the pillar bottom portion 45b. The pillar front leg portion 45c projects from the front side of the pillar bottom portion 45b toward the outside in the vehicle width direction in the front leg length dimension (leg length dimension) L1. The pillar hind legs 45d are connected to the inner side of the pillar bottom 45b.

The pillar rear leg portion 45d projects from the rear side of the pillar bottom portion 45b toward the outside in the vehicle width direction in the rear leg length dimension (leg length dimension) L2, and is arranged behind the vehicle body of the pillar front leg portion 45c. The pillar rear leg portion 45d has a rear leg length dimension L2 larger than the front leg length dimension L1 of the pillar front leg portion 45c. As a result, the leg length dimension L1 of the pillar front leg portion 45c can be suppressed to a small size, and the weight of the vehicle body can be reduced.
The pillar front flange 45e projects from the outer side of the pillar front leg portion 45c toward the front of the vehicle body. The pillar rear flange 45f projects toward the rear of the vehicle body from the outer side of the pillar rear leg portion 45d.
The quarter pillar inner 45 is formed by an open cross section having a hat-shaped cross section and an outward opening by the pillar bottom portion 45b, the pillar front leg portion 45c, the pillar rear leg portion 45d, the pillar front flange 45e, and the pillar rear flange 45f. 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. As a result, 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 that constitutes a part of the side outer panel 17 (see also FIG. 1). The upper end portion 45a of the quarter pillar inner 45 is joined to the roof side rail 15.

FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. Note that FIG. 7 shows a state in which the roof side rail outer portion 17d is joined to the roof side rail outer portion 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 front-rear direction of the vehicle body. 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. Since the roof side rail outer 47 is joined to the roof side rail inner 46 from the outside in the vehicle width direction, 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. Inside the closed cross section, a rail reinforcing member 48 is joined to the roof side rail inner 46. The roof side rail outer 47 is covered from the outside in the vehicle width direction by the roof side rail outer portion 17d of the side outer panel 17.

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 bridged to 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 portion 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 45d of the quarter pillar inner 45 is connected to the roof arch 16 via the roof side rail inner 46 of the roof side rail 15 and the rail reinforcing member 48.

As a result, the load input due to 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.
Further, the quarter pillar inner 45 is reinforced by the quarter pillar outer portion 17c, and the strength of the quarter pillar inner 45 is enhanced. As a result, the load F1 input due to 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 cross-sectional view taken along the line VIII-VIII of FIG. FIG. 9 is a cross-sectional view taken along the line IX-IX of FIG. Note that FIG. 9 shows a state in which the rear wheel outer portion 17b is joined to the rear wheel house outer 34.
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 from diagonally above. As a result, the skeleton 50 having a closed cross section (see also FIG. 12) is formed by the reinforcing member support portion 42 of the rear wheel house outer 34 and the rear wheel house reinforcing member 18. Hereinafter, the closed-section skeleton 50 is referred to as a “closed-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 cross-sectional view taken along the line XII-XII of FIG.
As shown in FIGS. 10, 11, and 12, the lower reinforcing member 51 has a front end portion 51a joined to the rear end portion 12a of the side sill 12, and is rear of the vehicle body along the reinforcing member support portion 42 of the rear wheel house outer 34. It extends upward in an inclined manner. The lower reinforcing member 51 has 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 top portion 53 is arranged at an interval on the front upper side of the vehicle body with respect to the front portion 37 of the wheel house, and is formed substantially to have a width dimension W1 in the vehicle width direction. The lower top portion 53 extends along the front portion 37 of the wheel house in an inclined manner from the front end portion 34a of the rear wheel house outer 34 to the front upper portion 34b toward the rear upper part of the vehicle body. In other words, the lower reinforcing member 51 projects inward in the vehicle width direction from the lower leg portion 54.

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 rises upward with respect to the lower top 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 projects 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 front portion 37 of the wheel house so that the height dimension becomes H1 in the direction connecting the center of the rear tire 32 and the rear door opening 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 a “lower outer wall 54”.
The direction of the rear tire 32 and the rear door opening 63 means a direction that intersects the front portion 37 of the wheel house and the top portion 53 of the lower.

The lower outer flange 55 projects from the lower side of the lower leg portion 54 toward the outside in the vehicle width direction along the front portion 37 of the wheel house. The lower outer flange 55 is joined to the front portion 37 of the wheel house.
From the inner side of the lower top 53, the lower inner flange 56 projects upward along the wheel house inner flange 38. The lower inner flange 56 is joined to the wheel house inner flange 38. In this way, the lower outer flange 55 is joined to the front portion 37 of the wheel house, and the lower inner flange 56 is joined to the inner flange 38 of the wheel house, so that the lower reinforcing member 51 is joined to the reinforcing member support portion of the rear wheel house outer 34. It is joined along 42. In this state, the lower reinforcing member 51 has a front end portion 51a 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 at the other portion 51b of the front end portion 51a. Therefore, the height dimension H1 of the lower leg 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 at the lower top portion 53. As a result, the lower top 53 can be reinforced by the plurality of beads 57 against the load F2 input due to the side collision of the vehicle, and the strength of the lower top 53 can be ensured.

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 is not necessary, but only the nut 71 and the bolt 72, which will be described later, may be used for joining. 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 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 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. Is located in. Hereinafter, the overlapped portion 67 is abbreviated as "overlapping portion 67".
The overlapping portion 67 has a first welded surface 67a and a second welded surface 67b. The first welded surface 67a is a surface that passes through the center 68 of the opening 65 and is orthogonal to the lower outer wall 54.
The second welded 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 so that the overlapping portion 67 has a first welding surface 67a and a 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 65 through the center 68 in the direction of the arrow B 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 welded surfaces of the first welded surface 67a and the second welded surface 67b of the overlapping portion 67 can be welded. The strength of the car body can be increased.

As shown in FIGS. 3 and 11, in the lower reinforcing member 51, the nut 71 is welded from the inside in the vehicle width direction 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. Has been done. The front portion 54a of the lower outer wall 54 is overlapped with 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, by screwing the bolt 72 to the nut 71 from the outside in the vehicle width direction, 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 by 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 bolts 72 and nuts 71.

The closed cross-section skeleton 50 is formed by the lower reinforcing member 51 and the reinforcing member support portion 42. Therefore, the rear end portion 23a of the side sill stiffener 23 is firmly connected (supported) in 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.
Further, the side sill 12 is formed by the side sill stiffener 23 and the 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". The closed cross-section skeleton 50 is continuous with the closed cross-section 24 of the side sill.
By connecting the closed cross-section skeleton 50 to the side sill closed cross section 24 in this way, 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, a wheel house closed cross 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. A 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 front portion 37 of the wheel house at intervals in the front-rear direction of the vehicle body.

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 cross section 78 is partitioned by the front bulkhead 82 and the rear bulkhead 83. As a result, a foaming agent placement space 85 is formed between the front bulkhead 82 and the rear bulkhead 83 inside the wheel house closed cross section 78.

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

As shown in FIGS. 9, 8 and 10, the upper reinforcing member 52 is raised from the rear end portion (upper end portion) 51c 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.
In the upper top portion 91, the front end portion 91a is connected to the rear end portion 53c of the lower top portion 53. The width dimension W2 in the vehicle width direction of the upper top portion 91 is gradually reduced from the front end portion 91a to the rear end portion 91b, and coincides with the width dimension W3 in the vehicle width direction of the quarter pillar 14.

The upper leg portion 92 projects from the outer side of the upper top portion 91 toward the rear side of the vehicle body. The upper outer flange 94 projects from the outer side of the upper leg portion 92 toward the outside in the vehicle width direction. The upper outer flange 94 has an outer side portion 94a joined to the front upper portion 34b of the rear wheel house outer 34 and the quarter pillar inner 45.
The upper inner flange 93 projects from the inner side of the upper top portion 91 toward the rear side of the vehicle body. The upper inner flange 93 has an outer side portion 93a joined to the front upper portion 34b 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 pillar open cross section (see also FIG. 6) of the quarter pillar inner 45. .. A closed cross section 96 is formed by the upper reinforcing member 52 and the front upper portion 34b of the rear wheel house outer 34. Hereinafter, the closed cross section 96 is 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 to the rear end portion 91b, and is set 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 and reduce the area of the upper closed cross section 96.

The upper reinforcing member 52 is connected to the lower reinforcing member 51. The upper closed cross section 96 forms the upper part of the closed cross 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 portion 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. As a result, for example, the rigidity of the vehicle body is ensured against the load F2 of the side collision.
Further, the upper part of the closed cross-section skeleton 50 (that is, the upper closed cross-section 96) was formed so as to gradually converge toward the quarter pillar inner 45 to reduce the area of the upper part of the closed-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.
Furthermore, by gradually converging the upper part of the closed cross-section skeleton 50 (upper closed cross-section 96) toward the quarter pillar inner 45 and gradually reducing the area, the rear wheel does not affect 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. On the other hand, the lower reinforcing member 51 has a constant closed cross-sectional area. 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 strength of the upper part of the closed cross-section skeleton 50 (upper closed cross-section 96) is set lower than that of 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 a side collision of the vehicle, the closed cross-section skeleton 50 is preferably inside in 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 suitably 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 due to 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 cross section 96 of the upper reinforcing member 52 toward the pillar open cross section of the quarter pillar inner 45 to reduce the area. I set it. Therefore, when the load F3 is input to the closed cross-section skeleton 50 due to a side collision of the vehicle, the upper reinforcing member 52 can be suitably deformed.
By appropriately deforming the upper reinforcing member 52, the closed cross-section skeleton 50 can be deformed 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 deformed so as to be uniformly crushed inward in the vehicle width direction.

In addition, it is appropriately possible to replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-mentioned modifications may be appropriately combined.
For example, in the above embodiment, an example in which the rear wheel house reinforcing member 18 is composed of two members, an upper reinforcing member 52 and a lower reinforcing member 51, will be described, but as another example, three or more rear wheel house reinforcing members are described. It is also possible to configure it with the members of.
Further, in the above embodiment, the bolt 72 and the nut 71 are exemplified as the fasteners, but other fasteners such as rivets can also 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 overlapped with the step portion from the inside. The bumping performance can be improved.

10 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 22 Side sill inner 22a Side sill inner rear 23 Side sill stiffener 23a Side sill stiffer rear end 24 Side sill closed cross section 32 Rear tire 34 Rear wheel house outer 34a Rear wheel house outer front end 34b Rear wheel house outer front upper 35 Rear wheel house inner 35a Rear wheel house inner flange 35b Flange front end 42 Reinforcing member support (rear) Front of Wheelhouse Outer)
45 Quarter Pillar Inner 45a Top of Quarter Pillar Inner 45c Pillar Front Leg (Front Leg)
45d pillar hind legs (rear legs)
46 Roof side rail Inner 48 Rail reinforcement member 50 Closed cross-section skeleton (closed cross-section skeleton)
51 Lower reinforcing member 51a Front end of lower reinforcing member 51c Rear end of lower reinforcing member (upper end)
52 Upper reinforcing member 53 Lower top 54 Lower leg (lower outer wall)
54a Front end near the rear end of the outer wall of the stiffener 54b Front end of the lower outer wall 57 Bead 63 Rear door opening 65 Opening 67 Overlapping site 67a First weld surface 67b Second weld surface 68 Center of opening 71 Nut (Fastener)
72 bolts (fasteners)
78 Wheelhouse closed cross section 82 Front bulkhead 83 Rear bulkhead 85 Foaming agent placement space 86 Foaming agent injection port 91 Upper top L1 Front leg length dimension (leg length dimension)
L2 hind leg length dimension (leg length dimension)
W1 Lower top width dimension W2 Upper top width dimension W3 Quarter pillar width dimension

Claims (10)

With the rear wheel house outer;
With 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;
With a roof side rail that is joined to the upper end of the quarter pillar inner and extends in the front-rear direction of the vehicle body;
With a rear wheel house reinforcement that is superimposed on the front of the rear wheel house outer to form a closed cross-section skeleton;
The closed cross section skeleton defines the closed cross section.
The closed cross section gradually converges toward the open cross section of the quarter pillar inner, and the area of the closed cross section decreases.
The rear wheel house reinforcing member is
At least two members, an upper reinforcing member and a lower reinforcing member, are provided.
The lower reinforcing member is
The lower legs overhanging in the direction of the rear tires and the rear door opening,
The lower top, which protrudes from the lower leg in the vehicle width direction and has a larger width than the lower leg,
A bead extending in the vehicle width direction is provided at the top of the lower portion.
Body side structure. The upper reinforcing member has a lower strength than the lower reinforcing member.
The vehicle body side structure according to claim 1. The quarter pillar inner is
With the front legs
It has a rear leg portion that is arranged behind the vehicle body of the front leg portion and has a leg length dimension larger than that of the front leg portion.
The hind legs are coupled to the roof arch via the roof side rail inners and rail reinforcements of the roof side rails.
The vehicle body side structure according to claim 1 or 2. The quarter pillar inner is
By superimposing the quarter pillar outer portion of the side outer panel forming the design surface on the outer side in the vehicle width direction from the outer side in the vehicle width direction, a closed cross section is formed together with the quarter pillar outer portion.
The vehicle body side structure according to any one of claims 1 to 3. (Delete) The upper reinforcing member is raised from the upper end portion of the lower reinforcing member, and the upper reinforcing member is raised.
The lower reinforcing member is
The width dimension of the lower top is formed to be substantially constant,
The upper reinforcing member is
It has an upper top connected to the lower top, and the width dimension of the upper top is gradually reduced to match the width dimension of the quarter pillar inner.
The vehicle body side structure according to claim 1. The front end portion of the lower reinforcing member is joined to the rear end portion of the side sill stiffener.
The lower leg is provided on the outer side of the lower top 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 silstifuna.
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 portion of the side sill inner and the rear wheel house inner are overlapped is a first welded surface that passes through the center of the opening and is orthogonal to the lower outer wall, and passes through the center of the opening and is outside the lower. With a wall and a second welded surface that slopes,
The vehicle body side structure according to claim 1 or 6. The lower reinforcing member is
The front end of the lower outer wall and the rear end of the side silstifuna are fixed by fasteners.
The vehicle body side structure according to claim 7. The side sill stiffener and the side sill inner are overlapped in the vehicle width direction to form a side sill closed cross section.
The skeleton of the closed cross section is connected to the closed cross section of the side sill.
The vehicle body side structure according to claim 7 or 8. The side outer panel and the rear wheel house outer form a wheel house closed cross section incorporating the skeleton of the closed cross section.
The front bulkhead and the rear bulkhead, which are provided inside the closed cross section of the wheel house at intervals in the front-rear direction of the vehicle body and form a foaming agent placement space,
A foaming agent injection port facing the foaming agent placement space is provided.
The vehicle body side structure according to claim 4.

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