JP2018162036A - Rear vehicle body structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively disperse a load input to a suspension housing from a suspension member in a vehicle body rear part.SOLUTION: A suspension housing 50 connecting a side frame 6 to a wheel house 24 is provided with: a support part 52 supporting a suspension member 41; a brace part 77 connected to a cross member 5 at the vehicle body front side relative to the support part 52; and a first load transmission part 85 which continues in a vehicle body vertical direction and is formed into an open cross section shape or a closed cross section shape at the vehicle body rear side relative to the support part 52. The wheel house 24 is provided with a second load transmission part 27 which continues in the vehicle body vertical direction, is formed into an open cross section or a closed cross section, and connects the first load transmission part 85 to a lower end part of a load transmission member 34.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rear body structure of a vehicle including a suspension housing, and belongs to the field of vehicle body production technology.

  A suspension housing that supports a suspension damper may be provided across the side frame extending in the longitudinal direction of the vehicle body and the wheel house that houses the rear wheel at the rear of the vehicle body.

  In general, the damper is inclined inward in the vehicle body width direction toward the upper side of the vehicle body. Therefore, an inward component in the vehicle body width direction is included in the load input from the damper to the suspension housing when the rear wheel is bumped. included. When such a load is concentrated locally on the suspension housing, the suspension housing is likely to be deformed such that the damper support portion falls to the vehicle interior side (hereinafter referred to as “inwardly-turning deformation”).

  On the other hand, around the wheel house, for example, as disclosed in Patent Document 1, a load is transmitted from the upper end of the wheel house to a pillar member or a roof member above the vehicle body, or from the wheel house to the vehicle body lower side. There may be provided various load transmitting members for transmitting a load to the cross member or the side frame.

  In this case, if the load input from the suspension to the suspension housing is effectively transmitted to the load transmission member around the wheel house as described above, the load is distributed to each part of the rear part of the vehicle body. It is possible to suppress collapse deformation.

JP 2009-083826 A

  However, if the suspension housing and the load transmission member around the wheel house described above are not connected, effective load transmission may not be performed between them, and in this case, the load is concentrated on the suspension housing. This makes it difficult to effectively suppress the above-described inward deformation.

  Therefore, an object of the present invention is to effectively disperse a load input from the suspension member to the suspension housing at the rear portion of the vehicle body.

  In order to solve the above-mentioned problems, a vehicle rear body structure according to the present invention is configured as follows.

The invention according to claim 1 of the present application is
A wheel house provided on the side of the rear of the vehicle body,
A side frame extending in the longitudinal direction of the vehicle body in the vehicle body width direction of the wheel house;
A cross member extending in the vehicle body width direction and connected to the side frame at an end in the length direction;
A load transmitting member extending from the wheel house to the vehicle body upper side;
A suspension member disposed outside the side frame in the vehicle body width direction;
A support portion that supports the suspension member; and a brace portion that extends in the vertical direction of the vehicle body on the front side of the vehicle body relative to the support portion and is connected to the cross member at a lower end portion, and the side frame and the wheel A vehicle rear body structure comprising a suspension housing connecting the house,
A first load transmitting portion formed in an open cross-sectional shape or a closed cross-sectional shape continuously in the vertical direction of the vehicle body on the vehicle rear side portion of the suspension housing relative to the support portion;
The wheel house includes a second load transmitting portion that is formed in an open cross-sectional shape or a closed cross-sectional shape continuously in the vertical direction of the vehicle body and connects the first load transmitting portion and a lower end portion of the load transmitting member. It is characterized by that.

  Here, the “first load transmission portion” may be constituted by a component member of the suspension housing, or may be constituted by a component member of the suspension housing and a member attached thereto. In addition, the “second load transmitting portion” referred to here may be configured by a component member of the wheel house, may be configured by a member attached to the wheel house, or may be configured by both of these members. Good.

  In addition, the “open cross-section” portion in the present specification means a cross-sectional portion having an internal space that is open in a direction orthogonal to the length direction. In addition, the term “formed in an open cross-section or closed cross-section” as used in the present specification is formed in an “open cross-section” over the entire length, and formed in a “closed cross-section” over the entire length. In addition to the above, it is also included that “open cross-section” is formed in a part of the length direction and “closed cross-section” is formed in the remaining part of the length direction.

The invention according to claim 2 is the invention according to claim 1,
The suspension housing includes a connecting portion that continues to the vehicle body rear side of the support portion,
The first load transmitting portion is provided so as to extend from the connecting portion to the vehicle body upper side.

The invention according to claim 3 is the invention according to claim 2,
The suspension housing includes a rib that connects an edge portion of the first load transmission portion on the vehicle body front side and the connecting portion.

The invention according to claim 4 is the invention according to claim 2 or 3, wherein
The suspension housing includes a rib that connects an edge of the first load transmitting portion on the vehicle body rear side and the connecting portion.

The invention according to claim 5 is the invention according to any one of claims 2 to 4,
The suspension housing is provided with a lower extension portion that is provided so as to extend from the connecting portion to the vehicle body lower side and that is continuously formed in an open section shape or a closed section shape in the vehicle body vertical direction. .

The invention according to claim 6 is the invention according to any one of claims 1 to 5,
The first load transmitting portion has a cross-sectional shape along a surface on the vehicle interior side at a lower end portion of the second load transmitting portion.

The invention according to claim 7 is the invention according to any one of claims 1 to 6,
The suspension housing is joined to the wheel house at a portion adjacent to the first load transmitting portion in the longitudinal direction of the vehicle body.

  According to the first aspect of the present invention, the load input from the suspension member to the support portion of the suspension housing when the rear wheel is bumped passes through the brace portion of the suspension housing on the front side of the vehicle body from the support portion. The first load transmitting portion of the suspension housing, the second load transmitting portion of the wheel house connected to the upper side of the vehicle body, and the upper side of the vehicle body on the vehicle rear side of the support portion. It can be transmitted to the upper part of the vehicle body made of a pillar member, a roof member or the like via the connected load transmitting member. For this reason, the load in the direction in which the support portion of the suspension housing is tilted toward the vehicle interior side is effectively distributed to each portion of the rear portion of the vehicle body, so that the inclining deformation of the suspension housing can be effectively suppressed.

  According to the second aspect of the present invention, the load input from the suspension member to the support portion can be effectively transmitted to the first load transmission portion via the connecting portion connected to the rear side of the vehicle body. .

  According to the third aspect of the present invention, it is possible to suppress the cross-sectional deformation of the first load transmitting portion while improving the surface rigidity of the connecting portion, whereby the connecting portion and the first load transmitting portion are supported from the support portion. Load transmission to the second load transmission section via the section can be effectively performed. In addition, it is possible to suppress deformation such that the first load transmission portion falls to the inner side in the vehicle body width direction with respect to the communication portion, and thereby, the connection state of the first load transmission portion to the second load transmission portion is easily maintained. The load transmission from the first load transmission unit to the second load transmission unit can be effectively performed.

  According to the invention of claim 4, the surface rigidity of the connecting portion is improved, the cross-sectional deformation of the first load transmitting portion is suppressed, and the first load transmitting portion is tilted inward in the vehicle body width direction with respect to the connecting portion. Can be more effectively realized.

  According to the fifth aspect of the present invention, the connecting portion and the first load transmitting portion are supported from the lower side of the vehicle body by the lower extension portion, so that the deformation of the connecting portion and the displacement of the first load transmitting portion are effective. Thus, load transmission from the support portion to the second load transmission portion via the communication portion and the first load transmission portion can be effectively realized.

  According to the sixth aspect of the present invention, the first load transmission portion is disposed along the surface on the vehicle interior side at the lower end portion of the second load transmission portion, so that the second load transmission from the first load transmission portion. The load can be effectively transmitted to the part.

  According to the seventh aspect of the present invention, the suspension housing is joined to the wheel house at a portion adjacent to the first load transmission portion, so that the first load transmission portion with respect to the lower end portion of the second load transmission portion. Relative displacement can be effectively suppressed. Therefore, it becomes easy to maintain the state where the first load transmission unit is disposed along the surface on the vehicle interior side at the lower end of the second load transmission unit, so that the first load transmission unit to the second load transmission unit can be maintained. The load transmission efficiency can be improved.

The perspective view which looked at the rear part body structure of the vehicle concerning one embodiment of the present invention from the vehicle interior side. The side view which looked at the same rear body structure from the vehicle compartment outside. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 when the rear vehicle body structure is viewed from the front side of the vehicle body. The perspective view which looked at the suspension housing from diagonally upward on the vehicle interior side. The perspective view which looked at the suspension housing from the diagonally lower side outside the passenger compartment. The side view which looked at the suspension housing from the vehicle compartment outer side. FIG. 7 is a cross-sectional view taken along line B-B in FIG. The bottom view which looked at a part of suspension housing from the vehicle body lower side. FIG. 7 is a cross-sectional view taken along line CC, line DD, and line EE of FIG. 6 when the suspension housing is viewed from the front side of the vehicle body. FIG. 7 is a cross-sectional view taken along line FF in FIG. 6 when the suspension housing is viewed from the rear side of the vehicle body. The perspective view which looked at the junction part of a suspension housing and a wheel house inner, and its peripheral part from diagonally downward of the vehicle interior side. The perspective view which looked at the connection part of a suspension housing and a side frame, and its peripheral part from the diagonally forward outer side of a vehicle interior. The top view which looked at the suspension housing and its peripheral part from the vehicle body upper side. The perspective view which looked at the rear side load transmission part of the suspension housing, and its peripheral part from the diagonally back of the vehicle interior side. GG sectional drawing of FIG. 1 which looked at the same rear side load transmission part and its peripheral part from the vehicle body upper side. The HH sectional view taken on the line HH of FIG.

  Hereinafter, a vehicle rear body structure according to an embodiment of the present invention will be described with reference to the accompanying drawings. In each of the attached drawings, the vehicle body structure on one side (the vehicle body right side) in the vehicle body width direction is illustrated, but the other side (the vehicle body left side) is configured in the same manner. Further, in each drawing of the accompanying drawings, the directions described in front / rear, inside / outside, and up / down indicate the vehicle body longitudinal direction, the vehicle body width direction, and the vehicle body vertical direction, respectively.

[overall structure]
As shown in FIGS. 1 and 2, an automobile 1 having a rear body structure of a vehicle according to this embodiment includes a floor panel 2 constituting a floor portion of a vehicle interior space, and an outer edge of the floor panel 2 in the vehicle body width direction. A side frame 6 extending in the vehicle body longitudinal direction along the vehicle body, a roof side rail 10 extending in the vehicle body longitudinal direction along the vehicle body width direction outer edge of the roof panel (not shown), and from the roof side rail 10 to the vehicle body lower side. A plurality of pillar portions 12 and 14 extending are provided.

  The side frame 6, the roof side rail 10, and the pillar portions 12 and 14 are provided as a pair on the left and right sides, but only the right side of the vehicle body is shown in the drawings.

  The floor panel 2 is provided with an inclined portion 3 so as to form a step that makes the floor surface of the vehicle rear side portion higher than the floor surface of the vehicle body front side portion. Thereby, compared with the floor surface of a passenger | crew's room space, the floor surface of the luggage compartment space of the vehicle body back side is arrange | positioned highly. The floor panel 2 is provided with a tire pan 4 that bulges to the lower side of the vehicle body at a rear side portion of the vehicle body relative to the inclined portion 3, that is, a portion constituting the floor portion of the cargo space.

  The side frame 6 is provided with a kick-up portion 7 that is inclined to the vehicle body upper side toward the vehicle rear side in accordance with the inclined portion 3 of the floor panel 2. Between the left and right side frames 6, a cross member 5 extending in the vehicle body width direction is installed. The end of the cross member 5 in the vehicle width direction is connected to the rear end of the kick-up portion 7 in the side frame 6.

  The cross member 5 is disposed along the floor panel 2, and a closed cross section that is continuous in the vehicle body width direction is formed between the cross member 5 and the floor panel 2. Thereby, load transmission between the left and right side frames 6 can be effectively performed via the cross member 5.

  As shown in the cross-sectional view of FIG. 3, the side frame 6 includes an upper frame member 8 and a lower frame member 9 that are joined to each other. The upper frame member 8 and the lower frame member 9 are formed by press-molding a metal plate such as a steel plate, for example.

  The upper frame member 8 includes an upper wall portion 8a constituting the upper surface of the side frame 6, an inner wall portion 8b extending from the inner edge of the upper wall portion 8a in the vehicle width direction to the vehicle body lower side, and a lower edge portion of the inner wall portion 8b. A flange portion 8c extending inward in the vehicle body width direction and an outer wall portion 8d extending from the outer edge portion in the vehicle body width direction of the upper wall portion 8a to the vehicle body upper side are provided.

  The lower frame member 9 is opposed to the vehicle body lower side of the upper wall portion 8a of the upper frame member 8 and constitutes the lower wall portion 9a constituting the lower surface of the side frame 6, and the vehicle body width direction inner edge of the lower wall portion 9a An inner wall portion 9b extending upward, a flange portion 9c extending inward in the vehicle width direction from the upper edge portion of the inner wall portion 9b, and an outer wall portion extending from the inner edge in the vehicle width direction of the lower wall portion 9a to the vehicle body upper side. 9d.

  The flange portion 9c of the lower frame member 9 is overlapped with the lower surface of the flange portion 8c of the upper frame member 8 with the floor panel 2 interposed therebetween. The flange portion 8c of the upper frame member 8, the floor panel 2, and the flange portion 9c of the lower frame member 9 are joined to each other by welding, for example, in a three-layered state.

  The outer wall portion 9d of the lower frame member 9 is disposed so as to face the outer side in the vehicle width direction with respect to the outer wall portion 8d and the inner wall portion 8b of the upper frame member 8 and the inner wall portion 9b of the lower frame member 9. ing. The upper edge portion of the outer side wall portion 9d is overlapped with the outer surface of the outer wall portion 8d of the upper frame member 8 in the vehicle width direction, and is joined to the outer wall portion 8d by, for example, welding.

  In the side frame 6 configured as described above, a closed cross section that is continuous in the longitudinal direction of the vehicle body is formed between the upper frame member 8 and the lower frame member 9.

  As the plurality of pillar portions, an A pillar (front pillar) and a B pillar (center pillar) (not shown), and a C pillar (quarter pillar) 12 and a D pillar (rear pillar) 14 shown in FIGS. They are arranged in this order from the front side of the vehicle body. As shown in FIGS. 1 and 2, a quarter window 16 is provided between the C pillar 12 and the D pillar 14, and a rear seat for getting on and off between the C pillar 12 and the B pillar (not shown). A rear door opening 18 is provided.

  The automobile 1 includes a side panel 20 constituting a side surface portion of the vehicle body at a portion adjacent to the rear side of the rear door opening 18 and a wheel house 24 for a rear wheel provided along a lower edge of the side panel 20. It has. The front lower end portions of the side panel 20 and the wheel house 24 are connected to the rear end portion of a side sill 30 (see FIG. 1) extending in the longitudinal direction of the vehicle body.

  The side panel 20 includes an upper panel 21 and a lower panel 22 that are arranged continuously in the vehicle body vertical direction. The lower end portion of the upper panel 21 and the upper end portion of the lower panel 22 are joined to each other by welding, for example.

  The wheel house 24 includes a wheel house outer 25 (see FIG. 2) that bulges outward from the side panel 20 in the vehicle width direction, and a wheel house inner 26 (see FIG. 1) that bulges from the side panel 20 in the vehicle width direction. It has.

  The wheel house outer 25 and the wheel house inner 26 are formed by press-molding a metal plate such as a steel plate, for example. As shown in FIG. 3, the wheel house outer 25 is provided integrally with the lower panel 22 of the side panel 20, for example. The wheel house inner 26 is joined to the surface on the vehicle interior side of the lower panel 22 by, for example, welding.

  As shown in FIG. 2, the C pillar 12 includes an outer pillar member 32 that extends in the vertical direction of the vehicle body. The outer pillar member 32 is a member having, for example, a cross-sectional hat shape opened to the inner side in the vehicle body width direction. The outer pillar member 32 is disposed such that the open portion thereof is closed by the side panel 20 (see FIG. 1), and is joined to the surface of the side panel 20 on the outer side of the passenger compartment, for example, by welding. Thereby, in the C pillar 12, a closed cross section that is continuous in the vertical direction of the vehicle body is formed between the outer pillar member 32 and the side panel 20.

  The upper end portion of the outer pillar member 32 is joined to the roof side rail 10 by, for example, welding, and the lower end portion of the outer pillar member 32 is joined to the upper surface portion of the wheel house outer 25 by, for example, welding. Thereby, C pillar 12 has connected wheel house 24 and roof side rail 10, and bears the load transmission function between these.

  Further, an outer reinforcing member 34 extending in the vertical direction of the vehicle body on the rear side of the vehicle body from the C pillar 12 is joined to the surface of the side panel 20 outside the passenger compartment, for example, by welding. The outer reinforcing member 34 is a hat-shaped member that opens to the inner side in the vehicle width direction, and forms a closed cross section that is continuous with the side panel 20 in the vertical direction of the vehicle body.

  The outer reinforcing member 34 is joined to the upper surface portion of the wheel house outer 25 at the lower end portion, for example, by welding, and joined to the D pillar 14 at the upper end portion, for example, by welding. The outer reinforcing member 34 that connects the wheel house outer 25 and the D pillar 14 in this manner is a load transmission member that performs a load transmission function between the wheel house 24 and the D pillar 14.

[Wheel House Inner]
As shown in FIGS. 1 and 3, the wheel house inner 26 has a substantially semicircular vertical wall portion 26 a that is disposed adjacent to the outer side in the vehicle width direction of the side frame 6, and the vertical wall portion 26 a. A peripheral wall portion 26b extending from the peripheral edge portion of the peripheral wall portion toward the outer side in the vehicle body width direction, and a flange portion 26c extending from the peripheral edge portion of the peripheral wall portion 26b to the outer side in the vehicle body width direction. The flange portion 26c is joined to the lower panel 22 by welding, for example.

  A recessed portion 26d that is recessed outward in the vehicle body width direction is formed in a groove shape extending in the vehicle body vertical direction at the vehicle body longitudinal direction central portion of the vertical wall portion 26a of the wheel house inner 26. A notch 26e (see FIGS. 11 and 12) is provided at the lower edge of the vertical wall portion 26a. 11 and 12, the illustration of the suspension 40 is omitted.

  A suspension housing 50 is joined to the wheel house inner 26 so as to close the notch 26e from the inner side in the vehicle width direction. The configuration of the suspension housing 50 will be described later.

  As shown in FIGS. 1 and 14, the wheel house inner 26 is provided with a load transmission portion 27 that extends toward the vehicle body upper side and the vehicle body width direction outer side. The load transmitting portion 27 is provided integrally with the wheel house inner 26 so as to bulge from the vertical wall portion 26a and the peripheral wall portion 26b to the vehicle interior side.

  The load transmitting portion 27 is disposed on the vehicle body rear side with respect to the hollow portion 26d of the vertical wall portion 26a. The load transmitting portion 27 extends along the vertical wall portion 26a from the middle portion of the vertical wall portion 26a in the vertical direction of the vehicle body toward the upper side of the vehicle body to the corner portion between the vertical wall portion 26a and the peripheral wall portion 26b. It extends along the peripheral wall portion 26b from the corner portion toward the outer side in the vehicle body width direction to the flange portion 26c. The width of the load transmitting portion 27 in the longitudinal direction of the vehicle body is gradually increased toward the upper end side.

  As shown in the cross-sectional view of FIG. 15, the load transmitting portion 27 has, for example, a cross-sectional hat shape that opens toward the outside of the passenger compartment. The load transmitting portion 27 has a similar cross-sectional shape over substantially the entire length in the length direction. That is, the load transmission part 27 is formed in an open cross-sectional shape continuously in the vehicle body up-down direction.

  The load transmission unit 27 includes a front surface portion 27a, a side surface portion 27b, and a rear surface portion 27c. The front surface portion 27a is provided so as to extend outward from the front edge portion of the side surface portion 27b, and the rear surface portion 27c is extended outward from the rear edge portion of the side surface portion 27b.

  The front surface portion 27a is disposed to be inclined toward the vehicle body front side toward the vehicle body width direction outer side, and the rear surface portion 27c is disposed to be inclined toward the vehicle body rear side toward the vehicle body width direction outer side. An obtuse corner portion is formed between the side surface portion 27b and the front surface portion 27a and between the side surface portion 27b and the rear surface portion 27c. Thereby, the cross-sectional shape of the load transmission part 27 becomes a shape which expanded toward the vehicle body width direction outer side.

  As shown in FIG. 1, the upper end portion of the load transmitting portion 27 is disposed opposite to the lower end portion of the outer reinforcing member 34 with the side panel 20 interposed therebetween. Thereby, the load transmission part 27 and the outer side reinforcement member 34 are mutually connected via the side panel 20, and the effective load transmission from the wheel house inner 26 to the outer side reinforcement member 34 is attained. .

[Side brace]
A side brace 36 for connecting the cross member 5 and the C pillar 12 to the front side of the vehicle body from the hollow portion 26d of the wheel house inner 26 is disposed. The side brace 36 extends from the end of the cross member 5 to the lower end of the C pillar 12 so as to extend outward in the vehicle body width direction and upward of the vehicle body along the surface of the wheel house inner 26 on the vehicle interior side.

  The side brace 36 includes an upper brace member 38 joined to the wheel house inner 26 by welding, for example, and a brace portion 77 provided integrally with a suspension housing 50 described later and connected to a lower end portion of the upper brace member 38. ing.

  The upper brace member 38 is a long member having a hat-shaped cross section that opens to the outside of the passenger compartment. The upper brace member 38 is a high-rigidity member made of a steel plate that is thicker than the wheel house inner 26, for example. The lower end portion of the upper brace member 38 is joined to the brace portion 77 by, for example, SPR (self-piercing rivet), and the upper end portion of the upper brace member 38 is joined to the lower panel 22 of the side panel 20 by, for example, welding.

  The upper end portion of the upper brace member 38 is disposed opposite to the lower end portion of the outer pillar member 32 with the side panel 20 interposed therebetween. Thereby, the load transmission between the side brace 36 and the C pillar 12 can be effectively achieved by connecting the side brace 36 and the C pillar 12 to each other.

  A portion of the side brace 36 on the lower side of the vehicle body than the upper brace member 38 is constituted by a brace portion 77 of the suspension housing 50. The configuration of the brace portion 77 will be described later together with the description of the configuration of the suspension housing 50.

[suspension]
As shown in FIG. 3, the rear wheel suspension 40 is supported by a suspension housing 50, which will be described later, provided so as to connect the side frame 6 and the wheel house inner 26.

  The suspension 40, which is a main component, is interposed between the wheel and the vehicle body to absorb the shock, and the suspension 40 is provided to be extendable between the wheel and the vehicle body to absorb the vibration of the coil spring 44. A damper 41 is provided.

  The damper 41 is disposed adjacent to the outer side of the side frame 6 in the vehicle body width direction so as to extend in the vehicle body vertical direction. The damper 41 includes a piston rod 42 and a cylinder 43. When the piston rod 42 slides relative to the cylinder 43, the damper 41 is configured to expand and contract in the axial direction. The axis of the damper 41 is arranged to be inclined (offset) inward in the vehicle body width direction toward the vehicle body upper side with respect to the vehicle body vertical direction.

  A lower end portion (not shown) of the cylinder 43 is connected to the wheel via a knuckle or the like. A lower spring seat 47 is attached to an intermediate portion in the longitudinal direction of the cylinder 43. The lower spring seat 47 is fixed to the outer peripheral surface of the cylinder 43 by welding, for example.

  The piston rod 42 is provided so as to protrude from the cylinder 43 to the upper side of the vehicle body. An upper mount 45 is attached to the upper end portion or the vicinity of the upper end of the piston rod 42. The upper mount 45 is fixed to a support surface portion 52 described later in the suspension housing 50. Accordingly, the upper end portion of the damper 41 is connected to the vehicle body via the upper mount 45 and the suspension housing 50.

  A spring receiving portion 72 (described later) functioning as an upper spring seat is provided integrally with the suspension housing 50 at a position below the vehicle body of the upper mount 45 and above the vehicle body of the lower spring seat 47. Since the spring receiving portion 72 is fixed to the piston rod 42 via the upper mount 45, and the lower spring seat 47 is fixed to the cylinder 43, the spring receiving portion 72 and the lower spring seat in the axial direction of the damper 41 are provided. The distance from 47 changes according to the expansion and contraction of the damper 41.

  The coil spring 44 is disposed substantially coaxially with the damper 41 so as to surround the damper 41. Note that the load axis of the coil spring 44 does not necessarily coincide with the axis of the damper 41, and may be arranged to be inclined with respect to the axis of the damper 41.

  The coil spring 44 is interposed between the spring receiving portion 72 of the suspension housing 50 and the lower spring seat 47. A seat rubber 46 is interposed between the coil spring 44 and the spring receiving portion 72, thereby reducing the impact at the time of bumping the rear wheel and thus reducing noise.

  The suspension 40 also has a bump stopper 48 disposed on the axis of the damper 41. The bump stopper 48 is a cylindrical member whose outer diameter changes according to the position in the axial direction, and is made of, for example, rubber or urethane. The bump stopper 48 is fitted to the outside of the piston rod 42 and is disposed between the cylinder 43 and the support surface portion 52 of the suspension housing 50 in the axial direction.

[Suspension housing]
4 to 6 illustrate the suspension housing 50 as a whole. The suspension housing 50 is an aluminum alloy member formed by die casting, for example.

[Support surface]
The suspension housing 50 includes a support surface portion 52 that supports the damper 41 of the suspension 40. The support surface portion 52 is a plate-like portion disposed so as to intersect with the vehicle body vertical direction. The support surface portion 52 has an elongated shape such that the width in the longitudinal direction of the vehicle body is larger than the width in the vehicle width direction. The width of the support surface portion 52 in the vehicle body width direction is maximized at the center of the support surface portion 52 in the longitudinal direction of the vehicle body, and gradually decreases toward the vehicle body front side and vehicle body rear side ends.

  A through hole 53 through which the piston rod 42 of the damper 41 is inserted is provided at the center of the support surface 52 in the longitudinal direction of the vehicle body. The support surface portion 52 is provided with a plurality of bolt insertion holes 54 and 55. The bolt insertion holes 54 and 55 are provided, for example, one by one on the vehicle body front side and vehicle body rear side from the through hole 53. The through hole 53 and the pair of front and rear bolt insertion holes 54 and 55 are arranged side by side with a space in the length direction of the support surface portion 52.

  As shown in FIG. 3, the support surface portion 52 is disposed so as to be orthogonal to the axis of the damper 41 on the outer side in the vehicle width direction and on the upper side of the vehicle body than the side frame 6. An upper mount 45 of the suspension 40 is attached to the upper surface of the support surface portion 52. The upper mount 45 is fixed to the support surface portion 52 by, for example, bolts 49 (see FIGS. 13 and 14) inserted into the bolt insertion holes 54 and 55. Fastening portions by bolts 49 are provided on the vehicle body front side and vehicle body rear side of the damper 41, respectively. The damper 41 is fixed to the support surface portion 52 via the upper mount 45.

  As shown in FIGS. 3 to 6, the suspension housing 50 includes an upper joint surface portion 69 that rises upward from the edge of the support surface portion 52 in the vehicle width direction and is connected to the wheel house inner 26. The upper joint surface 69 is formed at a plurality of joints R1, R2, R3, R4 (see FIG. 11) arranged at intervals in the longitudinal direction of the vehicle body at the upper peripheral edge of the notch 26e in the wheel house inner 26 by, for example, SPR. It is joined.

[Connection]
Further, the suspension housing 50 includes a connection portion 56 that connects the support surface portion 52 to the side frame 6. The connecting portion 56 is disposed so as to intersect the vehicle body width direction and is connected to the side frame 6, the middle joint floor portion 59 extending from the upper edge portion of the lower joint surface portion 58 to the vehicle body width direction, And it has the vertical wall part 60 extended from the edge part of the vehicle body width direction outer side of the middle stage floor part 59 to the edge part of the vehicle body width direction inside of the support surface part 52 toward the vehicle body upper side.

  9 (a), 9 (b), and 9 (c) are respectively a cross-sectional view taken along the line C-C, a cross-sectional view taken along the line DD in FIG. It is EE sectional view taken on the line. As shown in FIGS. 9A to 9C, the cross-sectional shape of the suspension housing 50 as viewed from the front-rear direction of the vehicle body is such that the middle floor 59, the vertical wall 60, and the support surface 52 are formed from the lower joint surface 58. In the portion that reaches the upper joint surface portion 69 via, it has a stepped shape that becomes higher toward the outside in the vehicle body width direction.

  As shown in FIGS. 4 to 6, the lower joint surface portion 58 is formed in a belt shape so as to extend in the longitudinal direction of the vehicle body. The lower edge of the lower joint surface 58 extends in the vehicle longitudinal direction while meandering in a wavy manner. The lower joint surface portion 58 is disposed so as to overlap the surface on the vehicle interior side of the outer wall portion 8d of the side frame 6 (see FIG. 3), and is attached to the side frame 6 by, for example, SPR at a plurality of positions spaced in the length direction. Be joined.

  In the vehicle longitudinal direction, the lower joint surface portion 58 is formed longer than the support surface portion 52. The front end of the lower joint surface portion 58 is located on the vehicle front side with respect to the front end of the support surface portion 52, and the rear end of the lower joint surface portion 58 is located on the vehicle body rear side with respect to the rear end of the support surface portion 52.

  The middle floor 59 is formed to be elongated so as to extend in the longitudinal direction of the vehicle body. The edge of the middle floor 59 on the inner side in the vehicle width direction is formed in an arc shape that slightly bulges toward the inner side in the vehicle width direction when viewed from the vehicle vertical direction.

  As shown in FIG. 3, the middle floor portion 59 is disposed slightly inclined toward the vehicle body upper side toward the vehicle body width direction outer side. An obtuse corner is formed between the middle floor 59 and the lower joint surface 58.

  As shown in FIG. 4, the vehicle body front-rear direction center portion of the vertical wall portion 60 is configured by the vehicle body width direction inner side end portion of the peripheral wall portion 62 extending from the support surface portion 52 to the vehicle body lower side. Each part of the vehicle body front side and the vehicle body rear side rather than the part 62 is formed in flat form.

[Surrounding wall]
As shown in FIGS. 4-7, the surrounding wall part 62 is made into the cylindrical shape extended in a vehicle body up-down direction. As shown in FIG. 8, the inner peripheral surface of the peripheral wall portion 62 has a larger diameter than the through hole 53 of the support surface portion 52 and is arranged concentrically with the through hole 53 when viewed from the axial direction.

  As shown in FIG. 3, the peripheral wall portion 62 is disposed so as to surround the bump stopper 48 of the suspension 40 disposed on the vehicle body lower side of the support surface portion 52. By accommodating the bump stopper 48 in the peripheral wall portion 62 in this way, the bump stopper 48 can be protected from foreign matter, water, and the like.

  Further, since the bump stopper 48 of the suspension 40 can be accommodated in the peripheral wall portion 62 of the suspension housing 50, the bump stopper housing that has been conventionally used as a dedicated component of the suspension 40 can be omitted.

  Therefore, compared to the conventional vehicle body structure in which the vertical wall portion of the suspension housing is disposed at a distance inward of the suspension bump stopper housing in the vehicle body width direction, the vertical wall portion 60 of the suspension housing 50 has the vehicle body width. It can be arranged close to the bump stopper 48 on the outer side in the direction. Therefore, the amount of the suspension housing 50 projecting toward the interior of the vehicle interior is reduced, so that the interior of the vehicle interior such as the luggage compartment space can be expanded at the rear of the vehicle body.

  As shown in FIGS. 4 to 7, the suspension housing 50 is provided with a front wall portion 63 on the vehicle body front side of the peripheral wall portion 62 and a rear wall portion 64 on the vehicle body rear side of the peripheral wall portion 62. The front wall portion 63 and the rear wall portion 64 are flat wall portions arranged so as to intersect with the vehicle body longitudinal direction, and are provided so as to extend from the support surface portion 52 to the vehicle body lower side.

  As shown in FIG. 7, the front wall portion 63 is disposed along the tangential direction at the front end of the peripheral wall portion 62 when viewed from the axial direction of the peripheral wall portion 62, and the rear wall portion 64 is the axis of the peripheral wall portion 62. It is arranged along the tangential direction at the rear end of the peripheral wall 62 as viewed from the direction.

[Spring receiving part]
As shown in FIG. 5, the suspension housing 50 is provided with the aforementioned spring receiving portion 72 that protrudes outward from the middle floor portion 59 in the vehicle body width direction. The spring receiving portion 72 is provided at the lower end portion of the peripheral wall portion 62. More specifically, the spring receiving portion 72 is provided so as to expand in a flange shape outward from the lower edge of the peripheral wall portion 62 in the radial direction. As a result, a through hole formed by the inner peripheral surface of the peripheral wall portion 62 is formed in the central portion of the spring receiving portion 72, and the piston rod 42 of the damper 41 is inserted into the through hole (FIG. 3). reference).

  As shown in FIG. 3, the spring receiving portion 72 is arranged on the outer side in the vehicle body width direction and on the upper side of the vehicle body with respect to the side frame 6, and the upper end portion of the coil spring 44 of the suspension 40 is connected via, for example, a seat rubber 46 I support it. As described above, the suspension housing 50 according to the present embodiment can support not only the damper 41 by the support surface portion 52 but also the coil spring 44 by using the spring receiving portion 72 provided on the middle floor portion 59. It has become.

  Further, since the spring receiving portion 72 provided at the lower end portion of the peripheral wall portion 62 is connected to the middle floor portion 59, the peripheral wall portion 62 is connected to the intermediate step floor portion 59 via the spring receiving portion 72 on the lower end side. It is connected. Furthermore, since the upper end side of the peripheral wall part 62 is connected to the support surface part 52, the support surface part 52 and the middle floor part 59 are connected to each other via the peripheral wall part 62. Thereby, the deformation | transformation of the step-like cross section which consists of the lower side junction surface part 58, the middle step floor part 59, the vertical wall part 60, and the support surface part 52 is suppressed effectively.

  As shown in FIGS. 5 and 8, the lower surface of the spring receiving portion 72 has a substantially circular outline. That is, the portion of the spring receiving portion 72 that receives the load from the coil spring 44 is an annular portion that extends from the outer peripheral portion of the through hole to the outer peripheral portion of the spring receiving portion 72. The area is minimized.

  Protruding portions 73, 74, and 75 that protrude from the spring receiving portion 72 to the vehicle body lower side are provided on the peripheral edge portion of the spring receiving portion 72. A plurality of protrusions 73, 74, 75 are provided at intervals in the circumferential direction.

  The plurality of projecting portions 73, 74, and 75 are, for example, a first projecting portion 73 and a spring receiving portion 72 that are semicircular in plan view and continuously extend along the periphery of the half portion on the outer side in the vehicle width direction of the spring receiving portion 72. A second projecting portion 74 extending in an arc shape in plan view along the periphery of the portion on the vehicle body width side inside and the vehicle body front side from the center of the vehicle body, and the vehicle body width direction inside and the vehicle body rear side from the center of the spring receiving portion 72. It has the 3rd protrusion part 75 extended in planar view circular arc shape along the periphery of a part. The 1st, 2nd, 3rd protrusion part 73,74,75 is arrange | positioned at intervals in the circumferential direction.

  Thus, the protrusions 73, 74, and 75 provided at the peripheral edge of the spring receiving portion 72 have a positioning function for positioning the upper ends of the seat rubber 46 and the coil spring 44 in the radial direction, and the spring receiving portion 72. It also functions as a high-rigidity part that increases the surface rigidity of the plate. Thereby, the support strength of the coil spring 44 by the spring receiving portion 72 is increased.

  In the present embodiment, the high-rigidity portion including the protrusions 73, 74, and 75 is provided so as to intermittently extend along the peripheral edge of the spring receiving portion 72. You may provide continuously over the perimeter of the peripheral part of the spring receiving part 72. FIG.

[Connection between spring receiving part and side frame]
Further, the suspension housing 50 includes connected portions 73 a and 73 b provided so as to protrude downward from the spring receiving portion 72 in order to connect the spring receiving portion 72 to the side frame 6.

  The coupled portions 73a and 73b are provided in a pair of front and rear with an interval in the longitudinal direction of the vehicle body. Each of the connected portions 73 a and 73 b is a rib-like portion that intersects the vehicle body longitudinal direction, and is provided continuously to the circumferential end portion of the first protrusion 73. Further, each of the connected portions 73 a and 73 b protrudes below the vehicle body from the lower end of the first protruding portion 73. The front-side connected portion 73a is disposed adjacent to the vehicle body front side of the second protrusion 74, and the rear-side connected portion 73b is disposed adjacent to the vehicle body rear side of the third protrusion 75. ing.

  As shown in FIG. 12, the spring receiving portion 72 is connected to the side frame 6 via the connected portions 73 a and 73 b provided on the vehicle body lower side and the connecting members 101 and 102.

  A pair of front and rear connecting members 101 and 102 are provided at an interval in the longitudinal direction of the vehicle body. These connecting members 101 and 102 are formed by press-molding a metal plate such as a steel plate, for example.

  The connecting members 101 and 102 are arranged so as to cross the vehicle body longitudinal direction and are connected to the spring receiving portion 72, and are arranged so as to cross the vehicle body width direction so as to cross the vehicle body width of the side frame 6. It has the 2nd connection surface part 104 connected to the direction outer side, and the 3rd connection surface part 105 arrange | positioned so that it may cross | intersect a vehicle body up-down direction, and is connected with the vehicle body downward side of the side frame 6. FIG.

  The second connecting surface portion 104 is joined to the outer surface of the side frame 6 in the vehicle width direction by, for example, welding. The third connecting surface portion 105 is provided so as to extend inward in the vehicle width direction from the lower edge portion of the second connecting surface portion 104, and is joined to the surface on the vehicle body lower side of the side frame 6 by, for example, welding.

  In the front connection member 101, the first connection surface portion 103 is provided so as to extend outward from the front edge portion of the second connection surface portion 104 in the vehicle body width direction. The first connecting surface portion 103 has, for example, a triangular shape that tapers toward the vehicle body lower side when viewed from the vehicle longitudinal direction. The upper end portion of the first connecting surface portion 103 is joined to, for example, a vehicle rear side surface of the connected portion 73a on the front side of the suspension housing 50 by, for example, SPR.

  In the rear connection member 102, the first connection surface portion 103 is provided so as to extend outward from the rear edge portion of the second connection surface portion 104 in the vehicle body width direction. The first connecting surface portion 103 has, for example, a triangular shape that tapers toward the vehicle body lower side when viewed from the vehicle longitudinal direction. The upper end portion of the first connecting surface portion 103 is joined to, for example, the front surface of the vehicle body of the connected portion 73b on the rear side of the suspension housing 50 by, for example, SPR.

  Each of the connecting members 101 and 102 further includes a flange portion 106 that is connected to the outer edge of the first connecting surface portion 103 in the vehicle width direction. The flange portion 106 of the front connection member 101 is provided so as to extend from the first connection surface portion 103 to the vehicle body front side, and the flange portion 106 of the rear connection member 102 extends from the first connection surface portion 103 to the vehicle body rear side. It is provided as follows. The lower end portion of each flange portion 106 is connected to the third connecting surface portion 105.

  The front and rear connecting members 101 and 102 may be provided integrally so that at least one of the second connecting surface portions 104 or the third connecting surface portions 105 is connected.

  As described above, the spring receiving portion 72 is connected to the side frame 6 via the connected portions 73a and 73b and the connecting members 101 and 102, so that the load is applied from the coil spring 44 (see FIG. 3) of the suspension 40. Integration with the side frame 6 is achieved with respect to the behavior when “” is input.

[High rigidity part of vertical wall]
As shown in FIGS. 4 and 7, the vertical wall portion 60 has a groove-shaped front side recess portion 67 extending in the vehicle body vertical direction along the front end portion of the peripheral wall portion 62, and the rear end portion of the peripheral wall portion 62. A groove-shaped rear recess 68 extending in the vertical direction of the vehicle body is provided. The front recess portion 67 and the rear recess portion 68 are respectively provided over the entire height of the vertical wall portion 60.

  Further, the vertical wall portion 60 has a front rib 65 projecting inward in the vehicle width direction from the front side portion of the vehicle body relative to the front side recess portion 67 in the vertical wall portion 60 and a rear side recess portion 68 in the vertical wall portion 60. A rear rib 66 that protrudes inward in the vehicle body width direction from the vehicle body rear side portion is provided. The front rib 65 and the rear rib 66 are provided so as to extend in the vertical direction of the vehicle body. Further, the front rib 65 and the rear rib 66 are provided over the entire height of the vertical wall portion 60.

  The hollow portions 67 and 68 and the ribs 65 and 66 are high-rigidity portions provided so as to extend in the vertical direction of the vehicle body in the vertical wall portion 60, and the surface rigidity of the vertical wall portion 60 is increased by these high-rigidity portions. Has been enhanced.

  As shown in FIG. 4, the vehicle body longitudinal direction position of the front rib 65 in the vertical wall portion 60 and the vehicle body longitudinal direction position of the front bolt insertion hole 54 in the support surface portion 52 overlap each other as viewed from the vehicle body width direction. Yes. Further, in the vehicle longitudinal direction, the vehicle longitudinal direction position of the rear rib 66 in the vertical wall portion 60 and the vehicle longitudinal direction position of the rear bolt insertion hole 55 in the support surface portion 52 overlap each other.

  Thus, when viewed from the vehicle body width direction, the vehicle body longitudinal direction positions of the ribs 65 and 66 of the vertical wall portion 60 are the vehicle body longitudinal position of the fastening portion (see FIGS. 13 and 14) of the upper mount 45 by the bolt 49. And overlap. Therefore, the fastening part to which the load from the damper 41 is input and its peripheral part in the support surface part 52 can be effectively supported by the part provided with the ribs 65 and 66 in the vertical wall part 60.

[Brace part and front load transmission part]
A brace part 77 constituting a part of the side brace 36 (see FIG. 1) and a front side load that transmits a load from the support surface part 52 to the brace part 77 are located on the vehicle body front side of the support surface part 52 in the suspension housing 50. A transmission unit 80 is provided.

  The brace part 77 is provided so as to extend in the vertical direction of the vehicle body on the front side of the vehicle body with respect to the support surface part 52. The brace portion 77 is configured by an open cross-sectional portion that opens to the outside of the passenger compartment. The opening of the brace part 77 is closed from the vehicle compartment outer side by the wheel house inner 26 (see FIG. 11), and thus continues between the brace part 77 and the wheel house inner 26 in the vertical direction of the vehicle body. A closed cross section is formed. The side surface of the brace portion 77 on the inner side in the vehicle width direction is disposed so as to be inclined outward in the vehicle width direction toward the upper side of the vehicle body.

  As shown in FIGS. 4 to 6, the brace portion 77 includes a front surface portion 77 a disposed so as to intersect the vehicle body longitudinal direction, a side surface portion 77 b extending from the inner edge portion in the vehicle body width direction of the front surface portion 77 a to the vehicle body rear side, And it has the rear surface part 77c extended in the vehicle body width direction outer side from the edge part of the vehicle body rear side in the side part 77b, and opposingly arranged by the vehicle body rear side of the front part 77a.

  Reinforcing ribs 78 and 79 are provided inside the brace part 77, and thereby, the cross-sectional deformation of the brace part 77 is suppressed. The reinforcing ribs 78 and 79 are, for example, an upper reinforcing rib 78 and a lower reinforcing rib 79 that are spaced apart in the vertical direction of the vehicle body.

  Each of the reinforcing ribs 78 and 79 is connected to the front surface portion 77a at the vehicle body front side edge portion, to the side surface portion 77b at the vehicle body width direction inner edge portion, and to the rear surface portion 77c at the vehicle body rear side edge portion. Thereby, the internal space of the brace part 77 is partitioned by the reinforcing ribs 78 and 79 in the vertical direction of the vehicle body.

  As shown in FIG. 6, the upper reinforcing rib 78 and the lower reinforcing rib 79 are disposed to be inclined toward the vehicle body lower side toward the vehicle body front side. The upper reinforcing rib 78 and the lower reinforcing rib 79 are disposed substantially parallel to each other when viewed from the vehicle body width direction.

  As shown in FIGS. 4 and 5, the brace portion 77 includes an upper surface portion 77d extending from the vehicle body upper side edge portion of the side surface portion 77b to the vehicle body width direction outer side, and a vehicle body width direction outer edge portion of the upper surface portion 77d from the vehicle body upper side edge portion. An upper flange portion 77e extending to the side, a front rib 77f straddling the vehicle body front side edge portion of the upper surface portion 77d and the vehicle body front side edge portion of the upper flange portion 77e, and a vehicle body rear side edge portion and an upper side of the upper surface portion 77d. A rear rib 77g straddling the vehicle body rear side edge of the flange 77e is provided. The front rib 77f is configured by the upper end portion of the front surface portion 77a, and the rear rib 77g is configured by the upper end portion of the rear surface portion 77c.

  Further, the brace portion 77 includes a front joint surface portion 77h extending from the vehicle body width direction inner edge portion of the front surface portion 77a to the vehicle body front side, an inner joint surface portion 77i extending from the lower edge portion of the side surface portion 77b to the vehicle body width direction, and a rear portion. A rear joint surface portion 77j extending from the lower edge portion of the surface portion 77c to the vehicle body rear side is provided.

  The front joint surface 77h is joined to the wheel house inner 26 by, for example, SPR at a plurality of joints R10, R11, R12, and R13 (see FIG. 11) arranged at intervals in the vertical direction of the vehicle body. The inner joint surface 77i is joined to the cross member 5, and the rear joint surface 77j is joined to the side frame 6 by, for example, SPR (see FIG. 1).

  As shown in FIG. 1, at the upper end of the brace portion 77, the lower end portion of the upper brace member 38 is disposed so as to overlap the upper surface portion 77d, the front rib 77f and the rear rib 77g from the vehicle interior side, For example, it is joined by SPR. As a result, the upper end portion of the brace portion 77 is connected to the lower end portion of the upper brace member 38, whereby the side brace 36 including the upper brace member 38 and the brace portion 77 is configured.

  Further, the lower end portion of the brace portion 77 is connected to the outer end portion in the vehicle width direction of the cross member 5 by being joined to the cross member 5 at the inner joint surface portion 77i. Thereby, the load transmission between the side brace 36 and the cross member 5 is possible.

  As shown in FIGS. 4 and 5, in the suspension housing 50, a partition wall portion 70 is provided between the support surface portion 52 and the front load transmission portion 80, which is disposed along a surface that intersects the vehicle body longitudinal direction. ing.

  On the front side of the vehicle body with the partition wall 70 interposed therebetween, an extension surface portion 83 is provided by extending the upper joint surface portion 69 to the front side of the vehicle body. The extension surface 83 is joined to the wheel house inner 26 by, for example, SPR at a joint R8 (see FIG. 11) at the front peripheral edge of the notch 26e.

  The partition wall portion 70 is provided so as to connect the front edge portion of the upper joint surface portion 69, the front edge portion of the support surface portion 52, and the front edge portion of the vertical wall portion 60. The partition wall portion 70 is disposed so as to protrude from the front edge portion of the support surface portion 52 to the vehicle body width direction inner side and the vehicle body upper side, and the portion of the partition wall portion 70 that protrudes from the support surface portion 52 to the vehicle body upper side is For example, a triangular rib 70a tapering toward the upper side of the vehicle body is configured (see FIG. 4).

  The lower part of the vehicle body from the support surface part 52 in the partition wall part 70 is formed in, for example, a triangular shape that tapers toward the lower side of the vehicle body when viewed from the front-rear direction of the vehicle body (see FIG. 5). The lower end portion of the partition wall portion 70 is connected to the outer edge portion in the vehicle width direction of the middle floor portion 59.

  The front load transmitting portion 80 has a connecting surface portion 81 that connects the front edge portion of the support surface portion 52 to the rear surface portion 77 c of the brace portion 77. The connecting surface portion 81 is disposed along a surface that intersects the vehicle body vertical direction, and is provided so as to extend from the partition wall portion 70 to the vehicle body front side. The connecting surface portion 81 is disposed so as to be inclined toward the vehicle body lower side toward the vehicle body front side when viewed from the vehicle body width direction (see FIG. 6).

  The outer edge portion of the connecting surface portion 81 in the vehicle width direction is continuous with the lower edge portion of the extended surface portion 83 through the corner portion. That is, the connection surface portion 81 is provided so as to extend from the lower edge portion of the extension surface portion 83 to the inner side in the vehicle body width direction.

  In the vertical direction of the vehicle body, the rear edge portion of the connection surface portion 81 is disposed at substantially the same height as the support surface portion 52. That is, the rear edge portion of the connection surface portion 81 is connected to the front edge portion of the support surface portion 52 through the partition wall portion 70. The rib 70 a described above is provided across the boundary between the upper joint surface 69 and the extended surface 83 and the rear edge of the connecting surface 81. The lower end portion of the rib 70a is provided over substantially the entire width of the rear edge portion of the connecting surface portion 81 in the vehicle body width direction (see FIG. 13).

  The support surface portion 52 and the connection surface portion 81 are effectively supported by the wheel house inner 26 via the rib 70a, the upper joint surface portion 69, and the extension surface portion 83 thus provided, and the support surface portion 52 and the connection surface portion are connected. The surface rigidity of the surface portion 81 is enhanced by the rib 70a. Further, when a load is input from the damper 41 of the suspension 40 to the support surface portion 52, the load transmitted from the support surface portion 52 directly or through the upper joint surface portion 69 to the rib 70a is transmitted from the lower end portion of the rib 70a to the connecting surface portion 81. Are distributed over the entire width of the rear end of the input.

  Further, the front load transmitting portion 80 has a side surface portion 82 that extends from the inner edge of the connecting surface portion 81 in the vehicle width direction to the vehicle body lower side. The side surface portion 82 is provided so as to extend from the inner edge portion of the partition wall portion 70 in the vehicle width direction to the vehicle body front side. The lower edge portion of the side surface portion 82 is connected to the outer edge portion in the vehicle body width direction of the middle floor portion 59 through the corner portion. The width of the side portion 82 in the vertical direction of the vehicle body gradually decreases toward the front side of the vehicle body.

  As shown in FIG. 10, the front load transmitting portion 80 forms an L-shaped open section composed of a connecting surface portion 81 and a side surface portion 82. That is, the front load transmitting portion 80 is formed in an open cross-sectional shape continuously in the vehicle body longitudinal direction.

  The cross section formed by the front load transmission portion 80 does not necessarily have an open cross section, and a part of or the entire front load transmission portion 80 is separated from the suspension housing 50 and another member such as the wheel house inner 26. A closed section may be formed between the suspension housings 50, or a closed section may be formed by the suspension housing 50 alone.

  The suspension housing 50 is not joined to the wheel house inner 26 at the front load transmitting portion 80, but is joined to the wheel house inner 26 at the joint R8 adjacent to the upper side of the vehicle body of the front load transmitting portion 80. Also, the joint portion R9 adjacent to the lower side of the vehicle body of the front load transmitting portion 80 is joined to the wheel house inner 26 by SPR, for example. The joint R9 is provided on the lower joint surface 58 in a region occupied by the side surface 82 in the vehicle longitudinal direction.

  As described above, in the suspension housing 50, the front load transmitting portion 80 is provided between the support surface portion 52 and the brace portion 77 that is spaced apart from the vehicle body front side. Thereby, when a load is input from the damper 41 of the suspension 40 to the support surface portion 52, the load transmission from the support surface portion 52 to the brace portion 77 can be effectively performed by passing through the front load transmission portion 80.

  Further, this load transmission is performed via the connecting surface portion 81 inclined toward the vehicle body lower side toward the vehicle body front side, whereby a load including a downward component in the vehicle body vertical direction can be input to the brace portion 77. it can. Therefore, in the brace part 77, it becomes easy to realize the load transmission in the direction from the upper end to the lower end, so that the load transmission from the brace part 77 to the cross member 5 on the lower end side can be performed smoothly. , The effect of distributing the load to each part of the vehicle body can be enhanced.

  As shown in FIG. 6, the connecting surface portion 81 of the front load transmitting portion 80 is provided so as to extend from the front end portion of the support surface portion 52 toward the upper reinforcing rib 78 provided inside the brace portion 77. Further, the rear end portion of the upper reinforcing rib 78 is disposed at substantially the same height as the front end portion of the connecting surface portion 81 of the front load transmitting portion 80 in the vertical direction of the vehicle body.

  Due to the positional relationship between the connecting surface portion 81 and the upper reinforcing rib 78, the load input portion from the connecting surface portion 81 in the brace portion 77 is effectively reinforced by the upper reinforcing rib 78. In addition, since the upper reinforcing rib 78 is disposed to be inclined toward the lower side of the vehicle body toward the front side of the vehicle body, the upper reinforcing rib 78 can transmit a load in a direction from the upper end to the lower end. Therefore, the load input from the front load transmitting portion 80 to the brace portion 77 can be effectively transmitted to the lower end side of the brace portion 77.

  Further, the rear end portion of the lower reinforcing rib 79 provided inside the brace portion 77 is disposed at substantially the same height as the front lower end portion of the side surface portion 82 of the front load transmitting portion 80 in the vertical direction of the vehicle body. Yes. Thereby, in the brace portion 77, the load input portion from the lower end portion of the front load transmitting portion 80 is effectively reinforced by the lower reinforcing rib 79. Further, the lower reinforcing rib 79 arranged to be inclined toward the vehicle body lower side toward the vehicle body front side can transmit a load in the direction from the upper end to the lower end. Therefore, the load transmission from the front load transmission part 80 to the cross member 5 via the brace part 77 can be performed more effectively.

[Rear load transmission part]
As shown in FIGS. 4 to 6, the load input from the suspension 40 to the support surface portion 52 is transmitted to the load transmission portion 27 of the wheel house inner 26 at the rear side of the vehicle body with respect to the support surface portion 52 in the suspension housing 50. A rear load transmitting portion 85 is provided.

  In the suspension housing 50, a partition wall portion 71 is provided between the rear load transmission portion 85 and the support surface portion 52, which is disposed along a plane that intersects the vehicle body longitudinal direction.

  The partition wall portion 71 is provided so as to connect the rear edge portion of the upper joint surface portion 69, the rear edge portion of the support surface portion 52, and the rear edge portion of the vertical wall portion 60. The partition wall portion 71 is disposed so as to protrude from the rear edge portion of the support surface portion 52 to the vehicle body width direction inner side and the vehicle body upper side.

  A portion of the partition wall 71 that is on the lower side of the vehicle body with respect to the support surface portion 52 is formed in, for example, a triangular shape that tapers toward the lower side of the vehicle body when viewed from the front-rear direction of the vehicle body (see FIG. 5). A lower end portion of the partition wall portion 71 is connected to an outer edge portion in the vehicle width direction of the middle floor portion 59.

  In the suspension housing 50, a communication surface portion 84 is provided on the vehicle body rear side of the support surface portion 52 as a communication portion that connects the support surface portion 52 to the rear load transmission portion 85. The communication surface portion 84 is disposed so as to intersect the vehicle body vertical direction, and is provided so as to extend from the partition wall portion 71 to the vehicle body rear side. In the vertical direction of the vehicle body, the connecting surface portion 84 is disposed at a height position that is substantially the same as the support surface portion 52 or adjacent to the vehicle body lower side. As a result, the connecting surface portion 84 is connected to the vehicle body rear side of the support surface portion 52 via the partition wall portion 71.

  Further, in the suspension housing 50, a rear wall portion 92 facing the vehicle body rear side of the partition wall portion 71 on the vehicle body rear side of the connecting surface portion 84, and a vehicle body width direction outer edge portion of the rear wall portion 92 from the vehicle body rear side. An extending rear joint surface portion 94 is provided. The connecting surface portion 84 is constructed between the partition wall portion 71 and the rear wall portion 92. The rear joint surface portion 94 is joined to the wheel house inner 26 by, for example, SPR at a plurality of joint portions R5, R6, and R7 (see FIG. 11) arranged at intervals in the vertical direction of the vehicle body.

  Further, the suspension housing 50 includes a side wall portion 91 extending from the inner edge of the connecting surface portion 84 in the vehicle width direction to the vehicle body lower side. The side wall 91 is constructed between the inner edge of the partition wall 71 in the vehicle width direction and the inner edge of the rear wall 92 in the vehicle width direction. The lower end of the side wall 91 is connected to the outer edge of the middle floor 59 in the vehicle width direction.

  Each of the partition wall portion 71 and the rear wall portion 92 on the lower side of the vehicle body than the connecting surface portion 84 and the side wall portion 91 include a lower extension 90 extending from the connecting surface portion 84 to the lower side of the vehicle body. The lower extension 90 is formed in a U-shaped cross section that opens toward the outside in the vehicle width direction (see FIG. 7). That is, the lower extension 90 is formed in an open cross section continuously in the vertical direction of the vehicle body.

  The cross-sectional portion formed by the lower extension 90 may not necessarily be an open cross-section, and the suspension housing 50 and another member such as the wheel house inner 26 may be partly or entirely of the lower extension 90. A closed section may be formed between the suspension housings 50, or a closed section may be formed by the suspension housing 50 alone.

  As shown in FIG. 4, a front rib 71a and a rear rib 92a are provided on the upper side of the vehicle body of the lower extension 90 so as to face each other with a space therebetween in the longitudinal direction of the vehicle body. Each of the ribs 71a and 92a is formed in, for example, a triangular shape that tapers toward the vehicle body upper side.

  The front rib 71 a is configured by a portion of the partition wall portion 71 that protrudes to the upper side of the vehicle body from the connecting surface portion 84, and is provided across the rear edge portion of the upper joint surface portion 69 and the front edge portion of the connecting surface portion 84. ing. The lower end portion of the front rib 71a is provided over substantially the entire width of the front edge portion of the connecting surface portion 84 in the vehicle body width direction.

  The rear rib 92 a is configured by a portion protruding from the connecting surface portion 84 in the rear wall portion 92 to the vehicle body upper side, and straddles the front edge portion of the rear joint surface portion 94 and the rear edge portion of the connecting surface portion 84. Is provided. The rear rib 92a is provided over substantially the entire width of the rear edge portion of the connecting surface portion 84 in the vehicle body width direction.

  The rear load transmitting portion 85 is provided so as to extend from the outer edge of the connecting surface portion 84 in the vehicle width direction to the vehicle body upper side. The rear load transmitting portion 85 includes a front surface portion 86 that extends inward in the vehicle body width direction from the rear edge portion of the upper joint surface portion 69, a side surface portion 87 that extends from the inner edge portion of the front surface portion 86 in the vehicle width direction, and a side surface The rear surface portion 88 extends outward from the rear edge of the portion 87 in the vehicle body width direction. The outer edge portion of the rear surface portion 88 in the vehicle width direction is continuous with the front edge portion of the rear joint surface portion 94.

  The front portion 86 is disposed to be inclined toward the front side of the vehicle body toward the outer side in the vehicle body width direction. The rear surface portion 88 is disposed so as to be inclined rearward of the vehicle body toward the outer side in the vehicle width direction. An obtuse corner portion is formed between the side surface portion 87 and the front surface portion 86 and between the side surface portion 87 and the rear surface portion 88. Thereby, the cross-sectional shape of the rear side load transmission part 85 becomes a hat shape expanded toward the vehicle body width direction outer side. Thus, in the rear side load transmission part 85, the open cross section open | released toward the vehicle body width direction outer side is continuously formed in the vehicle body up-down direction.

  The cross section formed by the rear load transmitting portion 85 is not necessarily an open cross section. In a part or the whole of the rear load transmitting portion 85, the suspension housing 50 and the wheel house inner 26 are separated. A closed cross-section may be formed between the members and the suspension housing 50 alone to form a closed cross-section.

  As shown in FIGS. 13 and 14, the rear load transmitting portion 85 is disposed so as to overlap the vehicle interior side surface of the lower end portion of the load transmitting portion 27 of the wheel house inner 26. It is connected to the lower end.

  As shown in FIG. 15, the cross-sectional shape of the rear load transmission portion 85 is a shape along the surface of the load transmission portion 27 on the vehicle interior side. The outer side surface of the rear load transmitting portion 85 is in contact with the inner surface of the lower end portion of the load transmitting portion 27. More specifically, the front surface portion 86, the side surface portion 87, and the rear surface portion 88 of the rear load transmission portion 85 are on the vehicle interior side of the front surface portion 27 a, the side surface portion 27 b, and the rear surface portion 27 c at the lower end portion of the load transmission portion 27. It touches each of the faces.

  The front edge portion of the rear load transmitting portion 85 is connected to the connecting surface portion 84 via the front rib 71a, and the rear edge portion of the rear load transmitting portion 85 is connected to the connecting surface portion 84 via the rear rib 92a. . Thereby, the cross-sectional deformation of the rear side load transmission part 85 is suppressed, improving the surface rigidity of the connection surface part 84. FIG.

  Further, the front edge portion of the front surface portion 86 of the rear load transmitting portion 85 is integrated with the outer edge portion of the front rib 71a in the vehicle width direction, so that the rear edge portion of the rear surface portion 88 is the rear rib 92a. By being integrated with the outer edge of the vehicle body width direction, each is formed thick. Thereby, the surface rigidity of the front surface part 86 and the rear surface part 88 is enhanced.

  Further, the side surface portion 87 of the rear load transmission portion 85 forms an open cross section that is open to the inside in the vehicle body width direction together with the front rib 71a and the rear rib 92a. An open cross section composed of the side surface portion 87, the front rib 71a, and the rear rib 92a is integrated with the open cross section of the rear load transmitting portion 85 and is continuous in the vertical direction of the vehicle body. Thereby, the front and rear ribs 71a and 92a can perform a load transmission function from the connecting surface portion 84 to the vehicle body upper side together with the rear load transmission portion 85.

  Further, the rear load transmitting portion 85 is supported from the inner side in the vehicle body width direction by the pair of front and rear ribs 71a and 92a, so that the rear load transmitting portion 85 is tilted inward in the vehicle body width direction with respect to the connecting surface portion 84. Deformation is effectively suppressed. Therefore, the connection state of the rear load transmission portion 85 with respect to the load transmission portion 27 of the wheel house inner 26 is easily maintained favorably.

  As shown in FIG. 11, the suspension housing 50 includes, for example, an SPR at a joint R1 adjacent to the front side of the vehicle body of the rear load transmission unit 85 and a joint R5 adjacent to the rear side of the vehicle body of the rear load transmission unit 85. To the wheel house inner 26. Accordingly, the relative displacement of the rear load transmission portion 85 with respect to the lower end portion of the load transmission portion 27 of the wheel house inner 26 is effectively suppressed, so that the rear load transmission portion 85 with respect to the lower end portion of the load transmission portion 27 is suppressed. Is well maintained.

  As described above, the support surface portion 52 of the suspension housing 50 is connected to the load transmission portion 27 of the wheel house inner 26 via the communication surface portion 84 and the rear load transmission portion 85. Therefore, the load input from the suspension 40 to the support surface portion 52 of the suspension housing 50 is effectively transmitted to the load transmission portion 27 of the wheel house inner 26 via the connecting surface portion 84 and the rear load transmission portion 85.

  Further, since the connecting surface portion 84 and the rear load transmitting portion 85 are supported from the lower side of the vehicle body by the lower extension portion 90, the deformation of the connecting surface portion 84 and the displacement of the rear load transmitting portion 85 are effectively suppressed. Has been. Therefore, load transmission from the support surface portion 52 to the load transmission portion 27 of the wheel house inner 26 via the communication surface portion 84 and the rear load transmission portion 85 can be effectively realized.

  Further, as shown in FIG. 16, the load transmitting portion 27 of the wheel house inner 26 includes a rear load transmitting portion 85 of the suspension housing 50 and a lower end portion of the outer reinforcing member 34 that extends from the wheel house 24 to the vehicle body upper side. Are linked. Therefore, the load transmitted from the suspension housing 50 to the load transmitting portion 27 of the wheel house inner 26 is effectively transmitted to the upper side of the vehicle body via the outer reinforcing member 34.

[Function and effect]
In the suspension housing 50 configured as described above, the load input from the damper 41 of the suspension 40 to the support surface portion 52 and the input from the coil spring 44 of the suspension 40 to the spring receiving portion 72 when the rear wheel is bumped. The load is transmitted to the lower part of the vehicle body such as the cross member 5 and the side frame 6 via the front load transmission part 80 and the brace part 77, and is also transmitted to the upper part of the vehicle body via the rear load transmission part 85 and the like. This effectively disperses the components in the rear part of the vehicle body.

  More specifically, regarding the load transmission in the suspension housing 50, the load input to the support surface portion 52 is transmitted to the brace portion 77 via the front load transmission portion 80 and to the rear via the connection surface portion 84. It is transmitted to the side load transmission unit 85.

  The load input to the spring receiving portion 72 is transmitted to the support surface portion 52 via the peripheral wall portion 62, the front wall portion 63, the rear wall portion 64, and the vertical wall portion 60, and It can also be transmitted to the front load transmitting part 80 and the lower extension part 90 via. The load transmitted from the spring receiving portion 72 to the lower extension portion 90 via the middle floor portion 59 can be transmitted to the rear load transmission portion 85 connected to the vehicle body upper side.

  The load transmitted from the support surface portion 52 and the spring receiving portion 72 to the rear load transmitting portion 85 is connected to the load transmitting portion 27 of the wheel house 24 connected to the vehicle body upper side, and further to the vehicle body upper side. It is transmitted to the upper part of the vehicle body such as the D pillar 14 via the outer reinforcing member 34, thereby realizing effective load distribution to the upper side of the vehicle body.

  Therefore, even if a load including an inward component in the vehicle body width direction is input from the damper 41 and the coil spring 44 of the suspension 40 to the support surface portion 52 and the spring receiving portion 72 of the suspension housing 50, the stress due to the load is supported. By suppressing the concentration on the surface portion 52 and the spring receiving portion 72, it is possible to effectively suppress the deformation (inward falling deformation) in which the suspension housing 50 falls to the vehicle interior side.

  Further, since the spring receiving portion 72 is connected to the side frame 6 via the connecting members 101 and 102, the behavior of the spring receiving portion 72 and the side frame 6 is integrated, so that the bumps of the rear wheel In some cases, the relative displacement of the spring receiving portion 72 with respect to the side frame 6 is suppressed, so that the inward-turning deformation of the suspension housing 50 can be more effectively suppressed.

  While the present invention has been described with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments.

  For example, in the above-described embodiment, the example in which the connecting members 101 and 102 (see FIG. 12) for connecting the spring receiving portion 72 of the suspension housing 50 to the side frame 6 are separate from the suspension housing 50 has been described. The spring receiving portion 72 may be connected to the side frame 6 via a connecting portion provided integrally with the suspension housing 50.

  Further, in the above-described embodiment, in the suspension housing 50, the front load transmitting portion 80 that transmits a load from the support surface portion 52 to the brace portion 77 is an L-shaped open cross-section portion that opens outward in the vehicle body width direction (FIG. 10). However, the cross-sectional shape of the front load transmitting portion 80 is not particularly limited, and may be, for example, an open cross-sectional shape opened to the inner side in the vehicle body width direction or a closed cross-sectional shape.

  Furthermore, in the above-described embodiment, the example in which the suspension housing 50 is made of an aluminum alloy has been described. However, the material of the suspension housing 50 is not particularly limited, and for example, a metal material other than an aluminum alloy, or CFRP ( Carbon fiber reinforced plastic). In addition, the suspension housing 50 is not necessarily a die-cast molded product, and may be a cast product, a forged product, or a press-formed product, for example. Further, the suspension housing 50 does not necessarily have to be integrally formed as a whole, and may be formed by joining a plurality of members.

  Furthermore, in the above-mentioned embodiment, although the load transmission part 27 of the wheel house 24 is comprised by the wheel house inner 26 (refer FIGS. 13-16), the load transmission part 27 is the wheel house inner 26 and this. It may be comprised with the attached another member, and may be comprised only with the member attached to the wheel house inner 26. FIG. Moreover, in the above-mentioned embodiment, although the load transmission part 27 is formed in the open cross-sectional shape over the full length, a part or whole of the load transmission part 27 may be formed in a closed cross-sectional shape.

  In addition, the “high rigidity portion” in the present specification means a portion configured to be less likely to be deformed than the surrounding portion. Specific examples of the “highly rigid portion” include a convex portion, a concave portion, a rib, or a thick portion.

  As described above, according to the present invention, a rear vehicle body structure that can effectively disperse a load input from the suspension member to the suspension housing is provided. Therefore, the automobile manufacturing industry field having this type of vehicle body structure is provided. There is a possibility that it is preferably used.

DESCRIPTION OF SYMBOLS 1 Car 2 Floor panel 5 Cross member 6 Side frame 10 Roof side rail 12 C pillar 14 D pillar 20 Side panel 24 Wheel house 25 Wheel house outer 26 Wheel house inner 27 Load transmission part (second load transmission part) of wheel house
32 Outer pillar member 34 Outer reinforcement member (load transmission member)
36 Side brace 38 Upper brace member 40 Suspension 41 Damper 42 Piston rod 43 Cylinder 44 Coil spring 46 Seat rubber 48 Bump stopper 50 Suspension housing 52 Support surface portion (support portion)
56 connecting portion 58 lower joint surface portion 59 middle floor portion 60 vertical wall portion 62 peripheral wall portion 63 front wall portion 64 rear wall portion 67, 68 hollow portion 65, 66 rib 69 upper joint surface portion 71a rib 73, 74, 75 projecting portion 77 Brace part 78, 79 Reinforcement rib 80 Front load transmission part 81 Connection surface part 82 Side surface part 84 Connection surface part (connection part)
85 Rear load transmission part (first load transmission part)
90 Lower extension 91a Rib 101, 102 connecting member

Claims (7)

A wheel house provided on the side of the rear of the vehicle body,
A side frame extending in the longitudinal direction of the vehicle body in the vehicle body width direction of the wheel house;
A cross member extending in the vehicle body width direction and connected to the side frame at an end in the length direction;
A load transmitting member extending from the wheel house to the vehicle body upper side;
A suspension member disposed outside the side frame in the vehicle body width direction;
A support portion that supports the suspension member; and a brace portion that extends in the vertical direction of the vehicle body on the front side of the vehicle body relative to the support portion and is connected to the cross member at a lower end portion, and the side frame and the wheel A vehicle rear body structure comprising a suspension housing connecting the house,
A first load transmitting portion formed in an open cross-sectional shape or a closed cross-sectional shape continuously in the vertical direction of the vehicle body on the vehicle rear side portion of the suspension housing relative to the support portion;
The wheel house includes a second load transmitting portion that is formed in an open cross-sectional shape or a closed cross-sectional shape continuously in the vertical direction of the vehicle body and connects the first load transmitting portion and a lower end portion of the load transmitting member. A vehicle body structure for a rear portion of a vehicle. The suspension housing includes a connecting portion that continues to the vehicle body rear side of the support portion,
2. The rear body structure of the vehicle according to claim 1, wherein the first load transmission portion is provided so as to extend from the communication portion to a vehicle body upper side.   The rear body structure of a vehicle according to claim 2, wherein the suspension housing includes a rib that connects an edge portion of the first load transmission portion on the vehicle body front side and the connecting portion.   4. The rear vehicle body of the vehicle according to claim 2, wherein the suspension housing includes a rib that connects an edge of the first load transmission portion on the vehicle body rear side and the connecting portion. 5. Construction.   The suspension housing is provided with a lower extension portion that is provided so as to extend from the connecting portion to the vehicle body lower side and that is continuously formed in an open section shape or a closed section shape in the vehicle body vertical direction. The rear body structure of the vehicle according to any one of claims 2 to 4.   The said 1st load transmission part has a cross-sectional shape along the surface by the side of the vehicle interior in the lower end part of the said 2nd load transmission part, The any one of Claims 1-5 characterized by the above-mentioned. Rear body structure of the vehicle.   The vehicle according to any one of claims 1 to 6, wherein the suspension housing is joined to the wheel house at a portion adjacent to the first load transmitting portion in a longitudinal direction of the vehicle body. Rear body structure.

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