Vehicle body structure

Abstract

A vehicle body structure improves the rigidity of a vehicle body frame member integrally formed in a state in which left and right suspension tower sections are connected by an intermediate section. A vehicle body structure is provided with a vehicle body frame member (100) integrally molded by casting in a state in which a right rear suspension tower section (110) and a left rear suspension tower section (120) are connected by an intermediate section (130). The vehicle body frame member (100) is provided with a connection member that extends in the left-right direction at a position separated from the intermediate section (130) by a predetermined distance in the front-rear direction or the up-down direction of the vehicle, and that connects the right side and the left side of the vehicle body frame member (100).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a vehicle body structure of, for example, an automobile. BACKGROUND

[0002] For example, in the rear portion of an automobile, a suspension tower portion to which an upper portion of a shock absorber of a suspension device is attached is provided on the right and left sides. A technology of integrally molding a reinforcing member including a suspension tower portion by aluminum die casting is disclosed in Patent Literature 1.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2020-044885 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] Here, from the viewpoint of reducing the number of components of a vehicle body, it is considered that a skeletal member of a rear portion of a vehicle body is integrally molded by casting in a state where a right-side suspension tower portion and a left-side suspension tower portion are joined by a joining portion.

[0008] However, the shock absorber is a member that is long in the up-down direction, and it is necessary to secure the amount of stroke in the up-down direction, and in correspondence thereto, the size of the suspension tower portion in the up-down direction becomes long. If the size of the suspension tower portion in the up-down direction becomes long, it is difficult to secure rigidity only by joining based on the joining portion.

[0009] The present disclosure was completed in view of this, and aims to improve the rigidity of a vehicle body skeletal member that is integrally molded in a state where right and left suspension tower portions are joined by a middle portion in the vehicle width direction.

[0010] SOLUTION TO THE PROBLEM

[0011] To achieve the foregoing object, in one embodiment of the present disclosure, a vehicle body structure can be premised on a vehicle body skeletal member that is integrally molded by casting in a state where a right-side suspension tower portion and a left-side suspension tower portion are joined by a middle portion in the vehicle width direction. The vehicle body skeletal member is provided with a joining member that extends in the left-right direction at a position that is separated by a prescribed distance in the vehicle front-rear direction or the up-down direction from the middle portion, and joins the right side and the left side of the vehicle body skeletal member.

[0012] According to this configuration, since the vehicle body frame member in which the right side suspension tower portion and the left side suspension tower portion are integrally formed via the intermediate portion, the number of components of the vehicle body frame member is reduced. In addition, the right side and the left side of the vehicle body frame member are connected by the different connecting members from the intermediate portion, so the right side suspension tower portion and the left side suspension tower portion can be connected at a plurality of positions by the intermediate portion and the connecting members. In addition, since the connecting members and the intermediate portion are arranged apart in the vehicle front-rear direction or the vehicle up-down direction, the reinforcing effect by the connecting members is improved.

[0013] Also, a right side connecting portion capable of connecting the right side of the connecting member can be provided at the upper portion of the right side suspension tower portion. In addition, a left side connecting portion capable of connecting the left side of the connecting member can be provided at the upper portion of the left side suspension tower portion. According to this configuration, the right side and the left side of the connecting member can be firmly fixed to the upper portion of the right side suspension tower portion and the upper portion of the left side suspension tower portion.

[0014] Also, a right side shock absorber mounting portion that mounts the upper portion of the right side shock absorber of the suspension device can be provided at the right side suspension tower portion. In this case, the right side connecting portion can be provided at a position that is apart upward from the right side shock absorber mounting portion. In addition, a left side shock absorber mounting portion that mounts the upper portion of the left side shock absorber of the suspension device can be provided at the left side suspension tower portion. In this case, the left side connecting portion can be provided at a position that is apart upward from the left side shock absorber mounting portion.

[0015] According to this configuration, the connecting member can be positioned at a position that is higher than the shock absorber mounting portion, so the distance from the intermediate portion can be ensured to be long. Thus, the reinforcing effect by the intermediate portion and the connecting member is further improved.

[0016] Also, the connecting member can include an upper connecting member that connects the upper portion of the right side suspension tower portion and the upper portion of the left side suspension tower portion, and a lower connecting member that connects the lower portion of the right side suspension tower portion and the lower portion of the left side suspension tower portion.

[0017] According to this configuration, the upper portions and the lower portions of the right side suspension tower portion and the left side suspension tower portion can be connected to each other, so the rigidity of the vehicle body frame member can be further improved.

[0018] The upper connecting member can be apart from the intermediate portion toward the rear of the vehicle, and the lower connecting member can be apart from the intermediate portion toward the front of the vehicle. According to this configuration, the lower connecting member, the intermediate portion, and the upper connecting member are arranged in this order from the front of the vehicle toward the rear of the vehicle. Thus, the rigidity of the vehicle body frame member can be further improved.

[0019] The vehicle body structure can include a vehicle floor having a tunnel portion protruding upward and extending in a vehicle front-rear direction at a central portion in a left-right direction; a right side cross member extending from a right side of the vehicle floor to a right side surface of the tunnel portion on an upper surface of the vehicle floor; a left side cross member extending from a left side of the vehicle floor to a left side surface of the tunnel portion on the upper surface of the vehicle floor; and a tunnel member extending on a lower surface of the vehicle floor so as to cross the tunnel portion in the left-right direction. The right side of the right side cross member can be connected to a lower portion of the right side suspension tower portion, and the left side of the left side cross member can be connected to a lower portion of the left side suspension tower portion. The right side of the tunnel member can be connected to the left side of the right side cross member, and the left side of the tunnel member can be connected to the right side of the left side cross member. In this case, the connecting member can be formed by the right side cross member, the left side cross member, and the tunnel member. That is, the right side and the left side of the vehicle body frame member can be connected by the right side cross member, the left side cross member, and the tunnel member for increasing the rigidity of the vehicle floor. Further, the vehicle body frame member can be connected to the tunnel portion having high rigidity by the right side cross member, the left side cross member, and the tunnel member, and thus the rigidity of the vehicle body frame member can be increased.

[0020] The vehicle rear portion of the tunnel portion can be connected to the intermediate portion. Thus, the intermediate portion can be connected to the tunnel portion having high rigidity, and thus the rigidity of the vehicle body frame member can be further increased.

[0021] Effects of Invention

[0022] As described above, the connecting member connecting the right side and the left side of the vehicle body frame member is provided at a position separate from the intermediate portion connecting the right side suspension tower portion and the left side suspension tower portion, and thus the rigidity of the vehicle body frame member can be increased. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a side view of an automobile having the vehicle body structure according to an embodiment of the present application.

[0024] Figure 2 is a plan view of the vehicle body structure.

[0025] Figure 3 is a bottom view of the vehicle body structure.

[0026] Figure 4 is Figure 2 is an IV-IV line sectional view of the automobile.

[0027] Figure 5 is a perspective view of the rear frame member.

[0028] Figure 6 is a plan view of the rear frame member.

[0029] Figure 7 is a front view of a rear skeleton member.

[0030] Figure 8 is a view of a right side portion of the rear skeleton member, as viewed obliquely from above left.

[0031] Figure 9 is a left view of a right side portion of the rear skeleton member.

[0032] Reference Signs

[0033] 1 automobile

[0034] 10 floor panel

[0035] 10a passage member

[0036] 11 passage portion

[0037] 14 right side cross member

[0038] 15 left side cross member

[0039] 110 right side rear suspension tower portion

[0040] 112 right side shock absorber mounting portion

[0041] 118 right side connecting portion

[0042] 120 left side rear suspension tower portion

[0043] 122 left side shock absorber mounting portion

[0044] 128 left side connecting portion

[0045] 130 intermediate portion

[0046] 150 upper connecting member

[0047] 160 lower connecting member

[0048] D1, D2 shock absorber DETAILED DESCRIPTION

[0049] Hereinafter, an embodiment of the present application will be described in detail based on the drawings. Note that the following description of the preferred embodiment is merely an example in nature and is not intended to limit the present application, its application, or its use in any way.

[0050] Figure 1 is a side view of an automobile 1 having a vehicle body structure A according to the embodiment of the present application. Furthermore, in the description of this embodiment, the front side of the vehicle will be simply referred to as "front", the rear side of the vehicle will be simply referred to as "rear", the right side of the vehicle will be simply referred to as "right", and the left side of the vehicle will be simply referred to as "left". The left-right direction of the vehicle is the vehicle width direction.

[0051] Automobile 1 can be, for example, a passenger car, such as a coupe, hatchback, or sedan. Furthermore, automobile 1 can be an automobile equipped with an internal combustion engine that generates driving force to the drive wheels, an electric vehicle equipped with a motor that generates driving force to the drive wheels, or a hybrid vehicle that generates driving force to the drive wheels through an internal combustion engine and a driving force generating motor. The internal combustion engine and motor are components constituting the powertrain PT.

[0052] An engine hood 2 is provided at the front of the vehicle 1. Below the engine hood 2, a front side space R1 for mounting the powertrain PT is provided as needed. Additionally, a rear cover 3 is provided at the rear of the vehicle 1. Below the rear cover 3, a rear side space R2 for accommodating cargo is provided. Alternatively, the powertrain PT may not be mounted in the front side space R1, but rather in the rear side space R2 (not shown). In this case, the front side space R1 can be used as a cargo space. Alternatively, the powertrain may be mounted in both the front side space R1 and the rear side space R2.

[0053] A left-side door 4 and a right-side door (not shown) are respectively provided on the left and right sides of the vehicle 1. Additionally, the vehicle 1 has front wheels 7 and rear wheels 8 on the left and right sides respectively. At least one of the front wheels 7 and rear wheels 8 can be used as a drive wheel.

[0054] A passenger compartment R3 is provided between the front side space R1 and the rear side space R2, serving as a seating space for occupants. For example... Figure 2 As shown, the vehicle body structure A includes a floor plate 10 forming the floor surface of the passenger compartment R3 and a front bulkhead 20 forming the front wall of the passenger compartment R3. In addition, the vehicle body structure A of the automobile 1 includes: a sloping panel 16 that extends upward from the rear end of the floor plate 10 and is sloping in a manner that the further upward it is, the further rearward it is; and a rear panel 17 that extends rearward from the upper end of the sloping panel 16.

[0055] A channel portion 11, bulging upwards and extending in the front-rear direction, is formed in the center of the floor panel 10 in the left-right direction. Additionally, the vehicle 1 includes a right side beam 12 extending in the front-rear direction along the right edge of the floor panel 10 and a left side beam 13 extending in the front-rear direction along the left edge of the floor panel 10. A right hinge pillar 12a extending upwards is provided at the front of the right side beam 12. The right hinge pillar 12a is a component supporting the right-side door. A left hinge pillar 13a extending upwards is provided at the front of the left side beam 13. The left hinge pillar 13a is a component supporting the left-side door 4.

[0056] The front end portion of the tunnel portion 11 is located at the front end portion of the floor panel 10, and the rear end portion of the tunnel portion 11 is located at the rear end portion of the floor panel 10. Thus, the tunnel portion 11 has a shape that continuously extends from the front end portion to the rear end portion of the floor panel 10.

[0057] The vehicle body structure A is provided with a right side beam 14 that extends on the upper surface of the floor panel 10 from the right side of the floor panel 10 to the right side surface of the tunnel portion 11, and a left side beam 15 that extends on the upper surface of the floor panel 10 from the left side of the floor panel 10 to the left side surface of the tunnel portion 11. In this embodiment, two right side beams 14 are provided at intervals from each other in the front-rear direction, and two left side beams 15 are provided at intervals from each other in the front-rear direction. The front side right side beam 14 and the front side left side beam 15 are arranged in alignment on the same line extending in the left-right direction. The rear side right side beam 14 and the rear side left side beam 15 are also arranged in alignment on the same line extending in the left-right direction.

[0058] Each right side beam 14 is formed along the upper surface of the floor panel 10 on the right side of the tunnel portion 11, and is fixed to the upper surface. The right end portion of the right side beam 14 is fixed to the inboard side surface of the right side sill 12, and the left end portion of the right side beam 14 is fixed to the right side surface of the tunnel portion 11.

[0059] Each left side beam 15 is formed along the upper surface of the floor panel 10 on the left side of the tunnel portion 11, and is fixed to the upper surface. The left end portion of the left side beam 15 is fixed to the inboard side surface of the left side sill 13, and the right end portion of the left side beam 15 is fixed to the left side surface of the tunnel portion 11.

[0060] The automobile 1 is a right-hand drive vehicle. Thus, the automobile 1 is provided with a front passenger seat 30 as a left side seat (seat) and a driver seat 40 as a right side seat (seat) on the left and right sides of the tunnel portion 11 in the floor panel 10, respectively. Specifically, the front passenger seat 30 is provided on the left side of the tunnel portion 11 in the floor panel 10, and is arranged between the tunnel portion 11 and the left side sill 13. The driver seat 40 is provided on the right side of the tunnel portion 11 in the floor panel 10, and is arranged between the tunnel portion 11 and the right side sill 12. Thus, the front passenger seat 30 and the driver seat 40 are provided in alignment in the left-right direction with the tunnel portion 11 interposed therebetween.

[0061] The lower portion of the driver seat 40 is mounted to the two right side beams 14. Also, the lower portion of the front passenger seat 30 is mounted to the two left side beams 15. Further, the automobile 1 can be a left-hand drive vehicle, in which case the driver seat 40 can be provided on the left side and the front passenger seat 30 can be provided on the right side. Also, a rear seat can be provided behind the driver seat 40 and the front passenger seat 30.

[0062] As Figure 3 andFigure 4 As shown, the vehicle body structure A has a channel member 10a extending transversely through the channel portion 11 in the left-right direction on the lower surface of the floor plate 10. The channel member 10a is located below the rear right crossbeam 14 and left crossbeam 15 and is a reinforcing member used to suppress deformation such as the downward-opening channel portion 11 opening in the left-right direction.

[0063] The right side of the passage member 10a extends to the right beyond the right side of the passage portion 11, so that it overlaps with the left side of the right crossbeam 14 when viewed from above. The right side of the passage member 10a and the left side of the right crossbeam 14 are fixed to the vehicle floor 10 as an integral unit, for example, by fastening member 14a or the like.

[0064] The left side of the passage member 10a extends to the left of the passage portion 11, so that it overlaps with the right side of the left crossbeam 15 when viewed from above. The left side of the passage member 10a and the right side of the left crossbeam 15 are integrated with the vehicle floor plate 10, for example, by means of a fastening member 15a. That is, the right crossbeam 14 and the left crossbeam 15 are connected via the passage member 10a to form a reinforcing member.

[0065] like Figure 2 and Figure 3 As shown, the front bulkhead 20 extends upward and left and right from the front end of the floor 10 and is a component that separates the passenger compartment R3 from the front space R1 located further forward than the passenger compartment R3. The front end of the passage 11 is connected to the center of the lower part of the front bulkhead 20 in the left and right direction.

[0066] A front casting component 50 is provided at the front of the vehicle 1. The front casting component 50 includes a right front side bracket 60, a left front side bracket 70, a connecting part 80 connecting the right front side bracket 60 and the left front side bracket 70, a right front suspension tower part 51, and a left front suspension tower part 52.

[0067] The front space R1 is provided between the right front side frame 60 and the left front side frame 70. The right front side frame 60, the left front side frame 70, and the connecting part 80 are integrally formed by casting. The rear parts of the left front side frame 70 and the right front side frame 60 are fixed to the front bulkhead 20. In addition, the rear part of the connecting part 80 is fixed to the front bulkhead 20 and the front part of the passage 11. When fixing the right front side frame 60, the left front side frame 70, and the front connecting part 80 to the front bulkhead 20 and the passage 11, various fixing methods can be used, such as welding-based fixing and fastening fixing using fastening members (e.g., self-piercing rivets). Either one of these fixing methods can be used alone, or two or more fixing methods can be used together.

[0068] The vehicle body structure A is provided with a rear vehicle body frame member 100 disposed at the rear. That is, the rear vehicle body frame member 100, which is integrally formed by casting, is disposed above the inclined panel 16. The rear vehicle body frame member 100 is provided with a right rear suspension tower portion 110 and a left rear suspension tower portion 120, and an intermediate portion 130. As shown in Figures 5 to 7 the intermediate portion 130 is provided at a left-right direction intermediate portion of the rear vehicle body frame member 100, and is a portion that links the right rear suspension tower portion 110 and the left rear suspension tower portion 120. The right rear suspension tower portion 110 and the left rear suspension tower portion 120 are integrally formed by casting in a state of being linked by the intermediate portion 130. At the time of manufacturing the rear vehicle body frame member 100, for example, an aluminum die-casting method can be used.

[0069] As shown in Figure 2 the rear of the right rear suspension tower portion 110 is connected to a front end portion of a right rear frame 19a that extends rearward. The right rear frame 19a is disposed at a position that is closer to the vehicle interior than the right side sill 12, and is disposed at a position that is higher than the right side sill 12. Further, at the rear of the left rear suspension tower portion 120, a front end portion of a left rear frame 19b that extends rearward is connected. The left rear frame 19b is disposed at a position that is closer to the vehicle interior than the left side sill 13, and is disposed at a position that is higher than the left side sill 13. A rear panel 17 is provided in a manner that links the right rear frame 19a and the left rear frame 19b.

[0070] As shown in Figures 4 to 7 the right rear suspension tower portion 110 has a right wheel housing portion 111 that forms a wheel housing of a right rear wheel (not shown). The right wheel housing portion 111 extends in the up-down direction and the front-rear direction, and has a concave shape that is recessed toward the vehicle interior and the front side. The right wheel housing portion 111 is open at the rear side and the lower side, and thus has a dome shape.

[0071] The right wheel housing portion 111 has a right bulging portion 111a that bulges toward the vehicle interior, and a right plate portion 111b that extends in the up-down direction and the front-rear direction from an upper portion of the right bulging portion 111a toward the front. A right shock absorber mounting portion 112 is provided near the upper portion of the right bulging portion 111a. The right shock absorber mounting portion 112 is a plate-shaped portion that mounts an upper portion of a right shock absorber D1 of a rear suspension device, and extends in the front-rear direction and the left-right direction. An opening portion 112a is formed in the right shock absorber mounting portion 112.

[0072] A right flange portion 111c is formed in the peripheral portion of the right side panel portion 111b. The right flange portion 111c continuously extends from the upper portion of the right side wheel house portion 111 to the lower portion via the front portion. A right front side connecting portion 113 that connects with the rear end portion of the right side rocker 12 is formed in the front side lower portion of the right side wheel house portion 111. Further, a right rear side connecting portion 114 that connects with the rear end portion of the right side rear frame 19a is formed in the rear side lower portion of the right side wheel house portion 111. The right rear side connecting portion 114 is located at a position that is inward of the vehicle and upward of the right front side connecting portion 113.

[0073] A right side load transmission portion 115 that extends from the right front side connecting portion 113 to the right rear side connecting portion 114 is provided in the lower portion of the right side wheel house portion 111. The right side load transmission portion 115 is inclined in such a manner that the more forward the position, the more outward of the vehicle and the lower the position.

[0074] The left side rear suspension tower portion 120 and the right side rear suspension tower portion 110 are in a left-right symmetrical configuration. Specifically, when taking as the center of symmetry an imaginary line that passes through the center in the left-right direction of the automobile 1 and extends in the front-rear direction, the left side rear suspension tower portion 120 is line-symmetrical with the right side rear suspension tower portion 110, and the right side rear suspension tower portion 110 is line-symmetrical with the left side rear suspension tower portion 120.

[0075] That is, the left side rear suspension tower portion 120 has a left side wheel house portion 121 that forms a wheel house of the left side rear wheel 8 (not shown). The left side wheel house portion 121 extends in the up-down direction and the front-rear direction, and has a concave shape that is recessed inward of the vehicle and forward. Figure 1

[0076] The left side wheel house portion 121 has a left side bulging portion 121a that bulges inward of the vehicle, and a left side panel portion 121b that extends in the up-down direction and the front-rear direction from the upper portion to the front portion of the left side bulging portion 121a. A left side damper mounting portion 122 for mounting the upper portion of the left side damper D2 of the rear suspension device is provided in the vicinity of the upper portion of the left side bulging portion 121a. The left side damper mounting portion 122 has an opening portion 122a.

[0077] A left flange portion 121c is formed in the peripheral portion of the left side panel portion 121b. The left flange portion 121c continuously extends from the upper portion of the left side wheel house portion 121 to the lower portion via the front portion. A left front side connecting portion 123 that connects with the rear end portion of the left side rocker 13 is formed in the front side lower portion of the left side wheel house portion 121. Further, a left rear side connecting portion 124 that connects with the rear end portion of the left side rear frame 19b is formed in the rear side lower portion of the left side wheel house portion 121. The left rear side connecting portion 124 is located at a position that is inward of the vehicle and upward of the left front side connecting portion 123.

[0078] ​A left side load transmission portion 125 extending from the left front side connecting portion 123 to the left rear side connecting portion 124 is provided in the lower portion of the left side wheel house portion 121. The left side load transmission portion 125 is inclined in such a manner that the more toward the front side, the more toward the outer side and the lower side of the vehicle.

[0079] Therefore, for example, the impact load at the time of rear collision is input to the right side wheel house portion 111 via the right rear frame 19a. The impact load input to the right side wheel house portion 111 is transmitted to the right side sill 12 via the right rear side connecting portion 114, the right side load transmission portion 115, and the right front side connecting portion 113. Further, the impact load at the time of rear collision is input to the left side wheel house portion 121 via the left rear frame 19b. The impact load input to the left side wheel house portion 121 is transmitted to the left side sill 13 via the left rear side connecting portion 124, the left side load transmission portion 125, and the left front side connecting portion 123.

[0080] Thus, the rear vehicle body skeletal member 100 is a member that receives the impact load at the time of rear collision and transmits it to the right side sill 12 and the left side sill 13, and therefore needs to be increased in rigidity against the input of the impact load. Therefore, one or a plurality of ribs are integrally formed in the rear vehicle body skeletal member 100.

[0081] As shown in Figs. 1 and 2, the right side wheel house portion 111 is integrally formed with a first right side rib 111a, a second right side rib 111b, a third right side rib 111c, a fourth right side rib 111d, and a fifth right side rib 111e on the inner side of the vehicle in the right side wheel house portion 111. Figures 5 to 7 As shown in Figs. 1 and 2, the right side wheel house portion 111 is integrally formed with a first right side rib 111a, a second right side rib 111b, a third right side rib 111c, a fourth right side rib 111d, and a fifth right side rib 111e on the inner side of the vehicle in the right side wheel house portion 111. Figure 6 Figure 7 As shown in Figs. 1 and 2, the right side wheel house portion 111 is integrally formed with a first right side rib 111a, a second right side rib 111b, a third right side rib 111c, a fourth right side rib 111d, and a fifth right side rib 111e on the inner side of the vehicle in the right side wheel house portion 111.

[0082] As shown in Figs. 1 and 2, the right side wheel house portion 111 is integrally formed with a first right side rib 111a, a second right side rib 111b, a third right side rib 111c, a fourth right side rib 111d, and a fifth right side rib 111e on the inner side of the vehicle in the right side wheel house portion 111. Figure 5 Figure 6 As shown in Figs. 1 and 2, the right side wheel house portion 111 is integrally formed with a first right side rib 111a, a second right side rib 111b, a third right side rib 111c, a fourth right side rib 111d, and a fifth right side rib 111e on the inner side of the vehicle in the right side wheel house portion 111.

[0083] The rear portion of the tunnel portion 11 of the floor panel 10 is connected to the curved plate portion 131 of the intermediate portion 130. Thereby, the intermediate portion 130 can be linked with the tunnel portion 11 having high rigidity.

[0084] ​​The rear body frame member 100 is provided with a long strip-shaped rib 140 that is continuous from the right rear suspension tower portion 110 to the intermediate portion 130 and is continuous to the left rear suspension tower portion 120. The right side portion of the long strip-shaped rib 140 is integrally formed with the front side portion of the right side bulging portion 111a and the right side plate portion 111b. The left side portion of the long strip-shaped rib 140 is integrally formed with the front side portion of the left side bulging portion 121a and the left side plate portion 121b.

[0085] The body structure A is provided with an upper link member 150 that extends in the left-right direction at a position that is apart by a prescribed distance in the front-rear direction or the up-down direction from the intermediate portion 130, and links the right side and the left side of the body frame member 100. The upper link member 150 of this embodiment is a member that links the upper portion of the right rear suspension tower portion 110 and the upper portion of the left rear suspension tower portion 120, and can be called a deck member or the like. The upper link member 150 can be composed of, for example, a plate that is press-formed, or can be composed of an extrusion-formed member.

[0086] In addition, the upper link member 150 is apart upward from the intermediate portion 130, and is also apart rearward from this intermediate portion 130. That is, as shown in FIG. 1, the upper link member 150 is disposed so as to be apart upward from the right side and the left side of the intermediate portion 130, and is also disposed so as to be apart rearward from the right side and the left side of the intermediate portion 130. Figure 8 and Figure 9 As shown in FIG. 1, a right side link portion 118 that is capable of linking the right side of the upper link member 150 is provided at the upper portion of the right rear suspension tower portion 110. The right side link portion 118 is apart upward from the right side damper mounting portion 112, and is in a plate shape that extends in the left-right direction. The right side of the upper link member 150 is fixed to the right side link portion 118 by welding or a fastening member.

[0087] In addition, a left side link portion 128 that is capable of linking the left side of the upper link member 150 is provided at the upper portion of the left rear suspension tower portion 120. The left side link portion 128 is apart upward from the left side damper mounting portion 122, and is in a plate shape that extends in the left-right direction. The left side of the upper link member 150 is fixed to the left side link portion 128 by welding or a fastening member.

[0088] In addition, although not shown, the upper link member 150 can also be a header that is disposed at a position that is separated upward from the upper portions of the right rear suspension tower portion 110 and the left rear suspension tower portion 120.

[0089] As shown in FIG. 1, a right side link portion 118 that is capable of linking the right side of the upper link member 150 is provided at the upper portion of the right rear suspension tower portion 110. The right side link portion 118 is apart upward from the right side damper mounting portion 112, and is in a plate shape that extends in the left-right direction. The right side of the upper link member 150 is fixed to the right side link portion 118 by welding or a fastening member. Figure 4As shown, the right side cross member 14, the left side cross member 15, and the passage member 10a are lower connecting members 160 that connect the lower portions of the right side rear suspension tower portion 110 and the left side rear suspension tower portion 120. That is, the right side of the right side cross member 14 is fixed to the right side sill 12, and the right front side connecting portion 113 formed in the lower portion of the right side rear suspension tower portion 110 is connected to the right side sill 12, so the right side of the right side cross member 14 is connected to the right front side connecting portion 113 of the right side rear suspension tower portion 110 via the right side sill 12. In addition, the left side of the left side cross member 15 is fixed to the left side sill 13, and the left front side connecting portion 123 formed in the lower portion of the left side rear suspension tower portion 120 is connected to the left side sill 13, so the left side of the left side cross member 15 is connected to the left front side connecting portion 123 of the left side rear suspension tower portion 120 via the left side sill 13. Furthermore, the right side of the right side cross member 14 can be directly connected to the lower portion of the right side rear suspension tower portion 110, and the left side of the left side cross member 15 can be directly connected to the lower portion of the left side rear suspension tower portion 120.

[0090] The lower connecting members 160 are separated downward from the intermediate portion 130, and are also separated forward from the intermediate portion 130. Therefore, when viewed from the front, the intermediate portion 130 is disposed between the upper connecting members 150 and the lower connecting members 160. In addition, when viewed from above, the intermediate portion 130 is also disposed between the upper connecting members 150 and the lower connecting members 160.

[0091] (EFFECTS OF THE EMBODIMENT)

[0092] As described above, in the present embodiment, the right side rear suspension tower portion 110 and the left side rear suspension tower portion 120 are integrally formed by casting via the intermediate portion 130. Thereby, the right side rear suspension tower portion 110, the left side rear suspension tower portion 120, and the intermediate portion 130 become one member, so the number of components of the rear vehicle body skeletal member 100 is reduced.

[0093] In addition, the right side rear suspension tower portion 110 and the left side rear suspension tower portion 120 of the rear vehicle body skeletal member 100 are connected by the upper connecting members 150 and the lower connecting members 160. The upper connecting members 150 are separated upward and rearward from the intermediate portion 130, and the lower connecting members 160 are separated downward and forward from the intermediate portion 130, so the portions of the right side rear suspension tower portion 110 and the left side rear suspension tower portion 120 that are separated from each other can be connected to each other using members having high rigidity. Thereby, the rigidity of the rear vehicle body skeletal member 100 can be improved.

[0094] In addition, since the right side rear suspension tower portion 110 and the left side rear suspension tower portion 120 are connected by the right side cross member 14 on which the driver's seat 40 is mounted and the left side cross member 15 on which the front passenger's seat 30 is mounted, the member for mounting the seats and the member for reinforcing the rear vehicle body frame member 100 can be made common, and the increase in the number of parts can be suppressed. In addition, a dedicated member for connecting the right side rear suspension tower portion 110 and the left side rear suspension tower portion 120 can be provided.

[0095] The foregoing embodiments are merely illustrative and are not to be construed in a limiting sense. Furthermore, modifications, changes and substitutions therein can occur to those skilled in the art without departing from the scope of the present application. For example, the upper connecting member 150 can also connect the right side shock absorber mounting portion 112 and the left side shock absorber mounting portion 122. In addition, one of the upper connecting member 150 and the lower connecting member 160 can be omitted. In addition, the upper connecting member 150 can be integrally formed with the right side rear suspension tower portion 110 and the left side rear suspension tower portion 120 by casting. In addition, the lower connecting member 160 can be integrally formed with the right side rear suspension tower portion 110 and the left side rear suspension tower portion 120 by casting. The lower connecting member 160 can not be formed by the right side cross member 14, the left side cross member 15 and the tunnel member 10a, but can be formed by a single member extending in the left-right direction. The lower connecting member 160 can be formed by a stamped sheet member, or can be an extruded member. In addition, the lower connecting member 160 can be integrally formed with the right side rear suspension tower portion 110 and the left side rear suspension tower portion 120 by casting.

[0096] In addition, the present application can also be applied to the front vehicle body structure of the automobile 1. For example, a connecting member for connecting the right side front suspension tower portion 51 and the left side front suspension tower portion 52 of the front cast member 50 can be provided. In this case, the connecting portion 80 of the front cast member 50 becomes a portion corresponding to the intermediate portion.

[0097] Industrial Applicability

[0098] As described above, the present disclosure can be used, for example, for a vehicle body frame member of an automobile.

Claims

1. A vehicle body structure having a vehicle body frame member that is integrally formed by casting in a state where a right side rear suspension tower portion and a left side rear suspension tower portion are connected through a middle portion in a vehicle width direction, characterized by comprising a connecting member that extends in a left-right direction at a position that is separated from the middle portion by a predetermined distance in a vehicle front-rear direction or a vehicle up-down direction, and connects the right side and the left side of the vehicle body frame member.

2. The vehicle body structure according to claim 1, characterized in that a right side connecting portion that is connectable to the right side of the connecting member is provided at an upper portion of the right side rear suspension tower portion, and a left side connecting portion that is connectable to the left side of the connecting member is provided at an upper portion of the left side rear suspension tower portion.

3. The vehicle body structure according to claim 1, characterized in that a right side shock absorber mounting portion that mounts an upper portion of a right side shock absorber of a rear suspension device is provided at the right side rear suspension tower portion, the right side connecting portion is separated upward from the right side shock absorber mounting portion, a left side shock absorber mounting portion that mounts an upper portion of a left side shock absorber of a rear suspension device is provided at the left side rear suspension tower portion, and the left side connecting portion is separated upward from the left side shock absorber mounting portion.

4. The vehicle body structure according to claim 1, characterized in that the connecting member includes: an upper connecting member that connects upper portions of the right side rear suspension tower portion and the left side rear suspension tower portion; and a lower connecting member that connects lower portions of the right side rear suspension tower portion and the left side rear suspension tower portion.

5. The vehicle body structure according to claim 4, characterized in that the upper connecting member is separated from the middle portion toward the rear of the vehicle, and the lower connecting member is separated from the middle portion toward the front of the vehicle, and further comprising: a floor panel that has a passage portion bulging upward and extending in the vehicle front-rear direction formed at a left-right direction central portion; a right side cross member that extends from a right side of the floor panel to a right side surface of the passage portion on an upper surface of the floor panel; a left side cross member that extends from a left side of the floor panel to a left side surface of the passage portion on the upper surface of the floor panel; and a passage member that extends on a lower surface of the floor panel so as to cross the passage portion in the left-right direction, the right side of the right side cross member is connected to a lower portion of the right side rear suspension tower portion, the left side of the left side cross member is connected to a lower portion of the left side rear suspension tower portion, the right side of the passage member is connected to a left side of the right side cross member, the left side of the passage member is connected to a right side of the left side cross member, and the connecting member is formed by the right side cross member, the left side cross member, and the passage member.

7. The vehicle body structure according to claim 5, characterized in that the vehicle body structure further comprises a floor panel that has a passage portion bulging upward and extending in the vehicle front-rear direction formed at a left-right direction central portion, and a rear portion of the passage portion is connected to the middle portion. ​ ​ ​ ​ ​ ​ ​ ​ ​ 6. The vehicle body structure according to claim 1, characterized by ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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