Rear component for vehicle

Abstract

To reduce weight of a vehicle and improve strength and rigidity of the vehicle.SOLUTION: A rear part constituting member 100 is an integrally casted hollow member, which is constituted of a main body part 10, a tower part 40 and a suspension member part 50. The tower part 40 has a closed cross section structure constituted of a right side plate 41, a left side plate 42, a front plate 43 and a rear plate 44.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to the structure of a rear component for a vehicle. More specifically, it relates to the structure of a rear component for a vehicle that houses a suspension device.

Background Art

[0002] In recent years, a vehicle structure has been studied in which the skeletal structure of a vehicle is formed of cast products such as aluminum, and these are joined to form a vehicle body frame. For example, Patent Document 1 discloses a structure in which left and right rear frames extending in the front-rear direction on both sides at the rear of a vehicle, left and right sub towers, and a cross member connecting the left and right rear frames in the vehicle width direction are integrally formed by casting.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the cast product described in Patent Document 1 is a cast product having the same shape as that of a rear frame, a sub tower, and a cross member formed of plate members, and the thickness of the member is thick, so there is room for improvement from the viewpoint of weight reduction of the vehicle.

[0005] Therefore, an object of the present invention is to achieve weight reduction of a vehicle and improvement in strength and rigidity of the vehicle.

Means for Solving the Problems

[0006] The rear component member for a vehicle according to the present invention is a rear component member for a vehicle that is connected to the rear end of a rocker and a rear pillar and extends rearward of the vehicle. It is a hollow member integrally cast and is composed of a main body portion, a tower portion, and a suspension portion. At least a part of the main body portion has a closed cross-section and extends in the vehicle front-rear direction to connect the rear pillar and a rear member behind the vehicle. The tower portion is connected above the main body portion and has a space for accommodating a part of a suspension device. At least a part of the suspension portion has a closed cross-section and extends in the vehicle front-rear direction below the main body portion, and the front end is connected to the rocker and the rear pillar. The tower portion has a closed cross-section structure composed of an inner plate on the inner side in the vehicle width direction, an outer plate on the outer side in the vehicle width direction, a front plate on the front side of the vehicle, and a rear plate on the rear side of the vehicle.

[0007] Thus, by forming the tower portion into a closed cross-section structure, the strength and rigidity of the tower portion in the front-rear direction can be increased.

[0008] In the rear component member for a vehicle according to the present invention, the tower portion includes a ceiling plate connected to the inner plate, the outer plate, the front plate, and the rear plate. The outer plate has a cylindrical concave portion that is recessed toward the inner side in the vehicle width direction and inclined toward the obliquely outer side of the vehicle. The space for accommodating a part of the suspension device may be the internal space of the concave portion.

[0009] Thereby, the strength and rigidity of the tower portion can be further increased.

[0010] In the rear component member for a vehicle according to the present invention, the front plate of the tower portion and the Outer panel front portion of the concave portion of the [the same as the previous one] constitute a triangular columnar cross-section extending upward from the main body portion. The rear plate of the tower portion and the Outer panel rear portion of the concave portion of the [the same as the previous one] may constitute a triangular columnar cross-section extending upward from the main body portion.

[0011] Thereby, the strength and rigidity of the tower portion in the front-rear direction can be improved.

[0012] In the rear component for a vehicle of the present invention, the main body portion has a rectangular or elliptical closed cross-section composed of an upper plate, a lower plate, an inner plate in the vehicle width direction, and an outer plate in the vehicle width direction. The upper plate is notched at the portion where the main body portion is connected to the tower portion, and is divided into a front upper plate located in front of the portion connected to the tower portion and a rear upper plate located behind the portion connected to the tower portion. The lower end of the front plate is connected to the front upper plate, and the lower end of the rear plate is connected to the rear upper plate. The inner plate is connected to the inner plate in the vehicle width direction of the main body portion, and the outer plate is connected to the outer plate in the vehicle width direction of the main body portion. The tower portion and the main body portion may have a closed cross-section structure formed by the front plate, the rear plate, the ceiling plate, the lower plate, the inner plate, the inner plate in the vehicle width direction, the outer plate, and the outer plate in the vehicle width direction.

[0013] Thereby, the main body portion and the tower portion can be made into an integral closed cross-section structure to achieve weight reduction and improve strength and rigidity.

Effects of the Invention

[0014] The present invention can achieve weight reduction of the vehicle and improvement of the strength and rigidity of the vehicle.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0016] Hereinafter, the vehicle rear component 100 of the embodiment (hereinafter referred to as the rear component 100) will be described with reference to the drawings. First, the rear structure 310 of the vehicle 300 including the rear component 100 will be described with reference to FIG. 1. In the following description, the rear structure 310 on the right side of the vehicle 300 will be described. Since the rear structure 310 on the left side of the vehicle 300 is symmetric to the rear structure 310 on the right side, the description thereof will be omitted. In addition, the arrows FR, UP, and RH shown in each figure indicate the front side, the upper side, and the right side of the vehicle 300, respectively. Also, the opposite directions of the arrows FR, UP, and RH indicate the rear side, the lower side, and the left side. Hereinafter, when simply using the front-rear, left-right, and up-down directions for description, unless otherwise specified, it shall indicate the front and rear in the front-rear direction of the vehicle 300, the left and right in the left-right direction, and the up and down in the up-down direction.

[0017] As shown in FIG. 1, the rear structure 310 of the vehicle 300 includes a rocker 81, a rear pillar 84, a rear pillar outer 82, a rear component 100, a rear member 92, a cross connection member 93, a strut 94, a connection member 76, and a roof rail 91.

[0018] The rocker 81 is a structural member extending in the front-rear direction at the side end of the vehicle 300. The rocker 81 has a square closed cross-sectional shape. The rear pillar 84 is attached to the upper surface of the rear end of the rocker 81. The rear pillar outer 82 is connected to the upper part and the front of the rear pillar 84. Also, the lower end of the rear pillar outer 82 is connected to the upper surface of the rear end of the rocker 81. A rear end plate 85 is attached to the rear end of the rocker 81. Thus, the rear pillar 84 and the rear pillar outer 82 are attached to the rear end of the rocker 81.

[0019] The rear structural member 100 is a structural member that is connected to the rear end of the rocker 81 and the rear pillar 84 and extends rearward of the vehicle. The rear structural member 100 is a hollow member formed by integral casting, and is composed of a main body portion 10, a tower portion 40, a suspension portion 50, and a front end block 70. Details of the structure of the rear structural member 100 will be described later with reference to FIGS. 2 to 6.

[0020] The rear member 92 is a structural member with a closed cross-section that is connected to the rear end 19 of the rear structural member 100 and extends rearward of the vehicle. A rear end plate 95 is attached to the rear end of the rear member 92.

[0021] The cross-connecting member 93 is a cross member that connects the rear ends of the upper pedestals 47 of the tower portions 40 of the left and right rear structural members 100 to each other left and right. The strut 94 is a closed cross-section member that connects the upper surface of the rear member 92 and the lower surface of the cross-connecting member 93. The connecting member 76 is a closed cross-section member that connects the front end of the upper pedestal 47 of the tower portion 40 and the upper portion of the front end block 70.

[0022] The roof rail 91 is a structural member that constitutes the roof of the vehicle 300. The roof rail 91 is a long member with a closed cross-section that extends in the front-rear direction at the upper side end portion of the vehicle 300. The central portion of the roof rail 91 is connected to the upper end 83 of the rear pillar outer 82. The roof rail 91 extends obliquely rearward of the vehicle from the upper end 83 of the rear pillar outer 82 toward the upper pedestal 47 of the tower portion 40. Then, the rear end of the roof rail 91 is connected to the upper pedestal 47 of the tower portion 40.

[0023] Next, the structure of the rear structural member 100 will be described with reference to FIGS. 2 to 6. As described above, the rear structural member 100 is a hollow member formed by integral casting, and is composed of a main body portion 10, a tower portion 40, a suspension portion 50, and a front end block 70.

[0024] As shown in FIG. 2, at least a part of the main body portion 10 has a closed cross-section and extends in the vehicle front-rear direction. The front end of the main body portion 10 is connected to the upper half portion 71 of the front end block 70. The general portion of the main body portion 10 is a rectangular closed cross-section portion composed of an upper plate 13, a lower plate 14, a right side plate 11, and a left side plate 12. Here, the right side plate 11 constitutes the outer side plate in the vehicle width direction. Also, the left side plate 12 constitutes the inner side plate in the vehicle width direction. Note that the portion (portion other than the general portion) where the main body portion 10 is connected to the tower portion 40 will be described later.

[0025] The closed cross-sectional shape of the general portion of the main body portion 10 and the closed cross-sectional shape of the rear member 92 are the same shape. Therefore, when the rear member 92 is connected to the rear end 19 of the main body portion 10, the main body portion 10 and the rear member 92 constitute a rear side member, which is a structural member extending rearward from the rear pillar 84 toward the rear of the vehicle.

[0026] Pedestals 15 and 17 are provided on the surface of the right side plate 11. The pedestals 15 and 17 are portions where an arm bracket (not shown) to which the upper arm (not shown) of the suspension device 200 (see FIG. 5) is connected is fixed. Bolt holes 16 and 18 for fixing the arm bracket are provided in the pedestals 15 and 17. Also, as shown in FIG. 3, a pedestal 64A is provided on the surface of the left side plate 12. The pedestal 64A is a portion where a transaxle mount bracket (not shown) for connecting the upper portion of the transaxle (not shown) and the main body portion 10 is fixed. A bolt hole 65A for fixing the transaxle mount bracket is provided in the pedestal 64A.

[0027] Also, as shown in FIG. 4, inside the main body portion 10, first connecting members 20 to 23 are provided. The foremost first connecting member 20 connects the right side plate 11 and the left side plate 12 in the vehicle width direction at a position where a bolt hole 16 in front of the pedestal 15 is provided. The second first connecting member 21 from the front connects the right side plate 11 and the left side plate 12 in the vehicle width direction at a position where a bolt hole 16 behind the pedestal 15 is provided. The third first connecting member 22 from the front connects the right side plate 11 and the left side plate 12 in the vehicle width direction at a position where a bolt hole 18 in front of the pedestal 17 is provided. The fourth first connecting member 23 from the front connects the right side plate 11 and the left side plate 12 in the vehicle width direction at a position where a bolt hole 18 behind the pedestal 17 is provided. Therefore, the first connecting members 20 to 23 connect the right side plate 11 and the left side plate 12 in the vehicle width direction at positions where the arm brackets are fixed. Also, inside the main body portion 10, a second connecting member 25 is provided. The second connecting member 25 connects the right side plate 11 and the left side plate 12 in the vehicle width direction at a position where a bolt hole 65A is provided, or at a position where a transaxle mount bracket is provided.

[0028] Returning to FIG. 2, the suspension portion 50 is a portion that at least partially has a closed cross-section and extends in the vehicle longitudinal direction below the main body portion 10. As shown from FIG. 2 to FIG. 4, the suspension portion 50 includes a right side plate 51, a left side plate 52, a rear plate 53A, and a lower plate 53B. And the suspension portion 50 is a hollow member with a closed cross-section surrounded by the right side plate 51, the left side plate 52, the rear plate 53A, the front end block 70, the lower plate 53B, and the lower plate 14 of the main body portion 10 on the right side, left side, rear side, front side, lower side, and upper side.

[0029] As shown in FIG. 2, a cylindrical opening 54 through which a drive shaft (not shown) of the vehicle 300 passes is provided at the center of the suspension portion 50. In front of the right side plate 51, a recess 55 recessed in a mortar shape is provided. The bottom of the recess 55 is flat. A pedestal 57 is provided at the bottom. Further, on the lower rear side of the right side plate 51, a recess 56 recessed stepwise from the surface of the right side plate 51 is provided. A pedestal 59 is provided at the bottom of the recess 56. An oval opening 61 is provided on the upper rear side of the right side plate 51. The peripheral edge of the opening 61 and the surface of the right side plate 51 are connected by an inclined curved surface. Pedestals 62 are provided at the upper and lower portions of the opening 61, respectively. The pedestals 57 and 59 are portions to which an arm bracket (not shown) to which a lower arm (not shown) of the suspension device 200 is connected is fixed. The pedestal 62 is a portion to which an arm bracket (not shown) to which a middle arm (not shown) of the suspension device 200 is connected is fixed. Bolt holes 58, 60, and 63 for fixing the arm bracket are provided in the pedestals 57, 59, and 60, respectively.

[0030] As shown in FIG. 3, pedestals 66A, 64B, and 66B are provided on the surface of the upper end portion at the rear of the left side plate 52. The pedestal 66A is a portion to which a transaxle mount bracket (not shown) connecting the upper portion of the transaxle (not shown) and the main body portion 10 is fixed. The pedestals 64B and 66B are portions to which a transaxle mount bracket (not shown) connecting the lower portion of the transaxle (not shown) and the main body portion 10 is fixed. Bolt holes 67A, 65B, and 67B for fixing the transaxle mount bracket are provided in the pedestals 66A, 64B, and 66B, respectively.

[0031] As shown in FIG. 4, inside the suspension portion 50, second connecting members 26 and 27 are provided. The second connecting member 26 connects the right side plate 11 and the left side plate 12 in the vehicle width direction at a position where a bolt hole 67A of a pedestal 66A provided on the left side plate 12 is provided. The second connecting member 27 connects the right side plate 51 and the left side plate 52 in the vehicle width direction at positions where bolt holes 65B and 67B of pedestals 64B and 66B provided on the left side plate 12 are provided. The second connecting members 26 and 27 connect the right side plate 51 and the left side plate 52 in the vehicle width direction at a position where a transaxle mounting bracket (not shown) is provided.

[0032] As shown in FIGS. 1 to 3, the front end block 70 is a square closing member where the front end of the main body portion 10 and the front end of the suspension portion 50 are connected. The right end portion of the front end block 70 is connected to the left end portion of the rear pillar 84. Further, the suspension portion 50 is connected to the lower half portion 72 of the front end block 70. Also, as shown in FIG. 3, between the left side plate 52 of the suspension portion 50 and the front end block 70 are connected by ribs 73 and 74. Therefore, the suspension portion 50 is connected to the rear pillar 84 and the rocker 81 via the front end block 70. Also, on the upper portion of the front end block 70, a receiving seat 75 to which the front end of the connecting member 76 is connected is provided. The receiving seat 75 protrudes obliquely upward toward the rear of the vehicle from the upper end of the front end block 70.

[0033] As shown in FIGS. 2 to 4, the tower portion 40 is a portion connected to the upper side of the main body portion 10 and having a recess 46 for accommodating a part of the suspension device 200 (see FIG. 5). The tower portion 40 is composed of a right side plate 41, a left side plate 42, a front plate 43, a rear plate 44, and a ceiling plate 45. The right side plate 41, the left side plate 42, the front plate 43, and the rear plate 44 form a closed cross-sectional structure extending upward from the main body portion 10. Also, an upper pedestal 47 is provided at the right end portion of the ceiling plate 45. As described above, the roof rail 91, the connecting member 76, and the cross-connecting member 93 are connected to the upper pedestal 47. Here, the right side plate 41 and the left side plate 42 are on the Outer side of the Outer panel vehicle width direction Inner and on the Inner panel side of the vehicle width direction to form.

[0034] As shown in FIG. 4, in the portion (portion other than the general portion) where the tower portion 40 of the main body portion 10 is connected, the upper plate 13 is notched. The upper plate 13 is divided into a front upper plate 13A located in front of the portion connected to the tower portion 40 and a rear upper plate 13B located behind the portion connected to the tower portion 40. The lower end of the front plate 43 is connected to the front upper plate 13A so as to rise from the front upper plate 13A of the upper plate 13. Further, the lower end of the rear plate 44 is connected to the rear upper plate 13B so as to rise from the rear upper plate 13B of the upper plate 13. Also, the right side plate 41 is connected to the right side plate 11 of the main body portion 10. Similarly, the left side plate 42 is connected to the left side plate 12 of the main body portion 10. And the upper end of the right side plate 41, the upper end of the left side plate 42, the upper end of the front plate 43, and the upper end of the rear plate 44 are connected by a ceiling plate 45. Also, the lower plate 14 of the main body portion 10 passes in the front-rear direction from the front end block 70 to the rear end 19. Therefore, as shown in FIGS. 4 to 6, the tower portion 40 and the main body portion 10 are composed of the front plate 43, the rear plate 44, the ceiling plate 45, the lower plate 14, the right side plates 11 and 41, and the left side plates 12 and 42, and have a closed cross-sectional shape extending in the vehicle front-rear direction. With this configuration, the strength and rigidity of the tower portion 40 can be increased.

[0035] As shown in FIG. 2, a concave portion 46 is provided in the right side plate 41. The concave portion 46 is a cylindrical depression that is recessed inward in the vehicle width direction and whose central axis is inclined toward the outer side of the vehicle diagonally. As shown in FIG. 6, the upper part of the concave portion 46 is connected to the ceiling plate 45. Also, as shown in FIG. 5, the upper part of a coil spring 204, which is a part of the suspension device 200, and the upper part of a shock absorber 205 are accommodated in the internal space 46A of the concave portion 46.

[0036] As shown in FIG. 5, the front portion 46F of the concave portion 46 of the right side plate 41 and the front plate 43 form a triangular columnar cross section extending upward from the right side plate 11 of the main body portion 10. Similarly, the rear portion 46R of the concave portion 46 and the rear plate 44 form a triangular columnar cross section extending upward from the right side plate 11 of the main body portion 10. With this configuration, the strength and rigidity of the tower portion 40 in the front-rear direction can be increased.

[0037] As described above, the rear component 100 can contribute to weight reduction of the vehicle 300 and improvement of the strength and rigidity of the vehicle 300.

[0038] In the above description, the general part of the main body 10 of the rear component 100 has been described as a square closed cross-sectional part, but it is not limited to this, and for example, it may be an elliptical closed cross-sectional part.

Explanation of Reference Numerals

[0039] 10 Main body, 11, 41, 51 Right side plate, 12, 42, 52 Left side plate, 13 Upper plate, 13A Front upper plate, 13B Rear upper plate, 14, 53B Lower plate, 15, 17, 57, 59, 62, 64A, 64B, 66A, 66B Pedestal, 16, 18, 58, 60, 63, 65A, 65B, 67A, 67B Bolt hole, 19 Rear end, 20 - 23 First connecting member, 25 - 27 Second connecting member, 40 Tower part, 43 Front plate, 44, 53A Rear plate, 45 Ceiling plate, 46, 55, 56 Recess, 46A Internal space, 46F Front part, 46R Rear part, 47 Upper pedestal, 50 Suspension part, 54, 61 Opening, 70 Front end block, 71 Upper half part, 72 Lower half part, 73, 74 Rib, 75 Receiving seat, 76 Connecting member, 81 Rocker, 82 Rear pillar outer, 83 Upper end, 84 Rear pillar, 85, 95 Rear end plate, 91 Roof rail, 92 Rear member, 93 Cross connecting member, 94 Strut, 100 Rear component (rear component for vehicle), 200 Suspension device, 204 Coil spring, 205 Shock absorber, 300 Vehicle, 310 Rear structure.

Claims

1. A rear component for a vehicle that is connected to the rear end of a rocker and a rear pillar and extends rearward of the vehicle, is a hollow member integrally cast and composed of a main body portion, a tower portion, and a suspension portion, at least a part of the main body portion has a closed cross-section and extends in the vehicle front-rear direction to connect the rear pillar and a rear member behind the vehicle, the tower portion is connected above the main body portion and has a space for accommodating a part of a suspension device, at least a part of the suspension portion has a closed cross-section, extends in the vehicle front-rear direction below the main body portion, and the front end is connected to the rocker and the rear pillar, the tower portion has a closed cross-section structure composed of an inner plate on the inner side in the vehicle width direction, an outer plate on the outer side in the vehicle width direction, a front plate on the front side of the vehicle, and a rear plate on the rear side of the vehicle, A rear component for a vehicle, characterized by the above.

2. The rear component for a vehicle according to Claim 1, wherein the tower portion includes a ceiling plate connected to the inner plate, the outer plate, the front plate, and the rear plate, the outer plate has a cylindrical concave portion that is recessed inward in the vehicle width direction and inclined obliquely outward of the vehicle, the space for accommodating a part of the suspension device is the inner space of the concave portion, A rear component for a vehicle, characterized by the above.

3. The rear component for a vehicle according to Claim 2, the front plate of the tower portion and the front portion of the concave portion of the outer plate form a triangular columnar cross-section extending upward from the main body portion, the rear plate of the tower portion and the rear portion of the concave portion of the outer plate form a triangular columnar cross-section extending upward from the main body portion, A rear component for a vehicle, characterized by the above.

4. The rear component for a vehicle according to Claim 2 or 3, the main body portion has a rectangular or elliptical closed cross-section composed of an upper plate, a lower plate, an inner side plate in the vehicle width direction, and an outer side plate in the vehicle width direction, the upper plate is notched at the portion where the main body portion is connected to the tower portion, and is divided into a front upper plate located in front of the portion connected to the tower portion and a rear upper plate located behind the portion connected to the tower portion, the lower end of the front plate is connected to the front upper plate, the lower end of the rear plate is connected to the rear upper plate, the inner plate is connected to the inner side plate in the vehicle width direction of the main body portion, and the outer plate is connected to the outer side plate in the vehicle width direction of the main body portion, The tower part and the main body part have a closed cross-sectional structure formed by the front plate, the rear plate, the ceiling plate, the lower plate, the inner plate, the inner side plate in the vehicle width direction, the outer plate, and the outer side plate in the vehicle width direction. A rear component for a vehicle, characterized by the above.

Images