Side beam structure of vehicle

Abstract

Provided is a side beam structure for a vehicle that can improve the efficiency of load transfer to the side of the vehicle by suppressing the peeling of the side beam and the deformation of the cross-sectional shape when a side collision load is input. The side beam (3) includes an inner panel (12) and an outer panel (13), and a reinforcing member (11) disposed in a closed cross section formed by joining the inner panel (12) and the outer panel (13). The reinforcing member (11) includes a first reinforcing member (26) disposed at the upper portion of the side beam (3), and a second reinforcing member (27) disposed below the first reinforcing member (26).

Description

Technical Field

[0001] This invention relates to a side beam structure for a vehicle. Background Technology

[0002] Conventionally, vehicles have side beams located at both ends of the vehicle body floor in the width direction and extending along the longitudinal direction of the vehicle body. For example, the technology disclosed in Patent Document 1 is known as a structure for such side beams.

[0003] The side beam structure disclosed in Patent Document 1 (hereinafter referred to as "conventional art" in this specification) includes: an inner panel forming the inner side in the vehicle width direction; an outer panel forming the outer side in the vehicle width direction; a plurality of partition walls arranged at predetermined intervals along the longitudinal direction of the vehicle body within a closed section formed by joining the inner panel and the outer panel; and load-absorbing members arranged between the partition walls within the closed section.

[0004] The load-absorbing member has a waveform (W-shaped) cross-sectional shape when viewed from the vehicle width direction (see Patent Document 1). Figure 4 This previous technology is a structure that can improve the load absorption performance when a side-impact load is input.

[0005] [Existing Technical Documents]

[0006] [Patent Literature]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 2021-91341 Summary of the Invention

[0008] [The problem the invention aims to solve]

[0009] In addition, during a side collision, the loads input to the side beam include: (1) a load that causes the side beam to deform from the outside of the vehicle width direction toward the inside of the vehicle width direction, and (2) a load that generates a moment (torsion) that causes the side beam to fall toward the inside of the vehicle compartment.

[0010] The load in (1) is a load that causes the cross-sectional shape of the side beam to deform, and the load in (2) is a load that causes the side beam to peel off. However, when the cross-sectional shape of the side beam is deformed or the side beam peels off, it may be difficult to effectively absorb the side impact load and transfer the load to the side of the vehicle body.

[0011] The structures of the prior art were specifically designed for the load absorption performance of (1), but the inventors of this patent application have completed the present invention, which includes structures that can improve the load absorption performance of both (1) and (2).

[0012] The present invention was made in view of the above circumstances, and aims to provide a side beam structure that can improve the load transfer efficiency toward the vehicle body by suppressing the peeling of the side beam and the deformation of the cross-sectional shape when a side collision load is input. This improves the safety of traffic using the vehicle and suppresses the decline in traffic flow.

[0013] [Technical means to solve the problem]

[0014] The first invention of this application is a side beam structure, wherein the side beam, which is disposed at both ends in the width direction of the vehicle floor and extends along the front-rear direction of the vehicle, includes: an inner plate forming the inner side in the width direction; an outer plate forming the outer side in the width direction; and a reinforcing member disposed in a closed section formed by joining the inner plate and the outer plate, wherein the reinforcing member includes: a first reinforcing member disposed on the upper part of the side beam and having a wavy shape when viewed from the width direction; and a second reinforcing member disposed below the first reinforcing member.

[0015] In the second invention of this application, the side beam includes a joining flange that joins the inner plate and the outer plate, the first reinforcing member is joined to the upper wall of the outer plate and extends inward in the vehicle width direction across the joining flange.

[0016] In the third invention of this application, the second reinforcing member is joined to the inner plate.

[0017] In the fourth invention of this application, the first reinforcing member and the second reinforcing member are arranged and configured along the vehicle width direction with the crossbeam provided on the floor.

[0018] In the fifth invention of this application, the second reinforcing member is formed as a box shape that forms a closed cross section with the inner plate.

[0019] In the sixth invention of this application, the second reinforcing member includes an extension that is engaged by the engaging flange.

[0020] In the seventh invention of this application, the second reinforcing member is joined to the inner wall of the inner plate and is formed as a U-shaped cross-section that opens inward in the vehicle width direction when viewed axially from the side beam.

[0021] In the eighth invention of this application, the second reinforcing member extends further outward in the vehicle width direction than the engagement flange.

[0022] [The effects of the invention]

[0023] According to the first invention of this application, a first reinforcing member with a wavy shape is disposed in the upper part of the closed section of the side beam, and a second reinforcing member is disposed below the first reinforcing member in the closed section of the side beam. Therefore, when the side beam is twisted due to the input of a side impact load, the first reinforcing member abuts against the second reinforcing member, and load transfer between the partition wall and the side beam becomes possible.

[0024] The result is that it can suppress the peeling of the side beam and the deformation of the cross-sectional shape when the side collision load is input, and can improve the efficiency of load transfer to the side of the vehicle body.

[0025] According to the second invention of this application, a second reinforcing member is disposed below the first reinforcing member that is joined to the outer panel. Therefore, when the side beam is twisted due to a side impact, the first reinforcing member and the second reinforcing member abut against each other, and the torque (torsional) load input to the outer panel can be transmitted to the side of the vehicle body through the first reinforcing member and the second reinforcing member.

[0026] The result is that it can suppress the peeling of the side beam and the deformation of the cross-sectional shape when the side collision load is input, and can improve the efficiency of load transfer to the side of the vehicle body.

[0027] According to the third invention of this application, a second reinforcing member is disposed below the first reinforcing member attached to the outer panel, and thus when the side beam is twisted due to a side impact, the first reinforcing member and the second reinforcing member abut against each other, and the torque (torsional) load input to the inner panel and the outer panel can be transmitted to the vehicle side via the first reinforcing member and the second reinforcing member.

[0028] The result is that it can suppress the peeling of the side beam and the deformation of the cross-sectional shape when the side collision load is input, and can improve the efficiency of load transfer to the side of the vehicle body.

[0029] According to the fourth invention of this application, the reinforcing member is arranged with the crossbeam in the vehicle width direction, so even if the side beam rotates due to a side collision, the load can be transferred to the high-rigidity crossbeam through the first reinforcing member and the second reinforcing member.

[0030] The result is that it can suppress the peeling of the side beam and the deformation of the cross-sectional shape when the side collision load is input, and can improve the efficiency of load transfer to the side of the vehicle body.

[0031] According to the fifth invention of this application, the second reinforcing member is formed into a box shape that forms a closed section with the inner plate. Therefore, the load transfer efficiency between the first reinforcing member and the second reinforcing member is improved when the first reinforcing member and the second reinforcing member abut against each other, thereby improving the rigidity of the side beam.

[0032] The result is that it can suppress the peeling of the side beam and the deformation of the cross-sectional shape when the side collision load is input, and can improve the efficiency of load transfer to the side of the vehicle body.

[0033] According to the sixth invention of this application, the second reinforcing member includes an extension that is clamped and engaged by the engaging flange. Therefore, the engagement strength between the second reinforcing member and the side beam, as well as the engagement strength between the inner plate and the outer plate, is improved, which can suppress the peeling of the engagement portion of the engaging flange when the side beam rotates, and the peeling of the second reinforcing member from the side beam.

[0034] The result is that it can suppress the peeling of the side beam and the deformation of the cross-sectional shape when the side collision load is input, and can improve the efficiency of load transfer to the side of the vehicle body.

[0035] According to the seventh invention of this application, the second reinforcing member is joined to the inner wall of the inner plate and is formed as a U-shaped cross section that opens inward in the vehicle width direction when viewed from the axial direction of the side beam. Therefore, the load transfer efficiency between the first reinforcing member and the second reinforcing member when they abut against each other is improved, thereby improving the rigidity of the side beam.

[0036] Furthermore, when a side impact load is applied to the second reinforcing member, it presses the lower part of the inner panel against the inside of the vehicle's passenger compartment, thus opposing the force of the upper part of the side beam falling into the passenger compartment.

[0037] The result is that it can suppress the peeling of the side beam and the deformation of the cross-sectional shape when the side collision load is input, and can improve the efficiency of load transfer to the side of the vehicle body.

[0038] According to the eighth invention of this application, the second reinforcing member extends further outward in the vehicle width direction than the joining flange, thus improving the load transfer efficiency between the first and second reinforcing members when they abut against each other, thereby improving the rigidity of the side beam.

[0039] Furthermore, when a side impact load is applied to the second reinforcing member, it presses the lower part of the inner panel against the inside of the vehicle's passenger compartment, thus opposing the force of the upper part of the side beam falling into the passenger compartment.

[0040] The result is that it can suppress the peeling of the side beam and the deformation of the cross-sectional shape when the side collision load is input, and can improve the efficiency of load transfer to the side of the vehicle body. Attached Figure Description

[0041] Figure 1 This is a diagram illustrating the side beam structure of the present invention. Figure 1 (a) is a side view showing the state viewed from the lower edge of the vehicle body. Figure 1 (b) indicates viewing from an oblique angle. Figure 1(a) is a perspective view of the state of the side beams or floor section, etc.

[0042] Figure 2 The diagram is a partial perspective view of a portion of the side beam structure (the part equipped with the reinforcing member) according to the first embodiment of the present invention, and is a perspective view showing the state viewed from the rear.

[0043] Figure 3 yes Figure 2 Sectional view of section AA in the middle.

[0044] Figure 4 The diagram is a partial perspective view of a portion of the side beam structure (the part equipped with the reinforcing member) of the second embodiment of the present invention, and is a perspective view showing the state viewed from the rear.

[0045] Figure 5 yes Figure 4 Cross-sectional view of the BB space.

[0046] [Explanation of Symbols]

[0047] 1: Body

[0048] 2: Floor section

[0049] 3, 50: Side beam

[0050] 4: Front pillar

[0051] 5: Central Pillar

[0052] 6: Rear pillar

[0053] 7: Crossbeam

[0054] 8: Inside the carriage

[0055] 9: Framework Body

[0056] 10: Isolation wall

[0057] 11, 51: Reinforcing components

[0058] 12: Inner panel

[0059] 13: Outer panel

[0060] 14: Inner wall

[0061] 15, 20, 35, 54: Upper wall

[0062] 16, 21, 55: Lower wall

[0063] 17, 18, 22, 23, 38, 39, 56, 57: Joints

[0064] 19: Outer wall

[0065] 24, 25: Joining flanges

[0066] 26: First reinforcing member

[0067] 27, 52: Second reinforcing member

[0068] 28, 29: Flange portion

[0069] 30: Upper surface

[0070] 31: Lower surface (first contact surface)

[0071] 32: Inclined surface

[0072] 33, 59: Connecting parts

[0073] 34: Rolled edge

[0074] 36: Posterior wall

[0075] 37, 53: Sidewall

[0076] 40, 58: Top surface (second contact surface)

[0077] 41: Extension

[0078] 42: Hollow section Detailed Implementation

[0079] The following is a reference. Figures 1 to 3 While describing the first embodiment of the side beam structure of the present invention, and referring to Figure 1 , Figure 4 as well as Figure 5 The second embodiment of the side beam structure of the present invention will be described below.

[0080] <First Implementation>

[0081] The following is a reference. Figures 1 to 3 The first embodiment of the present invention will be described below.

[0082] Figure 1 This is a diagram illustrating the side beam structure of the present invention. Figure 1 (a) is a side view showing the state viewed from the lower edge of the vehicle body. Figure 1 (b) indicates viewing from an oblique angle. Figure 1 (a) is a perspective view of the state of the side beams or floor section, etc. Figure 2 This is a perspective view showing a portion (the area where the reinforcing member is installed) of the side beam structure according to the first embodiment of the present invention, and is a perspective view showing the state viewed from the rear. Figure 3 yes Figure 2 Sectional view of section AA in the middle.

[0083] In addition, the arrows in the diagram represent the up-down, left-right, and front-back directions (the direction of the arrows is set as an example).

[0084] In this embodiment, the application of the side beam structure of the present invention to side beam 3 will be described, wherein the side beam 3 is disposed on... Figure 1 The vehicle width direction of the floor portion 2 of the vehicle body 1 shown in the figure. Figure 1 The middle section extends from both ends in the left and right directions and along the front and rear directions of the vehicle body 1.

[0085] in addition, Figure 1 In the diagram, reference symbol 4 represents "front pillar", reference symbol 5 represents "middle pillar", reference symbol 6 represents "rear pillar", reference symbol 7 represents "crossbeam", and reference symbol 8 represents "inside the carriage".

[0086] The front pillar 4, middle pillar 5, and rear pillar 6 are respectively configured to extend upwards from the front side, roughly the middle, and rear side of the vehicle body 1 as the bottom end, intersecting with the side beams 3. The crossbeam 7 is configured to extend along the width direction of the floor 2 and connect a pair of side beams 3.

[0087] like Figure 2 As illustrated, the side beam 3 includes: a hollow frame body 9 extending along the front-rear direction of the vehicle body 1; a plurality of partition walls 10 disposed inside the frame body 9; and reinforcing members 11 disposed between the partition walls 10.

[0088] like Figure 2 as well as Figure 3 As shown in the figure, the frame body 9 is constructed by joining the inner plate 12, which forms the inner side in the vehicle width direction, and the outer plate 13, which forms the outer side in the vehicle width direction. Hereinafter, the structures of each side beam 3 in this embodiment will be described.

[0089] First, let's explain the inner panel 12.

[0090] like Figure 3 As shown in the figure, the inner panel 12 includes an inner wall 14, an upper wall 15, a lower wall 16, and joints 17 and 18.

[0091] The upper wall 15 is formed such that one end is continuous with the upper end of the inner wall 14 and extends outward in the vehicle width direction. The lower wall 16 is formed such that one end is continuous with the lower end of the inner wall 14 and extends outward in the vehicle width direction.

[0092] The joint 17 is formed to continue at the other end of the upper wall 15 and extends upward orthogonally to the axial direction of the side beam 3. The joint 18 is formed to continue at the other end of the lower wall 16 and extends downward orthogonally to the axial direction of the side beam 3.

[0093] Next, we will explain the outer panel 13.

[0094] like Figure 3 As shown in the figure, the outer panel 13 includes an outer wall 19, an upper wall 20, a lower wall 21, and joints 22 and 23.

[0095] The upper wall 20 is formed such that one end is continuous with the upper end of the outer wall 19 and extends inward in the vehicle width direction. The lower wall 21 is formed such that one end is continuous with the lower end of the outer wall 19 and extends inward in the vehicle width direction.

[0096] The joint 22 is formed to continue at the other end of the upper wall 20 and extends upward orthogonally to the axial direction of the side beam 3. The joint 23 is formed to continue at the other end of the lower wall 21 and extends downward orthogonally to the axial direction of the side beam 3.

[0097] like Figure 3 As shown in the figure, the frame body 9 has a joining flange 24 and a joining flange 25 formed by joining the inner plate 12 and the outer plate 13. The joining flange 24 is formed on the upper side of the frame body 9, and the joining flange 25 is formed on the lower side of the frame body 9.

[0098] The joining flange 24 is formed by joining the joining portion 17 of the inner plate 12 with the joining portion 22 of the outer plate 13. The joining flange 25 is formed by joining the joining portion 18 of the inner plate 12 with the joining portion 23 of the outer plate 13.

[0099] like Figure 3 As shown in the figure, the engagement flanges 24 and 25 are configured to be positioned at approximately the same location in the vehicle width direction and to face each other in the vertical direction.

[0100] Next, the isolation wall 10 will be explained.

[0101] The partition wall 10 is a reinforcing member of the frame body 9. Detailed drawings are omitted, but it is formed in the shape of a plate and is disposed inside the frame body 9, that is, within the closed section formed by joining the inner plate 12 and the outer plate 13. The partition wall 10 is joined to the inner plate 12 and the outer plate 13 at designated locations.

[0102] In this embodiment, the side beam 3 includes multiple partition walls 10, which are arranged at predetermined intervals along the long side of the frame body 9. In this embodiment, two partition walls 10 are provided at both ends of the crossbeam 7 in the floor section 2 (see reference). Figure 1 (b)). In this embodiment, in addition to this, a partition wall 10 is also provided between the middle column 5 and the rear column 6.

[0103] Next, the reinforcing member 11 will be described.

[0104] Figure 2 as well as Figure 3 The reinforcing member 11 shown in the figure is a member that reinforces the frame body 9 and enables load transfer between the partition wall 10 and the side beam 3 when the side beam is twisted due to the input of lateral impact load. The reinforcing member 11 is disposed inside the frame body 9, that is, within the closed section formed by joining the inner plate 12 and the outer plate 13.

[0105] like Figure 2 as well as Figure 3 As illustrated, the reinforcing member 11 comprises two members: a first reinforcing member 26 and a second reinforcing member 27. The first reinforcing member 26 and the second reinforcing member 27 are arranged at a predetermined interval in the vertical direction. The first and second reinforcing members are arranged with the crossbeam 7 in the vehicle width direction (see figure). Figure 1 (b)

[0106] like Figure 2 As shown in the figure, the first reinforcing member 26 is a member formed by bending a metal plate into a prescribed shape, and its shape is wavy (roughly W-shaped) when viewed from the vehicle width direction (left and right direction).

[0107] The first reinforcing member 26 includes: a flange portion 28 and a flange portion 29, which are located at the upper front end and the upper rear end in the front-rear direction and extend in the left-right direction; an upper surface 30, which is located at the upper middle end in the front-rear direction; a lower surface 31, which is located at the lower end between the flange portion 28, the flange portion 29 and the upper surface 30; and an inclined surface 32, which connects the flange portion 28 to the lower surface 31, the upper surface 30 to the lower surface 31, and the flange portion 29 to the lower surface 31.

[0108] Flanges 28 and 29 are formed spanning the inner plate 12 and the outer plate 13, and are formed to be joined to the upper wall 20 of the outer plate 13 (see reference). Figure 3 ).

[0109] like Figure 2 as well as Figure 3 As illustrated, the first reinforcing member 26 is joined to the outer panel 13. Here, "joined" in this embodiment refers to a joint by means of welding.

[0110] like Figure 3 As illustrated, the first reinforcing member 26 is joined to the upper wall 20 of the outer panel 13 and is configured to extend inward in the vehicle width direction, crossing the joining flange 24 and the joining flange 25 (imaginary line L1). Furthermore, Figure 2 as well as Figure 3 In the text, reference symbol 33 indicates the "joint portion" between the first reinforcing member 26 and the outer plate 13.

[0111] On the inclined surface 32, a rolled edge portion 34 is formed from the upper end to the lower end in the middle of the left-right direction. The rolled edge portion 34 is formed in a concave manner on the inclined surfaces 32 that are facing each other and sandwiching the lower surface 31.

[0112] The lower surface 31 is formed such that when the side beam 3 is twisted due to the input of a lateral impact load (see reference). Figure 3 Arrow F1 in the diagram causes the first reinforcing member 26 to rotate (see reference). Figure 3 When arrow F2 is shown in the diagram, it can abut against the second reinforcing member 27. This lower surface 31 can also be referred to as the "first abutment surface".

[0113] like Figure 3 As shown in the figure, the lower surface 31 is formed such that, with the first reinforcing member 26 joined to the inner plate 12 and the outer plate 13, it gradually slopes downward from the inside in the vehicle width direction toward the outside in the vehicle width direction.

[0114] like Figure 2 As illustrated, the second reinforcing member 27 is a member that forms the metal plate into a box shape, such as... Figure 3 As shown in the figure, the cross-sectional shape of the side beam 3 when viewed from the axial direction is a rectangle with openings on the inner side in the vehicle width direction and on the lower surface side.

[0115] like Figure 2 as well as Figure 3 As illustrated, the second reinforcing member 27 includes: an upper wall 35 disposed on the upper end face; a front wall (not shown) and a rear wall 36 continuous at the front and rear ends of the upper wall 35 and extending to the lower end of the second reinforcing member 27; a side wall 37 continuous in a manner connecting the upper wall 35, the front wall and the rear wall 36 and extending downward; and a joint 38 disposed at the free end (open end) of the upper wall 35.

[0116] The upper surface 40 of the upper wall 35 is formed such that when the side beam 3 is twisted due to the input of a lateral impact load (see reference). Figure 3 Arrow F1 in the diagram causes the first reinforcing member 26 to rotate (see reference). Figure 3 When arrow F2 is shown in the diagram, it can abut against the lower surface 31 (first abutment surface) of the first reinforcing member 26. This upper surface 40 can also be referred to as the "second abutment surface".

[0117] In the second reinforcing member 27, the lower end of the sidewall 37 is formed as an extension 41. The extension 41 is held and engaged by the engaging flange 25. More specifically, as Figure 3 As shown in the figure, the extension 41 is clamped and joined by the joining part 18 and the joining part 23.

[0118] By forming the second reinforcing member 27 as described above, a closed section is formed, including the inner wall 14 and lower wall 16 of the inner plate 12 and the upper wall 35 and side wall 37 of the second reinforcing member 27. The space surrounded by the inner wall 14 and lower wall 16 of the inner plate 12 and the upper wall 35 and side wall 37 of the second reinforcing member 27 is formed as a hollow portion 42.

[0119] The joint 38 is formed to be engageable with the inner wall 14 of the inner plate 12 (see reference). Figure 3 The joint 39 is formed to be engageable with the lower wall 16 of the inner plate 12 (see reference). Figure 2 ).

[0120] like Figure 2 as well as Figure 3 As illustrated, the second reinforcing member 27 is joined to the inner wall 14 and the lower wall 16 of the inner plate 12. Here, "joining" in this embodiment refers to a joining by means of welding.

[0121] Next, refer to Figure 1 as well as Figure 3 The effects and benefits obtained through this implementation method will be explained.

[0122] According to this embodiment, a first reinforcing member 26 with a wavy shape, viewed from the vehicle width direction, is disposed in the upper part of the closed section of the side beam 3, and a second reinforcing member 27 is disposed below the first reinforcing member 26 in the closed section of the side beam 3. Therefore, when the side beam 3 is twisted due to the input of the side impact load (see reference...), Figure 3 When arrow F1 is shown in the diagram, the first reinforcing member 26 and the second reinforcing member 27 come into contact, making it possible to transfer the load between the isolation wall 10 and the side beam 3.

[0123] The result is that it can suppress the peeling of the side beam 3 and the deformation of the cross-sectional shape when the side collision load is input, and can improve the load transfer efficiency towards the vehicle body 1.

[0124] Furthermore, according to this embodiment, a second reinforcing member 27 is disposed below the first reinforcing member 26 that is attached to the outer panel 13. Therefore, when the side beam 3 is twisted due to a side collision, the first reinforcing member 26 and the second reinforcing member 27 abut against each other, and the torque (torsional) load input to the outer panel 13 can be transmitted to the side of the vehicle body 1 via the first reinforcing member 26 and the second reinforcing member 27.

[0125] The result is that it can suppress the peeling of the side beam 3 and the deformation of the cross-sectional shape when the side collision load is input, and can improve the load transfer efficiency towards the vehicle body 1.

[0126] Furthermore, according to this embodiment, a second reinforcing member 27 is disposed below the first reinforcing member 26 which is attached to the outer panel 13. Therefore, when the side beam 3 is twisted due to a side collision, the first reinforcing member 26 and the second reinforcing member 27 abut against each other, and the torque (torsional) load input to the inner panel 12 and the outer panel 13 can be transmitted to the vehicle body 1 via the first reinforcing member 26 and the second reinforcing member 27.

[0127] The result is that it can suppress the peeling of the side beam 3 and the deformation of the cross-sectional shape when the side collision load is input, and can improve the load transfer efficiency towards the vehicle body 1.

[0128] Furthermore, according to this embodiment, the reinforcing member 11 is arranged and configured with the crossbeam 7 in the vehicle width direction, so even if the side beam 3 rotates due to a side collision (see reference...). Figure 3 Arrow F1 in the diagram can also transfer the load to the rigid crossbeam 7 via the first reinforcing member 26 and the second reinforcing member 27.

[0129] The result is that it can suppress the peeling of the side beam 3 and the deformation of the cross-sectional shape when the side collision load is input, and can improve the load transfer efficiency towards the vehicle body 1.

[0130] Furthermore, according to this embodiment, the second reinforcing member 27 is formed into a box shape that forms a closed section with the inner plate 12. Therefore, when the first reinforcing member 26 and the second reinforcing member 27 come into contact, the load transmission efficiency between the first reinforcing member 26 and the second reinforcing member 27 is improved, which can improve the rigidity of the side beam 3.

[0131] The result is that it can suppress the peeling of the side beam 3 and the deformation of the cross-sectional shape when the side collision load is input, and can improve the load transfer efficiency towards the vehicle body 1.

[0132] Furthermore, according to this embodiment, the second reinforcing member 27 includes an extension 41 that is clamped and joined by the joining flange 25. Therefore, the joining strength between the second reinforcing member 27 and the side beam 3, as well as the joining strength between the inner plate 12 and the outer plate 13, are improved, which can suppress the peeling of the joining flange 24 and the joining flange 25 at the joint when the side beam 3 rotates, as well as the peeling of the second reinforcing member 27 and the side beam 3.

[0133] The result is that it can suppress the peeling of the side beam 3 and the deformation of the cross-sectional shape when the side collision load is input, and can improve the load transfer efficiency towards the vehicle body 1.

[0134] <Second Implementation>

[0135] In addition to the first embodiment, the side beam structure of the present invention can also adopt the second embodiment described below.

[0136] The following is a reference. Figure 1 , Figure 4 as well as Figure 5 The second implementation method will be explained below.

[0137] Figure 4 This is a perspective view showing a portion (the area where the reinforcing member is installed) of the side beam structure according to the second embodiment of the present invention, and is a perspective view showing the state viewed from the rear. Figure 5 yes Figure 4 Cross-sectional view of the BB space.

[0138] In addition, the arrows in the figure represent the up-down, left-right, and front-back directions, respectively (the direction of the arrow is set as an example). Furthermore, the same symbols are used to mark the same components as in the first embodiment, and detailed descriptions are omitted.

[0139] In this embodiment, the side beam structure of the present invention is applied to... Figure 1 The side beam 50 in the floor section 2 of the vehicle body 1 shown in the figure will be explained. Figure 4 The side beam 50 in this embodiment, as shown in the diagram, replaces the reinforcing member 11 in the first embodiment (see reference). Figure 2 as well as Figure 3 Including the reinforcing member 51, it is otherwise basically the same as the side beam 3 in the first embodiment in terms of composition and structure.

[0140] The reinforcing member 51 in this embodiment is basically the same as the reinforcing member 11 in the first embodiment in terms of composition and structure, except that it includes the second reinforcing member 52. The second reinforcing member 52 will be described below.

[0141] like Figure 4 as well as Figure 5 As illustrated, the second reinforcing member 52 is a member formed by bending a metal plate into a predetermined shape, and is formed into a roughly U-shaped (cap-shaped) cross-section that opens inward in the vehicle width direction when viewed from the axial direction of the side beam 50. The second reinforcing member 52 and the first reinforcing member 26 are arranged at predetermined intervals in the vertical direction.

[0142] The second reinforcing member 52 includes a side wall 53, an upper wall 54, a lower wall 55, and joints 56 and 57.

[0143] The side wall 53 is formed as a portion corresponding to the front end of the second reinforcing member 52. The upper wall 54 is formed such that one end is continuous with the upper end of the side wall 53 and extends inward in the vehicle width direction. The lower wall 55 is formed such that one end is continuous with the lower end of the side wall 53 and extends inward in the vehicle width direction.

[0144] The upper surface 58 of the upper wall 54 is formed such that when the side beam 50 is twisted due to the input of a lateral impact load (see reference). Figure 5 Arrow F3 in the diagram (see figure below) causes the first reinforcing member 26 to rotate (see figure below). Figure 5 When arrow F4 is shown in the diagram, it can abut against the lower surface 31 (first abutment surface) of the first reinforcing member 26. This upper surface 58 can also be referred to as the "second abutment surface".

[0145] The joint 56 is formed to continue from the other end of the upper wall 54 and extend upward. The joint 57 is formed to continue from the other end of the lower wall 55 and extend downward. The joints 56 and 57 are formed to be able to join to the inner wall 14 of the inner plate 12.

[0146] like Figure 4 as well as Figure 5 As illustrated, the second reinforcing member 52 is joined to the inner wall 14 of the inner plate 12. Here, "joint" in this embodiment refers to a joint achieved by welding. Furthermore, Figure 4 as well as Figure 5 In the text, reference numeral 59 indicates the "joint portion" between the second reinforcing member 52 and the inner wall 14 of the inner plate 12.

[0147] The second reinforcing member 52 is formed such that its width in the height direction (vertical direction) gradually narrows as it moves from the inside of the vehicle width direction toward the outside of the vehicle width direction. That is, the width between the upper wall 54 and the lower wall 55 gradually narrows as it moves from the inside of the vehicle width direction toward the outside of the vehicle width direction.

[0148] The second reinforcing member 52 is formed such that, when joined to the inner plate 12, the front end (side wall 53) extends further outward in the vehicle width direction than the joining flange 24 and the joining flange 25 (imaginary line L2).

[0149] Next, refer to Figure 1 as well as Figure 5 This will explain the functions and effects obtained through this embodiment. According to this embodiment, in addition to achieving the same effects as the first embodiment, the following effects are also achieved.

[0150] According to this embodiment, the second reinforcing member 52 is joined to the inner wall 14 of the inner plate 12 and is formed into a U-shaped cross section that opens inward in the vehicle width direction when viewed from the axial direction of the side beam 50. Therefore, the load transmission efficiency between the first reinforcing member 26 and the second reinforcing member 52 when they abut against each other is improved, thereby improving the rigidity of the side beam 50.

[0151] Furthermore, when the side impact load is input to the second reinforcing member 52, it presses the lower part of the inner panel 12 toward the vehicle's interior 8 side, thus opposing the force of the upper part of the side beam 50 falling into the interior 8 side of the vehicle.

[0152] The result is that it can suppress the peeling of the side beam 50 and the deformation of its cross-sectional shape when a side collision load is input, and can improve the load transfer efficiency towards the vehicle body 1.

[0153] Furthermore, according to this embodiment, the second reinforcing member 52 extends further outward in the vehicle width direction than the joining flange 24 and the joining flange 25 (imaginary line L2). Therefore, the load transfer efficiency between the first reinforcing member 26 and the second reinforcing member 52 when they come into contact is improved, thereby increasing the rigidity of the side beam 50.

[0154] Furthermore, when the side impact load is input to the second reinforcing member 52, it presses the lower part of the inner panel 12 toward the vehicle's interior 8 side, thus opposing the force of the upper part of the side beam 50 falling into the interior 8 side of the vehicle.

[0155] The result is that it can suppress the peeling of the side beam 50 and the deformation of its cross-sectional shape when a side collision load is input, and can improve the load transfer efficiency towards the vehicle body 1.

[0156] In addition, various modifications can be made to this invention without changing its spirit.

Claims

1. A side beam structure of a vehicle, wherein, A side beam provided in a floor portion of a vehicle and extending in a front-rear direction of the vehicle includes an inner panel constituting an inner side in a vehicle width direction, an outer panel constituting an outer side in the vehicle width direction, and a reinforcing member provided in a closed section formed by joining the inner panel and the outer panel, the side beam structure being characterized in that the reinforcing member includes a first reinforcing member disposed in an upper portion of the side beam and having a wave shape in a view in the vehicle width direction, and a second reinforcing member disposed below the first reinforcing member, the second reinforcing member is formed in a box shape that forms a closed section with the inner panel.

2. The side beam structure of a vehicle according to claim 1, characterized in that the side beam includes a joining flange formed by joining the inner panel and the outer panel, the first reinforcing member is joined to an upper wall of the outer panel and extends toward an inner side in the vehicle width direction across the joining flange.

3. The side beam structure of a vehicle according to claim 2, characterized in that the first reinforcing member and the second reinforcing member are arranged in line with a cross member provided in the floor portion in the vehicle width direction.

4. The side beam structure of a vehicle according to claim 2, characterized in that the second reinforcing member includes an extension portion that is sandwiched by the joining flange.

5. The side beam structure of a vehicle according to claim 3, characterized in that the second reinforcing member is joined to an inner wall of the inner panel and is formed in a U-shaped section that opens toward an inner side in the vehicle width direction in a view in an axial direction of the side beam.

6. The side beam structure of a vehicle according to claim 5, characterized in that the second reinforcing member extends farther toward an outer side in the vehicle width direction than the joining flange.

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