Lower longitudinal beam structure

Abstract

The invention provides a lower side member structure which does not require excessive heating to join parts in a hollow part of a lower side member, and can improve the rigidity of the lower side member compared with the prior art through a simple structure. A side sill structure (10) according to the present invention is characterized by comprising: a side sill (S) that extends in the front-rear direction of a vehicle on the outside of the vehicle in the width direction of the vehicle; a plate member (4) that partitions at least a part of the cross section of the side sill (S) in the vehicle width direction; a side sill structure (10) is provided with a lower side sill (S), a plate member (4) made of resin, and a reinforcing member (3) made of resin, which is disposed on the outer side of the plate member (4) in the vehicle width direction and is adhered to the lower side sill (S), the side sill structure (10) being provided with a plurality of protrusions (33) on one of the reinforcing member (3) and the plate member (4), and a plurality of inserted portions (41) into which the protrusions (33) are inserted on the other of the reinforcing member (3) and the plate member (4).

Description

Technical Field

[0001] The present invention relates to a side sill structure. Background Art

[0002] In recent years, traffic participants, especially vulnerable groups such as the elderly, the disabled, and children, have been actively promoted to enter sustainable transportation systems. With this goal in mind, the inventor of this application is committed to research and development to further improve traffic safety and convenience through development related to vehicle behavior stability, such as high performance of electric suspension devices. In order to achieve this goal, the inventor is committed to research and development to further improve traffic safety and convenience through development related to improving vehicle rigidity.

[0003] In the past, a lower longitudinal beam structure including a plate member and a pair of reinforcing members is known, wherein the plate member divides the closed cross section of the lower longitudinal beam in the vehicle width direction, and the pair of reinforcing members are arranged in the closed cross section of the lower longitudinal beam in a manner of sandwiching the plate member from both sides in the vehicle width direction (for example, see Patent Document 1). The reinforcing members of the lower longitudinal beam structure are roughly in the shape of a hat when observed in section, and have a bulging portion bonded to the plate member and a flange portion bonded to the inner wall surface of the lower longitudinal beam. According to such a lower longitudinal beam structure, the rigidity of the lower longitudinal beam is guaranteed by the plate member and the reinforcing member, so that the collapse stroke of the lower longitudinal beam during a side collision can be further ensured. As a result, the lower longitudinal beam can efficiently absorb energy during a side collision.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2010-143461 Summary of the invention

[0007] Problems to be solved by the invention

[0008] However, in the existing lower longitudinal beam structure (for example, see Patent Document 1), since the bonding portion where the reinforcing member and the plate member are bonded is located in the hollow closed cross-section of the lower longitudinal beam, the heat that promotes the curing of the adhesive is difficult to transfer to the bonding portion. Therefore, if the bonding force between the reinforcing member and the plate member is insufficient, sliding will occur between the reinforcing member and the plate member when the side collision load is input. Therefore, the existing lower longitudinal beam structure is sometimes unable to effectively transfer the load during a side collision and is unable to exert sufficient rigidity. In addition, in such a lower longitudinal beam structure, a heating process can also be additionally performed on the joint between the reinforcing member and the plate member, but this will cause a new problem of complicating the manufacturing process of the lower longitudinal beam structure.

[0009] The present invention aims to provide a side sill structure that can improve the rigidity of the side sill compared with the related art with a simple structure without requiring unnecessary heating for joining components within the closed cross section of the side sill, and further contribute to the development of a sustainable transportation system.

[0010] Means for solving problems

[0011] The present invention for achieving the above-mentioned problems is a lower side beam structure, comprising: a lower side beam, which extends in the vehicle front-rear direction on the outside of the vehicle in the vehicle width direction; a plate member, which divides at least a part of the cross-section of the lower side beam in the vehicle width direction; and a resin reinforcement member, which is arranged on the outside of the plate member in the vehicle width direction and bonded to the lower side beam, and the lower side beam structure is characterized in that a plurality of protrusions are provided on one of the reinforcement member and the plate member, and a plurality of inserted portions for the protrusions to be inserted are provided on the other.

[0012] Effects of the Invention

[0013] According to the present invention, it is possible to provide a side sill structure that does not require unnecessary heating for joining components within a closed cross section of the side sill and can improve the rigidity of the side sill with a simpler structure than in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a partially enlarged perspective view of a vehicle having a side sill structure according to an embodiment of the present invention.

[0015] Figure 2 It is an exploded perspective view of the side sill structure according to the embodiment of the present invention.

[0016] Figure 3 yes Figure 1 III-III sectional view.

[0017] Figure 4 yes Figure 3 A partial enlarged view of part IV.

[0018] Figure 5 yes Figure 4 VV cross-sectional view.

[0019] Figure 6 It is a partially enlarged perspective view showing the arrangement of a bulkhead in the side sill structure according to the embodiment of the present invention.

[0020] Figure 7 It is a partially enlarged cross-sectional view showing a modified example of the side sill structure.

[0021] Description of Reference Numerals

[0022] 3 Reinforcement

[0023] 4-Board Components

[0024] 5. Partition

[0025] 10 Lower longitudinal beam structure

[0026] 11 Upper wall of the lower longitudinal beam outer member (upper wall of the lower longitudinal beam)

[0027] 12 Outer wall of the lower longitudinal beam outer member (outer wall of the lower longitudinal beam)

[0028] 13 Upper wall of the lower longitudinal beam outer member (lower wall of the lower longitudinal beam)

[0029] 31 Outer convex part of reinforcement

[0030] 32 inner convex part of reinforcement

[0031] 32a Inner end of inner convex portion

[0032] 33 Protrusion

[0033] 33a cylinder

[0034] 35 Insertion

[0035] 41 Insertion

[0036] 41a The edge of the inserted portion of the plate member

[0037] 42 oblong through hole (long hole)

[0038] 43 Plate component tube

[0039] 44 protrusion

[0040] A Adhesive

[0041] L1 The length of the inserted portion in the longitudinal direction

[0042] L2 The length of the inserted portion in a direction perpendicular to the longitudinal direction

[0043] L3 Length of the protruding portion in the longitudinal direction

[0044] L4 Length of the protruding portion in a direction perpendicular to the longitudinal direction

[0045] S lower longitudinal beam DETAILED DESCRIPTION

[0046] Next, the method (implementation method) for implementing the lower side beam structure of the present invention will be described in detail with reference to appropriate drawings. It should be noted that the arrow directions of the front, rear, top, bottom, left, and right in the referenced drawings are consistent with the front, rear, top, bottom, left, and right directions of the vehicle. In addition, in the following description, the left and right directions of the vehicle are sometimes referred to as the vehicle width directions.

[0047] The main feature of the side sill structure of the present embodiment is that the partition member (plate member) and the resin reinforcement member (reinforcement member) in the closed cross section of the side sill are joined by fitting.

[0048] It should be noted that the side sill structure is arranged in a pair on the left and right sides of the vehicle, but has a mutually symmetrical structure. Therefore, only the side sill structure on the right side will be described below, and the detailed description of the side sill structure on the left side will be omitted.

[0049] First, before describing the side sill structure, the configuration of the vehicle will be described.

[0050] Figure 1 It is a partially enlarged perspective view of a vehicle having the side sill structure 10 according to the embodiment of the present invention.

[0051] like Figure 1 As shown, the side sill S constituting the side sill structure 10 is a vehicle frame member extending in the vehicle front-rear direction at the side of the lower portion of the vehicle.

[0052] The two end edges of the bottom plate 8a on the outside in the vehicle width direction are connected to the left and right side sills S (at Figure 1 In the figure, the left side lower beam is joined to the inner side in the vehicle width direction (not shown).

[0053] A floor tunnel 8b that is partially raised in the center in the vehicle width direction and extends in the front-rear direction is integrally formed on the floor panel 8a.

[0054] In addition, a floor cross member 8c extending in the vehicle width direction is disposed on the floor 8a. The floor cross member 8c has a hat shape opened downward when viewed in a cross section intersecting the extending direction. The flange F10 of the floor cross member 8c corresponding to the flange portion of the hat shape is joined to the floor 8a by spot welding or the like.

[0055] The vehicle width direction outer side end portion of the floor cross member 8c is welded to the vehicle width direction inner side of the side sill S. In addition, the vehicle width direction inner side end portion of the floor cross member 8c is welded to the side surface portion of the floor tunnel 8b.

[0056] It should be noted that the floor cross beams 8c of the present embodiment are assumed to be arranged in a pair on the floor plate 8a in a front-rear arrangement, but the number of floor cross beams 8c is not limited thereto.

[0057] like Figure 1 As shown in FIG. 1 , a center pillar 6 is provided on the side sill S so as to extend upward from the side sill S. As shown in FIG.

[0058] The center pillar 6 includes a pillar inner member 6a disposed on the inner side in the vehicle width direction, a pillar outer member 6b disposed on the outer side in the vehicle width direction, and a reinforcement member 7 described later (see Figure 2 ).

[0059] Figure 2 It is an exploded perspective view of the side sill structure 10 .

[0060] like Figure 2 As shown, the pillar inner member 6a is formed of a substantially plate-shaped body whose front-rear width gradually increases as it goes downward from the upper side.

[0061] The front and rear edges of the pillar inner member 6a are respectively Figure 1 ) and extends in the direction along the upper surface of the lower side beam S, forming a gentle curve that is recessed downward.

[0062] The two ends of the lower side of the pillar inner member 6a in the front-rear direction are sandwiched between the upper flange F6 of the side sill inner member 2 and the upper flange F4 of the side sill outer member 1 described later, and are joined by spot welding or the like in a three-piece overlapping manner. In addition, the pillar inner member 6a is joined to the flange F2 of the reinforcement member 7 by spot welding or the like.

[0063] The column outer member 6b is as follows Figure 2 As shown, it includes a base portion 6b1 having an L-shaped cross section arranged to cover the outer side in the vehicle width direction of the side sill S, and a main body portion 6b2 extending upward from the base portion 6b1 to form a closed cross section between the pillar inner member 6a.

[0064] The main body portion 6b2 has substantially the same planar shape as the pillar inner member 6a when viewed from the side of the vehicle.

[0065] The main body 6b2 has a hat shape when viewed in transverse section. The flange F1 of the pillar outer 6b overlapping the pillar inner 6a is joined to the pillar inner 6a by spot welding or the like, thereby forming a closed cross section inside the center pillar 6.

[0066] The reinforcement 7 is formed to correspond to the pillar outer 6b and is disposed in the closed cross section of the center pillar 6. The lower portion 7a of the reinforcement 7 is joined from the upper surface to the side surface of the side sill outer 1 described below by spot welding or the like.

[0067] The upper portion 7b of the reinforcement 7 has a hat shape when viewed in a transverse cross section. The upper portion 7b of the reinforcement 7 is joined to the vehicle width direction outer side surface of the pillar inner 6a at the flange F3 by spot welding or the like.

[0068] Next, the side sill structure 10 according to the present embodiment will be described.

[0069] like Figure 2 As shown, the side sill S constituting the side sill structure 10 includes a side sill inner member 2 , a side sill outer member 1 , a panel member 4 , a reinforcement member 3 , and a bulkhead 5 .

[0070] The lower side sill inner member 2 is arranged on the inner side in the vehicle width direction (see Figure 2 ), in the direction of length ( Figure 2 When observed in a cross-section intersecting the front-rear direction of the vehicle, the side sill inner member 2 is in the shape of a hat opened outward in the vehicle width direction. Specifically, the side sill inner member 2 is configured to include a bulging portion 24, an upper flange F6, and a lower flange F7.

[0071] The side sill outer member 1 is arranged on the vehicle width direction outer side of the side sill inner member 2 so as to sandwich the panel member 4 between the side sill inner member 2. Figure 2 The lower side beam outer member 1 is in the length direction ( Figure 2 When observed in a cross-section crossing the front-rear direction, the lower side sill outer member 1 is in the shape of a hat that opens inward in the vehicle width direction. Specifically, the lower side sill outer member 1 is configured to include a bulging portion 14, an upper flange F4, and a lower flange F5. Figure 2 In the figure, reference numeral B is a bracket for mounting the base portion 6b1 of the pillar outer member 6b to the side sill outer member 1. The bracket B has a shape extending in the direction of the side sill S ( Figure 2 The bracket B is mounted on the outer side surface of the side sill outer member 1 by spot welding or the like.

[0072] The plate member 4 is formed so that its plate surface faces the vehicle width direction and extends along the length direction of the lower side member S ( Figure 2 It is formed into a roughly flat plate with a long dimension extending in the front-to-back direction.

[0073] The panel member 4 is disposed directly below the center pillar 6 (pillar inner member 6 a ).

[0074] The plate member 4 has a plurality of oval through holes 42 that are long in the longitudinal direction (front-rear direction) of the plate member 4. Specifically, the oval through holes 42 that are arranged at equal intervals in the front-rear direction are arranged in three rows in a staggered manner in the up-down direction.

[0075] The through holes arranged in three rows in the middle of these oblong through holes 42 will be described in detail later and will serve as the protrusions 33 (see FIG. Figure 4 ) is inserted into the inserted portion 41 (see Figure 4 ).

[0076] The inserted portion 41 will be described in detail later together with the reinforcement member 3 .

[0077] The reinforcement member 3 is along the extension direction of the lower side beam S ( Figure 2 The reinforcement member 3 is a long resin member having a substantially W-shaped cross section and extending in the front-rear direction of the side sill.

[0078] Reinforcement 3 Figure 1 The III-III cross-sectional view is Figure 3 As shown, there are a pair of upper and lower outer convex parts 31 and an inner convex part 32 protruding toward the plate member 4 between the outer convex parts 31 .

[0079] The upper outer convex portion 31 is formed to be in close contact with the upper wall 11 and the outer wall 12 of the side sill outer 1 at the corner formed by the upper wall 11 and the outer wall 12. The upper outer convex portion 31 is bonded with the adhesive A to be integrated with the side sill outer 1 from the upper wall 11 to the outer wall 12.

[0080] The lower outer convex portion 31 is formed to be in close contact with the lower wall 13 and the outer wall 12 at the corner formed by the lower wall 13 and the outer wall 12 of the side sill outer 1. The lower outer convex portion 31 is bonded with the adhesive A and is integrated with the side sill outer 1 from the lower wall 13 to the outer wall 12.

[0081] As the adhesive A of the present embodiment, for example, structural adhesives such as epoxy resin-based adhesives and polyurethane-based adhesives are conceivable, but the adhesive is not limited thereto.

[0082] It should be noted that in Figure 3 In the figure, reference numeral 6b is a column outer member, reference numeral 7 is a reinforcement member, and reference numeral B is a bracket. Figure 1 and Figure 2 The side beam garnish G indicated by the imaginary line (two-dot chain line) covers the side beam S from the outside in the vehicle width direction in the length direction (for Figure 3 A long plate-like component configured in a manner roughly in the lower half (vertical direction of the paper surface).

[0083] Figure 4 yes Figure 3 A partial enlarged view of part IV.

[0084] like Figure 4 As shown, a protrusion 33 is formed on the inner convex portion 32 of the reinforcement member 3 .

[0085] The protrusion 33 extends toward the plate member 4 with the inner end portion 32 a facing the plate surface of the plate member 4 as a base end, and is inserted into the oblong through hole 42 of the plate member 4 .

[0086] The oblong through-hole 42 in the plate member 4 described here will be described in further detail.

[0087] like Figure 3 As shown in the figure, the oblong through hole 42 of the inserted portion 41 of the plate member 4 into which the protrusion 33 is inserted is formed so as to be located in the middle of the three rows of oblong through holes 42 arranged in the vertical direction. Specifically, the inserted portion 41 is located in the front-rear direction (for the vehicle width direction) at a position opposite to the inner protrusion 32. Figure 3The plate member 4 is formed in a manner such that a plurality of them are arranged in a direction (vertical direction of the paper surface).

[0088] like Figure 4 As shown, the inserted portion 41 of the plate member 4 has a cylindrical portion 43 extending and protruding from the edge 41a of the inserted portion 41, that is, the periphery of the oblong through hole 42 toward the vehicle width direction. The cylindrical portion 43 forms a collar portion into which the protruding portion 33 of the reinforcement member 3 is embedded. The oblong through hole 42 and the cylindrical portion 43 in the inserted portion 41 can be formed simultaneously by flanging the plate member 4 made of a steel plate.

[0089] Figure 5 yes Figure 4 VV cross-sectional view.

[0090] like Figure 5 As shown, the oblong through hole 42 as the inserted portion 41 of the plate member 4 is the lower side beam S (see Figure 1 ) is longer in the longitudinal direction (front-to-back direction) than in the vertical direction orthogonal to the longitudinal direction. Specifically, the oblong through hole 42 has a substantially racetrack-shaped inner periphery of a pair of front and rear arc portions 42a and a pair of upper and lower parallel straight portions 42b.

[0091] On the other hand, the protrusion 33 of the reinforcement member 3 inserted into the inserted portion 41 is as follows. Figure 5 As shown, it has a substantially racetrack shape that fits into the oblong through hole 42. That is, the protrusion is formed such that the length L3 in the longitudinal direction (front-rear direction) of the side sill S is longer than the length L4 in the vertical direction orthogonal to the longitudinal direction.

[0092] The oval through hole 42 and the protrusion 33 have a relationship of L1>L3 and L2>L4, and a small gap C exists between the oval through hole 42 and the protrusion 33. Although not shown in the figure, such a gap C may be formed by at least partially separating the oval through hole 42 and the protrusion 33.

[0093] The protrusion 33 of this embodiment (see Figure 4 ) is assumed to be composed of a solid body embedded in the cylindrical portion 43 of the inserted portion 41. Among them, the protrusion 33 can also be composed of Figure 4 The cylinder 33a indicated by the imaginary line (two-dot chain line) is formed.

[0094] The reinforcement member 3 is formed of resin. Specifically, the reinforcement member body 34 having a substantially W-shaped cross section is formed of fiber-reinforced resin, and the protrusion 33 is formed of fiber-free resin. Such a reinforcement member 3 can be manufactured by a known molding method such as RTM (Resin Transfer Molding).

[0095] Partition 5 Figure 2 As shown, it is disposed in the bulged portion 24 of the side sill inner 2 so as to be located on the inner side in the vehicle width direction relative to the panel member 4 .

[0096] The bulkhead 5 of this embodiment is oriented inward in the vehicle width direction when viewed in a transverse cross section (see FIG. Figure 1 left side) of the opened cap shape.

[0097] Partition 5 Figure 2 As shown, the flange F8 is formed at a position corresponding to the flange portion of the cap shape and the flange F9 is formed at the upper end and the lower end of the partition plate 5 (at Figure 2 The upper flange is not shown in the figure).

[0098] like Figure 3 As shown, the flange F8 is joined to the inner wall 22 of the side sill inner 2 by spot welding or the like. The upper flange F9 is joined to the upper wall 21 of the side sill inner 2 by spot welding or the like. The lower flange F9 is joined to the lower wall 23 of the side sill inner 2 by spot welding or the like.

[0099] Figure 6 It is a partially enlarged perspective view showing the arrangement of the partition plate 5 . Figure 6 2 is a perspective view showing a lower side member S viewed from the inside of the vehicle. Figure 6 In order to facilitate drawing, the middle column 6 is omitted (see Figure 1 ). In addition, Figure 6 In the figure, the partition 5 is represented by a hidden line (dashed line).

[0100] like Figure 6 As shown in FIG. 1 , the bulkhead 5 of the present embodiment is disposed in a manner that the bulkheads 5 correspond to the pair of floor cross members 8c described above, and are separated from each other in the longitudinal direction (front-rear direction) of the side sill S. Furthermore, the bulkhead 5 is formed so that the width is substantially the same as the front-rear width of the floor cross member 8c. That is, the position of the bulkhead 5 in the bulging portion 24 of the side sill inner member 2 is aligned with respect to the joint portion between the floor cross member 8c and the side sill inner member 2 in the front-rear direction.

[0101] According to the above-mentioned lower side beam structure 10, Figure 3 As shown, the side collision load Ld input to the side sill outer member 1 is efficiently transmitted to the pair of upper and lower outer convex portions 31 of the reinforcement member 3, the inner convex portion 32 of the reinforcement member 3, the panel member 4, the bulkhead 5, the side sill inner member 2 and the floor cross member 8c.

[0102] <Effects>

[0103] Hereinafter, the effects of the side sill structure 10 according to the present embodiment will be described in more detail.

[0104] In the side sill structure 10 of the present embodiment, the reinforcement member 3 includes a plurality of protruding portions 33 , and the panel member 4 includes a plurality of inserted portions 41 into which the protruding portions 33 are inserted.

[0105] According to the side sill structure 10, when a side collision load is input, sliding between the reinforcement member 3 and the panel member 4 can be prevented. The side collision load is more reliably transmitted from the reinforcement member 3 to the panel member 4. Thus, the side sill structure 10 can improve the rigidity of the side sill S and suppress deformation.

[0106] Furthermore, since the reinforcement member 3 and the panel member are connected by fitting, the side sill structure 10 can omit a heating step for curing an adhesive, unlike the conventional side sill structure 10 (see, for example, Patent Document 1), and thus the manufacturing process can be simplified.

[0107] In such a side sill structure 10 , the reinforcement member 3 is bonded to three surfaces of the outer wall, the upper wall, and the lower wall of the side sill outer 1 via its outer convex portion 31 , and is fitted to the panel member 4 via its inner convex portion 32 .

[0108] According to the side sill structure 10, the side collision load is more effectively transmitted from the reinforcement member 3 to the panel member 4. The rigidity and deformation suppression performance of the side sill S are further improved.

[0109] In addition, in such a side sill structure 10 , the inserted portion 41 of the panel member 4 is formed by the cylindrical portion 43 into which the protruding portion 33 of the reinforcement member 3 is fitted.

[0110] According to the side sill structure 10, the contact area between the protrusion 33 and the inserted portion 41 can be increased. Thus, when the side collision load is transmitted from the reinforcement member 3 to the panel member 4, the side sill structure 10 can more reliably maintain the fitting of the reinforcement member 3 and the panel member 4. The side collision load is more reliably transmitted from the reinforcement member 3 to the panel member 4.

[0111] In addition, in such a side sill structure 10 , the protrusion 33 is formed solid.

[0112] According to the side sill structure 10 , deformation of the protrusion 33 can be effectively suppressed when a side collision load is input, and the rigidity of the side sill S can be further improved.

[0113] In addition, in such a lower side sill structure 10, the cylinder 33a (see Figure 4 ) forms a protrusion 33.

[0114] According to the side sill structure 10 , by making the protruding portion 33 hollow, the contact area between the protruding portion 33 and the inserted portion 41 can be maintained, and the weight of the side sill structure 10 can be reduced.

[0115] Furthermore, according to the side sill structure 10 , the space formed between the reinforcement member 3 and the side sill outer member 1 and the space formed between the panel member 4 and the side sill inner member 2 can be communicated with each other via the tube 33 a .

[0116] In the side sill structure 10 , the reinforcement member main body 34 composed of the outer convex portion 31 and the inner convex portion 32 of the reinforcement member 3 is formed of a fiber-reinforced resin, and the protrusion 33 is formed of a fiber-free resin.

[0117] If it is assumed that both the reinforcement body 34 and the protrusion 33 are formed of a fiber-reinforced resin, the orientation of the reinforcement fibers in the reinforcement body 34 is disturbed near the protrusion 33 due to the reinforcement fibers continuously extending from the reinforcement body 34 to the protrusion 33. As a result, the rigidity of the reinforcement body 34 may be reduced.

[0118] On the other hand, since the protrusion 33 of the present embodiment is formed of a fiber-free resin, the orientation of the reinforcing fibers in the reinforcement body 34 is not disturbed.

[0119] According to the side sill structure 10 , it is possible to ensure good rigidity of the reinforcement member 3 and to fit the reinforcement member 3 and the panel member 4 .

[0120] In addition, in such a side sill structure 10, the protruding portion 33 and the oblong through hole 42 (long hole) as the inserted portion 41 are long in the longitudinal direction (front-rear direction) of the side sill S. In addition, the side sill structure 10 has a gap so that at least a portion of the protruding portion 33 and the oblong through hole 42 (long hole) are separated.

[0121] According to the side sill structure 10 , the protrusion 33 and the inner peripheral portion of the oblong through hole 42 (oblong hole) in the inserted portion 41 abut against each other in the vehicle vertical direction due to the moment generated in the side sill S during a side collision.

[0122] At this time, in the side sill structure 10 of the present embodiment, since the protrusion 33 and the oblong through hole 42 are long in the longitudinal direction (front-rear direction) of the side sill S, the contact area between the protrusion 33 and the oblong through hole 42 can be increased. Sliding between the reinforcement 3 and the plate member 4 can be more reliably prevented.

[0123] Furthermore, according to such a side sill structure 10, when the protrusion 33 of the reinforcement member 3 is inserted into the oblong through hole 42 (long hole) of the plate member 4, it is possible to absorb the relative positional deviation in the longitudinal direction of the oblong through hole 42 (long hole) and the protrusion 33. According to the side sill structure 10, the oblong through hole 42 (long hole) and the protrusion 33 can be more reliably fitted.

[0124] Furthermore, when the vehicle body is subjected to electrodeposition coating, the oblong through-holes 42 (oblong holes) formed in the panel member 4 also serve as passages for the electrodeposition coating liquid. According to such a side sill structure 10, the closed cross section of the side sill S can be subjected to electrodeposition coating uniformly.

[0125] In addition, the panel member 4 of such a side sill structure 10 is arranged right below the center pillar 6 (pillar inner member 6 a ).

[0126] According to such a side sill structure 10, the side collision load received by the reinforcement member 3 can be transmitted to the center pillar 6 via the panel member 4. The rigidity and deformation suppression performance of the side sill S are further improved.

[0127] The side sill S of such a side sill structure 10 includes a plurality of bulkheads 5 separated in the longitudinal direction (front-rear direction) of the side sill S in a cross section located inward in the vehicle width direction relative to the panel member 4 .

[0128] According to such a side sill structure 10 , the bulkhead 5 is deformed by the side collision load, so that energy absorption during a side collision can be performed more efficiently.

[0129] Furthermore, according to such a side sill structure 10 , the reinforcement member 3 on the outer side of the panel member 4 and the plurality of bulkheads 5 on the inner side of the panel member 4 cooperate with each other during a side collision, thereby efficiently dispersing the side collision load.

[0130] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be implemented in various forms.

[0131] In the above embodiment, the fitting structure in which the protrusion 33 is formed on the reinforcement member 3 and the inserted portion 41 of the protrusion 33 is formed on the plate member 4 is described, but the fitting structure between the reinforcement member 3 and the plate member 4 is not limited to this.

[0132] Figure 7 is a partially enlarged cross-sectional view showing a modified example of the side sill structure 10 of the above-mentioned embodiment, and Figure 4 correspond.

[0133] like Figure 7 As shown, the side sill structure 10 of the modified example has a tube portion 44a as a protrusion 44 on the plate member 4. The tube portion 44a is assumed to be formed by performing a burring process on the plate member 4.

[0134] Furthermore, the inner convex portion 32 of the reinforcement member 3 forms an inserted portion 35 by a through hole into which the cylindrical portion 44 a is inserted.

[0135] According to such a side sill structure 10, it is different from the side sill structure 10 having the protruding portion 33 (see Figure 4) is different from the reinforcement member 3, and the structure of the reinforcement member 3 is simplified. In addition, according to such a lower side sill structure 10, since the reinforcement member 3 formed of the reinforced fiber resin is partially engaged with the protrusion 44 of the plate member 4, the strength of the engaged structure is further improved.

[0136] The cross-sectional shape of the protrusion 33 and the planar shape of the inserted portion 41 (hole) in the embodiment are not particularly limited and may be long in the longitudinal direction (front-rear direction) of the side sill S, and may be, for example, a rectangular shape long in the front-rear direction.

[0137] In addition, the inserted portion 41 of the embodiment (see Figure 4 ) shows a long circular through hole 42 (see Figure 4 ) and the barrel 43 (see Figure 4 ) structure, the present invention does not exclude the insertion portion 41 that is composed only of the oblong through hole 42 by omitting the cylindrical portion 43.

Claims

1. A lower longitudinal beam structure, comprising: A lower side member extending in the vehicle front-rear direction at the outer side in the vehicle width direction of the vehicle; a panel member that partitions at least a portion of a cross section of the side sill in a vehicle width direction; and a resin reinforcement member, which is arranged on the outer side in the vehicle width direction of the panel member and is bonded to the side sill, The lower side sill structure is characterized in that: One of the reinforcement member and the plate member is provided with a plurality of protruding portions, and the other is provided with a plurality of inserted portions into which the protruding portions are inserted.

2. The side sill structure according to claim 1, characterized in that: The reinforcement comprises: an outer convex portion joined to the outer wall, the upper wall and the lower wall of the side sill by means of an adhesive; and an inner convex portion, which protrudes toward the plate member, The protruding portion or the inserted portion is formed at an inner end portion of the inner convex portion.

3. The side sill structure according to claim 2, characterized in that: The inserted portion is formed on the plate member so as to face the inner convex portion. The plate member includes a cylindrical portion extending from an edge of the inserted portion in a vehicle width direction.

4. The side sill structure according to claim 3, characterized in that: The protrusion is formed by a solid body embedded in the cylindrical portion.

5. The side sill structure according to claim 3, characterized in that: The protrusion is formed by a cylindrical body embedded in the cylindrical portion.

6. The side sill structure according to claim 2, characterized in that: The outer convex portion and the inner convex portion of the reinforcement member are formed of fiber-reinforced resin, The protrusion is formed of a fiber-free resin.

7. The side sill structure according to claim 1, characterized in that: The inserted portion is formed as a long hole having a length in the longitudinal direction of the lower side beam longer than a length in a direction perpendicular to the longitudinal direction, the outer shape of the protruding portion is formed so that the length in the longitudinal direction of the lower side beam is longer than a length in a direction perpendicular to the longitudinal direction, and at least a portion of the protruding portion is separated from the inserted portion.

8. The side sill structure according to claim 1, characterized in that: The plate member is disposed directly below a pillar extending upward from the side sill.

9. The side sill structure according to claim 1, characterized in that: The side sill includes a plurality of bulkheads that are separated from each other in a longitudinal direction of the side sill in a cross section located on the inner side in the vehicle width direction relative to the panel member.

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