CN210734286U

CN210734286U - Vehicle side structure

Info

Publication number: CN210734286U
Application number: CN201921614571.9U
Authority: CN
Inventors: 小盐直纪
Original assignee: Suzuki Motor Corp
Current assignee: Suzuki Motor Corp
Priority date: 2018-12-19
Filing date: 2019-09-26
Publication date: 2020-06-12
Anticipated expiration: 2029-09-26
Also published as: JP7444225B2; JP2023015307A; DE102019134007A1; DE102019134007A8; DE102019134007B4; FR3090505A1; JP2023009231A; FR3090505B1; JP7445223B2; JP7255164B2; JP2020097350A

Abstract

The utility model provides a vehicle lateral part structure can restrain the skew of the lower beam that arouses by vehicle width direction's load about the vehicle, makes the load to transfer such as longeron and restrain the entering amount of lower beam to the vehicle inboard. The vehicle side portion structure includes: a pair of left and right longitudinal beams provided on the lower surface of the floor; a pair of left and right side sills provided on the vehicle outer side of the side member; and an upper side cross member provided on an upper surface of the floor panel and connected to an upper side of the floor panel of the rocker, the rocker being composed of an inner panel and an outer panel, an impact absorbing member being provided inside the rocker, a vehicle outer side end portion of the floor panel having a rocker side joint portion, wherein the side member and the rocker are adjacent in a vehicle width direction, the side member is disposed at a position where at least a part overlaps the rocker when viewed from a vehicle side, the side member has a 1 st joint portion joined to the rocker, and the 1 st joint portion is disposed at a position where the 1 st joint portion overlaps an upper portion of the impact absorbing member on a vehicle inner side when viewed from the vehicle side.

Description

Vehicle side structure

Technical Field

The utility model relates to a vehicle lateral part structure.

Background

Vehicles such as electric vehicles and general automobiles are equipped with vehicle-mounted components such as a battery pack and a fuel tank, and the vehicle-mounted components are provided in a vehicle lower portion such as below a vehicle body floor in view of layout. Therefore, in vehicles such as electric vehicles, measures are required to prevent vehicle-mounted components from being damaged by an impact load particularly at the time of a vehicle side collision.

Therefore, in a conventional vehicle, the following structure may be adopted: a structure is known in which an impact absorbing member is additionally provided inside a rocker on the vehicle width direction outer side, a side member joined to a floor is provided at a position on the vehicle inner side of the rocker, and a battery frame (cross member) joined to the floor via a bushing and a bracket is provided, whereby it is possible to prevent the battery frame supporting a battery pack or the like from being detached from the floor at the time of a side impact (see, for example, patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2013-60160

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

However, in the above-described conventional vehicle side portion structure, since the side member and the bracket are joined to the floor located on the vehicle inner side of the rocker, there is a high-rigidity portion on the vehicle inner side of the rocker, and therefore, the rocker is displaced in the vehicle vertical direction about the high-rigidity portion as an axis with respect to a load in the vehicle width direction, and there is a possibility that the load transmission is insufficient and the amount of entry of the rocker into the vehicle inner side increases.

The present invention has been made in view of such circumstances, and an object thereof is to provide a vehicle side portion structure with which it is possible to suppress a deflection of a rocker in the vehicle vertical direction caused by a load in the vehicle width direction applied at the time of a side impact, to efficiently transmit the load in the vehicle width direction to a side member and a cross member on the floor upper side, and to improve the absorption performance of the rocker against the load in the vehicle width direction and to suppress the amount of entrance of the rocker into the vehicle interior.

Means for solving the problems

In order to solve the problems of the prior art described above, the present invention provides a vehicle side portion structure including: a pair of left and right side members provided on a vehicle width direction side portion of a lower surface of the floor panel and extending in a vehicle front-rear direction; a pair of left and right side sills provided on the vehicle width direction outer sides of the side sills and extending in the vehicle front-rear direction; and a cross member on the upper side of the floor, which is provided on the upper surface of the floor, extends in the vehicle width direction, and connects the pair of left and right side sills, the rocker is composed of a rocker inner panel on the vehicle inner side and a rocker outer panel on the vehicle outer side, an impact absorbing member is provided inside the rocker, the vehicle outer side end portion of the floor panel has a rocker side engaging portion that engages with the rocker, the vehicle side portion construction is characterized in that the side member and the rocker member are disposed adjacent to each other in the vehicle width direction, the side member is disposed at a position at least partially overlapping the rocker when viewed from the side of the vehicle, and has a 1 st engagement portion that engages with the rocker, the 1 st joint portion is disposed at a position overlapping with an upper portion of the impact absorbing member on the vehicle inner side when viewed from the side of the vehicle.

In the above vehicle side portion structure, it is preferable that the cross member on the upper side of the floor panel includes an inclined portion that extends from the vehicle inner side toward the vehicle outer side in the vehicle width direction and is inclined toward the vehicle lower side, the inclined portion having a 2 nd joint portion that is joined to the rocker inner panel at a vehicle width direction outer side end portion, the 2 nd joint portion being located on an upper surface of the rocker inner panel.

In the above vehicle side portion structure, it is preferable that the side member has an inner wall and an outer wall, a reinforcement joining the inner wall and the outer wall is provided inside the side member, an upper closed cross-sectional portion configured by combining the reinforcement and the floor is provided on an upper side of the reinforcement, and the upper closed cross-sectional portion is disposed at a position overlapping with the impact absorbing member when viewed from a vehicle side.

In the above vehicle side portion structure, it is preferable that a cross member under the floor, which extends in the vehicle width direction and connects the pair of left and right side members, is provided under the pair of left and right side members, and the cross member under the floor is fixed to the side members by a fixing member joined to the reinforcement.

In the vehicle side portion structure, it is preferable that the floor panel has an inclined surface that extends from a vehicle inner side toward a vehicle outer side in a vehicle width direction and is inclined downward toward the vehicle, an in-vehicle member is mounted below the inclined surface, a vehicle outer side end portion of a floor reinforcement member is joined to the inclined surface of the floor panel, the floor reinforcement member has a side member side joining portion that is joined to the side member, and a vehicle inner side end portion of the floor reinforcement member is joined to the floor panel at a position closer to the vehicle inner side than the inclined surface.

In the above vehicle side portion structure, it is preferable that the impact absorbing member has: an inner member and an outer member each having a hat-shaped cross section, the openings of the hat-shaped cross sections being arranged to face each other, and a joining position of an upper end portion of the inner member and an upper end portion of the outer member and a joining position of a lower end portion of the inner member and a lower end portion of the outer member being substantially the same in a vehicle width direction; and a center member that extends linearly in the vehicle vertical direction and is joined in a state in which: the upper intermediate portion of the center member is sandwiched between the upper end portion of the inner member and the upper end portion of the outer member, the lower intermediate portion of the center member is sandwiched between the lower end portion of the inner member and the lower end portion of the outer member, and the upper portion and the lower portion of the center member are sandwiched between the rocker inner panel and the rocker outer panel.

Effect of the utility model

As described above, the vehicle side portion structure of the present invention includes: a pair of left and right side members provided on a vehicle width direction side portion of a lower surface of the floor panel and extending in a vehicle front-rear direction; a pair of left and right side sills provided on the vehicle width direction outer sides of the side sills and extending in the vehicle front-rear direction; and a floor upper side cross member provided on an upper surface of the floor, the floor upper side cross member extending in a vehicle width direction and connecting a pair of left and right side sills, the side sill being composed of a side sill inner panel on a vehicle inner side and a side sill outer panel on a vehicle outer side, an impact absorbing member being provided inside the side sill, a vehicle outer side end portion of the floor having a side sill side joint portion joined to the side sill, the side member and the side sill being disposed adjacent to each other in the vehicle width direction, the side member being disposed at a position where at least a part overlaps the side sill when viewed from a vehicle side, the side member having a 1 st joint portion joined to the side sill, the 1 st joint portion being disposed at a position where it overlaps an upper portion on the vehicle inner side of the impact absorbing member when viewed from the vehicle side.

Therefore, in the vehicle side portion structure of the present invention, since the side member and the rocker are joined in the adjacent state to form the structure in which the rocker is supported by the side member, the absorption performance of the rocker against the load from the vehicle width direction can be improved. In addition, in the vehicle side portion structure of the present invention, since the 1 st joint portion of the side member is located on the upper side in the vehicle vertical direction than the floor, it is possible to suppress the rocker from shifting in the vehicle vertical direction with respect to the side member and entering the vehicle inside when a load from the vehicle width direction is transmitted.

Drawings

Fig. 1 is a perspective view of a floor, a rocker, and an upper cross member on the upper side of the floor in a vehicle side portion structure according to an embodiment of the present invention, as viewed from above a vehicle.

Fig. 2 is a sectional view taken along line a-a in fig. 1.

Fig. 3 is a sectional perspective view of the rocker in fig. 1 and the upper cross member on the upper side of the floor panel and its peripheral portion as viewed from above the vehicle.

Fig. 4 is a perspective view of the floor panel of fig. 1 as viewed from below the vehicle.

Description of the reference numerals

1. A floor; 1a, a vehicle outer side end; 2. a stringer; 2a, lower surface; 2b, an inner side wall; 2c, an outer side wall; 2d, a through hole; 3. a lower edge beam; 4. an upper cross member on the upper side of the floor; 5. an impact absorbing member; 6. a lower side cross member of the lower side of the floor; 7. a fixing member; 7a, an upper part; 7b, lower part; 7c, an intermediate portion; 8. a bracket member; 9. a floor reinforcement member; 9a, a vehicle outer side end portion; 9b, vehicle inner side end portion; 10. a rocker-side joint portion; 12. an inclined surface of the floor; 21. a reinforcement; 21a, a mounting surface; 21b, 21c, side faces; 21d, mounting holes; 31. a rocker inner panel; 31a, an upper end portion; 31b, lower end portion; 31c, an upper surface; 32. a rocker outer panel; 32a, an upper end portion; 32b, lower end portion; 40. flange part of upper beam on the upper side of floor; 41. a main body portion of an upper cross member on an upper side of the floor; 42. an inclined part of the upper side beam on the upper side of the floor; 42a, a vehicle width direction outer side end portion; 51. an inner member of the impact absorbing member; 51a, an upper end; 51b, lower end; 52. an outer member of the impact absorbing member; 52a, an upper end portion; 52b, lower end portion; 53. a central member; 53a, an upper intermediate portion; 53b, lower intermediate portion; 53c, upper; 53d, lower part; 61. a main body portion of a lower cross member on a lower side of the floor; 61c, a through hole; 62. a flange portion of a lower side beam on the lower side of the floor; 62a, a through hole; 63. a bending section; 71. fastening a bolt; 85. a through hole of the bracket member; 91. a side member-side joint portion of the floor reinforcement member; 100. an on-vehicle component; s1, upper closed cross-section portion; w1, No. 1 joint; w2, No. 2 joint.

Detailed Description

The present invention will be described in detail below based on the illustrated embodiments.

In the drawings, the arrow Fr direction is directed toward the vehicle front, and the arrow O direction is directed toward the vehicle width direction outer side. The arrow X direction indicates the vehicle width direction, and the arrow Y direction indicates the vehicle front-rear direction.

Fig. 1 to 4 show a vehicle side portion structure according to an embodiment of the present invention. As shown in fig. 1 to 4, the vehicle side portion structure of the present embodiment includes: a pair of left and right side members 2 provided at vehicle width direction side portions of a lower surface of the floor panel 1 that is expanded in the vehicle width direction and the vehicle front-rear direction, and extending in the vehicle front-rear direction; a pair of left and right rocker beams 3 provided on the vehicle width direction outer sides of the side members 2 and extending in the vehicle front-rear direction; and an upper side cross member 4 provided on the upper surface of the floor panel 1, the upper side cross member 4 extending in the vehicle width direction and connecting the pair of left and right side sills 3.

As shown in fig. 2 and 3, the rocker 3 of the present embodiment is configured to have a closed cross-sectional structure by a rocker inner panel 31 on the vehicle inner side and a rocker outer panel 32 on the vehicle outer side, the rocker inner panel 31 and the rocker outer panel 32 having a hat-shaped cross-section in which openings face each other, and a position at which an upper end 31a of the rocker inner panel 31 and an upper end 32a of the rocker outer panel 32 are joined together is substantially the same as a position at which a lower end 31b of the rocker inner panel 31 and a lower end 32b of the rocker outer panel 32 are joined together in the vehicle width direction. Further, an impact absorbing member 5 that absorbs a load in the vehicle width direction applied to the rocker outer panel 32 and the like is provided inside the rocker 3. The vehicle outer side end 1a of the floor panel 1 has a rocker side joint 10 joined to the rocker inner panel 31 of the rocker 3. In addition, since the vehicle outer side end portion 1a of the floor panel 1 and the rocker inner panel 31 are joined, the floor panel 1 is cut away at the joint portion with the upper side cross member 4 on the upper side of the floor panel.

In the vehicle side portion structure of the present embodiment, as shown in fig. 2 and 3, the side member 2 and the rocker 3 are disposed adjacent to each other in the vehicle width direction, and the side member 2 is disposed at a position at least partially overlapping the rocker 3 when viewed from the side of the vehicle. The side member 2 in the vehicle side portion structure of the present embodiment is provided at a position lower than the height position of the rocker 3 in the vehicle vertical direction. The side member 2 has a 1 st joint portion W1 joined to the side surface of the rocker inner panel 31 of the rocker 3, and the 1 st joint portion W1 is disposed at a position overlapping the vehicle interior upper portion of the impact absorbing member 5 when viewed from the vehicle side. That is, the side member 2 and the side sill 3 are joined to each other at the 1 st joint portion W1. Here, the 1 st joint portion W1 is disposed along the vehicle front-rear direction to join the side member 2 and the side sill 3.

Therefore, the rocker 3 is configured to be supported by the side member 2 against a load from the vehicle width direction outer side, and the load absorption of the rocker 3 for absorbing the load from the vehicle width direction outer side can be improved. The 1 st joint portion W1 may be disposed above the vehicle outer side end portion 1a of the floor panel 1 in the vehicle.

As shown in fig. 1 to 3, the upper side cross member 4 on the upper side of the floor in the present embodiment is formed in a hat shape in cross section with an opening portion disposed downward, and flange portions 40 protruding in the vehicle longitudinal direction are joined to the upper surface of the floor panel 1 and the side surfaces of the rocker inner panel 31. In addition, the upper side cross member 4 on the floor upper side includes: a main body portion 41 that is located on the vehicle interior side and extends along the center surface 11 of the floor panel 1; and an inclined portion 42 that extends obliquely toward the vehicle lower side from the vehicle inner side toward the vehicle outer side in the vehicle width direction. The inclined portion 42 has a 2 nd joint portion W2 joined to the rocker inner panel 31 of the rocker 3 at a vehicle width direction outer side end portion 42a extending in the horizontal direction, the 2 nd joint portion W2 being located on the upper surface 31c of the rocker inner panel 31.

Thus, the 2 nd joint portion W2 is joined to the rocker inner panel 31 from the vehicle upper side, and the 1 st joint portion W1 is joined to the rocker inner panel 31 from the vehicle width direction inner side, and the joint portions are arranged so as to intersect with each other, so that the rocker 3 is configured to be able to be restrained from moving due to an impact load from the vehicle width direction outer side. Further, a seat bracket 43 is attached to an upper portion of the upper cross member 4 on the floor upper side.

As shown in fig. 2 and 3, the side member 2 of the present embodiment has a planar lower surface 2a, and an inner side wall 2b and an outer side wall 2c that are located on the inner side and the outer side in the vehicle width direction of the lower surface 2a and extend upward of the vehicle, and is formed in a substantially U-shaped cross section. A reinforcement 21 is provided inside the side member 2, and the reinforcement 21 is joined to the inner wall 2b and the outer wall 2c of the side member 2 to connect the inner wall 2b and the outer wall 2 c. An upper closed cross-sectional portion S1 formed by combining the reinforcement 21 with the floor panel 1 is provided on the upper side of the reinforcement 21, and the upper closed cross-sectional portion S1 is disposed at a position overlapping the impact absorbing member 5 in the rocker 3 when viewed from the side of the vehicle. With this arrangement, the upper closed cross-section portion S1 supports the impact absorbing member 5 against a load from the vehicle width direction outer side, and has a structure that promotes load absorbing performance.

On the other hand, in the vehicle side portion structure of the present embodiment, as shown in fig. 2 and 3, a lower floor cross member 6 that extends in the vehicle width direction and connects the pair of left and right side members 2 is provided below the pair of left and right side members 2, and the lower floor cross member 6 is fixed to the side members 2 by a cylindrical fixing member 7 that is joined to a reinforcement 21 in the side members 2. That is, the side member 2 is supported by the lower cross member 6 on the floor lower side via the reinforcement 21 and the fixing member 7.

Therefore, the floor lower side cross member 6 has: a main body portion 61 having a closed cross-sectional structure, and an on-vehicle component, which will be described later, is fixed to the main body portion 61 at a fixing portion D; and a flange portion 62 fixed to the side member 2. The body portion 61 is located at a middle portion of the lower cross member 6 in the vehicle width direction, and has a pair of upper and

lower beam bodies

61a, 61b arranged at an interval in the upper and lower directions. The flange portion 62 is located at the outer side end portion in the vehicle width direction of the lower cross member 6, and is joined to the pair of upper and

lower beam bodies

61a, 61b so as to close the vehicle width direction outer side opening end of the body portion 61 when viewed from the vehicle rear.

Further, a female screw is formed on the inner peripheral surface of the fixing member 7, and the female screw is threadably engaged with a male screw of a rod portion of a fastening bolt 71 for fastening the side member 2 and the lower cross member 6. The upper portion 7a of the fixing member 7 protrudes above the mounting surface 21a through the mounting hole 21d, and is joined to the reinforcement 21 in a state where the intermediate portion 7c abuts against the lower surface of the mounting surface 21 a. The lower portion 7b of the fixing member 7 is engaged over the lower surface 2a of the side member 2.

The reinforcing material 21 further includes: a mounting surface 21a located above the lower surface 2a of the side member 2 and spaced apart from the lower surface 2 a; and side surfaces 21b and 21c, the side surfaces 21b and 21c being joined to the left and

right side walls

2b and 2c of the side member 2, and a mounting hole 21d into which the upper portion of the fixing member 7 is inserted being provided in the mounting surface 21 a. Through

holes

2d, 61c, 62a through which the rod portions of the fastening bolts 71 are inserted are provided in the lower surface 2a of the side member 2 and the body portion 61 and the flange portion 62 of the lower cross member 6, corresponding to a through hole 85 of the bracket member 8 and a mounting hole 21d of the reinforcement 21, which will be described later.

Accordingly, when an external load is input to the reinforcement 21 in the side member 2, the external load is transmitted from the fixing member 7 to the lower cross member 6 on the floor lower side, and the transmission and distribution of the load are promoted.

In the vehicle side portion structure of the present embodiment, as shown in fig. 2 and 3, the side member 2 and the flange portion 62 of the lower cross member 6 are fixed together by the bracket member 8, and the bracket member 8 and the lower cross member 6 are combined to form the lower closed cross-section portion S2 capable of improving the rigidity around the fixing portion of the bracket member 8. The lower closed cross-section portion S2 is disposed at a position across the boundary region R between the body portion 61 and the flange portion 62 of the lower cross member 6 in the vehicle width direction, and the position of the stress concentration portion of the fixing portion between the side member 2 and the lower cross member 6 is shifted by this arrangement. The bracket member 8 also has a beam-side fixing portion 81 fixed to the body portion 61 of the lower cross member 6 at a position on the vehicle width direction inner side.

The bracket member 8 of the present embodiment is formed in a quadrangular shape in a plan view of the vehicle, and includes: a side beam fixing portion 82 fixed to the lower surface 2a of the side beam 2; and an inclined surface 83 extending from the vehicle width direction inner end portion of the side member side fixing portion 82 to the side member side fixing portion 81 and inclined downward toward the vehicle width direction inner side. Further, the side member-side fixing portion 82 is provided with a through hole 85 through which the rod portion of the fastening bolt 71 is inserted.

Thus, the load from the side member 2 is smoothly transmitted to the lower cross member 6 via the side member fixing portion 82 and the inclined surface 83 of the bracket member 8, and local load concentration can be suppressed.

In the vehicle side portion structure of the present embodiment, as shown in fig. 2 and 3, the lower cross member 6 on the floor lower side has a bent portion 63 that is bent inward in the vehicle width direction in the boundary region R between the main body portion 61 and the flange portion 62. That is, the bent portion 63 is formed in a substantially S-shape that is laterally bent inward in the vehicle width direction from the flange portion 62 of the lower cross member 6 located on the upper side toward the lower beam body 61b of the main body portion 61, and the peripheral portion of the bent portion 63 is joined to the lower beam body 61b of the main body portion 61. By the curved portion 63 having such a shape, a change in the cross-sectional area of the total closed cross-sectional portion obtained by adding the closed cross-sectional portion S2 on the bracket member 8 side and the closed cross-sectional portion of the main body portion 61 of the lower cross member 6 can be reduced, and a structure capable of maintaining the area of the total closed cross-sectional portion can be obtained.

Further, the bent portion 63 of the lower cross member 6 has rigidity against a load in the vehicle vertical direction. Therefore, the bent portion 63 is disposed at a position overlapping the inclined surface 83 of the bracket member 8 in the vehicle width direction. Accordingly, when the load is concentrated on the portion where the bent portion 63 and the main body portion 61 are joined to each other and deformed, the bent portion 63 is disposed within the range of the inclined surface 83, and therefore, the load is transmitted to the inclined surface 83 and the load is prevented from being concentrated on the bent portion 63.

As shown in fig. 2 and 3, a cylindrical fixing auxiliary member 72 for assisting the fixing between the side member 2 and the lower cross member 6 is provided between the bracket member 8 and the flange portion 62 of the lower cross member 6 in the present embodiment. The fixing assistance member 72 has a vertical length such that the fixing assistance member 72 can be disposed between the side member-side fixing portion 82 of the bracket member 8 and the upper side member body 61a of the main body portion 61 of the lower cross member 6 in the vertical direction and the upper and lower surfaces of the cylindrical body can be in contact with the side member-side fixing portion 82 and the upper side member body 61 a. In addition, the fixing assistance member 72 has an inner diameter through which the fastening bolt 71 can pass. The fixing member 7 and the fixing auxiliary member 72 are fastened together by the fastening bolt 71, and have a structure capable of utilizing the rigidity in the vehicle width direction of the fastening bolt 71. Thereby, the load input from the side member 2 is transmitted to the lower cross member 6 via the fixing assistance member 72, and the dispersion of the load is further promoted.

As shown in fig. 1 to 4, the floor panel 1 in the vehicle side portion structure of the present embodiment has a center surface 11 bulging toward the vehicle upper side (vehicle compartment inner side), and the center surface 11 is formed in a quadrangular shape when viewed from the vehicle upper side of the vehicle compartment inner side. The floor panel 1 of the present embodiment has an inclined surface 12 that is inclined downward in the vehicle width direction from a center surface 11 on the vehicle inner side toward the vehicle outer side, and a vehicle-mounted member 100 such as a battery pack or a fuel tank is mounted below the inclined surface 12. On the other hand, as shown in fig. 2 to 4, the vehicle outer side end 9a of the floor reinforcement member 9 is joined to the inclined surface 12 of the floor panel 1 with the inner side wall 2b of the side member 2 interposed therebetween, the floor reinforcement member 9 has a side member side joining portion 91 joined to the side member 2, and the vehicle inner side end 9b of the floor reinforcement member 9 is joined to the floor panel 1 at a position (center surface 11) on the vehicle inner side of the inclined surface 12. Therefore, the floor reinforcement member 9 extends in the vehicle width direction and is disposed along the center surface 11 and the inclined surface 12 of the floor panel 1.

That is, the vehicle side portion structure of the present embodiment is configured such that, when a load from the vehicle width direction outer side is input to the side member 2, deformation of the inclined surface 12 of the floor panel 1 to the vehicle inner side is suppressed by the floor reinforcing member 9, and the load can be smoothly transmitted to the side member 2.

On the other hand, as shown in fig. 2 and 3, the impact absorbing member 5 of the present embodiment includes: an inner member 51 and an outer member 52, the inner member 51 and the outer member 52 having a hat-shaped cross section arranged with their open portions facing each other, the position where the upper end portion 51a of the inner member 51 and the upper end portion 52a of the outer member 52 are joined together being substantially the same as the position where the lower end portion 51b of the inner member 51 and the lower end portion 52b of the outer member 52 are joined together in the vehicle width direction; and a center member 53 that extends straight in the vehicle vertical direction and is joined in the following state: the upper intermediate portion 53a of the center member 53 is sandwiched between the upper end portion 51a of the inner member 51 and the upper end portion 52a of the outer member 52, the lower intermediate portion 53b of the center member 53 is sandwiched between the lower end portion 51b of the inner member 51 and the lower end portion 52b of the outer member 52, the upper portion 53c of the center member 53 is sandwiched between the upper end portion 31a of the rocker inner panel 31 and the upper end portion 32a of the rocker outer panel 32, and the lower portion 53d of the center member 53 is sandwiched between the lower end portion 31b of the rocker inner panel 31 and the lower end portion 32b of the rocker outer panel 32.

Therefore, when a load in the vehicle width direction is input from the rocker outer panel 32 of the rocker 3 to the impact absorbing member 5, the inner member 51 and the outer member 52 are deformed substantially equally toward the vehicle interior side with the center member 53 interposed therebetween, and the impact absorbing member 5 having high load absorbing performance is provided inside the rocker 3.

As such, in the vehicle side portion structure of the embodiment of the present invention, there is included: a pair of left and right side members 2 provided on the vehicle width direction side portions of the lower surface of the floor panel 1 and extending in the vehicle front-rear direction; a pair of left and right rocker beams 3 provided on the vehicle width direction outer sides of the side members 2 and extending in the vehicle front-rear direction; and an upper side cross member 4 provided on the upper surface of the floor panel 1 and extending in the vehicle width direction to connect the pair of left and right side sills 3. The rocker 3 is composed of a rocker inner panel 31 on the vehicle inner side and a rocker outer panel 32 on the vehicle outer side, the impact absorbing member 5 is provided inside the rocker 3, and the vehicle outer side end 1a of the floor panel 1 has a rocker-side joint 10 joined to the rocker 3. The side member 2 and the rocker 3 are disposed adjacent to each other in the vehicle width direction, and the side member 2 is disposed at a position at least partially overlapping the rocker 3 when viewed from the side of the vehicle. The side member 2 further includes a 1 st joint portion W1, the 1 st joint portion W1 being joined to the rocker 3 and arranged to extend in the vehicle front-rear direction, and the 1 st joint portion W1 being arranged at a position having a portion overlapping with the vehicle interior upper portion of the impact absorbing member 5 when viewed from the vehicle side.

Therefore, the vehicle side portion structure of the present invention is configured such that the side member 2 and the rocker 3 are joined in a state in which they are adjacent to each other in the vehicle width direction, whereby the rocker 3 on the vehicle outer side is supported by the side member 2 on the vehicle inner side, and therefore, the absorption performance of the rocker 3 against a load from the vehicle width direction can be improved. In the vehicle side portion structure of the present invention, since the 1 st joint portion W1 of the side member 2 is located above the floor 1 in the vehicle vertical direction, it is possible to suppress the side sill 3 from shifting in the vehicle vertical direction with respect to the side member 2 when a load is input from the vehicle width direction, and it is possible to efficiently transmit the load to the side member 2 and the upper side cross member 4 on the upper side of the floor, and it is possible to reduce the amount of entrance of the side sill 3 into the vehicle interior.

In addition, in the vehicle side portion structure of the present embodiment, the upper side cross member 4 on the upper side of the floor panel includes the inclined portion 42, the inclined portion 42 extends obliquely toward the vehicle lower side in the vehicle width direction from the vehicle inner side toward the vehicle outer side, the inclined portion 42 has the 2 nd joint portion W2 joined to the rocker inner panel 31 at the vehicle width direction outer side end portion 42a, and the 2 nd joint portion W2 is located on the upper surface 31c of the rocker inner panel 31.

Therefore, in the vehicle side portion structure of the present embodiment, the 2 nd joint portion W2 of the upper side cross member 4 on the upper side of the floor is joined from the vehicle upper side to the upper surface 31c of the rocker inner panel 31, the 1 st joint portion W1 of the side member 2 is joined from the vehicle width direction inner side to the side surface of the rocker inner panel 31, and the two joint portions W1, W2 are disposed at positions that intersect each other, so that it is possible to suppress movement of the rocker 3 caused by an impact load from the vehicle width direction outer side, and it is possible to further improve the impact load absorption effect of the rocker 3.

In the vehicle side structure of the present embodiment, the side member 2 has the inner side wall 2b and the outer side wall 2c, and the reinforcement 21 joined to the inner side wall 2b and the outer side wall 2c is provided inside the side member 2. An upper closed cross-sectional portion S1 configured by the reinforcement 21 being combined with the floor panel 1 is provided on the upper side of the reinforcement 21, and the upper closed cross-sectional portion S1 is disposed at a position overlapping the impact absorbing member 5 when viewed from the side of the vehicle.

Thus, according to the vehicle side portion structure of the present embodiment, the upper closed cross-sectional portion S1 can support the impact absorbing member 5 against a load from the vehicle width direction outer side, and the load absorbing performance of the impact absorbing member 5 can be further promoted.

In the vehicle side portion structure of the present embodiment, an under-floor lower cross member 6 is provided below the pair of left and right side members 2, the under-floor lower cross member 6 extends in the vehicle width direction and connects the pair of left and right side members 2, and the under-floor lower cross member 6 is fixed to the side members 2 by a fixing member 7 joined to the reinforcement 21.

Therefore, in the vehicle side portion structure of the present embodiment, when an impact load at the time of a side impact is input to the reinforcement 21 in the side member 2, the impact load is transmitted from the fixing member 7 to the lower cross member 6 on the underfloor side, so that the load transmission performance can be promoted to improve the load dispersion effect, and the side member 2 can be supported more firmly than in the conventional vehicle side portion structure.

In the vehicle side portion structure of the present embodiment, the floor panel 1 has the inclined surface 12 inclined downward in the vehicle width direction from the vehicle inside toward the vehicle outside, and the vehicle-mounted member 100 is mounted below the inclined surface 12. On the other hand, the vehicle outer side end portion 9a of the floor reinforcement member 9 is joined to the inclined surface 12 of the floor panel 1, the floor reinforcement member 9 has a side member side joining portion 91 joined to the side member 2, and the vehicle inner side end portion 9b of the floor reinforcement member 9 is joined to the floor panel 1 at a position further toward the vehicle inner side than the inclined surface 12.

Therefore, in the vehicle side portion structure of the present embodiment, when a load in the vehicle width direction is input to the side member 2, the deformation of the inclined surface 12 of the floor panel 1 to the vehicle inner side is suppressed by the floor reinforcing member 9, and therefore the load in the vehicle width direction is easily transmitted to the side member 2, and the transmission of the load in the vehicle width direction can be promoted.

In addition, in the vehicle side portion structure of the present embodiment, the impact absorbing member 5 has: an inner member 51 and an outer member 52, the inner member 51 and the outer member 52 having a hat-shaped cross section arranged with their open portions facing each other, the position where the upper end portion 51a of the inner member 51 and the upper end portion 52a of the outer member 52 are joined together being substantially the same as the position where the lower end portion 51b of the inner member 51 and the lower end portion 52b of the outer member 52 are joined together in the vehicle width direction; and a center member 53 that extends straight in the vehicle vertical direction and is joined in the following state: the upper intermediate portion 53a of the center member 53 is sandwiched between the upper end portion 51a of the inner member 51 and the upper end portion 52a of the outer member 52, the lower intermediate portion 53b of the center member 53 is sandwiched between the lower end portion 51b of the inner member 51 and the lower end portion 52b of the outer member 52, and the upper portion 53c and the lower portion 53d of the center member 53 are sandwiched between the rocker inner panel 31 and the rocker outer panel 32.

Therefore, according to the vehicle side portion structure of the present embodiment, when a load in the vehicle width direction is input from the rocker outer panel 32 of the rocker 3 to the impact absorbing member 5, the inner member 51 and the outer member 52 sandwiching the center member 53 can be deformed substantially uniformly toward the vehicle inner side, and the load absorbing performance of the impact absorbing member 5 can be further improved.

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

Claims

1. A vehicle side portion construction comprising: a pair of left and right side members provided on a vehicle width direction side portion of a lower surface of the floor panel and extending in a vehicle front-rear direction; a pair of left and right side sills provided on the vehicle width direction outer sides of the side sills and extending in the vehicle front-rear direction; and a cross member on the upper side of the floor, which is provided on the upper surface of the floor, extends in the vehicle width direction, and connects the pair of left and right side sills,

the rocker is composed of a rocker inner panel on the vehicle inner side and a rocker outer panel on the vehicle outer side, an impact absorbing member is provided inside the rocker,

the vehicle outer side end portion of the floor panel has a rocker side engaging portion that engages with the rocker,

the vehicle side portion construction is characterized in that,

the side member and the side sill are disposed adjacent to each other in a vehicle width direction, the side member is disposed at a position where at least a part overlaps the side sill when viewed from a side of the vehicle,

the side member has a 1 st joint portion joined to the side sill, and the 1 st joint portion is disposed at a position overlapping with an upper portion of the impact absorbing member on the vehicle inner side when viewed from the side of the vehicle.

2. The vehicle side construction according to claim 1,

the cross member on the upper side of the floor panel includes an inclined portion that extends from the vehicle inner side toward the vehicle outer side in the vehicle width direction and is inclined toward the vehicle lower side, the inclined portion having a 2 nd joint portion that is joined to the rocker inner panel at a vehicle width direction outer side end portion, the 2 nd joint portion being located on an upper surface of the rocker inner panel.

3. The vehicle side construction according to claim 1 or 2,

the side member has an inner wall and an outer wall, a reinforcement that joins the inner wall and the outer wall is provided inside the side member, and an upper closed cross-sectional portion that is configured by combining the reinforcement and the floor is provided on an upper side of the reinforcement and is disposed at a position that overlaps the impact absorbing member when viewed from the side of the vehicle.

4. The vehicle side construction according to claim 3,

a cross member under the floor, which extends in the vehicle width direction and connects the pair of left and right side members, is provided under the pair of left and right side members, and the cross member under the floor is fixed to the side members by a fixing member joined to the reinforcement.

5. The vehicle side construction according to claim 1 or 2,

the floor panel has an inclined surface that extends from the vehicle inside toward the vehicle outside in the vehicle width direction and is inclined downward in the vehicle, and an in-vehicle member is mounted below the inclined surface,

a vehicle outer side end portion of a floor reinforcement member having a side member side joining portion joined to the side member is joined to the inclined surface of the floor panel, and a vehicle inner side end portion of the floor reinforcement member is joined to the floor panel at a position closer to a vehicle inner side than the inclined surface.

6. The vehicle side construction according to claim 3,

7. The vehicle side construction according to claim 4,

8. The vehicle side construction according to claim 1,

the impact absorbing member has:

an inner member and an outer member each having a hat-shaped cross section, the openings of the hat-shaped cross sections being arranged to face each other, and a joining position of an upper end portion of the inner member and an upper end portion of the outer member and a joining position of a lower end portion of the inner member and a lower end portion of the outer member being substantially the same in a vehicle width direction; and

a center member that extends linearly in a vehicle vertical direction and is joined in a state in which: the upper intermediate portion of the center member is sandwiched between the upper end portion of the inner member and the upper end portion of the outer member, the lower intermediate portion of the center member is sandwiched between the lower end portion of the inner member and the lower end portion of the outer member, and the upper portion and the lower portion of the center member are sandwiched between the rocker inner panel and the rocker outer panel.

9. The vehicle side construction according to claim 3,

the impact absorbing member has: