CN111434568B - Vehicle lower structure - Google Patents
Vehicle lower structure Download PDFInfo
- Publication number
- CN111434568B CN111434568B CN202010020893.1A CN202010020893A CN111434568B CN 111434568 B CN111434568 B CN 111434568B CN 202010020893 A CN202010020893 A CN 202010020893A CN 111434568 B CN111434568 B CN 111434568B
- Authority
- CN
- China
- Prior art keywords
- floor
- vehicle
- surface portion
- width direction
- rocker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
- B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
- B62D25/2027—Floors or bottom sub-units in connection with other superstructure subunits the subunits being rear structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
- B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
- B62D25/2036—Floors or bottom sub-units in connection with other superstructure subunits the subunits being side panels, sills or pillars
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The vehicle lower section structure of the present invention suppresses torsional vibration of the floor inclined surface portion and the floor side surface portion meandering toward the vehicle inside by providing step portions along the floor central surface portion, the floor inclined surface portion, and the floor side surface portion of the front floor. The vehicle lower portion structure includes a front floor, a rear floor, and a rocker provided at a vehicle width direction side portion of the floor, a step portion extending upward of the vehicle is provided on an upper surface of the front floor, the rear floor is disposed at an upper end of the step portion, and the front floor includes: a floor side surface portion that is located on a vehicle width direction outer side and is joined to the rocker; a floor inclined surface portion that is located further toward the vehicle width direction inner side than the floor side surface portion, and that extends further toward the vehicle inner side and is inclined further upward; and a floor center surface portion that is located on the vehicle width direction inner side of the floor inclined surface portion, is flat in the vehicle width direction, and is configured such that the stepped portion extends in the vehicle width direction and is arranged along the floor center surface portion, the floor inclined surface portion, and the floor side surface portion.
Description
Technical Field
The present invention relates to a vehicle lower portion structure.
Background
The conventional vehicle lower structure includes: a front floor panel, a kick portion (a japanese patent No. キックアップ portion) rising upward from the front floor panel, and a rear floor panel extending rearward of the vehicle from an upper end of the kick portion, and a reinforcement member is attached to the kick portion to increase the rigidity of the kick portion (see, for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2017-124656
Disclosure of Invention
Problems to be solved by the invention
In the conventional vehicle lower portion structure described above, when a structure for mounting an in-vehicle component below a front floor is used, the front floor needs to be raised upward of the vehicle, and therefore, there is a problem that sufficient torsional rigidity cannot be secured due to the kick portion after the front floor is raised.
The present invention has been made to solve the above-described problem, and an object thereof is to provide a vehicle lower section structure that can suppress torsional vibration caused by a floor inclined surface portion and a floor side surface portion meandering toward the vehicle inside by providing a stepped portion disposed along a floor center surface portion, a floor inclined surface portion, and a floor side surface portion of a front floor.
Means for solving the problems
In order to solve the problems of the prior art described above, the present invention provides a vehicle lower section structure having: a front floor and a rear floor, which are arranged along a vehicle front-rear direction; and a pair of left and right rocker beams provided on vehicle width direction side portions of the front floor and the rear floor and extending in a vehicle front-rear direction, a stepped portion extending upward of the vehicle being provided on an upper surface of the front floor on a vehicle rear side, the rear floor being disposed at an upper end of the stepped portion on the vehicle rear side, the front floor including: a floor side surface portion that is located on a vehicle width direction outer side and is joined to the rocker; a floor inclined surface portion that is located further toward the vehicle width direction inner side than the floor side surface portion, and that extends more obliquely upward toward the vehicle inner side; and a floor center surface portion that is located on a vehicle width direction inner side of the floor inclined surface portion and is flat in a vehicle width direction, wherein the step portion extends in the vehicle width direction and is arranged along the floor center surface portion, the floor inclined surface portion, and the floor side surface portion.
ADVANTAGEOUS EFFECTS OF INVENTION
As described above, the vehicle lower portion structure of the present invention includes: a front floor and a rear floor, which are arranged along a vehicle front-rear direction; and a pair of left and right rocker beams provided on vehicle width direction side portions of the front floor and the rear floor and extending in a vehicle front-rear direction, a stepped portion extending upward of the vehicle being provided on an upper surface of the front floor on a vehicle rear side, the rear floor being disposed at an upper end of the stepped portion on the vehicle rear side, the front floor including: a floor side surface portion that is located on a vehicle width direction outer side and is joined to the rocker; a floor inclined surface portion that is located further toward the vehicle width direction inner side than the floor side surface portion, and that extends further toward the vehicle inner side and is inclined further upward; and a floor center surface portion that is located on a vehicle width direction inner side of the floor inclined surface portion and is flat in a vehicle width direction, the step portion extending in the vehicle width direction and being arranged along the floor center surface portion, the floor inclined surface portion, and the floor side surface portion.
Thus, in the vehicle lower section structure of the invention, since the step portion extending in the vehicle width direction is provided so as to extend from the floor center face portion of the front floor to the floor side face portion via the floor inclined face portion, it is possible to effectively suppress torsional vibration caused by the floor inclined face portion and the floor side face portion meandering toward the vehicle inside.
In addition, at the boundary portion between the floor center surface portion and the floor inclined surface portion and the boundary portion between the floor inclined surface portion and the floor side surface portion, the front floor is bent, and when vibration is input, the boundary portion becomes a starting point of bending. Therefore, in the vehicle lower section structure of the present invention, the stepped portion is extended in the vehicle width direction to the floor inclined surface portion and the floor side surface portion, and the stepped portion is disposed at a portion that crosses the bending start point, so that it is possible to suppress the occurrence of bending of the floor inclined surface portion and the floor side surface portion toward the vehicle inside.
Drawings
Fig. 1 is a perspective view showing a front floor panel, a rear floor panel, a step portion provided on the front floor panel, and a peripheral portion thereof in a vehicle lower portion structure according to an embodiment of the present invention from a vehicle inner side obliquely upward.
Fig. 2 is an enlarged perspective view of a Z-portion in fig. 1.
Fig. 3 is a plan view of a main portion of the stepped portion in fig. 1 as viewed from above the vehicle.
Fig. 4 is a perspective view of fig. 3 taken along line a-a.
Fig. 5 is a sectional view taken along line B-B of fig. 3.
Fig. 6 is a perspective view showing a rocker-side joint portion and a side member-side joint portion of a lower cross member in a vehicle lower portion structure according to an embodiment of the present invention, obliquely from inside the vehicle.
Fig. 7 is an enlarged perspective view of a stepped portion reinforcing member in the vehicle lower portion structure according to the embodiment of the present invention.
Fig. 8 is a perspective view showing in partial section the vehicle-mounted components and their peripheral structures in the vehicle lower portion structure of the embodiment of the present invention.
Description of the reference numerals
1. A front floor; 1a, an upper surface; 2. a rear floor; 2a, a front end; 3. a lower edge beam; 4. a step portion; 4a, upper end; 4b, lower end; 5. a seat carrier; 5a, an inner wall portion; 5b, an outer wall portion; 5c, a front side wall portion; 6. a lower side beam; 6A, a beam main body part; 6B, beam ends; 7. a stringer; 8. a stepped portion reinforcing member; 11. a floor side surface portion; 12. a floor inclined plane portion; 13. a floor center face portion; 14. a floor tunnel portion; 40. an extension part of the step part; 41. a vertical wall of the step part; 42. an upper surface of the step portion; 43. a bending part; 51. an inner joint part; 52. an outer joint part; 53. a front-side joining part; 61. a rocker-side joint portion; 61a, a rear wall; 62. a stringer-side joint; 63. a reinforcing rib-shaped portion; s, closing the section part.
Detailed Description
The present invention will be described in detail below with reference to the embodiments shown in the drawings.
In the figure, the arrow Fr direction indicates the vehicle front, the arrow I direction indicates the vehicle width direction inner side, and the arrow U direction indicates the vehicle upper side. The arrow X direction indicates the vehicle width direction, and the arrow Y direction indicates the vehicle front-rear direction.
Fig. 1 to 8 show a vehicle lower portion structure according to an embodiment of the present invention. As shown in fig. 1 to 3, the vehicle lower portion structure of the present embodiment includes: a front floor panel 1 and a rear floor panel 2, the front floor panel 1 and the rear floor panel 2 being deployed in a vehicle width direction and a vehicle front-rear direction and being arranged at vehicle front-rear positions in the vehicle front-rear direction; and a pair of left and right rocker beams 3 provided on the vehicle width direction side portions of the front floor 1 and the rear floor 2 and extending in the vehicle front-rear direction, the front floor 1 being provided at a position lower than the rear floor 2 in the vehicle vertical direction. A stepped portion 4 extending upward in the vehicle is provided on an upper surface 1a of the front floor panel 1 on the vehicle rear side, and as shown in fig. 5, the rear floor panel 2 is disposed on an upper end 4a of the stepped portion 4 on the vehicle rear side, and the upper end 4a of the stepped portion 4 is joined to the front end 2a of the rear floor panel 2 so as to overlap vertically. Further, a lower end 4b of the stepped portion 4 on the vehicle front side is joined to an upper surface 1a of the front floor 1 on the vehicle rear side so as to overlap vertically.
The front floor 1 of the present embodiment includes: a floor side surface portion 11 that is located on the vehicle width direction outer side and is joined to the rocker inner panel 3a of the rocker 3; a floor inclined surface portion 12 that is located further toward the vehicle width direction inner side than the floor side surface portion 11 and that extends further toward the vehicle inner side and is inclined further upward; and a floor center surface portion 13 that is located on the vehicle width direction inner side of the floor inclined surface portion 12 and is flat in the vehicle width direction. Therefore, the front floor 1 is formed to be raised upward of the vehicle, and the floor center surface portion 13 is positioned higher than the floor side surface portion 11 and the floor inclined surface portion 12.
The front floor 1 of the present embodiment is configured to have a pair of left and right structures located on both left and right sides of a floor tunnel portion described later, each structure including a floor center surface portion 13, a floor inclined surface portion 12, and a floor side surface portion 11. The rocker 3 has a front rocker 3A and a rear rocker 3B whose ends are joined to each other.
As shown in fig. 1 to 3, the stepped portion 4 of the present embodiment extends in the vehicle width direction, is disposed along the floor center surface portion 13, the floor inclined surface portion 12, and the floor side surface portion 11 of the front floor 1, and is formed in a substantially hat shape when viewed from the front of the vehicle. That is, the stepped portion 4 extends from the floor center surface portion 13 toward the vehicle lower side along the floor inclined surface portion 12 to the floor side surface portion 11, and the front floor 1 is bent at a boundary D1 between the floor center surface portion 13 and the floor inclined surface portion 12 and at a boundary D2 between the floor side surface portion 11 and the floor inclined surface portion 12. The boundaries D1 and D2 extend in the vehicle longitudinal direction and serve as starting points of bending of the front floor panel 1 when vibration is input, but the step portion 4 is disposed so as to straddle the boundaries D1 and D2, and bending of the front floor panel 1 can be suppressed by the step portion 4.
As shown in fig. 1 to 3 and 5, the step portion 4 of the present embodiment includes: a vertical wall 41 that is located on the vehicle front side and extends in the vehicle vertical direction; and an upper surface 42 located on the vehicle rear side of the vertical wall 41, extending from the upper portion of the vertical wall 41 toward the vehicle rear, and joined to the rear floor 2, wherein the stepped portion 4 is formed in a convex shape protruding upward in the vehicle when viewed from the side of the vehicle. The vertical wall 41 of the step portion 4 is configured to extend from the location of the floor center surface portion 13 located on the vehicle inner side to the location of the floor inclined surface portion 12 and the floor side surface portion 11 located on the vehicle outer side, and can suppress bending of the front floor 1 in the vehicle vertical direction.
The height of the vertical wall 41 of the stepped portion 4 at the location where the floor center surface portion 13 is located on the vehicle inner side is greater than the height of the vertical wall 41 of the stepped portion 4 at the location where the floor inclined surface portion 12 is located, and the upper portion of the vertical wall 41 is set to a high position. Thus, the vertical wall 41 having improved rigidity in the vehicle vertical direction is continuously disposed at the location where the floor side surface portion 11 is disposed on the vehicle outer side, and the rigidity of the floor center surface portion 13, the floor inclined surface portion 12, and the floor side surface portion 11 is also improved.
Further, since the upper surface 42 of the stepped portion 4 is configured to have the bent portion 43 and the bent portion 43 is formed at the vehicle interior side with respect to the upper portion of the floor inclined surface portion 12, the bent portion 43 can achieve an effect of improving the rigidity as compared with the bent shape of the portion of the boundaries D1 and D2 between the floor central surface portion 13, the floor inclined surface portion 12, and the floor side surface portion 11.
As shown in fig. 1 to 4, the step portion 4 in the vehicle lower portion structure of the present embodiment includes an extension portion 40 disposed along the floor inclined surface portion 12 and the floor side surface portion 11 of the front floor 1, the extension portion 40 is provided at a portion of the floor side surface portion 11 where a bent portion 11a is located, and the bent portion 11a is formed in a curved shape that extends toward the vehicle rear side of the floor side surface portion 11 and is curved toward the vehicle upper side. The tower-shaped seat bracket 5 extending in the vehicle vertical direction at the position of the extension portion 40 overlapping the floor inclined surface portion 12 is set in an upright state. Therefore, the seat bracket 5 is formed such that the vertical dimension of the outer side wall portion 5b is larger than the vertical dimension of the inner side wall portion 5a, and the inner side wall portion 5a, the lower portion of the outer side wall portion 5b, and the lower portion of the front side wall portion 5c are bent outward and overlap the upper surface 42 of the stepped portion 4 and the vertical wall 41. Thus, the seat bracket 5 is joined to the upper surface 42 of the stepped portion 4 and the vertical wall 41, respectively, by setting the lower portions of the inner and outer side walls 5a and 5b and the lower portion of the front side wall 5c at predetermined positions of the stepped portion 4.
The engagement portion of the seat bracket 5 on the upper surface 42 of the step portion 4 is constituted by an inner engagement portion 51 and an outer engagement portion 52, the inner engagement portion 51 being arranged to overlap with the bent portion 43 when viewed from above the vehicle, and the outer engagement portion 52 being arranged to overlap with the extension portion 40 when viewed from above the vehicle. The front-side joining portion 53 is disposed so as to overlap the vertical wall 41 of the extension portion 40 when viewed from the front of the vehicle.
As a result, the rigidity of the stepped portion 4 is increased, so that the bending of the front floor panel 1 at the time of vibration input is suppressed, and particularly, the bending of the portion of the boundary D1 between the floor central surface portion 13 and the floor inclined surface portion 12 can be suppressed.
On the other hand, in the vehicle lower portion structure of the present embodiment, as shown in fig. 4 to 6, a lower cross member 6 extending in the vehicle width direction is provided below the stepped portion 4 in the vehicle, and the lower cross member 6 is disposed at a position overlapping the stepped portion 4 when viewed from above the vehicle. The lower cross member 6 is constituted by a beam main body portion 6A located at the vehicle width direction middle, and a beam end portion 6B located at the vehicle width direction outer side of the beam main body portion 6A. In the vehicle lower portion structure of the present embodiment, the beam end portion 6B is formed using an end member separate from the beam main body portion 6A, and the inner end portion of the beam end portion 6B is joined to the outer end portion of the beam main body portion 6A.
The beam end portion 6B of the lower cross member 6 has a rocker-side joint portion 61 joined to the rocker 3, and a side member-side joint portion 62 joined to the side members (front and rear side members) 7, and the side member 7 is disposed adjacent to the rocker 3 and on the vehicle inner side of the rocker 3. Therefore, the rocker-side joint portion 61 and the side member-side joint portion 62 of the beam end portion 6B are formed by buckling into a shape corresponding to the shapes of the rocker 3 and the side member 7, and thereby can be superposed on the joined rocker 3 and side member 7.
In this way, when the beam end portion 6B of the lower cross member 6 is formed by a member independent of the beam body portion 6A, by changing the plate thickness of the beam end portion 6B, it is possible to easily control the rigidity of the rocker-side joint portion 61 and the side member-side joint portion 62, and to simplify the forming process of the rocker-side joint portion 61 and the side member-side joint portion 62.
In the vehicle lower portion structure of the present embodiment, as shown in fig. 5, a closed cross-sectional portion S is formed by combining the lower cross member 6 and the stepped portion 4. As shown in fig. 4 and 6, the beam end portion 6B of the lower cross member 6 includes a rib-shaped portion 63 that bulges toward the vehicle lower side, the position of the rib-shaped portion 63 in the vehicle longitudinal direction coincides with the position of the convex portion 44 of the extension portion 40 of the stepped portion 4 in the vehicle longitudinal direction, which portion protrudes toward the vehicle upper side, and the closed cross-sectional area of the closed cross-sectional portion S formed by the stepped portion 4 and the lower cross member 6 is large. Further, the convex portion 44 is disposed across the boundary D2.
In this configuration, the lower cross member 6 is joined to the rocker 3 at the rocker-side joining portion 61, joined to the side member 7 at the side member-side joining portion 62, and formed into the closed cross-sectional portion S in a positional relationship overlapping with the stepped portion 4, thereby obtaining the stepped portion 4 having high rigidity.
As shown in fig. 4, the rocker-side joint portion 61 of the lower cross member 6 has a rear wall 61a that rises upward in the vehicle, and in the event of vertical vibration of the front floor 1, the rear wall 61a supports the rocker-side joint portion 61 and suppresses floor vibration. That is, the rocker-side joint portion 61 has high rigidity to suppress vibration in the vehicle width direction, and therefore, a structure having high rigidity can be obtained by joining the rear wall 61a to the rocker 3 to suppress vibration in the vehicle width direction and the vehicle vertical direction.
Further, the rear wall 61a of the rocker-side engaging portion 61 is formed by the end member of the beam end portion 6B. Further, the lower cross member 6 and the rocker 3 are connected by a beam end portion 6B.
In the vehicle lower portion structure of the present embodiment, as shown in fig. 1, 3, and 7, a floor tunnel portion 14 extending in the vehicle front-rear direction is provided between a pair of left and right floor center surface portions 13 of the front floor panel 1 (intermediate portions of the floor center surface portions 13 in the vehicle width direction). A stepped portion reinforcing member 8 that extends across the floor tunnel portion 14 in the vehicle width direction is joined to the stepped portion 4, and the stepped portion reinforcing member 8 is configured to suppress vertical vibration of the front floor panel 1 from the floor tunnel portion 14. Therefore, the stepped portion reinforcing member 8 has a length in the vehicle width direction that can span the floor tunnel portion 14, and has curved joint portions 8a, 8b, 8c, the joint portions 8a, 8b, 8c being capable of overlapping with the vertical wall 41, the upper surface 42, and the lower end 4b of the joined stepped portion 4.
In the vehicle lower portion structure of the present embodiment, as shown in fig. 8, vehicle-mounted devices (for example, a battery, a fuel tank, and the like) 9 are provided below the front floor panel 1. That is, the front floor 1 is raised upward of the vehicle at a portion where the floor center surface portion 13 including the floor tunnel portion 14 is located, the height position of the floor center surface portion 13 is located above the vehicle with respect to the floor side surface portion 11 and the floor inclined surface portion 12, and the in-vehicle equipment 9 can be stored and mounted in a space formed below the floor center surface portion 13. The in-vehicle equipment 9 stored in the space below the floor center surface portion 13 is disposed between the floor inclined surface portions 12 positioned on the left and right sides in the vehicle width direction, and is disposed so as to overlap with the rocker inner panel 3a of the rocker 3 when viewed from the vehicle side.
Thus, even if the front floor 1 is improved, the torsional rigidity of the vehicle body can be improved, and the in-vehicle device 9 can be protected from the impact load at the time of a side collision.
As described above, the vehicle lower portion structure according to the embodiment of the present invention includes: a front floor panel 1 and a rear floor panel 2, the front floor panel 1 and the rear floor panel 2 being arranged along a vehicle front-rear direction; and a pair of left and right rocker beams 3 provided on the vehicle width direction side portions of the front floor panel 1 and the rear floor panel 2 and extending in the vehicle front-rear direction. A stepped portion 4 extending upward in the vehicle is provided on an upper surface 1a of the front floor panel 1 on the vehicle rear side, and the rear floor panel 2 is disposed on an upper end 4a of the stepped portion 4 on the vehicle rear side. In addition, the front floor 1 has: a floor side surface portion 11 that is located on the vehicle width direction outer side and is joined to the rocker 3; a floor inclined surface portion 12 that is located further toward the vehicle width direction inner side than the floor side surface portion 11 and extends further toward the vehicle inner side and is inclined further upward; and a floor center face portion 13 that is located on the vehicle width direction inner side of the floor inclined face portion 12 and is flat in the vehicle width direction. The stepped portion 4 of the vehicle lower structure of the present embodiment extends in the vehicle width direction and is disposed along the floor center surface portion 13, the floor inclined surface portion 12, and the floor side surface portion 11.
Therefore, in the vehicle lower portion structure of the present embodiment, since the stepped portion 4 extends from the floor center surface portion 13 of the front floor 1 across the floor inclined surface portion 12 and the floor side surface portion 11 in the vehicle width direction and extends to the floor inclined surface portion 12 and the floor side surface portion 11, even if the front floor 1 is of an improved structure, the torsional rigidity of the front floor 1 can be improved, and torsional vibration when vibration that meanders toward the vehicle inside is input to the floor inclined surface portion 12 and the floor side surface portion 11 can be suppressed.
In particular, the front floor panel 1 is bent at the boundary D1 between the floor center surface portion 13 and the floor inclined surface portion 12 and at the boundary D2 between the floor inclined surface portion 12 and the floor side surface portion 11, and when vibration is input, the boundaries D1 and D2 serve as starting points of bending. Therefore, in the vehicle lower portion structure of the present invention, the stepped portion 4 is arranged at a portion that crosses the bending start point by extending the stepped portion 4 in the vehicle width direction to the floor inclined surface portion 12 and the floor side surface portion 11, and therefore, the floor inclined surface portion 12 and the floor side surface portion 11 can be suppressed from being bent toward the vehicle inside at the time of input of vibration.
In the vehicle lower portion structure of the present embodiment, the step portion 4 includes: a vertical wall 41 that is located on the vehicle front side and extends in the vehicle vertical direction; and an upper surface 42 that is located on the vehicle rear side of the vertical wall 41 and is joined to the rear floor 2. Therefore, in the vehicle lower portion structure of the present embodiment, the vertical wall 41 of the step portion 4 extends from the location of the floor central surface portion 13 located on the vehicle inner side to the location of the floor inclined surface portion 12 and the floor side surface portion 11 located on the vehicle outer side, so that the bending of the front floor 1 in the vehicle vertical direction at the time of input of vibration can be effectively suppressed.
In the vehicle lower portion structure of the present embodiment, since the upper surface 42 of the stepped portion 4 has the bent portion 43 and the bent portion 43 is formed at the vehicle inner side of the upper portion of the floor inclined surface portion 12, the rigidity of the zigzag-shaped portions of the floor center surface portion 13, the floor inclined surface portion 12, and the floor side surface portion 11 of the front floor panel 1 can be improved.
In the vehicle lower portion structure of the present embodiment, the step portion 4 includes the extension portion 40 disposed along the floor inclined surface portion 12 and the floor side surface portion 11, and the seat bracket 5 is provided at a position of the extension portion 40 overlapping the floor inclined surface portion 12. The seat bracket 5 is joined to the upper surface 42 of the stepped portion 4 and the vertical wall 41, the joint portion of the seat bracket 5 on the upper surface 42 of the stepped portion 4 is constituted by an inner joint portion 51 and an outer joint portion 52, the inner joint portion 51 is arranged to overlap the bent portion 43 when viewed from above the vehicle, and the outer joint portion 52 is arranged to overlap the extension portion 40 when viewed from above the vehicle.
Therefore, in the vehicle lower portion structure of the present embodiment, since the inner joint portion 51 and the outer joint portion 52 of the seat bracket 5 are joined to the stepped portion 4 at the respective corresponding bent portions 43 and the extension portions 40, the rigidity of the stepped portion 4 can be increased, and bending of the floor center surface portion 13 and the floor inclined surface portion 12 of the front floor panel 1 at the time of input of vibration can be further suppressed.
In the vehicle lower portion structure of the present embodiment, the lower cross member 6 extending in the vehicle width direction is provided below the stepped portion 4 in the vehicle, and the lower cross member 6 is disposed at a position overlapping the stepped portion 4 when viewed from above the vehicle. The lower cross member 6 has a rocker-side joint portion 61 joined to the rocker 3, and has a side member-side joint portion 62 joined to the side member 7, and the side member 7 is disposed adjacent to the rocker 3 and on the vehicle inner side of the rocker 3. In addition, the closed cross-sectional portion S is formed by combining the lower cross member 6 and the step portion 4.
Therefore, in the vehicle lower portion structure of the present embodiment, the lower side cross member 6 is joined to the rocker 3 at the rocker-side joining portion 61 and joined to the side member 7 at the side member-side joining portion 62, and the closed cross-sectional portion S is formed at a position overlapping the step portion 4, so that the rigidity of the step portion 4 can be further increased.
Further, in the vehicle lower portion structure of the present embodiment, since the rocker-side joint portion 61 has the rear wall 61a that rises upward in the vehicle, when the front floor panel 1 vibrates vertically, the rocker-side joint portion 61 can be supported by the rear wall 61a, and floor vibration can be effectively suppressed. That is, in the vehicle lower portion structure of the present embodiment, the rocker-side joint portion 61 has high rigidity to suppress vibration in the vehicle width direction, and therefore, by joining the rear wall 61a to the rocker 3, high rigidity can be obtained to suppress vibration in the vehicle width direction and the vehicle vertical direction.
In the vehicle lower portion structure of the present embodiment, the floor tunnel portion 14 extending in the vehicle front-rear direction is provided in the vehicle width direction intermediate portion of the floor center surface portion 13, and the stepped portion reinforcement member 8 disposed in the vehicle width direction and spanning the floor tunnel portion 14 is joined to the stepped portion 4, so that the rigidity of the stepped portion 4 can be increased by the stepped portion reinforcement member 8, and the vertical vibration of the front floor panel 1 starting from the floor tunnel portion 14 can be suppressed.
While the embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various modifications and changes can be made based on the technical idea of the present invention.
For example, in the lower cross member 6 of the above-described embodiment, the beam end portion 6B is formed by a member separate from the beam main body portion 6A, but the beam main body portion 6A and the beam end portion 6B may be integrally formed by the same member.
Claims (7)
1. A vehicle lower section structure, comprising: a front floor and a rear floor, which are arranged along a vehicle front-rear direction; and a pair of left and right rocker beams provided at vehicle width direction side portions of the front floor and the rear floor and extending in a vehicle front-rear direction,
a stepped portion extending upward of the vehicle is provided on an upper surface of the front floor on the vehicle rear side, the rear floor is disposed at an upper end of the stepped portion on the vehicle rear side,
the front floor has: a floor side portion that is located on a vehicle width direction outer side and is joined to the rocker; a floor inclined surface portion that is located further toward the vehicle width direction inner side than the floor side surface portion, and that extends further toward the vehicle inner side and is inclined further upward; and a floor center face portion that is located on a vehicle width direction inner side of the floor inclined face portion and is flat in a vehicle width direction,
the vehicle lower portion structure is characterized in that,
the step portion extends in the vehicle width direction and is disposed along the floor center surface portion, the floor inclined surface portion, and the floor side surface portion.
2. The vehicle substructure according to claim 1,
a lower side cross member extending in the vehicle width direction is provided below the stepped portion in the vehicle,
the lower cross member has a rocker-side joint portion joined to the rocker, and has a side member-side joint portion joined to a side member disposed adjacent to the rocker and on the vehicle inner side of the rocker.
3. The vehicle substructure according to claim 2,
the rocker-side joint portion has a rear wall rising upward of the vehicle.
4. The vehicle lower structure according to claim 2 or 3,
the lower cross member is disposed at a position overlapping the stepped portion when viewed from above the vehicle, and the lower cross member is combined with the stepped portion to form a closed cross-sectional portion.
5. The vehicle substructure according to claim 1,
the step portion has: a vertical wall located on a vehicle front side and extending in a vehicle vertical direction; and an upper surface located on a vehicle rear side of the vertical wall and joined to the rear floor, wherein the upper surface of the stepped portion has a bent portion formed further toward a vehicle inner side than an upper portion of the floor inclined surface portion.
6. The vehicle substructure according to claim 5,
the step portion has an extension portion disposed along the floor inclined surface portion and the floor side surface portion, a seat bracket is provided at a position of the extension portion overlapping the floor inclined surface, the seat bracket is joined to the upper surface of the step portion and the vertical wall, a joining portion of the seat bracket located on the upper surface is constituted by an inner joining portion disposed to overlap the bent portion when viewed from above the vehicle, and an outer joining portion disposed to overlap the extension portion when viewed from above the vehicle.
7. The vehicle substructure according to claim 1,
a floor tunnel portion extending in the vehicle front-rear direction is provided at a vehicle width direction intermediate portion of the floor center surface portion, and a stepped portion reinforcement member that spans the floor tunnel portion in the vehicle width direction is joined to the stepped portion.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-004564 | 2019-01-15 | ||
| JP2019004564A JP7206931B2 (en) | 2019-01-15 | 2019-01-15 | Underbody structure |
| JP2019-030813 | 2019-02-22 | ||
| JP2019030813A JP7274119B2 (en) | 2019-02-22 | 2019-02-22 | vehicle undercarriage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111434568A CN111434568A (en) | 2020-07-21 |
| CN111434568B true CN111434568B (en) | 2022-07-08 |
Family
ID=71131859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010020893.1A Active CN111434568B (en) | 2019-01-15 | 2020-01-09 | Vehicle lower structure |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN111434568B (en) |
| DE (1) | DE102019134468B4 (en) |
| FR (1) | FR3091687B1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020067053A1 (en) * | 2000-12-01 | 2002-06-06 | Werner Wolkersdorfer | Vehicle floor structure and method of making same |
| JP2011173506A (en) * | 2010-02-24 | 2011-09-08 | Daihatsu Motor Co Ltd | Cross member structure |
| CN103502086A (en) * | 2010-07-23 | 2014-01-08 | 雷诺股份公司 | Motor vehicle chassis comprising raised seat beam |
| CN103619694A (en) * | 2011-10-14 | 2014-03-05 | 铃木株式会社 | Floor structure for vehicle body rear part |
| CN104648491A (en) * | 2013-11-19 | 2015-05-27 | 铃木株式会社 | Floor structure of vehicle |
| CN106428232A (en) * | 2015-08-04 | 2017-02-22 | 本田技研工业株式会社 | Vehicle body structure |
| JP2017124656A (en) * | 2016-01-12 | 2017-07-20 | 本田技研工業株式会社 | Vehicle body structure of vehicle |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6085854A (en) | 1994-12-13 | 2000-07-11 | Nissan Motor Co., Ltd. | Battery frame structure for electric motorcar |
| JP4858183B2 (en) | 2007-01-22 | 2012-01-18 | 日産自動車株式会社 | Lower body structure |
| DE102008020527A1 (en) | 2008-04-24 | 2009-10-29 | GM Global Technology Operations, Inc., Detroit | Frame structure for a motor vehicle |
| FR2962964B1 (en) | 2010-07-23 | 2014-03-21 | Renault Sa | REUSED REAR FLOOR CHASSIS AND ASSEMBLY METHOD. |
| EP2620353B1 (en) | 2010-11-10 | 2015-09-02 | Honda Motor Co., Ltd. | Automobile floor structure |
| JP6794733B2 (en) * | 2016-09-14 | 2020-12-02 | スズキ株式会社 | Seat mounting structure |
| JP6823825B2 (en) * | 2016-09-20 | 2021-02-03 | スズキ株式会社 | Body floor structure |
-
2019
- 2019-11-27 FR FR1913330A patent/FR3091687B1/en active Active
- 2019-12-16 DE DE102019134468.9A patent/DE102019134468B4/en active Active
-
2020
- 2020-01-09 CN CN202010020893.1A patent/CN111434568B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020067053A1 (en) * | 2000-12-01 | 2002-06-06 | Werner Wolkersdorfer | Vehicle floor structure and method of making same |
| JP2011173506A (en) * | 2010-02-24 | 2011-09-08 | Daihatsu Motor Co Ltd | Cross member structure |
| CN103502086A (en) * | 2010-07-23 | 2014-01-08 | 雷诺股份公司 | Motor vehicle chassis comprising raised seat beam |
| CN103619694A (en) * | 2011-10-14 | 2014-03-05 | 铃木株式会社 | Floor structure for vehicle body rear part |
| CN104648491A (en) * | 2013-11-19 | 2015-05-27 | 铃木株式会社 | Floor structure of vehicle |
| CN106428232A (en) * | 2015-08-04 | 2017-02-22 | 本田技研工业株式会社 | Vehicle body structure |
| JP2017124656A (en) * | 2016-01-12 | 2017-07-20 | 本田技研工業株式会社 | Vehicle body structure of vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3091687B1 (en) | 2023-07-14 |
| FR3091687A1 (en) | 2020-07-17 |
| CN111434568A (en) | 2020-07-21 |
| DE102019134468B4 (en) | 2024-03-21 |
| DE102019134468A1 (en) | 2020-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4272626B2 (en) | Lower body structure | |
| JP6052226B2 (en) | Vehicle front structure | |
| CN107922015B (en) | Frame structure of vehicle | |
| EP1808363A1 (en) | Vehicle roof structure | |
| CN109476348B (en) | Vehicle body front structure | |
| JP4276630B2 (en) | Vehicle cowl structure | |
| JP6600873B2 (en) | Body structure | |
| JP6102870B2 (en) | Body front structure | |
| CN109895869B (en) | Floor structure of vehicle body | |
| CN109476349A (en) | Vehicle body frames construction | |
| JP6649422B2 (en) | Vehicle door structure | |
| JP2019127099A (en) | Upper body structure of vehicle | |
| JP5115393B2 (en) | Seat attachment structure | |
| JP2005343279A (en) | Hood structure for vehicle | |
| JP5207228B2 (en) | Inner panel for vehicle | |
| JP2016078474A (en) | Vehicle front part structure | |
| JP2006193037A (en) | Upper structure of vehicle body | |
| JP5560069B2 (en) | Floor structure | |
| CN111434568B (en) | Vehicle lower structure | |
| CN112298366A (en) | Cross member structure of vehicle body | |
| JP5228864B2 (en) | Rocker structure | |
| JP2006327463A (en) | Vehicle body structure | |
| JP6123506B2 (en) | Vehicle rear structure | |
| CN210852667U (en) | Vehicle body member, vehicle body member assembly, and vehicle body structure | |
| JP5115386B2 (en) | Vehicle floor structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |