FR3091686A1 - Structure inferieure de corps de vehicule - Google Patents
Structure inferieure de corps de vehicule Download PDFInfo
- Publication number
- FR3091686A1 FR3091686A1 FR1913711A FR1913711A FR3091686A1 FR 3091686 A1 FR3091686 A1 FR 3091686A1 FR 1913711 A FR1913711 A FR 1913711A FR 1913711 A FR1913711 A FR 1913711A FR 3091686 A1 FR3091686 A1 FR 3091686A1
- Authority
- FR
- France
- Prior art keywords
- vehicle
- outer side
- floor
- width direction
- vehicle width
- 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.)
- Granted
Links
- 230000002787 reinforcement Effects 0.000 claims abstract description 33
- 238000003466 welding Methods 0.000 description 34
- 239000000725 suspension Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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- 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
- B62D25/2018—Floors or bottom sub-units in connection with other superstructure subunits the subunits being front structures
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- 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
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Des éléments latéraux de plancher constituant une structure inférieure de corps de véhicule ont des parties inclinées côté intérieur (31b, 32b) inclinées en direction du côté intérieur ; un renfort (40) présente une partie intermédiaire (44) s'étendant de part et d’autre d’un tunnel de plancher (11), et des parties inclinées côté extérieur (41, 42) s'étendant depuis chacune des parties latérales de la partie intermédiaire (44) en direction des parties inclinées côté intérieur (31b, 32b) ; des brides (44a, 44b) de la partie intermédiaire (44) sont jointes à une partie de bord d'ouverture (16) du tunnel de plancher (11) ; sur la partie latérale des parties inclinées côté extérieur (41, 42), des brides côté extérieur (41c, 42c) sont prévues, lesquelles s'étendent en direction du côté extérieur ; et les brides côté extérieur (41c, 42c) sont jointes aux parties inclinées côté intérieur (31b, 32b). Figure de l’abrégé : Figure 2
Description
This disclosure pertains to the field of vehicle body lower structures.
Floor side members (31, 32) extending in a vehicle front-rear direction are joined to both side portions in a vehicle width direction of a floor panel at a vehicle body lower portion for the purpose of improving the rigidity of the floor panel. For example, in the case of a vehicle driven by a battery, the battery is installed on the floor panel.
Furthermore, a vehicle body structure member constituting the framework of the vehicle body is joined to the floor panel. Structures constituting vibration sources such as a drive motor and a suspension are mounted to the vehicle structure member. Thus, the vibration of the structures is transmitted to the floor panel via the vehicle structure member.
On the other hand, in the case in which a battery is mounted on the floor panel, in order to secure the in-floor-panel space for installing the battery, there is known a structure in which the floor side members (31, 32) are inclined toward the outer side in the vehicle width direction as they extend toward the vehicle rear side as disclosed, for example, in document JP 2015-151004 A.
When the floor side members (31, 32) are inclined as described above, the main floor portion becomes wider, and the battery installation area is enlarged. In the inclined structure, however, the main floor portion undergoes, for example, shearing deformation, whereby there is the possibility of a front side member being subject to vibration in the vehicle front-rear direction.
When the floor panel vibrates due to the transmission of the vibration, noise is generated in the vehicle interior. Furthermore, when a front collision, an offset collision or the like occurs, there is the possibility of the floor panel situated on the inner side of both floor side members (31, 32) undergoing distorting deformation. That is, in the above-described structure, there is room for improvement from the viewpoint of efficiently absorbing a collision load. Furthermore, there is the possibility of a sufficient effect not being attained even if a reinforcement member is provided to simply cope with the distortion.
Summary
The present invention has been made with a view toward solving the abovementioned problem. It is an object of the present invention to provide a vehicle body lower structure in which floor side members (31, 32) are inclined with respect to the vehicle front-rear direction, wherein it is possible to suppress deformation of a floor panel and to disperse the collision load and to reduce an amplitude of panel vibration.
It is proposed a vehicle body lower structure equipped with a main floor panel arranged at a vehicle body lower portion, and floor side members (31, 32) joined to both sides in a vehicle width direction of a lower surface of the main floor panel,
the vehicle body lower structure being provided, in an intermediate portion (44) in the vehicle width direction of the main floor panel, with a floor tunnel which is open to a vehicle lower side and which extends in a vehicle front-rear direction,
characterized in that each floor side member has a linear portion extending in the vehicle front-rear direction, and an inner side inclined portion extending so as to be inclined toward an inner side in the vehicle width direction as the inner side inclined portion extends from a front portion of the linear portion toward a vehicle front side;
on a lower surface side of the main floor panel, a reinforcement extending in the vehicle width direction is arranged, and the reinforcement has an intermediate portion (44) extending across the floor tunnel, and an outer side inclined portion extending from both side portions in the vehicle width direction of the intermediate portion (44) toward the inner side inclined portion;
the intermediate portion (44) and the outer side inclined portion exhibit a hat-like sectional shape open to a vehicle upper side, and each of a front portion and a rear portion of the intermediate portion (44) and the outer side inclined portion is provided with a flange;
the flange of the intermediate portion (44) is joined to an opening edge portion of the floor tunnel; and
an outer side portion in the vehicle width direction of the outer side inclined portion is provided with an outer side flange extending toward the outer side in the vehicle width direction, and the outer side flange is joined to the inner side inclined portion.
the vehicle body lower structure being provided, in an intermediate portion (44) in the vehicle width direction of the main floor panel, with a floor tunnel which is open to a vehicle lower side and which extends in a vehicle front-rear direction,
characterized in that each floor side member has a linear portion extending in the vehicle front-rear direction, and an inner side inclined portion extending so as to be inclined toward an inner side in the vehicle width direction as the inner side inclined portion extends from a front portion of the linear portion toward a vehicle front side;
on a lower surface side of the main floor panel, a reinforcement extending in the vehicle width direction is arranged, and the reinforcement has an intermediate portion (44) extending across the floor tunnel, and an outer side inclined portion extending from both side portions in the vehicle width direction of the intermediate portion (44) toward the inner side inclined portion;
the intermediate portion (44) and the outer side inclined portion exhibit a hat-like sectional shape open to a vehicle upper side, and each of a front portion and a rear portion of the intermediate portion (44) and the outer side inclined portion is provided with a flange;
the flange of the intermediate portion (44) is joined to an opening edge portion of the floor tunnel; and
an outer side portion in the vehicle width direction of the outer side inclined portion is provided with an outer side flange extending toward the outer side in the vehicle width direction, and the outer side flange is joined to the inner side inclined portion.
According to the present invention, there is provided a structure in which floor side members (31, 32) are inclined in the vehicle front-rear direction, wherein deformation of a floor panel is suppressed, and it is possible to disperse a collision load and reduce an amplitude of panel vibration.
The following features, can be optionally implemented, separately or in combination one with the others.
The main floor panel situated at a rear portion of the floor tunnel is provided with a step portion extending toward the vehicle upper side with respect to the opening edge portion of the floor tunnel.
A floor cross member extending in the vehicle width direction is provided on an upper surface of the main floor panel;
a front portion of the floor cross member is joined to a vehicle front side of the step portion, and a rear portion of the floor cross member is joined to a vehicle rear side of the step portion; and
the front portion of the floor cross member, the flange of the reinforcement, and the main floor panel are joined together threefold..
a front portion of the floor cross member is joined to a vehicle front side of the step portion, and a rear portion of the floor cross member is joined to a vehicle rear side of the step portion; and
the front portion of the floor cross member, the flange of the reinforcement, and the main floor panel are joined together threefold..
On the vehicle front side of the reinforcement, a front cross member is arranged so as to extend in the vehicle width direction across the floor tunnel, and the outer side portion in the vehicle width direction of the front cross member is joined to the inner side inclined portion of the floor side member; and
a joining portion of the outer side flange and the inner side inclined portion is adjacent to a joining portion of the inner side inclined portion and the front cross member.
a joining portion of the outer side flange and the inner side inclined portion is adjacent to a joining portion of the inner side inclined portion and the front cross member.
Other features, details and advantages will be shown in the following detailed description and on the figures, on which:
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Figures and the following detailed description contain, essentially, some exact elements. They can be used to enhance understanding the disclosure and, also, to define the invention if necessary.
In the following, an embodiment of a vehicle body lower structure according to the present invention will be described with reference to the drawings (Figures 1 through 5). The vehicle body lower structure of the present embodiment is, for example, the vehicle body lower structure of an electric vehicle driven by a battery (not shown).
In the drawings, the arrow Fr indicates the front side in the vehicle front-rear direction. The "front portion (front end) and rear portion (rear end)" in the description of the embodiment correspond to the front portion and the rear portion in the vehicle front-rear direction. The right side and left side correspond to the left side and right side when the occupant faces the vehicle front side.
The vehicle body lower structure of the present embodiment has a main floor panel 10. A battery is installed on the lower surface side of the main floor panel 10. Furthermore, the vehicle body lower structure has front side members 21 and 22, a front cross member 25, floor side members (31, 32) 31 and 32, and a reinforcement 40. To secure a wide space for mounting the battery, the floor side members (31, 32) 31 and 32 are open in the shape of the Japanese katakana character for "ha" (right and left outwardly sloping lines), and are joined to side sills 24a and 24b. These members will be described in detail below.
The main floor panel 10 is a panel member arranged in the vehicle body lower portion. As shown in Figure 1, it is a plate-like member extending from a portion near the rear portions of the right and left front wheels (not shown) toward the vehicle rear side. The dimension in the vehicle width direction of the main floor panel 10 substantially corresponds to the dimension in the vehicle width direction of the vehicle body.
Substantially at the central portion (intermediate portion (44)) in the vehicle width direction of the main floor panel 10, there is provided a floor tunnel 11. The floor tunnel 11 is open to the vehicle lower side and extends in the vehicle front-rear direction. The central portion in the vehicle width direction of the lower surface of the main floor panel 10 is recessed toward the vehicle upper side in downward view, whereby the floor tunnel 11 is formed.
In this example, the floor tunnel 11 is formed by a different member from the main floor panel 10. The member forming the floor tunnel 11 has a hat-like sectional shape in vehicle front-rear view. The member is joined to an upper surface side opening edge portion of the main floor panel 10 so as to stop from above an opening provided at the center in the vehicle width direction of the main floor panel 10 and extending in the vehicle front-rear direction (Figure 5). It is also possible to deform the upper surface of the main floor panel 10 so as to swell toward the vehicle upper side, and to form the floor tunnel 11 integrally with the main floor panel 10.
As shown in Figures 2 and 3, the main floor panel 10 has a lower step surface 16 situated at the opening edge portion of the floor tunnel 11, and, at the rear end of the floor tunnel 11, there is provided a step portion 15 extending toward the vehicle upper side with respect to the lower step surface 16. At the vehicle rear side of the floor tunnel 11, there is provided an upper step surface 17 situated on the vehicle upper side with respect to the lower step surface 16, and the lower step surface 16 and the upper step surface 17 are connected to each other by a vertical wall surface 18 gradually inclined toward the vehicle upper side as it extends toward the vehicle rear side. The vertical wall surface 18 constituting the step portion 15 is situated on either side in the vehicle width direction of the floor tunnel 11, and extends in the vehicle width direction. Although not shown, the battery is installed on the upper step surface 17 situated at the rear of the step portion 15.
As shown in Figure 1, the front side members 21 and 22 include the front side member 21 on the right side and the front side member 22 on the left side, and each of the front side members 21 and 22 on both sides protrudes and extends toward the vehicle front side from the front portion of the main floor panel 10. The front side members 21 and 22 on both sides are arranged on the inner side in the vehicle width direction of the right and left front wheels (not shown) at a mutual interval in the vehicle width direction so as to constitute a pair of right and left members. The front side members 21 and 22 are high rigidity members constituting the vehicle body framework, and are formed of a metal material. Between the right and left front side members 21 and 22, a drive motor or the like (not shown) for driving the wheels is arranged.
As shown in Figure 1, the front cross member 25 is arranged on the lower surface side of the main floor panel 10, and extends in the vehicle width direction. As shown in Figures 2 and 3, the front cross member 25 has a central member 26, a right outer side member 27, and a left outer side member 28. The central member 26 extends in the vehicle width direction across the floor tunnel 11. Both side portions in the vehicle width direction of the central member 26 are joined to the lower step surface 16 situated on both sides in the vehicle width direction of the floor tunnel 11 by spot welding or the like.
The rear portion of the central member 26 extends linearly in the vehicle width direction. The front portion of the central member 26 is gradually inclined toward the vehicle front side as it extends toward the outer side in the vehicle width direction. That is, the length in the vehicle front-rear direction of the central member 26 is set such that it is longer on the outer side in the vehicle width direction with respect to the center in the vehicle width direction of the central member 26.
The right outer side member 27 is a member joined to the right outer side portion in the vehicle width direction of the central member 26 by spot welding or the like, and extends from the right outer side portion in the vehicle width direction of the central member 26 to the right outer side in the vehicle width direction. The rear portion of the right outer side member 27 extends linearly in the vehicle width direction so as to be continuous with the rear portion of the central member 26. The front portion of the right outer side member 27 extends while gradually inclining toward the vehicle front side as it extends toward the outer side in the vehicle width direction so as to be continuous with the front portion of the central member 26. That is, the length in the vehicle front-rear direction of the right outer side member 27 is set so as to be gradually longer as it extends toward the outer side in the vehicle width direction.
The front portion on the outer side in the vehicle width direction of the right outer side member 27 is joined to the lower surface of the rear portion of the right side front side member 21, and the rear portion on the outer side in the vehicle width direction of the right outer side member 27 is joined to the lower surface of an inner side inclined portion 31b of a right side floor side member 31 described below. The abovementioned joining is effected, for example, by spot welding. The welding point of the rear portion on the outer side in the vehicle width direction of the right outer side member 27 and the lower surface of the inner side inclined portion 31b of the right side floor side member 31 is indicated at P17 in Figures 2 and 3.
The left outer side member 28 is a member joined to the left outer side portion in the vehicle width direction of the central member 26 by spot welding or the like, and extends from the left outer side portion in the vehicle width direction of the central member 26 toward the left outer side in the vehicle width direction. Like the right outer side member 27, the rear portion of the left outer side member 28 extends linearly in the vehicle width direction, and the front portion of the left outer side member 28 is inclined. The front portion on the outer side in the vehicle width direction of the left outer side member 28 is joined to the lower surface of the rear portion of the left side front side member 22, and the rear portion on the outer side in the vehicle width direction of the left outer side member 28 is joined to the lower surface of an inner side inclined portion 32b of a left side floor side member 32 described below. The welding point of the rear portion on the outer side in the vehicle width direction of the left outer side member 28 of the lower surface of the inner side inclined portion 32b of the left side floor side member 32 is indicated at P18 in Figures 2 and 3.
Like the front side members 21 and 22, the front cross member 25 is a high rigidity member constituting the vehicle body framework. The central member 26, the right outer side member 27, and the left outer side member 28 are formed of a metal material.
As shown in Figure 1, on the vehicle front side of the front cross member 25, a suspension frame 23 is arranged. The suspension frame 23 is a high rigidity member supporting a suspension (not shown), and is joined to the rear portions, etc. of the right side and left side front side members 21 and 22 by spot welding or the like via a brace or the like.
Next, the floor side members (31, 32) 31 and 32 will be described. As shown in Figures 2 and 3, the floor side members (31, 32) 31 and 32 include a right side floor side member 31 and a left side floor side member 32. The floor side members (31, 32) 31 and 32 on both sides are arranged at a mutual interval in the vehicle width direction so as to constitute a pair of right and left members.
The right side floor side member 31 is a member arranged on the right outer side in the vehicle width direction of the lower surface of the main floor panel 10, and has a linear portion 31a and an inner side inclined portion 31b. The linear portion 31a extends in the vehicle front-rear direction, is joined to the edge on the right outer side in the vehicle width direction of the lower surface of the main floor panel 10 by spot welding or the like, and is, further, joined to the right side sill 24a extending in the vehicle front-rear direction.
The inner side inclined portion 31b is joined to the lower surface of the main floor panel 10, and extends while inclined inwards in the vehicle width direction as it extends from the front portion of the linear portion 31a toward the vehicle front side. The front portion of the inner side inclined portion 31b is joined to the rear portion of the right side front side member 21. A detailed illustration of the joining portion (welding point) is left out. The angle made by the inner wall surface on the inner side in the vehicle width direction of the inner side inclined portion 31b and the inner wall surface on the inner side in the vehicle width direction of the linear portion 31a is an obtuse angle, which, in this example, is approximately 150 degrees. As described above, the right outer side member 27 of the front cross member 25 is joined to the lower surface of the inner side inclined portion 31b by spot welding or the like at welding point P17.
As shown in Figures 2 and 3, the left side floor side member 32 is a member arranged on the left outer side in the vehicle width direction of the lower surface of the main floor panel 10, and, like the right side floor side member 31, has a linear portion 32a and an inner side inclined portion 32b. The linear portion 32a extends in the vehicle front-rear direction, is joined to the edge on the left outer side in the vehicle width direction of the lower surface of the main floor panel 10, and, is, further, joined to the left side sill 24b. The inner side inclined portion 32b is joined to the lower surface, and extends while gradually inclining toward the inner side in the vehicle width direction as it extends toward the vehicle front side from the front portion of the linear portion 32a. The front portion of the inner side inclined portion 32b is joined to the rear portion of the left side front side member 22.
As described above, the outer side portion in the vehicle width direction of the left outer side member 28 of the front cross member 25 is joined to the lower surface of the inner side inclined portion 32b by spot welding or the like at welding point P18. The inner side inclined portions 31b and 32b of the right side and left side floor side members (31, 32) 31 and 32 are arranged so as to approach each other as they extend toward the vehicle front side.
The floor side members (31, 32) 31 and 32 have a first member mainly constituting the linear portion 31a, 32a, and a second member constituting part of the linear portion 31a, 32a and the inner side inclined portion 31b, 32b, and are formed through the joining of the first member and the second member by spot welding or the like. The second member is formed such that the front portion of the linear portion 31a, 32a is curved to be connected to the inner side inclined portion 31b, 32b. An illustration of the boundary between the first member and the second member is left out. It is also possible for the first member and the second member to be formed integrally.
As shown in Figures 1 through 3, the reinforcement 40 is a member generally extending in the vehicle width direction and has an intermediate portion (44) 44, a right outer side inclined portion 41, and a left outer side inclined portion 42. In this example, the intermediate portion (44) 44, the right outer side inclined portion 41, and the left outer side inclined portion 42 are formed integrally.
The intermediate portion (44) 44, the right outer side inclined portion 41, and the left outer side inclined portion 42 are of a hat-like sectional shape open to the vehicle upper side. The front portion and the rear portion of each of the intermediate portion (44) 44, the right outer side inclined portion 41, and the left outer side inclined portion 42 are respectively provided with front side flanges 44a, 41a, and 42a and the rear side flanges 44b, 41b, and 42b. The front side flanges 44a, 41a, and 42a and the rear side flanges 44b, 41b, and 42b are portions corresponding to the front collar and the rear collar of the hat-like section. The flanges 41a, 42a, 44a, 41b, 42b, and 44b are joined to the lower surface or the like of the main floor panel 10. The joining positions, etc. will be described below.
The intermediate portion (44) 44 extends in the vehicle width direction across the floor tunnel 11. The rear side flange 44b of the intermediate portion (44) 44 extends in the vehicle width direction. The front side flange 44a of the intermediate portion (44) 44 is inclined toward the vehicle front side as it extends toward the outer side in the vehicle width direction. In this example, the length in the vehicle front-rear direction of the intermediate portion (44) 44 is set to be longer on the outer side in the vehicle width direction than at the center in the vehicle width direction of the central portion.
Both side portions in the vehicle width direction of the front side flange 44a of the intermediate portion (44) 44 are joined to the opening edge portion of the floor tunnel 11 by spot welding or the like at welding points P13 and P14 shown in Figures 2 and 3. Both side portions in the vehicle width direction of the rear side flange 44b of the intermediate portion (44) 44 are also joined to the opening edge portion of the floor tunnel 11 at welding points P11 and P12. The welding points P11 and P12 of the rear side flange 44b are adjacent on the vehicle front side to the vertical wall surface 18 constituting the step portion 15. In this example, the welding points P11 and P12 of the rear side flange 44b are arranged at the corner portion of the rear end of the opening edge portion of the floor tunnel 11.
As shown in Figures 2 and 3, the right outer side inclined portion 41 extends from the right side portion in the vehicle width direction of the intermediate portion (44) 44 toward the outer side in the vehicle width direction so as to be inclined toward the vehicle front side. In this example, the angle made by the front portion of the intermediate portion (44) 44 and the front portion of the right outer side inclined portion 41 is an obtuse angle, which is approximately 150 degrees. The right outer side inclined portion 41 and the inner side inclined portion 31b of the right side floor side member 31 are substantially orthogonal to each other.
The front side flange 41a and the rear side flange 41b of the right outer side inclined portion 41 are joined to the lower surface of the main floor panel 10 situated on the right side in the vehicle width direction of the floor tunnel 11 by spot welding or the like. The front side flange 41a of the right outer side inclined portion 41 is arranged at an interval with respect to the front side flange 44a of the intermediate portion (44) 44. The rear side flange 41b of the right outer side inclined portion 41 is arranged at an interval with respect to the rear side flange 44b of the intermediate portion (44) 44.
The outer side portion in the vehicle width direction of the lower surface of the right outer side inclined portion 41 is provided with an outer side flange 41c extending continuously to the outer side in the vehicle width direction from the end of the lower surface. The outer side flange 41c is joined to the lower surface of the inner side inclined portion 31b of the right side floor side member 31 by spot welding or the like at welding point P15. While in Figures 2 and 3 single welding point P15 is shown, in this example, welding points are arranged at a plurality of positions at an interval with respect to the welding point P15.
On the outer side in the vehicle width direction of the rear wall of the right outer side inclined portion 41, there is provided a rear outer side flange 41e protruding from the rear wall toward the vehicle rear side, and, on the outer side in the vehicle width direction of the front wall of the right outer side inclined portion 41, there is provided a front outer side flange 41d protruding from the front wall toward the vehicle front side. The rear outer side flange 41e connects the end of the rear side flange 41b of the right outer side inclined portion 41 and the rear portion of the outer side flange 41c, and is joined to the inner wall of the right side floor side member 31. The front outer side flange 41d connects the end of the front side flange 41a of the right outer side inclined portion 41 and the front portion of the outer side flange 41c, and is joined to the inner wall of the right side floor side member 31.
As shown in Figures 2 and 3, like the right outer side inclined portion 41, the left outer side inclined portion 42 extends so as to be inclined toward the vehicle front side as it extends from the left side portion in the vehicle width direction of the intermediate portion (44) 44 toward the outer side in the vehicle width direction. The left outer side inclined portion 42 is substantially orthogonal to the inner side inclined portion 32b of the left side floor side member 32. The front side flange 42a and the rear side flange 42b of the left outer side inclined portion 42 are joined to the lower surface of the main floor panel 10 situated on the left side in the vehicle width direction of the floor tunnel 11. The front side flange 42a and the rear side flange 42b of the left outer side inclined portion 42 are arranged at an interval with respect to the front side flange 44a and the rear side flange 44b of the intermediate portion (44) 44.
Like the right outer side inclined portion 41, the left outer side inclined portion 42 is also provided with an outer side flange 42c, a rear outer side flange 42e, and a front outer side flange 42d. The outer side flange 42c is joined to the lower surface of the left side floor side member 32, and the rear outer side flange 42e and the front outer side flange 42d are joined to the inner wall of the left side floor side member 32. While Figures 2 and 3 only show welding point P16 of the outer side flange 42c and the lower surface of the left inner side inclined portion 32c, there are a plurality of other welding points at other positions.
The reinforcement 40 is endowed with a hat-like sectional shape, whereby there is formed a closed section by the reinforcement 40 and the main floor panel 10, making it possible to secure the rigidity in the longitudinal direction (the vehicle width direction) of the reinforcement 40. The right outer side inclined portion 41 and the left outer side inclined portion 42 of the reinforcement 40 and the inner inclined portions 31b and 32b of the right side and left side floor side members (31, 32) 31 and 32 are joined to each other substantially orthogonally, whereby it is possible to support the fall of the floor side members (31, 32) 31 and 32.
Furthermore, in order to mitigate the deformation of the floor tunnel 11, both sides in the vehicle width direction of the intermediate portion (44) 44 are joined to the opening edge portion of the floor tunnel 11, so that it is possible to further mitigate the deformation of the main floor panel 10, making it possible to disperse the collision load and to reduce the amplitude of the panel vibration.
In the vehicle body lower structure of the present embodiment, not only is deformation of the flat surface (the lower step surface 16 and the upper step surface 17) of the main floor panel 10 suppressed but also deformation of the floor tunnel 11 is reduced, so that it is possible to suppress deformation of the entire vehicle body lower portion. Furthermore, by reducing deformation of the floor tunnel 11, it is possible to transmit the load to the flat surface on the opposite side, with the result that the load dispersion is promoted, making it possible to reduce local deformation (stress) of the main floor panel 10 and to reduce deformation of the vehicle body as a whole.
The outer side flanges 41c and 42c of the right side and left side outer side inclined portions 41 and 42 are joined to the lower surface of the inner side inclined portions 31b and 32b of the right side and left side floor side members (31, 32) 31 and 32, so that it is possible to align the position in the vehicle up-down direction of the reinforcement 40 with that of the floor side member. As a result, the area of the closed section formed by the main floor panel 10 and the reinforcement 40 increases, and the front side flanges 41a, 42a, 44a and the rear side flanges 41b, 42b, and 44b of the reinforcement 40 effectively function as the load transmission route. Furthermore, the corner portion of the step portion 15 is a high rigidity portion less subject to the lower step surface 16 and the upper step surface 17, so that, by joining the outer side portion in the vehicle width direction of the intermediate portion (44) 44 of the reinforcement 40 to the corner portion, it is possible to further reduce deformation of the floor tunnel 11.
Furthermore, as shown in Figures 4 and 5, on the upper surface of the main floor panel 10 of the present embodiment, there is provided a first floor cross member 51 extending in the vehicle width direction. Furthermore, on the upper surface and on the vehicle rear side of the first floor cross member 51, there is provided a second floor cross member 52. The first floor cross member 51 and the second floor cross member 52 are arranged at a mutual interval with respect to each other in the vehicle front-rear direction.
As shown in Figures 4 and 5, the first floor cross member 51 has a top surface 51e, a front wall surface 51a, a rear wall surface 51b, a front side flange 51c, and a rear side flange 51d. The front wall surface 51a is erect substantially vertically with respect to the upper surface of the main floor panel 10, and extends in the vehicle width direction. The rear wall surface 51b is arranged at an interval on the vehicle rear side with respect to the front wall surface 51a, is erect substantially vertically with respect to the upper surface, and extends in the vehicle width direction. The top surface 51e connects the upper end of the front wall surface 51a and the upper end of the rear wall surface 51b. A seat bracket 53, etc. are mounted to the top surface 51e.
The front side flange 51c protrudes toward the vehicle front side from the lower end of the front wall surface 51a, and extends in the vehicle width direction. The rear side flange 51d protrudes toward the vehicle rear side from the lower end of the rear wall surface 51b, and extends in the vehicle width direction. That is, the first floor cross member 51 has a hat-like cross sectional shape.
The front side flange (front portion) 51c of the first floor cross member 51 is joined to the upper surface situated on the vehicle front side of the vertical wall surface 18 of the step portion 15, and the rear side flange (rear portion) 51d of the first cross member 51 is joined to the upper surface situated on the vehicle rear side of the rear wall surface 51b. That is, the first floor cross member 51 is joined to the upper surface of the main floor panel 10 while astride the step portion 15 in the vehicle front-rear direction.
As shown in Figure 3, the front side flange 51c of the first floor cross member 51, the rear side flanges 41b, 42b, and 44b of the reinforcement 40, and the lower step surface 16 of the main floor panel 10 are joined together threefold. In Figure 3, the position of the first floor cross member 51 is schematically indicated by the broken line.
As described above, the first floor cross member 51 is provided along the step portion 15, whereby both the reinforcement 40 and the first floor cross member 51 secure the floor rigidity. Furthermore, due to the threefold joining, it is possible to disperse the load acting on the reinforcement 40 to the step portion 15 and the first floor cross member 51. As a result, it is possible to reduce local deformation of the reinforcement 40 and to suppress deformation of the vehicle body lower portion.
As shown in Figures 2 and 3, in the present embodiment, the front cross member 25 is arranged across the floor tunnel 11. The welding points P15 and P16 (joining portions) of the outer side flanges 41c and 42c of the outer side inclined portions 41 and 42 of the reinforcement 40 and the lower surface of the floor side members (31, 32) 31 and 32 are adjacent to the welding points P17 and P18 (joining portions) at which the inner side inclined portions 31b and 32b of the floor side members (31, 32) 31 and 32 and the outer side members 27 and 28 of the front cross member 25 are welded to each other along the inclination direction of the inner side inclined portions 31b and 32b.
The reinforcing effect of the reinforcement 40 opening to the vehicle front side in vehicle top view can be augmented by the front cross member 25. Generally speaking, a welding point (joining portion) has high rigidity due to the overlapping of a plurality of members (panels).
As described above, the welding points P15 through P18 are adjacent to each other in the inclination direction, so that the rigidity of the portion around the welding points P15 through P18 is high. As a result, the reinforcing effect due to the front cross member 25 and the reinforcement 40 is enhanced. As described above, this portion undergoes deformation such that the floor side member falls and such that the lower step surface 16, etc. are distorted. The reinforcement 40 and the front cross member 25, however, can directly suppress the deformation, making it possible to further reduce deformation of the floor tunnel 11.
The present embodiment has been described by way of example in order to illustrate the present invention and does not limit the scope of the invention as described in the appended claims. Furthermore, the structure of each portion of the present invention is not restricted to that of the above-described embodiment and allows various modifications within the technical scope of the appended claims.
Although in the reinforcement 40 of the above-described embodiment the intermediate portion (44) 44, the right outer side inclined portion 41, and the left outer side inclined portion 42 are formed integrally, this should not be construed restrictively. These may be formed by different members, and may be joined together by welding or the like to form a single reinforcement 40.
Furthermore, although in the present embodiment there is described an electric automobile in which the battery is installed on the upper step surface 17 of the main floor panel 10, this should not be construed restrictively. The vehicle body lower structure of the present embodiment is also applicable to a vehicle having an engine arranged on the front side of the main floor panel 10 and between the front side members 21 and 22.
10 main floor panel;
11 floor tunnel;
15 step portion;
16 lower step surface (opening edge portion)
17 upper step surface
18 vertical wall surface
21 right side front side member
22 left side front side member
23 suspension frame
24a right side sill
24b left side sill
25 front cross member
26 central member
27 right outer side member
28 left outer side member
31 right side floor side member
31a linear portion
31b inner side inclined portion
32 left side floor side member
32a linear portion
32b inner side inclined portion
40 reinforcement
41 right outer side inclined portion
41a front side flange
41b rear side flange
41c outer side flange
41d front outer side flange
41e rear outer side flange
42 left outer side inclined portion
42a front side flange
42b rear side flange
42c outer side flange
42d front outer side flange
42e rear outer side flange
44 intermediate portion (44)
44a front side flange
44b rear side flange
51 first floor cross member
51a front wall surface
51b rear wall surface
51c front side flange
51d rear side flange
51e top surface
52 second floor cross member
53 seat bracket
P11 through P18 welding point
10 main floor panel;
11 floor tunnel;
15 step portion;
16 lower step surface (opening edge portion)
17 upper step surface
18 vertical wall surface
21 right side front side member
22 left side front side member
23 suspension frame
24a right side sill
24b left side sill
25 front cross member
26 central member
27 right outer side member
28 left outer side member
31 right side floor side member
31a linear portion
31b inner side inclined portion
32 left side floor side member
32a linear portion
32b inner side inclined portion
40 reinforcement
41 right outer side inclined portion
41a front side flange
41b rear side flange
41c outer side flange
41d front outer side flange
41e rear outer side flange
42 left outer side inclined portion
42a front side flange
42b rear side flange
42c outer side flange
42d front outer side flange
42e rear outer side flange
44 intermediate portion (44)
44a front side flange
44b rear side flange
51 first floor cross member
51a front wall surface
51b rear wall surface
51c front side flange
51d rear side flange
51e top surface
52 second floor cross member
53 seat bracket
P11 through P18 welding point
Claims (4)
- A vehicle body lower structure equipped with a main floor panel (10) arranged at a vehicle body lower portion, and floor side members (31, 32) joined to both sides in a vehicle width direction of a lower surface of the main floor panel (10),
the vehicle body lower structure being provided, in an intermediate portion (44) in the vehicle width direction of the main floor panel (10), with a floor tunnel (11) which is open to a vehicle lower side and which extends in a vehicle front-rear direction,
characterized in that each floor side member (31, 32) has a linear portion (31a, 32a) extending in the vehicle front-rear direction, and an inner side inclined portion (31b, 32b) extending so as to be inclined toward an inner side in the vehicle width direction as the inner side inclined portion (31b, 32b) extends from a front portion of the linear portion (31a, 32a) toward a vehicle front side;
on a lower surface side of the main floor panel (10), a reinforcement (40) extending in the vehicle width direction is arranged, and the reinforcement (40) has an intermediate portion (44) extending across the floor tunnel (11), and an outer side inclined portion (41, 42) extending from both side portions in the vehicle width direction of the intermediate portion (44) toward the inner side inclined portion (31b, 32b);
the intermediate portion (44) and the outer side inclined portion (41, 42) exhibit a hat-like sectional shape open to a vehicle upper side, and each of a front portion and a rear portion of the intermediate portion (44) and the outer side inclined portion (41, 42) is provided with a flange;
the flange of the intermediate portion (44) is joined to an opening edge portion (16) of the floor tunnel (11); and
an outer side portion in the vehicle width direction of the outer side inclined portion (41, 42) is provided with an outer side flange (41c, 42c) extending toward the outer side in the vehicle width direction, and the outer side flange (41c, 42c) is joined to the inner side inclined portion (31b, 32b). - The vehicle body lower structure according to claim 1, wherein the main floor panel (10) situated at a rear portion of the floor tunnel (11) is provided with a step portion (15) extending toward the vehicle upper side with respect to the opening edge portion (16) of the floor tunnel (11);
the flange of the intermediate portion (44) is joined to the opening edge portion (16) adjacent to the step portion (15); and
the outer side flange (41c, 42c) is joined to a lower surface of the inner side inclined portion (31b, 32b). - The vehicle body lower structure according to claim 2, wherein a floor cross member (51, 52) extending in the vehicle width direction is provided on an upper surface of the main floor panel (10);
a front portion of the floor cross member (51, 52) is joined to a vehicle front side of the step portion (15), and a rear portion of the floor cross member (51, 52) is joined to a vehicle rear side of the step portion (15); and
the front portion of the floor cross member (51, 52), the flange of the reinforcement (40), and the main floor panel (10) are joined together threefold. - The vehicle body lower structure according to claim 2 or claim 3, wherein on the vehicle front side of the reinforcement (40), a front cross member (25) is arranged so as to extend in the vehicle width direction across the floor tunnel (11), and the outer side portion in the vehicle width direction of the front cross member (25) is joined to the inner side inclined portion (31, 32) of the floor side member (51, 52); and
a joining portion of the outer side flange (41c, 42c) and the inner side inclined portion (31, 32) is adjacent to a joining portion of the inner side inclined portion (31, 32) and the front cross member (25).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019004564A JP7206931B2 (ja) | 2019-01-15 | 2019-01-15 | 車体下部構造 |
| JP2019-004564 | 2019-01-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR3091686A1 true FR3091686A1 (fr) | 2020-07-17 |
| FR3091686B1 FR3091686B1 (fr) | 2023-10-13 |
Family
ID=71131852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1913711A Active FR3091686B1 (fr) | 2019-01-15 | 2019-12-04 | Structure inferieure de corps de vehicule |
Country Status (4)
| Country | Link |
|---|---|
| JP (2) | JP7206931B2 (fr) |
| CN (1) | CN111434569B (fr) |
| DE (1) | DE102020200320B4 (fr) |
| FR (1) | FR3091686B1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7492682B2 (ja) | 2020-12-21 | 2024-05-30 | スズキ株式会社 | 車両下部構造 |
| JP2022171352A (ja) | 2021-04-30 | 2022-11-11 | マツダ株式会社 | 車両の下部車体構造 |
| CN113665683B (zh) * | 2021-08-27 | 2022-09-16 | 东风汽车集团股份有限公司 | 一种提升非承载式车身侧面柱形碰撞性能的车身结构 |
| CN114932956B (zh) * | 2021-08-31 | 2023-06-13 | 比亚迪股份有限公司 | 车身和具有其的车辆 |
| CN113978562B (zh) * | 2021-11-03 | 2022-10-11 | 上海研化实业有限公司 | 一种门槛梁结构 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4302505C2 (de) * | 1993-01-29 | 1998-07-30 | Daimler Benz Ag | Fahrgastzelle mit einer im Bereich der Sitze angeordneten Querversteifung |
| JP4622768B2 (ja) * | 2005-09-20 | 2011-02-02 | マツダ株式会社 | 車両の後部車体構造 |
| JP5082791B2 (ja) | 2007-11-16 | 2012-11-28 | トヨタ車体株式会社 | 自動車後部の車体下部構造 |
| JP5353372B2 (ja) | 2009-03-31 | 2013-11-27 | マツダ株式会社 | 車両の後部車体構造 |
| BR112012010801A2 (pt) | 2009-11-05 | 2016-03-29 | Honda Motor Co Ltd | estrutura de carroceria de veículo |
| US8794696B2 (en) * | 2011-01-26 | 2014-08-05 | Honda Motor Co., Ltd. | Structure for front of vehicle body |
| DE102011112180A1 (de) | 2011-09-01 | 2013-03-07 | Daimler Ag | Bodenstruktur einer Karosserie eines Personenkraftwagens |
| US9381952B2 (en) * | 2012-02-13 | 2016-07-05 | Honda Motor Co., Ltd. | Vehicle body bottom structure |
| JP6217436B2 (ja) * | 2014-02-14 | 2017-10-25 | スズキ株式会社 | 車両のフロアパネル構造 |
| JP6478011B2 (ja) * | 2014-09-24 | 2019-03-06 | 三菱自動車工業株式会社 | 車体構造 |
| JP6187487B2 (ja) * | 2015-01-21 | 2017-08-30 | マツダ株式会社 | 車両の下部車体構造 |
| JP6478031B2 (ja) | 2015-03-12 | 2019-03-06 | 三菱自動車工業株式会社 | 車体下部骨格構造 |
| JP6235621B2 (ja) * | 2016-01-12 | 2017-11-22 | 本田技研工業株式会社 | 自動車の車体構造 |
| EP3434566B1 (fr) * | 2016-03-22 | 2020-02-12 | Nissan Motor Co., Ltd. | Structure inférieure de carrosserie de véhicule |
-
2019
- 2019-01-15 JP JP2019004564A patent/JP7206931B2/ja active Active
- 2019-12-04 FR FR1913711A patent/FR3091686B1/fr active Active
-
2020
- 2020-01-09 CN CN202010020901.2A patent/CN111434569B/zh active Active
- 2020-01-13 DE DE102020200320.3A patent/DE102020200320B4/de active Active
-
2022
- 2022-12-27 JP JP2022209546A patent/JP7447980B2/ja active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111434569A (zh) | 2020-07-21 |
| JP2023024788A (ja) | 2023-02-16 |
| DE102020200320A1 (de) | 2020-07-16 |
| CN111434569B (zh) | 2022-09-02 |
| DE102020200320B4 (de) | 2021-07-29 |
| JP7206931B2 (ja) | 2023-01-18 |
| JP7447980B2 (ja) | 2024-03-12 |
| FR3091686B1 (fr) | 2023-10-13 |
| JP2020111243A (ja) | 2020-07-27 |
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