JP2019011032A - Vehicle structure - Google Patents

Abstract

To provide a vehicle structure which can adequately protect an inside of a cabin at a side collision of a vehicle such as a pole side collision while adequately reducing a weight and cost.SOLUTION: A pair of cross members 2 (2A, 2B) are respectively positioned on an upper surface side and/or a lower surface side of a floor panel 1 of a vehicle and extend in a vehicle width direction. Outer end parts in the vehicle width direction are connected to a vehicle body member 6 of a vehicle side part, and the cross members are arranged at an interval from each other in a vehicle longitudinal direction. Reinforcing members 3 (3A, 3B) are arranged in an arrangement deviated to an inner side region IR in which the pair of cross members 2 come close to each other. Each of the pair of cross members 2 has high strength in the inner side region IR than in an outer side region OR opposite to it.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle structure suitable for enhancing the safety of a passenger compartment during a vehicle side collision such as a pole side collision.

As means for increasing the strength of the vehicle body against a side collision of the vehicle, means for disposing a cross member extending in the vehicle width direction on the upper side of the vehicle floor and joining both ends of the cross member to the rocker and the floor tunnel part, respectively. (For example, refer to Patent Document 1).
According to such a configuration, it is possible to cause the cross member to receive a load input to the vehicle when a side collision of the vehicle occurs. Therefore, it is possible to suppress the vehicle side portion from being greatly deformed when the vehicle collides, and to reduce the amount of the vehicle side portion entering the vehicle interior.

  However, as one aspect of the side collision of the vehicle, there is a pole side collision in which the side surface portion of the vehicle collides with a pole-shaped barrier such as a utility pole by causing a side slip while the vehicle is traveling. In this pole side collision, compared with a general side collision, since the impact is large and the load input is concentrated in a narrow area on the side surface of the vehicle, the amount of the vehicle side portion entering the vehicle interior increases.

As a means for dealing with such a pole side collision, for example, it is conceivable to provide a plurality of cross members and increase the strength of each cross member. As means for increasing the strength of the cross member, means for setting a reinforcing member on the cross member or means for making the cross member a high-strength material such as high-strength steel can be considered.
However, in the former means, if the reinforcing members having large sizes are uniformly set for each of the plurality of cross members, the overall weight of the cross members and the reinforcing members is increased, the productivity is deteriorated, and the manufacturing cost is reduced. It becomes expensive. On the other hand, in the latter means, although the overall weight can be reduced, the material cost of the cross member becomes high, so that the manufacturing cost becomes high as in the former means.

  In Patent Document 1, one of the pair of cross members is set to be inclined obliquely with respect to the vehicle width direction so that the vehicle can cope with a side collision in the oblique direction. Has been. However, in Patent Document 1, since the outer end portions in the vehicle width direction of each of the pair of cross members are merely provided below the center pillar, the cross members are separated from each cross member in the vehicle front-rear direction. When a pole-side collision occurs at a position that is displaced, there is a problem in that the amount of the pole-shaped barrier entering the vehicle interior increases. Therefore, depending on Patent Document 1, it is difficult to appropriately solve the problems described above.

JP-A-7-89461

  The present invention has been conceived under the circumstances described above, and protects the interior of a vehicle in the event of a side collision of a vehicle such as a pole side collision while appropriately reducing weight and cost. An object of the present invention is to provide a vehicle structure capable of appropriately achieving the above.

  In order to solve the above problems, the present invention takes the following technical means.

  The vehicle structure provided by the first aspect of the present invention is located on the upper surface side and / or the lower surface side of the vehicle floor panel and extends in the vehicle width direction, and the outer end in the vehicle width direction is on the vehicle side. A vehicle comprising: at least a pair of cross members coupled to a vehicle body member of a portion and provided in an arrangement spaced apart from each other in a vehicle longitudinal direction; and a reinforcing member for reinforcing the pair of cross members, respectively. In the structure, the reinforcing member is provided so as to be biased toward an inner region where the pair of cross members approach each other, and each of the pair of cross members is opposite to the inner region. It is characterized by having a higher strength than the outer region.

According to such a configuration, since at least a pair of cross members are arranged at intervals in the vehicle front-rear direction, it is of course possible to increase the strength of the place where each of these cross members is arranged. In addition, the following effects can be obtained.
First, as can be understood from the description of FIG. 5 and FIG. 7 described later, a pole-side collision occurs, and the pole-shaped barrier is between the pair of cross members among the vehicle body members on the vehicle side portion. In the case of a collision with a position, in the initial stage of the collision, it is possible to appropriately receive a collision load without causing a cross-sectional collapse of each of the pair of cross members due to the reinforcing effect of the reinforcing member. In the middle and late stages of the collision, when the pole-shaped barrier enters the vehicle compartment, the pair of cross members are It is possible to deform so as to receive the collision load evenly, so that buckling deformation or a large bending deformation close to this does not easily occur. For this reason, the effect of reducing the amount of the pole-like barrier entering the vehicle interior can be obtained.
Second, since the reinforcing member is provided in the inner region of the pair of cross members, the size of the reinforcing member can be reduced as compared with the case where the reinforcing members are set substantially uniformly over the entire area of each cross member. And weight reduction. Accordingly, it is possible to reduce the weight of the entire vehicle, improve productivity, and reduce manufacturing costs.

  The vehicle structure provided by the second aspect of the present invention is a vehicle structure provided with a floor panel disposed at the lower part of the passenger compartment, and is provided on the floor panel and is closer to the outside in the vehicle width direction. When there is a load input that compresses and deforms the floor panel from the outer side in the vehicle width direction, with the portion recessed inward in the vehicle width direction in a plan view and projecting downward or upward in the vehicle height direction Further, the present invention is further characterized by further including a deformation guiding portion that can be deformed so as to project the floor panel downward or upward.

According to such a configuration, the following effects can be obtained.
First, as will be understood from the description of FIG. 10 and the like described later, when the pole side collision occurs and the floor panel is compressively deformed due to the load input from the vehicle outer side, the above-described deformation induction is performed. Due to the action of the part, the floor panel is deformed so as to protrude in the same direction as the direction in which the deformation guiding part protrudes, either below or above in the vehicle height direction. Therefore, when there is an occupant on the floor panel or there is a battery or other device for which it is desired to avoid a strong impact, the floor panel is deformed so as to protrude downward. It is possible to avoid a strong collision with passengers or equipment. On the other hand, when a device such as a battery is present on the lower side of the floor panel, the deformation guiding portion is formed in an upward projecting shape, and the floor panel is compressed and deformed in an upward projecting shape. It is possible to prevent the panel from colliding strongly with the device. Therefore, it is possible to improve the safety in the passenger compartment.
Second, the above-described deformation guiding portion can be manufactured relatively easily, for example, by pressing a part of the floor panel, and it is not necessary to separately provide a dedicated member. Further, it is possible to eliminate or reduce the need for using a strong reinforcing member. Therefore, it is possible to suitably reduce the manufacturing cost by reducing the weight of the vehicle and improving the productivity.

In this invention, it can be set as the structure which combined the vehicle structure provided by each of the 1st and 2nd side surface of this invention.
Specifically, in the vehicle structure provided by the first aspect of the present invention, the floor panel is provided in a region between the pair of cross members, and the vehicle width direction outward portion is a flat surface. When a load is input that compresses and deforms the floor panel from the outer side in the vehicle width direction, the floor panel protrudes downward or upward in the vehicle height direction so as to be recessed inward in the vehicle width direction. It can be set as the structure further provided with the deformation | transformation induction | guidance | derivation part which can be deform | transformed so that a panel may protrude below or upwards.

  According to such a configuration, in addition to obtaining an effect due to the reinforcing members being provided in an offset arrangement in the inner region of the pair of cross members, the floor panel includes a pair of cross members between each other. The floor panel can be deformed so as to protrude upward or downward in the event of a side collision of the vehicle such as a pole side collision by the action of a predetermined deformation guide provided in the region, which is great for equipment such as passengers or batteries. It is possible not to give an impact. It is possible to appropriately avoid problems such as a large increase in weight and a significant increase in manufacturing cost.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

(A) is explanatory drawing which shows typically schematic structure of planar view of the vehicle structure which concerns on this invention, (b) is sectional drawing which shows schematic structure of front sectional view of the vehicle structure shown to (a) It is sectional drawing of the location equivalent to the Ib-Ib line | wire of (a). It is a principal part schematic perspective view which shows the area | region shown by code | symbol II of Fig.1 (a). It is a disassembled perspective view which shows one of a pair of cross member shown in FIG. 2, and its reinforcement member. (a) is IVa-Iva sectional drawing of FIG. 2, (b) is IVb-IVb sectional drawing of FIG. (A), (b) is plane explanatory drawing which shows typically the effect | action of the vehicle structure shown in FIG.1 and FIG.2. It is sectional drawing which shows the proportionality (1st proportionality) with this invention. FIG. 7 is an explanatory plan view schematically showing a first proportional action shown in FIG. 6. It is sectional drawing which shows the contrast (2nd proportionality) with this invention. (A) is a fragmentary fragmentary principal part perspective view which shows the other example of the vehicle structure which concerns on this invention, (b) is a principal part top view of (a), (c) is (b) ) Is an IXc-IXc cross-sectional view, (d) is an IXd-IXd cross-sectional view of (b), and (e) is an IXe-IXe cross-sectional view of (b). (A) is a principal part top view which shows the effect | action of the vehicle structure shown in FIG. 9, (b) is principal part sectional drawing which shows the effect | action of the vehicle structure shown in FIG. (A) is principal part sectional drawing which shows the comparison (3rd proportionality) with this invention, (b) is principal part sectional drawing which shows the effect | action of (a). It is principal part sectional drawing which shows the other example of the vehicle structure which concerns on this invention.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

[First Embodiment]
The vehicle structure A shown in FIG. 1 is provided with a total of two pairs, one on each side of the floor panel 1 and the floor tunnel portion 10 in the center of the vehicle width direction of the floor panel 1 (up and down in FIG. 1A). A cross member 2 (2A, 2B), a reinforcing member 3 (3A, 3B) for reinforcing the cross member 2, and a seat slide rail 5 for mounting the vehicle seat 4 are provided.
Both outer edges in the vehicle width direction of the floor panel 1 are joined to a rocker 6 extending in the vehicle front-rear direction. In FIG. 1, reference numerals 60a and 60b denote front pillars and center pillars, respectively, and reference numeral 61 denotes a side door.

  Each cross member 2 is a so-called hat-shaped member having a cross-sectional shape as shown in FIG. Preferably, as shown well in FIG. 3, one or a plurality of joining flange portions 28a and 28b are connected to both ends of each cross member 2 in the longitudinal direction. Each cross member 2 is set on the upper surface side of the floor panel 1 so as to extend in the vehicle width direction. The outer end portion in the vehicle width direction of the cross member 2 is joined to the side surface portion of the rocker 6, and the inner end portion in the vehicle width direction is joined to the side wall portion of the floor tunnel portion 10. Such joining of the cross member 2 is achieved by, for example, spot welding the joining flange portions 28a and 28b. A pair of flange wall portions 2 c below the cross member 2 is welded to the floor panel 1. Preferably, these weldings are performed simultaneously with the joining flange portions 38a and 38b and the lower plate portion 3c provided on the reinforcing member 3, as will be described later.

  The pair of cross members 2A and 2B are arranged in a substantially parallel arrangement with an appropriate interval in the vehicle longitudinal direction. Preferably, one cross member 2B is disposed so as to substantially overlap the center pillar 60b in the vehicle front-rear direction, and the other cross member 2A is positioned further forward than that. On the pair of cross members 2A and 2B, the seat slide rail 5 is mounted in a state of being straddled.

  In FIG. 4, the reinforcing member 3 is made of, for example, a sheet metal, and the main plate portion 3 a that is overlaid on the inner side and / or the lower side of the standing wall portion 2 a, the upper wall portion 2 b, and the flange wall portion 2 c of the cross member 2 It is the structure which provided the board part 3b and the lower board part 3c, and these were connected integrally. At both ends in the longitudinal direction (both ends in the vehicle width direction) of the reinforcing member 3, joining flange portions 38 a and 38 b are provided, and these are overlapped with the joining flange portions 28 a and 28 b of the cross member 2. FIG. 4B shows a structure in which the joining flange portions 28 a and 38 a overlap each other. This portion is welded to the rocker 6 at the same time. The other joining flange portions 28b and 38b are also welded to the floor tunnel portion 10 in the same manner as described above. The flange wall portion 2c and the lower plate portion 3c are simultaneously welded to the floor panel 1 in a state where they overlap each other.

  2 and 4A, the pair of cross members 2A and 2B are not configured such that each part is reinforced evenly by the reinforcing member 3, and each other in the vehicle front-rear direction. The reinforcing member 3 is set in the approaching inner region IR, whereas the reinforcing member 3 is not set in the outer region OR opposite to the inner region IR. Thus, each of the pair of cross members 2A and 2B has higher strength in the inner region IR than in the outer region OR.

  Next, the operation of the vehicle structure A will be described.

  In the structure in which the pair of cross members 2 (2A, 2B) is provided at an interval in the vehicle front-rear direction, the portion of the vehicle side portion where the cross member 2 is actually disposed and the vicinity thereof. The portion corresponding to the substantially center between the pair of cross members 2A and 2B has a lower strength against the side impact load. Therefore, when a pole side collision occurs in such a portion, it is required that the vehicle side portion does not greatly enter the vehicle interior.

  Therefore, as schematically shown in FIG. 5A, a case where the pole-shaped barrier PB collides with the position between the pair of cross members 2 (2A, 2B) in the rocker 6 will be considered below. To do.

  First, since the strength of each cross member 2 is increased by the reinforcing member 3 in the initial stage of the pole side collision, each cross member 2 does not cause a cross-sectional collapse, and the collision load with the pole-shaped barrier PB is applied. It becomes possible to receive appropriately. Next, as shown in FIG. 5 (b), when the pole-shaped barrier PB enters the vehicle interior side in the middle / late stage of the pole side collision, the reinforcing member 3 is placed in the inner region IR of the pair of cross members 2. Due to the action provided by the biased arrangement, the pair of cross members 2 are deformed so as to receive the collision load evenly. It is possible to prevent each cross member 2 from easily buckling deformation or a large bending deformation close thereto, and to effectively maintain a so-called tension force with respect to the load input of each cross member 2. As a result, an effect of reducing the amount of the rocker 6 and the pole-shaped barrier PB entering the vehicle interior can be obtained.

FIG. 6 shows the proportionality (first proportionality) with the present invention. In this first proportionality, the reinforcing member 91 is set only in the outer region OR of the pair of cross members 2. In this first proportionality, the strength of the inner region IR of the cross member 2 is low. Therefore, in the initial stage of the pole side collision shown in FIG. It is likely to occur. Further, in the middle and late stages of the pole side collision shown in FIG. 7B, since the strength of the inner region IR of the cross member 2 is small, each cross member 2 is shaped like a square in a plan view in a buckling deformation mode. Large and sharply bent. Therefore, the amount of entry of the rocker 6 and the pole-shaped barrier PB into the vehicle interior is large.
On the other hand, according to the vehicle structure A of the present embodiment, it is possible to appropriately prevent the phenomenon that occurs in the first comparative proportion, and that the rocker 6 and the pole-shaped barrier PB enter the vehicle interior. It is possible to prevent more effectively than the first proportionality.

FIG. 8 shows the second proportionality of the present invention. In this second proportionality, the reinforcing member 92 is provided so as to reinforce substantially the entire area of the cross member 2 in the vehicle front-rear direction, and is not set to be disposed in either direction in the vehicle front-rear direction. . Therefore, according to this second proportionality, it is possible to sufficiently increase the mechanical strength of the cross member 2 and obtain an action shown in FIG. 5 or an action close thereto. However, according to the second proportionality, the size of the reinforcing member 92 increases and the overall weight increases.
On the other hand, according to the vehicle structure A of the present embodiment, the size and weight of the reinforcing member 3 can be reduced and the manufacturing cost of the vehicle can be reduced as compared with the second comparative reinforcing member 92. is there.

  As described above, according to the present embodiment, it is possible to give the vehicle body strength that can cope with the pole side collision while reducing the cost while preventing the size and weight of the reinforcing member 3 from being increased as much as possible. It is extremely useful. Of course, it is possible to have excellent strength against normal side collisions other than pole side collisions.

[Second Embodiment]
9 and 10 show a second embodiment of the vehicle structure according to the present invention. In the drawings after FIG. 9, the same or similar elements as those in the first embodiment described above are denoted by the same reference numerals as those in the first embodiment, and redundant description is omitted.

In the vehicle structure Aa shown in FIG. 9, a convex deformation guide portion 7 protruding downward is provided in a region between the pair of cross members 2 in the floor panel 1. A battery 8 is disposed on the floor panel 1 on the inner side in the vehicle width direction than the deformation guide portion 7. This battery 8 is for an ISG hybrid system, for example.

  As will be described later, the deformation guide portion 7 is a portion that guides the floor panel 1 to be deformed downward during a side collision of the vehicle, and is formed by pressing the floor panel 1. The deformation guiding portion 7 is basically a convex surface as a bead portion that protrudes downward so that the upper surface side of the floor panel 1 is depressed. This is a form in which a recessed portion 70 that is recessed inward is provided.

  More specifically, the deformation guide portion 7 in the present embodiment is roughly formed in a downwardly projecting pyramid shape or a form close thereto, and as described above, it is closer to the outside in the vehicle width direction. The concave portion 70 described above is provided in the portion. In FIG. 9 (b), reference characters La to Le indicate the outlines of the deformation guiding portion 7. The regions inside these outlines La to Le are triangular inclined wall regions 7a to 7c ( One inclined wall region 7a and a pair of inclined wall regions 7b and 7c) are connected in a valley fold shape via ridge lines 71a to 71e. The concave portion 70 described above is a region between a pair of inclined wall regions 7c located outward in the vehicle width direction.

  In the vehicle structure Aa of the present embodiment, the following operation is obtained.

  That is, when a pole-side collision of the vehicle occurs and the pole-shaped barrier PB collides with the region between the pair of cross members 2 of the rocker 6, for example, as shown in FIG. The collision load is input, and the deformation guide portion 7 is compressed and deformed inward in the vehicle width direction. However, since the deformation | transformation induction | guidance | derivation part 7 is a downward convex surface shape, when compressively deforming, it inherently tends to protrude below. In addition, a concave portion 70 is provided on the outer side in the vehicle width direction of the deformation guide portion 7 on the outer side in the vehicle width direction that receives the load most directly from the pole-shaped barrier PB, and a pair forming the concave portion 70 is formed. Since the inclined wall region 7c protrudes downward with a steep slope and faces the vehicle width direction, it is further promoted that the deformation guiding portion 7 and its peripheral portion protrude downward. As a result, for example, as shown in FIG. 10 (b), the mode of compressive deformation of the floor panel 1 in the middle and later stages of the pole-side collision is a mode in which the floor panel 1 is folded so as to protrude downward.

  FIG. 11 shows the proportionality (third proportionality) with the present embodiment. In this comparison, as shown in FIG. 5A, the floor panel 1 is not provided with means corresponding to the deformation guiding portion 7 described above. For this reason, at the time of a pole side collision, as shown in the figure (b), possibility that the floor panel 1 will compress-deform so that it may protrude up and down is high. When such compressive deformation occurs, the portion deformed so as to protrude upward from the floor panel 1 may collide strongly with the battery 8.

  On the other hand, according to the present embodiment, unlike the comparative example described above, the floor panel 1 is compressed and deformed so as not to protrude upward, so that the compression deformed portion of the floor panel 1 strongly collides with the battery 8. There is no fear. Therefore, the battery 8 can be protected.

[Third Embodiment]
In the vehicle structure Ab shown in FIG. 12, the battery 8 is disposed below the floor panel 1. On the other hand, the deformation guide portion 7A is provided in a form protruding upward from the floor panel 1. Specifically, the deformation guiding portion 7A has the same configuration as that obtained by vertically inverting the deformation guiding portion 7 shown in FIG.

According to this embodiment, when a pole side collision of the vehicle occurs and the floor panel 1 is compressed and deformed due to a load input from the outside of the vehicle, for example, as shown by the phantom line in FIG. Compressed and deformed to protrude. Therefore, it is possible to appropriately avoid the floor panel 1 from strongly colliding with the battery 8 and protect the battery 8.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the vehicle structure according to the present invention can be modified in various ways within the intended scope of the present invention.

  In the first embodiment described above, the cross member is disposed between the floor tunnel portion and the rocker, and both ends are connected to these portions, but the present invention is not limited to this. For example, it is also possible to adopt a configuration in which the cross member extends in a series from one to the other of a pair of rockers located on both sides of the vehicle, and both ends of the cross member are connected to the pair of rockers. Further, the cross member may be provided on the lower surface side of the floor panel instead of the configuration provided on the upper surface side of the floor panel. The specific shape, size, and material of the cross member are not limited, and instead of a cross-sectional hat shape, for example, a pipe shape such as a round pipe or a square pipe, or a shape similar to a grooved steel or an angle steel It is also possible. It is sufficient that at least one pair of cross members is provided. As the cross members provided on the vehicle body, a larger number (3 or more) can be provided in parallel. When three or more cross members are provided, if at least two of these cross members have a configuration corresponding to a pair of cross members in the present invention, they are included in the technical scope of the present invention. It becomes.

  The specific configuration of the reinforcing member that reinforces the cross member can be appropriately changed according to the shape of the cross member and the like, and can be other than a bent plate shape. A plurality of reinforcing members may be set for one cross member, and the specific number thereof is not limited. In the above-described embodiment, the reinforcing member is provided only in the inner region of the pair of cross members and the reinforcing member is not provided in the outer region, but the present invention is not limited to this. For example, means such as providing a small reinforcing member in the outer region may be employed. Even in this case, when the present invention has the intended effect, it is included in the technical scope of the present invention.

In the second and third embodiments described above, the illustration is omitted, but the pair of cross members 2 includes a reinforcing member similar to the reinforcing member 3 (3A, 3B) of the first embodiment. It has been configured. However, the means for providing the deformation guiding portion of the present invention can be widely applied to a vehicle structure that does not include the pair of cross members 2 provided with such a reinforcing member 3.
The deformation inducing portion referred to in the present invention does not necessarily have to be a pyramid shape or a form close to this, and other forms are also possible. The point is that it is provided on at least a part of the floor panel and has a convex shape that protrudes downward or upward in the vehicle height direction so that the outer side portion in the vehicle width direction is recessed inward in the vehicle width direction in plan view. In addition, when there is a load input that compresses and deforms the floor panel from the outer side in the vehicle width direction, it is only necessary that the floor panel can be deformed so as to protrude downward or upward. The specific area of the deformation guiding portion, the protruding dimension upward or downward of the floor panel, and the like are not limited.

A, Aa, Ab Vehicle structure IR Inner region OR Outer region 1 Floor panel 2 (2A, 2B) Cross member 3 (3A, 3B) Reinforcement member 6 Rocker (vehicle body member)
7, 7A Deformation induction part 8 Battery

Claims (3)

Each is located on the upper surface side and / or lower surface side of the vehicle floor panel and extends in the vehicle width direction, and the outer end portion in the vehicle width direction is connected to the vehicle body member on the vehicle side portion, and is spaced from each other in the vehicle longitudinal direction. At least a pair of cross members provided in a spaced arrangement;
A reinforcing member for reinforcing each of the pair of cross members;
A vehicle structure comprising:
The reinforcing member is provided in an arrangement biased toward the inner region where the pair of cross members approach each other, and each of the pair of cross members has an inner region more than an outer region opposite to the inner region. A vehicle structure characterized by high strength. The vehicle structure according to claim 1,
Of the floor panel, provided in a region between the pair of cross members, and an outwardly outward portion in the vehicle width direction is recessed downward or upward in the vehicle height direction so as to be recessed inward in the vehicle width direction in plan view. A deformation guiding portion that has a projecting convex shape and can be deformed so as to project the floor panel downward or upward when there is a load input that compressively deforms the floor panel from the outer side in the vehicle width direction. The vehicle structure further comprising: A vehicle structure comprising a floor panel disposed at the lower part of the passenger compartment,
It is provided on the floor panel and has a convex shape projecting downward or upward in the vehicle height direction so that the vehicle width direction outward portion is recessed in the vehicle width direction in plan view, and the vehicle width direction outward side The vehicle is further provided with a deformation guiding portion that can be deformed so that the floor panel protrudes downward or upward when there is a load input that compressively deforms the floor panel. Construction.

Images