JP6911776B2 - Body front structure - Google Patents

Description

The present invention relates to a vehicle body front structure.

Patent Document 1 discloses a steering support structure having a pedal bracket supported by a dash lower panel and a bending link rotatably connected to the pedal bracket and the steering column.

Japanese Unexamined Patent Publication No. 01-195176

An insertion hole through which a part of the steering device is inserted is formed in the dash panel that separates the passenger compartment and the front compartment having the front unit, which is arranged on the front side in the front-rear direction of the vehicle from the passenger compartment. There is a vehicle body front structure in which a cover member is joined around the insertion hole in the dash panel so as to cover a part of the insertion hole and the steering device. In this vehicle body front structure, the distance between the front unit and the cover member is narrower than the distance between the front unit and the dash panel. For this reason, when the front unit and the cover member come into contact with each other during a frontal collision of the vehicle, the peripheral portion of the insertion hole in the dash panel is more likely to be deformed toward the passenger compartment side as compared with the configuration without the cover member. .. That is, in a configuration in which a cover member that covers a part of the steering device inserted through the insertion hole of the dash panel is joined to the dash panel, it is possible to prevent the peripheral portion of the insertion hole from being deformed toward the passenger compartment in the event of a frontal collision. There is room for improvement.

In consideration of the above facts, the present invention has a configuration in which a cover member covering a part of the steering device inserted through the insertion hole of the dash panel is joined to the dash panel, and the peripheral portion of the insertion hole is on the passenger compartment side at the time of a frontal collision. The purpose is to obtain a vehicle body front structure that can suppress deformation to.

In the vehicle body front structure according to the present invention according to claim 1, an insertion hole through which a part of the steering device is inserted and a jointed portion around the insertion hole are formed, and the vehicle interior and the vehicle interior are more than the vehicle interior. A dash panel arranged on the front side in the vehicle front-rear direction and partitioning a front chamber having a front unit, and a dash panel arranged on the rear side in the vehicle front-rear direction with respect to the front unit, and from the front unit side to the jointed portion. It has a cover member that covers a part of the steering device by being joined, and at least a part of the jointed portion is convex toward the outside of the passenger compartment before a collision load is input. It has a curved shape that becomes convex when a collision load is input, and is deformed so as to be convex toward the passenger compartment side.

In the vehicle body front structure according to the first aspect of the present invention, when a collision load is input to the vehicle body front portion at the time of a frontal collision and the front unit comes into contact with the cover member, the jointed portion is removed from the cover member. The collision load is transmitted to the dash panel via. Here, the jointed portion is deformed so as to be convex toward the vehicle interior side, so that the peripheral portion of the insertion hole in the dash panel is moved to the front side of the vehicle as compared with that before the frontal collision. As a result, it is possible to prevent the peripheral portion of the insertion hole from being deformed toward the vehicle interior side at the time of a frontal collision.

As described above, according to the vehicle body front structure according to claim 1, in a configuration in which a cover member covering a part of the steering device inserted through the insertion hole of the dash panel is joined to the dash panel, a frontal collision occurs. Occasionally, it has the effect of suppressing the peripheral portion of the insertion hole from being deformed toward the vehicle interior side.

It is a block diagram which shows a part of the vehicle to which the vehicle body front structure which concerns on this embodiment is applied. It is a block diagram which looked at the car body front structure which concerns on this Embodiment from the vehicle width direction. (A) It is explanatory drawing which shows a part of the dash panel which concerns on this Embodiment, and (B) is is an explanatory view which shows the cover member which concerns on this Embodiment. It is sectional drawing of the front part structure of the vehicle body which concerns on this embodiment. (A) is an explanatory view showing a state at the time of a frontal collision in the vehicle body front structure according to the present embodiment, and (B) is an explanatory view showing a state immediately after a frontal collision in the vehicle body front structure according to the present embodiment.

〔overall structure〕
The vehicle body front structure 30 of the present embodiment shown in FIG. 1 will be described. The arrow FR appropriately shown in each figure indicates the front of the vehicle (traveling direction), the arrow UP indicates the upper part of the vehicle, and OUT indicates the outside in the vehicle width direction. Hereinafter, when the explanation is simply made using the front-rear, up-down, and left-right directions, unless otherwise specified, the front-rear direction of the vehicle front-rear direction, the up-down direction of the vehicle up-down direction, and the left-right direction of the vehicle width direction when facing the traveling direction are shown. Shall be.

The vehicle 10 has a vehicle body 12 including a floor tunnel 16, a floor panel 17, a front side member 19, a kick reinforcement 29 (see FIG. 4), and a vehicle body front structure 30 described later. The vehicle body 12 is formed with a passenger compartment 13 in which an occupant (not shown) is present, and an engine compartment 14 as an example of the front compartment. The vehicle 10 is, as an example, a left-hand steering wheel vehicle.

The floor tunnel 16 is formed by pressing a steel plate, and constitutes a central portion of the floor portion of the vehicle 10 in the vehicle width direction. Further, the shape of the floor tunnel 16 is a cross-sectional hat shape that opens to the lower side of the vehicle when viewed from the front-rear direction of the vehicle. The floor panel 17 is formed by pressing a steel plate. Further, the floor panel 17 is joined to both ends of the floor tunnel 16 and extends in the vehicle front-rear direction and the vehicle width direction to form the floor portion of the vehicle 10.

The engine compartment 14 is arranged on the front side of the vehicle interior 13 in the front-rear direction of the vehicle. Further, the engine compartment 14 has a power unit 18 as an example of a front unit configured including an engine, a motor, and the like. The front side members 19 are arranged on both sides in the vehicle width direction with respect to the power unit 18 and extend in the vehicle front-rear direction. The power unit 18 is supported by the front side member 19 via a mount bracket (not shown). Further, the vehicle 10 is provided with a steering device 20 as an example of the steering device.

The steering device 20 includes a steering wheel, a steering column, and a steering shaft (not shown), an intermediate shaft 22, a shaft connecting portion 24, and a gear box 26.

The intermediate shaft 22 is an example of a part of the steering device, and is connected to a front end portion of a steering shaft (not shown) in the vehicle front-rear direction. Further, the intermediate shaft 22 is provided so as to be rotatable about an oblique direction in which the front end portion is located on the lower side of the vehicle with respect to the rear end portion when viewed from the vehicle width direction. The front portion of the intermediate shaft 22 is inserted into an insertion hole 36 described later. Further, the front end portion of the intermediate shaft 22 is connected to the gear box 26 via the shaft connecting portion 24. The gearbox 26 is configured to steer wheels (not shown).

[Main part composition]
The vehicle body front structure 30 shown in FIG. 1 has a dash panel 32 and a cover member 34.

<Dash panel>
The dash panel 32 is formed by pressing a steel plate. Further, the dash panel 32 extends in the vehicle width direction and the vehicle vertical direction with the vehicle front-rear direction as the thickness direction. Both ends of the dash panel 32 in the vehicle width direction are joined to front pillars (not shown). The lower end of the dash panel 32 is joined to the front end of the floor tunnel 16 and the front end of the floor panel 17. The upper end of the dash panel 32 is joined to the lower surface side of the cowl arranged in the vehicle width direction along the lower edge of the windshield glass (not shown). As a result, the dash panel 32 separates (divides) the vehicle interior 13 and the engine compartment 14.

As shown in FIG. 2, as an example, when viewed from the vehicle width direction, the dash panel 32 is continuous with the upper portion 32A along the substantially vertical direction of the vehicle and the lower end of the upper portion 32A from the lower end to the lower side, and the lower side is higher than the upper side. It has a lower portion 32B formed so as to be located on the rear side of the vehicle. Specifically, the lower portion 32B has a curved surface shape that is convex toward the front side and the lower side (obliquely lower side) when viewed in an enlarged manner from the vehicle width direction.

When the dash panel 32 shown in FIG. 1 is viewed from the front-rear direction of the vehicle, an insertion hole penetrating the lower portion 32B in the front-rear direction of the vehicle is provided on one side (driver's seat side) of the dash panel 32 in the vehicle width direction with respect to the floor tunnel 16. 36 is formed. The insertion hole 36 has a size and shape capable of inserting the intermediate shaft 22. In the state where the intermediate shaft 22 is inserted into the insertion hole 36, the hole wall of the insertion hole 36 and the intermediate shaft 22 are not in contact with each other.

A jointed portion 38 is formed around the insertion hole 36 in the dash panel 32 shown in FIG. 3 (A). In FIG. 3A, the range corresponding to the joined portion 38 in the dash panel 32 is the large alternate long and short dash line K2 outside the small alternate long and short dash line K1 surrounding the insertion hole 36. It is the inner range. The two-dot chain lines K1 and K2 correspond to the inner edge and the outer edge of the peripheral wall portion 46 (see FIG. 3B) of the cover member 34, which will be described later.

Further, the jointed portion 38 is set as a portion outside the edge of the insertion hole 36 (the side away from the insertion hole 36) in the front view of the vehicle. In other words, the jointed portion 38 is a peripheral portion of the insertion hole 36 excluding the edge (hole wall) of the insertion hole 36, and is in contact with the peripheral wall portion 46 (see FIG. 3B) of the cover member 34 described later. It means the part to be done. That is, the jointed portion 38 includes not only a portion (dotted portion) where the cover member 34 is joined (welded as an example) in the dash panel 32, but also a portion that comes into contact with the cover member 34 by joining.

The portion of the dash panel 32 that includes the edge of the insertion hole 36 and that the cover member 34 does not contact on the insertion hole 36 side of the jointed portion 38 is referred to as a peripheral portion 39, and the jointed portion 38 is referred to as a peripheral portion 39. Distinguish. The range of the peripheral portion 39 is outside (including the edge) of the insertion hole 36 shown in FIG. 3 (A) and inside of the alternate long and short dash line K1. In this embodiment, the alternate long and short dash line K1 is included in the peripheral portion 39.

FIG. 4 shows a flat cross section of the vehicle body front structure 30 when the insertion hole 36 is cut at a height substantially central to the vehicle in the vertical direction. As an example, the peripheral portion 39 extends in a flat plate shape along the vehicle width direction. The jointed portion 38 is formed on one side and the other side in the vehicle width direction with respect to the peripheral portion 39 in the dash panel 32. One side (floor tunnel 16 side) in the vehicle width direction is referred to as a jointed portion 42, and the other side (outside) is referred to as a joined portion 44 for distinction.

The jointed portion 42 is a curved surface that is convex toward the outside of the vehicle interior 13 when viewed from the vertical direction of the vehicle in a state (stopped state) before the collision load of a frontal collision is input to the vehicle 10. It has a shape. Specifically, the jointed portion 42 is curved so as to be convex in the diagonal direction (direction indicated by the arrow A1) located on the center side in the vehicle width direction toward the front of the vehicle. Further, the jointed portion 42 is formed so as to be deformed (warped) so as to be convex toward the vehicle interior 13 side when the collision load of the frontal collision is input in the thickness direction. In other words, the jointed portion 42 is formed so as to be able to warp (back ring) in the input direction of the collision load when the collision load is input in the thickness direction.

The jointed portion 44 is arranged closer to the front side member 19 than the joined portion 42 in the vehicle width direction. Further, the jointed portion 44 has a curved surface shape that is convex toward the outside of the vehicle interior 13 when viewed from the vertical direction of the vehicle in a state before the collision load of the frontal collision is input to the vehicle 10. Have. Specifically, the jointed portion 44 is curved so as to be convex in an oblique direction (direction indicated by an arrow A2) located outside in the vehicle width direction toward the front of the vehicle. Further, the jointed portion 44 is formed so as to be deformed (warped) so as to be convex toward the vehicle interior 13 side when the collision load of the frontal collision is input in the thickness direction. In other words, the jointed portion 44 is formed so as to be able to warp (back ring) in the input direction of the collision load when the collision load is input in the thickness direction.

Here, as described above, the lower portion B of the dash panel 32 has a curved surface shape that becomes convex diagonally downward when viewed from the vehicle width direction. That is, the shapes of the jointed portion 42 and the joined portion 44 are not only curved in the planosection along the vehicle front-rear direction and the vehicle width direction, but also in the vehicle front-rear direction and the vehicle vertical direction. It has a curved shape even within the vertical cross section along the line.

<Cover member>
As an example, the cover member 34 shown in FIG. 3B has a peripheral wall portion 46 joined to the bonded portion 38 (see FIG. 3A) and a bulging portion 48 bulging from the peripheral wall portion 46. Have.

The peripheral wall portion 46 is formed in a plate shape with the vehicle front-rear direction as the thickness direction and in a frame shape when viewed from the vehicle front-rear direction. When viewed from the front-rear direction of the vehicle, an opening 47 penetrated in the front-rear direction of the vehicle is formed inside the peripheral wall portion 46. The size of the opening 47 is the size through which the intermediate shaft 22 (see FIG. 1) is inserted, and is larger than the size of the insertion hole 36 (see FIG. 3 (A)). Further, the opening 47 is arranged along the insertion hole 36 along the axial direction of the intermediate shaft 22.

As shown in FIGS. 2 and 4, when the peripheral wall portion 46 is overlapped with the jointed portion 38 from the front side in the front-rear direction of the vehicle, the peripheral wall portion 46 faces the outside of the vehicle interior 13 so as to make surface contact with the joined portion 38. It has a curved surface shape that is convex. In other words, the peripheral wall portion 46 has a curved surface shape that is convex toward the outside of the vehicle interior 13 in both cases when viewed from the vehicle vertical direction and when viewed from the vehicle width direction.

The bulging portion 48 shown in FIG. 3B is formed so as to bulge from the inner edge of the peripheral wall portion 46 toward the front side of the vehicle with respect to the peripheral wall portion 46 and substantially cover the opening 47 when viewed from the front side of the vehicle. There is. An opening 49 that opens toward the lower side of the vehicle is formed at the lower end of the bulging portion 48.

Here, as shown in FIG. 4, the cover member 34 is arranged on the rear side in the vehicle front-rear direction with respect to the power unit 18, and is joined (welded as an example) to the jointed portion 38 from the power unit 18 side. It covers a part of the steering device 20. As shown in FIG. 2, the bulging portion 48 is a portion of the power unit 18 above the center in the vertical direction of the vehicle and the front and rear of the vehicle when viewed from the vehicle width direction in a state of being joined to the dash panel 32. They are arranged so as to face each other with an interval d1 in the direction.

[Action and effect]
Next, the operation and effect of the vehicle body front structure 30 of the present embodiment will be described.

As shown in FIG. 4, before the frontal collision of the vehicle 10 (during normal driving), in the passenger compartment 13, the occupant P sits on a seat (not shown) and steers the steering device 20. Note that FIG. 4 shows, as an example, a state in which the right foot PF of the occupant P is arranged on the rear side of the vehicle with respect to the insertion hole 36.

At the time of a frontal collision of the vehicle 10 shown in FIG. 5A, the power unit 18 is displaced to the rear side of the vehicle from the original position, and the power unit 18 and the cover member 34 (bulging portion 48) come into contact with each other. In this case, the collision load F is transmitted from the cover member 34 to the dash panel 32 via the jointed portion 38. Specifically, the collision loads F1 and F2 toward the vehicle interior 13 side are transmitted from the peripheral wall portion 46 to the jointed portions 42 and 44.

As shown in FIG. 5B, the collision loads F1 and F2 are transmitted to the jointed portions 42 and 44, so that the joined portion 42 and the joined portion 44 are convex toward the vehicle interior 13 side. (It warps in the input direction of the collision loads F1 and F2). This is because the upper end portion, the lower end portion, and the left and right end portions of the dash panel 32 are joined to other members to resist the load, so that when a collision load acts on the joined portion 38. , The entire dash panel 32 is suppressed from being displaced toward the rear side of the vehicle. On the other hand, since the local collision loads F1 and F2 are input to the jointed portion 38, the joined portion 38 made of sheet metal cannot withstand the collision loads F1 and F2 and is deformed to the vehicle interior 13 side. Will be done. Due to these actions, the jointed portion 42 and the joined portion 44 are deformed (curved) toward the vehicle interior 13 side.

By deforming the jointed portion 42 and the joined portion 44 so as to be convex toward the vehicle interior 13, the peripheral portion 39 of the insertion hole 36 in the dash panel 32 is moved to the front side of the vehicle as compared with that before the frontal collision. Will be moved. That is, in the vehicle body front structure 30, it is possible to prevent the peripheral portion 39 of the insertion hole 36 from being deformed toward the vehicle interior 13 side at the time of a frontal collision. Then, by suppressing the peripheral portion 39 from being deformed toward the vehicle interior 13, it is possible to secure the foot space of the occupant P at the time of a frontal collision.

(Modification example)
The present invention is not limited to the above embodiment.

The vehicle body front structure 30 may be provided on a right-hand drive vehicle.

The method of joining the dash panel 32 and the cover member 34 is not limited to welding, and may be fastening using bolts and nuts or bonding using an adhesive.

The jointed portion 38 is not limited to having a curved surface shape that is entirely convex to the outside of the vehicle before the frontal collision, and may be partially convex to the vehicle interior 13 side. For example, if there is a portion (part) of the jointed portion 38 that is convex toward the vehicle interior 13 side before the frontal collision, this portion functions as a starting point of deformation in which the joined portion 38 warps. do.

Although the vehicle body front structure according to the embodiment and the modified example of the present invention has been described above, these embodiments and the modified example may be used in combination as appropriate, and various types may be used as long as the gist of the present invention is not deviated. Of course, it can be carried out in an embodiment.

10 Vehicle 13 Vehicle compartment 14 Engine compartment (an example of the front compartment)
18 Power unit (an example of front unit)
20 Steering device (an example of steering device)
30 Body front structure 32 Dash panel 34 Cover member 36 Insertion hole 38 Jointed part

Claims (1)

An insertion hole through which a part of the steering device is inserted and a jointed portion around the insertion hole are formed, and the vehicle interior and the front chamber arranged on the front side of the vehicle interior in the front-rear direction of the vehicle and having a front unit. With a dash panel that separates
A cover member that is arranged on the rear side of the front unit in the front-rear direction of the vehicle and is joined to the jointed portion from the front unit side to cover a part of the steering device.
Have,
The jointed portion has a curved surface shape in which at least a part thereof is convex toward the outside of the passenger compartment before the collision load is input, and when the collision load is input, the jointed portion is on the passenger compartment side. The front structure of the car body that deforms so that it becomes convex toward it.

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