JP2020100172A - Vehicle structure - Google Patents

Abstract

To provide a vehicle structure capable of inhibiting a displacement of a cross member toward the upper side of a vehicle in the case of frontal collision, though it has a simple constitution.SOLUTION: A vehicle structure 1 includes a pedal bracket 2, a guide bracket 3, and a cross member 4. The pedal bracket 2 is fixed to a dash panel 10 of a vehicle, and suspends a brake pedal 12 so that the brake pedal can freely swing. The guide bracket 3 has a guide surface 31 that guides, in the case of frontal collision of the vehicle, the pedal bracket 2 being displaced toward the backward of the vehicle, toward the lower side of the vehicle. The cross member 4 extends in a vehicle width direction, and the guide bracket 3 is coupled to the cross member. The guide bracket 3 is located behind the guide surface 31, and has a stopper part 33 that abuts against and stops the pedal bracket 2 guided by the guide surface 31 in the case of frontal collision.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle structure.

As a vehicle structure, a brake pedal mounting structure of Patent Document 1 is known. The brake pedal mounting structure of Patent Document 1 includes a pedal bracket, a guide bracket, and a pillar-to-pillar member (cross member). The pedal bracket swingably supports the brake pedal. The pedal bracket is attached to the dash panel. The guide bracket has a guide surface that guides a rear end portion of the pedal bracket, which is displaced rearward of the vehicle due to a frontal collision of the vehicle, toward a lower side of the vehicle. The guide bracket is fixed to the pillar-to-pillar member. The pillar-to-pillar member connects the pair of left and right front pillars.

JP, 2003-112614, A

At the time of a frontal collision of the vehicle, the pedal bracket is guided to the lower side of the vehicle by the guide surface, so that the load on the upper side of the vehicle acts on the cross member. The load on the upper side may displace the cross member to the upper side. Generally, a steering wheel is supported by a cross member via a steering shaft. If the cross member is displaced, the deployment position of the airbag inside the steering wheel is displaced.

One of the objects of the present invention is to provide a vehicle structure capable of suppressing the displacement of the cross member to the upper side of the vehicle at the time of a frontal collision of the vehicle with a simple structure.

A vehicle structure according to an aspect of the present invention is
A pedal bracket that is fixed to the dash panel of the vehicle and suspends the brake pedal swingably,
A guide bracket having a guide surface for guiding the pedal bracket, which is displaced to the rear side of the vehicle, to the lower side of the vehicle at the time of a frontal collision of the vehicle,
A cross member extending in the vehicle width direction, to which the guide bracket is connected,
The guide bracket includes a stop portion provided on the rear side of the guide surface and configured to stop the pedal bracket guided by the guide surface against a front collision.

The vehicle structure described above has a simple structure in which the guide bracket includes the stopper, and can suppress the displacement of the cross member to the upper side of the vehicle at the time of a frontal collision of the vehicle. At the time of a frontal collision, when the pedal bracket is guided downward by the guide surface, an upward load acts on the cross member via the guide bracket. On the other hand, when the pedal bracket guided by the guide surface is abutted against the stopper portion of the guide surface, the load on the lower side of the vehicle can be applied to the cross member via the guide bracket. Therefore, even if the cross member is once displaced upward due to the upward load at the time of a frontal collision, the cross member can be displaced downward due to the downward load. Specifically, the cross member can be returned to the position before the frontal collision. Therefore, it is possible to suppress the deviation of the deployment position of the airbag on the steering wheel. As described above, since the displacement of the cross member to the upper side of the vehicle at the time of a frontal collision can be suppressed with a simple structure, it is not necessary to increase the rigidity of the cross member itself or the mounting rigidity of the cross member. .. Therefore, increase in weight, increase in cost, and decrease in productivity are unlikely to occur.

1 is a side view showing an outline of a vehicle structure according to a first embodiment. 3 is a side view schematically showing a state at the time of a frontal collision in the vehicle structure according to the first embodiment. FIG.

A first embodiment of a vehicle structure of the present invention will be described below with reference to FIGS. 1 and 2. The same reference numerals in the drawings indicate the same names. In the figure, “FR” indicates the front of the vehicle, “RR” indicates the rear, “UP” indicates the upper side, and “LWR” indicates the lower side.

<<Embodiment 1>>
[Vehicle structure]
The vehicle structure 1 according to the first embodiment includes the pedal bracket 2 fixed to the dash panel 10 and the guide surface 31 that guides the pedal bracket 2 that is displaced rearward of the vehicle to the lower side of the vehicle during a frontal collision of the vehicle. The guide bracket 3 is provided, and the cross member 4 extending in the vehicle width direction and connected to the guide bracket 3 is provided. One of the features of this example is that the guide bracket 3 has a stop portion 33 which is provided at a predetermined position of the guide surface 31 and which stops the pedal bracket 2 guided by the guide surface 31 in the event of a frontal collision. is there. The details will be described below.

[Dash panel]
The dash panel 10 is a plate-shaped member provided at the front end of the vehicle compartment. The lower end of the dash panel 10 is connected to the floor panel, and the upper end of the dash panel 10 is connected to the cowl top (both not shown). A booster including a brake booster as a main part is attached to a front surface of the dash panel 10 (all are not shown). The brake booster includes an operation rod (not shown) that penetrates the dash panel 10 and is connected to the middle of the pedal arm 121 of the brake pedal 12. Below the dash panel 10, a pedal bracket 2 is attached to the surface on the vehicle compartment side.

[Pedal bracket]
The pedal bracket 2 suspends the brake pedal 12 swingably. The pedal bracket 2 is cantilevered by the dash panel 10 in this example, and protrudes rearward of the vehicle from the surface of the dash panel 10 on the vehicle interior side. The rear end side of the pedal bracket 2 is located on the lower front side with respect to the cross member 4, and in this example, is in contact with the front end side of the guide surface 31 of the guide bracket 3.

The rear end side of the pedal bracket 2 may be connected to the guide bracket 3. The connection structure between the pedal bracket 2 and the guide bracket 3 is not particularly limited as long as the connection between the pedal bracket 2 and the guide bracket 3 is not released during normal times when the vehicle does not receive an external force from the front, and the connection is released during a frontal collision. Instead, a known technique can be adopted. For example, this connection structure can be configured by forming through holes that communicate with each other at a position where the pedal bracket 2 and the guide bracket 3 are in contact with each other, and inserting one bolt into both of the through holes. (Not shown). The bolt may be configured to be broken by the impact at the time of frontal collision.

The shape of the pedal bracket 2 is not particularly limited as long as it can support the brake pedal 12. The pedal bracket 2 of this example is configured by a member having a cross section in a cross section along the direction perpendicular to the paper surface of FIG. And a side piece 22 of. The upper ends of the pedal arms 121 of the brake pedal 12 are bridged over the left and right side pieces 22. The rear end portion 23 of the upper piece 21 is formed in the shape of a protruding piece that projects rearward from the side piece 22. The shape of the rear end portion 23 is a bent shape that bends downward and rearward in this example. The shape of the rear end portion 23 may be a linear shape that projects linearly rearward, or a curved shape that curves downward and rearward. The rear end portion 23 of the upper piece 21 is guided when the pedal bracket 2 is guided to the lower side of the vehicle by the guide surface 31 of the guide bracket 3 as the dash panel 10 intrudes rearward at the time of a frontal collision of the vehicle. It is stopped by the stopper 33 of the bracket 3.

[Guide bracket]
The guide bracket 3 has a guide surface 31 that guides the pedal bracket 2 that is displaced toward the rear side of the vehicle toward the lower side of the vehicle during a frontal collision. The guide bracket 3 is connected to the cross member 4. The guide bracket 3 of this example is directly fixed to the cross member 4 by welding or the like. The guide bracket 3 projects from the cross member 4 toward the pedal bracket 2 side (downward in the front direction). The guide surface 31 is formed at the front end of the guide bracket 3. The guide surface 31 is a curved surface that curves downward from the front side toward the rear side. The front end side of the guide surface 31 is connected to the rear end side of the upper piece 21 of the pedal bracket 2 as described above. A stopper 33, which will be described later, is provided at a predetermined location on the guide surface 31.

(Stop part)
The stopper 33 stops the rear end portion 23 of the pedal bracket 2 guided by the guide surface 31 at the time of a frontal collision. The stop 33 is formed on the rear side of the guide surface 31. The rear side refers to a region behind a position where the pedal bracket 2 guided by the guide surface 31 starts to be displaced downward. That is, it refers to a region where a downward load is applied to the cross member 4 via the guide bracket 3 by contact with the rear end portion 23 of the pedal bracket 2. In this example, the stop portion 33 is formed at the rear end of the guide surface 31. The shape of the stop portion 33 is not particularly limited as long as the rear end portion 23 of the pedal bracket 2 can be hit and stopped. The stopper 33 of this example is formed of an L-shaped piece, and is integrally formed with the guide surface 31 so that the front upper side is open. The stopper 33 engages with the rear end 23 of the pedal bracket 2. The stopper 33 may be a straight piece that linearly projects from the guide surface 31 toward the front lower side or the front side.

[Cross member]
The cross member 4 ensures the torsional rigidity of the vehicle body. A steering shaft and the like are supported by the cross member 4 via a steering column (all are not shown). A steering wheel is provided on the upper end side of the steering shaft. The cross member 4 is a structural member that connects the lower ends of the left and right front pillars (A pillars) so as to extend in the vehicle width direction, and is also called a pillar-to-pillar member. The cross member 4 is usually made of a metal pipe. In this example, the guide bracket 3 is directly fixed to the lower front of the cross member 4.

[Behavior during frontal collision]
The behavior at the time of a frontal collision in the vehicle structure 1 of this example will be described mainly with reference to FIG. FIG. 2 schematically shows the vehicle structure 1 at the time of a frontal collision.

During a frontal collision, the load that acts on the vehicle from the front to the rear of the vehicle causes the dash panel 10 to enter the rear of the vehicle. When the pedal bracket 2 and the guide bracket 3 are connected to each other, the dash panel 10 enters the rear of the vehicle after the connection is released. As the dash panel 10 enters the rear of the vehicle, the pedal bracket 2 is displaced rearward, and the rear end portion 23 of the pedal bracket 2 slides on the guide surface 31 of the guide bracket 3. By this sliding, the rear end portion 23 of the pedal bracket 2 is guided downward and tilted downward. When the rear end portion 23 of the pedal bracket 2 slides to the rear end of the guide surface 31, the rear end portion 23 of the pedal bracket 2 is abutted against the stopper portion 33 of the guide surface 31 of the guide bracket 3.

[Use]
The vehicle structure 1 can be suitably used for a vehicle structure of a full-cabover type vehicle or a semi-cabover type vehicle. An engine room is not provided in front of the dash panel 10 in the full cab-over type vehicle and the semi-cab-over type vehicle. Therefore, the time lag between the frontal collision and the rearward displacement of the pedal bracket 2 is much smaller than that of a vehicle (bonnet type vehicle) having an engine room in front of the dash panel 10.

[Action effect]
The vehicle structure 1 according to the embodiment can achieve the following effects.

(1) With a simple configuration in which the guide bracket 3 includes the stopper 33, the displacement of the cross member 4 to the upper side at the time of a frontal collision can be suppressed. When the rear end portion 23 of the pedal bracket 2 is guided downward by the guide surface 31, an upward load acts on the cross member 4 via the guide bracket 3 due to a reaction. Thereafter, when the rear end portion 23 of the pedal bracket 2 is abutted against the stopper portion 33 of the guide bracket 3, the cross member 4 is moved downward through the guide bracket 3 as shown by a black arrow in FIG. The load of can be applied. Therefore, the cross member 4 is displaced upward by the upward load, and then the cross member 4 can be displaced downward by the downward load. Therefore, the cross member 4 can be returned to the original position before the frontal collision. Since the cross member 4 can be returned to the original position, the displacement of the steering shaft supported by the cross member 4 can be suppressed, and the displacement of the deployment position of the airbag in the steering wheel can be suppressed.

(2) An increase in weight, an increase in cost, and a decrease in productivity hardly occur. Since the displacement of the cross member 4 to the upper side of the vehicle at the time of a frontal collision can be suppressed with a simple structure of providing the stopper 33, the rigidity of the cross member 4 itself or the building rigidity of the cross member 4 can be increased. This is because it does not have to be.

(3) When a frontal collision occurs, the brake pedal 12 can be prevented from interfering with the occupant's legs. As shown by the white arrow in FIG. 2, since the rear end portion 23 of the pedal bracket 2 can be guided downward by the guide surface 31 of the guide bracket 3 and the rear end portion 23 of the pedal bracket 2 can be tilted downward, This is because the step portion 122 at the lower end of the pedal arm 121 of the brake pedal 12 can be rotated forward.

The present invention is not limited to these examples, but is defined by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

1 Vehicle Structure 2 Pedal Bracket 21 Upper Piece 22 Side Piece 23 Rear End 3 Guide Bracket 31 Guide Surface 33 Stopper 4 Cross Member 10 Dash Panel 12 Brake Pedal 121 Pedal Arm 122 Tread

Claims (1)

A pedal bracket that is fixed to the dash panel of the vehicle and suspends the brake pedal swingably,
A guide bracket having a guide surface for guiding the pedal bracket, which is displaced toward the rear side of the vehicle, toward the lower side of the vehicle at the time of a frontal collision of the vehicle,
A cross member extending in the vehicle width direction, to which the guide bracket is connected,
The vehicle structure having the guide bracket, which is provided on the rear side of the guide surface and has an abutment portion for abutting and stopping the pedal bracket guided by the guide surface in the case of a frontal collision.

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