JPH07205836A - Front part car body structure - Google Patents

Abstract

PURPOSE:To provide a structure of the front part car body which can obtain a reinforcement against a front side collision efficiently, while suppressing the increase of the cost and the weight. CONSTITUTION:To a front panel 8, a long size front guard bar 10 is extended in the car width direction by combining its both ends to front pillars 4, and the combining positions of both ends of the front guard bar 10 and the front pillars 4 are arranged at the height same as the front ends of door guard bars 2a provided at the inside of the doors 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front body structure of a structure generally called a cab-over type vehicle in which a drive source such as an engine is arranged below a front part of a passenger compartment, and more particularly to a front passenger compartment including a driver's seat. Reinforcement structure of the part.

[0002]

2. Description of the Related Art Conventionally, in a cab-over type vehicle having a structure in which an engine is arranged below a vehicle compartment such as a one-box car, the vehicle interior is formed almost up to the front end of the vehicle. Various measures have been adopted to ensure the safety of passengers at times.

As a countermeasure against these problems, for example, as is well known, a door guard bar is installed inside the door to prevent the door from being deformed toward the passenger compartment, or the steering column is moved backward due to the impact of a frontal collision of the vehicle. To prevent it from moving to the
(See Japanese Patent Publication) and the like are known.

[0004]

By the way, a cab-over type vehicle has a structure in which a front panel and a window glass are erected on the front part of the passenger compartment (for example, the actual opening 58). In order to secure a living space for an occupant in a vehicle frontal collision, it is necessary to improve the strength of the front panel. That is, in the case of a frontal collision, if the height of the collision partner is high, the front panel collides with the front bumper located below the front panel and the front panel is likely to be deformed rearward, or Also, when the height of the collision partner is lower than the height of the front panel, the front bumper collides and the movement of the lower structural part of the vehicle body stops, whereas the upper structural part moves forward due to inertial force. The front panel sometimes deformed forward in an attempt to continue. Such deformation of the front panel is particularly likely to occur when the door and the opening for the door are provided on the left and right of the driver's seat.

To improve the strength of the front panel as a countermeasure against this, it is well known that the plate thickness is increased or a channel-shaped reinforcing member is provided, but if these means are adopted, the vehicle body weight increases. .

The present invention has been made in view of these problems, and an object thereof is to provide a structure capable of efficiently providing reinforcement against a frontal collision while suppressing an increase in cost and weight.

[0007]

Therefore, in order to achieve such an object, the present invention effectively utilizes a strength member such as a front pillar, a center pillar, and a door guard bar provided in the front portion of the vehicle body to effectively use the front member. It was decided to reinforce the panel.

That is, in the front vehicle body structure of the present invention, the drive source is disposed below the front portion of the passenger compartment including the driver's seat, and the doors are provided on the left and right of the front portion of the passenger compartment. Inside the door, a door guard bar for reinforcement is provided over the entire length in the front-rear direction of the door, and a front pillar is erected on the front side of the door, while a center pillar is erected on the rear side of the door. On the front side of the front part of the vehicle compartment, a front panel that constitutes the front surface of the vehicle body is erected so that both ends in the vehicle width direction are connected to front pillars, and long reinforcing members are provided at both ends along the front panel. The structure is such that the reinforcing member is connected to the front pillar and extends in the vehicle width direction, and the connecting positions of both ends of the reinforcing member with the front pillar are arranged at substantially the same height as the front end of the door guard bar.

[0009]

[Operation] When the front panel collides due to a frontal collision, the backward collision load input to the front panel is
It is transmitted from the reinforcing member of the front panel to the left and right front pillars, and is further transmitted from the front pillar to the rear center pillar via the door guard bar. In this way, the collision load input to the front panel due to a frontal collision is once received by the frame structure including the reinforcing member, the front pillar, the door guard bar, and the center pillar,
Further, since the height of both ends of the reinforcing member and the front end of the door guard bar are provided at substantially the same height, shock transmission from the reinforcing member to the door guard bar is smoothly performed, and the front pillar on the way is difficult to bend. The rearward deformation of the front panel is suppressed.

Further, when only the lower structural portion of the vehicle body collides, the upper structural portion of the vehicle body tends to move forward due to inertial force. In the structure of the present invention, however, the above-mentioned reinforcing member, front pillar, door guard bar, center pillar and the like. The front panel is restrained from leaning forward by being stretched by the frame structure constituted by.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing a vehicle 1 to which a front vehicle body structure according to an embodiment of the present invention is applied.
It is a cab-over type in which an engine is provided below the vehicle interior R, a driver's seat is provided in the vehicle interior R, and front doors 2 are provided on the left and right of the vehicle interior R.

A front pillar 4 is erected on the front side of the front door 2, and a center pillar 5 is erected on the rear side of the front door 2. That is, the front pillar 4 constitutes the front edge of the opening opened and closed by the front door 2, and the lower end of the front pillar 4 extends forward and backward on the left and right of the vehicle body via an outrigger (not shown). On the other hand, the upper end is coupled to a roof rail (not shown) that reinforces the periphery of the roof 6, and the center pillar 5 also constitutes the rear edge of the opening portion. The lower end is connected to the side member 3 via an outrigger (not shown), while the upper end is connected to a roof rail (not shown). The front pillar 4 has a lower half that is erected substantially vertically upward and an upper half that extends obliquely toward the rear of the vehicle.

A door guard bar 2a for reinforcing the door 2 is provided inside the door 2 over the entire length in the front-rear direction. The door guard bar 2a is formed in a curved shape at an intermediate portion along the shape of the lower side of the window 2b of the door 2.

Incidentally, the door guard bar 2 described above
Each of the a, the side member 3, the front pillar 4, the center pillar 5, the outrigger, and the roof rail has a closed cross section, and is a strength member that forms the skeleton of the vehicle.

Between the left and right front pillars 4, a windshield 7 is provided on the upper side and a front panel 8 is provided on the lower side. A front bumper 9 is provided below the front panel 8 so as to project forward so as to protect the front portion of the vehicle 1 in the event of a frontal collision. The side member 3 extends into the front bumper 9 to support the front bumper 9 and ensure its strength.

As shown in FIG. 2, the front panel 8 is formed of a panel outer 8a and a panel inner 8b in a box cross section, and further, a flange is formed inside the front panel 8 so as to form a closed cross section with the panel inner 8b. 10a is joined to the panel inner 8b, and a channel-shaped front guard bar (reinforcing member) 10 whose end face on the vehicle front side is brought into contact with the panel outer 8a is provided. As shown in the perspective view of FIG. 3, the front guard bar 10 extends in the vehicle width direction below the windshield 7 so as to follow the shape of the front panel 8, and the left and right ends of the front guard bar 10 are connected to the front pillar 4. The front pillar 4 is connected to the door guard bar 2 and
It is arranged so as to be substantially the same height as the front end of a.

Next, the operation when the vehicle 1 of the present embodiment structure has a frontal collision will be described.

In the case of a frontal collision, first, the front bumper 9
And the front panel 8 immediately after that. Then, the input load to the front bumper 9 is transmitted to the side member 3, while the input to the front panel 8 is transmitted from the front guard bar 10 as a strength member to the left and right front pillars 4, and further to the door 2. It is received by the center pillar 5 via the door guard bar 2a inside.

That is, when the door 2 is closed, the door guard bar 2a is stretched in the front-rear direction between the pillars 4 and 5, and the door guard bar 2a is further extended.
Since the height of the front end of the front guard bar and the height of both ends of the front guard bar 10 are substantially the same, the input to the front guard bar 10 is transmitted to the center pillar 5 via the front pillar 4 and the door guard bar 2a. While being transmitted, the front pillar 4 is difficult to bend at this time. In this way, since the input load to the front panel 8 is received by the strength member that surrounds the front portion of the vehicle compartment R in a frame shape, the front panel 8 is less likely to be deformed rearward,
It is possible to secure a living space for passengers in the event of a frontal collision.

The front bumper 9 has a low height.
When only the vehicle collides, the upper structural portion of the vehicle 1 tries to move forward due to the inertial force. Even in such a case, in the structure of the present embodiment, the front guard bar 10,
The front pillar 8, the door guard bar 2a, and the center pillar 5 are stretched by a frame structure, so that the front panel 8 is prevented from falling forward.

As described above, in the structure of this embodiment,
In order to increase the strength of the front panel 8 by setting the front guard bar 10 inside the front panel 8,
Since the position at which both ends of the front guard bar 10 are connected to the front pillar 4 is arranged at substantially the same height as the front end of the door guard bar 2a, the front guard bar 10, the front pillar 4, and the front pillar 4, when the vehicle 1 is in frontal collision.
The frame structure of the strength member composed of the door guard bar 2a and the center pillar 5 can receive the input load and secure the living space for the occupant. By providing the front guard bar 10, the strength of the front panel 8 is simply increased. A stronger reinforcing effect can be obtained. Therefore, there is an effect that efficient reinforcement can be obtained while suppressing an increase in cost and weight.

The embodiment of the present invention has been described above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and even if there is a design change or the like without departing from the scope of the present invention. Included in the present invention.

For example, although the front panel is shown in the embodiment as being formed by the panel outer 8a and the panel inner 8b in a box sectional shape, only one of the panel outer 8a and the panel inner 8b forms the front surface of the vehicle compartment R. The front panel for covering may be configured and the other may be provided only on the peripheral edge thereof.

Further, the reinforcing member 1 provided on the front panel
0 is not limited to that shown in the embodiment as long as it is long in the vehicle width direction and has sufficient strength. For example, in the embodiment, the panel inner 8b forms a closed cross section. However, the reinforcing member may be used alone to form a closed cross section, or the shape is not limited to the shape shown in the embodiment such as a pipe, and a solid rod or the like may be used. You may use.

[0026]

As described above, according to the front vehicle body structure of the present invention, the positions of both ends of the reinforcing member provided in the vehicle width direction by connecting both ends to the front pillar along the front panel are Since the structure is arranged at approximately the same height as the front end position of the door guard bar, the load input to the front panel at the time of a frontal collision is determined by the strength member composed of the reinforcing member, the front pillar, the door guard bar, and the center pillar. It can be received by the frame structure, and the reinforcement effect beyond the strength increase of the front panel can be obtained by simply inserting the reinforcement member, and it is possible to achieve efficient reinforcement while suppressing cost and weight increase. can get.

[Brief description of drawings]

FIG. 1 is a side view showing a vehicle to which a front vehicle body structure according to an embodiment of the present invention is applied.

FIG. 2 is a cross-sectional explanatory view showing a main part of the embodiment structure.

FIG. 3 is a perspective view showing a front portion of a vehicle applied to a vehicle having an embodiment structure.

[Explanation of symbols]

 1 vehicle 2 door 2a door guard bar 4 front pillar 5 center pillar 8 front panel 10 front guard bar (reinforcing member)

Claims (1)

[Claims] 1. A drive source is disposed below a front portion of a passenger compartment including a driver's seat, and doors are provided on the left and right sides of the front portion of the passenger compartment. A door guard bar is provided over the entire length in the front-rear direction of the door, and a front pillar is erected on the front side of the door, while a center pillar is erected on the rear side of the door, and on the front side of the front part of the vehicle compartment. A front panel that constitutes the front surface of the vehicle body is erected so that both ends in the vehicle width direction are connected to the front pillars, and a long reinforcing member is connected to the front pillars at both ends in the vehicle width direction along the front panel. Extended to
In addition, the front vehicle body structure is characterized in that the connecting positions of the both ends of the reinforcing member with the front pillars are arranged at substantially the same height as the front end of the door guard bar.