JP3980703B2 - Auto body structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle body structure in an automobile, particularly to a structure around a lower portion of a dashboard.
[0002]
[Prior art]
As illustrated in FIG. 4, a vehicle body structure in which the rear end of a side frame extending in the front-rear direction of the vehicle body on the front side of the passenger compartment is coupled to the front surface of the dashboard is widely known (for example, published by Sankaidou) "See the Automotive Engineering Complete Book Vol. 13, Passenger Car Body, pages 20-23, etc.).
[0003]
[Problems to be solved by the invention]
In the above automobile, when a large collision load from the front is applied to the vehicle body due to a collision or the like, the feet corresponding to the lower part of the dashboard is deformed so that it protrudes backward due to deformation of the side frame or backward displacement. In this case, the occupant's ankle may be bent so that the angle θ (hereinafter simply referred to as the ankle angle) between the toe and the shin is reduced. Take the load.
[0004]
In order to suppress the decrease in the ankle angle, it is conceivable to provide a thick pad material at the lower part of the dashboard. In this case, however, the use of the thick pad material has a disadvantage that the foot space is narrowed accordingly. In order to suppress the decrease in the above-mentioned ankle angle, it is conceivable to increase the rigidity strength of the lower part of the dashboard and its periphery by using a reinforcing material. However, the use of such a reinforcing material greatly increases the weight and cost of the vehicle body. There are inconveniences such as an increase and a significant decrease in the current space.
[0005]
The present invention has been proposed in view of these circumstances, and even when the dashboard is deformed so that the portion of the dashboard that hits the toe portion protrudes backward, a thick pad material or reinforcing material is provided. An object of the present invention is to provide a vehicle body structure with a simple structure that can suppress a decrease in ankle angle of a front seat occupant without using it and can effectively reduce a bending force applied to the ankle. .
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is characterized in that a dashboard which forms a part of a vehicle body and constitutes a front end wall of a passenger compartment is connected to a substantially vertical vertical portion and a lower end of the vertical portion, and is rearwardly lowered. And a toe board part on which the front passenger's buttocks can be placed, and a lower end of the toe board part is coupled to a front end part of the floor panel . attached astride the vehicle body side frame rear ends in the vertical part and the toe board section, the middle portion of the side frame, the side frame in the vehicle body structure that combines sub-frame, when a collision of the vehicle to support the engine and transmitting a portion of the collision load acting from the front subframe heel corresponding portion of the toe board portion, the load transmission member for pushing the occupant of the heel portion to the rear is provided in the side frame The load transmitting member includes a bottom wall portion whose front half portion is formed substantially horizontally and whose rear half portion is inclined rearwardly downward, and left and right side wall portions which stand substantially vertically from left and right side edges of the bottom wall portion. And a substantially horizontal front half portion of the bottom wall portion thereof is coupled to or near the coupling portion between the rear edge of the subframe and the side frame. In addition, the rear end portion of the bottom wall portion is overlapped and welded to the front end portion of the floor panel of the vehicle body, and the rear end edges of the left and right side wall portions are inclined rearwardly downward along the toe board portion, and on both the left and right outer sides. A pair of right and left connection flanges facing each other is integrally formed, and each connection flange is superposed and welded to the back surface of the toe board portion . According to this feature, even if the abutting portion between the dashboard of the side frame with the collision of the automobile, that is, the portion corresponding to the toe portion of the front seat passenger is deformed as pushed out to the rear, when the collision The rearward displacement (that is, the backward load) of the side frame and the subframe is reliably transmitted to the toeboard portion of the dashboard via the load transmitting member, and the toeboard portion , and further , the occupant's buttocks portion is pushed backward. It is possible to suppress a decrease in the occupant's ankle angle due to the above deformation of the dashboard and effectively reduce the bending load applied to the ankle without specially using a thick pad material or a reinforcing material. .
[0007]
In addition, the rear end of the bottom wall of the load transmission member is overlapped and welded to the front end of the floor panel of the vehicle body, so that the load transmission of the load transmission member in the event of a vehicle collision is not only the toe board portion of the dashboard. The front end portion is also made surely, and the occupant's buttocks located at the front end portion of the panel can be pushed more reliably rearward.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.
[0009]
In the accompanying drawings, FIG. 1 is a longitudinal sectional view of a dashboard and its surroundings showing an embodiment of the present invention, FIG. 2 is a perspective view of a single load transmission member, and FIG. 1 is a cross-sectional view similar to FIG.
[0010]
1 and 2, the vehicle body F of the automobile V has a monocoque structure by welding and assembling steel plate panels, and the vehicle body F on the front side of the passenger compartment C has a pair of left and right sides that extend in the front-rear direction on the left and right sides. The frame S is integrally formed. Each of the left and right side frames S is formed in a closed cross-sectional structure to form a skeleton of the front vehicle body, and at least front and rear of a rectangular subframe Su that supports the engine E between the side frames S. The left and right corners are coupled and supported at a plurality of locations. In particular, the lower wall near the rear end of the side frame S is integrally formed with a massive portion 1 that swells downward, and the bottom surface of the massive portion 1 has an upper surface of the rear end edge portion (that is, the rear beam Sur) of the subframe Su. They are in contact with each other and are connected by appropriate fixing means (bolt B and nut N in the illustrated example).
[0011]
A dashboard D that forms a part of the vehicle body F and forms the front end wall of the passenger compartment C is disposed substantially vertically so as to partition the passenger compartment C and the engine compartment. The lower end portion of the dashboard D is inclined downward and constitutes a toe board portion Dt corresponding to the feet of the front seat occupant, and the lower end edge thereof is welded to the front end portion of the floor panel Fp of the vehicle body F, etc. Are integrally connected by the fixing means. On the front surface near the lower end of the dashboard D, the rear end portions of the left and right side frames S straddle the substantially vertical vertical portion Dv and the inclined lower end portion Dt of the board D, and are spaced from each other. Are connected together. The above is the conventional ordinary vehicle body structure.
[0012]
In the side frame S corresponding to the passenger seat side, a load transmission extending in the front-rear direction so as to transmit a part of the collision load acting on the side frame S and the subframe Su from the front to the lower end of the dashboard D in the event of a vehicle collision. A member T is provided, and the rear end portion of the member T extends substantially linearly to the back side of the lower end portion of the dashboard D through the rear end opening portion 2 of the side frame S. The load transmitting member T is basically composed of a strong channel material having a U-shaped cross section, and the bottom wall portion 3 is formed so that the front half portion in contact with the rear beam Sur is substantially horizontal and the latter half portion is the rear portion. It is inclined downward, and its rear end partly overlaps with the front end of the floor panel Fp and is joined by welding or the like. Further, the front end portion of the bottom wall portion 3 is connected to a connecting portion between the rear end edge portion of the sub-frame Su (that is, the rear beam Sur) and the side frame S with an appropriate connecting means (in the illustrated example, between the rear beam Sur and the side frame S). It is connected with a connecting bolt B and nut N).
[0013]
From the left and right side edges of the bottom wall part 3, left and right side wall parts 5 stand substantially vertically, and the upper edge of each side wall part 5 extends horizontally. And the rear end edge of each side wall part 5 has a pair of left and right connecting flanges 5f that are inclined downward and downward along the toe board part Dt of the dashboard D, and that faces both the left and right outer sides. Each of the connection flanges 5f is superposed on the back surface of the toe board portion Dt and is integrally coupled by welding or the like.
[0014]
A pair of left and right side sills Si extending in the front-rear direction and forming a part of the vehicle body F are integrally coupled to the left and right side edge portions of the floor panel Fp. A rear end portion of the frame S is connected via a reinforcing material 10.
[0015]
Next, the operation of each embodiment will be described. In a normal use state of the automobile V, the load transmission member T is located on the back side of the inclined lower end portion (that is, the toe board portion Dt) of the dashboard D, and is not protruded at all to the passenger compartment C side. The foot space of the front seat occupant is not reduced by the load transmission member T.
[0016]
Further, due to a frontal collision of the automobile V, the abutting portion with the side frame S at the rear end of the dashboard D, that is, the portion corresponding to the toe portion of the front seat occupant is deformed so as to protrude backward as shown in FIG. In such a case, the engine E that has received the collision load (and therefore the subframe Su that supports the engine E) also tends to move backward. The load transmission member T, whose front end is coupled to the rear end edge (rear beam Sur) of the subframe Su, is used to detect the backward displacement (and hence the reverse load) of the side frame S and the subframe Su at the time of collision. Directly transmitting to the lower end of D, the lower end of the board, and thus the occupant's buttocks 6 can be pushed backward. Thereby, the decrease in the ankle angle θ of the occupant accompanying the deformation of the dashboard D is suppressed as much as possible, the bending load applied to the ankle can be effectively reduced, and the decrease in the ankle angle θ is suppressed. There is no need for special use of thick padding or reinforcement.
[0017]
Further, since the rear beam Sur is located near the dashboard D, the load transmission member T responsible for transmitting the load between the two can be formed as short as possible in the front-rear direction, and the weight and size thereof can be reduced.
[0018]
As mentioned above, although the Example of this invention was described, this invention is not limited to the Example, A various Example is possible within the scope of the present invention. For example, in the above-described embodiment, the front end portion of the load transmitting member T is connected to the joint portion between the rear end edge portion (that is, the rear beam Sur) and the side frame S of the subframe Su with a bolt B in order to simplify the coupling structure. Although what was combined collectively was shown, it replaces with such a structure and replaces the front-end part of the load transmission member T with the side frame S or the sub-frame Su in the vicinity of the said connection part (for example, exclusive use). The bolts may be coupled with each other.
[0019]
Further, in the above embodiment, the load transmission member T is provided on the passenger seat side, but the load transmission member T may be provided on the driver seat side.
[0020]
【The invention's effect】
As described above, according to the present invention, when the vehicle collides with the side frame of the dashboard, that is, the portion corresponding to the front of the front seat occupant is deformed so as to protrude backward, The backward displacement of the side frame and sub-frame (and hence the backward load) at the time of the collision is reliably transmitted to the toe board part of the dashboard through the load transmitting member, and the toe board part and, consequently , the occupant's buttocks part are moved backward. Since it can be pushed, a decrease in the ankle angle of the occupant accompanying the above deformation of the dashboard can be suppressed, and the bending load applied to the ankle can be effectively reduced. Moreover, since it is not necessary to use a thick pad material or reinforcing material to suppress the decrease in the ankle angle, the weight and cost of the vehicle body can be reduced accordingly, and a sufficient foot space can be secured .
[0021]
The rear end portion of the bottom wall of the load transmission member, polymerized floor panel front portion of the vehicle body, since it is welded, the toe board portion only or the floor panels of the load transfer of the load transmission member is a dashboard in the vehicle collision The front end portion is also made surely, and the occupant's buttocks located at the front end portion of the panel can be pushed more reliably rearward.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a dashboard and its surroundings showing an embodiment of the present invention. FIG. 2 is a perspective view of a load transmission member. FIG. 3 is a view similar to FIG. Cross-sectional view [Fig. 4] Dashboard showing the conventional example and the surrounding vertical cross-sectional view [Explanation of symbols]
D ... Dashboard
Dt ... Toe board
Dv ... vertical part E ... engine F ... vehicle body Fp ... floor panel S ... side frame Su ... subframe Sur ... rear beam T as subframe rear edge .... Load transmission members

Claims (1)

A dashboard (D) which forms a part of the vehicle body (F) and forms the front end wall of the passenger compartment (C) is connected to the substantially vertical vertical portion (Dv) and the lower end of the vertical portion (Dv) and descends rearwardly. And a toe board part (Dt) on which the front seat occupant's buttocks (6) can be placed, and the lower end of the toe board part (Dt) is coupled to the front end part of the floor panel (Fp), The rear end of the side frame (S) of the vehicle body (F) on the front side of the passenger compartment (C) is connected to the front surface of the dashboard (D) across the vertical part (Dv) and the toe board part (Dt). In the vehicle body structure in which the subframe (Su) supporting the engine (E) is coupled to the middle portion of the side frame (S),
A part of the collision load acting on the side frame (S) and the subframe (Su) from the front in the event of a car collision is transmitted to the corresponding part of the toe board part (Dt), and the occupant's heel part (6) is moved backward. A load transmitting member (T) for pushing to the side frame (S) ,
The load transmission member (T) has a bottom wall (3) whose front half is formed substantially horizontally and whose rear half is inclined downwardly, and substantially vertical from both left and right edges of the bottom wall (3). Left and right side wall portions (5, 5) and a channel material having a U-shaped cross section,
A substantially horizontal front half portion of the bottom wall portion (3) is coupled to or near the coupling portion between the rear end edge (Sur) of the subframe (Su) and the side frame (S). The rear end of the part (3) is superposed and welded to the front end of the floor panel (Fp) of the vehicle body (F),
The rear end edges of the left and right side wall portions (5, 5) are inclined downward and rearward along the toe board portion (Dt), and a pair of left and right connecting flanges (5f, 5f) facing both the left and right sides are integrated. An automobile body structure characterized in that each of the connecting flanges (5f, 5f) is superposed and welded to the back surface of the toe board portion (Dt) .

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