JPH092335A - First cross-member structure for vehicle - Google Patents

Abstract

PURPOSE: To provide a first cross-member which can enhance the ventilating ability of an engine compartment and which can reduce a load exerted to a position where the first cross-member and the center member are attached. CONSTITUTION: In a vehicle cross-member structure in which a center member 104 for supporting an engine is attached at its front end no the lower part of the cross-member provided in the front end part of an engine compartment, and extending widthwise of a vehicle so as to connect left and right side members together, the front part of the first cross-member 101. is extended forward, and an protrusion 101c which is projected, at least in its extending part, downward from the front end part of the center member 10 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a first cross member structure for a vehicle, and more particularly to a first cross member structure for a vehicle in which the first cross member has an air dam effect and a road surface interference detection function.

[0002]

2. Description of the Related Art As a conventional automobile, an engine room is provided at the front of the vehicle body, and a first cross member extending in the vehicle width direction provided at the front end of the engine room has a center member mounted with an engine. There is a structure with one end attached.

FIG. 5 shows an example of the structure of such a conventional automobile (see Japanese Utility Model Laid-Open No. 3-88922), in which one end of a center member 503 on which an engine 502 is mounted is attached to a lower portion of a first cross member 501. ing. In addition, at the top of the first cross member 501,
A radiator 504 and a condenser 505 are arranged.

On the other hand, when the vehicle is running, the pressure distribution on the vehicle surface is such that the front vertical surface of the vehicle becomes a positive pressure portion and the lower portion of the engine room becomes a negative pressure portion due to the traveling wind pressure. Due to this pressure distribution, the air introduced from the front opening of the vehicle passes through the radiator 504 and the condenser 505 and is then exhausted to the lower part of the engine room. In other words, the larger the pressure difference between the positive pressure part and the negative pressure part,
Ventilation of the engine room will be performed quickly, and the ventilation performance will be improved.

[0005]

However, in the above-described conventional first cross member structure for a vehicle, although it is used for attaching a center member or a radiator, no consideration is given to the improvement of ventilation performance. There wasn't.

Further, in the conventional vehicle first cross member structure, the center member is mounted so as to be positioned below the first cross member, and road surface interference detection is performed at the mounting position of the first cross member and the center member. Since this is done, there is a problem that the load on the mounting position is large.

The present invention has been made in view of the above, and an object thereof is to provide a first cross member structure which improves the ventilation performance of an engine room.

Another object of the present invention is to provide a first cross member structure which reduces the load applied to the mounting positions of the first cross member and the center member.

[0009]

In order to achieve the above object, a first cross member structure for a vehicle according to claim 1 is provided at a front end portion of an engine room and extends in the vehicle width direction so as to extend to the left and right. In a vehicle first cross member structure in which a tip of a center member that supports an engine is attached to a lower portion of a first cross member that connects a front side member, a front portion of the first cross member extends forward and at least this extension. A protrusion is provided by projecting the existing portion downward from the tip of the center member.

In the first cross member structure for a vehicle according to a second aspect of the present invention, a lower panel that opens the first cross member upward, an upper panel that closes the open side of the lower panel to form a closed cross section, and an inner side of the lower panel. And a reinforcing panel provided on the lower panel, and a closed cross section is formed between the protrusion provided on the lower panel and the reinforcing panel.

Further, in the first cross member structure for a vehicle according to a third aspect of the present invention, the first cross member extends upward over the entire surface of the lower panel in the vehicle width direction, and the upper surface of the upper panel behind the extending portion. The engine room harness and the radiator are arranged in parallel in the vehicle width direction.

[0012]

According to the first cross member structure for a vehicle of the present invention (claim 1), the front portion of the first cross member extends forward, and at least this extending portion projects downward from the tip end portion of the center member. Form a protrusion.
Therefore, the protrusion acts as an air dam, blocks the air flow (wind) flowing below the vehicle body, and increases the negative pressure in the lower part of the engine room. Also, when there is road surface interference, the first cross member contacts the road surface before the center member.

Further, the first cross member structure for a vehicle according to the present invention (claim 2) is provided inside the lower panel, an upper panel having a closed cross section by closing the open side of the lower panel. A first cross member is configured with the reinforcing panel, and a closed cross section is formed between the protrusion provided on the lower panel and the reinforcing panel. Therefore, it is possible to reinforce the center member, especially the portion (projection) that interferes with the road surface. In addition, it becomes easy to secure the auxiliary equipment mounting part by flattening the upper surface of the first cross member.

Further, according to the first cross member structure for a vehicle of the present invention (claim 3), the entire lower panel of the first cross member extends upward in the vehicle width direction, and the upper panel on the back of this extending portion is provided. The engine room harness is protected by arranging the engine room harness and the radiator in parallel in the vehicle width direction of the upper surface.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the vehicle first cross member structure of the present invention will be described in detail below with reference to the drawings.

1 and 2 show an embodiment of the present invention. In the figure, reference numeral 101 denotes a first cross member provided in the front end portion of the vehicle body and extending in the vehicle width direction. The engine 102 and the transaxle 10 are provided at the lower end of the first cross member 101 at the center portion in the vehicle width direction.
The center member 104 on which 3 is mounted is fixed by bolts.

A radiator 105 is provided above the first cross member 101 and a condenser 10 is provided in front of the radiator 105.
6 is arranged. Further, a hood lock stay 107 is arranged above the center portion of the first cross member 101 in the vehicle width direction.
The lower end of the first cross member 101 by the bolt
It is fixed to.

Both ends of the first cross member 101 are respectively provided on the left and right side members 110, 1 of the vehicle.
It is fixed to 11 by bolts and joined to the left and right radiator core side panels (not shown).

On the other hand, the engine 102 and the transaxle 103 are supported in the vehicle front-rear direction by engine mounts 108 and 109 provided on the center member 104, and engine mounts provided on the left and right side members 110 and 111 of the vehicle. 112 and 113 are supported from the left and right direction of the vehicle.

The center member 104 has its front end supported by the first cross member 101, and its rear end fixed to the subframe 116 supported by the left and right dash lower panels 114, 115 and the side members 110, 111 with bolts. Has been done. In the figure, 117 is an engine room harness and 118 is a front bumper. The upper part of the engine room is covered with a hood 119.

Next, the structure of the first cross member 101 of this embodiment will be described with reference to FIGS. 3 and 4A and 4B. FIG. 3 is an enlarged side view of an essential part of a portion of the first cross member 101 in FIG. 1, which corresponds to a cross-sectional view of the first cross member 101 taken along the line AA in FIG. In addition, FIG.
2 is a cross-sectional view of the first cross member 101 along the line BB, and FIG. 4B corresponds to a cross-sectional view of the first cross member 101 along the line C-C in FIG.

The first cross member 101 is formed of an upper panel 101a and a lower panel 101b in a closed cross-section structure, and a front end portion of the lower panel 101b projects downward from the vehicle to project a protrusion 101c for increasing a negative pressure in a lower portion of the engine room. Is formed. This projection 10
The 1c can block the air flow (wind) flowing into the lower part of the vehicle body and increase the negative pressure in the lower part of the engine room.

As shown in the figure, the projection 101c is provided at the mounting position of the center member 104.
It projects downward from the lowermost end of the vehicle. With this configuration, when there is road surface interference, the center member 1
The first cross member 101 comes into contact with the road surface before 04, and functions to detect road surface interference.

Further, the first cross member 1 shown in FIG.
As shown in the cross section of the vehicle No. 01 at the center in the vehicle width direction (AA cross section in FIG. 2), the center member 104 is fixed to the lower end of this position by the bolt 302, so that the reinforcement panel as a reinforcement of the vehicle body strength is provided. 301 is attached. In this embodiment, the first cross member 101 has a closed cross-sectional structure in which the upper panel 101a and the lower panel 101b are aligned in the vertical direction of the vehicle. Can be attached, and workability can be improved.

Further, as shown in the drawing, the entire lower panel 101b of the first cross member 101 extends upward in the vehicle width direction, and the upper panel 101a behind the extending portion 304 has an upper surface in the vehicle width direction of the engine room harness. 11
Since 7 and the radiator 105 are arranged in parallel, the engine room harness can be protected.

Further, as shown in FIG. 4 (a) (section BB in FIG. 2), a reinforcement 301 is also provided at a position where the hood lock stay 107 is attached, and a lower end portion of the hood lock stay 107 is provided. Are fastened together with the first cross member 101 and the reinforcement 301 by bolts 303.

Further, as shown in FIG. 4B (section CC in FIG. 2), the first cross member 101 is fixed to the portion to which the center member 104 is attached and the left and right side members 110 and 111 with bolts. Except for both ends, the cross-sectional shape in the vehicle width direction is rectangular. However, it goes without saying that the rectangular cross-sectional shape also has the protrusion 101c. Alternatively, the cross-sectional shape in the vehicle width direction may be substantially the same as that in FIG.

Further, the position of the reinforcement 301 in the first cross member 101 is not particularly limited and may be properly attached at a required position and a required position.

As described above, in this embodiment, by providing the projecting portion 101c in which the front end portion or the lower portion of the first cross member 101 is projected to the lower side of the vehicle, the effect as an air dam can be obtained, and the lower portion of the vehicle body can be achieved. The air flow (wind) flowing in is blocked, and the negative pressure in the lower part of the engine room increases. In other words, the ventilation performance of the engine room, especially the ventilation performance of the radiator, is improved.

Further, the shape of the projection 101c makes it possible to have a function of detecting road surface interference. By thus performing the road surface interference detection by the first cross member 101, the center member 104 can be abolished by, for example, reviewing the structure of the engine mount.

[0031]

As described above, according to the first cross member structure for a vehicle of the present invention (claim 1), the front portion of the first cross member extends forward and at least this extension portion of the center member. Since the protrusion is formed by projecting downward from the tip, the protrusion acts as an air dam, and the air flow (wind) flowing into the lower part of the vehicle body is blocked, increasing the negative pressure in the lower part of the engine room,
The ventilation performance of the engine room can be improved.
Further, when there is road surface interference, the first cross member comes into contact with the road surface before the center member, so that the load applied to the mounting positions of the first cross member and the center member can be reduced.

The first cross member structure for a vehicle according to the present invention (claim 2) is provided inside the lower panel, the upper panel which is opened upward, the upper panel whose closed side is closed by closing the open side of the lower panel. Since the first cross member is constituted by the reinforcing panel and a closed cross section is formed between the protrusion provided on the lower panel and the reinforcing panel, the center member, particularly the portion (projection) that interferes with the road surface can be reinforced. . Further, the flattening of the upper surface of the first cross member makes it possible to easily secure an accessory mounting portion.

Further, according to the first cross member structure for a vehicle of the present invention (claim 3), the entire lower panel of the first cross member extends upward in the vehicle width direction, and the upper panel on the back of this extending portion is provided. Since the engine room harness and the radiator are arranged in parallel in the vehicle width direction of the upper surface, the engine room harness can be protected.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a front portion of a vehicle body showing a first cross member structure of a vehicle according to an embodiment.

FIG. 2 is a sectional view taken along line XX in FIG.

FIG. 3 is an explanatory diagram showing a first cross member structure of the present embodiment.

FIG. 4 is an explanatory diagram showing a first cross member structure of the present embodiment.

FIG. 5 is an explanatory view showing a structural example of a conventional automobile.

[Explanation of symbols]

101 First Cross Member 101a Upper Panel 101b Lower Panel 101c Projection 102 Engine 103 Transaxle 104 Center Member 105 Radiator 106 Condenser 107 Hood Lock Stay 117 Engine Room Harness 304 Extension

Claims (3)

[Claims] 1. A vehicle in which a front end of a center member supporting an engine is attached to a lower portion of a first cross member which is provided at a front end portion of an engine room and extends in the vehicle width direction to connect left and right front side members. In the first cross member structure described above, the front portion of the first cross member is extended forward, and at least the extended portion is projected downward from the tip end portion of the center member to provide a protrusion portion. First cross member structure. 2. The first cross member includes a lower panel that opens upward, an upper panel that closes the open side of the lower panel to form a closed cross section, and a reinforcing panel that is provided inside the lower panel. The first cross member structure for a vehicle according to claim 1, wherein a closed cross section is formed between the provided protrusion and the reinforcing panel. 3. The first cross member extends upward over the entire surface of the lower panel in the vehicle width direction, and the engine room harness and the radiator are arranged in parallel in the vehicle width direction on the upper surface of the upper panel behind the extending portion. The first cross member structure for a vehicle according to claim 1 or 2, characterized in that.