JP2009132260A - Front part construction of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve impact absorbing performance and collision safety of a front part structure of a vehicle by enhancing dispersibility of collision load from a bumper reinforcement. <P>SOLUTION: The structure is equipped with an intermediate cross member 25 extending to the vehicle-width direction to be mounted to a pair of front side frames 22 at a rear side of the bumper reinforcement 23. An intermediate part 23c in the vehicle-width direction between the pair of front side frame 22 and a connection part 23a of the bumper reinforcement 23 is connected to the intermediate cross member 25. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle front structure, and particularly relates to a vehicle width direction intermediate portion of a bumper reinforcement connected to an intermediate cross member on the rear side of the bumper reinforcement.

  Generally, in the front structure of a vehicle such as an automobile, the front end of the passenger compartment is partitioned by a dash panel (the passenger compartment and the engine compartment), and a pair of left and right front side frames extend forward from the dash panel. A bumper reinforcement that is long in the vehicle width direction (hereinafter referred to as “bumper rain”) is attached to the front end side of the front side frame of the vehicle, and this bumper rain is covered with a bumper member that forms the front exterior surface of the vehicle (for example, patent References 1-3).

  In many cases, the bumper train is curved slightly in a convex manner on the whole, but including such a bumper train, the bumper train is basically formed so as to extend substantially straight in the vehicle width direction. Also, a pair of crash cans that can absorb a collision load is attached to the front end portions of a pair of front side frames, and a bumper rain is connected to the pair of crash cans.

  Here, the applicant of the present invention forms a recess recessed backward in the center part of the dash panel (dash lower panel) in the vehicle width direction, the rear end of the engine is accommodated in the recess, and the engine is positioned more than the axle position of the front wheel. A vehicle in which an engine is rearwardly arranged in an engine room so as to be located rearward has been put into practical use (see Patent Documents 1 to 3, etc.).

  In the front structure of a vehicle in Patent Documents 1 and 3, an intermediate cross member extending in the vehicle width direction on the rear side of the bumper rain is attached to a pair of front side frames. In the structure in Patent Document 1, a radiator is disposed behind the bumper rain. Is arranged in a forward leaning posture, a battery is disposed above the intermediate cross member, and in the structure of Patent Document 3, a front trunk box is disposed between the bumper rain and the intermediate cross member. In the front structure of the vehicle disclosed in Patent Documents 2 and 3, a radiator is disposed in a vertical posture immediately in front of the engine at a position relatively spaced rearward from the bumper rain, and an air cleaner is disposed in front of the engine and above the radiator. ing.

JP 2003-326981 A JP 2005-28911 A JP 2005-29057 A

  In the conventional front structure of the vehicle, the bumper rain is connected to the front end side of the pair of front side frames, and the collision load input to the bumper rain is mainly applied to the pair of front side frames from the front end side during the vehicle collision. Therefore, the dispersibility of the collision load from the bumper rain is low. Therefore, the intermediate portion in the vehicle width direction between the connection portion of the bumper rain with the pair of front side frames is damaged due to inappropriate bending or the like. Even if a pair of crash cans is attached to the front ends of a pair of front side frames and a bumper rain is connected to the pair of crash cans, there is a limit to improving impact safety as well as impact absorption performance. .

  Further, in the conventional front structure of the vehicle, the bumper rain is formed so as to extend substantially straight in the vehicle width direction, and therefore there is a limit in retreating the position of the connecting portion of the bumper rain with the pair of front side frames. Therefore, it is possible to retreat the center of gravity of the heavy bumper rain, shorten the front overhang, reduce the yaw moment of inertia of the vehicle, improve the steering stability (handling performance) of the vehicle, etc. There is a limit.

  In vehicles where the engine is placed rearward in the engine compartment so that the engine is located behind the axle position of the front wheels, the yaw moment of inertia is reduced and steering stability is improved. However, the above problem is an obstacle.

  Further, in the conventional front structure of the vehicle, the bumper rain is formed so as to extend substantially straight in the vehicle width direction, and there is a limit in retracting the position of the connecting portion of the bumper rain with the pair of front side frames. The dead space in the front-rear direction may become large in the engine room, and this problem becomes particularly noticeable when the engine is arranged in the engine room so that the engine is located behind the front wheel axle position. There is also a problem that the degree of freedom of design including the shape of the bumper member that forms the front exterior surface of the vehicle is small.

  An object of the present invention is to improve the dispersibility of the collision load from the bumper reinforcement in the front structure of the vehicle, improve the impact safety as well as the impact absorption performance, and further, the bumper reinforcement that is a heavy object Retreating the center of gravity of the engine, partially shortening the front overhang, reducing the yaw moment of inertia of the vehicle, improving the steering stability (handling performance) of the vehicle, For example, the dead space can be reduced, and the degree of freedom in design including the shape of the bumper member that forms the front exterior surface of the vehicle can be improved.

  The front structure of the vehicle according to claim 1 is attached to a dash panel that partitions the front end of the passenger compartment, a pair of left and right front side frames extending forward from the dash panel, and a front end side of the pair of front side frames. A vehicle front structure having a bumper reinforcement that is long in the vehicle width direction and a bumper member that covers the bumper reinforcement, and extends in the vehicle width direction on the rear side of the bumper reinforcement. An intermediate cross member attached to the pair of front side frames is provided, and an intermediate portion in the vehicle width direction between the connection portions of the bumper reinforcement and the pair of front side frames is connected to the intermediate cross member. It is characterized by that.

  In this vehicle front structure, a bumper reinforcement that is long in the vehicle width direction is attached to the front end sides of the pair of left and right front side frames, and an intermediate cross member that extends in the vehicle width direction on the rear side of the bumper reinforcement is provided. Since it is attached to the pair of front side frames and the intermediate portion in the vehicle width direction between the connecting portions of the bumper reinforcement and the pair of front side frames is connected to the intermediate cross member, The collision load input to the bumper reinforcement is transmitted from the front end side to the pair of front side frames, and is transmitted to the intermediate cross member from the intermediate cross member in the middle of the pair of bumper reinforcement in the length direction. Therefore, the dispersibility of the collision load from the bumper reinforcement is increased.

The following configuration can be adopted as a dependent claim of claim 1.
The intermediate portion in the vehicle width direction and the intermediate cross member are connected via an intermediate crush can capable of absorbing a collision load. The bumper reinforcement has an intermediate retreat portion that is retreated so as to be located rearward of the front end portion of the front side frame at the intermediate portion in the vehicle width direction, and the intermediate retreat portion is coupled to the intermediate cross member. (Claim 3).

  The bumper member has a bumper member intermediate retracted portion that is retracted along the intermediate retracted portion. A pair of left and right intermediate cross connecting members that connect the intermediate cross member and a portion of the pair of front side frames located behind the intermediate cross member, each of which moves outward in the vehicle width direction toward the rear. And a pair of left and right intermediate cross connecting members arranged in an inclined shape.

  A pair of crash cans capable of absorbing a collision load is attached to the front end portions of the pair of front side frames, and a bumper reinforcement is connected to the pair of crash cans (Claim 6). A power train is disposed in front of the dash panel and between the pair of front side frames.

  According to the vehicle front structure of claim 1, the vehicle further comprises an intermediate cross member that extends in the vehicle width direction on the rear side of the bumper reinforcement and is attached to a pair of front side frames, Since the intermediate portion in the vehicle width direction between the connecting portions with the pair of front side frames is connected to the intermediate cross member, the intermediate cross member increases the torsional rigidity of the vehicle body and the bumper reinforcement in the event of a vehicle collision. Is transmitted to the pair of front side frames from the front end side, is transmitted to the intermediate cross member, and is transmitted from the intermediate cross member to the middle portion in the length direction of the pair of front side frames, Therefore, the dispersibility of the collision load from the bumper reinforcement is increased, and the bumper reinforcement In order to prevent the intermediate part in the width direction from being damaged due to improper bending, etc., to improve impact safety as well as impact absorption performance, and to support and support the intermediate cross member with various vehicle equipment It can also be used effectively.

  According to the vehicle front structure of claim 2, the vehicle width direction intermediate portion of the bumper reinforcement and the intermediate cross member are connected via the intermediate crush can capable of absorbing the collision load. Collision safety is further improved.

  According to the vehicle front portion structure of the third aspect, the bumper reinforcement has an intermediate retreat portion that is retreated so as to be located rearward of the front end portion of the front side frame at the vehicle width direction intermediate portion. Even if there is a limit in retreating the position of the connection part of the bumper reinforcement with the front side frame, the center of gravity of the bumper reinforcement that is a heavy load is retreated, and the front over in the center part in the vehicle width direction Hang can be shortened, vehicle yaw moment of inertia can be reduced, vehicle handling stability (handling performance) can be improved, front and rear dead space in the engine room can be reduced, and the front exterior surface of the vehicle can be formed This bumper reinforcement can improve the design freedom including the shape of the bumper member Since the intermediate retraction part is connected to the intermediate cross member, the intermediate cross member is properly arranged so as not to move too far forward, and the bumper reinforcement and the intermediate cross member are securely connected to stabilize the bumper reinforcement. Thus, the dispersibility of the collision load from the bumper reinforcement can be enhanced.

  According to the vehicle front structure of the fourth aspect, the bumper member has the bumper member intermediate retracted portion that is retracted along the intermediate retracted portion of the bumper reinforcement. It can be recessed to improve the design of the bumper member.

  According to the front structure of the vehicle of claim 5, the pair of left and right intermediate cross connecting members that connect the intermediate cross member and a portion of the pair of front side frames positioned rearward of the intermediate cross member. In addition, since the pair of left and right intermediate cross connecting members arranged in an inclined manner that shifts outward in the vehicle width direction toward the rear is provided, the vehicle body torsional rigidity of the vehicle is further increased by the pair of intermediate cross connecting members. In addition, the collision load received by the intermediate cross member and the pair of intermediate cross connection members from the bumper reinforcement during a vehicle collision can be distributed and transmitted to the pair of front side frames. The dispersibility of the load can be further increased. Especially, even in the case of an offset collision, the collision load input from diagonally forward can be changed in the input direction of the collision load. One intermediate cross connecting member extending in the right direction can be reliably received and transmitted to the front side frame, and a pair of intermediate cross connecting members can be effectively used to connect and support various vehicle equipment. You can also.

  According to the front structure of the vehicle of claim 6, a pair of crash cans capable of absorbing a collision load is attached to the front ends of the pair of front side frames, and a bumper reinforcement is connected to the pair of crash cans. Therefore, the collision safety is further improved together with the impact absorbing performance.

  According to the front structure of the vehicle of the seventh aspect, since the power train is disposed in front of the dash panel and between the pair of front side frames, the power train has a low center of gravity, and the steering stability of the vehicle is improved. In addition, it is advantageous when the engine is disposed in the rear of the engine room so that the engine is located behind the axle position of the front wheels, thus reducing the yaw moment of inertia and improving the steering stability. It becomes possible to plan further.

  The vehicle front structure of the present invention includes a dash panel that partitions the front end of a vehicle compartment, a pair of left and right front side frames that extend forward from the dash panel, and a vehicle width direction that is attached to the front end side of the pair of front side frames. A bumper reinforcement that has a long bumper reinforcement, a bumper member that covers the bumper reinforcement, an intermediate cross member that extends in the vehicle width direction on the rear side of the bumper reinforcement and is attached to a pair of front side frames. An intermediate part in the vehicle width direction between the connection parts of the pair with the pair of front side frames is connected to the intermediate cross member.

  As shown in FIGS. 1 to 4, a vehicle 1 (automobile 1) includes a pair of left and right front wheels 2 and a pair of left and right rear wheels 3, and an engine 5 is mounted in an engine room 4 at the front of the vehicle 1. This is an FR vehicle in which the engine 5 drives the rear wheels 3.

  A front structure 20 of the vehicle 1 includes a dash panel 21 that partitions the front end of the compartment 6 (the compartment 6 and the engine room 4), a pair of left and right front side frames 22 that extend forward from the dash panel 21. A bumper reinforcement 23 (hereinafter referred to as a “bumper rain 23”) that is attached to the front end side of the front side frame 22 and extends in the vehicle width direction on the rear side of the bumper rain 23. An intermediate cross member 25 is mounted on a pair of front side frames 22.

  A front end portion of a floor panel 7 that forms the floor of the passenger compartment 6 is coupled to the lower end portion of the dash panel 21, and a pair of left and right side sills 8 are coupled to both ends of the floor panel 7 in the vehicle width direction. A rear end portion of the pair of front side frames 22 extends downward along the front surface of the dash panel 21 and is coupled to the lower surface of the floor panel 7 at the lower end portion of the dash panel 21 and extends in the front-rear direction. The front end of the floor frame 9 is coupled.

  The vehicle interior 6 includes a dashboard 10, a steering wheel 11, a pair of left and right front seats 12, a pair of left and right rear seats 13, and the like. (See FIG. 4). Note that reference numeral 15 in FIG. 4 denotes a pair of left and right headlamps, and reference numeral 16 in FIG. 4 denotes a pair of left and right side mirrors.

The front structure 20 of the vehicle 1 will be described in detail.
The engine room 4 is formed in a portion surrounded by a dash panel 21, a pair of left and right front apron members 30 coupled to the dash panel 21, a bumper member 24, and the like, and is opened and closed by a bonnet 31. The bonnet 31 has a rear end portion hinged to a cowl member (not shown) on the upper end side of the dash panel 21, and is rotated up and down around the rear end portion to open and close.

  A pair of crash cans 26 capable of absorbing a collision load are attached to the front end portions of the pair of front side frames 22, and an intermediate portion capable of absorbing the collision load at a front end portion in the center in the vehicle width direction of the intermediate cross member 25. A crash can 27 is attached, and a bumper rain 23 is connected to the crash cans 26 and 27.

  The bumper rain 23 has a connecting portion 23 a (connected to the pair of front side frames 22) with the pair of front side frames 22 and a pair of left and right frame front sides located on the front side of the pair of front side frames 22. The vehicle width direction intermediate portion 23c between the portion 23b and the pair of connecting portions 23a (the frame front side portion 23b), and a pair of left and right vehicle widths outside the pair of the connecting portions 23a (the frame front side portion 23b) in the vehicle width direction. It has a direction outer side portion 23d.

  The pair of frame front side portions 23b is the foremost end portion of the bumper rain 23, and is formed, for example, such that its front end face faces forward. The vehicle width direction intermediate portion 23c is formed so as to be retracted as a whole from the connecting portion 23a, and has an intermediate retracted portion 23e that is retracted so as to be positioned rearward of the front end portion of the front side frame 22.

  The vehicle width direction intermediate portion 23c is connected to the left and right inclined portions extending substantially straight inward and rearward in the vehicle width direction from the pair of frame front side portions 23b at the center in the vehicle width direction, and opens forward in plan view. It is formed in a V-shape, and the connecting portion and its vicinity become an intermediate retreat portion 23e, and an intermediate cross member 25 is disposed a little rearward from the intermediate retraction portion 23e, so that the intermediate retraction portion 23e and the intermediate cross member 25 are disposed. Are connected via an intermediate crash can 27.

  The pair of vehicle width direction outer side portions 23d includes an outer retreating portion 23f that is retreated so as to be located rearward of the connecting portion 23a. The pair of vehicle width direction outer side portions 23d are formed of left and right inclined portions extending substantially straight outward and rearward in the vehicle width direction from the pair of frame front side portions 23b, respectively.

  As described above, the bumper rain 23 has an M-shape that is extended in the vehicle width direction in plan view by the pair of frame front side portions 23b, the vehicle width direction intermediate portion 23c, and the pair of vehicle width direction outer side portions 23d. Is formed. The bumper rain 23 has a closed cross-sectional structure, for example, by hydroforming or by joining two members. A bumper rain having an open cross-sectional structure with a U-shaped cross section may be adopted as the bumper rain 23.

  The bumper member 24 extends forward so as to be substantially continuous from the pair of front apron members 30 and the bonnet 31 to form a front exterior surface of the vehicle 1. A portion of the bumper member 24 positioned on the front side of the bumper rain 23 is The shape is generally formed along the bumper rain 23. A cushioning member made of urethane foam or the like may be provided between the bumper rain 23 and the bumper member 24 so as to be attached to the bumper rain 23.

  That is, the bumper member 24 includes a pair of bumper member frame front side portions 24b and a bumper member vehicle width corresponding to the pair of frame front side portions 23b, the vehicle width direction intermediate portion 23c, and the pair of vehicle width direction outer side portions 23d. The direction intermediate portion 24c has a pair of bumper member vehicle width direction outer side portions 24d, and the bumper member vehicle width direction intermediate portion 24c corresponds to the intermediate retracted portion 23e, that is, retracted along the intermediate retracted portion 23e. A bumper member intermediate retreating portion 24e is provided.

  The intermediate cross member 25 has a square tube-like closed cross-sectional structure, both ends in the vehicle width direction are welded to a pair of front side frames 22, and the intermediate crash can 27 is bolted to the intermediate cross member 25. In addition, about the structure of the said welding and a bolt coupling | bonding, you may provide a flange in the intermediate cross member 25 and the intermediate crush can 27 suitably, and may utilize it. As the intermediate cross member 25, an intermediate cross member having a band plate shape or an open cross-sectional structure may be adopted.

  In the engine room 4, the engine 5, which is a power train, is largely below the upper end of the front side frame 22 in front of the dash panel 21, behind the intermediate cross member 25, and between the pair of front side frames 22. It arrange | positions so that it may become a position. A concave portion 21a that is recessed rearward is formed in the vehicle width direction center portion of the dash panel 21, and the rear end portion of the engine 5 is accommodated in the concave portion 21a so that the engine 5 is positioned rearward of the axle position of the front wheel 2. It is arranged behind the engine room 4.

  The driving force of the engine 5 is transmitted to the pair of rear wheels 3 through the transmission 40, the propeller shaft 41, the differential device 42, and the pair of left and right rear axles 43. The transmission 40, the propeller shaft 41, etc. The panel 7 is disposed inside (on the lower surface side) an upward convex tunnel portion (not shown) formed at the center in the vehicle width direction.

  A suspension cross member 45 for supporting a front suspension (not shown), a power steering device 46 for steering the front wheels 2, and a cooling unit 47 having a radiator and a cooling fan are disposed on the lower end side of the engine room 4. .

  The cooling unit 47 has a width in the vehicle width direction that is substantially the same as the distance between the pair of front side frames 22, is located below the front side frame 22, and has an intermediate retracted portion 23 e and an intermediate cross member 25 of the bumper rain 23. On the lower side, the suspension cross member 45 and the power steering device 46 are disposed in a rearward tilting posture so as not to interfere with each other.

  As shown in FIG. 4, the bumper member 24 is formed with an air introduction port 24f for introducing running air to cool at least the radiator of the cooling unit 47, and a bumper grille 24g is attached to the air introduction port 24f. An air duct that guides the traveling wind from the air inlet 24f to the cooling unit 47 may be provided. In the engine room 4, vehicle equipment such as an oil cooler, an air cleaner, and a battery (not shown) are arranged in a predetermined arrangement.

The front structure 20 of the vehicle 1 described above has the following effects.
An intermediate cross member 25 that extends in the vehicle width direction on the rear side of the bumper rain 23 and is attached to a pair of front side frames 22 is provided between the connecting portions 23 a of the bumper rain 23 and the pair of front side frames 22. Since the intermediate portion 23c in the vehicle width direction is connected to the intermediate cross member 25, the intermediate cross member 25 increases the torsional rigidity of the vehicle body of the vehicle 1, and the collision load input to the bumper rain 23 at the time of the vehicle collision is a pair. It is transmitted to the front side frame 22 from the front end side, and is transmitted to the intermediate cross member 25 and transmitted from the intermediate cross member 25 to the middle part in the length direction of the pair of front side frames 22. The dispersibility of the load is increased, and the intermediate portion 23c in the vehicle width direction of the bumper rain 23 is bent inappropriately. Prevented from being damaged by such that, it is possible to improve the collision safety with shock absorbing capacity, it can also effectively utilized to to the intermediate cross member 25 connecting supporting various vehicle accessory.

  Moreover, since the vehicle width direction intermediate portion 23c of the bumper rain 23 and the intermediate cross member 25 are connected via the intermediate crash can 27 that can absorb the collision load, the bumper rain 23 also collides with the front end portions of the pair of front side frames 22. Since the pair of crash cans 26 capable of absorbing the load is attached and the bumper rain 23 is connected to the pair of crash cans 26, the impact safety and the collision safety are further improved.

  Further, the bumper rain 23 has a vehicle width direction intermediate portion 23c formed between the connection portion 23a with the pair of front side frames 22 so as to be retracted from the connection portion 23a. The intermediate part 23 c has an intermediate retreat part 23 e that is retreated so as to be located behind the front end part of the front side frame 22.

  Therefore, even if there is a limit in retreating the position of the connecting portion 23a, the center of gravity of the bumper rain 23 that is a heavy object can be retreated to shorten the front overhang at the center portion in the vehicle width direction. A bumper member that can reduce the yaw moment of inertia, improve the steering stability (handling performance) of the vehicle 1, reduce the front and rear dead space of the engine room 4, and form the front exterior surface of the vehicle 1. The degree of freedom of design including 24 shapes can be improved.

  In particular, in this vehicle 1, the engine 5 is positioned rearward of the axle position of the front wheels 2 and is disposed rearward in the engine room 4 with a low center of gravity, thereby reducing the yaw moment of inertia and improving the steering stability. However, such an improvement can be further achieved by providing the bumper rain 23 with the intermediate retreating portion 23e, and the rearward arrangement of the engine 5 allows the conventional bumper rain to be installed in the engine room 4 in the front-rear direction. However, the above-described effect can be exhibited while reliably reducing the dead space.

  The bumper rain 23 has an outer retreating portion 23f that is retreated so as to be located rearward of the connecting portion 23a in the vehicle width direction outer side portion 23d of the connecting portion 23a. The front overhang at both ends in the vehicle width direction can be shortened, the yaw moment of inertia of the vehicle 1 can be reduced, the steering stability of the vehicle 1 can be improved, and the degree of freedom in designing the bumper member 24 can be further improved.

  Since the frame front side portion 23b, which is the foremost end portion of the bumper rain 23, has a connecting portion 21a, the position of the connecting portion 21a is not retracted from the conventional position, but the center of gravity of the bumper rain 23 is retracted, thereby causing a front overhang. It can be partially shortened, and when a collision occurs, a collision weight is often input from the frame front side portion 23b of the bumper rain 23. Therefore, the function of the crash can 26 is surely exhibited to improve the collision safety. Can do.

  Since the bumper member 24 has a bumper member intermediate retracted portion 24e that is retracted along the intermediate retracted portion 23e of the bumper rain 23, the central portion of the bumper member 24 in the vehicle width direction is recessed backward, and the design of the bumper member 24 is improved. Can be increased.

  Since the engine 5, which is a power train, is disposed in front of the dash panel 21 and between the pair of front side frames 22, the engine 5 has a low center of gravity to further improve the steering stability of the vehicle 1. This is advantageous when the engine 5 is disposed in the rear of the engine room 4 so that the engine 5 is located rearward of the axle position of the front wheel 2, thus further reducing the yaw moment of inertia and improving the steering stability. It becomes possible to plan.

  The intermediate crash can 27 may be omitted, and the vehicle width direction intermediate portion 23c of the bumper rain 23 may be connected to the intermediate cross member 25 without the intermediate crash can 27 interposed. In this case, the intermediate cross member 25 may be connected via some connecting member. Such a configuration can also be employed in a vehicle front structure according to a modification described below.

  Next, a front structure of a vehicle in which the configuration of the main embodiment is partially changed will be described. However, the same or similar components as those in the main embodiment will be described with the same or similar reference numerals, detailed description will be omitted as appropriate, and the basically same effects as those in the main embodiment will be described. Is omitted.

1] As shown in FIGS. 5 and 6, the vehicle front structure 20 </ b> A according to the first modification includes a portion located behind the intermediate cross member 25 </ b> A in the pair of front side frames 22 and the intermediate cross member 25 </ b> A. A pair of left and right intermediate cross connecting members 28 for connecting the left and right intermediate cross connecting members 28, each of which is disposed in an inclined shape so as to move outward in the vehicle width direction toward the rear.

  Due to the provision of the pair of intermediate cross connecting members 28, the intermediate cross member 25 A is disposed slightly in front of the intermediate cross member 25, and the intermediate crash can 27 A is formed slightly shorter than the intermediate crash can 27. However, the same material as the intermediate cross member 25 and the intermediate crash can 27 may be adopted.

  The front end portions of the pair of intermediate cross connecting members 28 are coupled to the central portion of the intermediate cross member 25A in the vehicle width direction so as to be adjacent to each other in the vehicle width direction, and the rear end portions of the pair of intermediate cross connecting members 28 are connected to the engine 5 The engine 5 is disposed in a portion surrounded by a dash panel 21, a pair of front side frames 22, and a pair of intermediate cross connecting members 28.

  According to the front structure 20A of the vehicle, the pair of intermediate cross connecting members 28 further increases the torsional rigidity of the vehicle body, and the intermediate cross member 25A and the pair of intermediate cross connecting members 28 are bumper rain when the vehicle collides. The collision load received from the vehicle 23 can be distributed and transmitted to the pair of front side frames 22, so that the dispersion of the collision load from the bumper rain 23 can be further increased. The collision load to be generated can be reliably received by one intermediate cross connecting member 28 extending in a direction close to the input direction of the collision load and transmitted to the front side frame 22, and the pair of intermediate cross connecting members 28 Can be effectively used to connect and support various vehicle equipment.

  In the vehicle front structure of the following modification, the pair of intermediate cross connection members 28 as in Modification 1 are not provided, but a similar pair of intermediate cross connection members may be provided.

2] In the front structure 20B of the vehicle of Modification 2 shown in FIG. 7, in the bumper rain 23B, the vehicle width direction intermediate portion 23Bc is positioned in front of the front end portion of the front side frame 22 in plan view. The vehicle-width direction intermediate portion 23Bc is connected to the intermediate cross member 25B via a pair of left and right intermediate crash cans 27B. Note that one intermediate crash can 27B may be provided in the center in the vehicle width direction.

3] In the vehicle front structure 20C of Modification 3 shown in FIG. 8, the bumper rain 23C extends substantially straight in the vehicle width direction so as to be curved in a slightly convex manner on the whole, and the bumper rain 23C extends in the vehicle width direction. The intermediate portion 23Cc is connected to the intermediate cross member 25C via the intermediate crash can 27C.

4] As shown in FIGS. 9 and 10, in the vehicle front structure 20 </ b> D according to the modified example 4, an oil cooler 48, which is a pair of left and right vehicle accessories, is provided at a position near the rear of the intermediate retreating portion 23 e of the bumper rain 23. They are arranged symmetrically. Each oil cooler 48 has substantially the same width in the vehicle width direction as the distance between the front side frame 22 and the intermediate crash can 27, and the front side frame 22, the bumper rain 23, the intermediate cross member 25, and the crash can in plan view. In a portion surrounded by 26 and 27, the front portion is arranged in a vertical posture so as to face slightly forward and inward.

  The oil cooler 48 has an upper end located at the same height as the main part of the front side frame 22, and most of the oil cooler 48 is located below the lower end of the main part of the front side frame 22. The frame 22 and the bumper rain 23 are connected and supported. An air duct that guides the traveling wind from the air inlet 24f to the oil cooler 48 may be provided.

  The cooling unit 47D is located below the front side frame 22 and does not interfere with the suspension cross member 45, the power steering device 46, and the oil cooler 48 below the intermediate retreating portion 23e of the bumper rain 23 and the intermediate cross member 25. As described above, the oil cooler 48 is disposed in a backward inclined posture from the rear to the bottom.

  According to the vehicle front structure 1D, the oil cooler 48 is disposed in the vicinity of the rearward position of the intermediate retreating portion 23e of the bumper rain 23. Therefore, the position of the rearward vicinity of the intermediate retreating portion 23e is effectively used for the arrangement of the oil cooler 48. On the other hand, the intermediate cross member 25 can be disposed, and the front overhang at the center in the vehicle width direction can be reliably shortened.

5] In the vehicle front structure 20E of Modification 5 shown in FIG. 11, in the bumper rain 23E, the vehicle width direction intermediate portion 23Ec is formed in a concave shape that opens forward in plan view. In the vehicle width direction intermediate portion 23Ec, the ratio of the intermediate receding portion 23Ee is larger than that of the front structure 20 of the vehicle. In the bumper member 24, a portion located on the front side of the vehicle width direction intermediate portion 23Bc may be retracted along the vehicle width direction intermediate portion 23Ec as indicated by a virtual line.

6] In the vehicle front structure 20F of Modification 6 shown in FIG. 12, in the bumper rain 23F, the pair of vehicle width direction outer side portions 23Fd are respectively substantially outward in the vehicle width direction from the pair of frame front side portions 23b. It is formed to extend straight.

7] In the vehicle front structure 20G of Modification 7 shown in FIG. 13, the pair of crash cans 26 is omitted, and accordingly, the pair of left and right front side frames 22G are located forward of the front side frame 22. The bumper rain 23 is directly connected to the front end portions of the pair of front side frames 22G.

8] In the vehicle front structure 20H of the modified example 8 shown in FIG. 14, in the bumper rain 23H, the vehicle width direction intermediate portion 23Hc has its vehicle width direction both end portions 23Hc1 slightly projecting forward from the frame front side portion 23Hb. Between the vehicle width direction both ends 23Hc1, it is formed so as to retreat more than the vehicle width direction both ends 23Hc1, and has an intermediate retreat portion 23He.

9] In the vehicle front structure 20I of the modified example 9 shown in FIG. 15, in the bumper member 24I, the bumper member vehicle width direction intermediate portion 24Ic omits the bumper member intermediate retracted portion 24e, and the bumper rain 23 has a vehicle width direction. It is formed in a shape that is gently recessed on the front side of the intermediate portion 23c.

10] In the vehicle front structure 20J of the modified example 10 shown in FIG. 16, in the bumper member 24J, the bumper member vehicle width direction intermediate portion 24Jc omits the bumper member intermediate retracted portion 24e and adopts a conventional bumper rain. As in the case, it is formed in a shape that is curved slightly convex forward as a whole.

11] As shown in FIGS. 17 and 18, in the vehicle front structure 20K according to the modification 11, the bumper member 24K has a bumper member width direction intermediate portion 24Kc similar to that of the vehicle front structure 20J in FIG. In addition, the bumper member intermediate retreating portion 24e is omitted, and, as in the case where a conventional bumper rain is adopted, the entire bumper member is formed in a shape curved slightly forward.

  Similarly to the air introduction port 24f and the bumper grille 24g, an air introduction port 24Kf for introducing running wind is formed in the bumper member vehicle width direction intermediate portion 24Kc, and the bumper grille 24Kg is attached to the air introduction port 24Kf. On the upper side of the air introduction port 24Kf, an upper air introduction port 24Kh for introducing traveling wind for generating downforce is formed, and an upper bumper grill 24Ki is mounted on the upper air introduction port 24Kh.

  The upper air introduction port 24Kh is located on the front side of the vehicle width direction intermediate portion 23c of the bumper rain 23, and an air passage 51 connecting the upper air introduction port 24Kh and the air discharge port 50 formed on the front end side of the bonnet 31 is provided. It is provided so as to pass through the upper side from the front side of the vehicle width direction intermediate portion 23c. A spoiler 52 having a wing-shaped cross section is provided on the upper side of the air passage 51, and the spoiler 52 generates a down force according to a well-known wing theory when the vehicle travels.

  According to the vehicle front structure 20K, the bumper rain 23 is formed such that the vehicle width direction intermediate portion 23c between the connecting portions 23a with the pair of front side frames 22 is retracted from the connecting portions 23a. The vehicle width direction intermediate portion 23c has the intermediate retreating portion 23e that is retreated so as to be located rearward of the front end portion of the front side frame 22. Thus, as described above, the upper air introduction port 24Kh is provided with the vehicle width. The air passage 51 can be provided so as to pass through the upper side from the front side of the vehicle width direction intermediate portion 23c, and is located on the front side of the direction intermediate portion 23c. Therefore, the spoiler 52 is formed in a shape that can generate more downforce. Can be provided.

12] The front structure of the vehicle may be configured by combining the configurations of the main embodiment and the configurations of Modifications 1 to 11 if possible.

13] In addition, various configurations other than the disclosed items can be added and implemented without departing from the gist of the present invention, and the present invention is not limited to the vehicle disclosed in the embodiments, and is an FF vehicle. It is applicable to various vehicles such as.

It is a principal part plane sectional view containing the front part structure of a vehicle. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is a perspective view from the front diagonal upper side of a vehicle. FIG. 10 is a plan cross-sectional view of a main part of a front structure of Modification 1. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. FIG. 10 is a plan cross-sectional view of a main part of a front structure of Modification 2. FIG. 10 is a plan cross-sectional view of a main part of a front structure of Modification 3. FIG. 10 is a plan cross-sectional view of a main part of a front structure according to Modification 4. FIG. 10 is a sectional view taken along line XX in FIG. 9. FIG. 10 is a plan cross-sectional view of a main part of a front structure of Modification 5. FIG. 10 is a plan cross-sectional view of a main part of a front structure of Modification 6. FIG. 10 is a plan cross-sectional view of a main part of a front structure of Modification 7. FIG. 10 is a plan cross-sectional view of a main part of a front structure according to Modification 8. FIG. 10 is a plan sectional view of a main part of a front structure according to Modification 9. 14 is a plan cross-sectional view of a main part of a front structure of Modification 10. FIG. FIG. 12 is a perspective view from the diagonally upper front side of a vehicle according to Modification 11; FIG. 12 is a longitudinal sectional view of an essential part including a front structure of a vehicle according to Modification 11;

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 5 Engine 6 Cabin 20, 20A, 20B, 20C, 20D, 20E, 20F, 20G, 20H, 20I, 20J, 20K Front structure 21 Dash panel 22, 22G Front side frame 23, 23B, 23C, 23E, 23F, 23H Bumper reinforcement (Bumper rain)
23a Connecting portion 23c, 23Bc, 23Cc, 23Ec, 23Hc Intermediate width member 23e, 23Ee, 23He Intermediate retracted portion 24, 24I, 24J, 24K Bumper member 24e Bumper member intermediate retracted portion 25, 25A, 25B, 25C Intermediate cross member 26 Crash Can 27, 27A, 27B, 27C Intermediate Crash Can 28 Intermediate Cross Connection Member

Claims (7)

A dash panel that partitions the front end of the passenger compartment, a pair of left and right front side frames that extend forward from the dash panel, and a bumper reinforcement that is long on the front end side of the pair of front side frames and that extends in the vehicle width direction. A front structure of the vehicle including a bumper member covering the bumper reinforcement,
An intermediate cross member extending in the vehicle width direction on the rear side of the bumper reinforcement and attached to a pair of front side frames;
A vehicle front structure characterized in that an intermediate portion in the vehicle width direction between connecting portions of the bumper reinforcement and a pair of front side frames is connected to an intermediate cross member.   The vehicle front structure according to claim 1, wherein the vehicle width direction intermediate portion and the intermediate cross member are connected via an intermediate crush can capable of absorbing a collision load. The bumper reinforcement has an intermediate retreat portion that is retreated so as to be located rearward of the front end portion of the front side frame at the intermediate portion in the vehicle width direction.
The vehicle front structure according to claim 1, wherein the intermediate retreating portion is connected to an intermediate cross member.   The vehicle front structure according to claim 3, wherein the bumper member has a bumper member intermediate retracted portion that is retracted along the intermediate retracted portion.   A pair of left and right intermediate cross connecting members for connecting the intermediate cross member and a portion of the pair of front side frames located behind the intermediate cross member, each of which moves outward in the vehicle width direction toward the rear. The vehicle front part structure according to any one of claims 1 to 4, further comprising a pair of left and right intermediate cross connecting members arranged in an inclined shape.   The pair of crash cans capable of absorbing a collision load is attached to the front end portions of the pair of front side frames, and a bumper reinforcement is connected to the pair of crash cans. The front structure of the vehicle according to any one of claims 5 to 6.   The vehicle front structure according to any one of claims 1 to 6, wherein a power train is disposed in front of the dash panel and between the pair of front side frames.