JP2009184616A - Front structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To retreat the position of the center of gravity of a heavy bumper reinforcement, partially shorten a front overhang, to reduce the yaw inertia moment of a vehicle, to enhance the steering stability (handling performance) of the vehicle, and to improve the repairability of the bumper reinforcement of the collided vehicle, in a front structure of a vehicle. <P>SOLUTION: The bumper reinforcement 23 comprises, in a vehicle lateral intermediate part 23c between a pair of front side frames 22 and a connection part 23a, a pair of left and right vertical bumper reinforcement sections 23g extending rearward of the connection part 23a in parallel to the pair of front side frames 22, and a lateral bumper reinforcement section 23h the vehicle lateral both ends of which are connected to the rear ends of the pair of vertical bumper reinforcement sections 23g and which extends in the vehicle lateral direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a front structure of a vehicle, and in particular, a pair of left and right bumper reinforcements extending rearward of the connecting portion at a middle portion in a vehicle width direction between connecting portions with a pair of front side frames. A vertical bumper rain portion and a lateral bumper rain portion extending in the vehicle width direction by connecting both ends in the vehicle width direction to the rear end portions of the pair of vertical bumper rains are provided.

  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 a vehicle, since the bumper rain is formed so as to extend substantially straight in the vehicle width direction, there is a limit in retracting the position of the connection portion between the pair of front side frames of the bumper rain. Therefore, it is limited to retreating the center of gravity of the heavy bumper rain, shortening the front overhang, reducing the yaw moment of inertia of the vehicle, improving the steering stability (handling performance) of the vehicle, etc. There is.

  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. The above problem is an obstacle to this demand.

  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.

  Therefore, the inventor of the present application is a part of the present invention, but in the front structure of the vehicle, the intermediate portion in the vehicle width direction between the connection portion of the bumper rain with the pair of front side frames is more than the connection portion. We examined the practical application of the retracted structure. We focused on the fact that there is room for improvement in the repairability due to vehicle collision (front collision) in the bumper train having the middle part in the vehicle width direction.

  In other words, the bumper rain has a middle part in the vehicle width direction that is wide and recessed backward with respect to the connecting part. Therefore, at the time of a vehicle collision, the obstacle cannot be properly received and the collision load cannot be transmitted to other vehicle body members. In particular, assuming that the intermediate portion in the vehicle width direction is formed in a V-shape that is convex backward in plan view, the inclined portion that forms the V-shape collides in strength and rigidity. There is a high possibility that the bumper rain will be greatly damaged and the repair cost of the bumper rain will be expensive due to problems such as being low with respect to the object, that is, easily damaged, and being easily hit by the obstacle. Therefore, it is necessary to suppress these issues.

  The object of the present invention is to retract the center of gravity of a bumper reinforcement that is a heavy object in the front structure of the vehicle, partially shorten the front overhang, reduce the yaw moment of inertia of the vehicle, Improving vehicle handling stability (handling performance), reducing the dead space in the front-rear direction of the engine room, improving the design freedom including the shape of the bumper member that forms the front exterior surface of the vehicle, Improving the repairability of bumper reinforcements due to vehicle collisions, etc.

  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 comprising a bumper reinforcement that is long in the vehicle width direction and a bumper member that covers the bumper reinforcement, the bumper reinforcement being connected to a pair of front side frames A pair of left and right vertical bumper rain portions extending rearward of the connecting portion in parallel with the pair of front side frames, and a rear end portion of the pair of vertical bumper rain portions. It has a lateral bumper rain portion that extends in the vehicle width direction by connecting both ends in the vehicle width direction.

  The bumper reinforcement has a pair of vertical bumper rain portions and a horizontal bumper rain portion in the vehicle width direction intermediate portion between the connecting portions with the pair of front side frames, and the pair of vertical bumper rain portions is a pair of the vertical bumper rain portions. Parallel to the front side frame, it extends rearward from the connecting portion, the horizontal bumper rain portion extends in the vehicle width direction, and both end portions in the vehicle width direction of the horizontal bumper rain portion are connected to the rear end portions of the pair of vertical bumper rain portions. Therefore, most of the intermediate portion in the vehicle width direction is retracted from the connecting portion. Therefore, the center of gravity of the bumper reinforcement, which is a heavy object, moves backward, and the central portion in the vehicle width direction. The front overhang of the vehicle is shortened, the yaw moment of inertia of the vehicle is reduced, and the steering stability (handling performance) of the vehicle is improved.

  In the bumper reinforcement, the vertical bumper rain part that extends in parallel with the front side frame has higher strength and rigidity (in the front-rear direction) than the collision object. There is a high possibility that an object will be received and a collision load will be transmitted to other vehicle body members, and it will not be easily damaged because the obstacle will not directly hit the vertical bumper rain part, resulting in a bumper reinforcement. This prevents the damage to the bumper reinforcement and the cost of repairing the bumper reinforcement.

The following configuration can be adopted as a dependent claim of claim 1.
A front end portion of the pair of vertical bumper rain portions is formed on a pair of left and right abutting surface portions located at the front end of the bumper reinforcement and facing forward (Claim 2). The bumper reinforcement has an outer receding portion that is receded so as to be positioned rearward of the connecting portion on the outer side in the vehicle width direction of the connecting portion.

  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 (Claim 4). 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 is provided, and the lateral bumper rain portion is connected to the intermediate cross member. The lateral bumper rain portion and the intermediate cross member are connected via an intermediate crush can capable of absorbing a collision load.

  An impact absorbing member is disposed between the lateral bumper rain portion and the bumper member. The bumper member has a bumper member vehicle width direction intermediate portion that is retracted along the vehicle width direction intermediate portion.

  According to the front structure of the vehicle of claim 1, the bumper reinforcement is arranged in the vehicle width direction intermediate portion between the connecting portions with the pair of front side frames, in parallel with the pair of front side frames. Since it has a pair of left and right vertical bumper rain portions extending rearward from the connecting portion, and a lateral bumper rain portion extending in the vehicle width direction by connecting both ends in the vehicle width direction to the rear end portions of the pair of vertical bumper rain portions. Most of the intermediate portion in the vehicle width direction is retracted from the connecting portion. Therefore, the center of gravity of the bumper reinforcement, which is a heavy load, is retracted, and the front over in the center portion in the vehicle width direction is reduced. Hang can be shortened, and therefore, the yaw moment of inertia of the vehicle can be reduced, the steering stability (handling performance) of the vehicle can be improved, and the dead space in the longitudinal direction of the engine room can be improved. To shrink, it is possible to improve the freedom of design, including the shape of the bumper member forming the front exterior surface of the vehicle.

  In the bumper reinforcement, the pair of vertical bumper rain portions extending in parallel with the pair of front side frames has higher strength and rigidity (in the front-rear direction) against the collision object. The possibility of receiving an obstacle and transmitting a collision load to other vehicle body members increases, and the vertical bumper rain part is less likely to hit the obstacle directly so that it is not easily damaged, resulting in bumper reinforcement. This can prevent the damage of the bumper reinforcement and the repair cost of the bumper reinforcement from becoming expensive, and can improve the repairability of the bumper reinforcement due to a vehicle collision.

  According to the front structure of the vehicle of claim 2, the front end portions of the pair of vertical bumper rain portions are formed on the pair of left and right contact surface portions located at the front end of the bumper reinforcement and facing forward. When an obstacle hits the abutting surface during a collision, the obstacle can be reliably received via the vertical bumper rain portion, and the collision load can be reliably transmitted from the vertical bumper rain portion to another vehicle body member.

  According to the front structure of the vehicle of claim 3, the bumper reinforcement has an outer receding portion that is receded so as to be positioned rearward of the connecting portion on the outer side in the vehicle width direction than the connecting portion. Therefore, the position of the center of gravity of the bumper reinforcement can be further retracted to shorten the front overhang at both ends in the vehicle width direction, reducing the yaw moment of inertia of the vehicle, improving the steering stability of the vehicle, and freedom in designing the bumper members The degree can be further improved.

  According to the vehicle front structure of claim 4, 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 claim 5, the intermediate bump member that extends in the vehicle width direction and is attached to the pair of front side frames on the rear side of the bumper reinforcement is provided. Since it is connected to the member, the intermediate cross member increases the torsional rigidity of the vehicle body, and the collision load input to the bumper reinforcement at the time of the vehicle collision is transmitted from the front end side to the pair of front side frames. And transmitted to the intermediate cross member to the middle part of the pair of front side frames in the longitudinal direction. Therefore, the dispersibility of the collision load from the bumper reinforcement is increased, and the bumper reinforcement The middle part of the vehicle in the vehicle width direction is prevented from being damaged due to improper bending, etc. Collision safety can be improved, it can also be effectively utilized an intermediate cross member for connecting supporting various vehicle accessory to.

  According to the vehicle front structure of the sixth aspect, since the lateral bumper rain portion and the intermediate cross member are connected via the intermediate crash can capable of absorbing the collision load, the impact safety and the collision safety are further improved. .

  According to the front structure of the vehicle of claim 7, since the shock absorbing member is disposed between the lateral bumper rain portion and the bumper member, when the obstacle hits the shock absorbing member at the time of the vehicle collision, the obstacle The impact absorbing member can be absorbed by the impact absorbing member, and in this case, the pedestrian as an obstacle can be actively pulled in between the pair of connecting portions to the front side of the lateral bumper rain portion. It is possible to improve the collision safety and to increase the shock absorbing function (collision safety) by increasing the thickness of the shock absorbing member in the front-rear direction without deteriorating the appearance. Bumper reinforcement repairability due to collisions can be further improved.

  According to the front structure of the vehicle of the eighth aspect, the bumper member has the bumper member that is retracted along the intermediate portion in the vehicle width direction, so that the central portion in the vehicle width direction of the bumper member is rearward. It can be recessed to improve the design of the bumper member.

  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 covers the bumper reinforcement and a bumper reinforcement that covers the bumper reinforcement. The bumper reinforcement is a pair of front side frames in the middle in the vehicle width direction between the connecting parts of the pair of front side frames. A pair of left and right vertical bumper rain portions extending rearward from the connecting portion in parallel to the connecting portion, and a lateral bumper rain portion extending in the vehicle width direction by connecting both ends in the vehicle width direction to the rear ends of the pair of vertical bumper rain portions And have.

  As shown in FIGS. 1 to 3, 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 that is a power train in an engine room 4 at the front of the vehicle 1. 5 is an FR vehicle in which the rear wheel 3 is driven by the engine 5.

  As shown in FIGS. 1 to 5, the front structure 20 of the vehicle 1 has a dash panel 21 that partitions the front end of the vehicle compartment 6 (the vehicle compartment 6 and the engine room 4), and a left and right 1 extending forward from the dash panel 21. A pair of front side frames 22, a bumper reinforcement 23 (hereinafter referred to as “bumper rain 23”) that is attached to the front end side of the pair of front side frames 22 and that is long in the vehicle width direction, a bumper member 24 that covers the bumper rain 23, and a bumper rain 23 An intermediate cross member 25 extending in the vehicle width direction on the rear side and attached to a pair of front side frames 22, and an impact absorbing member 26 disposed between the bumper rain 23 and the bumper member 24 are provided.

  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 27 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 28 is attached, and a bumper rain 23 is connected to the crash cans 27 and 28.

  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 the front end portions of the pair of frame front side portions 23b are formed on a vertical surface facing forward. The vehicle width direction intermediate portion 23c is formed so that most of it is retracted from the connecting portion 23a, and a pair of left and right vertical bumper rain portions extending rearwardly of the connecting portion 23a in parallel with the pair of front side frames 22. 23g, and a lateral bumper rain portion 23h extending in the vehicle width direction by connecting both ends in the vehicle width direction to the rear end portion of the pair of vertical bumper rain portions 23g.

  The pair of vertical bumper rain portions 23g are connected to the vehicle width direction inner end portions of the pair of front frame side portions 23b in the front end portions thereof, respectively, in the vehicle width inward vicinity of the pair of front side frames 22 in the front-rear direction. So as to extend straight, that is, to be parallel to the pair of front side frames 22.

  The front end portions of the pair of vertical bumper rain portions 23g are formed on vertical surfaces that are continuous forward with the vertical surfaces of the front end portions of the pair of frame front side portions 23b, respectively, and are formed on the front side of the pair of vertical bumper rain portions 23g and the frame front side. A pair of left and right contact surface portions 23i that are located at the front end of the bumper rain 23 and face forward are formed with the front end portion of the portion 23b. That is, the pair of contact surface portions 23i are provided so as to project inward in the vehicle width direction from the connecting portion 23a, and the front end portions of the pair of vertical bumper rain portions 23g are formed on the pair of contact surface portions 23i. Has been.

  The horizontal bumper rain portion 23h is formed so as to recede so as to be positioned rearward of the front end portion of the front side frame 22 and to extend straight in the vehicle width direction. The pair of vertical bumper rain portions 23g and the horizontal bumper rain portion 23h Thus, the vehicle width direction intermediate portion 23c is formed in a concave shape that opens forward in plan view. An intermediate cross member 25 is disposed a little rearward from the horizontal bumper rain portion 23h, and the vehicle width direction central portion of the horizontal bumper rain portion 23h is connected to the vehicle width direction central portion of the intermediate cross member 25 via an intermediate crash can 28. ing.

  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 from the pair of front apron members 30 and the bonnet 31 to form a front exterior surface of the vehicle 1, and includes a pair of frame front side portions 23 b, a vehicle width direction intermediate portion 23 c, A pair of bumper member frame front side portions 24b, a bumper member vehicle width direction intermediate portion 24c, and a pair of bumper member vehicle width direction outer side portions 24d respectively correspond to the pair of vehicle width direction outer side portions 23d.

  The pair of bumper member frame front side portions 24b and the pair of bumper member vehicle width direction outer side portions 24d are formed along the pair of frame front side portions 23b and the vehicle width direction outer side portion 23d. 24c is formed so as to extend substantially straight in the vehicle width direction as a whole, including the pair of bumper member frame front side portions 24b, like the conventional bumper rain.

  The shock absorbing member 26 is made of a shock absorbing member and is disposed between the lateral bumper rain portion 23 h and the bumper member 24. Specifically, the shock absorbing member 26 is made of a foamed resin such as urethane foam, is formed in a rectangular shape in plan view, and is in a recess (between a pair of vertical bumper rain portions 23g) in the vehicle width direction intermediate portion 23c. ) And is in close contact with the pair of vertical bumper rain portions 23g and the horizontal bumper rain portion 23h, and the front end edge portion thereof is substantially in the front-rear direction position with the contact surface portion 23i.

  The shock absorbing member 26 is fixedly attached to at least one of the pair of vertical bumper rain portions 23g and horizontal bumper rain portions 23h. Although not shown, when the impact absorbing member 26 is fixed to the lateral bumper rain portion 23h, a plurality of bolts are inserted into the impact absorbing member 26 from the front side and screwed into the lateral bumper rain portion 23h, and the impact absorbing member 26 is Fastened to the bumper rain portion 23h, in this case, the bolt head is positioned inside the shock absorbing member 26 so as not to hinder the shock absorbing function of the shock absorbing member 26. The shock absorbing member 26 may be provided so as to protrude forward from the concave portion of the vehicle width direction intermediate portion 23c so that the front end portion of the shock absorbing member 26 contacts the bumper member 24.

  In the engine room 4, most of the engine 5 is positioned 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 is arranged. 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.

  Although not shown, an air introduction port for introducing running air is formed in the bumper member 24 in order to cool at least the radiator of the cooling unit 47, and further, the running air is sent from the air introduction port to the cooling unit 47. An air duct for guiding 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.
Since the bumper rain 23 has a vehicle width direction intermediate portion 23c that is retracted from the connecting portion 23a between the connecting portions 23a to the pair of front side frames 22, there is a limit in retracting the position of the connecting portion 23a. However, the position of the center of gravity of the bumper rain 23, which is a heavy object, can be retracted to shorten the front overhang at the center portion in the vehicle width direction. Therefore, the yaw moment of inertia of the vehicle 1 can be reduced, and the steering stability of the vehicle 1 (handling) Performance), the dead space in the front-rear direction of the engine room 4 can be reduced, and the degree of freedom of design including the shape of the bumper member 24 forming the front exterior surface of the vehicle 1 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, this improvement can be further achieved by the vehicle width direction intermediate portion 23c of the bumper rain 23, and the rear placement of the engine 5 allows the conventional bumper rain in the engine room 4 to be dead in the front-rear direction. Although the space tends to increase, the above-described effect can be exhibited while reliably reducing the dead space.

  The bumper rain 23 has a lateral bumper rain portion 23h that is retracted so as to be located rearward of the front end portion of the front side frame 22 at the vehicle width direction intermediate portion 23c, and the weight of the lateral bumper rain portion 23h is the vehicle weight. Since it occupies about half the weight of the intermediate portion 23c in the width direction, the position of the center of gravity of the bumper rain 23 is further retracted to shorten the front overhang in the center portion in the vehicle width direction, to reduce the yaw moment of inertia of the vehicle 1, It is possible to further improve the steering stability and the degree of freedom in designing the bumper member 24.

  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 a pair of crash cans 27 capable of absorbing a collision load are attached to the front end portions of the pair of front side frames 22, and the bumper rain 23 is connected to the pair of crash cans 27, an intermediate retreating portion 23e of the bumper rain 23 is further provided. Since the intermediate cross member 25 and the intermediate cross member 25 are connected via the intermediate crush can 28 capable of absorbing the collision load, the impact absorption performance can be improved and the collision safety can be 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, the collision weight is often input from the frame front side portion 23b of the bumper rain 23. Therefore, the function of the crash can 27 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.

  Since it has 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, the vehicle width direction intermediate portion 23 c of the bumper rain 23 is connected to the intermediate cross member 25. The intermediate cross member 25 enhances the torsional rigidity of the vehicle 1 of the vehicle 1 and, at the time of a vehicle collision, the collision load input to the bumper rain 23 is transmitted from the front end side to the pair of front side frames 22 and the intermediate cross member 25 It is transmitted to the member 25 and transmitted from the intermediate cross member 25 to the middle part of the pair of front side frames 22 in the longitudinal direction. Therefore, the dispersibility of the collision load from the bumper rain 23 is increased, and the bumper rain 23 is intermediate in the vehicle width direction. The part 23c is prevented from being damaged due to improper bending, etc., and impact safety as well as collision safety The can be improved, it can also be effectively utilized an intermediate cross member 25 for connecting supporting various vehicle accessory.

  In the bumper rain 23, the pair of vertical bumper rain portions 23g extending in parallel with the pair of front side frames 22 has higher strength and rigidity (in the front-rear direction) than the collision object. There is a high possibility that an obstacle can be received and a collision load can be transmitted to the front side frame 22 and the intermediate cross member 25, and the vertical bumper rain portion 23g is not easily hit by an obstacle so that it is not easily damaged. As a result, it can be suppressed that the bumper rain 23 is greatly damaged and the repair cost of the bumper rain 23 is expensive, and the repairability of the bumper rain 23 due to a vehicle collision can be improved.

  Since the front end portions of the pair of vertical bumper rain portions 23g are formed on the pair of left and right contact surface portions 23i located at the front end of the bumper rain 23 and facing forward, an obstacle hits the contact surface portion 23i at the time of a vehicle collision. In this case, the obstacle can be reliably received through the vertical bumper rain portion 23g and the collision load can be reliably transmitted from the vertical bumper rain portion 23g to the intermediate cross member 25.

  Since the impact absorbing member 26 is disposed between the lateral bumper rain portion 23h and the bumper member 24, when an obstacle hits the impact absorbing member 26 at the time of a vehicle collision, the impact absorbing member 26 applies the impact from the obstacle. In this case, a pedestrian that is an obstacle can be actively drawn into the front side of the lateral bumper rain portion 23h from between the pair of connecting portions 23a. Further, the shock absorbing member 26 can be thickened in the front-rear direction without deteriorating the appearance, and the shock absorbing function (collision safety) can be enhanced. Repairability can be further improved.

  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 FIG. 6, in the vehicle front structure 20A of the first modification, in the vehicle width direction intermediate portion 23Ac of the bumper rain 23A, the pair of vertical bumper rain portions 23Ag are slightly inclined from the front-rear direction. Extending rearward from the front end and inward in the vehicle width direction, both ends of the horizontal bumper rain portion 23Ah in the vehicle width direction are connected to the rear end portions of the pair of vertical bumper rain portions 23Ag. A front end portion of the pair of vertical bumper rain portions 23Ag is formed at a pair of left and right contact surface portions 23Ai that are located at the front end of the bumper rain 23A and face forward.

  The shock absorbing member 26A is housed in a recess (between the pair of vertical bumper rain portions 23Ag) of the vehicle width direction intermediate portion 23Ac, and is in close contact with the pair of vertical bumper rain portions 23Ag and the horizontal bumper rain portion 23Ah, and the front end thereof The edge portion is configured to be substantially the same in the front-rear direction position as the contact surface portion 23Ai. The horizontal thickness of the front portion of the vertical bumper rain portion 23Ag is slightly thicker than the other portions.

2] As shown in FIG. 7, in the vehicle front structure 20B according to the second modified example, the shock absorbing member 26 and the entire bumper rain 23 and the bumper member 24 located on the front side of the bumper rain 23 are disposed. Two shock absorbing members 29 are provided, and the second shock absorbing member 29 is provided along a pair of bumper member frame front side portion 24b and a bumper member vehicle width direction middle portion 24c, and is arranged in the middle in the vehicle width direction. The portion is located on the front side of the shock absorbing member 26. The second shock absorbing member 29 is provided separately from the shock absorbing member 26, but may be provided integrally with the shock absorbing member 26.

3] As shown in FIG. 8, in the vehicle front structure 20C of the third modification, the lateral bumper rain portion 23h of the bumper rain 23 is intermediated via a plurality of intermediate crash cans 28C (a pair of left and right intermediate crash cans 28C). It is connected to the cross member 25. By positioning the intermediate cross member 25 substantially behind the vertical bumper rain portion 23g, the support rigidity of the vertical bumper rain portion 23g is reliably increased, and a collision load is applied from the vertical bumper rain portion 23g to the intermediate crash can 28A during a vehicle collision. While being able to transmit reliably to the intermediate | middle cross member 25, collision safety can be improved further with impact absorption performance.

4] As shown in FIG. 9, in the vehicle front structure 20 </ b> D according to the fourth modification, the bumper member 24 </ b> D has the bumper member vehicle width direction intermediate portion 24 </ b> Dc retracted along the vehicle width direction intermediate portion 23 c of the bumper rain 23. It is formed in the concave shape of the front opening, and thereby the design of the bumper member 24D can be improved. In addition, an impact absorbing member 26D is disposed between the entire bumper rain 23 and the bumper member 24D located at the front side thereof.

5] As shown in FIGS. 10 to 12, in the vehicle front structure 20E according to the modified example 5, the bumper member 24E includes a pair of bumper members in the vehicle width direction intermediate portion 24Ec as in the main embodiment. The bumper member frame front side portion 24b is formed so as to extend generally straight in the vehicle width direction, and the impact absorbing member 26 of the main embodiment is omitted.

  An air introduction port 24Eh for introducing traveling wind for generating downforce is formed in the bumper member vehicle width direction intermediate portion 24Ec, and a bumper grille 24Ei is attached to the air introduction port 24Eh. The air introduction port 24Eh is located on the front side between the pair of contact surface portions 23i of the bumper rain 23, and an air passage 51 connecting the air introduction port 24Eh and the air discharge port 50 formed on the front end side of the bonnet 31 is provided. The vehicle width direction intermediate portion 23c is provided so as to pass through the upper side from the front side. 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 front structure 20E of the vehicle, 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. Since the vehicle width direction intermediate portion 23c has the horizontal bumper rain portion 23h that is retracted so as to be located behind the front end portion of the front side frame 22, the air introduction port 24Eh is provided in the vehicle width direction as described above. The air passage 51 can be provided on the front side of the intermediate portion 23c so as to pass from the front side to the upper side of the vehicle width direction intermediate portion 23c. Therefore, the spoiler 52 is formed in a shape that can generate more downforce. Can be provided.

6] As modification 6, although not shown, the front side frame 22 and the vertical bumper rain portion 23g arranged in parallel may be connected by some connecting means.
7] As a seventh modification, the bumper rain 23 may be connected to the intermediate cross member 25 directly or via a connecting member other than the crush can.

8] The front structure of the vehicle may be configured by combining the configurations of the main embodiment and the configurations of Modifications 1 to 7 if possible.

9] Other than the above, the present invention can be implemented by adding various configurations other than the above-mentioned disclosure within the scope of the present invention, and the present invention is not limited to the vehicle disclosed in the embodiment, but an FF vehicle. It is applicable to various vehicles such as.

It is sectional drawing of the principal part flat 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 the front part structure of vehicles. It is a perspective view from the front diagonal upper side of the principal part of the front part structure of a vehicle. FIG. 9 is a plan sectional view of a main part of a front structure of a vehicle according to Modification 1; FIG. 10 is a plan sectional view of a main part of a front structure of a vehicle according to Modification 2; FIG. 10 is a plan sectional view of a main part of a front structure of a vehicle according to Modification 3; FIG. 10 is a plan sectional view of a main part of a front structure of a vehicle according to a fourth modification. FIG. 10 is a plan sectional view of a main part of a front structure of a vehicle according to Modification 5; FIG. 10 is a perspective view from the front diagonally upper side of a vehicle front structure according to Modification 5; FIG. 10 is a longitudinal sectional view of a main part of a front structure of a vehicle according to Modification 5;

Explanation of symbols

1 Vehicle 20, 20A, 20B, 20C, 20D, 20E Front structure 21 Dash panel 22 Front side frame 23, 23A Bumper rain (bumper reinforcement)
23a Connecting portion 23c, 23Ac Vehicle width direction intermediate portion 23d Vehicle width direction outer side portion 23f Outer receding portion 23g, 23Ag Vertical bumper rain portion 23h, 23Ah Horizontal bumper rain portion 23i, 23Ai Contact surface portion 24, 24D, 24F Bumper members 24c, 24Dc Bumper Intermediate part 25 in the vehicle width direction Intermediate cross member 26, 26A, 26D Impact absorbing member 27 Crash can 28, 28C Intermediate crash can

Claims (8)

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,
The bumper reinforcement is a pair of left and right vertical members extending in the vehicle width direction intermediate portion between the connecting portions with the pair of front side frames and extending rearward of the connecting portions in parallel with the pair of front side frames. 1. A front structure of a vehicle comprising: a bumper rain portion; and a lateral bumper rain portion extending in the vehicle width direction by connecting both ends in the vehicle width direction to rear ends of the pair of vertical bumper rain portions.   2. The front of the vehicle according to claim 1, wherein a front end portion of the pair of vertical bumper rain portions is formed at a pair of left and right abutting surface portions located at a front end of the bumper reinforcement and facing forward. Part structure.   3. The bumper reinforcement includes an outer receding portion that is receded so as to be positioned rearward of the connecting portion at an outer side in the vehicle width direction than the connecting portion. Vehicle front structure.   2. A pair of crash cans capable of absorbing a collision load is attached to front ends of the pair of front side frames, and a bumper reinforcement is connected to the pair of crash cans. 4. A front structure of a vehicle according to any one of 3 above. 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;
The vehicle front structure according to any one of claims 1 to 4, wherein the lateral bumper rain portion is connected to an intermediate cross member.   The vehicle front structure according to claim 5, wherein the lateral bumper rain portion and the intermediate cross member are connected via an intermediate crash can capable of absorbing a collision load.   The vehicle front structure according to claim 1, wherein an impact absorbing member is disposed between the lateral bumper rain portion and the bumper member.   The vehicle front structure according to any one of claims 1 to 7, wherein the bumper member has a bumper member intermediate portion in the vehicle width direction that is retracted along the intermediate portion in the vehicle width direction.