JP2005231436A - Front body structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a front body structure of a vehicle compatibly reducing damageability of a subject vehicle and reducing damage causative property to a counter vehicle in a head-on collision. <P>SOLUTION: A pair of front side frames 1 are protruded from a cabin of a vehicle V. An apron reinforcement 3 is protruded from a root of a front pillar P, and a connection member 5 is provided in front thereof. A front end of the connection member 5 is located on the outer side in the vehicle width direction with respect to the front side frames 1, and a bumper reinforcement 2 is supported by the front side frames 1 and the connection member 5. In a head-on collision, an impact is absorbed by the front side frames 1, the connection member 5 and the apron reinforcement 3, and the damageability of the vehicle V is reduced. The damage causative property to a counter vehicle is also reduced since the bumper reinforcement 2 applies the impact as a face to the counter vehicle. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a front body structure of an automobile.

  In order to absorb an impact at the time of a frontal collision of an automobile, a structure for absorbing the impact, that is, reducing damage, is required at the front portion of the vehicle body. Specifically, the front side frame that is provided so as to protrude continuously forward from the vehicle floor frame on both sides of the front part of the vehicle and supports the suspension device and mounts the engine is positively activated in the axial direction in the event of a collision. It is configured so as to buckle and suppress the collapse of the cabin portion behind the engine room.

  On the other hand, in recent years, it has been required to reduce the harmfulness of vehicles. That is, there is an increasing need to reduce the damage that the host vehicle causes to the opponent vehicle when the vehicles collide. In general, the reduction in harm can be obtained by lowering the rigidity of the front part of the vehicle (for example, the above-mentioned front side frame) when considering a front collision.

  However, if the rigidity of the front part of the vehicle is lowered to reduce the harmfulness, there arises a problem that the damage may be increased. In other words, in order to reduce the harm, it is necessary to lower the axial rigidity to some extent so that the front part of the vehicle is easily deformed at the time of a front collision, but if the rigidity becomes too low, the impact is applied only to the front part of the vehicle. It cannot be absorbed, and the cabin part is deformed. Especially in small cars where the length of the front part of the cabin is short, if you try to absorb the impact in front of the cabin as much as possible, the crushing length cannot be secured, so the rigidity of the front frame must be increased. It is more difficult to achieve both the reduction of damage and the reduction of harm.

  In order to cope with this point, it is conceivable to increase the number of members that absorb the impact on the front surface of the vehicle. Specifically, the apron reinforcement that extends forward from the base of the left and right front pillars of the vehicle and secures the rigidity of the upper part of the suspension tower and attaches the hood hinges is extended forward as an impact absorbing member. It is constructed so as to absorb the impact at the time of collision in cooperation with the frame. By doing so, it is possible to absorb the impact as a whole without reducing the rigidity of each of the front side frame and the apron reinforcement, that is, without increasing the harmfulness, that is, reducing the damage. It will be. Thus, the structure which absorbs the impact at the time of front collision by both the apron reinforcement and the front side frame is described in the following Patent Document 1.

JP 2003-40142 A

  However, in the configuration disclosed in Patent Document 1, the front side frame (referred to as a side member in the document) and the apron reinforcement (referred to as an upper member in the document) are separated at the front end of the vehicle. It has a configuration. Therefore, when a front collision occurs with another vehicle, each of the front side frame and the apron reinforcement will impact the opponent vehicle, so the front end of the front side frame and the front end of the apron reinforcement There is a possibility that an impact is locally transmitted to the opponent vehicle through a small area, and the deformation amount of the opponent vehicle is increased. That is, in order to further reduce the harmfulness, it is considered that a further device is required in addition to simply extending the apron reinforcement forward as in Patent Document 1.

  The present invention has been made in view of the above points, and the problem is that when the vehicle collides with another vehicle, the damage of the own vehicle and the harm of the opponent vehicle are reduced. There is to make it compatible at a higher level.

In order to solve the above problems, the present invention has the following configuration, that is, the first configuration of the present invention is as follows.
A pair of left and right front side frames continuously extending from the vehicle floor to the front of the vehicle compartment; and a pair of left and right apron reinforcements extending from the front pillar of the vehicle to the vehicle front of the vehicle continuously. And a front vehicle body structure of a vehicle in which a bumper member including a bumper reinforcement extending in the vehicle width direction is disposed at the front portion of each front side frame.
The front ends of the pair of left and right apron reinforcements are each provided with a connecting portion extending forward.
The front end portion of each of the connecting portions is disposed to be offset outward in the vehicle width direction with respect to the front end portion of each of the front side frames,
The bumper reinforcement is supported by a front end portion of each connecting portion and a front end portion of each front side frame.

  According to the above configuration, the front end portion of the front side frame and the front end portion of the connecting portion extending forward from the apron reinforcement are offset substantially in the vehicle width direction, and the bumper reinforcement is connected to the front end of the front side frame. And the front end of the connecting portion. Therefore, at the time of a frontal collision of the vehicle, since the impact is surely input to both the front side frame, the connecting portion and the apron reinforcement and the impact is absorbed by them, the impact is more surely forward in front of the passenger compartment. It is absorbed and the damage of the own vehicle can be reduced. Furthermore, when the vehicle collides with another vehicle, the collision load is applied via the bumper reinforcement supported by the front side frame and the apron reinforcement (and the connecting portion), that is, through a wider surface. Since it is applied to the opponent vehicle more uniformly, it is possible to reduce the damage of the opponent vehicle, that is, reduce the harmfulness. In addition to the effects described above, the connecting part is offset with respect to the front side frame in the vehicle width direction outside, so that the connecting part and the apron reinforcement are shock-absorbed particularly when the vehicle has an offset collision. The effect that it can function as a member is acquired. When the front side frame is provided with the bumper reinforcement via the crash can, the front end portion of the front side frame is the front end portion of the crash can. In addition, the connecting portion may be configured integrally with the apron reinforcement by extending the apron reinforcement forward, or may be configured as a separate part from the apron reinforcement. good.

The second configuration of the present invention is as follows:
A drooping portion that hangs down substantially in the vehicle vertical direction is provided at the front of each of the connecting portions,
The vertical length of the bumper reinforcement combined with the front surface of the hanging portion is larger on the front surface of the hanging portion than the vertical length of the bumper reinforcement in front view of the vehicle. The bumper reinforcement is attached.

According to the above configuration, when the vehicle collides with another vehicle, the vehicle collides with the opponent vehicle not only through the bumper reinforcement but also through the hanging portion. It is transmitted over a wide area. Therefore, it is possible to further reduce the harm when the vehicle collides with another vehicle. Regarding the positional relationship between the bumper reinforcement and the hanging part, the vertical length of the bumper reinforcement and the front of the hanging part is larger than the vertical length of the bumper reinforcement. The reinforcement and the front of the hanging part may be partially wrapped in the vertical direction, or if the vertical length of the front of the hanging part is larger than that of the bumper reinforcement, the bumper reinforcement The vertical length portion may be included in the vertical length portion of the front surface of the hanging portion.

The third configuration of the present invention is:
Each said connection part is attached with respect to each said apron reinforcement so that attachment or detachment is possible.

  When the connecting member and the apron reinforcement function as the impact absorbing member, it is considered that the frequency of damage to the connecting portion increases in the case of an offset collision or a light collision. However, the repairability of the connecting portion can be improved by attaching the connecting portion to the apron reinforcement as described above.

The fourth configuration of the present invention is as follows.
The vehicle has a shroud extending in the vehicle width direction of the vehicle and having both ends in the vehicle width direction connected to the apron reinforcements, respectively, and holding parts of the vehicle,
Each said connection part is attached to each said apron reinforcement ahead of the connection part of the said apron reinforcement and the said shroud.

  The connecting portion provided to achieve both reduction in vehicle damage and reduction in damage increases the frequency of damage during light collisions. As described above, in a vehicle where the shroud is connected to the apron reinforcement, the connecting portion is damaged by attaching the connecting portion to the apron reinforcement ahead of the connecting portion between the shroud and the apron reinforcement. However, damage to the shroud due to the damage can be prevented.

The fifth configuration of the present invention is:
Each said connection part is comprised from the steel plate whose intensity | strength of the vehicle front-back direction is smaller than each said apron reinforcement.

  When a vehicle component is attached to or supported by the apron reinforcement, the deformation of the apron reinforcement during a light vehicle collision is displaced by the deformation of the component that is supported by or attached to the apron reinforcement. There is a risk of causing. However, according to the above configuration, since the connecting portion is made of a steel plate whose strength in the longitudinal direction of the vehicle is smaller than that of the apron reinforcement, the connecting portion is deformed before the apron reinforcement when the vehicle collides lightly. In addition, the deformation of the apron reinforcement, and hence the deformation or displacement of the parts supported or attached to the apron reinforcement can be suppressed.

The sixth configuration of the present invention is as follows.
Each said connection part is comprised in the shape which inclined forward and downward from each said apron reinforcement.

  When a vehicle component is attached to or supported by the apron reinforcement, the deformation of the apron reinforcement during a light vehicle collision is displaced by the deformation of the component that is supported by or attached to the apron reinforcement. There is a risk of causing. However, according to the above configuration, since the connecting portion is configured to be inclined forward and downward from the apron reinforcement, the connecting portion is deformed prior to the apron reinforcement when the vehicle collides lightly. The deformation of the apron reinforcement, and hence the deformation or displacement of the parts supported or attached to the apron reinforcement can be suppressed.

The seventh configuration of the present invention is:
Each said connection part is attached to the said bumper reinforcement so that attachment or detachment is possible.

  According to the above configuration, the bumper reinforcement can be removed from the connecting portion after a light collision that only damages the bumper reinforcement, so the connecting portion is also replaced when the bumper reinforcement is damaged. There is no need to improve the repairability of bumper reinforcement.

The eighth configuration of the present invention is:
Each said connection part is comprised more highly rigid than the said bumper reinforcement.

  According to said structure, when a vehicle collides lightly, damage can be stopped by bumper reinforcement and it can suppress that damage reaches a connection part.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle body structure of the motor vehicle which balances the reduction of the damage property of the own vehicle at the time of a front-end collision with the other vehicle and the reduction of the harm property of the other vehicle at a higher level is provided. I can do it.

  An embodiment of the present invention will be described with reference to FIGS. First, the configuration of a vehicle body B of a vehicle V to which the present invention is applied will be described with reference to FIGS. 1 to 3. 1 is a perspective view showing a front portion of a vehicle body B to which the present invention is applied, FIG. 2 is a side view showing the front portion of the vehicle body B to which the present invention is applied, and FIG. 3 is a vehicle body B to which the present invention is applied. It is a top view which shows the front part.

  The front side frame 1 has a closed cross section, and a pair of left and right ones are separated from each other in the vehicle width direction of the vehicle V so as to extend forward from a rear floor (not shown). An engine is mounted on the upper surface of the front side frame 1 via an engine mount, and a suspension device for front wheels and front wheels is attached to the lower surface of the front side frame 1 via a suspension cross member. In addition to these, various auxiliary machines and components are attached to the front side frame 1, but their illustration is omitted. Further, the front side frame 1 is positively buckled so that the rear passenger compartment is not deformed when the vehicle V collides forward, and is transmitted from the bumper reinforcement 2 described later via the crash can 7. It is configured to absorb the impact. Such a structure can be realized by a known method such as forming a bead on the front side frame 1.

  The apron reinforcement 3 is provided to extend forward from the base portions of the left and right front pillars P of the vehicle V. The apron reinforcement 3 is provided with a hood hinge that supports the hood hood so as to be freely opened and closed, and supports the suspension tower 4 formed corresponding to both the left and right wheels of the vehicle. Further, a fender panel is attached to the apron reinforcement 3 on the outer side in the vehicle width direction. The hood hood, hood hinge, fender panel, and wheels are not shown. Further, the apron reinforcement 3 is detachably attached with a connecting member 5 having a closed cross section at the front end thereof, and a bumper rain, which will be described later, when the vehicle V projects forward, like the front side frame 1. The impact load transmitted from the force 2 is absorbed together with the connecting member 5. Instead of providing the connecting member 5 as a separate part, the apron reinforcement 3 may be configured to extend forward, but providing it as a separate part is advantageous in terms of repairability after a collision. This point will be specifically described later.

  A bumper reinforcement 2 is attached to the front side frame 1 via a crash can 7. The front end of the connecting member 5 is also attached to the bumper reinforcement 2. That is, the bumper reinforcement 2 extends in the vehicle width direction and is supported by the front end portion of the crash can 7 in front of the bumper reinforcement 2 and the front end portion of the connecting member 5. The bumper reinforcement 2 is formed by roll-forming a steel plate, and normally constitutes an assembly together with a bumper face provided on the outside thereof and is attached to the vehicle body B as an assembly. Only reinforcement 2 is illustrated. A shroud 6 to which a lock mechanism for a lamp and a hood hood (both not shown) is attached extends in the vehicle width direction, and is attached to the apron reinforcement 3 at both ends thereof.

  As shown suitably in FIG. 2, the pair of left and right connecting members 5 are positioned on the outer side in the vehicle width direction with respect to the pair of left and right front side frames 1, respectively. The bumper reinforcement 2 is supported while being separated in the vehicle width direction. Further, the attachment portion 60 of the shroud 6 to the apron reinforcement 3 is positioned behind the connection portion 50 to which the connecting member 5 is attached at the front end of the apron reinforcement 3.

  Further, as suitably shown in FIG. 3, the connecting member 5 is formed by press-forming a steel plate having a strength lower than that of the apron reinforcement 3, and forwards from the front end of the apron reinforcement 3 toward the front. It is attached so that it falls. Further, the rigidity in the vehicle front-rear direction is configured to be larger than that of the bumper reinforcement 2 and smaller than that of the apron reinforcement 3 by adjusting the material and shape of the connecting member 5. The reason will be specifically described later. FIG. 3 illustrates a state in which the right side is viewed from the inside of the engine room of the vehicle V with respect to the front side of the vehicle, but the left side is substantially symmetrical with the right side.

  The connecting member 5 is detachably attached to the apron reinforcement 3 and the bumper reinforcement 2. Hereinafter, the connection between the connecting member 5 and the apron reinforcement 3 and between the connecting member 5 and the bumper reinforcement 2 will be described with reference to FIGS. 4 and 5.

  FIG. 4 is an enlarged top view of the connecting portion 50 between the connecting member 5 and the apron reinforcement 3 on the right side in the vehicle traveling direction. On the rear end of the connecting member 5, that is, on the apron reinforcement 3 side, a pinching portion 51 that sandwiches the apron reinforcement 3 from the left and right is formed. Further, a bolt hole is formed in the clamping portion 51 so that the bolt 52 can pass therethrough. On the other hand, the apron reinforcement 3 is also formed with bolt holes corresponding to the bolt holes provided in the clamping portion 51. Therefore, after the positions of the bolt holes are adjusted in a state where the apron reinforcement 3 is held in the holding part 51 of the connecting member 5, the bolt 52 is inserted into each bolt hole, and the connecting member 5 Fasten the apron reinforcement 3 together. Incidentally, when the connecting member 5 and the apron reinforcement 3 are fastened together with a pair of bolts 52 and nuts 53, the connecting member 5 and the apron reinforcement 3 are respectively provided with corresponding projections so as not to be displaced. It is preferable to perform positioning by providing a portion and a recess. In this manner, the connecting member 5 and the apron reinforcement 3 are fixed by the bolts 52 and the nuts 53, so that the connecting member 5 is detachably attached to the apron reinforcement 3. 4 shows the right side with respect to the front of the vehicle, the right side is substantially symmetric with the left side.

  FIG. 5 is a longitudinal sectional view of the connecting member 5 and the bumper reinforcement 2 along the longitudinal direction of the connecting member 5, schematically showing a connecting portion between the connecting member 5 and the bumper reinforcement 2. A bracket 54 to which a bolt 55 is attached in advance is fixed to the front end of the connecting member 5. A bracket 20 provided with a bolt hole 21 is attached to a corresponding portion of the bumper reinforcement 2. Further, for the operation of screwing the nut 56 into the bolt 55 provided at the front end of the connecting member 5 at the position corresponding to the bolt hole on the front surface of the bumper reinforcement 2 (and the bumper face not shown). A service hole 22 is formed. Therefore, after the bolt 55 at the front end of the connecting member 5 is inserted into the bolt hole 21 of the bumper reinforcement 2, the nut 56 is screwed into the bolt 55 inside the bumper reinforcement 2 using a tool through the service hole 22. By performing the work, the connecting member 5 is detachably attached to the bumper reinforcement 2. Such a configuration is the same at the left and right attachment locations.

  The bumper reinforcement 2 is detachably attached to the front side frame 1 via the crash can 7, but since this configuration is well known, detailed description thereof is omitted.

  The effects of the above configuration will be described below with reference to FIGS.

  FIG. 6 is a side view schematically showing a load flow at the time of front collision in the front vehicle body structure according to the present invention. As illustrated and as described above, the bumper reinforcement 2 is supported by the front side frame 1 and the apron reinforcement 3 via the connecting member 5. Accordingly, the collision load applied to the bumper reinforcement 2 from the front is transmitted through the front side frame 1 through the transmission path A, the transmission path B from the connecting member 5 through the apron reinforcement 3, and the front wheel W. Since it is distributed and transmitted to the transmission path C that reaches the side sills 8 provided on both sides of the floor in the vehicle width direction, the deformation of the host vehicle can be suppressed without concentration of the load. That is, the damage is low. The graph of FIG. 7 is a graph in which the amount of crushing of the vehicle body at the time of a front collision of the vehicle body B is taken as the horizontal axis, and the impact load absorbed is taken as the vertical axis. In this graph, the broken line is based on the conventional vehicle body structure, and the solid line is based on the vehicle body structure to which the present invention is applied. Since the vehicle body structure of the present invention can absorb more collision load than the conventional structure, absorption of the collision energy represented by the area surrounded by the plot of the graph and the horizontal axis (shown by hatching in FIG. 7). When the amount is the same, the vehicle body structure according to the present invention requires less vehicle body collapse.

  Further, since the front end of the front side frame 1 and the connecting member 5 (including the crash can 7) is fixed to the bumper reinforcement 2, the bumper reinforcement 2 is supported only by the front side frame 1. Compared to the case, it acts as a surface having a more uniform rigidity, and when it collides with another vehicle, an impact is applied to the opponent vehicle via such a surface. That is, the harmfulness is low. In particular, when the bumper reinforcement 2 of the host vehicle is located at a position higher than the height of the side sill of the partner vehicle, such as when colliding with the side surface of the partner vehicle, the deformation of the partner vehicle becomes large. However, according to the present invention, even in such a case, since the impact is applied to the opponent vehicle through a wide surface, the harm is reduced. In this embodiment, as shown in FIG. 2, the front end of the connecting member 5 and the front end of the crash can 7 support the bumper reinforcement 2 at substantially the same position in the vehicle front-rear direction. And the front end of the crash can 7 may be offset in the vehicle front-rear direction. If at least the front end of the connecting member 5 and the front end of the crash can 7 are configured to support the load applied to the bumper reinforcement 2 from the front, it is possible to reduce the harmfulness.

  The front vehicle body structure according to the present invention is also effective against offset collision. That is, when considering a collision mode as shown in FIG. 8 in which the offset amount is large and the impact of the opponent vehicle Vc is applied to a position offset further outward in the vehicle width direction than the front side frame 1 of the host vehicle Vo. In the present invention, only the load transmission path from the bumper reinforcement 2 to the wheel W and the side sill 8 and the load transmission path from the bumper reinforcement 2 to the front side frame 1 are the bumper rain according to the present invention. This is because the load applied to the reinforcement 2 is further distributed to a new load transmission path from the bumper reinforcement 2 to the connecting member 5 and the apron reinforcement 3. In FIG. 8, only this new transmission path is indicated by an arrow.

  Now, when the connecting member 5 is provided at the front end portion of the apron reinforcement 3 to function as an impact absorbing member, the frequency of the connecting member 5 being deformed, that is, damaged in the case of a frontal collision, particularly during an offset collision or a light collision. It is thought that it becomes high, and a new problem of repairability arises.

  In this regard, in the present invention, as described above, since the connecting member 5 is detachably attached to the apron reinforcement 3 and the bumper reinforcement 2, only the connecting member 5 is deformed. The connection member 5 can be replaced. In other words, when the apron reinforcement 3 is extended as it is, the apron reinforcement 3 needs to be replaced as a whole. However, by making the connecting member 5 replaceable, only the connecting member 5 is damaged. This makes it possible to improve the repairability in such a collision mode.

  Further, as described above, the rigidity of the connecting member 5 (specifically, the bending rigidity in the vehicle longitudinal direction) is higher than that of the bumper reinforcement 2 and smaller than that of the apron reinforcement 3. Therefore, in the case of a light collision in which the shock can be absorbed only by the bumper reinforcement 2, only the bumper reinforcement 2 needs to be replaced. In addition, if the collision causes damage to the connecting member 5, the connecting member 5 is bent and deformed before the apron reinforcement 3, so that the deformation to the apron reinforcement 3 is reliably prevented. The Since the suspension tower 4 and the hood hinge are attached to the apron reinforcement 3 as described above, the deformation of the apron reinforcement 3 may lead to the deformation and displacement of those parts. Such a problem is surely prevented. In particular, the deformation of the suspension tower 4 may adversely affect the maneuverability of the vehicle. However, the suspension tower 4 is prevented from being deformed due to the deformation of the apron reinforcement 3 at the time of a light collision. Maneuverability when the vehicle V is allowed to self-run can be ensured.

  Furthermore, since the shroud 6 attached to the front portion of the vehicle V is attached to the apron reinforcement 3 behind the connecting portion between the connecting member 5 and the apron reinforcement 3, it is connected at the time of a light collision. When an impact that causes deformation of the member 5 is applied, the deformation to the shroud 6 is reliably prevented.

  By further devising the shape of the connecting member 5, it is possible to further reduce the harmfulness at the time of collision between vehicles. Such an example will be described below as a second embodiment of the present invention with reference to FIG. 9 corresponding to FIG. A description of the same configuration as that of the first embodiment will be omitted, and a description will be given focusing on the shape of the connecting member 5 and its operational effects as different portions.

  The connecting member 5 according to the second embodiment is provided with a hanging portion 59 that hangs in a substantially vertical direction at the front end thereof, and a bumper reinforcement 2 is bolted on the front surface of the hanging portion 59 as in the first embodiment. And it is detachably attached using a nut. The positional relationship between the front surface of the drooping portion 59 and the bumper reinforcement 2 is such that the front surface of the drooping portion 59 and the bumper reinforcement 2 partially wrap in the vertical direction. The length in the vertical direction that combines the bumper reinforcement 2 and the front surface of the hanging portion 59 is larger than the length in the vertical direction alone.

  The attachment of the connecting member 5 to the apron reinforcement 3 is also performed in a removable manner using bolts and nuts, as in the first embodiment.

  Therefore, when the vehicle V collides forward with another vehicle, after the bumper reinforcement 2 is deformed, the drooping portion 59 of the connecting member 5 applies an impact to the opponent vehicle. Since the vertical length of the hanging part 59 and the bumper reinforcement 2 is larger than that of the bumper reinforcement 2 alone, compared to the case where an impact is applied to the opponent vehicle via the bumper reinforcement 2, An impact is applied to the opponent vehicle in a wider area at least in the initial stage of the collision, and the deformation amount of the opponent vehicle can be suppressed. That is, the harmfulness is further reduced. Although FIG. 9 shows only one side of the vehicle V, a symmetrical configuration is also provided on the opposite side.

  When the vertical length of the front surface of the hanging portion 59 is larger than the vertical length of the bumper reinforcement 2, the vertical length portion of the bumper reinforcement 2 becomes the vertical length portion of the hanging portion 59. The bumper reinforcement 2 may be attached to the front surface of the hanging portion 59 so as to be accommodated.

  Although the present invention has been described with reference to the preferred embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention. . For example, as a method for making the rigidity of the connecting member smaller than that of the apron reinforcement, a steel plate having a strength lower than that of the apron reinforcement is used in the above-described embodiment, but the thickness is thinner than that of the apron reinforcement. A steel plate can also be used and / or a method of reducing the cross-sectional area can be used.

It is a perspective view which shows the front part of the vehicle body of the vehicle to which this invention was applied.

It is a side view which shows the front part of the vehicle body of the vehicle to which this invention was applied.

It is a top view which shows the front part of the vehicle body of the vehicle to which this invention was applied.

It is an enlarged top view of the connection part of a connection member and an apron reinforcement.

It is a longitudinal direction sectional view of a connection member and a bumper reinforcement along the longitudinal direction of a connection member which shows typically a connection part of a connection member and bumper reinforcement.

It is a side view which shows typically the flow of the load at the time of the front collision in the front part vehicle body structure by this invention.

It is a graph with the amount of crushing of the vehicle body on the horizontal axis and the impact load absorbed at the time of the vertical axis during a frontal collision of the vehicle body.

It is an upper surface schematic diagram which shows the state which the vehicle to which this invention was applied collided with offset.

It is a figure equivalent to FIG. 2 which shows 2nd Embodiment of this invention.

Explanation of symbols

1 Front Side Frame 2 Bumper Reinforcement 3 Apron Reinforcement 4 Suspension Tower 5 Connecting Member (Connecting Part)
6 Shroud
50 Connection between connecting member and apron reinforcement
59 Suspension
60 Connection B of shroud and apron reinforcement B
V vehicle

Claims (8)

A pair of left and right front side frames continuously extending from the vehicle floor to the front of the vehicle compartment; and a pair of left and right apron reinforcements extending from the front pillar of the vehicle to the vehicle front of the vehicle continuously. And a front vehicle body structure of a vehicle in which a bumper member including a bumper reinforcement extending in the vehicle width direction is disposed at the front portion of each front side frame.
The front ends of the pair of left and right apron reinforcements are provided with connecting portions extending forward, respectively.
The front end portion of each of the connecting portions is disposed to be offset outward in the vehicle width direction with respect to the front end portion of each of the front side frames,
A front body structure of an automobile, wherein the bumper reinforcement is supported by a front end portion of each of the connecting portions and a front end portion of each of the front side frames. A drooping portion that hangs down substantially in the vehicle vertical direction is provided at the front of each of the connecting portions,
The vertical length of the bumper reinforcement combined with the front surface of the hanging portion is larger on the front surface of the hanging portion than the vertical length of the bumper reinforcement in front view of the vehicle. The vehicle front body structure according to claim 1, wherein the bumper reinforcement is attached. The front body structure of an automobile according to claim 1, wherein each of the connecting portions is detachably attached to each of the apron reinforcements. The vehicle has a shroud extending in the vehicle width direction of the vehicle and having both ends in the vehicle width direction connected to the apron reinforcements and holding the vehicle components,
The front part of an automobile according to claim 3, wherein each of the connecting portions is attached to each of the apron reinforcements in front of a connection portion between the apron reinforcement and the shroud. Body structure. 5. The front body structure of a vehicle according to claim 3, wherein each of the connecting portions is made of a steel plate having a lower strength in the vehicle front-rear direction than each of the apron reinforcements. . 5. The front body structure of an automobile according to claim 3, wherein each of the connecting portions is formed in a shape inclined forward and downward from each of the apron reinforcements. The front body structure of an automobile according to any one of claims 1 to 6, wherein each of the connecting portions is detachably attached to the bumper reinforcement. The front body structure of an automobile according to claim 7, wherein each of the connecting portions is configured to be higher in rigidity than the bumper reinforcement.

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