JP4905678B2 - Body structure at the front of the vehicle - Google Patents

Description

  The present invention relates to a vehicle body structure of a vehicle front portion provided with a radiator support at the vehicle front portion.

  When it is assumed that a pedestrian collides with a traveling vehicle, the pedestrian's head or the like may collide with the hood or the like at the front of the vehicle body. For this reason, there is a demand for a protective structure capable of accurately mitigating impacts particularly at a site where the head may collide. For example, there is a demand for a structure capable of absorbing an impact without a high-rigidity skeleton member being present at a predetermined distance (for example, a 1-m portion) along a bumper or hood from the road surface.

  On the other hand, conventionally, the front part of the vehicle (for example, when the front part of the vehicle has an engine room, the front part of the engine room) is provided with a radiator for cooling the engine, a condenser of an air conditioner, etc. (hereinafter collectively referred to as a radiator). ing. And the radiator support for mounting | wearing apparatuses, such as a radiator, is provided in the vehicle front part (for example, refer patent document 1). The radiator support is generally extended in the vertical direction of the vehicle in a pair of left and right, and the upper end is joined to the upper bar that supports the front portion of the hood, and is supported by the side member on the lower side. And it is comprised so that the weight of apparatuses, such as a radiator, may be supported by an upper bar and a side member, and it fixes reliably.

  In the case of a vehicle having such a configuration, depending on the type of vehicle, the position of the upper bar may be located at a predetermined distance from the road surface along the bumper or hood (for example, a 1-m portion). There is a possibility that the obstacle value given to will become high. In order to alleviate the impact on the pedestrian, a structure in which the attachment location of the radiator does not affect the deformation at the time of collision with the pedestrian has been proposed (for example, see Patent Document 2). In other words, the upper and lower sides of the radiator are supported on the vehicle structure by an elastic body, and the radiator support is broken by the input of a load exceeding a predetermined value, so that the amount of deformation of the hood is crushed without increasing the gap between the hood and the radiator. It has been proposed to ensure.

JP 2005-119537 A JP 2004-98814 A

  However, in the case of a conventional vehicle front body structure as disclosed in Patent Document 2, both ends of rod-like members (corresponding to upper bars) that support devices such as radiators by the input of loads, so-called carrier structures It has a structure in which the attachment portion to (equivalent to the radiator support) is broken. For this reason, a device such as a radiator is not supported by the carrier structure. Therefore, there is a possibility that a device such as a radiator may fall off or fall down and interfere with other members to be damaged.

  In addition, in order to avoid adverse effects on pedestrians in the event of a collision, if the radiator is placed at a position far from the position of the front of the vehicle where the pedestrian is expected to collide, In addition to being restricted, there is a possibility that the cooling performance of the radiator may be adversely affected.

  The present invention has been made in view of the above situation, and in a vehicle in which a radiator is disposed in the front part of the vehicle, a radiator support that can accurately mitigate an impact from the upper portion of the hood while securely holding a device such as a radiator. An object of the present invention is to provide a vehicle body structure at the front of the vehicle.

Body structure of a vehicle front portion of the present invention according to claim 1 for achieving the above object, an upper bar that supports a front portion of the full over de disposed front edge of the cabin front region of the vehicle, the radiator A radiator support that extends in the vehicle vertical direction while supporting the side portion of the vehicle, and an upper end that is connected to the upper bar, and an extension formed above an upper frame that extends to the left and right front of the passenger compartment. The radiator support is a plate-like long member extending in the vehicle vertical direction, and is disposed so that the plate width direction faces the vehicle width direction. The upper end portion is bent in a bending portion and extends in the vehicle front-rear direction so as to be connected to the upper bar, and is more outward in the vehicle width direction than the connection portion between the upper bar and the radiator support and behind the vehicle. The extension is in front It is joined to an end portion which is curved toward the rear of the vehicle of the upper bar, the said curved portion and said extended portion is deformed with the upper bar a predetermined or more load from above is inputted downward displacement of the upper end It is configured to allow.

In the present invention according to claim 1, the radiator support is disposed in a state (orientation) that is relatively easily deformed with respect to the input from the oblique upper part of the hood, and the radiator support is bent at the bending portion and connected to the upper bar. Since the curved part is deformed so that the upper end is displaced downward when a predetermined load is input to the bar from above, the rigidity is excessive with respect to the load input to the upper bar from the oblique upper part of the hood. Therefore, the load can be absorbed efficiently and the shock can be absorbed accurately by the deformation of the radiator support. For this reason, the impact to a pedestrian can be relieved also at the time of a collision with a pedestrian. In addition, the radiator support absorbs the impact caused by the collision due to the deformation of the upper curved portion thereof, so that the support state of the radiator and the like is not affected, and the radiator and the like are reliably maintained. Therefore, it is possible to prevent a device such as a radiator from being dropped and damaged.
In addition, since the extension portion is formed and the end portion of the upper bar is joined to the extension portion, the load input to the upper bar can be received and absorbed not only by the radiator support but also by the extension portion. it can. Therefore, since the impact inputted from the upper part of the hood can be accurately absorbed, the impact on the pedestrian can be further alleviated.

  And the vehicle body structure of the vehicle front part of the present invention according to claim 2 is the vehicle body structure of the vehicle front part according to claim 1, wherein the curved portion of the radiator support has a step recessed inside the curved portion. A portion is formed.

  In the present invention according to claim 2, by changing the size and number of the step portions formed in the bending portion, the setting load for deforming the bending portion can be easily adjusted, and input to the upper end portion of the radiator support. Can be absorbed accurately.

  According to a third aspect of the present invention, there is provided a vehicle body structure for a vehicle front portion according to the present invention. The vehicle body structure for a vehicle front portion according to the first aspect is characterized in that a hole is formed in the curved portion of the radiator support. And

  In the present invention according to claim 3, by changing the size and number of the holes formed in the bending portion, it is possible to easily adjust the setting load for deforming the bending portion, which is input to the upper end portion of the radiator support. Can be absorbed accurately.

According to a fourth aspect of the present invention, there is provided a vehicle body structure for a front portion of a vehicle according to the first aspect of the present invention, wherein the radiator support is a substantially It is formed in a letter shape or a substantially hat shape.

In the present invention according to claim 4 , by making the cross section of the radiator support substantially U-shaped or substantially hat-shaped, it is possible to secure the strength to support a device such as a radiator with a lightweight and simple structure. And since it is set as the shape open | released behind a vehicle, a surface part turns to the vehicle front side, attachment of the apparatus from the vehicle front side becomes easy, and workability | operativity can be improved.

  The vehicle body structure of the front portion of the vehicle of the present invention includes a radiator support that can accurately mitigate the impact from the upper portion of the hood in a vehicle in which the radiator is disposed in the front portion of the vehicle while securely holding a device such as a radiator. It can be a structure.

  FIG. 1 is a perspective view showing a vehicle body structure of a vehicle front portion according to an embodiment of the present invention, FIG. 2 is an exploded view of the vehicle front portion (FIG. 1), and FIG. 3 is a vehicle front portion (FIG. 1). 4 is a sectional view taken along the line AA in FIG. 3, FIG. 5 is a detail of the radiator support bending portion (periphery), and FIG. 6 is a sectional view taken along the line BB in FIG. FIG. 7 is a perspective view showing the attachment state of the radiator, and FIG. 8 shows the relationship between the pedestrian and the vehicle body.

  As shown in FIGS. 1 and 2, a pair of front pillars 3 extending in the vertical direction of the vehicle are provided on the left and right sides of the front portion of the vehicle compartment S of the vehicle. The base ends of a pair of left and right upper frames 6 extending forward are joined. The left and right front pillars 3 are connected to each other by a cowl top panel 9 extending in the vehicle width direction, and below the cowl top panel 9 is a dash panel that partitions the vehicle compartment S and a region in front of the vehicle compartment (food room). 10 is arranged. Cylindrical strut houses 16 that support the suspension device are provided on the left and right front sides of the dash panel 10 and are joined to the upper frame 6.

  In addition, a pair of left and right front floor side members (side members) 1 extending in the vehicle front-rear direction are disposed at positions on the inner side in the vehicle width direction from the front pillar 3 and below the upper frame 6, and the side members 1 extends from the lower side of the passenger compartment S along the dash panel 10 to the front of the vehicle. A front end portion of the upper frame 6 is connected to a front end portion of the side member 1 via a connection brace 7, and the front end portions of the side members 1 are connected to each other by a front end cross member 2.

  The area in front of the vehicle compartment (hood room) referred to here is an area of the front part of the vehicle covered with a plate-shaped hood. In the case of a vehicle in which the engine is placed in the front part, the engine room is generally used. Refers to the part called.

  As shown in FIGS. 1 and 2, the front pillar 3 has an upper side inclined obliquely rearward of the vehicle and connected to a roof pillar (not shown), and a lower side is arranged in parallel with the side member 1 at the lower end and connected to a side sill 4. Yes. As shown in FIG. 3, a joint projecting portion 5 projecting toward the vehicle front side is integrally provided at a substantially central portion of the front pillar 3, and a base end of the upper frame 6 is overlapped with the joint projecting portion 5. Being joined.

  As shown in FIG. 4, the upper frame 6 is composed of an upper frame outer 6 a having a substantially hat-shaped longitudinal cross section and an upper frame inner 6 b that is joined to the upper frame outer 6 a to form a closed cross section. It is a member, and the front end portion thereof is connected to the front end portion of the side member 1 via a connection brace 7.

  As shown in FIGS. 1, 3, and 4, the upper frame 6 is provided with an extending portion 11 formed by extending the upper frame inner 6b upward of the vehicle. An end of an upper bar 12 that supports the front portion of the hood is joined to the extended portion 11, and the upper bar 12 is supported by the extended portion 11. When the upper bar 12 has an excessive load that exceeds a predetermined value from above the hood (for example, excessive input from the hood due to a pedestrian collision or the like), the extended portion 11 is deformed to cause an impact (load). It is configured to absorb effectively.

  The connecting brace 7 is a connecting member that connects the front end portion of the upper frame 6 and the front end portion of the side member 1. As shown in FIG. 1, one end of the connecting brace 7 is joined to the front end surface of the upper frame 6. The end is joined to the front end surface of the side member 1 located in front of the vehicle with respect to the front end surface of the upper frame 6.

  The front end cross member 2 is coupled to the front surface of the end (other end) of the connecting brace 7 on the side member 1 side. The front end cross member 2 is connected to a connecting brace 7 joined to the front end surface of the side member 1 by bolts 15 (see FIG. 1), connects the connecting braces 7 arranged on the left and right sides, and a pair of left and right sides. The front end portions of the member 1 are connected to each other. The front end cross member 2 is also used as a bumper reinforcement / attachment tool.

  As shown in FIGS. 1 and 2, an upper bar 12 is provided in a front portion of the food room (an area in front of the passenger compartment). The upper bar 12 is a structural member that is arranged in the vehicle width direction and supports the front portion of the hood, and is provided with a hood lock member, a rubber member that suppresses metal buffering with the hood, and the like.

  As shown in FIGS. 1 to 3, a radiator support 13 is provided below the upper bar 12. The radiator support 13 is a member that supports a radiator or the like at the front portion of the vehicle, and is configured to hold a device such as a lamp. A pair of left and right radiator supports 13 extend in the vertical direction of the vehicle. An upper end portion 13a (see FIG. 5) is coupled to the lower surface of the upper bar 12, and a lower end portion is coupled to the connecting brace 7.

  A so-called radiator support 13 is provided across the upper bar 12 and the connecting brace 7 at the front portion of the food room, and supports the upper bar 12 together with the extending portion 11 of the upper frame 6. The radiator support 13 has a shape in which the lower side expands outward in the vehicle width direction with respect to the upper side, and the pair of radiator supports 13 has a substantially C shape when viewed from the front of the vehicle. The pair of left and right radiator supports 13 are connected to each other by a cross member 14 extending in the vehicle width direction in the vicinity of a substantially central portion in the vertical direction, and the rigidity thereof is ensured.

  As shown in FIG. 5, the radiator support 13 has a bending portion 41 that bends the upper end portion 13 a side at a portion near the upper upper bar 12. That is, the radiator support 13 is bent by the bending portion 41 so as to extend toward the vehicle rear side, and the upper end portion 13 a is connected to the lower surface of the upper bar 12.

  And the bending part 41 is comprised so that it may deform | transform when the load more than predetermined (for example, excessive input from the hood by a pedestrian's collision etc.) acts, and the upper end part 13a will be displaced below. That is, the radiator support 13 displaces the upper bar 12 to a lower position while deforming the curved portion 41 to absorb an impact (load) when a load exceeding a predetermined value is input to the upper bar 12 (upper end portion 13a) from above. It is configured to let you.

  The bending portion 41 is formed with a stepped portion 42 that is recessed inside the bending portion 41, and the bending portion 41 is configured in a stepped shape by the stepped portion 42. Then, by changing the size and number (the number of steps) of the step portions 42 formed on the bending portion 41, the strength of the bending portion 41 is adjusted (eg, weaker than other portions), and the bending portion is deformed. Load (predetermined load) is set.

  Note that the load (predetermined load) at which the curved portion 41 of the radiator support 13 is deformed and the impact begins to be absorbed varies depending on the vehicle type and the like, and accordingly, the size and number (the number of steps) of the step portion 42 are also appropriately determined depending on the vehicle type and the like. Is set.

  As shown in FIGS. 5 and 6, the radiator support 13 is a plate-like long member, and is arranged so that the plate width direction faces the vehicle width direction, and the vehicle width direction cross section is open to the vehicle rear side. It is formed in a substantially hat shape. In other words, it does not have excessive strength with respect to the input from the upper front of the vehicle, has a certain degree of elasticity, and is easily deformed with respect to the load. Further, the hat-shaped plate surface 13b side is arranged so as to face the front of the vehicle, so that the device can be easily attached to the radiator support 13.

  FIG. 7 shows a state in which the radiator 31 is supported. The radiator 31 is integrally held by the frame member 32 together with a condenser of an air conditioner and a radiator fan (not shown) and is disposed at the front of the vehicle (the front of the food room). An attachment arm 33 and attachment feet 34 are provided on the side of the frame member 32, and the attachment arms 33 are attached to the radiator support 13, and the attachment feet 34 are attached so as to be placed on the upper surface of the side member 1. It has been. The radiator 31 is supported at a position below the cross member 14 of the radiator support 13, that is, at a position below a substantially central portion that is not affected even when the bending portion 41 of the so-called radiator support 13 is deformed. That is, the radiator 31 is firmly held by supporting both side portions by the side member 1 and the radiator support 13 via the frame member 32.

  As shown in FIGS. 1 and 2, a fender shield 8 is provided at a portion surrounded by the side member 1 in front of the strut house 16, the upper frame 6, and the connecting brace 7. The fender shield 8 is joined so that the rear side of the vehicle is continuous with the strut house 16, and the other three sides are joined to the side member 1, the upper frame 6, and the connecting brace 7. The strut house 16 is joined to the vertical wall of the dash panel 10.

  Next, a case where a pedestrian collides with a traveling vehicle will be described with reference to FIG.

  As shown in FIG. 8, when the pedestrian 52 collides with the vehicle, there is a possibility that the head 53 of the pedestrian 52 collides with the hood or the like at the front of the vehicle body. In general vehicles, the upper bar 12 is disposed together with the radiator support 13 to support the radiator at the front edge of the hood room at the front of the vehicle. Therefore, depending on the type of vehicle, a predetermined distance T along the bumper or hood from the road surface. The upper bar 12 serving as a rigid member is present at a site (for example, 1 m).

  In such a case, in the vehicle body structure of the present invention, when the head 53 is hit against the hood by the collision of the pedestrian 52, the hood is deformed downward and comes into contact with the upper bar 12. Since the upper bar 12 is pushed downward by the deformed hood, a load acts on the upper end portion 13 a of the radiator support 13. That is, a force acts to turn the upper end portion 13a downward with respect to the vehicle with the curved portion 41 as a fulcrum. When the load at this time is a predetermined value or more, the curved portion 41 of the radiator support 13 is deformed while absorbing the impact (load), and the upper end portion 13a side is displaced downward. At the same time, the impact load input to the upper bar 12 acts on the extending portion 11 of the upper frame 6, and the extending portion 11 is also deformed while absorbing the impact.

  And as shown by the dotted line of FIG. 8, the upper bar 12 is displaced to the vehicle lower side. The shock to the head 53 of the pedestrian 52 is mitigated by displacing the upper bar 12 while absorbing the impact load by the so-called radiator support 13 and the extending portion 11.

  At this time, the radiator support 13 is deformed only on the upper end portion 13a side by the bending portion 41, so that there is no influence on the support of the equipment such as the radiator 31, and the state where the radiator 31 and the like are securely held is maintained. is doing.

  As described above, in the vehicle body structure of the front portion of the vehicle according to the present invention, the curved portion 41 that is curved to extend rearward of the vehicle is provided above the radiator support 13, and the curved portion 41 is deformed with a predetermined load or more. Since 13a is displaced downward, the shock input to the upper bar 12 from the oblique upper part of the hood can be accurately absorbed by the deformation of the radiator support 13, and even in the event of a collision with the pedestrian 52, walking The impact on the person 52 can be reduced.

  In addition, since the radiator support 13 absorbs the impact caused by the collision by the deformation of the upper curved portion 41, the support state of the radiator 31 and the like is not affected, and the device such as the radiator 31 is reliably maintained. Is done. Accordingly, it is possible to prevent equipment such as the radiator 31 from being dropped and damaged. Further, the end portion of the upper bar 12 is supported by the extending portion 11 of the upper frame 6, and the impact (load) can be absorbed also by the extending portion 11. Therefore, the impact on the pedestrian can be further reduced by the synergistic effect with the curved portion 41.

  In addition, since the step portion 42 is formed in the bending portion 41, and the load for deforming the bending portion 41 is set by changing the size and number of the step portions 42, adjustment of the set load is easy. The impact input to the upper end portion 13a of the radiator support 13 can be absorbed accurately.

  The radiator support 13 is a plate-like long member extending in the vertical direction of the vehicle, and is disposed so that the plate width direction faces the vehicle width direction. Therefore, the radiator support 13 is excessively rigid with respect to the input load. It can be transformed without difficulty. That is, for example, when the plate width direction of the radiator support 13 is directed in the vehicle longitudinal direction, the rigidity of the radiator support 13 may be excessive with respect to the input from the front side of the vehicle, and the impact load cannot be absorbed efficiently. Since the plate width direction is the vehicle width direction and the radiator support 13 is in a relatively easily deformable state (orientation), it can be deformed straightly with respect to the input load, and the impact load can be absorbed efficiently. .

  In addition, since the cross section in the vehicle lateral direction of the radiator support 13 is a substantially hat type that opens to the rear side of the vehicle, it is possible to obtain support strength for the radiator or the like with a light and simple structure. Furthermore, since the surface portion 13b of the radiator support 13 faces the vehicle front side, equipment such as a radiator and lamps can be attached to the surface portion 13b by work from the front side of the vehicle 51, and workability is improved. Can do.

  Therefore, according to the vehicle body structure of the front part of the vehicle according to the present invention, it is possible to provide a structure including the radiator support 13 that can accurately mitigate the impact from the upper portion of the hood while the devices such as the radiator 31 are securely held. Therefore, safety in a collision with a pedestrian can be ensured without affecting the design of the vehicle and the arrangement of the devices. Furthermore, since damage to equipment such as a radiator can be suppressed, repair costs and the like can be reduced.

  In the above-described embodiment, the step portion 42 is formed in the bending portion 41, and the strength (setting load) of the bending portion 41 is adjusted by the size and number of the step portions 42. As shown, it is also possible to make a configuration in which the strength (setting load) is adjusted by forming the hole 61 in the bending portion 41 and adjusting the size and number of the holes.

  Although not shown, it is also possible to provide a configuration in which a bead is provided in a portion adjacent to the bending portion 41 to increase the strength around the bending portion 41 so that the bending portion 41 is positive.

  INDUSTRIAL APPLICABILITY The present invention can be used in the vehicle body structure industry field of a vehicle front portion provided with a radiator support at the vehicle front portion.

It is a perspective view showing the vehicle body structure of the vehicle front part which concerns on the example of 1 embodiment of this invention. It is an exploded view of a vehicle front part (Drawing 1). It is a side view of a vehicle front part (Drawing 1). FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. It is detail drawing of a radiator support curved part (periphery). FIG. 6 is a cross-sectional view taken along line B-B in FIG. 5. It is a perspective view showing the attachment state of a radiator. It is explanatory drawing of the relationship between a pedestrian and a vehicle body. It is detail drawing of the radiator support curved part (periphery) concerning other example embodiments.

Explanation of symbols

1 Front floor side member (side member)
2 Front End Cross Member 3 Front Pillar 4 Side Sill 5 Joint Protrusion 6 Upper Frame 7 Connection Brace 8 Fender Shield 9 Cowl Top Panel 10 Dash Panel 11 Extension Portion 12 Upper Bar 13 Radiator Support 14 Cross Member 15 Bolt 16 Strut House 41 Curve Part 42 step part 51 vehicle 52 pedestrian 53 head 61 hole

Claims (4)

An upper bar that supports a front portion of the full over de disposed front edge of the cabin front region of the vehicle,
A radiator support that supports the side of the radiator and extends in the vehicle vertical direction, and has an upper end connected to the upper bar ,
In the vehicle body structure of the front portion of the vehicle comprising an extended portion formed above the upper frame that extends to the left and right front of the passenger compartment ,
The radiator support is
A plate-like long member extending in the vehicle vertical direction, arranged so that the plate width direction faces the vehicle width direction, curved at the upper curved portion, and the upper end side extends in the vehicle front-rear direction and the upper Formed to connect to the bar ,
The extended portion is joined to the end of the upper bar that is curved toward the rear of the vehicle, in the vehicle width direction outside of the connecting portion between the upper bar and the radiator support, and at the rear of the vehicle.
The vehicle is characterized in that, when a predetermined load or more is input to the upper bar from above, the bending portion and the extending portion are deformed to allow a downward displacement of the upper end portion. Body structure. 2. The vehicle body structure for a vehicle front portion according to claim 1, wherein a stepped portion is formed in the curved portion of the radiator support so as to be recessed inside the curved portion. 3. In the vehicle body structure of the vehicle front part according to claim 1,
The vehicle body structure of the front part of the vehicle, wherein a hole is formed in the curved portion of the radiator support. In the vehicle body structure of the vehicle front part according to claim 1,
The radiator support is formed in a substantially U-shape or a substantially hat shape in which a cross section in the vehicle lateral direction opens to the rear side of the vehicle.

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