JP2008137553A - Vehicle body structure of vehicle front part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain safety by efficiently and surely absorbing collision energy without hindering destruction of a side member 1 by a radiator support 13. <P>SOLUTION: A connecting brace 7 is connected to a front end surface of the side member 1 and a front end surface of an upper frame 6. A lower end of the radiator support 13 is joined to a portion located between the upper frame 6 of the connecting brace 7 and the side member 1. The radiator support 13 does not hinder destruction of the side member 1 on a collision to enhance shock absorbing performance in the side member 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

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.

  Conventionally, a general vehicle has a vehicle body structure for protecting an occupant by mitigating an impact when the vehicle collides with another vehicle or the like at the front portion of the vehicle. The side member is configured so as to be crushed sequentially from the front end side to the rear side to absorb the impact.

  On the other hand, a radiator support for mounting a device such as a radiator is usually provided at the front of the vehicle. 2. Description of the Related Art A structure in which a radiator support is provided so as to extend in the vertical direction of a vehicle over an upper bar that supports a hood and a side member has been conventionally known (see, for example, Patent Document 1). That is, the upper ends of the two long radiator supports are joined to the upper bar that supports the front edge of the hood in the engine room, and the radiator supports are joined to the side surfaces near the front end portions of the side members.

  The two radiator supports are joined to the upper bar and the side member, so that the weight of a device such as a radiator is supported by the upper bar and the side member and is fixed securely.

JP 2005-119537 A

  However, in the conventional vehicle body structure of the front part of the vehicle, the radiator support is joined to the side surface of the side member, so that the strength of the side member partially increases at the joined part. For this reason, rigidity is excessive in the vicinity of the joint portion of the side member with the radiator support, and therefore, there is a possibility that the side member is left without being destroyed only in the vicinity of the joint portion at the time of a vehicle collision. If the crushing residue is generated in the side member, the collision energy absorption efficiency is deteriorated accordingly, and there is a possibility that the vehicle compartment side is adversely affected, for example, the amount of deformation of the vehicle compartment is increased.

  In order to solve this problem, it is necessary to extend the length of the side member in front of the passenger compartment so that the collision energy can be sufficiently absorbed. However, if this is done, the vehicle becomes larger or the passenger compartment space must be sacrificed. There is a risk that the design will be limited. In particular, in the case of a light vehicle with a limited vehicle size, it is a problem because it is greatly affected.

  In addition, for energy absorption at the time of collision, it is desirable from the viewpoint of reducing the impact on the occupant that the side members are sequentially destroyed from the tip, but a radiator support is joined to the tip of the side member as in the structure of Patent Document 1. If this is the case, the joint part prevents the side member from being broken from the front end part, and the rear side is destroyed first, and the side member is not crushed smoothly in the axial direction. There is a possibility that the collision energy cannot be sufficiently absorbed, such as breaking from the side.

  The present invention has been made in view of the above situation, and the vehicle body structure of the front portion of the vehicle that can efficiently and reliably absorb the collision energy and maintain safety without disturbing the destruction of the side member by the radiator support. The purpose is to provide.

  In order to achieve the above object, the vehicle body structure of the vehicle front portion of the present invention according to claim 1 has a base end on a pair of front pillars that are positioned on the left and right of the vehicle front portion of the vehicle and extend vertically. A pair of left and right upper frames that are joined and extend forward of the vehicle, and a pair of left and right upper frames that are disposed inward in the vehicle width direction from the front pillar and below the upper frame and extend forward of the vehicle compartment In the vehicle body structure of the front part of the vehicle including the side member of the vehicle and a radiator support that is provided at the front part of the vehicle and supports the radiator, a connecting member that connects the front end face of the side member and the front end face of the upper frame is provided. The lower end of the radiator support is joined to a portion of the connecting member located between the upper frame and the side member.

  In the first aspect of the present invention, the connecting member for connecting the front end surface of the side member and the front end surface of the upper frame is provided, and the lower end of the radiator support is joined to the connecting portion. The collision energy is smoothly absorbed from the front end to the rear side, and the shock absorbing performance can be sufficiently exhibited. Therefore, there is no need to extend the side member in consideration of the remaining crushing, etc., so there are no problems such as a large vehicle or a narrow vehicle compartment space. It becomes possible to do.

  And the vehicle body structure of the vehicle front part of this invention which concerns on Claim 2 is a vehicle body structure of the vehicle front part of Claim 1. WHEREIN: The said connection member goes to a vehicle width direction outer side by the front view from a vehicle front. According to the above, it is arranged to be inclined upward.

  In the present invention according to claim 2, since the connecting member is disposed so as to incline upward in the vehicle width direction, the collision energy input to the side member can be efficiently distributed to the upper frame side. In addition, it is possible to secure a large area received from the front of the vehicle by the connecting member, and it is possible to efficiently prevent the mating structure from entering in an offset collision or the like.

  According to a third aspect of the present invention, the vehicle body structure of the vehicle front portion according to the present invention is the vehicle body structure of the vehicle front portion according to the first or second aspect, wherein the radiator support has a lower portion in the vehicle width direction with respect to the upper portion. It is the shape arranged on the outer side, It is characterized by the above-mentioned.

  In the present invention according to claim 3, since the lower portion of the radiator support is arranged on the outer side in the vehicle width direction with respect to the upper portion, it becomes a framework shape constituting a part of the truss and the support rigidity of the radiator and the like is ensured. .

  According to a fourth aspect of the present invention, the vehicle body structure of the vehicle front portion according to the present invention is the vehicle front body structure according to any one of the first to third aspects, wherein the radiator support has an upper end in front of the hood. It is joined to the upper bar which supports an edge, and is arranged over the upper bar and the connecting member.

  In the present invention according to claim 4, since the radiator support is disposed between the upper bar and the connecting member, the radiator support is strengthened and the radiator can be supported more reliably.

  According to a fifth aspect of the present invention, there is provided a vehicle body structure of a vehicle front portion according to the present invention, wherein the radiator is held by a frame member in the vehicle body structure of the vehicle front portion according to any one of the first to fourth aspects. A material is placed on the upper surface of the side member, and an upper portion of the frame member is attached to the radiator support.

  In the present invention according to claim 5, since the radiator frame member is supported on the radiator support at the upper portion and placed on the upper surface of the side member, the radiator can be stably held without disturbing the destruction of the side member by the radiator. can do.

  The vehicle body structure of the front part of the vehicle according to the present invention can maintain safety by absorbing collision energy efficiently and reliably without being disturbed by the radiator support.

  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 a disassembled state of FIG. 1, FIG. 3 is a side view state of FIG. 1, and FIG. 1 is a front view situation, FIG. 5 is a plan view situation of FIG. 1, FIG. 6 is a cross-sectional view taken along line AA in FIG. 4, FIG. 7 is a perspective view showing a radiator mounting state, FIG. Fig. 9 shows a front view situation with a radiator attached, and Fig. 9 shows a schematic side view situation showing a radiator mounted state.

  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 the area of the front part of the vehicle covered with the hood, and in the case of a vehicle in which the engine is placed in the front part, it is generally called the engine room. Refers to the part.

  As shown in FIGS. 1 and 2, the front pillar 3 is inclined upward and rearward on the upper side of the vehicle and connected to a roof pillar (not shown), and the lower side is arranged in parallel with the side member 1 at the lower end and extends rearward of the vehicle. It is connected to the side sill 4. A reinforcing brace 8 as a reinforcing member is provided between the front end portion of the side sill 4 (the lower end portion of the front pillar 3) and the side member 1, and connects the side sill 4 and the side member 1. .

  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.

  The base end side of the upper frame 6 is formed so that the shape of the lower edge portion is curved downward as it goes rearward of the vehicle. Further, the lower edge portion of the joining protrusion 5 that continues from the front edge portion of the front pillar 3 is formed in a curved shape along the curvature of the lower edge portion of the upper frame 6, and the upper frame 6 is joined to the front pillar 3. In this state, the lower edge portion of the upper frame 6 and the front edge portion of the front pillar 3 are configured to be continuous.

  Further, the upper edge portion of the upper frame 6 at the base end side has a substantially horizontal shape, and the load transmitted to the upper frame 6 is guided to the lower side of the front pillar 3.

  On the other hand, the front end side of the upper frame 6 is formed to bend downward, and a connecting brace 7 to be joined to the front end face of the side member 1 is joined to the front end face of the upper frame 6. The lower edge of the connecting brace 7, the lower edge of the upper frame 6, and the front edge of the front pillar 3 are configured to have a continuous arch shape when viewed from the vehicle lateral direction.

  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 FIGS. 3 to 5, the connecting brace 7 continuously extends from the front end portion of the upper frame 6 in the vehicle width direction. Extending diagonally inward and joined to the front end surface of the side member 1 located in front of the vehicle relative to the front end surface of the upper frame 6, the connecting brace 7 extends upward in the vehicle width direction when viewed from the front of the vehicle. It is arranged to incline. That is, the connecting brace 7 is joined across the front surface of the front end of the side member 1 and the front surface of the front frame 6.

  As shown in FIG. 6, the connecting brace 7 has a closed cross section composed of an outer panel 7 a and an inner panel 7 b, and is welded so that the inner panel 7 b of the connecting brace 7 closes the front surface of the front end portion of the side member 1. It is joined. The front end cross member 2 is coupled to the front surface of the outer panel 7 a of the connecting brace 7.

  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. 4), 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.

  As shown in FIGS. 1, 3, and 4, the upper frame 6 is formed with an extending portion 11 that extends above the vehicle. An end of an upper bar 12 that supports the front edge of the hood is joined to the extended portion 11, and the upper bar 12 is supported by the extended portion 11. The upper bar 12 is a structural member arranged in the vehicle width direction at the front portion of the hood room (a region in front of the vehicle compartment), 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 4, a pair of left and right radiator supports 13 for supporting a radiator and the like are provided across the upper bar 12 and the connecting brace 7 at the front portion of the food room. The radiator support 13 is a member extending in the vertical direction of the vehicle, and has an upper end coupled to the lower surface of the upper bar 12 by a bolt (not shown), and a lower end coupled to the side member 1 and the upper frame 6 of the connecting brace 7. It is joined to the part located between. And the radiator support 13 is arrange | positioned so that a lower side may spread on the vehicle width direction outer side with respect to an upper side, and when a pair of radiator support 13 is seen from the vehicle front, it becomes a substantially square shape (refer FIG. 4). The left and right radiator supports 13 are connected to each other by a cross member extending in the vehicle width direction in the vicinity of a substantially central portion in the vertical direction. The radiator support 13 holds a device such as a lamp.

  As shown in FIGS. 7 to 9, the radiator 31 is integrally held by a frame member 32 as a frame member together with a condenser of an air conditioner and a radiator fan (not shown), and is disposed in the front part of the vehicle (the front part of the food room). An attachment arm 33 is provided on the upper side of the frame member 32, and an attachment foot 34 is provided on the lower side of the frame member 32. The attachment arm 33 is attached to the radiator support 13, and the attachment foot 34 is It is placed on the upper surface of the side member 1.

  Specifically, a bolt mounting hole 81 is provided in the mounting arm 33 of the frame member 32, and the mounting arm 33 is mounted to the radiator support 13 by a bolt (not shown) through the bolt mounting hole 81. Further, a fitting pin 82 is provided below the mounting leg 34 of the frame member 32, and a fitting hole 83 into which the fitting pin 82 is fitted is provided on the upper surface of the side member 1. Then, by fitting the fitting pin 82 of the attachment foot 34 of the frame member 32 into the fitting hole 83, the attachment foot 34 is placed on the upper surface of the side member 1.

  That is, the radiator 31 is installed at the front portion of the vehicle by supporting the upper side with the radiator support 13 with both side portions being placed on the upper surface of the side member 1. Further, as shown in FIG. 9, the mounting foot 34 is provided to be inclined with respect to the radiator 31, and the fitting pin 82 is fitted substantially vertically into the fitting hole 83 of the side member 1, thereby the radiator. 31 is supported in a state where the lower side is inclined toward the vehicle rear side.

  The fitting pin 82 of the mounting foot 34 of the frame member 32 is strong enough to be broken by an impact such as a collision, and does not disturb the destruction (collapse) of the side member 1.

  As shown in FIGS. 1, 2, and 5, a fender shield 14 is provided at a portion surrounded by the side member 1, the upper frame 6, and the connecting brace 7 in front of the strut house 16. The fender shield 14 is joined so that the vehicle rear side 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 rear part of the strut house 16 is joined to the vertical wall of the dash panel 10.

  In the vehicle body structure of the vehicle front portion according to the present invention as described above, the connecting brace 7 is connected across the front end surface of the side member 1 and the front end surface of the upper frame 6, and the lower end of the radiator support 13 is joined to the connecting brace 7. (Refer to FIGS. 3 to 6), the radiator support 13 does not prevent the side member 1 from being destroyed in the event of a collision, and the collision energy is smoothly absorbed from the front end to the rear side, so that the shock absorption performance is sufficiently high. It can be demonstrated. And since the connection brace 7 is joined to the front surface of the front end of the side member 1, the destruction of the side member 1 is not disturbed, and the role of collision energy absorption can be shared by the closed cross section.

  Further, since the connecting brace 7 is disposed so as to be inclined upward and outward in the vehicle width direction, the collision energy input to the side member 1 can be efficiently distributed to the upper frame 6 side, and the connecting brace 7 can be used from the front of the vehicle. It can secure a large area and can effectively prevent the entry of the opponent structure in an offset collision, etc., especially in the case of a collision with the vehicle, to the passenger compartment side at the time of the collision regardless of the size and weight of the opponent vehicle It is possible to minimize the entry of the structure (side member, etc.) of the other vehicle.

  The radiator support 13 has an upper end joined to the upper bar 12 that supports the front edge of the hood, and is disposed between the upper bar 12 and the connecting brace 7, and further, the lower side extends substantially outward in the vehicle width direction. Therefore, the pair of radiator supports 13 forms a frame structure that forms part of the truss, and the radiator support 13 is strengthened. Therefore, the support rigidity of the radiator 31 and the like is ensured, and the radiator 31 (see FIGS. 7 to 9) can be supported more reliably.

  In addition, since the radiator 31 is held by the frame member and the frame member 32 is placed on the upper surface of the side member 1 and the upper portion is coupled to the radiator support 13 and supported, the radiator 31 destroys the side member 1. The radiator 31 can be stably held (installed) without interfering with the above.

  Moreover, since the fender shield 14 is joined to the part surrounded by the side member 1 in front of the strut house 16, the upper frame 6 and the connecting brace 7, deformation of the region surrounded by these four members can be suppressed. Therefore, when the vehicle collides, the upper frame 6 can be prevented from being bent in the middle and can be sequentially broken from the front end to the rear end, so that the collision energy can be efficiently absorbed.

  Further, in addition to the above-described effects, in the vehicle body structure of the vehicle front portion according to the present invention, the end portion of the upper bar 12 that supports the front edge of the hood in the front region of the passenger compartment is joined to the extending portion 11 of the upper frame 6. Therefore, when there is excessive input to the upper bar 12 from above the hood (for example, excessive input from the hood due to a pedestrian collision or the like), the extension portion 11 is deformed to absorb the excessive input. can do.

  Further, since the front end cross member 2 is coupled with the bolt 15, the front end cross member 2 can be easily removed during maintenance or the like.

  As described above, according to the vehicle body structure of the front portion of the vehicle according to the present invention, it is possible to increase the collision energy absorption efficiency while securing the support rigidity of the radiator, and thus the radiator support is joined to the side portion of the side member. Compared to the conventional structure, a structure in which the radiator is reliably supported and the collision energy absorption efficiency is high can be obtained.

  Therefore, the deformation amount of the passenger compartment can be improved without increasing the length of the side member in the vehicle front-rear direction. Conversely, the amount of deformation of the passenger compartment can be maintained even if the length of the side member in the vehicle longitudinal direction is shortened.

  In short, since the radiator support 13 does not hinder the destruction of the side member 1 at the time of a collision, it is not necessary to extend the side member 1 in consideration of the remaining crushing, etc., and the vehicle becomes larger and the passenger compartment space becomes narrower. In addition to eliminating this problem, the vehicle can be made more compact and the passenger compartment space can be increased.

  In other words, the vehicle body structure of the vehicle front portion according to the present invention can maintain the safety by absorbing the collision energy efficiently and surely without disturbing the destruction of the side member by the radiator support.

  INDUSTRIAL APPLICABILITY The present invention can be used in the industrial field of a vehicle body structure 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 a disassembled perspective view of a vehicle front part (FIG. 1). It is a side view of a vehicle front part (Drawing 1). It is a front view of a vehicle front part (Drawing 1). It is a top view of a vehicle front part (Drawing 1). FIG. 5 is a cross-sectional view taken along line AA in FIG. 4. It is a perspective view showing the attachment state of a radiator. It is a front view in the state where a radiator was attached. It is a schematic side view showing the attachment state of a radiator.

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 Reinforcement Brace 9 Cowl Top Panel 10 Dash Panel 11 Extension Portion 12 Upper Bar 13 Radiator Support 14 Fender Shield 15 Bolt 16 Strut House 31 Radiator 32 Frame member 33 Mounting arm 34 Mounting foot 81 Mounting hole 82 Fitting pin 83 Fitting hole

Claims (5)

A pair of left and right upper frames that are extended to the front of the vehicle by joining a base end to a pair of front pillars that are positioned on the left and right of the front part of the vehicle compartment and extend in the vertical direction. A vehicle front portion including a pair of left and right side members that are disposed inward in the direction and below the upper frame and extend forward of the vehicle compartment, and a radiator support that is provided in the vehicle front portion and supports the radiator In the body structure of
A connecting member for connecting the front end surface of the side member and the front end surface of the upper frame is provided, and the lower end of the radiator support is joined to a portion of the connecting member positioned between the upper frame and the side member. A vehicle body structure at the front of the vehicle. In the vehicle body structure of the vehicle front part according to claim 1,
The vehicle body structure of the front portion of the vehicle, wherein the connecting member is inclined upward as it goes outward in the vehicle width direction when viewed from the front of the vehicle. In the vehicle body structure of the vehicle front part according to claim 1 or claim 2,
The radiator support has a shape in which the lower part is arranged on the outer side in the vehicle width direction with respect to the upper part. In the vehicle body structure of the vehicle front part as described in any one of Claims 1-3,
The radiator support is joined to an upper bar whose upper end supports the front edge of the hood,
A vehicle body structure at a front portion of the vehicle, which is disposed between the upper bar and the connecting member. In the vehicle body structure of the vehicle front part as described in any one of Claims 1-4,
The radiator is held by a frame member;
The vehicle body structure according to claim 1, wherein the frame member is placed on an upper surface of the side member, and an upper portion of the frame member is attached to the radiator support.

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