JP4285163B2 - Body front structure - Google Patents

Description

  The present invention relates to a vehicle body front structure, and more particularly, to a vehicle body front structure in which a suspension tower is disposed in a middle portion in the front-rear direction of a front side member in a vehicle body such as an automobile.

Conventionally, in a vehicle body front structure in which a suspension tower is disposed in a longitudinally middle portion of a front side member in a vehicle body such as an automobile, the front end of the wheel apron reinforcement is located in front of the suspension tower (front side frame (front side frame)). (Also referred to as Patent Document 1). Further, a configuration in which a dashboard is coupled to a suspension tower is known (see, for example, Patent Document 2). Further, a configuration is known in which a vertical wall is formed between the hood ridge and the strut housing, and the input accompanying the upward movement of the front side member is sufficiently transmitted to the skeleton member such as the hood ridge by the vertical wall (for example, And Patent Document 3). In addition, the reaction force generating member that receives a compressive load along the acting direction of deceleration at the time of a collision has a portion that contracts the longitudinal dimension by bending deformation, and bending deformation preventing means for preventing the occurrence of bending deformation, A configuration is known in which the bending deformation start point of the portion is set by setting the strength of the bending deformation prevention means (see, for example, Patent Document 4).
JP-A-2-246877 Utility model registration No. 2555646 gazette JP-A-10-258770 JP 2000-53020 A

  However, in Patent Document 1, the wheel apron reinforcement is offset outward in the vehicle width direction with respect to the front side member. As a result, the front end of the wheel apron reinforcement is obliquely coupled to the front side member as viewed from the front of the vehicle body. For this reason, compared with the case where the front side member is supported from directly above, the movement of the front side member to the upper side of the vehicle body at the time of a vehicle frontal collision cannot be effectively suppressed.

  In view of the above facts, an object of the present invention is to provide a vehicle body front structure that can effectively suppress the movement of a front side member upward of a vehicle body at the time of a vehicle body collision.

The vehicle body front part structure of the present invention according to claim 1 includes left and right front side members extending along the longitudinal direction of the vehicle body,
A suspension tower disposed in the longitudinal direction intermediate portion of the front side member of the right and left,
And extends along the vehicle width direction in front of the suspension tower, each coupled from the vertically upward in the vehicle front view to the front side members of said left and right, suppress the movement of the vehicle body above the left and right front side members Reinforcement to do,
An apron upper member disposed substantially along the longitudinal direction of the vehicle body at the upper part in the vehicle width direction of the left and right suspension towers;
Have a vehicle width direction end portion of the reinforcement is characterized by being coupled to the front wall portion of the suspension tower and the apron upper member.

Accordingly, the reinforcement that is coupled to the left and right front side members from the vertically upper side in front of the vehicle body in front of the suspension tower disposed in the middle of the front and rear direction of the left and right front side members extending along the longitudinal direction of the vehicle body. Accordingly , the left and right front side members are prevented from moving upward in the vehicle body at the time of a vehicle front collision. As a result, the moment length is long and a large canceling moment can be generated at the lower end of the kick portion of the front side member in the direction to cancel the upward moment generated at the time of the front collision. For this reason, the movement of the front side member to the upper side of the vehicle body at the time of the vehicle body front collision can be effectively suppressed. In addition, since the reinforcement extends along the vehicle width direction and the left and right front side members are coupled to each other, the upward movement of one of the front side members that occurs during an offset front collision is prevented. It can be suppressed by the tensile force of the reinforcement based on the joint between the front side member and the reinforcement. As a result, it is possible to effectively suppress the movement of the front side member upward of the vehicle body at the time of the offset front collision. Further, the passenger compartment can be enlarged by using the reinforcement as a dash panel that serves as a partition plate in front of the passenger compartment by connecting the left and right front side members to each other. Further, since the end portion in the vehicle width direction of the reinforcement is coupled to the apron upper member and the front wall portion of the suspension tower, the reinforcement rigidity of the reinforcement is increased. In addition, the rigidity of the suspension tower is increased.

According to a second aspect of the present invention, in the vehicle body front portion structure according to the first aspect, the reinforcement has a closed cross-sectional structure in a side view of the vehicle body.

Therefore, in addition to the content described in claim 1 , since the reinforcement has a closed cross-sectional structure in a side view of the vehicle body, the rigidity of the reinforcement is increased.

In the vehicle body front structure according the present invention according to claim 3 to claim 1 or claim 2, arranged a vehicle exterior parts between the front side members of said left and right, the upper surface of the vehicle outside part of the It is characterized in that the vehicle body is vertically below the upper surface of the left and right front side members.

Therefore, in addition to the contents described in claim 1 or claim 2 , the exterior part of the vehicle compartment is disposed between the left and right front side members, and the upper surface of the exterior part of the vehicle interior is located above and below the upper surface of the left and right front side members. Since the lower side of the direction is used, a portion of the reinforcement on the rear side of the vehicle body that is on the upper side of the vehicle body in the vertical direction with respect to the upper surface of the left and right front side members can be used as the vehicle compartment.

According to a fourth aspect of the present invention, in the vehicle body front part structure according to any one of the first to third aspects, the reinforcement is a dash panel .

Therefore, since the reinforcement is a dash panel that connects the left and right front side members to each other and serves as a partition plate in front of the passenger compartment, the passenger compartment can be enlarged.

The vehicle body front structure according to the first aspect of the present invention includes left and right front side members extending along the longitudinal direction of the vehicle body, and a suspension tower disposed at a middle portion in the longitudinal direction of the left and right front side members, in front of the suspension tower and extends along the vehicle width direction are respectively coupled from the vertically upward in the vehicle front view to the left and right front side members, for suppressing the movement of the vehicle body above the left and right front side members and reinforcement, the apron upper member in the vehicle width direction outer side upper portion of the left and right suspension towers arranged substantially along the longitudinal direction of the vehicle body, have a vehicle width direction end portion of the reinforcement is the apron upper member and a suspension tower movement for being coupled to a front wall portion, the vehicle body above the front side member of a vehicle body front collision Has an excellent effect can be effectively suppressed. Further, it has an excellent effect that the front side member can be effectively restrained from moving upward in the vehicle body at the time of the offset front collision and the vehicle compartment can be enlarged. Furthermore, the reinforcement rigidity of the reinforcement is increased and the rigidity of the suspension tower is increased.

The present invention according to claim 2 is the vehicle body front structure according to claim 1 , wherein the reinforcement has a closed cross-sectional structure as viewed from the side of the vehicle body. Therefore, in addition to the effect of claim 1 , the rigidity of the reinforcement is It has an excellent effect of becoming higher.

According to a third aspect of the present invention, in the vehicle body front part structure according to the first or second aspect , the vehicle exterior parts are disposed between the left and right front side members, and the upper surfaces of the vehicle exterior parts are arranged on the left and right front sides. In addition to the effect described in claim 1 or claim 2 , the vehicle compartment can be enlarged in addition to the effect described in claim 1 or claim 2 .

The invention according to claim 4 is the vehicle body front structure according to any one of claims 1 to 3, and the reinforcement is a dash panel, and therefore the effect according to any one of claims 1 to 3. In addition, it has an excellent effect that the passenger compartment can be enlarged.

  An embodiment of a vehicle body front structure according to the present invention will be described with reference to FIGS.

  In the figure, the arrow UP indicates the vehicle body upward direction, the arrow FR in the figure indicates the vehicle body front direction, and the arrow IN in the figure indicates the vehicle width inside direction.

  As shown in FIG. 3, front side members 12 are disposed along the vehicle body longitudinal direction at both ends in the vehicle width direction at the front portion of the vehicle body 10 of the present embodiment. A front bumper reinforcement 14 is installed at the front end portion 12A of the left and right front side members 12, and when the vehicle body 10 has a front collision (front collision), the collision load input to the front bumper reinforcement 14 is changed to the left and right. Is received by the front side member 12.

  The front portion 12B of the front side member 12 is linearly disposed along the vehicle longitudinal direction, and has a closed cross-sectional structure with a rectangular cross-sectional shape viewed from the vehicle longitudinal direction. Further, the front portion 12B of the front side member 12 is made of an aluminum extruded material, and the rear portion 12C of the front side member 12 is made of an aluminum casting, which are coupled to each other.

  The rear portion 12C of the front side member 12 includes a base portion 20 that is coupled to the rear of the front portion 12B toward the rear of the vehicle body, and a step pressure receiving portion 22 that is formed below the base portion 20.

  The rear portion of the rear portion 12C of the front side member 12 is a kick portion 12D inclined from the upper front side of the vehicle body toward the lower rear side of the vehicle body, and a floor under reinforcement as a vehicle body skeleton member is provided at the lower end portion 12E of the kick portion 12D. It is coupled to the front end portion 26A of the ment 26.

  A suspension member 30 is coupled to a front end lower part 22A of the step pressure receiving part 22 and a lower end part 12E of the kick part 12D in the rear part 12C of the front side member 12, and a base part 20 of the rear part 12C of the front side member 12 is provided. The suspension member 30 is provided with a wheel 38 having a wheel-in motor 36 and no drive shaft via suspension arms 32 and 34.

  Further, the outer side end 40A of the dash cross lower 40 is coupled to the kick portions 12D of the left and right front side members 12, and the dash cross lower 40 is made of aluminum having a closed cross section extending in the vehicle width direction. It is made of extruded material.

  As shown in FIG. 2, suspension towers 42 are respectively disposed in the front-rear direction intermediate portions of the left and right front side members 12, and apron upper members 44 are disposed on the upper outer sides in the vehicle width direction of the left and right suspension towers 42. Is disposed substantially along the longitudinal direction of the vehicle body.

  As shown in FIG. 1, the cross-sectional shape of the apron upper member 44 viewed from the front-rear direction of the vehicle body is a rectangular closed cross-sectional structure.

  As shown in FIG. 2, a dash reinforcement 48 as a reinforcement is disposed along the vehicle width direction between the front end portions 44A of the left and right apron upper members 44. The dash reinforcement 48 is viewed in plan view. The arc shape bulges forward in the vehicle body. Further, the vehicle width direction end portion 48A of the dash reinforcement 48 is coupled to the vehicle width direction inner side portion of the front end portion 44A of the left and right apron upper members 44, and the vehicle width direction end portion 48A of the dash reinforcement 48 is left and right. The suspension tower 42 is coupled to the front wall portion 42A.

  Further, a portion 48B of the dash reinforcement 48 near the vehicle width direction end portion 48A is coupled to the front side member 12 from vertically above, that is, directly above the left and right front side members 12 when viewed from the front of the vehicle body.

  As shown in FIG. 1, the cross-sectional shape of the dash reinforcement 48 viewed from the vehicle width direction (the side view of the vehicle body) is a rectangular closed cross-sectional structure, and the lower end of the dash reinforcement 48 faces the rear of the vehicle body. A flange 48C is formed. Further, a cowl 48D is formed at the upper end of the dash reinforcement 48 toward the front of the vehicle body.

  As shown in FIG. 2, a plurality of vehicle exterior parts 52 such as pumps and compressors are spaced in the vehicle width direction at a predetermined interval in the vehicle front-rear direction at a portion between the left and right front side members 12 in plan view. It is arranged along.

  As shown in FIG. 1, the upper surface 52 </ b> A of the vehicle exterior component 52 is disposed below the upper surface 12 </ b> F of the left and right front side members 12 in the vehicle body vertical direction.

  Accordingly, a portion 60 that is located above the upper surface 12F of the left and right front side members 12 on the vehicle rear side of the dash reinforcement 48 can be used as a part of the vehicle compartment 62.

  As shown in FIG. 2, a tunnel reinforcement 60 is disposed in the vehicle width direction central portion on the rear side of the vehicle body at the lower part of the dash cross lower 40, and left and right fronts are provided on the rear side of the lower part of the dash cross lower 40. The floor under reinforcement 26 and the rocker 62 are connected via the rear end portion 12G of the side member 12.

  Next, the operation of this embodiment will be described.

  In the present embodiment, as shown in FIG. 1, when the vehicle body 10 collides forward with the collision body S, the left and right front side members 12 receive a collision load input to the front bumper reinforcement 14. At this time, if the front side member 12 is to be deformed upward in the vehicle body, the front side member is viewed from the vertically upper side in front of the vehicle body in front of the suspension tower 42 disposed in the middle part in the front-rear direction of the front side member 12. A pressing force F acts on the front side member 12 from the upper side of the vehicle body to the lower side of the vehicle body by the dash reinforcement 48 coupled to the vehicle body 12.

  As a result, the dash reinforcement 48 is arranged behind the suspension tower 42 in the direction P to cancel the upward moment M1 generated at the time of the front collision in the center P of the lower end 12E of the kick portion 12D of the front side member 12. It is possible to generate a large canceling moment M2 having a long moment length L compared to the case where it is provided. For this reason, the dash reinforcement 48 can effectively suppress the upward movement of the front side member 12 at the time of the vehicle front collision.

  In the present embodiment, the dash reinforcement 48 extends along the vehicle width direction, and the dash reinforcement 48 joins the left and right front side members 12 to each other. As a result, the upward movement of one front side member 12 that occurs at the time of the offset front collision is a dash reinforcement whose origin P2 (see FIG. 2) is the joint between the other front side member 12 and the dash reinforcement 48. It can be suppressed by a pulling force of 48. For this reason, the movement of the front side member 12 to the upper side of the vehicle body at the time of the offset front collision can be effectively suppressed.

  Further, in the present embodiment, since the dash reinforcement 48 has a closed cross-sectional structure when viewed from the side of the vehicle body, the rigidity of the dash reinforcement 48 is increased, and the movement of the front side member 12 upward of the vehicle body can be effectively suppressed.

  In the present embodiment, the vehicle width direction end portion 48A of the dash reinforcement 48 is coupled to the front end portion 44A of the apron upper member 44 and the front wall portion 42A of the suspension tower 42, so that the dash reinforcement 48 is coupled. The rigidity is increased, and the movement of the front side member 12 upward of the vehicle body can be effectively suppressed. Moreover, the rigidity of the suspension tower 42 is also increased.

  Further, in the present embodiment, the vehicle exterior component 52 is disposed between the left and right front side members 12, and the upper surface 52A of the vehicle exterior component 52 is lower than the upper surface 12F of the left and right front side members 12 in the vehicle body vertical direction. Therefore, since the part 60 which is on the vehicle body rear side of the dash reinforcement 48 and is located above the upper surface 12F of the left and right front side members 12 in the vehicle body vertical direction can be used as a part of the vehicle compartment 62, the vehicle compartment 62 can be enlarged.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in the above embodiment, the dash reinforcement 48 having a closed cross-sectional structure in the side view of the vehicle body as the reinforcement is disposed between the front end portions 44A of the left and right apron upper members 44. A dash panel having a plate shape in a side view of the vehicle body may be disposed between the front end portions 44A of the apron upper member 44.

  In the above embodiment, the wheel 38 having the wheel-in motor 36 and having no drive shaft is attached to the base 20 of the rear portion 12C of the front side member 12 and the suspension member 30 via the suspension arms 32 and 34. Instead of this, a wheel having a drive shaft may be attached to the base portion 20 of the rear portion 12C of the front side member 12 and the suspension member 30 via suspension arms 32 and 34.

  Further, in the above embodiment, the front portion 12B of the front side member 12 is made of aluminum extruded material, and the rear portion 12C of the front side member 12 is made of cast aluminum. However, the configuration of the front side member 12 is limited to this. Instead, the front portion 12B and the rear portion 12C of the front side member 12 may be integrated. The front side member 12 may be made of other materials such as a metal other than aluminum.

FIG. 3 is an enlarged sectional view taken along line 1-1 of FIG. It is a top view which shows the vehicle body front part to which the vehicle body front part structure which concerns on one Embodiment of this invention is applied. It is the perspective view seen from the vehicle body diagonally rear which shows the vehicle body front part to which the vehicle body front part structure which concerns on one Embodiment of this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Automobile body 12 Front side member 12F Upper surface of front side member 42 Suspension tower 42A Front wall part of suspension tower 44 Apron upper member 44A Front end part of apron upper member 48 Dash reinforcement (reinforcement)
48A Dash reinforcement end in the vehicle width direction 52 Vehicle exterior parts 52A Upper surface of vehicle exterior parts

Claims (4)

Left and right front side members extending along the longitudinal direction of the vehicle body,
A suspension tower disposed in the longitudinal direction intermediate portion of the front side member of the right and left,
And extends along the vehicle width direction in front of the suspension tower, each coupled from the vertically upward in the vehicle front view to the front side members of said left and right, suppress the movement of the vehicle body above the left and right front side members Reinforcement to do,
An apron upper member disposed substantially along the longitudinal direction of the vehicle body at the upper part in the vehicle width direction of the left and right suspension towers;
Yes, and the vehicle body front structure in the vehicle width direction end portion of the reinforcement is characterized in that it is coupled to the front wall portion of the suspension tower and the apron upper member a. The vehicle body front structure according to claim 1, wherein the reinforcement has a closed cross-sectional structure in a side view of the vehicle body. The vehicle exterior part is disposed between the left and right front side members, and the upper surface of the vehicle exterior part is lower than the upper surface of the left and right front side members in the vehicle body vertical direction. The vehicle body front part structure according to claim 2 . The vehicle body front structure according to any one of claims 1 to 3, wherein the reinforcement is a dash panel .

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