JP6507873B2 - Car body front structure of car - Google Patents

Description

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

  BACKGROUND ART Conventionally, techniques for reducing weight by forming body panels such as floor panels and pillar panels with fiber reinforced resin have been promoted. Further, the upper end portion of the front pillar lower portion (body side front portion) extending upward is joined to the rear end portion of the upper member (hood ridge) extending in the front and rear direction, and in the upper and lower direction A vehicle front portion structure is known in which the lower end portions of front pillars extending to the front are joined together (see, for example, Patent Document 1).

JP, 2014-91462, A

Here, in the prior art described above, when a load directed to the rear of the vehicle is input to the upper member, the load is transmitted to the front pillar lower portion, and the joint portion between the upper member and the front pillar lower portion tends to move rearward.
However, as described above, since the lower end of the front pillar is joined to the upper side of the joint between the upper member and the front pillar lower, the lower end of the front pillar is separated from the joint between the upper member and the front pillar lower. There is a risk of When this separation occurs, there is a problem that it is difficult to sufficiently transmit the load input to the upper member to the front pillar.

  Then, an object of this invention is to provide the vehicle body front structure of the motor vehicle which transmits efficiently the load input into the vehicle body front part to a front pillar.

In the vehicle body front structure of the automobile according to the present invention, the front pillar extends upward from the vicinity of the rear end of the hood ridge. The lower part of the front pillar made of fiber reinforced resin is disposed on the rear side of the rear end of the hood ridge.
The lower portion of the front pillar and the upper portion of the body side front extending in the vertical direction are joined so as to form an overlapping portion along the vehicle vertical direction. The entire rear end portion of the hood ridge is joined from the front side in the vehicle front-rear direction so that the entire rear end of the hood ridge overlaps the portion where the lower portion of the front pillar and the upper portion of the body side front overlap.

  In the vehicle body front structure of the automobile according to the present invention, the lower portion of the front pillar is disposed on the rear side of the rear end portion of the hood ridge. Therefore, when a load directed to the rear of the vehicle is input to the hood ridge, this load is transmitted to the front pillar. Therefore, in the present invention, the load input to the front of the vehicle can be efficiently transmitted to the front pillar.

FIG. 1 is a side view showing a vehicle body front structure of an automobile according to a first embodiment of the present invention. It is the perspective view which looked at FIG. 1 from diagonally upward. It is a disassembled perspective view of FIG. It is a perspective view which shows the assembly method of the component of FIG. It is a side view which shows the state which removed the hood ridge and the body side panel from FIG. It is an exploded view of FIG. It is sectional drawing by the AA of FIG. FIG. 8 is a cross-sectional view corresponding to FIG. 7 according to a second embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 7 and 8, the front of the vehicle is indicated by FR, the rear of the vehicle is indicated by RR, the outside of the vehicle compartment is indicated by OTR, and the inside of the vehicle interior is indicated by INR.

First Embodiment
A vehicle body front structure of an automobile according to a first embodiment of the present invention will be described using FIGS. 1 to 7.

  As shown in FIGS. 1 to 3, a hood ridge 1 extending along the longitudinal direction of the vehicle is provided at the front of the vehicle body according to the present embodiment. Behind the hood ridge 1, a body side panel 3 disposed on the side of the vehicle body is disposed. Further, a roof 5 extending in the front-rear direction and the vehicle width direction is bridged to the upper portions of the pair of left and right body side panels 3. A portion corresponding to the front pillar 7 in the front portion of the body side panel 3 is cut out, and the front pillar 7 configured separately from the body side panel 3 is disposed in the cutout portion. There is.

  The hood ridge 1 is formed in an L shape when viewed from the front of the vehicle, and has a horizontally extending upper surface 9 and a side surface 11 bent at the outer end in the vehicle width direction of the upper surface 9 and extending downward. , Is integrally constructed. The rear end portion 13 of the hood ridge 1 is joined to the upper end portion 17 of the body side front portion 15 of the body side panel 3 as described later. Further, the rear end portion of the top surface 9 of the hood ridge 1 is formed as a rear end inclined portion 19 bent obliquely upward. The rear end portion of the side surface 11 and the rear end inclined portion 19 of the upper surface 9 are formed as a joint portion joined to the upper end portion 17 of the body side front portion 15 of the body side panel 3.

  The body side panel 3 is disposed at the lower end and extends in the longitudinal direction of the vehicle, a body side center pillar portion 23 extending upward from the central portion in the longitudinal direction of the body side sill portion 21, and a body side center pillar A body side roof side portion 25 coupled to the upper end of the portion 23 and integrally extending along the vehicle longitudinal direction, and a body side front portion 15 extending upward from the front end of the body side sill portion 21 are integrally formed. The body side roof side portion 25 is joined to the flange 27 of the peripheral portion of the roof 5, and the front end of the roof 5 and the front end of the body side roof side portion 25 are set at the same longitudinal position.

  Moreover, the upper edge 29 of the body side front part 15 inclines diagonally downward as it goes back, when it sees from a side (refer FIG. 1). The body side front portion 15 is bent at a side edge 31 extending in the vertical and longitudinal directions, a front face 33 bent at the front end of the side face 31 and extending to the vehicle interior, and a vehicle interior side end at the front 33 Extension flange 35 and junction flange 37 extending forward of the vehicle, a rear surface 39 bent at the rear end of the side surface 31 and extending toward the vehicle interior, and bent at the vehicle interior end at the rear surface 39 and extend rearward The mounting surface 41 and the joining flange 43 and the extending flange 45 which are formed at the rear end of the extending surface 41 and extend in the vertical direction are formed in a hat shape in section. In FIGS. 3 and 4, the gray portion is a joining portion to be welded and joined, and the rear end inclined portion 19 of the top surface 9 of the hood ridge 1 is joined to the upper end portion 17 of the body side front portion 15. A bonding flange 49 disposed on the inner side of the inclined surface 47 and the inner surface of the inclined surface 47 is provided.

  The front pillar 7 is made of fiber reinforced resin and formed in a hat shape in cross section. The lower portion 51 has a side wall 53 extending in the vertical and longitudinal directions, a front wall 55 bent at the front end of the side wall 53 and extending toward the vehicle interior, and a vehicle interior side end bent at the front wall 55 A first metal flange 57 (see FIGS. 3, 5 and 6) made of steel plate extending forward, a rear wall 59 bent at the rear end of the side wall 53 and extending toward the vehicle interior, and the vehicle interior side of the rear wall 59 It comprises an extending flange 61 bent at one end and extending rearward of the vehicle, and a second metal flange 63 (see FIGS. 3, 5 and 6) provided at the rear end of the extending flange 61 and made of steel plate. The upper surface of the lower portion 51 of the front pillar 7 is formed as an inclined wall 65 which abuts on the inclined surface 47 at the upper end of the body side front portion 15. A three metal flange 67 (see FIGS. 3, 5 and 6) is provided. Here, the third metal flange 67 is composed of a lower side 69 and an upper side 71. The lower side 69 is joined to the joining flange 49 of the upper end 17 of the body side front portion 15 and the joining flange 89 of the dash side 83. Further, as shown in FIG. 2, the upper portion 71 is directly joined to the end of the cowl box 73 in the vehicle width direction. The upper portion 76 disposed between the lower portion 51 and the upper end portion 75 has a substantially U-shaped cross section. Furthermore, a fourth metal flange 77, a fifth metal flange 79, and a sixth metal flange 81 are provided at the outer peripheral portion of the upper end portion 75 of the front pillar 7. These first to sixth metal flanges are formed by inserting a steel plate into a fiber reinforced resin as described later.

  A dash side 83 is disposed on the vehicle interior side of the rear portion of the hood ridge 1, the body side front portion 15, and the lower portion 51 of the front pillar 7 described above. The dash side 83 is integrally configured by a planar side surface 85 extending in the vertical and longitudinal directions, and an extending flange 87 bent at the upper end of the side surface 85 and extending to the vehicle interior and a joining flange 89. . The side surface 85 of the dash side 83 is provided with two joint surfaces 91 and 93 extending in the vertical direction and an extending flange 94.

  The roof 5 is formed in a rectangular shape in a plan view as viewed from above, and a flange 27 is formed in a ring shape at the periphery of the roof main body 95.

  The roof side rail inner 101 is integrally formed of a rail main body 103 and a rail front end 105 disposed at the front end of the rail main body 103. Rail body 103 includes a longitudinal surface 107 extending in the longitudinal and longitudinal directions, an upper flange 109 bent at the upper end of longitudinal surface 107 and extending outward in the vehicle width direction, and a lower end of longitudinal surface 107 to vehicle width. And a lower flange 111 extending outward in the direction. The rail front end portion 105 includes a longitudinal surface 113 extending in the front and rear direction and the vertical direction, and a joint flange 115 bent at the upper end of the longitudinal surface 113 and extending outward in the vehicle width direction. Note that joint surfaces 117 and 119 are provided on the longitudinal surface 113 at the rail front end portion 105. These bonding surfaces 117 and 119 are formed in an L shape in side view.

Next, a method of assembling the components shown in FIG. 3 will be described with reference to FIG.
First, the rear end portion of the hood ridge 1 is joined to the upper end portion 17 of the body side front portion 15. Specifically, the rear end inclined portion 19 provided at the rear end portion of the upper surface 9 of the hood ridge 1 is joined onto the inclined surface 47 of the upper end portion 17 of the body side front portion 15. Further, the rear end portion of the side surface 11 of the hood ridge 1 is joined to the upper end portion of the side surface 31 of the body side front portion 15.

  Further, the upper end portion 17 of the body side front portion 15 is joined to the lower portion 51 of the front pillar 7. Specifically, the front joint flange 37 at the upper end 17 of the body side front portion 15 is welded to the front first metal flange 57 of the lower portion 51 of the front pillar 7. The rear joint flange 43 at the upper end portion 17 of the body side front portion 15 is welded to the rear second metal flange 63 at the lower portion 51 of the front pillar 7. Further, the joining flange 49 of the upper end portion 17 of the body side front portion 15 is joined by welding onto the third metal flange 67 in the lower portion 51 of the front pillar 7.

  Then, the lower portion 51 of the front pillar 7 is joined to the dash side 83. Specifically, the first metal flange 57 on the front side of the lower portion 51 of the front pillar 7 is welded to the joint surface 91 of the dash side 83. The rear second metal flange 63 in the lower portion 51 of the front pillar 7 is welded to the joint flange 93 of the dash side 83. Furthermore, the lower side 69 of the third metal flange 67 in the lower portion 51 of the front pillar 7 is welded on the joint flange 89 of the dash side 83. The upper portion 71 of the third metal flange 67 in the lower portion 51 of the front pillar 7 is joined by welding on the end portion of the cowl box 73 in the vehicle width direction, as shown in FIG.

  Then, the upper end portion 75 of the front pillar 7 is joined to the rail front end portion 105 of the roof side rail inner 101. Specifically, the fourth to fifth metal flanges at the upper end portion 75 of the front pillar 7 are joined to the joint surfaces 117 and 119 of the rail front end portion 105 by welding. Further, the sixth metal flange 81 at the upper end portion 75 of the front pillar 7 is welded on the flange 27 of the roof 5.

  Furthermore, the roof side rail inner 101 is joined to the roof 5. Specifically, the upper flange 109 and the joint flange 115 of the roof side rail inner 101 are joined to the lower side of the flange 27 of the roof 5.

  As shown in FIG. 2, the extending flange 87 of the dash side 83 and the third metal flange 67 of the lower portion 51 of the front pillar 7 are provided on the end in the vehicle width direction of the cowl box 73 extending in the vehicle width direction. The upper portions 71 are directly joined by welding.

Next, a cross-sectional structure taken along line A-A of FIG. 1 will be described with reference to FIG.
The front pillar 7 is made of a fiber reinforced resin 121. However, a plurality of metal flanges are coupled to the lower portion 51 and the upper end portion 75. Specifically, a first metal flange 57 and a second metal flange 63 are provided in the lower portion 51 of the front pillar 7 by insert-molding a steel plate into the fiber reinforced resin 121. The first metal flange 57 and the second metal flange 63 extend along the longitudinal direction of the vehicle, and are joined to the joint surface 91 and the joint flange 93 provided on the side surface 85 of the dash side 83. The lower portion 51 of the front pillar 7 has a closed cross-sectional shape having a hollow portion 123. Further, the cross-sectional shape of the upper end portion 17 of the body side front portion 15 is formed in a shape that matches the lower portion 51 of the front pillar 7. The joint flanges 37 and 43 of the upper end portion 17 of the body side front portion 15 are joined to the first metal flange 57 and the second metal flange 63 of the lower portion 51 of the front pillar 7. The rear end portion of the side surface 11 of the hood ridge 1 is joined to the side surface 31 of the upper end portion 17 of the body side front portion 15.

Hereinafter, the operation and effect according to the first embodiment will be described.
(1) The vehicle body front structure of the automobile according to the first embodiment includes a hood ridge 1 extending in the longitudinal direction of the vehicle, and a front pillar 7 extending upward from the vicinity of the rear end 13 of the hood ridge 1 And. The front pillar 7 is formed of fiber reinforced resin, and the lower portion 51 of the front pillar 7 is disposed close to the rear side of the rear end portion 13 of the hood ridge 1.

  Thus, the lower portion 51 of the front pillar 7 is disposed on the rear side of the rear end portion 13 of the hood ridge 1. Therefore, when a load directed to the rear of the vehicle is input to the hood ridge 1, the load is transmitted upward from the lower portion 51 of the front pillar 7 to the entire front pillar 7 via the body side front portion 15. Therefore, in the present embodiment, the load input to the front portion of the vehicle body can be efficiently transmitted to the front pillar 7. Since the upper end portion 75 of the front pillar 7 is joined to the flange 27 of the roof 5, the load transmitted to the front pillar 7 is transmitted to the roof 5. Further, the load is also transmitted from the body side front portion 15 to the body side sill portion 21.

(2) The lower portion 51 of the front pillar 7 is connected to the dash side 83, so the strength of the lower portion 51 of the front pillar 7 is improved, and the load input to the front of the vehicle body is more efficiently transmitted to the front pillar 7. It can be transmitted.

(3) The lower portion 51 of the front pillar 7 is connected to the cowl box 73 extending in the vehicle width direction, so the strength of the lower portion 51 of the front pillar 7 is improved and the load input to the front of the vehicle body It can be more efficiently transmitted to the pillars 7.

Second Embodiment
Next, although a second embodiment of the present invention will be described, parts having the same structure as the first embodiment will be assigned the same reference numerals and descriptions thereof will be omitted.

  In the first embodiment described above, the first to third metal flanges provided at the lower portion of the front pillar 7 are formed by insert-forming a steel plate into a fiber reinforced resin as described in FIG. 7.

  On the other hand, in the second embodiment, a metal flange is configured by connecting one steel plate 201 to the side surface of the lower portion of the front pillar 207 in the vehicle interior. As a joining method of the steel plate 201, mechanical fastening by bolts or rivets or joining by adhesion is applicable. Specifically, when viewed from the side of the vehicle among the steel plates, the metal flange is a front projection 203 projecting forward from the front wall 55 of the lower portion 51 of the front pillar 207 and a lower portion of the front pillar 207 And 51 a rear projection 205 projecting rearward from the rear extension flange 61. These metal flanges are joined to the side surface 85 of the dash side 83.

Hereinafter, the operation and effect according to the second embodiment will be described.
(1) In the second embodiment, a metal flange is configured by connecting one steel plate 201 to the side surface of the lower portion of the front pillar 207 in the vehicle interior. Therefore, the metal flange can be easily formed.

  In addition, this invention is not limited to embodiment mentioned above, A various change and modification are possible. For example, the hood ridge 1 is formed in an L shape in a front view, but may be formed in a rectangular shape of a closed cross section.

Reference Signs List 1 food ridge 7 front pillar 13 rear end 51 of the food ridge lower portion 73 of the front pillar crow box 83 dash side

Claims (3)

A hood ridge extending in the longitudinal direction of the vehicle;
A front pillar made of fiber reinforced resin extending upward from the vicinity of the rear end portion of the hood ridge;
The lower portion of the front pillar is a vehicle body front structure of an automobile disposed close to the rear side of the rear end of the hood ridge, wherein
The lower portion of the front pillar and the upper portion of the body side front extending in the vertical direction are joined such that a portion overlapping along the vehicle vertical direction is formed.
An automobile is characterized in that the entire rear end portion of the hood ridge is joined from the front side in the longitudinal direction of the vehicle to a portion where the lower portion of the front pillar overlaps the upper portion of the body side front Front body structure.   The vehicle body front structure of an automobile according to claim 1, wherein a lower portion of the front pillar is coupled to a dash side.   The vehicle body front structure of an automobile according to claim 1 or 2, wherein a lower portion of the front pillar is coupled to a cowl box extending in a vehicle width direction.