JP2019137089A - Vehicle front section structure - Google Patents

Abstract

To provide a vehicle front section structure which enables an adjustment of an assembly of a radiator support and that of a vehicle exterior member, and which is capable of accomplishing a weight reduction of a radiator support while maintaining an assembling precision.SOLUTION: An upper portion main body 20A that forms a radiator support upper, and a pair of side portions 20B are resin members formed integrally with each other. A side portion 20B is attached to a crash box 14 by a first fastening member that includes a bolt 32 which has a shaft portion 32B with a smaller outer diameter than an internal diameter of a clearance hole 14D. A lamp attachment bracket 40 or a bumper attachment bracket 50 to be joined with a vehicle body exterior member is directly or indirectly attached to an upper portion 20 by a second fastening member that includes bolts 42 and 52 which have respective shaft portions 42B and 52B smaller than respective internal diameters of clearance holes 40D and 50c and nuts 44 and 54.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle front structure including a pair of front side members, a pair of crash boxes, and a radiator support.

  Patent Document 1 includes a pair of front side members disposed on the left and right in the vehicle width direction, and a bumper reinforcement that extends in the vehicle width direction and is attached to a front end portion of the front side member via a crash box. A structure of a vehicle front portion including a pair of radiator support sides fixed to front ends of a pair of front side members, a radiator support upper, and a radiator support including a radiator support lower is described.

JP 2017-30541 A

  In the vehicle front structure as described in Patent Document 1, first, the radiator support and the vehicle body are aligned using a jig, and then the radiator support side and the front side member are fixed by welding. Thereby, even if the processing accuracy of the radiator support varies, the radiator support can be assembled at an appropriate position with respect to the position reference on the vehicle body side. Further, when the vehicle body exterior members such as the grille, the bumper cover, and the headlamp unit are assembled to the radiator support, these vehicle body exterior members are also assembled at appropriate positions with respect to the position reference on the vehicle body side.

  On the other hand, as a technique that contributes to reducing the mass of the vehicle front structure, a radiator support that is partially formed of resin is known. Fastening members such as bolts are used to fix the resin member and other members. In this case, if the position of the through hole of each member is shifted due to variations in processing accuracy, the radiator support and the vehicle body exterior It becomes difficult to assemble the member at an appropriate position. In order to adjust the assembly position of the radiator support in the welding process with the vehicle body side member as described above, it is necessary to use a metal member at the fixing portion with the vehicle body side member in order to maintain the assembly accuracy. There is. For this reason, there has been a problem that it is difficult to obtain an effect of mass reduction due to resination of the radiator support.

  The present invention has been made in view of the above-described problems, and can reduce the mass of the radiator support while maintaining the assembly accuracy by enabling the assembly adjustment of the radiator support and the vehicle body exterior member. It is an object to provide a partial structure.

  The vehicle front portion structure according to the present invention is disposed outside the vehicle width direction at the vehicle front portion, and is attached to a pair of front side members extending in the vehicle front-rear direction and a front end portion of the pair of front side members, respectively. A pair of crash boxes to which a bumper reinforcement extending in the vehicle width direction is attached to the upper part, an upper part body extending above the radiator body and extending in the vehicle width direction, and lower from both ends of the upper part body in the vehicle width direction And a radiator support upper composed of a pair of side portions extending in the direction. The upper portion main body and the pair of side portions are integrally formed resin members. The pair of side portions are respectively attached to the pair of crash boxes by the first fastening member, and the first fastening member has an outer diameter smaller than the inner diameter of the first through hole provided in the crash box, and has the first through hole. The 1st axial part which penetrates is included. A connecting member to be connected to the vehicle body exterior member is directly or indirectly attached to the radiator support upper by the second fastening member, and the second fastening member has an outer diameter smaller than the inner diameter of the second through hole provided in the connecting member. A second shaft portion having a diameter and penetrating the second through hole is included.

  A pair of side parts which are a part of a radiator support upper are attached to a crash box by the 1st fastening member containing the 1st axial part which has an outer diameter smaller than the internal diameter of the 1st through-hole provided in the crash box. Thereby, the relative position can be adjusted when the radiator support upper and the crash box are assembled.

  The vehicle body exterior member is directly or indirectly attached to the radiator support by a second fastening member having a second shaft portion that is smaller than the inner diameter of the second through hole provided in the connecting member that is coupled to the vehicle body exterior member. . Thereby, the relative position can be adjusted when the vehicle body exterior member and the radiator support upper are assembled.

  Therefore, even if the radiator support upper is a resin member in which the upper portion main body and the pair of left and right side portions are integrally formed, the first fastening member and the second fastening member can be used to adjust the assembly position of the radiator support upper and the vehicle body exterior member. This makes it possible to easily perform the assembly, and the assembly accuracy of the radiator support upper and the vehicle body exterior member can be maintained.

  In a preferred embodiment, the vehicle body exterior member includes a head lamp unit, and a lamp mounting bracket connected to the head lamp unit is directly attached to the side portion. In another preferred embodiment, the vehicle body exterior member includes a front bumper unit, and a pair of bumper mounting brackets connected to the front bumper unit are indirectly mounted at a center in the vehicle width direction of the radiator support upper.

  The upper portion main body and the pair of side portions constituting the radiator support upper are formed as an integrally formed resin member, and the pair of side portions has an outer diameter smaller than the inner diameter of the first through hole provided in the crash box. Each of the first fastening members including the one shaft portion is attached to the pair of crash boxes, and the vehicle body exterior member has a second shaft portion smaller than the inner diameter of the second through hole provided in the connecting member connected to the vehicle body exterior member. By directly or indirectly attaching to the radiator support by the second fastening member, gaps are generated between the first through hole and the first shaft portion, and between the second through hole and the second shaft portion, respectively. Therefore, it is possible to reduce the mass of the radiator support while maintaining the assembly accuracy by enabling the assembly adjustment of the radiator support and the vehicle body exterior member.

It is a perspective view showing composition of a vehicle front part structure concerning an example of an embodiment. It is a perspective view showing a part of composition of vehicles front part structure concerning an example of an embodiment. It is a figure which shows a 1st fastening member and schematic structure of the circumference | surroundings. It is a figure which shows a 2nd fastening member and schematic structure of the circumference | surroundings. It is a figure which shows a 2nd fastening member and schematic structure of the circumference | surroundings.

  Hereinafter, a vehicle front structure according to an embodiment of the present invention will be described with reference to the drawings.

  1 and 2 are perspective views showing a configuration of a vehicle front structure according to the present embodiment. FIG. 3 is a view showing a schematic configuration of the first fastening member and its surroundings according to the present embodiment. 4 and 5 are diagrams showing a schematic configuration of the second fastening member and its surroundings according to the present embodiment. In addition, the direction of the arrow RH shown in each drawing is the right side of the vehicle, the direction of the arrow UP is the upper side of the vehicle, and the direction of the arrow FR is the front side of the vehicle. In the following description, unless otherwise specified, terms indicating directions and directions such as front and rear, left and right, and up and down indicate directions and directions related to the vehicle. The phrases “outside” and “inside” indicate the outside and the inside, respectively, with respect to the center in the width direction of the vehicle.

  As shown in FIG. 1, the vehicle front structure 10 includes a pair of front side members 12 extending in the vehicle front-rear direction, a pair of crash boxes 14, and bumper reinforcement (hereinafter referred to as “bumper R / R” extending in the vehicle width direction. F ") 18 and a radiator support upper (hereinafter referred to as" upper part ") 20 disposed above the radiator.

  As shown in FIG. 1, the front side member 12 is arranged outside the vehicle and extends along the front-rear direction. The front side member 12 is a vehicle skeleton member having a substantially rectangular cross section.

  At the front end of the front side member 12, a crash box 14 as an impact absorbing member is provided. The crash box 14 includes a main body 14A that is a cylindrical member that extends in the vehicle front-rear direction, and a rear end plate 14B that covers the rear end of the main body 14A. The main body 14A of the crash box 14 absorbs collision energy by compressing and deforming in the axial direction when a collision load is input. The rear end plate 14B is fastened by a flange plate 13 provided at the front end of the front side member 12 and a bolt (not shown), whereby the front side member 12 and the crash box 14 are fixed. As shown in FIG. 1, the upper portion of the rear end plate 14B has a shape extending inward in the vehicle width direction, and an attachment surface 14C to the upper portion 20 is formed at the inner end portion. Note that the means for fixing the rear end plate 14B to the flange plate provided at the front end of the front side member 12 is not limited to bolts, and may be welding, for example.

  A bumper R / F 18 extending in the vehicle width direction is disposed in front of the vehicle front structure 10 and at the front end of the crash box 14. The bumper R / F 18 is a metal bumper skeleton member, and spans the front end portions of the pair of left and right crash boxes 14. The bumper R / F 18 has a curved shape such that the center portion in the vehicle width direction protrudes further toward the vehicle front side than both ends in the vehicle width direction.

  The vehicle front structure 10 is provided with a radiator support that supports a radiator (not shown). The radiator support includes an upper portion 20 that supports the upper portion of the radiator, and a radiator support lower (hereinafter referred to as “lower portion”) 22 that supports the lower portion of the radiator. As shown in FIG. 1, the upper portion 20 and the lower portion 22 are arranged separately (separately and independently) and are not directly connected.

  The upper portion 20 of the radiator support is disposed above the radiator, and includes an upper portion main body 20A extending in the vehicle width direction, and a pair of left and right side portions 20B extending downward from both ends of the upper portion main body 20A in the vehicle width direction. Consists of. In the present embodiment, the upper portion 20 is made of a resin member in which an upper portion main body 20A and a pair of side portions 20B are integrally formed.

  The lower end portion of the side portion 20B is fastened to the mounting surface 14C of the crash box 14 by a first fastening member including a bolt 32 and a nut 34 (see FIG. 3). Thereby, the upper part 20 is attached to a vehicle (front side member 12). A lamp mounting bracket 40 (connecting member) that is connected to a headlamp unit (not shown) is second fastened by a bolt 42 and a nut 44 (see FIG. 4) from the center to the top of the side portion 20B in the vehicle width direction. It is attached by a member. FIG. 2 shows an example of a more specific configuration of the side portion 20B and the lamp mounting bracket 40. The structure of the lamp mounting bracket 40 will be described later. As shown in FIG. 1, a pair of left and right bumper mounting brackets 50 (connecting members) connected to a front bumper unit (not shown) are provided at the center of the upper body 20A in the vehicle width direction. The second fastening members (see FIG. 5) are attached at intervals in the vehicle width direction. The headlamp unit and the front bumper unit are examples of vehicle body exterior parts. The shapes of the upper portion main body 20A and the side portion 20B are not limited to the shapes of the present embodiment, and can be changed.

  As shown in FIG. 1, the lower portion 22 of the radiator support is a metal member that is disposed below the radiator, extends in the vehicle width direction, and has a substantially rectangular cross section. Both end portions of the lower portion 22 in the vehicle width direction are respectively connected to the lower end portions of the side surface portions 24B that are part of the pair of side wall portions 24. The side wall portion 24 extends upward from both ends of the lower portion 22 in the vehicle width direction, the upper portion is fixed to the lower portion of the flange plate 13 provided at the front end of the front side member 12, and the upper end portion is the rear end of the crash box 14. It is fixed to the lower end of the plate 14B. The pair of left and right side wall portions 24 are made of a metal plate such as a steel plate, are formed symmetrically on both sides in the vehicle width direction, and include a rear surface portion 24A facing substantially in the front-rear direction and a side surface portion 24B facing substantially in the vehicle width direction. Has been. In the rear surface portion 24A, the upper end portion of the main surface facing the front-rear direction is fixed to the rear end plate 14B by spot welding. The rear surface portion 24A is bent at least at the lower portion of the right end portion toward the front, and is fastened to the side surface portion 24B by a fastener F including a bolt and a nut at the bent portion. The side surface portion 24B has a substantially right triangle shape and is fastened to the rear surface portion 24A by the fastener F. The lower end portion of the side surface portion 24B is bent toward the center in the vehicle width direction, and is fastened by a fastener F made up of the upper surface of the lower portion 22 and bolts and nuts.

  Hereinafter, a fastening structure of each member using the first fastening member and the second fastening member in the vehicle front structure 10 according to the present embodiment will be described. In the following description, only the right side structure is described for the structures at the left and right ends in the vehicle width direction, and the left side structure is configured in the same manner as the right side structure, and thus the description thereof is omitted. .

  FIG. 3 is a cross-sectional view showing a fastening structure between the side portion 20B of the upper portion 20 and the crash box 14 according to the present embodiment. As shown in FIG. 3, circular relief holes 14 </ b> D (first through holes) are formed in two upper and lower portions on the attachment surface 14 </ b> C of the crash box 14 to the upper portion 20 (side portion 20 </ b> B). An insertion hole 20C is formed at the lower end of the side portion 20B at a position corresponding to the escape hole 14D. In the present embodiment, a bolt 32 that penetrates the escape hole 14D and the insertion hole 20C and a nut 34 that is screwed to the bolt 32 are used as the first fastening member that fastens the attachment surface 14C and the side portion 20B. The bolt 32 includes a head portion 32A and a shaft portion 32B (first shaft portion) having a screw portion at the other end opposite to the side on which the head portion 32A is provided. The outer diameter of the shaft portion 32B is smaller than the inner diameter of the escape hole 14D. The inner diameter of the escape hole 14D is, for example, 11.5 mm, while the outer diameter of the shaft portion 32B is, for example, 6 mm. A large-diameter portion 32C having an outer diameter larger than the inner diameter of the escape hole 14D is formed at the end portion of the head portion 32A of the bolt 32 on the shaft portion 32B side. The nut 34 is formed of a cylindrical body having a flange portion at one end, and the nut 34 is inserted into the insertion hole 20C from the outer side in the vehicle width direction, and is pressed and swaged in the axial direction from the inner side in the vehicle width direction. It is fixed to the part 20B. The nut 34 is not limited to such a caulking die, and may be inserted during resin molding, or may be fixed by being press-fitted into the insertion hole 20C.

  As described above, in the present embodiment, the mounting surface 14C and the side portion 20B are used by using the first fastening member including the bolt 32 having a small outer diameter of the shaft portion 32B with respect to the relief hole 14D provided on the mounting surface 14C. Is concluded. Thereby, when assembling the upper part 20 to the crash box 14, the relative position between the upper part 20 and the vehicle (front side member 12) side can be adjusted. More specifically, when the upper part 20 is assembled, the position of both is determined based on the position reference provided on the upper part 20 and the position reference provided on the rear end plate 14B of the crash box 14 using an attachment jig. Align. At this time, even if a deviation occurs between the position of the escape hole 14D and the position of the insertion hole 20C, the escape hole 14D has a large diameter with respect to the shaft portion 32B of the bolt 32. It can fasten using one fastening member. Therefore, for example, even when the processing accuracy of the upper portion 20 varies, fine adjustment of the relative positions of the upper portion 20 and the crash box 14 in the front-rear direction and the vertical direction is performed, and both are set at appropriate positions. It can fasten using the 1st fastening member. As a result, the upper part 20 can be assembled at an appropriate position with respect to the vehicle-side position reference, and the component mounting accuracy can be increased.

  The head 32A of the bolt 32 constituting the first fastening member is provided with a large-diameter portion 32C having an outer diameter larger than the inner diameter of the escape hole 14D at least at the end portion on the shaft portion 32B side. Thus, even if the shaft portion 32B and the center axis of the escape hole 14D do not coincide with each other, the surface on the side portion 20B side of the large diameter portion 32C is in surface contact with the side portion 20B, and thus includes the bolt 32 and the nut 34. The crash box 14 and the side portion 20B are fastened by the first fastening member.

  In the vehicle front structure 10 according to the present embodiment, as shown in FIG. 1, a lamp mounting bracket that is connected to a headlamp unit (not shown) that is an example of a vehicle body exterior part outside the side portion 20B of the upper portion 20. 40 (connection member) is attached. FIG. 4 is a view showing a cross section of a fastening structure between the side portion 20B of the upper portion 20 and the lamp mounting bracket 40 according to the present embodiment. As shown in FIG. 4, the lamp mounting bracket 40 is fastened to the side portion 20 </ b> B by a second fastening member including a bolt 42 and a nut 44.

  As shown in FIGS. 1 and 2, the lamp mounting bracket 40 includes a fixing portion 40A that is in contact with the outer side surface of the side portion 20B, and a lamp mounting portion 40B that mounts the headlamp unit. The fixing portion 40A of the lamp mounting bracket 40 includes a side surface formed so as to be overlapped with the outer side surface of the side portion 20B in a surface contact state, and an upper surface portion extending inward in the vehicle width direction from the upper end edge of the side surface portion. And a front surface portion extending inward in the vehicle width direction from the front end edge of the upper end portion of the side surface portion. Circular escape holes 40D (second through holes) are formed at two locations, the upper portion and the lower portion of the side surface portion of the fixing portion 40A. The upper surface portion of the fixing portion 40A has a substantially rectangular shape, and a rubber attachment hole 40C for attaching a cushion rubber for supporting the front hood is provided at the rear portion of the upper surface portion. The lamp mounting portion 40B has an L-shape when viewed from the side, is in contact with the front end portion of the upper surface portion of the fixing portion 40A, and has an upper surface portion formed with mounting holes 40E for mounting members constituting the headlight unit. And a front surface portion that contacts the front surface portion of the fixed portion 40A. Each of the fixing portion 40A and the lamp mounting portion 40B is formed, for example, by bending a single steel plate. Further, the fixed portion 40A and the lamp mounting portion 40B are fixed by spot welding at a total of three locations, one at each upper surface and two at the front. The headlamp unit is a vehicle body exterior member disposed in the front part of the vehicle, and includes, for example, a lamp body made of LEDs, a lamp housing that holds the lamp body, a lens that diffuses light from the lamp body, and the like.

  As shown in FIG. 4, an insertion hole 20D is formed in the side portion 20B at a position corresponding to the escape hole 40D provided in the fixing portion 40A. In the present embodiment, a bolt 42 that penetrates the escape hole 40D and the insertion hole 20D and a nut 44 that is screwed into the bolt 42 are used as the second fastening member that fastens the fixing portion 40A and the side portion 20B. The bolt 42 includes a head portion 42A and a shaft portion 42B (second shaft portion) having a screw portion at the other end opposite to the side on which the head portion 42A is provided. The outer diameter of the shaft portion 42B is smaller than the inner diameter of the escape hole 40D. The inner diameter of the escape hole 40D is, for example, 11.5 mm, while the outer diameter of the shaft portion 42B is, for example, 6 mm. Further, a large-diameter portion 42C having an outer diameter larger than the inner diameter of the escape hole 40D is formed at the end portion of the head portion 42A of the bolt 42 on the shaft portion 42B side. The function and the like of the large-diameter portion 42C provided on the head portion 42A of the bolt 42 are the same as those of the large-diameter portion 32C provided on the head portion 32A of the bolt 32 described above, and thus description thereof is omitted. The nut 44 is formed of a cylindrical body having a flange portion at one end, and the nut 44 is inserted into the insertion hole 20D from the outside in the vehicle width direction, and is pressed in the axial direction from the inside in the vehicle width direction to be swaged. The nut 44 is fixed to the side portion 20B.

  As described above, in the present embodiment, the fixing portion of the lamp mounting bracket 40 is used by using the second fastening member constituted by the bolt 42 whose outer diameter of the shaft portion 42B is smaller than the relief hole 40D provided in the fixing portion 40A. 40A and the side part 20B of the upper part 20 are fastened. Thereby, when attaching a headlamp unit to the upper part 20 similarly to the case where the crash box 14 and the side part 20B are fastened by the 1st fastening member, both relative position can be adjusted easily. Therefore, for example, even when the processing accuracy of the upper portion 20 varies, the relative positions of the upper portion 20 and the lamp mounting bracket 40 in the front-rear direction and the vertical direction are finely adjusted, and both are set at appropriate positions. The second fastening member can be used for fastening. As a result, the headlamp unit is assembled at an appropriate position with respect to the position reference on the upper portion 20 and the vehicle side.

  In the vehicle front structure 10 according to the present embodiment, as shown in FIG. 1, a bumper attachment connected to a front bumper unit (not shown) which is an example of a vehicle body exterior part is provided at the center of the upper body 20A in the vehicle width direction. A bracket 50 (connection member) is attached. FIG. 5 is a cross-sectional view showing a fastening structure between the upper portion main body 20A of the upper portion 20 and the bumper mounting bracket 50 according to the present embodiment. As shown in FIGS. 1 and 5, the bumper mounting bracket 50 is fastened to the intermediate bracket 56 by a second fastening member including a bolt 52 and a nut 54, and the intermediate bracket 56 is attached to the upper body 20 </ b> A via a brace 60. It is attached.

  The bumper mounting bracket 50 has an L-shape when viewed from the front, and includes a fixing portion 50A that is fixed in a surface contact state with the side surface portion 56B of the intermediate bracket 56, and a bumper mounting portion 50B to which the front bumper unit is mounted. It consists of and. The fixed portion 50A is formed in a flat plate shape and faces in the vehicle width direction, and the fixed portion 50A is provided with circular relief holes 50C (second through holes) at two locations on the upper and lower sides. The bumper mounting portion 50B extends outward from the upper end of the fixed portion 50A, and is provided with mounting holes for mounting the front bumper unit with bolts or clips, for example. The bumper mounting bracket 50 is formed, for example, by bending a single steel plate.

  The front bumper unit connected to the bumper mounting bracket 50 includes, for example, a bumper cover that covers the front end of the vehicle, and a front grill that guides air outside the vehicle to a power unit chamber provided in the vehicle front structure. Configure the surface. The front grille is a member that is long in the width direction of the vehicle and has a plurality of openings. For example, the mounting member included in the front bumper unit is fixed to the bumper mounting portion 50B of the bumper mounting bracket 50 with a bolt or a clip.

  The intermediate bracket 56 has a substantially L-shaped shape with rounded corners when viewed from the front, a lower surface portion 56A fixed to the upper surface of the brace 60 attached to the upper portion main body 20A, and a bumper mounting bracket. 50 fixed portions 50A and a side surface portion 56B fixed in a surface contact state. The lower surface portion 56A of the intermediate bracket 56 is fixed to the brace 60 by spot welding, for example. As shown in FIG. 5, an insertion hole 56C is formed in the side surface part 56B at a position corresponding to the escape hole 50C provided in the fixing part 50A. As shown in FIG. 5, the bolt 52 is inserted into the insertion hole 56C of the side surface portion 56B and the escape hole 50C of the fixing portion 50A from the inner side in the vehicle width direction, and the nut 54 has an outer diameter larger than the inner diameter of the escape hole 50C. Thus, the fixing portion 50A is fixed from the outside in the vehicle width direction. The lower surface portion 56A and the side surface portion 56B of the intermediate bracket 56 are formed, for example, by bending a single steel plate.

  The brace 60 is made of a metal member such as a steel plate, and is a member that connects the upper portion main body 20A of the radiator support, the bumper R / F 18 and a hood lock (not shown). The brace 60 is fixed to the upper portion main body 20A and the hood lock at an attachment point 60A at the upper end, is fixed to the front end of the lower portion of the upper portion main body 20A at the attachment point 60B at the center, and is attached to the lower end. At the bumper R / F18. Further, the brace 60 is fixed at each attachment point 60A, 60B, 60C by a fastener made up of each member, bolts and nuts.

  The pair of braces 60 are arranged symmetrically with respect to the center of the vehicle in the vehicle width direction, and are arranged in parallel to each other when viewed from the front. In the pair of braces 60, the attachment points 60A, 60B, 60C are arranged at equal distances with respect to the center of the vehicle in the vehicle width direction. When each brace 60 is connected to the hood lock, the bumper R / F 18 and the upper portion 20, a load applied to the upper portion 20, for example, a load applied via the hood lock when the front hood is closed, or an obstacle is passed over. A load or the like applied through the radiator when an impact is sometimes applied to the lower portion can be appropriately distributed to the bumper R / F 18 through the brace 60. As a result, the load on the upper portion 20 that is a resin member is reduced. Further, by connecting the front hood and the bumper R / F 18 via the hood lock and brace 60, the movement of the front hood to the rear when an impact is applied from the front of the vehicle can be restricted. Note that the pair of braces 60 may be arranged in a C shape in a front view, or may be arranged in an inverted C shape.

  In the vehicle front structure 10 according to the present embodiment, the bolt 52 that penetrates the relief hole 50C and the insertion hole 56C as a second fastening member that fastens the fixing portion 50A of the bumper mounting bracket 50 and the side surface portion 56B of the intermediate bracket 56. And a nut 54 that is screwed into the bolt 52. The bolt 52 includes a head portion 52A and a shaft portion 52B (second shaft portion) having a screw portion at the other end opposite to the side on which the head portion 52A is provided. The outer diameter of the shaft portion 52B is smaller than the inner diameter of the escape hole 50C. The inner diameter of the escape hole 50C is, for example, 11.5 mm, while the outer diameter of the shaft portion 52B is, for example, 6 mm. Further, the nut 54 that is screwed into the shaft portion 52B and is adjacent to the escape hole 50C has an outer diameter larger than the inner diameter of the escape hole 50C. The function of the nut 54 having an outer diameter larger than the inner diameter of the escape hole 50C is the same as that of the large-diameter portion 32C provided on the head portion 32A of the bolt 32 described above, and thus the description thereof is omitted.

  As described above, in the present embodiment, the bumper mounting bracket 50 and the intermediate bracket are used by using the second fastening member configured by the bolt 52 having the outer diameter of the shaft portion 52B smaller than the escape hole 50C provided in the fixing portion 50A. 56 is fastened. As a result, the bumper mounting bracket 50 and the front bumper unit connected thereto are indirectly mounted on the upper portion 20. Therefore, when attaching the front bumper unit to the upper part 20 as in the case where the crash box 14 and the side part 20B are fastened by the first fastening member, the relative positions of both can be easily adjusted. Therefore, for example, even when the processing accuracy of the upper portion 20 varies, the relative positions of the upper portion 20 and the bumper mounting bracket 50 in the front-rear direction and the vertical direction are finely adjusted, and both are set at appropriate positions. Thus, the second fastening member can be used for fastening. As a result, the front bumper unit is assembled at an appropriate position with respect to the upper portion 20 and the vehicle-side position reference.

  In the vehicle front structure 10 of the present embodiment, a relief hole having an inner diameter larger than the outer diameter of the shaft portion of the bolt to be inserted is provided in the bumper R / F 18 at the attachment point 60C between the brace 60 and the bumper R / F 18. ing. Accordingly, when the brace 60 is attached to the bumper R / F 18, even if the positions of the upper portion 20 and the bumper R / F 18 are shifted, the relative positions of the upper and lower directions and the left and right directions are set to appropriate positions. Adjustment can be performed easily. As a result, it is possible to maintain the assembly accuracy between the upper portion 20 and the bumper R / F 18 and prevent a situation in which the installation of other members is hindered.

  As described above, in the vehicle front structure 10 according to the present embodiment, the side portion 20B that is a part of the upper portion 20 has a shaft portion that has an outer diameter smaller than the inner diameter of the escape hole 14D provided in the crash box 14. It is attached to the crash box 14 by a first fastening member that includes a bolt 32 having 32B. Thereby, the relative position of both members at the time of assembling the upper part 20 and the crash box 14 can be adjusted, and the upper part 20 can be assembled at an appropriate position with respect to the position reference on the vehicle side.

  Further, in the vehicle front structure 10 according to the present embodiment, the lamp mounting bracket 40 that is connected to the headlamp unit that is an example of the vehicle body exterior member is a shaft portion that is smaller than the inner diameter of the relief hole 40D provided in the lamp mounting bracket 40. The second fastening member including the bolt 42 having 42 </ b> B is directly attached to the side portion 20 </ b> B that is a part of the upper portion 20. This makes it possible to adjust the relative position of the headlamp unit and the upper portion 20 when the headlamp unit is assembled, and assemble the headlamp unit at an appropriate position with respect to the position reference on the upper portion 20 and the vehicle side. Can do.

  Furthermore, in the vehicle front structure 10 according to the present embodiment, the bumper mounting bracket 50 connected to the front bumper unit which is an example of the vehicle body exterior member is a shaft portion smaller than the inner diameter of the relief hole 50C provided in the bumper mounting bracket 50. The second fastening member including the bolt 52 having 52B is attached to the upper part main body 20A which is a part of the upper part 20 via the intermediate bracket 56 and the brace 60. As a result, the relative position of the front bumper unit relative to the upper portion 20 of the front bumper unit can be adjusted when the front bumper unit is assembled, and the front bumper unit is assembled at an appropriate position with respect to the position reference on the upper portion 20 and the vehicle side. Can do.

  Therefore, even if the upper portion 20 is a resin member in which the upper portion main body 20A and the pair of left and right side portions 20B are integrally formed, the adjustment of the assembly position of the upper portion 20 and the vehicle body exterior member can be performed by adjusting the first fastening member and the first fastening member. 2 It becomes possible to perform easily using a fastening member, and the assembly | attachment precision of the upper part 20 and a vehicle body exterior member can be maintained. Therefore, it is possible to reduce the mass of the radiator support while enabling assembly adjustment of the radiator support and the vehicle body exterior member and maintaining the assembly accuracy.

  The configuration described above is an example, and the upper portion main body 20A and the pair of side portions 20B, which are a part of the upper portion 20, are formed as an integrally molded resin member, and the side portion 20B is a crash box by the first fastening member. 14 and the connecting member that connects to the vehicle body exterior member such as the lamp mounting bracket 40 or the bumper mounting bracket 50 can be directly or indirectly attached to the upper portion 20 by the second fastening member. May be changed as appropriate.

  In the above description, the bumper mounting bracket 50 is fastened to the intermediate bracket 56 by the second fastening member, and the intermediate bracket 56 is attached to the upper portion 20 via the brace 60, so that the bumper mounting bracket 50 is indirectly connected to the upper portion. 20 is attached. However, the bumper mounting bracket 50 may be directly fastened to the upper portion 20 by the second fastening member, and the intermediate bracket 56 may be directly attached to the upper portion 20 without the brace 60 being interposed. In the above description, a pair of left and right bumper mounting brackets 50, an intermediate bracket 56 and a brace 60 are provided in the center of the upper end of the upper portion 20 in the width direction of the vehicle. One bracket 56 and one brace 60 may be provided at arbitrary positions in the vehicle width direction.

  In the above description, fastening members composed of bolts and nuts are used as the first fastening member and the second fastening member. However, the first fastening member and the second fastening member are limited as long as they are fastening members having shaft portions. For example, a known fastening member such as a machine screw (screw) or a rivet may be used. In the above description, the first fastening member and the second fastening member have been described using the bolts having a large-diameter portion on the side of the head relief hole. However, instead of using such bolts, the relief is used. A fastening structure in which a washer having an outer diameter larger than the inner diameter of the hole is sandwiched between the bolt head and the relief hole and the bolt is fastened may be employed.

  In the above description, as the fixing means other than the position to be fixed using the first fastening member and the second fastening member, the fixing means such as the fastener F constituted by a bolt and a nut or spot welding is exemplified. However, about such a location, what is necessary is just to fix between members by a well-known fixing means, for example, you may use a screw, a rivet, a clip, etc. other than said fastener and spot welding.

  DESCRIPTION OF SYMBOLS 10 Vehicle front structure, 12 Front side member, 14 Crash box, 14A main body, 14B Rear end plate, 14C Mounting surface, 14D Relief hole (1st through hole), 18 Bumper R / F (bumper reinforcement), 20 upper part (radiator support upper), 20A upper part body, 20B side part, 20C, 20D, 56C insertion hole, 22 lower part, 24 side wall part, 24A rear surface part, 24B, 56B side part, 32 bolt (first fastening) Member), 32A, 42A, 52A head, 32B shaft portion (first shaft portion), 32C, 42C, 52C large diameter portion, 34 nut (first fastening member), 40 lamp mounting bracket (connecting member), 40A, 50A fixing part, 40B lamp mounting part, 40C rubber mounting hole, 40D, 50C relief hole (second through hole), 40E Mounting hole, 42, 52 bolt (second fastening member), 42B, 52B shaft portion (second shaft portion), 44, 54 nut (second fastening member), 50 bumper mounting bracket (connecting member), 50B bumper mounting portion , 56 Intermediate bracket, 56A Lower surface part, 60 brace, 60A, 60B, 60C Attachment point, F fastener.

Claims (1)

A pair of front side members disposed outside the vehicle width direction at the front of the vehicle and extending in the vehicle front-rear direction;
A pair of crash boxes attached to the front end portions of the pair of front side members, and a bumper reinforcement attached to the front end portion extending in the vehicle width direction; and
An upper portion main body disposed above the radiator main body and extending in the vehicle width direction; and a radiator support upper composed of a pair of side portions extending downward from both ends of the upper portion main body in the vehicle width direction,
The upper part body and the pair of side parts are integrally formed resin members,
The pair of side parts are respectively attached to the pair of crash boxes by a first fastening member,
The first fastening member has an outer diameter smaller than an inner diameter of a first through hole provided in the crash box, and includes a first shaft portion that penetrates the first through hole,
A connecting member connected to the vehicle body exterior member is directly or indirectly attached to the radiator support upper by the second fastening member,
The second fastening member has an outer diameter smaller than an inner diameter of a second through hole provided in the connecting member, and includes a second shaft portion that penetrates the second through hole.
Vehicle front structure.

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