Brevet FR3095796A1 — publié le 20201113

Description Title of Invention: VEHICLE FRONT STRUCTURE Technical Field [0001] The present invention relates to a vehicle front structure Background Art [0002] There exists a conventional vehicle front structure in which a fender bracket is fixed to a vehicle body part (cowl skie member) of a vehicle front and a fender panel is attached to the fender bracket (sec, for example. JP 2014-189261 A). The fender bracket in the vehicle front structure includes a bracket main body havine a top edge portion, a front vertical edge portion, a rcar vertical edge portion, and bent portions formcd at intermediate portions of the front vertical edge portion and the rear vertical edge portion, is configured to facilitatc control of shock absorbing charactcristics by fixing a rcar flange at a lowcr end portion of the rcar vertical edge portion to an upper wall surface of the vehicle body part, and fixing a front flange of the lower end portion of the front vertical edge portion to the front wall surface of the vehicle body part. [0003] However, in the conventional vehicle front structure described abovc, in order to fix the tender bracket to the vehicle body part, it is necessary to fix the rcar flange of the rcar vertical edge portion to the upper wall surface of the vehicle body part and fix the front flange of the front vertical edge portion to the front wall surface of the vehicle body part, and thus, there is a problem that the position of the fonder bracket cannot be adjustcd by moving in ail directions, that is, in a vehicle front-rcar direction, a vehicle width direction, and vehicle vertical direction relative to the N'aide body part. Therefore, in the conventional vehicle front structure, it k difficult to improvc the positional accuracy and asscmbling workability of the tender bracket, and there is room for improvement in pedestrian protection and in break line formation of the tender panel. [0004] In vicw of such circumstanccs, it is an object of the present invention to providc a vehicle front structure capable of sccuring pedestrian protection, improving positional accuracy and asscmbling workability of a fender brackct, and improving appearance quality by forming a break une on a fender panel, by configuring the tender bracket to include a lower bracket and an upper bracket having a lower rigidity than the lower bracket to allow positional adjustment in ail directions including a vehicle front-rear direction, a vehicle width direction, and a vehicle vertical direction. Summary 100051 In order to solve the problems of the related art, the present invention provides a vehicle front structure including a fender bracket fixed to a vehicle body part of a 2 vehicle front, and a fonder panel attached to the fonder bracket, in which the fonder bracket includos a lower ['racket fixed at a lower portion thcreof to the vehicle body part and an upper bracket fixed at an upper portion thorcof to fonder panel, the lower bracket includos a front-roar extending surface extending in a vehicle vertical direction and a vehicle front-roar direction and facing a vehicle width direction, a widthwisc extending surface extending in the vehicle vertical direction and the vehicle width direction and facing the vehicle front-mar direction, and a top surface extending continuously from an upper end of the front-mar extending surface and an upper end of the widthwisc extending surface in the vehicle width direction and the vehicle front-mar direction respoctivoly, and the upper bracket is configured to have a lower rigidity than the lower bracket, and a lower portion of the upper bracket is fixed to the top surface of the lower bracket. [0006] As dcscribcd above, the vehicle front structure according to the pi-osent invention has a structure including the fonder bracket fixed to the vehicle body part of the N'aide front, and the fonder panel attached to the fonder bracket, the fonder bracket includcs a levier bracket fixed at a lower portion thcroof to the vehicle body part and an upper bracket fixed at an upper portion thercof to the fonder panel, the lower bracket includos a front-mar extending surface extending in a vehicle vertical direction and a vehicle front-mar direction and facing the vehicle width direction, a widthwisc extending surface extending in the vehicle vertical direction and the vehicle width direction and facing the vehicle front-rear direction, and a top surface extending continuously from an upper end of the front-rear extending surface and an upper end of the widthwise extending surface in the vehicle width direction and the vehicle front-rear direction respectively, and the upper bracket is configured to have a lower rigidity than the lower bracket, and a lower portion of the upper bracket is fixed to the top surface of the lower bracket. [0007] In other words, in the vehicle front structure of the present invention, since the fender bracket includes the lower bracket and the upper bracket having a lower rigidity than the lower bracket, and the tender bracket is configured so as to be adjustable in position in ail directions such as the vehicle vertical direction, the vehicle width direction and the vehicle front-rear direction relative to the vehicle body part, the upper bracket is disposed within a clearance required for the pedestrian protection and the lower bracket is disposed out of the clearance required for the pedestrian protection, thereby securing the protection of the pedestrians with respect to the vehicle front. Moreover, in the vehicle front structure of the present invention, it is possible to improve the positional accuracy and assembling workability of the tender bracket, so that a break une of the tender panel can be fonned, and the appearance quality of the vehicle front can be improved. 3 100081 The following features, can be optionally implemented, separately or in combination one with the others: - the upper bracket is formed into a plate shape having a surface including an intermediate portion in the vehicle vertical direction facing the vehicle width direction, and includes a first vertical wall portion extending upward of the vehicle from the lower fixing portion, a first inclined wall portion extending upward of the vehicle from an upper end of the first vertical wall portion toward a vehicle inner sicle, and a second vertical wall portion extending upward of the vehicle from the upper end of the first inclined wall portion; - the second vertical wall portion is formed in an inclined surface shape; - the upper bracket includes a head lamp fixing portion at a front portion on a vehicle front sicle, and a fragile portion disposed to extend across the first inclined wall portion and the second vertical wall portion below the head lamp fixing portion; - the lower portion includes a front lower fixing portion and a rear lower fixing portion, and the front lower fixing portion and the rcar lower fixing portion arc fixcd to planes at diffcrent hcights; - a joining strcngth of the front lower fixing portion is set to be higher than a joining strength of the rcar lower fixing portion; - the front lower fixing portion and the rcar lower fixing portion arc formcd to have surfaces parallel to cach othcr in sicle vicw of the vehicle, whilc part of the vehicle body part overlapping with the fender bracket is formed into an inclined shape in which a vehicle rcar sicle is highcr than the vehicle front sidc; - a hood cushion stay is fixcd to an upper portion of the upper bracket in the intermediate portion in the vehicle vertical direction, which is an upper portion of the center portion in the vehicle front-rcar direction, and openings arc provided at front and rcar portions of the upper brackct in the intermediate portion in the vehicle vertical direction with the hood cushion stay interposed therebetween; - the lower fixing portion of the upper bracket is provided at a position overlapping with the front-rcar extending surface in the vehicle width direction in plan vicw of the vehicle, and is provided at a position overlapping with the widthwisc extending surface in the vehicle front-rcar direction. Brief Description of Drawings [0009] Other features, details and advantages will be shown in the following detailed de- scription and on the figures, on which: Fig. 1 [0010] [fig.1] is a perspective view of a left side of a vehicle front having a structure according to an embodiment of the present invention as viewed obliquely from above in front of a vehicle body.. Fig. 2 100111 Ifie.21 is a side view of a fender bracket and a periphery thereof applied to the structure according to the embodiment of the invention is applied as viewed from a vehicle inner Fig. 3 [0012] [fie.31 is a perspective view of the fender bracket in Figure 2 and the periphery thereof as viewed obliquely from above the front side of the vehicle body. Fig. 4 [0013] [fig.4] is a cross-sectional view taken along lime A-A in Figure 2.. Fig. 5 [0014] [fig.5] is a side view of a head lamp fixed to a fender bracket applied to the structure according to the embodiment of the present invention and a vehicle body part to which the fender bracket is fixed as viewed from the vehicle inner side. Fig. 6 [0015] [fig.6] is an enliu-ged perspective view of the fender bracket in Figure 5 and the head lamp as viewed obliquely from above the vehicle inner side. Fig. 7 [0016] [fig.7] is a cross-sectional view of a hood cushion stay applied to the structure according to an embodiment of the present invention as viewed from the vehicle front.. Description of Embodiments [0017] An embodiment of the present invention will bc dcscribcd bclow with reference to the drawings. [0018] Figure 1 to Figure 7 illustratc a vehicle front structure according to an embodiment of the present invention. In the drawings. it should bc notcd that a direction of an arrow Fr indicatcs the vehicle front, a direction of an arrow I indicatcs a vehicle inner side. and a direction of an arrow U indicatcs an upper sicle of the vehicle. A direction of an arrow X indicatcs a vehicle width direction, and a direction of an arrow Y indicatcs a vehicle front-rem direction. [0019] As illustratcd in Figures 1 and 2. a vehicle front 1 of the structure according to the embodiment of the present invention includcs: a hood panel (a hood outer panel 2a and a hood inner panel 2b) 2 which is disposed on an upper part of the vehicle front 1 and constitutcs a front opcning-and-closing type front hood covcring an upper portion of an cnginc compartmcnt (or motor compartment) 10; fender panels 3 of front fonder disposed on both loft and right outer sidcs of the hood panel 2 in the vehicle width direction; vehicle body parts (for example. dash side front panels) 4 disposed on both loft and right sidcs inside the engine compartmcnt (or the motor compartmcnt) 10; and fonder ',rackets 5 fixod to the vehicle body parts 4, and the fonder panels 3 arc attached to the fonder bracloets 5. [0020] Thomforo, mounting picccs 31 l'ont into an L-shapc arc formod on the vehicle innor side of the fonder panels 3, and the nfounting picces 31 oxtend horizontally toward the vehicle innor sicle at positions substantially cormsponding to the fonder bracioets 5 and arc fixedly fastened to the fonder braacts 5 by a bolts 32 or the like. Furthormorc, the vehicle body part 4 extonds along the vehicle front-rear direction, and includcs an upper surface 4a, a side surface 4b on the vehicle innor side, and a front surface 4c on the vehicle front side. [0021] The fonder bracket 5 in the vehicle front structure of the pi-osent ombodiment includos a lower bracket 6 made of a shoot motal fixod at a lower portion thoroof to the vehicle body part 4 and an upper bracket 7 made of a shoot motal to an upper portion of which the tender panel 3 is fixcd, and has a two-tior structure in which the upper bracket 7 is disposod over the upper portion of the lower bracket 6 as illustratcd in Figure 2 to Figure 7. Tho upper bracket 7 is disposod in a clearance R roquired for podestrian protection sot to have a dimension apart from the hood outor panel 2a of the hood panel 2 by a prodotorminod distance downward (insidc the enginc compartmont 10) of the vehicle, whilo the lower bracket 6 is disposod outsidc the clearance R roquirod for pcdestrian protection, and the upper bracket 7 is configurod to have a levier rigidity than the lower bracket 6. [0022] As illustrated in Figure 2 to Figure 7, the lower bracket 6 of the present embodiment includes a tiont-rear extending surface 61 extending in the vehicle vertical direction and the vehicle front-rear direction and facing the vehicle width direction, a widthwise extending surface 62 extending in the vehicle vertical direction and the vehicle width direction and facing the vehicle front-rear direction, and a top surface 63 extending continuously from an upper end of the front-rear extending surface 61 and an upper end of the widthwise extending surface 62 in the vehicle width direction and the vehicle front-rear direction, respectively. The lower bracket 6 is provided in an upright position from an upper portion of the vehicle body part 4 by extending a lower portion Gla of the front-rear extending surface 61 downward of the vehicle and joining with the side surface 4b of the vehicle body part 4 in an overlapped manner, and then bending a lower portion 62a of the widthwise extending surface 62 toward the vehicle front side and joining with the upper surface 4a of the vehicle body part 4 in an overlapped manner, and joining the joining piece 64 extending toward the vehicle rear from a rear portion of the top surface 63 with the upper surface 4a of the vehicle body part 4 in an overlapped manner. It shouM be noted that the front-rear extending surfaces 61 may be fonned at least on the vehicle inner side, and the widthwise extending surface 62 may be formed at least 011 the vehicle front side. 6 [0023] On the other hand, the upper bracket 7 of the present cmbodirnent bas a substantially crank-shapcd cross section as a wholc, and the lower portion 71 of the upper bracket 7 extends toward the vehicle inner sicle substantially in parallel to the top surface 63 of the lower bracket 6, and is fixcd to positions at the vehicle front and rcar of the top surface 63. A lower fixing portion 71a of the upper bracket 7 on the vehicle front sicle is providcd at a position overlapping with the front-rcar extending surface 61 in the vehicle width direction in plan vicw of the vehicle, and at a position overlapping with the widthwisc extending surface 62 in the vehicle front-rcar direction. [0024] The fender bracket 5 including the lower bracket 6 and the upper bracket 7 in such a shape and positional rclationship is configurcd to be capable of achicving pedestrian protection and adjusting the position in all directions such as the vehicle vertical direction, the vehicle width direction and the vehicle front-rcar direction with respect to the vehicle body part 4. [0025] As illustratcd in Figure 3, Figure 4, Figure 6 and Figure 7, the upper bracket 7 of the present embodiment is formcd into a plate shape in which an intermediate portion in the vehicle vertical direction has a surface facing the vehicle width direction. That is, the upper bracket 7 includcs a first vertical wall portion 72 extending upward of the vehicle from the lower portion 71 including the lower fixing portions 71a and 71b, a first inclined wall portion 73 extending upward of the vehicle from an upper end of the first vertical wall portion 72 toward the vehicle inncr sidc, and a second vertical wall portion 74 extending upward of the vehicle from an upper end of the first inclined wall portion 73, and is formed into an overhung shape. Moreover, the upper bracket 7 includes an upper portion 75 extending horizontally toward the vehicle outer sicle from an upper end of the second vertical wall portion 74, and the tender panel 3 is fixed to the upper bracket 7 by placing the mounting piece 31 of the fender panel 3 on the upper portion 75 and tightening the boit 32 or the like. [0026] Accordingly, when an impact load is applied to the fender bracket 5 from above the vehicle, the first vertical wall portion 72 and the first inclined wall portion 73 of the upper bracket 7 become starting points of bending, so that the upper bracket 7 is detbrmed so as to be folded to absorb the impact load, and thereby the pedestrian protection is achieved. [0027] Furthermore, as illustrated in Figure 4, the second vertical wall portion 74 of the upper bracket 7 of the present embodiment is formed into an inclined surface shape inclined so that the upper portion is positioned at the vehicle outer sicle, and an angle of inclination 0 of the inclined surface is set to, for example, 10 degrees to 12 degrees. As described above, the reason why the second vertical wall portion 74 is inclined is that the rigidity of the upper bracket 7 is lowered by applying an angle of inclination 0 to the second vertical wall portion 74, so that the pedestrian protection is achieved. It 7 should bc notcd that if the angle of inclination 0 of thc second vertical wall portion 74 is too small, thc rigidity of thc upper bracket 7 cannot bc sufficicntly rcduccd, and when the angle of inclination 0 of thc second vertical wall portion 74 is too largo, thc rigidity of thc upper bracket 7 is cxoessively decrcascd. [0028] Furthcrmorc, as illustratcd in Figures 5 and 6, thc upper portion 75 of the upper bracket 7 of thc present cmbodirnont includcs a hcad lamp fixing portion 75a at the front portion on thc vehicle front sidc, and thc outcr mar portion of the hcad lamp 8 mountcd on the vehicle front si& is fixcd to thc hcad lamp fixing portion 75a via thc mounting picoe 31 of thc fonder panel 3 by mcans of thc stay portion 81 and thc fastcning boit (which rnay be a fastener such as a scrcw) 82 and thc like. In othcr words, the upper brackct 7 is uscd for fixing thc outcr rear portion of the hcad lamp 8. Thcreforc, the stay portion 81 of thc hcad lamp 8 cxtends upward of the vehicle from thc upper surface of thc miter rear portion of the hcad lamp 8, and extends toward thc vehicle rear whilc having a length and a width which can ovcrlap with a front portion of thc mounting piccc 31 of the fonder panel 3. [0029] As illustratcd in figures 2 3 5 and 6, a fragile portion 76 disposcd so as to extend across the first inclined wall portion 73 and the second vertical wall portion 74 is providcd bclow the hcad lamp fixing portion 75a along thc vehicle vertical direction. The fragile portion 76 rnay he forrned by providing an opcning or by making thc thickncss of the portion concerncd thinncr than thc thicknoss of calier portions. By providing the fragile portion 76 in such a position, the rigidity of the upper bracket 7 is lower than that of the lower bracket 6, and at the time of load input from above the vehicle, the upper bracket 7 is easily deformed, so that the input load can be effectively absorbed. [0030] On the other hand, as illustrated in Figure 2 and Figure 5, the lower fixing portion of the upper bracket 7 of the present embodiment includes a front lower fixing portion 71a and a rear lower fixing portion 71b, and the front lower fixing portion 71a and the rear lower fixing portion 71b are fixed to planes at a different height. Therefore, the top surface 63 of the lower bracket 6 is formed such that the position of a front plane portion 63a is lower than that of a rear plane portion 63b, a rear inclined surface 63c inclined upward toward the rear is formed between the front plane portion 63a and the rear plane portion 63b, and the front plane portion 63a, the inclined surface 63c, and the rear plane portion 63b are sequentially arranged in this order from the vehicle front toward the vehicle rear. That is, the front plane portion 63a and the rear plane portion 63b are partitioning surfaces with the inclined surface 63c interposed therebetween, and a joining surface is not present on the same plane. Moreover, the lower portion 71 of the upper bracket 7 are not joined entirely to the top surface 63 of the lower bracket 6. 8 [0031] Accordingly, the hcad lamp 8, which k a weight componcnt, is fixcd to the hcad lamp fixing portion 75a on the vehicle front sicle of the upper portion 75 of the upper ['racket 7, and even if the load in the direction in which the upper portion 75 falls toward the vehicle front k applicd to the hcad lamp fixing portion 75a, sincc the front plane portion 63a and the rear plane portion 63b arc not formcd in a plane having the sanie height, the load can be resisted so that the upper ['racket 7 can be prevented from ['oing pecled casily off the lower ['racket 6, which providcs a structure against peeling. [0032] -In the upper bracket 7 of the present cmbodi nient, the joining strcngth of the front lower fixing portion 71a k set to be highcr than the joining strcngth of the rear lower fixing portion 71b. For example, in the vehicle front structure of the present cmbodiment, as illustrated in Figure 3, the number of weld points W of the front lower fixing portion 71a is three, and the number of weld points W of the rear lower fixing portion 71b is two, so that the front lower fixing portion 71a has a grcater number of wcld points W than the rear lower fixing portion 71b, and thus, has a highcr joining strength with respect to the lower bracket 6. The surface arca of the front lower fixing portion 71a is largcr than the surface arca of the rear lower fixing portion 71 b. That k, in the vehicle front structure of the present embodiment, the stability of the vehicle front 1 is stabil izcd by incrcasing the joining strength of the front lower fixing portion 71a which k subjected to a hcavy load. [0033] Furthermore, in the upper bracket 7 of the present embodiment, the front lower fixing portion 71a and the rear lower fixing portion 71b are formed in a shape having surfaces parallel to each other in side view of the vehicle as illustrated in Figure 2 and Figure 5. In the upper bracket 7 of the present embodiment, the front lower fixing portion 71a and the rear lower fixing portion 71b are formed on horizontal surfaces having different height but may be formed on inclined surfaces having the same angle. Theretbre, the upper bracket 7 is capable of adjusting the position in the vehicle frontrear direction and the vehicle width direction by moving the front lower fixing portion 71a and the rear lower fixing portion 71b on the lower bracket 6, installing and fixing the same at predetermined positions. [0034] On the other hand, the upper surface 4a, which is a portion of the vehicle body part 4 overlapping with the lower bracket 6 of the fender bracket 5 is formed into an inclined surface shape in which the vehicle rear side is higher than the vehicle front side. Therefore, the lower bracket 6 is configured to be adjusted in position in the vehicle vertical direction and installed and fixed at a predetermined position by moving the front-rear extending surface 61, the widthwise extending surface 62 and the joining piece 64 of the top surface 63 along the inclined surface (upper surface 4a) of the vehicle body part 4. [0035] As illustrated in Figure 3 and Figure 5 to Figure 7, a hood cushion stay 9 is fixed to 9 the second vertical wall portion 74 in an intermediate portion in the vehicle vertical direction of the upper bracket 7 of the prcsent embodiment, which is an upper portion of the center portion in the vehicle front-rear direction. The hood cushion stay 9 is an inverted L-shaped part which is fixed to a lower surface of the hood inncr panel 2b constituting the hood panel 2 and receives a hood cushion 21 having a function such as shock relaxation whcn closing the hood panel 2, and has a fixing piece 91 fixed to the second vertical wall portion 74 and a contact piece 92 abutting on the hood cushion 21. On the othcr hand, openings 76, 77 arc providcd at front and rear portions of the intermediate portion of the upper bracket 7 in the vehicle vertical direction with the hood cushion stay 9 interposed therebetween. The front opcning 76 is providcd on the vehicle front side of the hood cushion stay 9 and is configured as a fragile portion described M'ove. Furthermore, the rcar opcning 77 is providcd on the vehicle rcar sicle of the hood cushion stay 9, is configured as an additional fragile portion, and is formcd so that the opening arca thereof is smaller than that of the front opcning 76 to avoid increase in vulnerability thercof. [0036] Accordingly, the upper portion of the second vertical wall portion 74 of the upper bracket 7, which fixes the hood cushion stay 9. is configured to satisfy such a condition that a certain &grec of rigidity is required so as not to be deformed by a load applicd from abovc (pushing by the hand or pressing a load or the like) in a normal condition, but deformation is required for a load from a pedestrian at the time of a collision. That is, in a case in which a load applied to the hood panel 2 is applied to the upper bracket 7 via the hood cushion stay 9 at the time of load input to the hood panel 2 is applied from above the vehicle, the upper bracket 7 is easily deformed. [0037] In this manner the vehicle front structure according to the embodiment of the present invention has a structure including the fender bracket 5 fixed to the vehicle body part 4 of the vehicle front 1, and the tender panel 3 is attached to the tender bracket 5. The fender bracket 5 includes a lower bracket 6 fixed at a lower portion thereof to the vehicle body part 4, and an upper bracket 7 fixed at an upper portion thereof to a fender panel 3. The lower bracket 6 includes a front-rear extending surface 61 extending in the vehicle vertical direction and the vehicle front-rem- direction and facing the vehicle width direction, a widthwise extending surface 62 extending in the vehicle vertical direction and the vehicle width direction and facing the vehicle frontrear direction, and a top surface 63 extending continuously from an upper end of the front-rear extending surface 61 and an upper end of the widthwise extending surface 62 in the vehicle width direction and the vehicle front-rear direction, respectively. Moreover, the upper bracket 7 is configured to have a lower rigidity than the lower bracket 6. Furthermore, a lower portion of the upper bracket 7 is fixed to a top surface 63 of the lower bracket 6. [0038] Therefore, in thc vehicle front structure of thc present invention, sincc thc fcndcr bracket 5 includcs thc lower bracket 6 and thc upper brackct 7 having a lower rigidity than thc lower brackct 6, thc upper bracket 7 and thc lower bracket 6 arc fixcd in an ovcrlappcd manncr at a prcscribcd position to form thc two-ticr structure, and thc fcndcr bracket 5 is configurcd to bc adjustablc in position in ail directions such as thc vchicic vertical direction, thc vehicle width direction and thc vehicle front-rcar direction with respect to thc vehicle body part 4, thc upper brackct 7 is disposcd within thc clearance R rcquircd for pcdcstrian protection, and thc lower bracket 6 is disposcd outsidc thc clearance R rcquircd for pcdcstrian protection, go that thc pcdcstrian colliding with thc hood panel 2 of thc vehicle front 1 can bc protcctcd. Morcovcr, in thc vehicle front structure of thc present invention, it is possible to movc both of thc lower bracket 6 and thc upper bracket 7 which constitutc thc fonder bracket 5 dircctly and to improvc thc positional accuracy and asscmbling workability 0f thc fcndcr brackct 5, so that a break line of thc fcndcr panel 3 can casily bc forrncd, and thc appcarancc quality of thc vehicle front 1 can bc improvcd. [0039] -In thc vehicle front structure of thc present embodiment, thc upper brackct 7 is formcd into a plate shapc having a surface including an intcrrnediatc portion in thc vehicle vertical direction facing thc vehicle width direction, and includcs a first vertical wall portion 72 cxtcnding upward of thc vehicle from thc lower portion 71 including thc lower fixing portions 71a and 71b, a first inclined wall portion 73 cxtending upward of the vehicle from an upper end of the first vertical wall portion 72 towai-d the vehicle inner sicle, and a second vertical wall portion 74 extending upward of the vehicle from an upper end of the first inclined wall portion 73. Therefore, according to the vehicle front structure of the present embodiment, when an impact load is applied to the fender bracket 5 from above the vehicle, the first vertical wall portion 72 and the first inclined wall portion 73 of the upper bracket 7 become the starting point of the bending, and thus, the upper bracket 7 is reliably deformed to absorb the impact load, and the pedestrian protection can be promoted. [0040] Furthermore, in the vehicle front structure of the present embodiment, since the second vertical wall portion is formed in an inclined surface shape, it is possible to reduce the rigidity of the upper bracket 7, and to deform the upper bracket 7 reliably and quickly at the time of load input to the vehicle front 1 of the vehicle. [0041] In the vehicle front structure of the present embodiment, the upper bracket 7 includes the head lamp fixing portion 75a at the front portion on the vehicle front sicle, and the fragile portion 76 disposed so as to extend across the first inclined wall portion 73 and the second vertical wall portion 74 is provided at a position downward of the head lamp fixing portion 75a, so that the rigidity of the upper bracket 7 can reliably be made lower than that of the lower bracket 6. Therefore, according to the vehicle front 11 structure of the present embodirnent, when the load is input to the vehicle front portion 1 from above the vehicle, the upper ',racket 7 is reliably defortned, and a load absorption effcct of die upper ',racket 7 can be enhanced. [0042] On the other hand, in the vehicle front structure of the present embodiment, since the lower fixing portion includes a front lower fixing portion 71a and a rear lower fixing portion 71b, and the front lower fixing portion 71a and the rear lower fixing portion 71b arc fixed to planes at diffcrent heights (the front plane portion 63a and the rear plane portion 63b of the top surface 63), cven with the structure in which the hcad lamp 8, which is a weight component, is fixed to the head lamp fixing portion 75a on the vehicle front sicle of the upper portion 75 of the upper ',racket 7, and a load in the direction in which the upper portion 75 falls toward the vehicle front is applicd to the hcad larnp fixing portion 75a, it is possible to rcsist die load in a direction of falling toward the vehicle front, and in comparison with die case in which the joining surfaces arc providcd on the same plane, die upper bracket 7 may be prevcnted from being peeled off the lower bracket 6 casily, and the load absorbing performance of the upper bracket 7 can lie sufficicntly demonstrated. [0043] Furthermore, in the vehicle front structure of the present embodiment, since the joining strcngth of the front lower fixing portion 71a is set to he greatcr than the joining strcngth of the rear lower fixing portion 71b, the front lower fixing portion 71a, which tends to he subjected to a heavy load or the like, can be firmly joincd to the lower bracket 6, so tint the vehicle front portion 1 can be stabilized. [0044] Furthermore, in the vehicle front structure of the present embodiment, silice the front lower fixing portion 71a and the rear lower fixing portion 7 lb are formed in a shape having surfaces parallel to each other when viewed from the side of the vehicle, while a portion of the vehicle body part 4 which overlaps with the fender bracket 5 is formed into an inclined surface shape in which the vehicle rear side is higher than the vehicle front side, the front lower fixing portion 71a and the rear lower fixing portion 71b of the upper bracket 7 can be joined with the positions in the vehicle front-rear direction and in the vehicle width direction adjusted by moving on the lower bracket 6, the position in the vehicle vertical direction adjusted by moving the front-rear extending surface 61, the widthwise extending surface 62 and the joining piece 64 of top surface 63 of the lower bracket 6 along the inclined surface of the vehicle body part 4. Theretbre, according to the vehicle &ont structure of the present embodiment, the positional accuracy and the assembling workability of the tender bracket 5 can be further improved. [0045] In the vehicle front structure of the present embodiment, the hood cushion stay 9 is fixed to an upper portion of the upper bracket 7 in the intermediate portion in the vehicle vertical direction, which is an upper portion of the center portion in the vehicle 12 front-rear direction, and openings 76, 77 are provided at front and rear portions of the upper bracket 7 in the intermediate portion in the vehicle vertical direction with the hood cushion stay 9 interposed therebetween. Therefore, according to the vehicle front structure of the present embodiment, the upper portion of the second vertical wall portion 74 of the upper bracket 7 to which the hood cushion stay 9 is fixed can secure enough rigidity to prevent deformation of the upper bracket 7 due to a load applied from above (pushing by hand or pressing a load, or the like) in a normal condition, ln contrast, at the lime of load input from above the vehicle and when the load applied to the hood panel 2 is applied to the upper bracket 7 through the hood cushion stay 9, the upper bracket 7 can easily be deformed. [0046] Furthermore, in the vehicle front structure of the present embodiment, sine° the lower fixing portion 71a of the upper bracket 7 is provided at a position overlapping with the front-rear extending surfaces 61 in the vehicle width direction and ovcrlapping with the widthwise extending surface 62 in the vehicle front-rear direction in plan vicw of the vehicle, it is possible to copc with a case in which a space for the lower bracket 6 is not sufficicntly secured with respect to the upper bracket 7 duc to the convenience of layout in the engine compartment (or the motor compartment) 10. In addition, whcn a flange is formed at the front end portion from the front end of the front lower fixing portion 71a to the upper portion 75 of the upper ',racket 7, the rigidity of the componcnt is secured. Furthermore, as illustratcd in Figure 3 and Figure 6, when the front lower fixing portion 71a of the upper bracket 7 is provided with a portion protruding from the top surface 63 of the lower bracket 6, and a hole H is provided in this part, a hamess or the like may be thed by attaching a clip or the like to the hole H. Moreover, it is also possible to provide two holes H, and use one hole as a hole for positioning or as a hole for supporting a jig (work tool, tool). [0047] Although the embodiments of the present invention have been described thus far, the present invention is not limited to the embodiments described above, and various alterations or modifications may be made based on the technical concept of the present invention. [0048] For example, although the lower bracket 6 according to the embodiment described above includes the front-rear extending surfaces 61 formed on the vehicle inner side and the widthwise extending surface 62 formed on the vehicle front side, the front-rear extending surfaces 61 may be formed on the vehicle outer side and the widthwise extending surface 62 may be formed on the vehicle rear side, for example, for increasing rigidity. Reference Signs List [0049] 1 vehicle front 13 [0050] 2 hood panel [0051] 3 fonder panel [0052] 4 vehicle body part [0053] 4a upper surface [0054] 4b sicle surface on the vehicle inner sicle [0055] 5 fonder bracket [0056] 6 lower bracket [0057] 7 upper bracket [0058] 8 head lamp [0059] 9 hood cushion stay [0060] 31 fonder panel mounting picce [0061] 32 boit [0062] 61 front-rear extending surfaces [0063] 61a lower portion [0064] 62 widthwisc extending surface [0065] 62a lower portion [0066] 63 top surface [0067] 63a front plane portion [0068] 63b rear plane portion [0069] 64 joining piecc [0070] 71 lower portion of upper bracket [0071] 71a front lower fixing portion [0072] 71b rear lower fixing portion [0073] 72 first vertical wall portion of upper bracket [0074] 73 first inclined wall portion of upper bracket [0075] 74 second vertical wall portion of upper bracket [0076] 75 upper portion of upper bracket [0077] 75a head lamp fixing portion [0078] 76 fragile portion (front opening) [0079] 77 rear opening [0080] 81 head lamp stay portion [0081] 82 fastening bolt [0082] REVENDICATIONS1. A vehicle front structure including a fonder bracket (5) fixed to a vehicle body part (4) of a vehicle front, and a tender panel (3) attached to the tender bracket (5), characterized in that: - the tender bracket (5) includes a lower bracket (6) fixed at a lower portion thereof to the vehicle body part (4) and an upper bracket (7) fixed at an upper portion thcreof to the tender panel (3), - the lower bracket (6) includes a front-rear extending surface (61) extending in a vehicle vertical direction and a vehicle front-rear direction and facing the vehicle width direction, a widthwise extending surface (62) extending in the vehicle vertical direction and the vehicle width direction and facing the vehicle front-relu- direction, and a top surface (63) extending continuously from an upper end of the front-rear extending surface (61) and an upper end of the widthwise extending surface (62) in the vehicle width direction and the vehicle front-rear direction respectively, and - the upper bracket (7) is configured to have a lower rigidity than the lower bracket (6), and a lower portion (71) of the upper bracket (7) is fixed to the top surface (63) of the lower bracket (6). 2. The vehicle front structure according to claim 1, wherein the upper bracket (7) is formed into a plate shape having a surface including an intermediate portion in the vehicle vertical direction facing the vehicle width direction, and includes a first vertical wall portion (72) extending upward of the vehicle from the lower fixing portion, a first inclined wall portion (73) extending upward of the vehicle from an upper end of the first vertical wall portion (72) toward a vehicle inner sicle, and a second vertical wall portion (74) extending upward of the vehicle from the upper end of the first inclined wall portion (73). 3. The vehicle front structure according to claim 2, wherein the second vertical wall portion (74) is formed in an inclined surface shape. 4. The vehicle front structure according to claim 2 or 3, wherein the upper bracket (7) includes a head lamp fixing portion (75a) at a front portion on a vehicle front side, and a fragile portion (76) disposed to extend across the first inclined wall portion (73) and the second vertical wall portion (74) below the head lamp fixing portion.. 5. The vehicle front structure according to any one of claims 1 to 4, wherein the lower portion (71) includes a front lower fixing portion 15 (71a) and a rcar lowcr fixing portion (7111), and the front lower fixing portion (71a) and the rcar lowcr fixing portion (71b) arc fixcd to planes at diffcrent hcights. 6. The vehicle front structure according to any one of claims 1 to 5, wherein a joining strcngth of the front lowcr fixing portion (71a) is set to be higher than a joining strength of the rcar lowcr fixing portion (711)). 7. The vehicle front structure according to any one of claims 1 to 6, wherein the front lowcr fixing portion (71a) and the rcar lower fixing portion (7111) arc forrned to have surfaces parallel to cach other in sicle vicw of the vehicle, whilc part of the vehicle body part overlapping with the fonder brackct (5) is formed into an inclincd shapc in which a vehicle rcar sidc is highcr than the vehicle front sidc. 8. The vehicle front structure according to any one of claims 1 to 7, wherein a hood cushion stay (9) is fixed to an upper portion of the upper brackct (7) in the intermediate portion in the vehicle vertical direction, which is an upper portion of the center portion in the vehicle front-rear direction, and openings (76, 77) arc providcd at front and rcar portions of the upper bracket (7) in the intermediate portion in the vehicle vertical direction with the hood cushion stay (9) intcrposed therebetween. 9. The vehicle front structure according to any one of claims 1 to 8, wherein the lower fixing portion (71) of the upper bracket (7) is provided at a position overlapping with the front-rear extending surface (41) in the vehicle width direction in plan view of the vehicle, and is provided at a position overlapping with the widthwise extending surface (62) in the vehicle front-rear direction.