JP2016117303A - Vehicle body front structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body front structure capable of efficiently receiving an input load while a front hood is closed, and a load from a surrounding on-vehicle device.SOLUTION: The vehicle body front structure includes lamp support braces 3 extending upward from the front end parts of left and right front side members, a hood lock member 4 extending in a vehicle width direction between the upper end parts of the lamp support braces, and a hood cushion rubber fitting parts 30 provided in the upper surface of the coupled part of the lamp support brace and the hood lock member. The hood lock member 4 includes a center part extending roughly horizontally, and a side end part 41 bent upward on the vehicle width outside of the center part, and the side end parts 41 and 46 are stacked and joined on the upper side faces 32 and 36 of the lamp support braces.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle body front portion structure, and more particularly to a structure of a joint portion between a hood lock member end portion and a lamp support brace upper end portion in a vehicle body front portion.

  Conventionally, as shown in FIG. 7, for example, lamp support braces 13, 13 extending upward from left and right front side member front end portions are provided at the front end portion of the vehicle body. The end portion 141 of the hood lock member 14 extending in the direction is joined, and the upper end portion of the hood lock brace 18 is joined to the central portion 140 of the hood lock member 14, and a radiator or condenser is enclosed in the region 12 surrounded by them. Etc. is mounted (refer to Patent Document 1).

  The hood lock member 14 is provided with cushion rubber mounting portions 142 at the center and both sides in the vehicle width direction so as to support the front end portion of a front hood (not shown) that opens and closes forward, and the load F when the front hood is closed. Is input to the lamp support brace 13 as shown in FIG. For this reason, the lamp support brace 13 is required to have a large cross-sectional performance that can withstand the load, and is likely to increase in weight.

Japanese Patent No. 5299583

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a vehicle body front structure that can efficiently receive an input load when the front hood is closed and a load from a peripheral vehicle-mounted device. There is.

  In order to solve the above-described problems, a vehicle body front structure according to the present invention includes a lamp support brace (3, 3) extending upward from front ends of left and right front side members (2, 2), and an upper end portion of the lamp support brace. A hood lock member (4) extending in the vehicle width direction, and a hood cushion rubber mounting portion (30, 30) provided on an upper surface of a joint portion between the lamp support brace and the hood lock member. The hood lock member (4) includes a central portion (40) extending substantially horizontally and a side end portion (41) curved upward on the outer side in the vehicle width direction of the central portion. 41) is overlapped and joined to the upper end side surface (32) of the lamp support brace.

  In the present invention, as described above, since the hood lock member is joined to the upper end side surface of the lamp support brace at the side end curved upward, the input load when the front hood is closed is Dispersed from the upper end to the side end of the hood lock member, the shock can be absorbed efficiently. Further, since the side surfaces of the members themselves are joined to each other instead of the flange or the like, it is advantageous in securing strength and rigidity at the joint portion.

  In the present invention, the lamp support brace (3) includes a side surface (32) facing inward in the vehicle width direction, a front surface (33) extending outward from the front edge of the side surface in the vehicle width direction, and a rear edge of the side surface. Including a rear surface (34) extending outward in the vehicle width direction, and the side end portion (41) of the hood lock member (4) is curved and continuous to a substantially horizontal upper surface (42) of the central portion. A side surface (46), a front surface (45) extending downward or sideward from the upper surface and a front edge of the side surface, and a rear surface (47) extending downward or sideward from the rear edge of the upper surface and the side surface. ), And the side surface (46), front surface (45), and rear surface (47) of the side end portion of the hood lock member (4) are connected to the side surface (32) and the front surface (32) of the lamp support brace (3). 33), in an aspect joined to the rear surface (34), Re also sterically joined with the hood lock member and the lamp support three sides of the brace forming a channel-shaped, is more advantageous for strength and rigidity ensure absorption and coupling of the input load of the front hood is closed.

  The lamp support brace (3) further includes a lamp support member (5) extending outward in the vehicle width direction, and the lamp support member (5) is joined to the rear surface (34) of the lamp support brace. And at least one of the joining points (W6), the rear surface (34) of the lamp support brace and the rear surface (47) of the side end portion of the hood lock member are joined in the front. This is advantageous not only for absorbing the input load when the hood is closed, but also for supporting the load of the headlamp assembly.

  Further, a cushion bracket (31) is disposed above the coupling portion of the lamp support brace (3), the hood lock member (4), and the lamp support member (5), and the cushion bracket (31 ) Has a top surface including the hood cushion rubber mounting portion (30) and flanges (36, 35, 37) extending downward from the vehicle width direction front side and the vehicle length direction front side and rear side, Of the side end of the hood lock member (4), the front surface (45), the rear surface (47), and the side surface (32) and front surface (33) of the lamp support brace (3). ) In the aspect joined to the rear surface (34), the input load when the front hood is closed is joined to both the lamp support brace and the hood lock member. Since distributed over each member through the cushion bracket, shock can be efficiently dispersed absorb.

It is a perspective view which shows the vehicle body front part which implemented the vehicle body front part structure which concerns on this invention. It is a principal part expansion perspective view of FIG. 1 which shows the vehicle body front part structure which concerns on this invention. It is a front view which shows the vehicle body front part which implemented the vehicle body front part structure which concerns on this invention. It is a principal part enlarged front view of FIG. 3 which shows the vehicle body front part structure which concerns on this invention. It is the perspective view seen from the A direction of FIG. It is BB sectional drawing of FIG. It is a front view which shows the conventional vehicle body front part structure. It is a principal part enlarged front view of FIG. 7 which shows the conventional vehicle body front part structure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, front side members 2, 2 that form the basic structure of the vehicle body 1 extend in the vehicle length direction on both the left and right sides of the front portion of the vehicle body 1, and a pair of left and right sides that extend upward from the front end portions 21, 21. Lamp support braces 3 and 3 are provided, and a hood lock member 4 extending in the vehicle width direction is provided between upper end portions thereof.

  A pair of left and right lower braces 6, 6 extending downward from the front end portions 21, 21 of the front side members 2, 2 are provided, and lower end portions 61, 61 are provided at both ends 71, 61 of the lower member 7 extending in the vehicle width direction. 71 is connected. A hood lock brace 8 extending in the vehicle height direction is provided between the central portion 70 of the lower member 7 and the central portion 40 of the hood lock member 4, and between the front end portions 21, 21 of the front side members 2, 2. Is provided with a cross member 9 extending in the vehicle width direction.

  Lamp support panels 5 and 5 are provided outside the left and right lamp support braces 3 and 3 in the vehicle width direction. The lamp support panels 5 and 5 are each formed in a rectangular frame shape including an upper side 51, an outer side 52, a lower side 53, and an inner side 54, and the headlamp assembly 11 ( 4) is attached. As shown in FIG. 5, the upper side portion 51 of the lamp support panel 5 has an upper surface 55 extending forward from the upper portion, and the inner side portion 54 of the lamp support panel 5 is an edge portion on the inner side in the vehicle width direction. The inner side surface 56 extends forward from the inner surface 56, and all of them are formed in an L-shaped cross section to enhance the rigidity.

  As shown in FIGS. 2 to 6, the lamp support brace 3 includes a side surface 32 facing inward in the vehicle width direction, a front surface 33 extending outward from the front edge in the vehicle width direction, and outward in the vehicle width direction from the rear edge. A rear surface that includes an extended rear surface 34 and is formed into a channel shape (cross-sectionally U-shaped) opened outward in the vehicle width direction by press-molding a metal plate (steel plate), and wider than the front surface 33 The inner side portion 54 of the lamp support panel 5 is overlapped and joined to the front surface side of the lamp 34.

  2 to 6, the hood lock member 4 has an upper surface 42 that is substantially horizontal in the vehicle length direction, a front surface 43 that extends downward from its front edge, and a rear surface 44 that extends downward from its rear edge. Then, by pressing a metal plate (steel plate), it is formed in a channel shape (cross-sectional U-shape) that opens downward, and extends substantially horizontally in the vehicle width direction. It includes a side end portion 41 that curves upward on the outer side in the direction, and is joined to a side surface 32 adjacent to the upper end portion of the lamp support brace 3 at the side end portion 41 as will be described in detail later.

  The side end portion 41 of the hood lock member 4 includes a side surface 46 that is curved and continuous with a substantially horizontal upper surface 42 of the central portion 40, a front surface 45 that extends downward or sideward from the front edge thereof, and a rear edge of the side surface 46. A rear surface 47 that extends downward or laterally from the vehicle is formed, and has a U-shaped cross section that is open to the outside in the vehicle width direction in plan view. Further, as shown in FIGS. 2 and 6, the front and rear edges of the side surface 46 are side ends compared to the side surface 46 that is polymerized to the side surface 32 and is continuous with the upper surface 42 through a slightly sharp curve. Ribs 48 and 49 that are curved in a gentle arc shape toward the upper end of the portion 41 are formed.

  On the other hand, a cushion bracket 31 is provided at the upper end of the lamp support brace 3. As shown in FIGS. 2, 4, and 5, the cushion bracket 31 is formed by pressing a metal plate (steel plate) around the upper surface of a substantially pentagonal or trapezoidal shape in a plan view including the hood cushion rubber mounting portion 30. Further, flanges 35, 36, 37 extending downward from the respective sides of the vehicle width direction inner side (36) and the vehicle length direction front side (35) rear side (37) are formed, and these flanges 35, 36, 37 are formed. In FIG. 5, the lamp support brace 3 is joined to the side surface 32, the front surface 33, and the rear surface 34 of the upper end portion, and is also joined to the side surface 46, the front surface 45, and the rear surface 47 of the side end portion 41 of the hood lock member 4.

  That is, the flange 36 inside the vehicle width direction of the cushion bracket 31, the front flange 35, and the rear flange 37 are superposed so as to cover the side surface 32, the front surface 33, and the rear surface 34 of the upper end portion of the lamp support brace 3 from above, and further The side surface 46, the front surface 45, and the rear surface 47 of the hood lock member side end 41 are superposed so as to surround from the side, and as shown in FIGS. Spot welding is performed at w6.

  Among these, at the welding point w1, the side surface 32 of the upper end portion of the lamp support brace 3, the flange 36 of the cushion bracket 31 and the side surface 46 of the hood lock member side end portion 41 are overlapped in order and spot welded. At the welding point w2, prior to the welding, spot welding is performed by sequentially superposing the inner side surface 56 of the upper end portion of the inner side portion 54 of the lamp support panel 5, the side surface 32 of the upper end portion of the lamp support brace 3, and the flange 36 of the cushion bracket 31 in this order. Has been.

  Further, at the welding point w3, spot welding is performed in the order of the front surface 33 of the upper end portion of the lamp support brace 3, the front flange 35 of the cushion bracket 31, and the front surface 45 of the end portion 41 on the hood lock member side. The front surface 33 of the upper end portion of the support brace 3 and the front surface 45 of the hood lock member side end portion 41 are overlapped and spot-welded.

  Further, at the welding point w5, the rear surface 34 of the upper end portion of the lamp support brace 3, the rear flange 37 of the cushion bracket 31, the hood lock member side end portion, inside the through hole 50 of the inner side portion 54 of the lamp support panel 5. 41 are spot-welded in the order of the rear surface 47 of the lamp 41. At the welding point w6, the inner side 54 of the lamp support panel 5, the rear surface 34 of the upper end of the lamp support brace 3, and the rear surface 47 of the hood lock member side end 41 are arranged in this order. It is spot welded again.

  At the welding point w7, the inner side 54 of the lamp support panel 5 and the rear surface 34 of the lamp support brace 3 are overlapped and spot welded. The cushion bracket 31 is welded in advance so as to overlap the upper surface 55 of the upper side portion 51 of the lamp support panel 5.

  According to the vehicle body front structure as described above, the hood lock member 4 is welded and joined to the upper end side surface 32 of the lamp support brace 3 at the side end 41 curved upward with respect to the substantially horizontal central portion 40. As shown in FIG. 4, the input load F when the front hood is closed is input to the lamp support brace 3 and indicated by the arrow b as shown by the arrow a. As described above, from the upper end portion (30) of the lamp support brace 3, it is distributed to the side end portion 41 of the hood lock member 4, and the component force for compressing the hood lock member 4 in the vehicle width direction or the side end portion 41 As a result, a component force in the bending direction to increase the bending is generated, and the impact can be absorbed more efficiently than when the load is directly input to the lamp support brace.

  In particular, the configuration in which the lamp support brace 3 is inclined slightly inward with respect to the vehicle height direction reliably induces a component force toward the hood lock member 4 as described above.

  Further, the hood lock member 4 and the lamp support brace 3 having a channel shape are divided into three sides, that is, an inner side surface (32, 46) in the vehicle width direction, a front surface (33, 45) and a rear surface (34, 47) in the vehicle length direction. Three-dimensionally joined at the side surface, which is advantageous in securing the strength and rigidity of the joint. In addition to the input load F when the front hood is closed, the load of the headlamp assembly 11 is input to the lamp support brace 3, while the load of the cooling device such as the radiator 10 and the condenser is input to the hood lock member 4. However, it is advantageous in terms of securing strength and rigidity against these loads.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said each embodiment, Based on the technical idea of this invention, a various deformation | transformation and change are further possible.

  For example, in the above-described embodiment, the case where the cushion bracket 31 separate from the lamp support brace 3 is set is described. However, the hood cushion rubber mounting portion 30 may be provided at the upper end portion of the lamp support brace 3. Moreover, the number and arrangement | positioning of a welding point are not limited above, It can also be set as joining methods other than spot welding (resistance welding).

  Moreover, although the case where the rectangular frame-shaped lamp support panel 5 is set as the lamp support member has been described in the above embodiment, a lamp support member extending backward from the position of the upper side portion 51 of the lamp support panel 5 is set. This can also be implemented.

DESCRIPTION OF SYMBOLS 1 Car body 2 Front side member 3 Lamp support brace 4 Hood lock member 5 Lamp support panel 6 Lower brace 7 Lower member 8 Hood lock brace 10 Radiator 11 Head lamp assembly 30 Hood cushion rubber attaching part 31 Cushion brackets 32, 46 Sides 33, 43, 45 Front 34, 44, 47 Rear 35 Front flange 36 Flange 37 Rear flange 40 Central portion 41 Side end 42 Upper surface

Claims (4)

Lamp support braces extending upward from the front ends of the left and right front side members;
A hood lock member extending in the vehicle width direction between the upper ends of the lamp support braces;
In the vehicle body front structure comprising a hood cushion rubber mounting portion provided on the upper surface of the coupling portion between the lamp support brace and the hood lock member,
The hood lock member includes a central portion that extends substantially horizontally and a side end portion that curves upward at the vehicle width direction outer side of the central portion, and the side end portion is formed on a side surface of the upper end portion of the lamp support brace. A vehicle body front structure characterized by being overlapped and joined. The ramp support brace includes a side surface facing inward in the vehicle width direction, a front surface extending outward from the front edge of the side surface in the vehicle width direction, and a rear surface extending outward from the rear edge of the side surface in the vehicle width direction. ,
The side end portion of the hood lock member includes a side surface curved and continuous on a substantially horizontal upper surface of the central portion, a front surface extending downward or laterally from the upper surface and a front edge of the side surface, and the upper surface. And a rear surface extending downward or laterally from the rear edge of the side surface, and the side surface, front surface, and rear surface of the side end portion of the hood lock member are joined to the side surface, front surface, and rear surface of the lamp support brace. The vehicle body front part structure according to claim 1, wherein   A lamp support member extending outward in the vehicle width direction from the lamp support brace; and the lamp support member is joined to the rear surface of the lamp support brace and at least one of the joining points. The vehicle body front part structure according to claim 2, wherein a rear surface of the support brace and a rear surface of the side end portion of the hood lock member are joined.   A cushion bracket is disposed above the coupling portion of the lamp support brace, the hood lock member, and the lamp support member, and the cushion bracket includes an upper surface including the hood cushion rubber mounting portion and a vehicle width direction thereof. And flanges extending downward from the front side and the front side in the vehicle length direction, the flanges on each side of the side end portion of the hood lock member, the front surface, the rear surface, and the lamp support brace The vehicle body front part structure according to claim 3, wherein the structure is joined to a side surface, a front surface, and a rear surface.

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