JP2006290281A - Body front structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively disperse a load inputted to a front side member from the front of a vehicle body in a vertical direction of the vehicle body while suppressing a significant increase in the weight of the vehicle body.
An instrument panel reinforcement 24 for connecting left and right front pillars 12 and 14 and a steering gear box 50 for connecting left and right front side members 30 and 32 are connected to each other by left and right instrument panel dash braces 70. Has been.
[Selection] Figure 1

Description

  The present invention relates to a vehicle body front structure that connects a front side member of a vehicle body such as an automobile and a front pillar.

Conventionally, in a front body structure of an automobile or the like, a load input to the front side member is effectively applied to the tunnel member via the dash cross member by connecting the inclined portions of the left and right front side members with the dash cross member. A transmission structure has been proposed (see, for example, Patent Document 1). Further, a structure has been proposed in which left and right front side members are connected to each other by a dash cross member, and both ends of the dash cross member are connected to a front deck cross member that connects the left and right front pillars to each other (for example, patents). Reference 2).
JP2003-191862 JP 2004-74868

  However, in Patent Document 1, the load input to the front side member is effectively transmitted to the tunnel member disposed at the lower part of the vehicle body, but is not easily transmitted to the left and right front pillars disposed toward the upper part of the vehicle body. . As a result, at the time of a frontal collision of the vehicle, that is, when another vehicle or the like collides from the front of the vehicle body, it is difficult to stabilize the compression deformation of the front side member in the vehicle body longitudinal direction. Further, in Patent Document 2, the left and right front side members are connected to each other by the dash cross member, and both ends of the dash cross member are connected to the front deck cross member. The weight increases significantly.

  In view of the above facts, the present invention has an object to provide a vehicle body front structure that can effectively distribute the load input to the front side member from the front of the vehicle body in the vertical direction of the vehicle body while suppressing a significant increase in the vehicle body weight. And

  According to a first aspect of the present invention, the front structure of the vehicle body includes a left and right front side member whose longitudinal direction is disposed along the longitudinal direction of the vehicle body at a front portion of the vehicle body, and a rear portion extending below the vehicle body, and the left and right front sides. Left and right front pillars arranged in the longitudinal direction of the vehicle body on the outer side in the vehicle width direction of the members, and a steering gear box arranged in the longitudinal direction along the vehicle width direction and connecting the left and right front side members to each other A front pillar connecting member that is disposed along the vehicle width direction in the longitudinal direction and connects the left and right front pillars to each other; and a connecting member connecting means that connects the steering gear box and the front pillar connecting member to each other. It is characterized by having.

  A part of the load inputted from the front side of the vehicle body to the left and right front side members from the front side of the vehicle body is transmitted to the lower part of the vehicle body along the rear parts of the left and right front side members. Further, a part of the load is disposed along the vehicle width direction in the longitudinal direction, and the steering gear box that connects the left and right front side members to each other, and the connecting member connection that connects the steering gear box and the front pillar connecting member to each other. Means, the longitudinal direction is arranged along the vehicle width direction, the front pillar connecting member for connecting the left and right front pillars to each other, the longitudinal direction is arranged outside the vehicle width direction of the left and right front side members along the vehicle body vertical direction It is transmitted in the order of the left and right front pillars, and is transmitted to the upper part of the vehicle body by the left and right front pillars. Further, since the left and right front side members are connected by the steering gear box, there is no need to separately provide a front side member connecting member that increases the weight.

  According to a second aspect of the present invention, in the vehicle body front portion structure according to the first aspect, the front pillar connecting member is an instrument panel reinforcing member.

  By using the front pillar connecting member as the instrument panel reinforcing member, there is no need to provide the front pillar connecting member as a separate part.

  According to a third aspect of the present invention, in the vehicle body front portion structure according to any one of the first and second aspects, the dash cross is disposed on the vehicle body rear side of the steering gear box and connects the left and right front pillars to each other. It has a member.

  The load is also transmitted to the left and right front pillars by a dash cross member disposed on the rear side of the vehicle body of the steering gear box and connecting the left and right front pillars to each other.

  According to a fourth aspect of the present invention, in the vehicle body front structure according to any one of the first to third aspects, a vehicle mounting device is attached to the connecting member connecting means.

  By attaching the vehicle mounting device to the connecting member connecting means, the connecting device connecting means attached to the front pillar connecting member is assembled to the vehicle body, and at the same time, the vehicle mounting device is assembled to the vehicle body. Further, since the vehicle mounting device is supported by the front pillar connecting member and the steering gear box via the connecting member connecting means, movement of the vehicle mounting device to the rear of the vehicle body at the time of a vehicle front collision is suppressed.

  According to a fifth aspect of the present invention, in the vehicle body front portion structure according to the fourth aspect, the connecting portion between the steering gear box and the connecting member connecting means includes a vehicle longitudinal direction and a vehicle vertical direction of the connecting member connecting means. It has the positioning means.

  Since the connecting portion between the steering gear box and the connecting member connecting means has positioning means for the connecting member connecting means in the longitudinal direction of the vehicle body and the vertical direction of the vehicle body. At the same time as positioning with respect to the direction, positioning with respect to the longitudinal direction of the vehicle body and the vertical direction of the vehicle body of the vehicle mounting device attached to the coupling member coupling means is performed.

  The present invention according to claim 6 is the vehicle body front structure according to any one of claims 1 to 5, wherein both ends of the steering gear box in the vehicle width direction are coupled to the left and right front pillars and the connecting member. The connecting means is arranged inside the vehicle width direction of the left and right front side members.

  The front pillar and the connecting member connecting means support the left and right front side members from both sides in the vehicle width direction via the steering gear box. As a result, a part of the load input to the front side member from the front side of the vehicle body toward the rear side of the vehicle body is effectively distributed to both the front pillar and the connecting member connecting means via the steering gear box.

  The vehicle body front structure according to the first aspect of the present invention can effectively distribute the load input to the front side member from the front of the vehicle body in the vertical direction of the vehicle body while suppressing a significant increase in the vehicle body weight.

  The vehicle body front part structure according to the second aspect of the present invention does not require a front pillar connecting member as a separate part, and the number of parts can be reduced.

  In the vehicle body front portion structure according to the third aspect of the present invention, the load input to the front side member can be more effectively distributed in the vehicle body vertical direction.

  The vehicle body front part structure of the present invention according to claim 4 improves the assembling property of the vehicle mounting device to the vehicle body and the support rigidity of the vehicle mounting device.

  The vehicle body front part structure of the present invention according to claim 5 improves the accuracy of the assembly position of the vehicle mounting device to the vehicle body.

  In the vehicle body front structure according to the sixth aspect of the present invention, a part of the load inputted to the front side member can be effectively distributed to the front pillar and the connecting member connecting means.

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

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

  As shown in FIG. 1, the left and right front pillars 12, 14 in the vehicle body front portion 10 of the present embodiment are arranged with their longitudinal directions along the vehicle body vertical direction. Further, the front pillar 12 on the left side of the vehicle body includes a front pillar outer panel 16 that constitutes the outer side portion of the front pillar 12 in the vehicle width direction, and a front pillar inner panel 18 that constitutes the inner side portion of the front pillar 12 in the vehicle width direction. It has a closed cross-sectional structure. Similarly, the front pillar 12 on the right side of the vehicle body includes a front pillar outer panel 20 that constitutes an outer portion in the vehicle width direction of the front pillar 14, and a front pillar inner panel 22 that constitutes an inner portion in the vehicle width direction of the front pillar 14. And has a closed cross-sectional structure.

  An instrument panel reinforcement 24 as an instrument panel reinforcing member, which is a front pillar connecting member, is disposed between the left and right front pillars 12 and 14 along the longitudinal direction of the instrument panel. The instrument panel reinforcement 24 is made of a pipe material, a round bar, or the like, and mounting brackets 24A and 24B are attached to both ends in the vehicle width direction. The mounting bracket 24A on the left side of the vehicle body is fixed to the inner surface 18A in the vehicle width direction of the front pillar inner panel 18 by a fixing member 26 such as a bolt. Similarly, the mounting bracket 24B on the right side of the vehicle body is fixed to the inner surface 22A in the vehicle width direction of the front pillar inner panel 22 by a fixing member 26 such as a bolt.

  Further, left and right front side members 30 and 32 are arranged in the vehicle body front portion 10 along the longitudinal direction of the vehicle body. A front portion 30A of the front side member 30 on the left side of the vehicle body includes a front side member upper panel 34 that constitutes the upper side of the front side member 30 in the vertical direction of the vehicle, and a front side that constitutes the lower side of the front side member 30 in the vertical direction of the vehicle body. And a member under panel 36.

  The front side member upper panel 34 is formed of a pressed plate material or the like, and side wall portions 34B and 34C are provided upright from both ends in the vehicle width direction of the lower wall portion 34A toward the vehicle body. Further, the front side member under panel 36 is also made of a pressed plate material or the like, and side wall portions 36B and 36C are erected from both ends in the vehicle width direction of the lower wall portion 36A toward the vehicle body. The vertical width of the front side member under panel 36 is larger than the vertical width of the front side member upper panel 34, and the front side member upper panel 34 is disposed inside the upper portion of the front side member under panel 36. Further, the side wall portions 34B, 34C of the front side member upper panel 34 and the upper portions of the side wall portions 36B, 36C of the front side member under panel 36 are joined together by welding or the like, and the front side member 30 has a closed cross-sectional structure. ing.

  Similarly, a front portion 32A of the front side member 32 on the right side of the vehicle body constitutes a front side member upper panel 38 that constitutes an upper side portion of the front side member 32 in the vertical direction of the vehicle body, and a lower side portion of the front side member 32 in the vertical direction of the vehicle body. And a front side member under panel 40 that has a closed cross-sectional structure.

  As shown in FIG. 3, a rear portion 30C extends obliquely downward and rearward of the vehicle body from the rear end portion 30B of the front portion 30A of the front side member 30, and the rear end portion 32B of the front portion 32A of the front side member 32 is shown. The rear portion 32C extends obliquely downward from the rear of the vehicle body. Therefore, a part of the load (arrow F1 in FIGS. 1 and 3) input to the left and right front side members 30 and 32 from the front side of the vehicle body to the rear side of the vehicle body is a rear portion 30C of the left and right front side members 30 and 32. , 32C is transmitted to the lower part of the vehicle body (arrow F2 in FIGS. 1 and 3).

  As shown in FIG. 1, left and right flanges 30D are formed on the rear end 30B of the front portion 30A of the front side member 30 toward the outer side in the vehicle width direction (the flange on the right side of the vehicle body is not shown). These flanges 30 </ b> D are fixed to the lower front portion of the vertical wall portion 44 </ b> A of the dash panel 44. Similarly, left and right flanges 32D are formed on the rear end portion 32B of the front portion 32A of the front side member 32 toward the outside in the vehicle width direction (the right-side flange is not shown), and these flanges 32D. Is fixed to the lower part of the front surface of the vertical wall portion 44 </ b> A of the dash panel 44.

  As shown in FIG. 3, left and right flanges 30 </ b> E are formed on the upper portion of the rear portion 30 </ b> C of the front side member 30 toward the outer side in the vehicle width direction. These flanges 30E are formed continuously with the flange 30D, and these flanges 30E are fixed to the lower surface of the inclined portion 44B formed from the lower end portion of the vertical wall portion 44A of the dash panel 44 toward the rear lower side of the vehicle body. Has been. Similarly, left and right flanges 32E are formed on the upper portion of the rear portion 32C of the front side member 32 toward the outer side in the vehicle width direction. These flanges 32E are formed continuously with the flange 32D, and these flanges 32E are fixed to the lower surface of the inclined portion 44B formed from the lower end portion of the vertical wall portion 44A of the dash panel 44 toward the rear lower side of the vehicle body. Has been.

  As shown in FIG. 3, in the vicinity of the upper portion of the connecting portion of the dash panel 44 to the front side members 30 and 32, a recess 48 that protrudes toward the rear of the vehicle body by press molding or the like is formed. The longitudinal direction is arranged along the vehicle width direction. The ceiling 48A of the recess 48 is inclined from the upper front side of the vehicle body toward the lower rear side of the vehicle body, and the lower wall portion 48B of the recess 48 is inclined from the lower front side of the vehicle body toward the upper rear side of the vehicle body. The rear wall 48C of the recess 48 is a vertical wall extending in the vehicle body vertical direction, and a part (rear part) of a steering gear box (case constituting the steering gear) 50 from the front side of the vehicle body is formed in the recess 48. ) Is stored.

  As shown in FIG. 1, the steering gear box 50 is arranged with its longitudinal direction along the vehicle width direction. Further, the vehicle width direction left end portion 50A of the steering gear box 50 reaches the vicinity of the vehicle width direction inner side surface 18A of the front pillar inner panel 18, and the vehicle width direction right end portion 50B is the vehicle width direction of the front pillar inner panel 22. It has reached the vicinity of the inner side surface 22A. A bracket 52 is attached in the vicinity of the left end portion 50A in the vehicle width direction of the steering gear box 50, and the bracket 52 is also attached in the vicinity of the right end portion 50B in the vehicle width direction of the steering gear box 50.

  As shown in FIG. 3, the gear box support portion 52 </ b> A in the bracket 52 has a cylindrical shape, and the gear box support portion 52 </ b> A supports the outer peripheral portion of the steering gear box 50. A band-shaped mounting portion 52B projects from the gear box support portion 52A of the bracket 52 toward the front of the vehicle body. The mounting portion 52B of the bracket 52 on the left side of the vehicle body is the upper wall portion 30F of the front side member 30 on the left side of the vehicle body. It is attached to the upper surface of (the lower wall portion 34A of the front side member upper panel 34). Here, a bolt 54 as a fixing member that penetrates the mounting portion 52B of the bracket 52 and the upper wall portion 30F of the front side member 30 (the lower wall portion 34A of the front side member upper panel 34) from above the vehicle body is provided on the front side. The mounting portion 52B of the bracket 52 on the left side of the vehicle body is fixed to the upper surface of the upper wall portion 30F of the front side member 30 on the left side of the vehicle body by screwing into a nut 56 disposed on the lower side of the upper wall portion 30F of the member 30. ing.

  Similarly, as a fixing member that penetrates the mounting portion 52B of the bracket 52 on the right side of the vehicle body and the upper wall portion 32F (the lower wall portion 38A of the front side member upper panel 38) of the front side member 32 on the right side of the vehicle body from above the vehicle body. The bolt 54 is screwed into a nut 56 disposed on the lower side of the upper wall portion 32F of the front side member 32, so that the mounting portion 52B of the bracket 52 on the right side of the vehicle body becomes the upper wall of the front side member 32 on the right side of the vehicle body. It is being fixed to the upper surface of the part 32F.

  A dash cross member 60 is disposed on the rear side of the vehicle body of the recess 48 of the dash panel 44 along the longitudinal direction of the dash cross member 60. The dash cross member 60 is formed of a pressed plate material or the like. Yes. The ceiling portion 60A of the dash cross member 60 is inclined from the upper front side of the vehicle body toward the lower rear side of the vehicle body, and the lower wall portion 60B of the dash cross member 60 is inclined from the lower front side of the vehicle body toward the upper rear side of the vehicle body. . The rear wall portion 60C of the dash cross member 60 is a vertical wall portion that extends in the vertical direction of the vehicle body. Further, the front end portions of the ceiling portion 60A and the lower wall portion 60B of the dash cross member 60 are coupled to the rear end portions of the ceiling portion 48A and the lower wall portion 48B of the recess portion 48 of the dash panel 44 from the outside of the recess portion 48, respectively. The dash cross member 60 forms a closed cross-section structure 62 with the dash panel 44.

  As shown in FIG. 2, both end portions 60 </ b> E and 60 </ b> F of the dash cross member 60 are arranged in the vehicle width direction inner side surface 18 </ b> A of the front pillar inner panel 18 and the vehicle width direction inner side surface 22 </ b> A of the front pillar inner panel 22. Is bound to.

  As shown in FIG. 1, brackets 66 are attached to the steering gear box 50 near the inner sides in the vehicle width direction of the left and right brackets 52, respectively. The gear box support portion 66 </ b> A in the bracket 66 has a cylindrical shape, and the gear box support portion 66 </ b> A supports the outer peripheral portion of the steering gear box 50. From the gear box support portion 66A of the bracket 66, a band-like attachment portion 66B is formed so as to protrude upward from the vehicle body.

  As shown in FIG. 2, the instrument panel reinforcement 24 and the steering gear box 50 are connected to each other by left and right instrument panel dash braces 70 as connecting member connecting means. In plan view, the left and right instrument panel dash braces 70 are arranged in parallel to each other along the vehicle longitudinal direction on the inner side in the vehicle width direction of the left and right front side members 30 and 32.

  As shown in FIG. 4, the left and right instrument panel dash braces 70 are inclined from the lower front side of the vehicle body toward the upper rear side of the vehicle body in a side view.

  As shown in FIG. 3, the rear end portions 30B, 32B of the front side members 30, 32 are obliquely rearward and downward with respect to the longitudinal direction of the vehicle body, which is the axial direction of the front portions 30A, 32A of the front side members 30, 32. The inclination angle θ1 of the instrument panel and the inclination angle θ2 of the instrument panel dash brace 70 obliquely upward and rearward of the vehicle body are substantially equal (may be equal). As a result, the load acting on the front portions 30A, 32A of the front side members 30, 32 from the front of the vehicle body to the rear of the vehicle body is effectively applied to the rear end portions 30B, 32B of the front side members 30, 32 and the instrument panel dash brace 70. Can be dispersed.

  The instrument panel dash brace 70 is formed of a pipe material having a circular cross section, and the opening peripheral edge portion of the upper end portion (rear end portion) 70A is welded to the front lower portion of the outer peripheral portion 24C of the instrument panel reinforcement 24 or the like. Are combined. A front wall portion 70 </ b> C that closes the opening is formed at the lower end portion (front end portion) 70 </ b> B of the instrument panel dash brace 70.

  The attachment portions 66B of the left and right brackets 66 attached to the steering gear box 50, the vertical wall portion 44A of the dash panel 44, and the front wall portion 70C of the left and right instrument panel dash brace 70 overlap in the vehicle body longitudinal direction. Further, a bolt 74 as a fixing member penetrates through the mounting portion 66B of the left and right brackets 66, the vertical wall portion 44A of the dash panel 44, and the front wall portion 70C of the left and right instrument panel dash braces 70 from the front side of the vehicle body. ing. The bolt 74 is screwed into a nut 76 fixed to the rear side of the vehicle body of the front wall portion 70C of the instrument panel dash brace 70, and the front wall portion 70C of the left and right instrument panel dash braces 70 is a vertical wall portion of the dash panel 44. It is fixed to the attachment portions 66B of the left and right brackets 66 across 44A.

  Accordingly, a part of the load (arrow F1 in FIGS. 1 to 3) inputted to the left and right front side members 30, 32 from the front side of the vehicle body to the rear side of the vehicle body is part of the left and right front side members 30, 32, steering gear. Box 50 (arrow F3 in FIG. 1), left and right instrument panel dash brace 70 (arrow F4 in FIG. 1), instrument panel reinforcement 24 (arrow F5 in FIG. 1), left and right front pillars 12 and 14 (arrow F6 in FIG. 1) ) In this order, and is transmitted to the upper part of the vehicle body by the left and right front pillars 12 and 14.

  Further, as shown in FIG. 2, some of the loads input from the front side of the vehicle body to the rear side of the vehicle body by the dash cross member 60 are also applied to the left and right front pillars 12 and 14 (see FIG. 2 is transmitted to the arrow F7).

  As shown in FIG. 4, the upper portion 70D of the front wall portion 70C of the instrument panel dash brace 70 is a vertical wall portion extending in the vertical direction of the vehicle body, and is in contact with the rear surface 44C of the vertical wall portion 44A of the dash panel 44. . Further, the lower portion 70E of the front wall portion 70C of the instrument panel dash brace 70 is an inclined wall inclined from the upper front side of the vehicle body to the lower rear side of the vehicle body, and the upper surface 48D of the ceiling portion 48A in the concave portion 48 of the dash panel 44, The cross member 60 is in contact with the upper surface 60D of the ceiling 60A.

  The rear surface 44C of the vertical wall portion 44A of the dash panel 44 is a positioning means in the vehicle body longitudinal direction of the instrument panel dash brace 70, and the upper surface 48D of the ceiling portion 48A and the dash cross member 60 in the recess 48 of the dash panel 44. The upper surface 60D of the ceiling portion 60A serves as a positioning means for the instrument panel dash brace 70 in the vertical direction of the vehicle body. For this reason, when assembling the left and right instrument panel dash braces 70 attached to the instrument panel reinforcement 24 (instrument panel) to the steering gear box 50 (vehicle body) with the dash panel 44 interposed therebetween by these positioning means, The left and right instrument panel dash braces 70 can be easily positioned in the longitudinal direction of the vehicle body and in the vertical direction of the vehicle body.

  Further, the mounting portion 66B of the bracket 66 that is a vertical wall portion extending in the vertical direction of the vehicle body is in contact with the upper portion 70D of the front wall portion 70C of the instrument panel dash brace 70 with the vertical wall portion 44A of the dash panel 44 interposed therebetween. The ceiling portion 48A in the recess 48 of the dash panel 44 and the ceiling portion 60A of the dash cross member 60, which are inclined walls inclined from the upper front side of the vehicle body to the lower rear side of the vehicle body, are the lower part of the front wall portion 70C of the instrument panel dash brace 70. Since it is in contact with 70E, the lower end portion (front end portion) 70B of the instrument panel dash brace 70 can be prevented from moving forward or downward relative to the steering gear box 50 during load transmission.

  As shown in FIG. 1, an air conditioner unit 80 as a vehicle mounting device is disposed between the left and right instrument panel dash braces 70. The vehicle mounting device is a device mounted in an instrument panel such as an air conditioner unit 80, an air bag device, or a meter.

  As shown in FIG. 3, the air conditioner unit 80 is attached to the left and right instrument panel dash braces 70 by brackets 82 fixed to the left and right side wall portions 80A. Therefore, the left and right instrument panel dash braces 70 attached to the instrument panel reinforcement 24 (instrument panel) are assembled to the steering gear box 50 (vehicle body) by the bracket 66, and at the same time, the air conditioner unit 80 is assembled to the vehicle body. It has become.

  The air conditioner unit 80 is disposed on the vehicle body rear side (vehicle compartment side) of the dash panel 44 together with the instrument panel reinforcement 24 and the left and right instrument panel dash braces 70.

  As shown in FIG. 1, left and right tie rods 86 extend from left and right center portions 50C of the steering gear box 50 toward left and right front wheels (not shown), and the steering gear box 50 and left and right tie rods 86 are It is disposed above the left and right front side members 30 and 32. A steering shaft 88 is connected to the gear portion 50D of the steering gear box 50 disposed in the middle portion between the bracket 52 on the right side of the vehicle body and the bracket 66, and the steering shaft 88 is connected to the vertical wall portion 44A of the dash panel 44. The through-hole 90 formed in is inserted into the steering handle 91 and extends.

  Next, the operation of this embodiment will be described.

  In the present embodiment, when a frontal collision of the vehicle, that is, when another vehicle or the like collides from the front of the vehicle body, the load input to the left and right front side members 30 and 32 from the vehicle body front side to the vehicle body rear side (FIG. 1). 3 is transmitted to the lower part of the vehicle body (arrow F2 in FIGS. 1 and 3) along the rear portions 30C and 32C of the left and right front side members 30 and 32.

  In the present embodiment, the instrument panel reinforcement 24 that connects the left and right front pillars 12 and 14 to each other and the steering gear box 50 that connects the left and right front side members 30 and 32 to each other include the left and right instrument panel dash braces 70. Are connected to each other. As a result, a part of the load (arrow F1 in FIGS. 1 to 3) inputted to the left and right front side members 30, 32 from the front side of the vehicle body to the rear side of the vehicle body is part of the left and right front side members 30, 32, steering. Gear box 50 (arrow F3 in FIG. 1), left and right instrument panel dash brace 70 (arrow F4 in FIG. 1), instrument panel reinforcement 24 (arrow F5 in FIG. 1), left and right front pillars 12, 14 (arrow in FIG. 1) F6) and transmitted to the upper part of the vehicle body by the left and right front pillars 12 and 14.

  As a result, in the vehicle body front structure of the present embodiment, the load F1 input to the front side members 30 and 32 from the front of the vehicle can be effectively distributed in the vertical direction of the vehicle like F2 to F7. For this reason, the compression deformation of the front side members 30 and 32 in the longitudinal direction of the vehicle body is stabilized, and the collision energy can be sufficiently absorbed by the compression deformation, so that the deformation of the passenger compartment can be suppressed.

  In the present embodiment, the rear end portions 30B, 32B of the front side members 30, 32 are obliquely rearward and downward with respect to the vehicle longitudinal direction, which is the axial direction of the front portions 30A, 32A of the front side members 30, 32. The inclination angle θ1 of the instrument panel and the inclination angle θ2 of the instrument panel dash brace 70 obliquely upward and rearward of the vehicle body are substantially equal (may be equal). As a result, the load acting on the front portions 30A, 32A of the front side members 30, 32 from the front of the vehicle body to the rear of the vehicle body is effectively applied to the rear end portions 30B, 32B of the front side members 30, 32 and the instrument panel dash brace 70. Can be dispersed.

  Further, in the present embodiment, the mounting portion 66B of the bracket 66, which is a vertical wall portion extending in the vertical direction of the vehicle body, is formed on the upper portion 70D of the front wall portion 70C of the instrument panel dash brace 70 across the vertical wall portion 44A of the dash panel 44. The ceiling portion 48A in the recess 48 of the dash panel 44 and the ceiling portion 60A of the dash cross member 60 are in front of the instrument panel dash brace 70. It is in contact with the lower portion 70E of the wall portion 70C. As a result, it is possible to prevent the lower end portion (front end portion) 70B of the instrument panel dash brace 70 from moving forward or downward relative to the steering gear box 50 during load transmission. For this reason, the load can be reliably transmitted from the steering gear box 50 to the instrument panel dash brace 70.

  In the present embodiment, the left and right front side members 30, 32 are connected by the steering gear box 50, so there is no need to separately provide a front side member connecting member that increases the weight. As a result, the number of parts can be reduced and the load F1 input to the front side members 30 and 32 from the front of the vehicle body can be effectively increased in the vertical direction of the vehicle body, such as F2 to F7, while suppressing a significant increase in the vehicle body weight. Can be distributed.

  In this embodiment, since the front pillar connecting member is the instrument panel reinforcement 24, it is not necessary to provide the front pillar connecting member as a separate part, and the number of parts can be further reduced.

  In the present embodiment, the dash cross member 60 that is coupled to the rear side of the steering gear box 50 and connects the left and right front pillars 12 and 14 to the left and right front side members 30 and 32 from the front side of the vehicle body is also provided. Part of the load input toward the rear side can be transmitted to the left and right front pillars 12 and 14 (arrow F7 in FIG. 2). Accordingly, the load F1 input to the left and right front side members 30 and 32 can be more effectively distributed in the vertical direction of the vehicle body as F2 to F7.

  Further, since the dash cross member 60 is arranged along the vehicle width direction on the rear side of the vehicle body of the steering gear box 50 so as to avoid the through hole 90 formed in the vertical wall portion 44A of the dash panel 44 through which the steering shaft 88 is inserted, the through hole is formed. The dash cross member 60 can suppress the strength reduction of the vertical wall portion 44 </ b> A of the dash panel 44 caused by forming the hole 90.

  In the present embodiment, the air conditioning unit 80 is attached to the left and right instrument panel dash braces 70 arranged on the inner side in the vehicle width direction of the left and right front side members 30 and 32, so that the instrument panel reinforcement 24 (instrument panel) is attached. The attached left and right instrument panel dash brace 70 can be assembled to the steering gear box 50 (vehicle body), and at the same time, the air conditioner unit 80 can be assembled to the vehicle body. For this reason, the assembly | attachment property to the vehicle body of the air-conditioner unit 80 improves.

  Further, since the air conditioner unit 80 can be supported by the instrument panel reinforcement 24 and the steering gear box 50 via the left and right instrument panel dash braces 70, the movement of the air conditioner unit 80 to the rear of the vehicle body at the time of a vehicle front collision can be suppressed. Intrusion into the room can be prevented.

  Further, since the air conditioner unit 80 can be supported by the instrument panel reinforcement 24 and the steering gear box 50 via the left and right instrument panel dash braces 70, the support rigidity of the air conditioner unit 80 is improved.

  In the present embodiment, the rear surface 44C of the vertical wall portion 44A of the dash panel 44 serves as a positioning means in the vehicle body longitudinal direction of the instrument panel dash brace 70, and the upper surface 48D of the ceiling portion 48A in the recess 48 of the dash panel 44 The upper surface 60D of the ceiling portion 60A of the dash cross member 60 serves as positioning means for the instrument panel dash brace 70 in the vehicle body vertical direction. As a result, when the left and right instrument panel dash braces 70 attached to the instrument panel reinforcement 24 (instrument panel) are assembled to the steering gear box 50 (vehicle body) with the dash panel 44 interposed therebetween, the left and right instrument panel dash braces 70 At the same time as positioning in the longitudinal direction of the vehicle body and in the vertical direction of the vehicle body, positioning of the air conditioner unit 80 attached to the left and right instrument panel dash brace 70 is performed in the longitudinal direction of the vehicle body and in the vertical direction of the vehicle body. For this reason, the assembly position accuracy of the air conditioner unit 80 to the vehicle body is improved.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art.

  For example, in the above-described embodiment, the vehicle width direction both end portions 50A and 50B of the steering gear box 50 may be coupled to the front pillars 12 and 14, respectively. In this case, the instrument panel dash brace 70 is arranged on the inner side in the vehicle width direction of the front side members 30 and 32, so that the front pillars 12 and 14 and the instrument panel dash brace 70 are connected to each other through the steering gear box 50. The side members 30 and 32 can be supported from both sides in the vehicle width direction. As a result, a part of the load input to the front side members 30 and 32 from the front side of the vehicle body to the rear side of the vehicle body is effective for both the front pillars 12 and 14 and the instrument panel dash brace 70 via the steering gear box 50. Can be dispersed.

  Further, the lower portion 70E of the front wall portion 70C of the instrument panel dash brace 70, which is an inclined wall inclined from the upper front side of the vehicle body to the lower rear side of the vehicle body, the ceiling portion 48A of the concave portion 48 of the dash panel 44, and the dash cross member 60 By inclining the ceiling portion 60 </ b> A at an angle orthogonal to the axis K (see FIG. 4) of the instrument panel dash brace 70, the load is effectively transmitted from these inclined walls in the axis direction of the instrument panel dash brace 70 during load transmission. It is good also as a structure transmitted to.

  In the above embodiment, the instrument panel reinforcement 24 is used as the front pillar coupling member. However, the front pillar coupling member is not limited to the instrument panel reinforcement 24 and is a member that couples the left and right front pillars 12 and 14 to each other. I just need it.

  In the above embodiment, the left and right instrument panel dash braces 70 as connecting member connecting means are arranged inside the left and right front side members 30 and 32 in the vehicle width direction. It is good also as a structure arrange | positioned on the extension line to the vehicle body back of the side members 30 and 32. FIG. Alternatively, the left and right instrument panel dash braces 70 may be arranged outside the left and right front side members 30 and 32 in the vehicle width direction.

  Moreover, in the said embodiment, although two instrument panel dash braces 70 as a connection member connection means are arrange | positioned, it is good also as a structure which has arrange | positioned one or three or more instrument panel dash braces 70. FIG.

  In the above embodiment, the dash cross member 60 that connects the left and right front pillars 12 and 14 to each other is disposed on the rear side of the vehicle body of the steering gear box 50. However, the dash cross member 60 may be omitted.

  Moreover, in the said embodiment, although the air-conditioner unit 80 as a vehicle mounting apparatus was attached to the instrument panel dash brace 70, it is good also as a structure which attached other vehicle mounting apparatuses, such as an airbag apparatus and a meter, to the instrument panel dash brace 70.

  Further, in the above embodiment, the rear surface 44C of the vertical wall portion 44A of the dash panel 44 is used as the vehicle body longitudinal direction positioning means of the instrument panel dash brace 70, and the upper surface 48D of the ceiling portion 48A and the dash cross member 60 in the recess 48 of the dash panel 44 The upper surface 60D of the ceiling portion 60A of the instrument panel dash brace 70 is used as a positioning means for the instrument panel dash brace 70 in the vertical direction of the vehicle body, but at the connecting portion between the steering gear box 50 and the instrument panel dash brace 70, The positioning means for positioning with the direction may have another configuration.

It is the perspective view seen from the vehicle body left diagonal front which shows the vehicle body front part structure which concerns on one Embodiment of this invention. It is an expanded sectional view along line 2-2 in FIG. FIG. 3 is an enlarged cross-sectional view taken along line 3-3 in FIG. 2. FIG. 4 is an enlarged cross-sectional view taken along line 4-4 of FIG.

Explanation of symbols

10 Car body front part 12 Front pillar 14 Front pillar 24 Instrument panel reinforcement (front pillar connecting member, instrument panel reinforcing member)
30 front side member 32 front side member 44 dash panel 44A vertical wall portion of dash panel 44C rear surface of vertical wall portion of dash panel (positioning means)
48 Recessed portion of dash panel 48A Ceiling portion of recessed portion 48D Top surface of ceiling portion of recessed portion (positioning means)
50 Steering gear box 52 Bracket 60 Dash cross member 66 Bracket 70 Instrument panel dash brace (connecting member connecting means)
80 Air-conditioning unit (vehicle-mounted device)

Claims (6)

Left and right front side members whose longitudinal direction is arranged along the longitudinal direction of the vehicle body at the front part of the vehicle body and whose rear part extends downward of the vehicle body,
Left and right front pillars arranged in the longitudinal direction of the vehicle body in the longitudinal direction on the outside in the vehicle width direction of the left and right front side members;
A steering gear box that is arranged along the vehicle width direction in the longitudinal direction and connects the left and right front side members to each other;
A front pillar connecting member that is disposed along the vehicle width direction in the longitudinal direction and connects the left and right front pillars to each other;
Connecting member connecting means for connecting the steering gear box and the front pillar connecting member to each other;
The vehicle body front part structure characterized by having.   The vehicle body front part structure according to claim 1, wherein the front pillar connecting member is an instrument panel reinforcing member.   The vehicle body front part structure according to any one of claims 1 and 2, further comprising a dash cross member disposed on a vehicle body rear side of the steering gear box and connecting the left and right front pillars to each other.   The vehicle body front part structure according to any one of claims 1 to 3, wherein a vehicle mounting device is attached to the connecting member connecting means.   5. The vehicle body front structure according to claim 4, further comprising positioning means for positioning the connecting member connecting means in the vehicle longitudinal direction and the vehicle vertical direction at a connecting portion between the steering gear box and the connecting member connecting means. .   The both ends of the steering gear box in the vehicle width direction are coupled to the left and right front pillars, and the connecting member coupling means is disposed on the inner side in the vehicle width direction of the left and right front side members. The vehicle body front structure according to any one of the preceding claims.

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