JP5063288B2 - Body front structure - Google Patents

Description

  The present invention relates to a vehicle body front portion structure including a front subframe below right and left front side frames.

Some vehicle body structures are known in which a reinforcing plate is arranged from the rear suspension arm to the front floor panel and side sill, and this reinforcing plate is attached to a rigid structure (front floor panel, side sill and tunnel member) ( For example, see Patent Document 1.)
JP 2006-213204 A

According to this vehicle body structure, when an impact load is applied from the rear to the front of the vehicle body, the impact load can be supported by the reinforcing plate attached to the highly rigid structure.
Thereby, the displacement of the rear suspension arm can be suppressed, and the amount of change in the alignment with respect to the rear suspension (the attachment angle of the tire with respect to the vehicle body) can be suppressed.

By the way, in the vehicle body front structure constituting the front part of the vehicle body structure, the front side frame rear end extends from the rear end portion of the left and right front side frames toward the rear of the vehicle body, and the left and right front side frames and Some have a front subframe below the rear end of the front side frame.
It is conceivable to secure the rigidity of the vehicle body front structure by applying the reinforcing plate of Patent Document 1 to the vehicle body front structure.

Here, when an impact load acts rearward from the front of the vehicle body, the impact load is transmitted to the rear of the vehicle body via the left and right front side frames and the front subframe.
On the other hand, the reinforcing plate of Patent Document 1 secures the rigidity of the reinforcing plate by being attached to a highly rigid structure (front floor panel, side sill or tunnel member).

However, the side sills and tunnel members, which are highly rigid structures, are arranged at positions offset from the left and right front side frames and the left and right side frames.
For this reason, when an impact load is applied from the front to the rear of the vehicle body, it is difficult to efficiently support the applied impact load with the reinforcing plate.

  An object of the present invention is to provide a vehicle body front part structure that can efficiently absorb an applied impact load when an impact load is applied rearward from the front part of the vehicle body.

In the first aspect of the invention, the left and right rear frames extend from the rear ends of the left and right front side frames toward the rear of the vehicle body, and the rear ends of the left and right front side frames extend outward in the vehicle width direction. extending the right and left side sills towards the rear of the vehicle body from the left and right outriggers with left and right outriggers are flared, the fastening portion of the front and rear description of front subframe in the front side and rear frames of the right and left of the left and right In the front structure of the vehicle body attached from the lower side of the vehicle body , the left front end is fastened to the left rear fastening portion of the front subframe from the lower side of the vehicle body, and the left rear end portion is connected to the left side sill from below the vehicle body. and entered into left load transmission member, the lower right front portion in the right rear fastening portion of the vehicle body of the front sub-frame With the al fastened, and right load transmission member rear right corner to the right side sill is fastened from below the vehicle body, left load on the left side sill in a state passed bridged between the left side sill and the right side sill A cross member fastened together with the transmission member from below the vehicle body, fastened together with the right side sill together with the right load transmission member from below the vehicle body, and fastened to the left and right rear frames from below the vehicle body. The cross member has a left connecting portion that connects the left side sill and the left rear frame, and a right connecting portion that connects the right side sill and the right rear frame,
The left load transmitting member, the left connecting portion and the left rear frame form a substantially triangular left rigid region, and the right load transmitting member, the right connecting portion and the right rear frame form a substantially triangular right rigid region. It is formed.

In the invention according to claim 1, the left front end of the left load transmission member is attached to the left rear fastening portion of the front subframe, and the left rear end of the left load transmission member is attached to the left side sill.
Similarly, the right front end portion of the right load transmission member was attached to the right rear fastening portion of the front subframe, and the right rear end portion of the right load transmission member was attached to the right side sill.
As a result, when an impact load is applied from the front of the vehicle body to the rear, the applied impact load can be distributed to the left and right side sills via the left and right load transmission members.

Furthermore, a cross member was passed between the left side sill and the right side sill and attached to the left and right rear frames.
Thereby, the rigidity of the front floor panel attached between the left and right side sills can be increased by the cross member.

In addition, the left side sill and the left rear frame are connected at the left connecting portion of the cross member, and a substantially triangular left rigid region is formed by the left load transmitting member, the left connecting portion, and the left rear frame.
Similarly, the right side sill and the right rear frame were connected at the right connecting portion of the cross member to form a substantially triangular right rigid region at the right load transmitting member, the right connecting portion, and the right rear frame.

Therefore, the left rigid region can be formed behind the left rear fastening portion of the front subframe, and the right rigid region can be formed behind the right rear fastening portion.
As a result, when an impact load is applied from the front of the vehicle body toward the rear, the applied impact load can be efficiently distributed to the rear of the vehicle through the left and right rigid regions.

In addition, a left rigid region is formed behind the left rear fastening portion of the front subframe, and a right rigid region is formed behind the right rear fastening portion, so that the impact load applied to the front portion of the vehicle body can be applied to the front subframe. It is possible to prevent the rear fastening portion from being displaced toward the rear of the vehicle body.
In this way, by suppressing the displacement of the rear fastening portion of the front subframe, it is possible to suppress the amount of change in the alignment with respect to the front suspension (the mounting angle of the tire with respect to the vehicle body).

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that “front”, “rear”, “left”, and “right” indicate the direction viewed from the driver, the front side is Fr, the rear side is Rr, the left side is L, and the right side is R.

FIG. 1 is a view showing a state of a vehicle body front structure according to the present invention (first embodiment) as viewed from the bottom surface side, and FIG. 2 is a view of the vehicle body front structure according to the first embodiment as viewed from the bottom surface side. FIG.
The vehicle body front structure 10 extends from the left and right front side frames 11 and 12 disposed in the longitudinal direction of the vehicle body and from the rear end portions 11a and 12a of the left and right front side frames 11 and 12 toward the rear of the vehicle body. Left and right rear frames 13, 14; left and right outriggers 15, 16 projecting outward from the rear end portions 11a, 12a of the left and right front side frames 11, 12 toward the vehicle body width direction; and left and right outriggers The left and right side sills 17 and 18 respectively extend toward the rear of the vehicle body from 15 and 16, and the front floor panel 19 attached between the left and right side sills 17 and 18.

  The left rear frame 13 includes a left front side frame rear end 21 extending toward the rear of the vehicle body from the rear end portion 11a of the left front side frame 11, and a rear end portion 21a of the left front side frame rear end 21 toward the rear of the vehicle body. And a left floor frame 22 extending respectively.

  The right rear frame 14 includes a right front side frame rear end 24 that extends from the rear end 12a of the right front side frame 12 toward the rear of the vehicle body, and a rear end 24a of the right front side frame rear end 24 that extends toward the rear of the vehicle body. And a right floor frame 25 respectively extending.

  Further, the vehicle body front structure 10 includes a front subframe 30 attached to the left and right front side frames 11 and 12 and the left and right front side frames rear ends 21 and 24, and a left rear fastening portion (rear fastening portion) of the front subframe 30. ) 31 and the left load sill 17 connecting the left side sill 17, the right rear fastening part (rear fastening part) 32 of the front subframe 30 and the right load transmitting member 36 connecting the right side sill 18, and the left side sill 17 left A cross member 40 is provided between the attachment portion 38 and the right attachment portion 39 of the right side sill 18.

The left front side frame rear end 21 extends from the rear end portion 11a of the left front side frame 11 toward the rear of the vehicle body, and the left floor frame 22 extends from the rear end portion 21a of the left front side frame rear end 21 toward the rear of the vehicle body. It has been extended.
Therefore, the left front side frame 11, the left front side frame rear end 21 and the left floor frame 22 are connected in a substantially linear shape.

The right front side frame rear end 24 extends from the rear end portion 12a of the right front side frame 12 toward the rear of the vehicle body, and the right floor frame 25 extends from the rear end portion 24a of the right front side frame rear end 24 toward the rear of the vehicle body. It has been extended.
Therefore, the right front side frame 12, the right front side frame rear end 24, and the right floor frame 25 are connected substantially linearly.

A left outrigger 15 projects from the rear end portion 11a of the left front side frame 11 outward in the vehicle width direction, and a left side sill 17 extends from the end portion 15a of the left outrigger 15 toward the rear of the vehicle body.
Therefore, the left side sill 17 is disposed substantially parallel to the left front side frame rear end 21 and the left floor frame 22 with a predetermined distance L.

A right outrigger 16 projects from the rear end portion 12a of the right front side frame 12 outward in the vehicle width direction, and a right side sill 18 extends from the end portion 16a of the right outrigger 16 toward the rear of the vehicle body.
Therefore, the right side sill 18 is disposed substantially parallel to the right front side frame rear end 24 and the right floor frame 25 with a predetermined distance L.

The front sub-frame 30 includes left and right sub-side frames 41 and 42 disposed in the longitudinal direction of the vehicle body, and a front cross disposed between the left and right sub-side frames 41 and 42 and attached to the front end portions 41a and 42a. A member 43 and a rear cross member 44 disposed between the left and right sub-side frames 41 and 42 and attached to the respective rear end portions 41b and 42b are provided.
The front subframe 30 is formed in a substantially rectangular frame body by left and right subside frames 41 and 42 and front and rear cross members 43 and 44.

The left sub-side frame 41 is formed in a gently curved shape along the left front side frame 11.
The left sub-side frame 41 is attached with a left front fastening portion (front fastening portion) 33 attached to the front end portion 11 b of the left front side frame 11 with a bolt 49 and a bolt 51 near the front end portion 21 b of the left front side frame rear end 21. The left rear fastening part 31 is provided.

The right sub-side frame 42 is formed in a gently curved shape along the right front side frame 12.
The right sub-side frame 42 is attached by a bolt 57 near the right front fastening portion (front fastening portion) 34 attached to the front end portion 12b of the right front side frame 12 by a bolt 50 and the front end portion 24b of the right front side frame rear end 24. And a right rear fastening portion 32.

  The left load transmission member 35 is attached to the straight left arm 46 disposed between the left rear fastening portion 31 of the front subframe 30 and the left side sill 17 and the left rear fastening portion 31 of the front subframe 30 with a bolt 51. The left front end 47 and the left rear end 48 attached to the left attachment portion 38 of the left side sill 17 with a bolt 52 are provided.

The bolt 51 is a member that fastens the left front end portion 47 and the left rear fastening portion 31 near the front end portion 21 b of the left front side frame rear end 21.
The bolt 52 is a member that fastens the left rear end portion 48 and the left end portion 61 of the cross member 40 together with the left attachment portion 38 of the left side sill 17.

  The right load transmission member 36 is attached by a bolt 57 to the straight right arm 54 disposed between the right rear fastening portion 32 of the front subframe 30 and the right side sill 18 and the right rear fastening portion 32 of the front subframe 30. A right front end portion 55 of the right arm 54 and a right rear end portion 56 attached to the right attachment portion 39 of the right side sill 18 with a bolt 58.

The bolt 57 is a member that fastens the right front end portion 55 and the right rear fastening portion 32 in the vicinity of the front end portion 24 b of the right front side frame rear end 24.
The bolt 58 is a member that fastens the right rear end portion 56 and the right end portion 62 of the cross member 40 together with the right attachment portion 39 of the right side sill 18.

The cross member 40 is a linear member that spans between the left mounting portion 38 of the left side sill 17 and the right mounting portion 39 of the right side sill 18.
The cross member 40 includes a left end 61 attached to the left attachment portion 38 of the left side sill 17 with a bolt 52, a right end 62 attached to the right attachment portion 39 of the right side sill 18 with a bolt 58, and a left front side frame. The left fixing portion 63 is attached to the left attachment portion 68 of the rear end 21 with a bolt 53, and the right fixing portion 64 is attached to the right attachment portion 69 of the right front side frame rear end 24 with a bolt 59.

As described above, the cross member 40 is bridged between the left mounting portion 38 of the left side sill 17 and the right mounting portion 39 of the right side sill 18, and the cross member 40 is mounted on the left mounting portion 68 of the left front side frame rear end 21. At the same time, it was attached to the right attachment part 69 of the right front side frame rear end 24.
Thereby, the rigidity of the front floor panel 19 attached between the left and right side sills 17 and 18 can be increased by the cross member 40.

Further, the cross member 40 has a left connecting portion 65 and a right connecting portion 66.
The left connecting portion 65 is a portion that connects the left mounting portion 38 of the left side sill 17 and the left mounting portion 68 of the left front side frame rear end 21.
The right connecting portion 66 is a portion that connects the right mounting portion 39 of the right side sill 18 and the right mounting portion 69 of the right front side frame rear end 24.

  By connecting the left mounting portion 38 of the left side sill 17 and the left mounting portion 68 of the left front side frame rear end 21 with the left connecting portion 65, the vehicle body front structure 10 has the left connecting portion 65, the left load transmitting member 35, and the left The front side frame rear end 21 forms a substantially triangular left rigid region 71.

  Further, by connecting the right mounting portion 39 of the right side sill 18 and the right mounting portion 69 of the right front side frame rear end 24 with the right connecting portion 66, the vehicle body front structure 10 has the right connecting portion 66 and the right load transmitting member 36. The right front side frame rear end 24 forms a substantially triangular right rigid region 72.

  Since the left and right load transmission members 35 and 36 are symmetrical members, the left load transmission member 35 will be described below, and a detailed description of the right load transmission member 36 will be omitted.

FIG. 3 is a perspective view showing the left load transmitting member and the left connecting portion of the cross member of the vehicle body front structure according to the first embodiment.
A base 72a of the left front pillar 72 is attached to an intersection 74 (see also FIG. 2) between the front end portion 17a of the left side sill 17 and the left outrigger 15.
A dashboard lower 73 is attached along the left front pillar 72.
A left attachment portion 38 is attached to the front end portion 17 a of the left side sill 17.
The left load transmission member 35 is attached to the left attachment portion 38 and the left rear fastening portion 31 with bolts 51 and 52.

  In the left load transmission member 35, a left arm 46 that extends linearly is disposed between the left rear fastening portion 31 and the left side sill 17 of the front subframe 30, and a left front end portion 47 is connected to the left rear fastening portion 31 with a bolt 51. The left rear end portion 48 is attached together with the left end portion 61 of the cross member 40 with a bolt 52.

By connecting the left rear fastening portion 31 of the left sub-side frame 41 and the left mounting portion 38 of the left side sill 17 with the left load transmission member 35, the intersection 74 between the front end portion 17a of the left side sill 17 and the left outrigger 15 is reinforced. can do.
Thereby, the rigidity of the base part 72a of the left front pillar 72 attached to the intersection part 74 of the front end part 17a of the left side sill 17 and the left outrigger 15 can be increased (secured).

  Furthermore, by connecting the left rear fastening portion 31 of the left sub-side frame 41 and the left mounting portion 38 of the left side sill 17 with the left load transmission member 35, when an impact load acts rearward from the front of the vehicle body, The applied impact load can be distributed to the left side sill 17 through the left load transmitting member.

  In addition, the left load transmission member 35 is disposed along the left outrigger 15 by connecting the left rear fastening portion 31 of the left sub-side frame 41 and the left mounting portion 38 of the left side sill 17 with the left load transmission member 35. Can do.

By disposing the left load transmission member 35 along the left outrigger 15, the cross-sectional area serving as an impact load transmission path can be the cross-sectional area of both the left outrigger 15 and the left load transmission member 35.
Thereby, it is possible to ensure a large cross-sectional area as a transmission path for the impact load, and to transmit the impact load more efficiently.

In the cross member 40, the left end portion 61 is fastened together with the left rear end portion 48 with the bolt 52 on the left attachment portion 38 of the left side sill 17, and the left fixing portion 63 is attached to the left attachment portion 68 of the left front side frame rear end 21 with the bolt 53. It is attached with.
Therefore, the left attachment portion 38 of the left side sill 17 and the left attachment portion 68 of the left front side frame rear end 21 can be connected by the left connecting portion 65 of the cross member 40.

The left connecting portion 65, the left load transmitting member 35, and the left front side frame rear end 21 can form a substantially triangular left rigid region 71.
The left rigid region 71 is located behind the left rear fastening portion 31 of the left sub-side frame 41.
Thus, when an impact load is applied from the front of the vehicle body toward the rear, the applied impact load can be efficiently distributed to the rear of the vehicle through the left rigid region 71.

  Further, by forming the left rigid region 71 behind the left rear fastening portion 31 of the left sub-side frame 41, the left rear fastening portion 31 of the left sub-side frame 41 faces the rear of the vehicle body due to an impact load applied to the front portion of the vehicle body. To prevent displacement.

FIG. 4 is a cross-sectional view showing a state of being broken along the left load transmission member according to the present invention, and FIG. 5 is a cross-sectional view showing a state of being broken along the cross member according to the present invention.
In the left sub-side frame 41, the left rear fastening portion 31 is disposed at the same height with respect to the left mounting portion 68 of the left front side frame rear end 21 and at the same height with respect to the left mounting portion 38 of the left side sill 17. Is arranged.

  That is, the attachment surface 31a of the left rear fastening portion 31 of the left sub-side frame 41, the attachment surface 68a of the left attachment portion 68 of the left front side frame rear end 21, and the attachment surface 38a of the left attachment portion 38 of the left side sill 17 are respectively It is formed substantially flush.

The attachment surface 31 a of the left rear fastening portion 31 of the left sub-side frame 41 is a surface to which the left front end portion 47 of the left load transmission member 35 is attached.
The attachment surface 68a of the left attachment portion 68 of the left front side frame rear end 21 is a surface to which the left fixing portion 63 of the cross member 40 is attached (see FIG. 5).
The attachment surface 38a of the left attachment portion 38 of the left side sill 17 is a surface to which the left rear end portion 48 of the left load transmission member 35 and the left side portion 61 of the cross member 40 are attached together.

The left rear fastening portion 31 of the left sub-side frame 41 is disposed at the same height with respect to the left mounting portion 68 of the left front side frame rear end 21, so that the left rear fastening portion 31 is placed at the front end portion 68 b of the left mounting portion 68. (See FIG. 4).
Further, the left rear fastening portion 31 of the left sub-side frame 41 is disposed at the same height with respect to the left attachment portion 38 of the left side sill 17, so that the left rear fastening portion 31 is connected to the front end portion 38 b ( (See FIG. 3).

  The reason why the left rear fastening portion 31 is opposed to the front end portion 68b of the left attachment portion 68 and the front rear portion 38b of the left attachment portion 38 will be described in detail with reference to FIG.

Next, an example in which an impact load acts on the vehicle body front structure 10 will be described with reference to FIG.
FIGS. 6A and 6B are views for explaining a state in which an impact load is applied to the vehicle body front portion structure according to the first embodiment.
In (a), when the impact load F is applied from the front of the vehicle body toward the rear, the applied impact load F can be distributed to the left load transmission member 35.
The impact load distributed to the left load transmission member 35 can be transmitted to the left side sill 17.

Further, by forming the left rigid region 71 behind the left rear fastening portion 31 of the left sub-side frame 41, the left rear fastening portion 31 of the left sub-side frame 41 is rearward of the vehicle body due to the impact load F acting on the front portion of the vehicle body. It is possible to prevent displacement toward the surface.
In this way, by suppressing the displacement of the left rear fastening portion 31 of the left sub-side frame (so-called collapse of the sub-side frame 30), it is possible to suppress the amount of change in the alignment with respect to the front suspension (the mounting angle of the tire with respect to the vehicle body). it can.

In addition, by suppressing the fall of the sub-side frame 30, it is not necessary to separately provide a stay for preventing the fall of the sub-side frame 30, which is necessary for the conventional vehicle body front structure.
Thereby, the number of parts can be reduced and the weight reduction of the vehicle body front part structure 10 can be achieved.

  In (b), the left rear fastening portion 31 is opposed to the front end portion 68b of the left attachment portion 68 of the left front side frame rear end 21, and is opposed to the front end portion 38b (see FIG. 3) of the left attachment portion 38 of the left side sill 17. I am letting.

Therefore, in the unlikely event that the fastening state of the left rear fastening portion 31 is released due to an impact load F acting from the front of the vehicle body toward the rear, the left rear fastening portion 31 is attached to the left front side frame rear end 21 on the left side. The front end portion 68b of the portion 68 and the front end portion 38b of the left attachment portion 38 of the left side sill 17 can be pressed.
Thereby, the impact load F can be supported by the front end portion 68 b of the left mounting portion 68 of the left front side frame rear end 21 and the front end portion 38 b of the left mounting portion 38 of the left side sill 17.

  Next, the vehicle body front structure 80 of the second embodiment will be described with reference to FIG. In addition, in the vehicle body front part structure 80 of 2nd Embodiment, the same code | symbol is attached | subjected about the same similar member as the vehicle body front part structure 10 of 1st Embodiment, and description is abbreviate | omitted.

FIG. 7 is an exploded view showing the vehicle body front structure according to the present invention (second embodiment) as viewed from the bottom side.
In the vehicle body front structure 80, the left and right load transmitting members 35, 36 of the first embodiment are replaced with left and right load transmitting members 82, 83, and the cross member 40 of the first embodiment is replaced with a cross member 84. In other respects, the configuration is the same as that of the vehicle body front structure 10 of the first embodiment.

The left load transmitting member 82 includes a left arm 86 that connects the left rear fastening portion 31 of the left sub-side frame 41 and the left mounting portion 38 of the left side sill 17, and the left mounting portion 38 of the left side sill 17 and the left front side frame rear end 21. And a left connecting portion 87 for connecting the left mounting portion 68.
The left load transmission member 82 is formed in a substantially L shape with the left arm 86 and the left connecting portion 87.

  The left load transmission member 82 includes a left front end portion 88 attached to the left rear fastening portion 31 of the left sub-side frame 41 with a bolt 51 and a left top portion attached to the left attachment portion 38 of the left side sill 17 with a bolt 52. 91 and a left rear end portion 92 attached to the left attachment portion 68 of the left front side frame rear end 21 with a bolt 53.

The right load transmission member 83 includes a right arm 94 that connects the right rear fastening portion 32 of the right sub-side frame 42 and the right mounting portion 39 of the right side sill 18, and the right mounting portion 39 of the right side sill 18 and the right front side frame rear end 24. And a right connecting portion 95 for connecting the right mounting portion 69.
The right load transmission member 83 is formed in a substantially L shape with the right arm 94 and the right connecting portion 95.

  The right load transmission member 83 is attached with a bolt 58 to the right front end portion 96 of the right arm 94 attached to the right rear fastening portion 32 of the right sub-side frame 42 with a bolt 57 and the right attachment portion 39 of the right side sill 18. And a right rear end portion 98 attached to a right attachment portion 69 of the right front side frame rear end 24 with a bolt 59.

The cross member 84 is a member that spans the left and right front side frames and the rear ends 21 and 24.
The cross member 84 has a left end 101 attached to the left attachment portion 68 of the left front side frame rear end 21 with a bolt 53 and a right end 102 attached to a right attachment portion 69 of the right front side frame rear end 24 with a bolt 59. Yes.

The bolt 53 is a fastening member that fastens the left rear end portion 92 of the left load transmitting member 82 and the left end portion 101 of the cross member 84 together with the left mounting portion 68 of the left front side frame rear end 21.
The bolt 59 is a fastening member that fastens the right rear end portion 98 of the right load transmission member 83 and the right end portion 102 of the cross member 84 together with the right attachment portion 69 of the right front side frame rear end 24.

The cross member 84 and the left and right connecting portions 87 and 95 are attached in a linearly extending state.
Thereby, the rigidity of the front floor panel 19 attached between the left and right side sills 17 and 18 can be increased by the cross member 84 and the left and right connecting portions 87 and 95.

Further, the left load transmission member (left arm 86, left connecting portion 87) 82 and the left front side frame rear end 21 can form a substantially triangular left rigid region 71 (see FIG. 1).
Similarly, the right load transmission member (right arm 94, right connecting portion 95) 83 and the right front side frame rear end 24 can form a substantially triangular right rigid region 72 (see FIG. 1).

That is, according to the vehicle body front structure 80 of the second embodiment, the same configuration as that of the vehicle body front structure 10 of the first embodiment can be obtained.
Therefore, according to the vehicle body front part structure 80 of the second embodiment, the same effects as those of the vehicle body front part structure 10 of the first embodiment can be obtained.

In the above-described embodiment, in the cross members 40 and 84, the part facing the front floor panel 19 is formed at the same height as the attachment surface 68a of the left attachment part 68 and the attachment surface of the right attachment part 69. Although described, the shape of the cross members 40 and 84 is not limited to this.
As another example, it is possible to raise the portion of the cross members 40, 84 facing the front floor panel 19 to the front floor panel 19 and attach the raised portion to the front floor panel 19.
As means for attaching the raised portion to the front floor panel 19, a fastening member such as a bolt or welding can be used.
By attaching the cross members 40 and 84 to the front floor panel 19, the rigidity of the front floor panel 19 can be further increased.

  The vehicle body front structure of the present invention is suitable for application to an automobile having a front subframe below the left and right front side frames.

It is a figure which shows the state which looked at the vehicle body front part structure which concerns on this invention (1st Embodiment) from the bottom face side. It is an exploded view which shows the state which looked at the vehicle body front part structure which concerns on 1st Embodiment from the bottom face side. It is a perspective view which shows the left load transmission member of the vehicle body front part structure which concerns on 1st Embodiment, and the left connection part of a cross member. It is sectional drawing which shows the state fractured | ruptured along the left load transmission member which concerns on this invention. It is sectional drawing which shows the state fractured | ruptured along the cross member which concerns on this invention. It is a figure explaining the state where the impact load acted on the vehicle body front part structure which concerns on 1st Embodiment. It is an exploded view which shows the state which looked at the vehicle body front part structure which concerns on this invention (2nd Embodiment) from the bottom face side.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,80 ... Car body front part structure, 11 ... Left front side frame (front side frame), 11a, 12a ... Rear end part, 12 ... Right front side frame (front side frame), 13 ... Left rear frame (rear frame) , 14 ... Right rear frame (rear frame), 15 ... Left outrigger (outrigger), 16 ... Right outrigger (outrigger), 17 ... Left side sill (side sill), 18 ... Right side sill (side sill), 30 ... Front subframe, 31 ... left rear fastening part (rear fastening part), 32 ... right rear fastening part (rear fastening part), 33 ... left front fastening part (front fastening part), 34 ... right front fastening part (front fastening part), 35, 82 ... left Load transmitting member, 36, 83 ... right load transmitting member, 40, 84 ... cross member, 47, 88 ... left front end, 48, 92 ... left rear end, 55 96 ... right front portion, 56,98 ... right rear portion, 65,87 ... left connecting portion, 66,95 ... right connecting portion, 71 ... Left rigidity region, 72 ... right rigid area.

Claims (1)

The left and right rear frames extend from the rear ends of the left and right front side frames toward the rear of the vehicle body, and the left and right outriggers protrude from the rear ends of the left and right front side frames toward the outside in the vehicle width direction. with extending the sill of the left and right towards the rear of the vehicle body from the left and right outrigger, the fastening portion of the front and rear description of front sub frame to the left and right front side frames and the rear frame of the left and right is mounted from the bottom of the vehicle body, respectively In the body front structure,
A left load transmitting member in which a left front end is fastened to the left rear fastening portion of the front subframe from below the vehicle body, and a left rear end is fastened to the left side sill from below the vehicle body ,
A right load transmission member having a right front end fastened to the right rear fastening portion of the front subframe from below the vehicle body, and a right rear end portion fastened to the right side sill from below the vehicle body ;
The left side sill and the left side sill are fastened together with the left load transmission member from the lower side of the vehicle body, the right side sill is fastened together with the right load transmission member and the lower side of the vehicle body, and spanned between the left side sill and the right side sill. a cross member that is fastened from below the vehicle body to the rear frame of the right and left,
With
The cross member has a left connecting portion that connects the left side sill and the left rear frame, and a right connecting portion that connects the right side sill and the right rear frame,
The left load transmitting member, the left connecting portion and the left rear frame form a substantially triangular left rigid region, and the right load transmitting member, the right connecting portion and the right rear frame form a substantially triangular right rigid region. A vehicle body front structure characterized by being formed.

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