JP2010162950A - Vehicle body front part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body front part structure capable of further reducing deformation of a dashboard for partitioning an engine room and a cabin. <P>SOLUTION: In the vehicle body front part structure, the engine room for storing a power unit 55 and the cabin are partitioned by the dashboard. Frame bodies 33, 34, 35 of a triangular shape in plan view are fixed to a front surface 16a of a dashboard lower 16 constituting a lower part of the dashboard, a first apex 14a of the triangle is arranged at a center in a vehicle width direction such that it is projected to a front side of the vehicle body, and two remaining apexes provided on both ends of a bottom side of the triangle are supported on left and right front pillars 11, 12 side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an improvement in a vehicle body front structure.

  As a conventional vehicle body front part structure, a structure that suppresses deformation of a dash panel that partitions a compartment room and a vehicle compartment toward the vehicle compartment side at the time of a frontal collision of the vehicle is known (for example, see Patent Document 1).

FIG. 3 of Patent Document 1 will be described with reference to FIG. In addition, the code | symbol was reassigned.
FIG. 7 is a plan view showing a conventional vehicle body front part structure. A compartment room 101 in which a power unit is housed and a compartment 102 are partitioned by a dash panel 103, and a front wall part 104 is formed on the front surface of the dash panel 103. The outer cross member 106 formed in the shape of an arch is joined, and the inner cross member 108 having both ends attached to the left and right front pillars 107 and 107 is joined to the rear surface of the dash panel 103.
The outer cross member 106 includes a high-rigidity area portion 111 including the front wall portion 104 and an easy crushing area portion 112 provided on the rear side of the high-rigidity area portion 111.

JP 2002-370672 A

  When the vehicle having the vehicle body structure receives a frontal collision, the power unit in the compartment room 101 moves backward and collides with the outer cross member 106. At this time, the input load from the power unit is dispersed by the arch-shaped high-rigidity area portion 111, and further, collision energy is absorbed by the crushing of the easy crushing area portion 112, but from the power unit located in front of the dash panel 103, Since the input load acts on the outer cross member 106 and the inner cross member 108 as they are, it is difficult to prevent the dash panel 103 from entering the vehicle compartment. It is desired to make the deformation of the dash panel 105 toward the passenger compartment smaller.

  The objective of this invention is providing the vehicle body front part structure which can make deformation | transformation of the dashboard (dash panel) which partitions an engine room and a vehicle compartment smaller.

  The invention according to claim 1 is a vehicle body front structure in which an engine room in which a power unit is accommodated and a vehicle compartment are partitioned by a dashboard, and the front side of the dashboard lower constituting the lower part of the dashboard is triangular in plan view. The frame is fixed, placed at the center in the vehicle width direction so that one vertex of the triangle protrudes forward, and the remaining two vertices provided at both ends of the bottom of the triangle are supported on the left and right front pillars It is characterized by being.

  When the vehicle hits the front, if the power unit moves backward and hits the apex of the frame that protrudes forward, the power unit rotates to the left or right around the apex position with the apex. Move to the left or right along the slope of the frame, which moves diagonally backward.

  As a result, the collision energy is absorbed by the left or right movement of the power unit, the energy for deforming the dashboard lower in the front-rear direction via the frame body is reduced, and the amount of deformation of the dashboard lower toward the passenger compartment is further increased. Get smaller.

The invention according to claim 2 is characterized in that a cross member for connecting the left and right front pillars is provided on the rear surface of the dashboard lower, and the frame is supported by the cross member.
The left and right front pillars are the parts that form the passenger compartment and also the parts that support the front door, so they are formed with high rigidity. The body is firmly supported.

The invention according to claim 3 is characterized in that a plurality of frame bodies are provided so as to be lined up and down, and the outer surfaces of these frame bodies are closed by a plate material to form a box body.
The rigidity and strength of the box body are further enhanced by the plurality of frame bodies and the plate material attached so as to close the outer surfaces of these frame bodies.

In the invention according to claim 4, the frame body includes a bar member that vertically extends forward from the dashboard lower side and forms a protrusion protruding forward from one apex, and a support member that supports the bar member. It is characterized by providing.
By providing the frame with the bar and the support member, the structure of the frame is simplified, and the input load in the front-rear direction acting on the frame from the power unit is easily supported by the bar.

  In the invention according to claim 1, a frame body having a triangular shape in plan view is fixed to the front surface of the dashboard lower constituting the lower portion of the dashboard, and one center of the triangle projects in the vehicle width direction so that one vertex of the triangle projects forward of the vehicle body. The remaining two vertices provided at both ends of the base of the triangle are supported by the left and right front pillars, so that the power unit can be rotated left or right by one vertex of the triangle at the time of frontal collision In addition, it can be moved to the outside of the left and right via the left and right hypotenuses of the triangle, and deformation of the dashboard to the passenger compartment side can be suppressed. Therefore, it is possible to prevent the power unit from entering the vehicle interior.

  In the invention according to claim 2, since the cross member for connecting the left and right front pillars is provided on the rear surface of the dashboard lower, and the frame body is supported by the cross member, the triangular frame body is reliably supported by the cross member. can do.

  In the invention according to claim 3, a plurality of frames are provided so as to be lined up and down, and the outer surface of these frames is closed by a plate material and formed into a box body, so that rigidity and strength can be improved. In addition, since the slope is formed at the position of the oblique side of the triangle, the power unit can be smoothly moved to the side of the vehicle body.

In the invention according to claim 4, the frame body extends vertically from the dashboard lower side and forms a protrusion that protrudes forward from one apex, and a support member that supports the bar. Since it is provided, the frame can be configured simply, and the cost can be reduced.
In addition, the strength and rigidity of the triangular frame can be improved by a bar extending vertically forward.

It is a perspective view which shows Example 1 of the vehicle body front part structure which concerns on this invention. It is explanatory drawing which shows the box-shaped protrusion member (Example 1) of the vehicle body front part structure which concerns on this invention. It is a top view which shows Example 1 of the vehicle body front part structure which concerns on this invention. It is an operation view showing an operation of the vehicle body front structure according to the present invention. It is a perspective view which shows the planar protrusion member (Example 2) of the vehicle body front part structure which concerns on this invention. It is a top view which shows Example 2 of the vehicle body front part structure which concerns on this invention. It is a top view which shows the conventional vehicle body front part structure.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In the description, left, right, front, and rear indicate directions based on the driver who has boarded the vehicle. The drawings are to be viewed in the direction of the reference numerals.

A first embodiment of the present invention will be described. The arrow (FRONT) in the figure represents the front of the vehicle (the same applies hereinafter).
As shown in FIG. 1, a dashboard 13 is provided between the left and right front pillars 11, 12, and the engine room ER (see FIG. 4A) and the vehicle compartment CA are partitioned by this dashboard 13, and the dashboard A box-like projecting member 14 that is a projecting member that suppresses the amount of deformation of the dashboard 13 into the passenger compartment CA when the vehicle collides from the front is attached to the front surface of 13.

  The dashboard 13 includes a substantially flat dashboard upper 15 constituting an upper portion and a dashboard lower 16 attached to the lower portion of the dashboard upper 15, and a box-shaped protruding member 14 is disposed on the front of the dashboard lower 16. Installed.

  Reference numerals 21 and 22 in the figure denote a pair of left and right front side frames whose rear ends are connected to the lower part of the dashboard lower 16, and 23 and 24 denote a pair of left and right attached to the front pillars 11 and 12 so as to protrude forward. The wheel house upper member 26 is a side sill whose front end is attached to the lower end of the front pillar 11, 27 is a center pillar raised from the middle of the side sill 26, and 28 is joined to the upper end of the front pillar 11. This is a roof side rail in which the upper end of the center pillar 27 is connected to an intermediate portion.

  FIG. 2A is a perspective view of the box-shaped projecting member 14, and the box-shaped projecting member 14 includes triangular metal frames 33, 34, and 35 that are arranged vertically and these frames 33 and 34. , 35 are welded to plate members 41 to 45 (only reference numerals 41, 42 and 43 are shown) made of steel plates attached so as to block the frame bodies 33, 34 and 36 and the dashboard lower 16 (see FIG. 1). The upper and lower flanges 47 and 48 are attached to the upper and lower edges of the plate member 45 (see FIG. 2B) on the back side.

The box-shaped protrusion 14 has a first vertex 14a composed of a ridge line projecting forward, and a second vertex 14b and a third vertex 14c composed of a ridge line projecting left and right behind the first vertex 14a.
The plate members 41 and 42 are members that form the inclined surfaces 41 a and 42 a as the oblique sides of the box-shaped protruding member 14.

  Each of the frame bodies 33 to 35 includes first vertices 33a, 34a, and 35a each including a ridge line protruding forward, and a second vertex 33b including a ridge line that protrudes left and right behind the first vertices 33a, 34a, and 35a. , 34b, 35b and third vertices 33c, 34c, 35c. Reference numerals 33e, 34e, 35e and reference numerals 33f, 34f, 35f are hypotenuses of the frame bodies 33, 34, 35.

  2B is a cross-sectional view taken along the line bb of FIG. 2A, and the cross sections of the frame bodies 33, 34, and 35 are rectangular, and the plate material 41 is provided on the side surfaces of the frame bodies 33, 34, and 35. The plate member 43 is attached to the upper surface of the frame body 33, the plate member 44 is attached to the lower surface of the frame member 35, and the plate member 45 is attached to the rear surfaces of the frame members 33, 34, and 35.

As shown in FIG. 3, the left and right ends of the dashboard lower 16 are attached to the left and right front pillars 11 and 12, and the upper flange 47 and the lower flange 48 (see FIG. 1), a rear engine mount 51 is attached to the first apex 14a of the box-like projecting member 14, and a left engine mount 52 and a right engine mount 53 are attached to the left and right front side frames 21 and 22, respectively. A power unit 55 is attached to the three rear engine mounts 51, the left engine mount 52, and the right engine mount 53, while the cross member 54 passed to the left and right front pillars 11 and 12 on the back surface 16b of the dashboard lower 16. Is installed.
That is, the box-shaped protruding member 14 is supported by the left and right front pillars 11 and 12 via the dashboard lower 16 and the cross member 54.

The rear engine mount 51 is attached to the center of the power unit 55 in the vehicle width direction, but may be attached to a position offset to the left or right with respect to the center of the vehicle width direction.
Reference numerals 21 a and 22 a are notches that are weak portions formed on the outer surfaces of the front side frames 21 and 22, respectively.

FIG. 4A schematically shows a plan view of the vehicle 62 before the collision object 61 collides.
In the vehicle 62, a power unit 55 is disposed in the engine room ER, and a driver seat 64 and a passenger seat 65 are disposed in the passenger compartment CA.

FIG. 4B shows a state where the collision object 61 has collided with the front surface of the vehicle 62.
The power unit 55 is moved rearward by the collision object 61, the back surface of the power unit 55 hits the first vertex 14a of the box-shaped protruding member 14, and the power unit 55 is centered on the contact portion with the first vertex 14a, for example, an arrow A As shown by the arrow B, it rotates to the left, and as indicated by the arrow B, it has moved to the left along the slope 41a.

  As a result, the left front side frame 21 is pressed by the power unit 55, and the front side frame 21 is deformed starting from the notch 21a that becomes a fragile portion to absorb the collision energy.

  Therefore, the deformation of the box-shaped projecting member 14, the dashboard lower 16 and the cross member 54 shown in FIG. 3 is reduced, and the deformation of the dashboard lower 16 into the passenger compartment CA (see FIG. 4B) is suppressed. . Accordingly, it is possible to prevent the power unit 55 from entering the passenger compartment CA.

  As shown in FIG. 5, the frame 71 includes a base plate 72 made of a steel plate, a bar 73 attached to the base plate 72 so as to protrude perpendicularly to the front of the vehicle, and the bar 73 from the left and right. It is a planar projecting member composed of supporting members 74 and 75 for supporting.

  The bar 73 and the support members 74 and 75 are circular, rectangular, or a bar-like metal member having a cross section, and by making the outer dimensions of the bar 73 larger than the outer dimensions of the support members 74 and 75, Strength and rigidity are improved.

  As shown in FIG. 6, the base plate 72 of the frame 71 is attached to the dashboard lower 16, the rear engine mount 51 is attached to the tip 73 a of the bar 73, the rear engine mount 51, and the left engine mount 52. A power unit 55 is attached to the right engine mount 53.

  A triangle is formed by the axes 74a and 75a of the support members 74 and 75 and the base plate 72, and one apex 71a projecting forward of the triangle (corresponding to a portion of the rod 73 to which the support members 74 and 75 are attached). In contrast, the protrusion 73b of the bar 73 protrudes further forward.

  For example, when there is a collision object from the front of this vehicle, the power unit 55 moves backward and hits the tip 73a of the bar 73 of the frame 71. The power unit 55 is shown in FIG. In the same manner as described above, the rod 73 rotates left or right around the contact portion with the tip 73a, and moves to the left or right, or the support members 74 and 75 are inclined obliquely rearward. Move left or right along. Then, one of the front side frames 21 and 22 is deformed to absorb the collision energy.

  As shown in FIGS. 1 to 4, in the vehicle body front structure in which the engine room ER in which the power unit 55 is housed and the vehicle compartment CA are partitioned by the dashboard 13, a dash constituting the lower part of the dashboard 13. Frames 33, 34, and 35 having a triangular shape in plan view are fixed to the front surface 16a of the board lower 16, and the first vertices 33a, 34a, and 35a (and the first vertex 14a) as one vertex of the triangle are in front of the vehicle body. The second vertices 33b, 34b, 35b (the second vertex 14b) and the third vertices 33c, 34c as the remaining two vertices arranged at the center in the vehicle width direction so as to protrude and provided at both ends of the base of the triangle , 35c (the third vertex 14c) are supported on the left and right front pillars 11 and 12, so that the power unit 55 can be connected to the triangular first vertices 33a, 34a, 5a (first vertex 14a) can be rotated to the left or right, and moved to the left and right through the left and right hypotenuses 33e, 34e, 35e, 33f, 34f, and 35f (the hypotenuses 41a and 42a) of the triangle The deformation of the dashboard 13 toward the passenger compartment CA can be suppressed. Accordingly, it is possible to prevent the power unit 55 from entering the passenger compartment CA.

  As shown in FIG. 3 above, a cross member 54 for connecting the left and right front pillars 11 and 12 is provided on the back surface 16b of the dashboard lower 16, and the cross members 54 form frame bodies 33, 34, and 35 in a box shape. Since the protruding member 14 is supported, the triangular frame bodies 33, 34, 35 and the box-shaped protruding member 14 can be reliably supported by the cross member 54.

  2 (a) and 2 (b), a plurality of frame bodies 33, 34, and 35 are provided so as to be lined up and down, and the outer surfaces of these frame bodies 33, 34, and 35 are plate members 41 to 41. 45, it is formed in the box-shaped projecting member 14 as a box body, so that the rigidity and strength of the box-shaped projecting member 14 can be improved, and the oblique sides 33e, 34e, 35e, 33f, triangles, Since the slopes 41a and 42a are formed at the positions 34f and 35f, the power unit 55 can be smoothly moved to the side of the vehicle body along the slopes 41a and 42a.

As shown in FIG. 5 and FIG. 6, the frame 71 has a bar 73 that extends vertically forward from the dashboard lower 16 side and forms a protrusion 73b that protrudes forward from one apex 71a. Since the support members 74 and 75 that support the bar 73 are provided, the frame 71 can be simply configured, and the cost can be reduced.
Further, the strength and rigidity of the frame 71 can be improved by the bar 73 extending vertically forward.

  In this embodiment, as shown in FIG. 2A, the plate members 41 to 45 are attached to the frames 33, 34, and 35. However, the present invention is not limited to this, and the dashboard lower 16 (see FIG. 1). You may comprise only the frame 33,34,35, without attaching the board | plate materials 41-45, and the protrusion member attached to a front surface.

  The vehicle body front structure of the present invention is suitable for an automobile.

  DESCRIPTION OF SYMBOLS 11, 12 ... Front pillar, 13 ... Dashboard, 14 ... Box body (box-shaped protrusion member), 14a, 14b, 14c ... Vertex (first vertex, second vertex, third vertex), 16 ... Dashboard lower, 16a ... Front, 16b ... Back, 33, 34, 35, 71 ... Frame, 33a, 34a, 35a ... Vertex (first vertex), 33b, 34b, 35b ... Vertex (second vertex), 33c, 34c, 35c ... vertex (third vertex), 41-45 ... plate material, 54 ... cross member, 55 ... power unit, 71a ... vertex, 73 ... bar material, 73b ... projection, 74, 75 ... support member, CA ... vehicle compartment, ER …engine room.

Claims (4)

In the vehicle body front structure in which the engine room where the power unit is stored and the vehicle compartment are separated by a dashboard,
A triangular frame body in plan view is fixed to the front surface of the dashboard lower constituting the lower part of the dashboard, and is arranged at the center in the vehicle width direction so that one vertex of the triangle projects forward of the vehicle body. A vehicle body front structure characterized in that the remaining two apexes provided at both ends of the bottom side are supported on the left and right front pillars.   The vehicle body front structure according to claim 1, wherein a cross member for connecting the left and right front pillars is provided on a rear surface of the dashboard lower, and the frame body is supported by the cross member.   The vehicle body front portion according to claim 1 or 2, wherein a plurality of the frame bodies are provided so as to be lined up and down, and an outer surface of these frame bodies is closed by a plate material to form a box body. Construction.   The frame body includes a bar that vertically extends forward from the dashboard lower side and forms a protrusion that protrudes forward from the one apex, and a support member that supports the bar. The vehicle body front part structure according to claim 1 or 2.

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