JP2010105541A - Vehicle body front structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body front structure capable of enhancing rigidity relative to a load in a vertical direction of a wheel house for supporting a damper and enhancing the freedom of vehicle body design. <P>SOLUTION: The vehicle body front structure 10 includes: a left upper reinforcement tube 38 erected from a dash board 13 and reinforcing a left front pillar 23; and upper and lower damper reinforcement tubes 51, 52 for connecting the left upper reinforcement tube 38 to an apex 12a of the left wheel house 12. Furthermore, the upper and lower damper reinforcement tubes 51, 52 are provided so as to be gradually enlarged in vertical directions from the apex 12a of the left wheel house 12 toward the left upper reinforcement tube 38. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle body front structure in which a dashboard is provided in front of a vehicle body of a front pillar, and a damper is provided in front of the vehicle body of the dashboard.

Some vehicle body front structure includes a damper support member (hereinafter referred to as a “wheel house”) that supports a damper, and a pair of reinforcing members provided in a substantially V shape in a plan view at the rear of the wheel house. .
According to this vehicle body front structure, it is possible to increase the rigidity of the wheel house against a load in the vehicle width direction by providing the pair of reinforcing members in a substantially V shape in plan view (see, for example, Patent Document 1). .)
DE10236980A1

Here, the vehicle body front part structure of Patent Document 1 has a pair of reinforcing members provided in a substantially V shape in plan view, and therefore, the pair of reinforcing members increases the rigidity against a vertical load acting on the damper. Is difficult.
Therefore, in the vehicle body front structure of Patent Document 1, in addition to a pair of reinforcing members, a front reinforcing member and a side reinforcing member are provided on the front and side portions of the wheel house, respectively.
Thus, by providing the reinforcing member around the damper, it is possible to increase the rigidity against the load in the vertical direction acting on the damper.

However, in order to provide the front reinforcing member and the side reinforcing member in the wheel house that supports the damper, it is necessary to secure a space for providing the front reinforcing member and the side reinforcing member in the engine room.
The engine room is a relatively difficult area to secure, which has hindered the freedom of vehicle design.

  It is an object of the present invention to provide a vehicle body front structure that can increase the rigidity with respect to the vertical load of a wheel house that supports a damper and can increase the degree of freedom of vehicle body design.

  The invention according to claim 1 is a vehicle body front structure in which a dashboard is provided in front of a vehicle body of a front pillar, and a damper is provided in front of the vehicle body of the dashboard. A front pillar reinforcing member that reinforces, and an upper and lower damper reinforcing member that connects the front pillar reinforcing member and the damper, and the upper and lower damper reinforcing members are vertically moved from the damper toward the front pillar reinforcing member. It is characterized by being provided to spread gradually.

  According to a second aspect of the present invention, the dashboard includes a front board panel provided on the front side of the vehicle body and a rear board panel provided on the rear side of the vehicle body, and the front pillar between the front board panel and the rear board panel. A reinforcing member is sandwiched, and the upper and lower damper reinforcing members are provided on an upper portion exposed upward from the dashboard.

  In the invention according to claim 1, the front pillar reinforcing member is raised from the dashboard, and the front pillar is reinforced by the raised front pillar reinforcing member. In addition, upper and lower damper reinforcing members that connect the front pillar reinforcing member and the damper are provided.

The upper and lower damper reinforcing members are provided so as to gradually spread in the vertical direction from the damper toward the front pillar reinforcing member.
Thus, by providing the upper and lower damper reinforcing members so as to expand in the vertical direction, the rigidity against the vertical load of the wheel house that supports the damper can be increased.

Furthermore, since the rigidity with respect to the vertical load can be increased only by the upper and lower damper reinforcing members, the front reinforcing member and the side reinforcing member which have been conventionally required can be eliminated.
Thereby, it is not necessary to ensure the space which provides a front part reinforcement member and a side part reinforcement member in a damper, and the freedom degree of design can be raised.

In the invention according to claim 2, the front pillar reinforcing member is sandwiched between the front board panel and the rear board panel of the dashboard. And the upper and lower damper reinforcement members were provided in the upper part exposed upward from the dashboard.
Thereby, it is not necessary to newly prepare a site for providing the upper and lower damper reinforcing members, and the degree of freedom in design can be further increased.

  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 perspective view showing a vehicle body front structure according to the present invention.
The vehicle body front structure 10 includes left and right front side frames (front side frames) 11 extending in the longitudinal direction of the vehicle body, and left and right wheel houses 12 provided above rear end portions 11a of the left and right front side frames 11. The dashboard 13 provided at the rear of the vehicle body of the left and right wheel houses 12, the board reinforcing member 14 (see also FIG. 2) provided on the dashboard 13, and the left and right front pillars reinforced by the board reinforcing member 14 A front pillar) 23 and left and right damper reinforcing members 18 provided on the board reinforcing member 14.

The left and right front side frames 11, the left and right wheel houses 12, the left and right front pillars 23, and the left and right damper reinforcing members 18 are symmetrical members.
Therefore, the left front side frame 11, the left wheel house 12, the left front pillar 23, and the left damper reinforcing member 18 will be described, and the right front side frame 11, the right wheel house 12, the right front pillar 23, and the right damper reinforcing member 18 will be described. The description of is omitted.

The left and right front side frames 11 are arranged at predetermined intervals in the vehicle body width direction, and each frame extends in the vehicle body front-rear direction.
A left wheel house 12 is provided at a rear end portion 11a of the left front side frame 11 and a left upper member (not shown).
A top portion 16 a of a left damper (damper) 16 is supported on the top portion 12 a of the left wheel house 12.

The left damper 16 is usually a coil spring or a shock absorber, and is a member that absorbs a load acting in the vertical direction and the front-rear and left-right directions.
The rear end of the left upper member is connected to the front end 23 a of the left front pillar 23.

The right wheel house 12 is provided at the rear end portion 11 a of the right front side frame 11 and the right upper member 19 in the same manner as the left wheel house 12.
A top portion 16 a of a right damper (damper) 16 is supported on the top portion 12 a of the right wheel house 12.
The right upper member 19 has a rear end connected to a front end 23 a of the right front pillar 23. The left and right upper members 19 are symmetrical members.

Dashboards 13 are provided at the rear end portions 11 a of the left and right front side frames 11.
Left and right front pillars 23 are respectively provided behind the dashboard 13 on the vehicle body.

2 is an exploded perspective view showing a vehicle body front part structure according to the present invention, and FIG. 3 is a cross-sectional view taken along line 3-3 of FIG.
The dashboard 13 is a substantially rectangular panel member that partitions the rear part of the engine room 21 and the front part of the passenger compartment 22.
The dashboard 13 includes a board main body 24 that partitions the front portion of the passenger compartment 22, and left and right arch portions 25 provided on the left and right side portions 24 a of the board main body 24.
The left and right arch portions 25 are symmetrical members.

The board body 24 includes a central panel portion 27 that partitions the front portion of the passenger compartment 22, and left and right lower side panel portions (lower side panel portions) 28 provided on the left and right sides of the central panel portion 27. Yes.
The left and right lower side panel portions 28 are symmetrical members.

The center panel portion 27 includes a front board panel 31 on the front side of the vehicle body and a rear board panel 32 provided behind the front board panel 31.
The front board panel 31 is a portion that extends horizontally in the vehicle body width direction and has a cross-sectional shape bent in a substantially U shape toward the front of the vehicle body.

The left and right front side frames 11 extend from the left and right end portions 31a of the front board panel 31 toward the front of the vehicle body.
Further, left and right arch portions 25 are projected from the left and right end portions 31a of the front board panel 31 so as to gradually spread outward from the vehicle body toward the rear of the vehicle body.
The lower left side panel part 28 is provided in the lower part 25a of the left arch part 25, and is connected with the left side sill.

The left arch portion 25 is formed in a substantially fan shape, and a rear portion (a part) of the left wheel house is formed by bulging in a curved shape toward the rear of the vehicle body.
The left arch portion 25 is formed with a rear portion (a part) of the left wheel arch by forming the outer edge 25b in a curved shape.

A board reinforcing member 14 that reinforces the vehicle body front part structure 10 is sandwiched inside the dashboard 13 configured as described above.
Therefore, the board reinforcing member 14 is firmly attached to the dashboard 13 and the rigidity of the board reinforcing member 14 is increased.
As an example, the board reinforcing member 14 is formed of a tubular tube along the dashboard 13.

4 is an enlarged perspective view of the board reinforcing member of FIG.
The board reinforcing member 14 includes a central reinforcing tube portion 35 extending horizontally in the vehicle width direction, left and right tunnel reinforcing tube portions 36 provided in the vicinity of the left and right ends of the central reinforcing tube portion 35, and a central reinforcing member. Left and right lower reinforcement tube portions 37 extending downward from the left and right ends of the tube portion 35 toward the rear of the vehicle body, and upward gradients from the front ends of the left and right lower reinforcement tube portions 37 toward the rear of the vehicle body, respectively. And left and right upper reinforcing tube portions (front pillar reinforcing members) 38.

  The left and right tunnel reinforcing tube portions 36, the left and right lower reinforcing tube portions 37, and the left and right upper reinforcing tube portions 38 are left and right symmetrical members, respectively.

As shown in FIGS. 2 and 3, the central reinforcing tube portion 35 is a cylindrical member provided on the bent portion 31 b of the front board panel 31 from the rear side of the vehicle body, and the rear board panel 32 via the support member 41. Covered with.
That is, the central reinforcing tube portion 35 is sandwiched between the front board panel 31 and the rear board panel 32, and is provided at the rear end portion 11 a of the left front side frame 11 via the front board panel 31.

The left tunnel reinforcing tube portion 36 shown in FIG. 4 is a cylindrical member in which a front half portion 36a is provided on the rear board panel 32 (see FIG. 2), and a rear half portion 36b is provided in a floor tunnel (not shown). Yes.
The floor tunnel is a portion raised upward from the floor panel to form a space for accommodating a propeller shaft (not shown).

The lower left reinforcing tube portion 37 is a cylindrical member provided on the lower portion 25a (see FIG. 2) of the left arch portion 25 from the rear side of the vehicle body.
The lower left reinforcing tube portion 37 has a rear end portion 37a extending from the lower portion 25a of the left arch portion 25 toward the rear of the vehicle body (see FIG. 1).

The upper left reinforcing tube portion 38 is a cylindrical member provided on the upper portion 25c (see FIG. 2) of the left arch portion 25 from the rear side of the vehicle body, and the upper portion 38a is the upper portion of the left arch portion 25 (the left end portion of the dashboard 13). It extends (rises) from 25c toward the rear of the vehicle body in an upward gradient (see FIG. 1).
That is, the upper part 38 a of the upper left reinforcing tube part 38 is exposed upward from the dashboard 13.
As shown in FIG. 1, the front end portion 23a of the left front pillar 23 is reinforced at the upper end portion of the upper portion 38a.

  A left damper reinforcing member 18 that reinforces the left and right dampers 16 (see FIG. 1) is provided on the upper portion 38 a of the upper left reinforcing tube portion 38.

5 is a cross-sectional view taken along line 5-5 of FIG.
The left damper reinforcing member 18 includes an upper damper reinforcing tube (upper damper reinforcing member) 51 provided in the upper attaching portion 38b of the upper left reinforcing tube portion 38 and a lower damper provided in the lower attaching portion 38c of the upper left reinforcing tube portion 38. A reinforcing tube (lower damper reinforcing member) 52 is provided.

The upper damper reinforcing tube 51 has a rear end portion 51a that is welded to the upper mounting portion 38b of the upper left reinforcing tube portion 38 and a front end portion 51b that is welded to the top portion 12a of the left wheel house 12. This is a cylindrical reinforcing member that connects the upper mounting portion 38 b of the portion 38 and the top portion 12 a of the left wheel house 12.
Here, the front end portion 51 b of the upper damper reinforcing tube 51 is provided in a portion of the top portion 12 a of the left wheel house 12 in the vicinity of the top portion 16 a of the left damper 16.

The upper attachment portion 38b is a portion near the upper end portion of the upper portion 38a and is located above the top portion 12a.
Therefore, the upper damper reinforcing tube 51 is attached at a downward gradient from the upper attaching portion 38b of the upper left reinforcing tube portion 38 toward the top portion 12a of the left wheel house 12 (that is, toward the front of the vehicle body).

  The lower damper reinforcing tube 52 has a rear end portion 52a that is welded to the lower mounting portion 38c of the upper left reinforcing tube portion 38 and a front end portion 52b that is welded to the top portion 12a of the left wheel house 12. This is a cylindrical reinforcing member that connects the lower mounting portion 38 c of the portion 38 and the top portion 12 a of the left wheel house 12.

For example, the front end portion 52 b of the lower damper reinforcing tube 52 is provided in a state of being superimposed on the vicinity of the front end portion 51 b of the upper damper reinforcing tube 51 and the front end portion 51 b of the upper damper reinforcing tube 51.
Therefore, the front end portion 52 b of the lower damper reinforcing tube 52 is provided in a portion of the top portion 12 a of the left wheel house 12 in the vicinity of the top portion 16 a of the left damper 16, similarly to the front end portion 51 b of the upper damper reinforcing tube 51. .

The lower attachment portion 38c is a portion that is separated downward by a predetermined distance L from the upper attachment portion 38b in the upper portion 38a, and is located below the top portion 12a.
Therefore, the lower damper reinforcing tube 52 is attached in an upward gradient from the lower attaching portion 38c of the upper left reinforcing tube portion 38 toward the top portion 12a of the left wheel house 12 (that is, toward the front of the vehicle body).

In this manner, the upper damper reinforcing tube 51 is provided with a downward slope and the lower damper reinforcing tube 52 is provided with an upward slope.
Therefore, the upper and lower damper reinforcing tubes 51 and 52 are provided so as to gradually spread in the vertical direction from the top portion 12 a toward the upper portion 38 a of the upper left reinforcing tube portion 38.

Thus, the upper and lower damper reinforcing tubes 51 and 52 and the upper portion 38a of the upper left reinforcing tube portion 38 are formed in a substantially triangular shape in a side view.
The front end portion 51b of the upper damper reinforcing tube 51 and the front end portion 52b of the lower damper reinforcing tube 52 constitute a substantially triangular front vertex.
Here, as described above, the front end portion 51 b of the upper damper reinforcing tube 51 and the front end portion 52 b of the lower damper reinforcing tube 52 are provided in the vicinity of the top portion 16 a of the left damper 16.

  Thus, the upper and lower damper reinforcing tubes 51 and 52 are provided so as to expand in the vertical direction, and the front end portions 51b and 52b of the upper and lower damper reinforcing tubes 51 and 52 are connected to the left wheel house 12 (near the top 16a of the left damper 16). ), The rigidity of the left wheel house 12 with respect to the vertical load can be increased.

Here, the top portion 16 a of the left damper 16 is provided on the top portion 12 a of the left wheel house 12.
Therefore, the vertical load acting on the left damper 16 can be supported by the upper and lower damper reinforcing tubes 51 and 52 via the left wheel house 12.

Furthermore, since the rigidity with respect to the vertical load can be increased with only the upper and lower damper reinforcing tubes 51 and 52, it is not necessary to provide a front reinforcing member and a side reinforcing member in the left wheel house 12.
Thereby, it is not necessary to ensure the space which provides a front part reinforcement member and a side part reinforcement member in the left wheel house 12, and the freedom degree of design can be raised.

In addition, the boat reinforcing member 14 is sandwiched between the front board panel 31 (see FIG. 2) and the rear board panel 32 of the dashboard 13. Then, upper and lower damper reinforcing tubes 51 and 52 were provided on the upper portion 38a of the upper left reinforcing tube portion 38 exposed upward from the dashboard 13 (see also FIG. 1).
Thereby, it is not necessary to newly prepare the site | part which provides the upper and lower damper reinforcement tubes 51 and 52, and the freedom degree of design can further be raised.

Next, an example in which the left damper reinforcing member 18 supports the left damper 16 will be described with reference to FIG.
When the load F1 acts upward on the left damper 16 as indicated by an arrow (outlined), the compressive load F2 acts on the upper damper reinforcing tube 51 as indicated by an arrow (outlined) and the tensile load is applied to the lower damper reinforcing tube 52. F3 acts like an arrow (outlined).

Here, the upper and lower damper reinforcing tubes 51 and 52 and the upper portion 38a of the upper left reinforcing tube portion 38 are formed in a substantially triangular shape in a side view.
Therefore, the rigidity with respect to the compression load F2 acting on the upper damper reinforcing tube 51 and the rigidity with respect to the tensile load F3 acting on the lower damper reinforcing tube 52 can be increased.
Thereby, the compression load F2 and the tensile load F3 which acted on the upper and lower damper reinforcement tubes 51 and 52 can be supported by the respective reinforcement tubes 51 and 52.

  On the other hand, when the load F4 acts downward on the left damper 16 as indicated by the arrow (black), the compression load F5 acts on the lower damper reinforcing tube 52 as indicated by the arrow (black), and the tensile load on the upper damper reinforcing tube 51. F6 acts like an arrow (black).

As described above, the upper and lower damper reinforcing tubes 51 and 52 and the upper portion 38a of the upper left reinforcing tube portion 38 are formed in a substantially triangular shape in a side view.
Therefore, the rigidity with respect to the compression load F5 acting on the lower damper reinforcing tube 52 and the rigidity with respect to the tensile load F6 acting on the upper damper reinforcing tube 51 can be increased.
Thereby, the tensile load F6 and the compressive load F5 which acted on the upper and lower damper reinforcement tubes 51 and 52 can be supported by the respective reinforcement tubes 51 and 52.

  In the above embodiment, the example in which the board reinforcing member 14 and the left and right damper reinforcing members 18 are formed of cylindrical members has been described. However, the present invention is not limited to this, and the reinforcing members 14 and 18 are rectangular cylindrical members. It is also possible to form with other members such as a rod and a rod.

In the above embodiment, the example in which the upper damper reinforcing tube 51 and the lower damper reinforcing tube 52 of the left damper reinforcing member 18 are provided by welding has been described. However, the present invention is not limited to this, and the upper damper reinforcing tube 51 and the lower damper are not limited thereto. The reinforcing tube 52 can be provided by other fastening means such as bolts and rivets.
Further, in the above-described embodiment, the example in which the left and right damper reinforcing members 18 are provided on the top portions 12a of the left and right wheel houses 12 has been described. However, the present invention is not limited thereto, and the top portions 16a of the left and right dampers 16 and the left and right dampers 16 It is also possible to provide the left and right damper reinforcing members 18 at other portions.

  Moreover, although the said embodiment demonstrated the example which applied this invention to the vehicle which provided the left and right damper 16 in the left and right wheel houses 12, it is not restricted to this, The left and right damper 16 is replaced with another damper support member. It is also possible to apply the present invention to a vehicle provided in the vehicle.

  Further, the left and right wheel houses 12, the dashboard 13, the board reinforcing member 14, the left and right dampers 16, the left and right front pillars 23, the left and right damper reinforcing members 18, the front board panel 31 and the rear board panel shown in the above embodiment. The shape such as 32 is not limited to those illustrated, and can be changed as appropriate.

  The present invention is suitable for application to a vehicle having a vehicle body front structure in which a dashboard is provided in front of the front pillar and a damper is provided in front of the dashboard.

It is a perspective view which shows the vehicle body front part structure which concerns on this invention. It is a disassembled perspective view which shows the vehicle body front part structure which concerns on this invention. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. It is a perspective view which expands and shows the board reinforcement member of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle body front part structure, 12 ... Left and right wheel house, 12a ... Top part of wheel house, 13 ... Dashboard, 14 ... Board reinforcement member, 16 ... Left and right damper (damper), 18 ... Left and right damper reinforcement member, 23 ... left and right front pillars (front pillars), 31 ... front board panel, 32 ... rear board panel, 38 ... left and right upper reinforcing tube parts (front pillar reinforcing members), 38a ... upper part exposed upward from the dashboard.

Claims (2)

In the vehicle front structure in which a dashboard is provided in front of the front pillar body and a damper is provided in front of the dashboard body,
A front pillar reinforcing member that is launched from the dashboard and reinforces the front pillar;
An upper and lower damper reinforcing member that connects the front pillar reinforcing member and the damper; and
The vehicle body front part structure, wherein the upper and lower damper reinforcing members are provided so as to gradually spread in the vertical direction from the damper toward the front pillar reinforcing member. The dashboard includes a front board panel provided on the front side of the vehicle body, and a rear board panel provided on the rear side of the vehicle body,
The front pillar reinforcing member is sandwiched between the front board panel and the rear board panel,
The vehicle body front part structure according to claim 1, wherein the upper and lower damper reinforcing members are provided on an upper portion exposed upward from the dashboard.

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