JP4584963B2 - Body front structure - Google Patents

Description

  The present invention relates to a vehicle body front structure in which a front bumper is attached to a lower member of a bulkhead and a front grille is attached to an upper member of the bulkhead.

  In the vehicle body front structure, a hood edge that receives the front edge of the engine hood is provided above, and a front bumper is provided below the hood edge at a predetermined interval. Is provided.

Specifically, mounting pins are respectively provided on the upper and lower edges of the front grille. The upper edge mounting pin is inserted into the hood edge mounting hole, and the lower edge mounting pin is inserted into the front bumper mounting hole.
Thereby, the front grille is attached between the hood edge and the front bumper. (For example, refer to Patent Document 1).
JP-A-9-39835

According to the vehicle body front part structure of Patent Document 1, since the front grill is fixed by the mounting pin, it is possible to remove the front grill from the mounting position when an obstacle hits the front bumper.
By removing the front grille, the front bumper can be favorably deformed without being affected by the front grille.
By deforming the front bumper satisfactorily, it is possible to absorb the impact applied to the front bumper.

Here, the vehicle body front structure of Patent Document 1 is configured such that the front grille is removed when an obstacle hits the front bumper in order to absorb the impact applied to the front bumper.
However, it is not preferable that the front grille is removed when an obstacle hits the front bumper.

Furthermore, the front grille is attached between the hood edge and the front bumper simply by inserting the attachment pin of the front grille into the attachment hole.
For this reason, it is difficult to firmly attach the front grille between the hood edge and the front bumper.

  An object of the present invention is to provide a vehicle body front structure that can absorb an impact well without removing the front grille and can be firmly attached to the front grille.

  In the invention according to claim 1, the lower part of the front bumper is attached to the lower member of the bulk head, the front grill is disposed above the front bumper, and the upper part of the front grill is attached to the upper member of the bulk head. In the vehicle body front part structure, a lower part of the front grille is connected to the upper part of the front bumper, and a locking part is provided at a connecting part where the upper part of the front bumper and the lower part of the front grille are connected. Is provided on the bulkhead side so as to be slidable in the longitudinal direction of the vehicle body.

In the invention according to claim 1, the front bumper and the front grill are integrated by connecting the lower portion of the front grill to the upper portion of the front bumper. The lower part of the front bumper was attached to the bulkhead, and the upper part of the front grille was attached to the bulkhead.
In addition, a locking part was provided at the connecting part of the front bumper and the front grill, and the locking part was supported by a support part on the bulkhead side.

  As described above, there is an advantage that the front bumper and the front grille can be firmly attached by attaching the lower part of the front bumper and the upper part of the front grille to the bulkhead and further supporting the engaging part of the connecting part by the support part. .

  Here, the locking portion is supported by the support portion so as to be slidable in the longitudinal direction of the vehicle body. Therefore, when an obstacle hits the front bumper with the locking part supported by the support part, the locking part can be slid rearward of the vehicle body.

By sliding the locking portion to the rear of the vehicle body, the connecting portion can be smoothly moved to the rear of the vehicle body.
Thereby, there is an advantage that the front bumper can be favorably deformed according to the obstacle, and the impact energy can be suitably absorbed.

  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 front view showing a vehicle body front structure according to the present invention, and FIG. 2 is a sectional view taken along line 2-2 of FIG.
The vehicle body front structure 10 includes a bulkhead 12 provided on the front side of the engine room 11, left and right spacers 13 (only the right spacer 13 is illustrated) provided on the front part of the bulkhead 12, and left and right spacers 13. The bumper beam 14 provided below the bumper beam 14, the shock absorber 15 attached to the front surface of the bumper beam 14, the front bumper 16 provided on the front side of the shock absorber 15, and the front grill provided on the upper side of the front bumper 16. 17.
An engine hood 18 that covers the upper side of the engine room 11 is provided on the upper side of the engine room 11.

  In the bulkhead 12, the upper member 21 and the lower member 22 are provided substantially horizontally at a predetermined interval in the vertical direction, and the left end of the upper member 21 and the left end of the lower member 22 are connected by the left leg portion 23. This is a substantially rectangular frame in which the right end of the lower member 22 and the right end of the lower member 22 are connected by the right leg 23.

The left and right spacers 13 are respectively attached to the left and right sides of the front portion of the bulkhead 12.
Since the left and right spacers 13 are symmetrical members, the right spacer 13 will be described below and the description of the left spacer 13 will be omitted.

The bumper beam 14 extends in the vehicle width direction by being provided over the left and right extensions 25.
The left and right extensions 25 are provided at the front end portions of the left and right front side frames 26, respectively.

  The shock absorber 15 attached to the front surface of the bumper beam 14 is a member that deforms and absorbs shock energy when an impact is applied to the front bumper 16.

The front bumper 16 is provided in front of the left and right spacers 13 and the shock absorber 15, and the central portion 16 a faces the shock absorber 15.
The front bumper 16 is disposed with the main bumper 31 extending in the vehicle width direction between the lower member 22 of the bulkhead 12 and the substantially vertical center of the bulkhead 12. Left and right extending support portions 32 (see FIG. 1).

  As shown in FIG. 2, the main bumper 31 has a lower portion 33 attached to the lower member 22 of the bulkhead 12 with bolts 34 and nuts 35.

As shown in FIG. 1, the left extending support portion 32 is provided in a portion at a predetermined distance in the left direction from the center of the vehicle body in the upper part of the main bumper 31.
The right extending support portion 32 is a member that is symmetrical to the left extending support portion 32 and is raised at a position spaced apart from the center of the vehicle body in the right direction by a predetermined distance above the main bumper 31.

As shown in FIG. 1, a front grille 17 is provided (connected) above the main bumper 31 and between the left and right extension support portions 32.
The front grille 17 is a resin member in which a frame portion 36 is formed in a substantially inverted trapezoidal shape with a lower portion 37, an upper portion 38, and left and right side portions 39, and a plurality of louvers 42 are formed in the frame portion 36.
By using the front grille 17 as a resin member, the front grille 17 can allow a certain amount of elastic deformation.

  The lower portion 37 of the front grille 17 is connected to the upper portion 41 of the main bumper 31 by a connecting member (not shown) such as a clip, and the left portion 39 is connected to the left extension support portion 32 (not shown). ) And the right part 39 is connected to the right extension support part 32 by a connecting member (not shown) such as a clip.

Thereby, the front grille 17 is attached (connected) to the upper part 41 of the front bumper 16.
As shown in FIG. 2, the front grille 17 has an upper portion 38 attached to the upper member 21 of the bulkhead 12 with bolts 43 and nuts 44.

FIG. 3 is an enlarged view of part 3 of FIG.
The lower portion 37 of the front grille 17 and the upper portion 41 of the main bumper 31 (that is, the upper portion of the front bumper 16) are connected by a connecting member (not shown) such as a clip.
By connecting the lower portion 37 and the upper portion 41, the lower portion 37 and the upper portion 41 constitute a connecting portion 46.

The connecting portion 46 is provided with left and right engaging portions 51 (only the right engaging portion 51 is illustrated).
Since the left and right engaging portions 51 are symmetrical members, the right engaging portion 51 will be described below and the description of the left engaging portion 51 will be omitted.
The right locking portion 51 is supported by the support portion 52 of the right spacer 13 so as to be slidable in the vehicle body front-rear direction (arrow AB direction).
Hereinafter, the right locking portion 51 and the support portion 52 will be described with reference to FIGS.

FIG. 4 is a perspective view showing a state in which a main part of the vehicle body front structure according to the present invention is viewed from the front of the vehicle body, and FIG. 5 is an exploded view showing a state in which the main part of the vehicle body front structure according to the present invention is viewed from the rear of the vehicle body. It is a perspective view.
On the upper member 21 of the bulkhead 12, a left spacer 13 (not shown) is attached on the left side, and a right spacer 13 is attached on the right side.
The right spacer 13 has a left end portion (that is, a vehicle body center portion) 13 a attached to the upper member 21 of the bulkhead 12 with bolts 54 and nuts 55, and is disposed above the bumper beam 14.
The right spacer 13 is provided with a support portion 52 at the left end portion 13a.

The support portion 52 includes a bottom portion 57 formed substantially horizontally, an outer wall 58 provided substantially vertically at an outer end of the bottom portion 57, a ceiling wall 59 provided horizontally toward the upper end of the outer wall 58, and a bottom portion It is a storage recess formed by an inner stopper portion 61 provided at the inner end of 57.
In the support portion 52, a gap 60 is formed between the inner stopper portion 61 and the ceiling wall 59.
Moreover, the support part 52 formed in the concave shape is penetrated in the vehicle body front-rear direction.

Returning to FIG. 3, the bottom portion 57 has a front portion 57 a formed in an upward slope toward the rear of the vehicle body, and a horizontal portion 57 b behind the front portion 57 a formed substantially horizontally.
Further, the ceiling wall 59 is formed in a downward slope from the front end 59a toward the rear of the vehicle body.
Therefore, the space between the horizontal portion 57b and the ceiling wall 59 is formed so as to gradually narrow toward the rear of the vehicle body.
The front portion 57 a of the bottom portion 57 projects forward with respect to the front end 59 a of the ceiling wall 59.

As shown in FIG. 4, the right locking portion 51 is fitted to the support portion 52. The right locking portion 51 is provided on the front grille 17.
As shown in FIG. 1, the front grille 17 has a frame body 36 formed in a substantially inverted trapezoid shape with a lower portion 37, an upper portion 38 and left and right side portions 39, and a plurality of louvers 42 are formed in the frame body 36.
A right locking portion 51 is provided on the back side of the intersection (lower right corner) 64 of the lower portion 37 and the right side 39 of the front grille 17.

Specifically, the right locking portion 51 is provided at the right rear end portion 42 a of the lowermost louver 42 at the rear of the vehicle body of the lower right corner portion 64 of the front grill 17.
The right locking portion 51 has a vertical portion 65 that bulges downward from the right rear end portion 42 a of the lowermost louver 42, and a horizontal portion 66 that is formed near the center of the vehicle body at the lower end of the vertical portion 65.

The right locking portion 51 is formed in a substantially L shape with a vertical portion 65 and a horizontal portion 66.
The horizontal portion 66 includes an inclined plate 66a provided along the ceiling wall 59 of the support portion 52, and three leg pieces 66b provided at predetermined intervals on the lower surface of the inclined plate 66a.
The horizontal portion 66 is formed in a substantially inverted mountain shape by an inclined plate 66a and three leg pieces 66b.

By inserting the horizontal portion 66 between the bottom portion 57 of the support portion 52 and the ceiling wall 59, the inclined plate 66 a of the horizontal portion 66 abuts against the ceiling wall 59 and the leg pieces 66 b of the horizontal portion 66 are attached to the bottom portion 57. Abut.
Thereby, the horizontal part 66 is clamped by the support part 52, and is hold | maintained in the holding position P shown in FIG.

In this state, the vertical portion 65 is disposed in the gap 60 (see FIG. 5) between the inner stopper portion 61 and the ceiling wall 59.
In other words, the horizontal portion 66 can be disposed in the support portion 52 by forming the gap 60 in the support portion 52.

By the way, as shown in FIG. 3, the front portion 57a of the bottom portion 57 protrudes forward of the vehicle body with respect to the ceiling wall 59, and is formed in an upward gradient toward the rear of the vehicle body.
Therefore, when the horizontal portion 66 is fitted into the support portion 52, the horizontal portion 66 can be satisfactorily guided to the predetermined insertion position by the front portion 57a.

Further, the ceiling wall 59 of the support portion 52 is formed with a downward slope from the front portion 59a toward the rear of the vehicle body.
In addition, by bringing the leg pieces 66 b of the horizontal portion 66 into contact with the bottom portion 57, the contact area with respect to the bottom portion 57 can be kept small.

In this way, the horizontal wall 66 guided to the insertion position is formed between the bottom 57 and the ceiling wall 59 by forming the ceiling wall 59 in a downward slope toward the rear of the vehicle body and suppressing the contact area with the bottom 57 small. Guided smoothly between.
Therefore, the horizontal portion 66 is easily guided to the illustrated holding position P.

Here, the support portion 52 is formed in the housing recess by the bottom portion 57, the outer wall 58, the ceiling wall 59, and the inner stopper portion 61.
Therefore, it is possible to suppress the horizontal portion 66 from moving up and down by the bottom portion 57 and the ceiling wall 59. Further, the movement of the horizontal portion 66 in the left-right direction (vehicle body width direction) can be suppressed by the outer wall 58 and the inner stopper portion 61.
Thereby, the horizontal portion 66 guided to the holding position P is securely held by the support portion 52. Therefore, the connection part 46 of the front bumper 16 and the front grille 17 can be suitably held.

As shown in FIG. 3, when an obstacle hits the front bumper 16 and an impact in the direction of the arrow acts on the front bumper 16, the horizontal portion 66 slides from the holding position P to the rear of the vehicle body (in the direction of arrow B).
When the horizontal portion 66 slides in the direction of arrow B, the locked state by the support portion 52 is released.

Accordingly, the support of the connecting portion 46 is released, and the connecting portion 46 can be smoothly moved rearward of the vehicle body.
Thereby, the front bumper 16 can be favorably deformed according to the obstacle, and the impact energy can be suitably absorbed.

Next, a procedure for assembling the front bumper 16 and the front grille 17 to the bulkhead 12 will be described with reference to FIGS.
FIG. 6 is a view for explaining an example in which the front grille is attached to the front bumper of the vehicle body front structure according to the present invention.
The lower portion 37 of the front grille 17 is connected to the upper portion 41 of the main bumper 31 by a connecting member (not shown).
At the same time, the left and right portions 39 of the front grille 17 shown in FIG. 1 are connected to the left and right extending support portions 32 by connecting members (not shown).
Thereby, the front grille 17 is attached (connected) to the upper portion 41 of the front bumper 16 as indicated by an arrow C.

FIG. 7 is a view for explaining an example in which the front bumper and the front grill of the vehicle body front structure according to the present invention are attached to the bulkhead.
In a state where the front grille 17 and the front bumper 16 are integrally connected, the right locking portion 51 is fitted to the support portion 52 as indicated by an arrow D.
At the same time, the upper portion 38 of the front grille 17 is disposed on the upper member 21 of the bulkhead 12, and the lower portion 33 of the front bumper 16 is disposed on the lower member 22 of the bulkhead 12.

The upper part 38 of the front grille 17 is attached to the upper member 21 of the bulkhead 12 with bolts 43 and nuts 44 as indicated by arrow E.
Similarly, the lower part 33 of the front bumper 16 is attached to the lower member 22 of the bulkhead 12 with a bolt 34 and a nut 35 as indicated by an arrow F.

As a result, as shown in FIG. 2, the horizontal portion 66 of the right locking portion 51 is held in the state held by the support portion 52.
Therefore, the connection part 46 of the front bumper 16 and the front grille 17 can be suitably held.

Thus, the lower part 33 of the front bumper 16 and the upper part 38 of the front grille 17 are bolted to the bulkhead 12, and the right locking part 51 of the connecting part 46 is supported by the support part 52.
Thereby, the front bumper 16 and the front grille 17 can be firmly attached to the bulkhead 12.

Next, an example in which an impact is applied to the front bumper 16 will be described with reference to FIGS.
FIGS. 8A and 8B are diagrams illustrating an example in which an impact is applied to the front bumper of the vehicle body front structure according to the present invention.
In (a), an obstacle (not shown) hits the central portion 16a of the front bumper 16, and an impact F1 acts on the central portion 16a as shown by an arrow.
Of the impact F1, the impact F2 is transmitted to the connecting portion 46, and the transmitted impact F2 presses the horizontal portion 66 of the right locking portion 51 toward the rear of the vehicle body (in the direction of arrow B).

In (b), the horizontal portion 66 can be slid from the holding position P to the rear of the vehicle body and removed from the support portion 52.
Thereby, the latching state of the horizontal part 66 by the support part 52 can be cancelled | released.
In this state, the substantially lower half 17a of the front grille 17 is elastically deformed in a curved shape as indicated by an arrow G toward the rear of the vehicle body.

By releasing the locked state of the horizontal portion 66 by the support portion 52, the connecting portion 46 moves smoothly rearward of the vehicle body.
Therefore, the front bumper 16 can be favorably deformed according to the obstacle, and the shock absorber 15 can be favorably deformed.
Thus, impact energy can be suitably absorbed by deforming the shock absorber 15 satisfactorily.

9A and 9B are views for explaining a state where the front grille of the vehicle body front structure according to the present invention is removed.
In (a), the lower part 33 of the front bumper 16 is removed from the lower member 22 of the bulkhead 12 by removing the bolt 34.

In (b), the upper portion 38 of the front grille 17 is removed from the upper member 21 of the bulkhead 12 by removing the bolts 43.
The lower portion 37 of the front grille 17 and the left and right portions 39 (see FIG. 2) of the front grille 17 are removed from the front bumper 16.
The substantially lower half of the front grille 17 can be restored from the elastically deformed state to the state before the deformation as indicated by an arrow H.

  In the above-described embodiment, the example in which one locking portion 51 is provided on each of the left and right sides of the front grill 17 has been described. However, the number of the locking portions 51 can be arbitrarily selected.

  In the above-described embodiment, the example in which the horizontal portion 66 includes the three leg pieces 66b has been described. However, the present invention is not limited to this, and two leg pieces 66b or other plural pieces may be used. .

  Furthermore, the shapes of the locking portion 51 and the support portion 52 exemplified in the embodiment are not limited to those exemplified, and can be appropriately changed.

  The vehicle body front portion structure of the present invention is suitable for application to an automobile in which a front bumper and a front grille are respectively attached to a lower member and an upper member of a bulkhead.

It is a front view which shows the vehicle body front part structure which concerns on this invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a three-part enlarged view of FIG. 2. It is a perspective view which shows the state which looked at the principal part of the vehicle body front part structure concerning this invention from the vehicle body front. It is a disassembled perspective view which shows the state which looked at the principal part of the vehicle body front part structure concerning this invention from the vehicle body back. It is a figure explaining the example which attaches a front grille to the front bumper of the vehicle body front part structure concerning the present invention. It is a figure explaining the example which attaches the front bumper and front grill of the vehicle body front part structure which concern on this invention to a bulkhead. It is a figure explaining the example which the impact acted on the front bumper of the vehicle body front part structure concerning the present invention. It is a figure explaining the state which removed the front grill of the vehicle body front part structure concerning the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Car body front part structure, 12 ... Bulk head, 16 ... Front bumper, 17 ... Front grille, 21 ... Upper member of bulk head, 22 ... Lower member of bulk head, 33 ... Lower part of front bumper, 37 ... Front grille Lower part, 38 ... upper part of front grille, 41 ... upper part of main bumper (upper part of front bumper), 46 ... connecting part, 51 ... left and right locking part (locking part), 52 ... support part.

Claims (1)

In the vehicle body front structure in which the lower part of the front bumper is attached to the lower member of the bulkhead, the front grille is disposed above the front bumper, and the upper part of the front grille is attached to the upper member of the bulkhead.
The lower part of the front grill is connected to the upper part of the front bumper,
A locking portion is provided at a connecting portion where the upper part of the front bumper and the lower part of the front grille are connected,
A vehicle body front part structure characterized in that a support portion that supports the locking portion so as to be slidable in the longitudinal direction of the vehicle body is provided on the bulkhead side.

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