JP2022089487A - Vehicle body front structure, and method for manufacturing vehicle body front part - Google Patents

Abstract

To provide a vehicle body front structure which can efficiently bond a dash upper panel to an upper member together with a cowl side panel without providing an unnecessary work hole for welding, and a method for manufacturing a vehicle body front part.SOLUTION: An upper structure is constituted by joining a lower edge part of a cowl side panel 16 to a side wall of an upper split piece 20 in a first joint part W1. A base part structure is constituted by joining a bending flange of a dash upper panel 13 to a side wall of an upper member base part 19 in a second joint part W2. In the upper structure and the base part structure, a skeleton structure is constituted by joining a lower edge part of the cowl side panel to an edge part of a notch part 18 of a base part side wall 19s in a third joint part W3. In the skeleton structure and an upper member lid member 12, upper and lower flange parts of the upper member lid member 12 are joined to an upper wall of the upper split piece 20 and a lower wall of the upper member base part 19 in a fourth joint part W4 and a fifth joint part W5.SELECTED DRAWING: Figure 5

Description

The present invention relates to a vehicle body front structure and a method for manufacturing the vehicle body front.

As a vehicle body front structure, an upper member having a substantially rectangular cross section extends from the left and right front pillars toward the front of the vehicle, and a dash upper panel extending along the vehicle width direction is connected to the base of the upper member. (For example, see Patent Document 1).

In the vehicle body front structure described in Patent Document 1, the outer end portion of the dash upper panel in the vehicle width direction penetrates the inner side wall in the vehicle width direction of the upper member, and the bent flange provided at the end portion of the dash upper panel is the upper member. It is abutted against the outer side wall in the vehicle width direction and is fixed to the side wall by welding. A work hole for inserting a welding gun is formed on the outer side wall of the upper member in the vehicle width direction. Welding of the bent flange of the dash upper panel and the outer side wall of the upper member in the vehicle width direction is performed through the work hole. In addition, a cowl top panel that supports the lower end of the front wind seal glass is connected to the rear part of the dash upper panel, and a cowl side panel is connected to the outside of the cowl top panel in the vehicle width direction. The lower edge of the cowl side panel is fixed to the inner side wall of the upper member in the vehicle width direction by welding or the like.

Japanese Patent No. 4547610

In the above vehicle body front structure, since the outer end portion of the dash upper panel in the vehicle width direction is welded and fixed to the outer side wall across the cross section of the upper member, the end portion of the dash upper panel is high at the base portion of the upper member. It can be connected with rigidity. However, in the case of the above-mentioned vehicle body front structure, in order to weld the end portion of the dash upper panel to the side wall on the outer side in the vehicle width direction of the upper member, a work hole for welding must be formed on the side wall of the upper member. There is concern that the holes will reduce the strength of the upper member. Further, in the above-mentioned vehicle body front structure, since it is necessary to perform welding work for joining the end portion of the dash upper panel and the side wall of the upper member through the work hole, the efficiency of the joining work is poor, and this point can be improved. It is desired.

Therefore, the present invention will provide a vehicle body front structure capable of efficiently joining the dash upper panel together with the cowl side panel to the upper member without providing unnecessary welding work holes, and a method for manufacturing the vehicle body front. Is to be.

The vehicle body front structure according to the present invention adopts the following configuration in order to solve the above problems.
That is, the vehicle body front structure according to the present invention is described so as to close the opening of the upper member main body having a substantially U-shaped cross section (for example, the upper member main body 11 of the embodiment) that opens outward in the vehicle width direction. An upper member having an upper member lid member (for example, the upper member lid member 12 of the embodiment) coupled to the upper member main body (for example, the upper member 10 of the embodiment) and a lower edge portion (for example, the lower edge portion 16e of the embodiment). Is connected to the inner side wall in the vehicle width direction of the upper member body (for example, the cowl side panel 16 of the embodiment), and the outer end portion in the vehicle width direction is attached to the inner side wall in the vehicle width direction of the upper member body. A dash upper panel to be combined (for example, the dash upper panel 13 of the embodiment) is provided, and the upper member main body has a notch portion in which a part of the upper wall and the inner side wall in the vehicle width direction is continuously cut out. It is coupled to the upper member base portion having (for example, the notch portion 18 of the embodiment) (for example, the upper member base portion 19 of the embodiment) and the upper member base portion so as to substantially close the notch portion. The upper division piece (for example, the upper division piece 20 of the embodiment) is provided, and the cowl side panel and the upper division piece are the lower edge portion of the cowl side panel and the division piece side wall of the upper division piece (for example). , The split side wall 20s of the embodiment) is joined at the first joint portion (for example, the first joint portion W1 of the embodiment) to form an upper structure (for example, the upper structure 24 of the embodiment). The dash upper panel and the upper member base portion are a bent flange (for example, the bent flange 13f of the embodiment) provided by bending upward at an end portion of the dash upper panel and a side wall of the base portion of the upper member base portion. (For example, the base portion side wall 19s of the embodiment) is joined at the second joint portion (for example, the second joint portion W2 of the embodiment), and the base portion structure (for example, the base portion structure 26 of the embodiment) is joined. In the upper structure and the base portion structure, the lower edge portion of the cowl side panel and the edge portion of the notch portion of the side wall of the base portion form a third joint portion (for example, of the embodiment). It is joined by the third joint portion W3) to form a skeletal structure (for example, the skeletal structure 27 of the embodiment), and the skeletal structure and the upper member lid member are upper and lower ends of the upper member lid member. Each flange portion extending outward in the vehicle width direction from the portion (for example, the flange portions 12fu, 12fl of the embodiment) ) Joins the fourth joint (eg, the base portion lower wall 19l of the embodiment) with the split piece upper wall of the upper split piece (for example, the split piece upper wall 20u of the embodiment) and the base portion lower wall of the upper member base portion (for example, 19l). It is characterized in that it is joined by the fourth joint portion W4) and the fifth joint portion (for example, the fifth joint portion W5 of the embodiment), respectively.

According to the above configuration, the upper structure is configured by joining the lower edge portion of the cowl side panel and the split side wall of the upper split piece at the first joint portion. Since the upper split piece is a separate member from the large upper member base portion of the upper member main body, it can be easily joined to the lower edge portion of the cowl side panel by sandwiching spot welding at the first joint portion.
The base portion structure is configured by joining the bent flange at the end of the dash upper panel and the side wall of the base portion of the upper member base portion at the second joint portion. Since the upper member base portion is provided with a notch portion in which a part of the upper wall and the side wall is continuously cut out, the bent flange at the end of the dash upper panel and the side wall of the base portion are second to each other. In the welded portion, it can be easily joined by sandwiching spot welding.
The skeletal structure is configured by joining the lower edge portion of the cowl side panel and the edge portion of the notch portion of the side wall of the base portion at the third joint portion. Since the circumference of the lower edge of the cowl side panel and the side wall of the base is not a bag structure, the lower edge of the cowl side panel and the side wall of the base should be easily joined by sandwiching spot welding at the third weld. Can be done.
In the skeleton structure and the upper member lid member configured as described above, the upper flange portion of the upper member lid member is joined to the upper wall of the split piece of the upper split piece at the fourth joint portion, and the lower side of the upper member lid member is joined. The flange portion of the upper member is joined to the lower wall of the base portion of the upper member base portion at the fifth joint portion. Since the periphery of each of the 4th joint and the 5th connection is not a bag structure, the upper member lid member is easily sandwiched between the upper wall of the split piece and the lower wall of the base at the 4th joint and the 5th joint by spot welding. Can be joined to.

The lower edge portion of the cowl side panel is overlapped with the inner side surface of the base portion side wall of the upper member base portion in the vehicle width direction and joined by the third joint portion, and the lower edge portion of the cowl side panel is formed. A guide wall (for example, the guide wall 25 of the embodiment) that is inclined outward in the vehicle width direction toward the lower side may be provided below the third joint portion.

In this case, when the upper structure is assembled from above to the base structure, the edge of the notch of the upper member base abuts on the guide wall of the cowl side panel, so that the lower edge of the cowl side panel is contacted. The portion can be guided to a position overlapping the inner side surface of the side wall of the base portion in the vehicle width direction. Therefore, when this configuration is adopted, the superstructure can be efficiently assembled to the base structure.

The rear portion of the upper split piece of the superstructure is supported from below by the rear portion of the dash upper panel, and the front portion of the upper split piece of the superstructure is the base portion upper wall of the upper member base portion ( For example, it may be supported from below by the base portion upper wall 19u) of the embodiment.

In this case, when the superstructure is assembled from above with respect to the base structure, the front and rear of the upper split piece are supported from below by the base upper wall and the rear part of the dash upper panel, so that the superstructure is an upper member. It can be positioned accurately in the vertical direction with respect to the base portion. Therefore, when this configuration is adopted, it is possible to more efficiently assemble the superstructure to the base structure.

Between the split side wall and the base side wall located below the split side wall, a drainage port for draining water droplets from the upper surface of the dash upper panel into the cross section of the upper member (for example, the drainage port of the embodiment). 22f, 22r) may be provided, and the third joint may be provided in the vicinity of the drainage port.

In this case, the vicinity of the portion where the strength is reduced due to the formation of the drainage port in the side wall of the base portion of the upper member base portion can be reinforced by the third joint portion.

Below the notch in the upper member base portion, the vertical cross section is substantially L-shaped, and the upper member base portion is joined to the vehicle outer surface of the side wall of the base portion and the upper surface of the lower wall of the base portion. A stiffener (for example, the stiffener 28 of the embodiment) is arranged, and the stiffener is a reinforcing joint in which a plurality of welding points (for example, welding points P of the embodiment) with the side wall of the base portion are lined up in the vertical direction below the drain port. It may be configured to have a portion (for example, the reinforcing joint portion 30 of the embodiment).

In this case, the lower part of the side wall of the base portion of the upper member base portion where the drainage port is formed can be reinforced by the reinforcing joint portion of the stiffener.

At least one of the plurality of welding points constituting the reinforcing joint portion is a joint portion to be joined to a damper base (for example, the damper base 17 of the embodiment) that supports the upper part of the damper of the suspension. Is desirable.

In this case, since the damper base, which is a strong part that is not easily deformed even when subjected to an impact load, is joined to at least one welding point of the reinforcing joint portion, the drainage port in the side wall of the base portion of the upper member base portion is formed. The strength in the vicinity of the formed portion can be further increased.

The cowl side panel is integrally connected to the outer end portion in the vehicle width direction of the cowl top panel (for example, the cowl top panel 15 of the embodiment) that supports the lower end of the front wind seal glass, and the dash upper panel is the said. A damper base (for example, the damper base 17 of the embodiment) that supports the upper part of the damper of the suspension is arranged inside the upper member in the vehicle width direction in a box shape together with the cowl top panel and the cowl side panel. The damper base may be coupled to the upper member and the lower surface of the dash upper panel.

In this case, the damper base is coupled to the lower surface of the dash upper panel having a box shape together with the cowl top panel and the cowl side panel, and the upper member having a closed cross section. Therefore, the upper part of the suspension can be supported by the vehicle body with high rigidity through the damper base.

The rear portion of the upper member lid member may be mechanically coupled to the outer surface of the front pillar (for example, the front pillar 3 of the embodiment) in the vehicle width direction.

In this case, since the rear portion of the upper member is supported by the front pillar with high rigidity, the support rigidity of the upper part of the suspension through the damper base can be further increased.

The dash upper panel is formed in a hat-shaped cross-sectional shape in which a cross section intersecting the vehicle width direction opens upward, and a cowl top panel having a trailing edge supporting the lower end of the front wind seal glass (for example, implemented). The cowl top panel 15) of the embodiment and the dash lower panel (for example, the dash lower panel 14 of the embodiment) may be coupled.

In this case, since the dash upper panel has a hat-shaped cross-sectional shape that opens upward, the rigidity of the dash upper panel can be increased and the drainage of water droplets flowing into the cross section of the dash upper panel can be improved. ..

The method for manufacturing the front part of the vehicle body according to the present invention adopts the following configuration in order to solve the above problems.
An upper member main body having a substantially U-shaped cross section (for example, the upper member main body 11 of the embodiment) that opens outward in the vehicle width direction and an upper member lid member (for example, an upper member lid member) that is coupled to the upper member main body so as to close the opening of the upper member main body. The upper member lid member 12) of the embodiment, the upper member having the upper member (for example, the upper member 10 of the embodiment), and the lower edge portion (for example, the lower edge portion 16e of the embodiment) are on the inner side wall of the upper member main body in the vehicle width direction. A cowl side panel to be combined (for example, the cowl side panel 16 of the embodiment) and a dash upper panel (for example, of the embodiment) in which the outer end portion in the vehicle width direction is connected to the inner side wall in the vehicle width direction of the upper member main body. A dash upper panel 13) is provided, and the upper member main body has a notch portion (for example, the notch portion 18 of the embodiment) in which a part of the upper wall and the inner side wall in the vehicle width direction is continuously cut out. The upper member base portion (for example, the upper member base portion 19 of the embodiment) and the upper division piece (for example, the upper division piece of the embodiment) to be joined to the upper member base portion so as to substantially close the notch portion. 20), and in the method for manufacturing the front portion of the vehicle body, the lower edge portion of the cowl side panel and the split side wall of the upper split piece (for example, the split side wall 20s of the embodiment) are joined to each other. The step of forming the upper structure (for example, the upper structure 24 of the embodiment), the bent flange at the end of the dash upper panel (for example, the bent flange 13f of the embodiment), and the side wall of the base portion of the upper member base portion. A step of joining (for example, the base side wall 19s of the embodiment) to form a base structure (for example, the base structure 26 of the embodiment) and the lower part of the cowl side panel of the superstructure. The step of joining the edge portion and the edge portion of the notch portion of the side wall of the base portion of the base portion structure to form a skeleton structure, and the outer side in the vehicle width direction from the upper and lower ends of the upper member lid member. Each flange portion (for example, the flange portions 12fu, 12fl of the embodiment) extending to the above is the divided piece upper wall (for example, the divided piece upper wall 20u of the embodiment) and the upper member base portion of the upper divided piece of the skeleton structure. It is characterized by having a step of joining to the lower wall of the base portion (for example, 19 l of the lower wall of the base portion of the embodiment).

In the vehicle body front structure according to the present invention, the vehicle body front can be manufactured by the following method.
First, the lower edge of the cowl side panel and the split side wall of the upper split piece are joined at the first joint to form the superstructure, and the bent flange of the dash upper panel and the base side wall of the upper member base are joined. Is joined at the second joint to form a base structure, and then the lower edge of the cowl side panel and the edge of the notch on the side wall of the base are joined at the third joint to form a skeletal structure. To form. After this, the upper flange portion of the upper member lid member is joined to the upper wall of the split piece of the upper split piece at the fourth joint portion, and the lower flange portion of the upper member lid member is fifth joined to the lower wall of the base portion of the upper member base portion. Join at the part.
Therefore, when the vehicle body front structure according to the present invention is adopted, the dash upper panel can be efficiently joined to the upper member together with the cowl side panel without providing unnecessary welding work holes.

The perspective view of the skeleton part of the front part of the vehicle of embodiment. The perspective view which showed the skeleton part of the front part of the vehicle of an embodiment by removing some parts. The side view which showed the skeleton part of the front part of the vehicle of an embodiment by removing some parts. The perspective view of the skeleton part of the front part of the vehicle of embodiment. FIG. 6 is a cross-sectional view taken along the line VV of FIG. FIG. 2 is a cross-sectional view taken along the line VI-VI of FIG. FIG. 2 is a partial cross-sectional perspective view in which the skeleton portion of the front portion of the vehicle of the embodiment is cross-sectionald by the VII-VII line portion of FIG. The cross-sectional view corresponding to FIG. 5 which shows the assembling process of the front part of the vehicle body of an embodiment. The cross-sectional view corresponding to FIG. 5 which shows the assembling process of the front part of the vehicle body of an embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the appropriate place in the drawing, an arrow FR pointing to the front of the vehicle 1, an arrow UP pointing to the upper side of the vehicle 1, and an arrow LH pointing to the left side of the vehicle 1 are written. Further, the skeleton portion of the front portion of the vehicle body of the vehicle 1 is formed substantially symmetrically. Therefore, in the following, the structure on the left side of the vehicle will be described, and the description of the structure on the right side will be omitted.

FIG. 1 is a perspective view of the front portion of the vehicle body of the vehicle 1 of the embodiment as viewed from above the front left portion of the vehicle 1.
In the vehicle 1, a side sill 2 which is a skeleton member extending along the front-rear direction of the vehicle body is arranged below the side portion of the passenger compartment. A front pillar 3 which is a skeletal member rising vertically upward from the front end portion of the side sill 2 is arranged in front of the side portion of the passenger compartment. A front side frame 4 is connected to the front end portion of the side sill 2 via a connecting frame (not shown) extending inward in the vehicle width direction. The front side frame 4 extends toward the front side of the vehicle at a position offset inward in the vehicle width direction with respect to the side sill 2, and mainly supports a drive unit including an engine, a motor, and the like.

Further, an upper member 10 extending toward the front of the vehicle while gently curving downward from the front pillar 3 is connected to the upper region of the front pillar 3. The upper member 10 is a skeleton member extending toward the front side of the vehicle on the outer side in the vehicle width direction with respect to the front side frame 4. The front end portion of the upper member 10 is substantially the same height as the front end portion of the front side frame 4. The front end of the upper member 10 and the front end of the front side frame 4 inside the upper member 10 are connected by a gusset 5.

The upper member 10 includes an upper member main body 11 having a substantially U-shaped cross section that opens outward in the vehicle width direction, and an upper member lid member 12 that is connected to the upper member main body 11 so as to close the opening of the upper member main body 11. The upper member 10 is formed in a vertically long substantially rectangular cross-sectional shape whose vertical dimension is longer than the horizontal dimension.

The end of the dash upper panel 13 extending along the vehicle width direction is connected to the base of the upper member 10 (the end near the passenger compartment). The dash upper panel 13 is formed in a hat-shaped cross-sectional shape in which a cross section intersecting the vehicle width direction opens upward. The trailing edge of the dash upper panel 13 is connected to the upper end of the dash lower panel 14 that separates the passenger compartment from the engine room. A cowl top panel 15 that supports the lower end of the front windshield glass (not shown) is connected to the trailing edge of the dash upper panel 13. The cowl top panel 15 extends along the vehicle width direction above the dash upper panel 13. The central region of the cowl top panel 15 in the vehicle width direction is joined to the leading edge portion of the dash upper panel 13 and forms a box shape together with the dash upper panel 13.
A cowl side panel 16 having a substantially triangular side view is connected to the outer end of the cowl top panel 15 in the vehicle width direction. The lower edge portion of the cowl side panel 16 is connected to the inner side wall in the vehicle width direction on the root portion side of the upper member 10.

Further, in the side wall on the inner side in the vehicle width direction on the root side of the upper member 10, the portion below the connecting portion with the dash upper panel 13 is a damper base that supports the upper part of the damper (not shown) on the front side suspension. 17 are connected. The upper surface of the damper base 17 is connected to the lower surface of the vehicle width direction outer region of the dash upper panel 13. The damper base 17 is formed of a thick metal plate.

FIG. 2 is a perspective view in which the upper member lid member 12 is removed from the upper member 10 and the front portion of the vehicle body is viewed from above the left front portion of the vehicle 1. FIG. 3 is a side view of the front part of the vehicle body as viewed from the left side of the vehicle 1 by removing the upper member lid member 12 from the upper member 10. Further, FIG. 4 is a perspective view of the left front portion of the vehicle body as viewed from above the front portion of the vehicle 1 on the engine room side.
As shown in these figures, the upper member main body 11 has an upper member base portion 19 in which a part of the upper wall on the root portion side and a part of the inner side wall in the vehicle width direction is continuously cut out, and the upper member base portion 19. It includes an upper split piece 20 coupled to an upper member base portion 19 so as to substantially close the notch portion 18.

In the following, the side wall of the upper member base portion 19 that is vertically erected is referred to as the base portion side wall 19s, and the upper wall extending outward from the upper end portion of the base portion side wall 19s in the vehicle width direction is referred to as the base portion upper wall 19u and the base portion side wall. The lower wall extending outward in the vehicle width direction from the lower end portion of 19s is referred to as a base portion lower wall 19l. Further, the side wall of the upper split piece 20 that is vertically erected is referred to as a split side wall 20s, and the upper wall extending outward from the upper end portion of the split piece side wall 20s in the vehicle width direction is referred to as a split piece upper wall 20u.

As shown in FIG. 3, the notch 18 of the upper member base portion 19 has a part of the base portion upper wall 19u cut off over the entire area in the vehicle width direction, and a part of the base portion side wall 19s is cut off at the upper end. The shape is excised from the portion over a predetermined height range. However, the lower end of the notch 18 of the side wall 19s of the base portion does not extend linearly in the front-rear direction of the vehicle body, but is recessed downward in the front-rear direction of the straight portion in the central region 21f, 21r. Is formed. When the upper division piece 20 is attached to the upper member base portion 19, the recessed portions 21f and 21r in the front and rear of the notch portion 18 are connected to the lower end of the division piece side wall 20s of the upper division piece 20 with the drainage port 22f. Form 22r. The drainage ports 22f and 22r are holes for draining water droplets flowing into the upper surface of the dash upper panel 13 into the cross section of the upper member 10, and the ends of the front and rear gutter grooves 23f and 23r of the dash upper panel 13 described later are. Will be inserted.

5 is a cross-sectional view taken along the line VV of FIG. 1, and FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. Further, FIG. 7 is a partial cross-sectional perspective view of the front portion of the vehicle body, which is cross-sectionald by the VII-VII line portion of FIG.
The lower edge portion 16e of the cowl side panel 16 is overlapped with the inner surface of the divided single side wall 20s of the upper divided piece 20 in the vehicle width direction, and is joined to the divided single side wall 20s by spot welding in that state. This joint portion (see FIG. 5) is referred to as a first joint portion W1. The cowl side panel 16 and the upper split piece 20 thus joined at the first joint portion W1 form the upper structure 24 in the present embodiment (see FIG. 8).
In the lower edge portion 16e of the cowl side panel 16, below the first joint portion W1 (below the third joint portion W3 described later), a guide that inclines outward in the vehicle width direction toward the lower side. A wall 25 is provided.

Further, the pair of gutter groove portions 23f and 21r described above are formed in the outer region of the dash upper panel 13 in the vehicle width direction. One gutter groove portion 23f is formed closer to the front side of the dash upper panel 13, and the other gutter groove portion 21r is formed closer to the rear side of the dash upper panel 13. Each of the pair of gutter groove portions 23f is recessed downward, and the outer end portion in the vehicle width direction protrudes into the drainage ports 22f and 22r. Of the outer ends of the dash upper panel 13 in the vehicle width direction, the portions sandwiched between the front and rear gutter grooves 23f and 21r are provided with bending flanges 13f bent in a substantially L shape on the upper side. ..

The bent flange 13f is abutted against the inner surface of the base portion side wall 19s of the upper member base portion 19 in the vehicle width direction, and is joined to the base portion side wall 19s by spot welding in that state. This joint portion is referred to as a second joint portion W2. The dash upper panel 13 and the upper member base portion 19 thus joined by the second joining portion W2 constitute the base portion structure 26 in the present embodiment (see FIG. 8).

In the upper structure 24, the lower edge portion 16e of the cowl side panel 16 is superposed on the inner surface in the vehicle width direction of the edge portion of the notch portion 18 of the base portion side wall 19s of the base portion structure 26, and the base is in that state. It is joined to the side wall 19s by spot welding. This joint portion is referred to as a third joint portion W3. The superstructure 24 and the base structure 26 thus joined by the third joint W3 constitute the skeleton structure 27 in the present embodiment (see FIG. 9).
The position of the third joint portion W3 on the side wall surface 19s of the base portion is set in the region between the front and rear recessed portions 21f and 21r (drainage ports 22f and 22r) in the edge portion of the notch portion 18. Therefore, the third joint portion W3 is provided in the vicinity of the drainage ports 22f and 22r.

When the superstructure 24 is joined to the base structure 26 at the third joint W3, the superstructure 24 is lowered from above the base structure 26, and the lower edge portion of the cowl side panel 16 of the superstructure 24 is lowered. The 16e is superposed on the vehicle outer surface of the base side wall 19s of the base structure 26. At this time, since the lower edge portion 16e of the cowl side panel 16 is provided with the inclined guide wall 25, the lower edge portion 16e of the cowl side panel 16 and the side wall portion 19s of the base portion are provided by the guide function by the guide wall 25. It can be easily overlapped at the regular position.

Further, in the upper split piece 20 of the upper structure 24, at this time, the front edge portion 20uf and the trailing edge portion 20ur of the split piece upper wall 20u are on the front side and the rear side of the notch portion 18 of the base portion upper wall 19u, respectively. It is superimposed on the upper surface of each edge portion 19uf, 19ur. In the present embodiment, the rear edge portion 19ur of the notch portion 18 in the base portion upper wall 19u is formed by a separate member from the other portion of the upper member base portion 19. The rear edge portion 19ur is also joined to the rear portion of the front pillar 3 and the dash upper panel 13. Therefore, the rear portion of the upper split piece 20 is supported from below by the rear portion of the dash upper panel 13, and the front portion of the upper split piece 20 is the front edge portion 19uf of the base portion upper wall 19u of the upper member base portion 19. It is supported from below.

The upper member lid member 12 has a side wall portion 12s that hangs vertically upward, and flange portions 12fu and 12fl that extend outward in the vehicle width direction from the upper and lower ends of the side wall 12s. The upper member lid member 12 is assembled to the above-mentioned skeletal structure 27. The upper member lid member 12 is arranged between the upper wall and the lower wall of the upper member main body 11 of the skeleton structure 27. Specifically, in the region where the notch portion 18 does not exist, it is arranged between the base portion upper wall 19u and the base portion lower wall 19l of the upper member base portion 19, and in the region where the notch portion 18 exists, the upper division piece It is arranged between the upper wall 20u of the divided pieces 20 and the lower wall 19l of the base portion of the upper member base portion 19.

In the skeleton structure 27 and the upper member lid member 12, the upper flange portion 12fu of the upper member lid member 12 is joined to the base portion upper wall 19u and the split piece upper wall 20u by spot welding, and the lower flange of the upper member lid member 12 is joined. The portion 12fl is joined to the base portion lower wall 19l by spot welding. The joint portion between the upper flange portion 12fu of the upper member lid member 12 and the split piece upper wall 20u is referred to as a fourth joint portion W4, and the joint portion between the lower flange portion 12fl of the upper member lid member 12 and the base portion lower wall 19l is referred to as a fifth joint portion. It is referred to as a joint W5.

Further, as shown in FIG. 1, the trailing edge portion 12sr of the side wall 12s of the upper member lid member 12 extends to the rear side of the vehicle from the rear end portion of the upper member main body 11. The trailing edge portion 12sr of the upper member lid member 12 is overlapped with the outer surface of the front pillar 3 in the vehicle width direction, and is fastened and fixed to the front pillar 3 by a plurality of bolts 32. That is, the rear portion of the upper member lid member 12 is mechanically coupled to the outer surface of the front pillar 3 in the vehicle width direction.

By the way, below the notch 18 in the upper member base portion 19, as shown in FIGS. 2, 3, 7, and 8, the vertical cross section is substantially L-shaped, and the side wall surface 19s of the base portion is formed. A stiffener 28 to be joined to the outer surface of the vehicle and the upper surface of the lower wall 19l of the base portion is arranged. The stiffener 28 extends in the front-rear direction of the vehicle centering on the lower position of the recessed portion 21f (front drainage port 22f) on the front side of the notch portion 18. The stiffener 28 has a plurality of portions of the side wall 28s and the lower wall 28l joined to the base side wall 19s and the base lower wall 19l by spot welding.

A tongue piece portion 29 extending upward is provided at substantially the center of the side wall 28s of the stiffener 28 in the front-rear direction. The leading edge portion of the tongue piece portion 29 and the lower portion thereof of the side wall 28s are reinforced joint portions 30 in which a plurality of welding points P with the base side wall 19s are lined up in the vertical direction (three in the present embodiment). .. The plurality of welding points P of the reinforcing joint portion 30 are arranged at positions below the drainage port 22f on the front side.

Further, as shown in FIGS. 6 and 7, the damper base 17 described above is provided with a joint flange 17f that bends downward at an end portion on the outer side in the vehicle width direction. The joint flange 17f is superposed on the overlapping portion of the stiffener 28 and the side wall surface 19s of the base portion from the inside in the vehicle width direction of the side wall surface 19s of the base portion. It is welded and fixed to the stiffener 28.
In the present embodiment, the damper base 17, the upper member base portion 19, and the stiffener 28 are joined only at the uppermost welding point P, but they may be welded at other welding points P as well.

(Manufacturing method of the front part of the car body)
Subsequently, with reference to FIGS. 8 and 9, the main manufacturing method of the main part of the front part of the vehicle body described above will be described. 8 and 9 are cross-sectional views corresponding to FIG. 5 showing an assembling process of the front portion of the vehicle body.
First, as shown on the upper side of FIG. 8, the lower edge portion 16e of the cowl side panel 16 is abutted against the inner side surface of the split piece side wall 20s of the upper split piece 20 in the vehicle width direction, and in that state, the first joint portion W1 The lower edge portion 16e of the cowl side panel 16 is spot welded to the split side wall surface 20s. This forms the superstructure 24.

On the other hand, as shown on the lower side of FIG. 8, the bent flange 13f at the end of the dash upper panel 13 is abutted against the inner side surface of the base portion side wall 19s of the upper member base portion 19 in the vehicle width direction, and in that state, the second The bent flange 13f of the dash upper panel 13 is spot welded to the side wall surface 19s of the base portion at the joint portion W2. As a result, the base portion structure 26 is formed.

After that, the lower edge portion 16e of the cowl side panel 16 of the upper structure 24 is superposed on the outer surface of the side wall 19s of the base portion in the vehicle width direction at a position of the notch portion 18 (see the arrow in FIG. 8). In this state, as shown in FIG. 9, the lower edge portion 16e of the cowl side panel 16 is spot welded to the base portion side wall 19s at the third joint portion W3. As a result, the skeletal structure 27 is formed.

After that, as shown by the arrow in FIG. 9, the upper member lid member 12 is inserted into the outward opening of the upper member base portion 19 and the upper split piece 20 of the skeleton structure 27, and the upper member lid member 12 is inserted. The upper and lower flange portions 12fu and 12fl are overlapped with the divided piece upper wall 20u and the base portion lower wall 19l. At the position where the notch portion 18 of the upper member base portion 19 is not provided, the upper flange portion 12fu of the upper member lid member 12 is overlapped with the base portion upper wall 19u. Next, in this state, each superposition portion is spot welded. The upper flange portion 12fu of the upper member lid member 12 is spot welded to the split piece upper wall 20u of the upper split piece 20 at the fourth joint portion W4, and the lower flange portion 12fl of the upper member lid member 12 is the base of the upper member base portion 19. Spot weld to the lower wall 19l at the fifth joint W5.

(Effect of embodiment)
As described above, in the present embodiment, the upper structure 24 is configured by joining the lower edge portion 16e of the cowl side panel 16 and the split side wall 20s of the upper split piece 20 at the first joint portion W1. Since the upper split piece 20 is a separate member separated from the upper member base portion 19, it can be easily joined to the cowl side panel 16 by sandwiching spot welding at the first joining portion W1.

Further, the base portion structure 26 is configured by joining the bent flange 13f of the dash upper panel 13 and the base portion side wall 19s of the upper member base portion 19 at the second joint portion W2. The upper member base portion 19 is provided with a notch portion 18 in which a part of the upper wall and the side wall is continuously cut out. Therefore, the bent flange 13f of the dash upper panel 13 and the side wall surface 19s of the base portion can be easily joined by sandwiching spot welding at the second joining portion W2 by using the notch portion 18.

Further, the skeleton structure 27 is configured by joining the lower edge portion 16e of the cowl side panel 16 and the edge portion of the notch portion 18 of the base portion side wall 19s at the third joint portion W3. Since the peripheral region of the lower edge portion 16e of the cowl side panel 16 and the side wall portion 19s of the base portion does not have a bag structure, the lower edge portion 16e of the cowl side panel 16 and the side wall portion 19s of the base portion are sandwiched spots in the third joint portion W3. It can be easily joined by welding.

Further, in the skeleton structure 27 and the upper member lid member 12, the upper flange portion 14fu of the upper member lid member 12 is joined to the divided piece upper wall 20u at the fourth joint portion W4, and the lower flange of the upper member lid member 12 is joined. The portion 14fl is joined to the base portion lower wall 19l at the fifth joining portion W5. Since the periphery of each of the fourth joint portion W4 and the fifth joint portion W5 does not have a bag structure, the upper member lid member 12 has a split piece upper wall 20u and a base portion lower wall in the fourth joint portion W4 and the fifth joint portion W5. It can be easily joined by sandwiching it in 19 liters and spot welding.

Therefore, when the vehicle body front structure of the present embodiment is adopted, the dash upper panel 13 can be efficiently joined to the upper member 10 together with the cowl side panel 16 without providing unnecessary welding work holes.

Further, in the vehicle body front structure of the present embodiment, a guide wall 25 is provided at a position below the third joint portion W3 of the lower edge portion of the cowl side panel 16 so as to be inclined outward in the vehicle width direction toward the lower side. Has been done. Therefore, when the upper structure 24 is assembled to the base portion structure 26 from above, the edge portion of the notch portion 18 of the upper member base portion 19 comes into contact with the guide wall 25 of the cowl side panel 16. The lower edge portion 16e of the cowl side panel 16 can be guided to a position overlapping the inner side surface in the vehicle width direction of the base portion side wall 19s. Therefore, when the vehicle body front structure of the present embodiment is adopted, the upper structure 24 can be efficiently assembled to the base structure 26.

Further, in the vehicle body front structure of the present embodiment, the trailing edge portion 20ur of the upper split piece 20 of the upper structure 24 is supported from below by the rear portion of the dash upper panel 13, and the upper split piece 20 of the upper structure 24 is supported. The front edge portion 20uf of the upper member base portion 19 is supported from below by the base portion upper wall 19u of the upper member base portion 19. Therefore, when the upper structure 24 is assembled to the base portion structure 26 from above, the front and rear of the upper split piece 20 are supported from below by the base portion upper wall 19u and the rear portion of the dash upper panel 13. Therefore, when this configuration is adopted, the upper structure 24 can be accurately positioned vertically on the upper member base portion 19, so that the assembly of the upper structure 24 to the base portion structure 26 is more efficient. You can do it well.

Further, in the vehicle body front structure of the present embodiment, the third joint portion for joining the base portion side wall 19s and the cowl side panel 16 in the vicinity of the drainage port 22f (the recessed portion 21f of the notch portion 18) of the base portion side wall 19s. W3 is provided. Therefore, the vicinity of the portion where the strength is lowered due to the formation of the drainage port 22f (the recessed portion 21f of the notch portion 18) in the side wall 19s of the base portion can be efficiently reinforced by the third joint portion W3. ..

Further, in the vehicle body front structure of the present embodiment, a stiffener 28 having a substantially L-shaped cross section is arranged below the notch 18 of the upper member base portion 19, and the reinforcing joint portion 30 of the stiffener 28 is a drainage port 22f. At the bottom, a plurality of welding points P arranged in the vertical direction are joined to the side wall surface 19s of the base portion. Therefore, the lower part of the side wall surface 19s of the base portion where the drainage port 22f (the recessed portion 21f of the notch portion 18) is formed can be reinforced by the reinforcing joint portion 30 of the stiffener 28.

Further, the vehicle body front structure of the present embodiment is a joint portion in which at least one welding point P of the reinforcing joint portion 30 is joined to the damper base 17. Therefore, the strength in the vicinity of the portion of the side wall surface 19s of the base portion where the drainage port 22f (the recessed portion 21f of the notch portion 18) is formed can be further increased. That is, since the damper base 17 is a thick and strong part that is not easily deformed even when subjected to an impact load, the rigidity in the vicinity of the drain port 22f can be further increased by utilizing the rigidity of the damper base 17.

Further, in the vehicle body front structure of the present embodiment, the cowl side panel 16 is integrally connected to the outer end portion of the cowl top panel 15 in the vehicle width direction, and the dash upper panel 13 is together with the cowl top panel 15 and the cowl side panel 16. It has a box shape. The damper base 17 that supports the upper portion of the damper of the suspension is coupled to the upper member 10 and the lower surface of the dash upper panel 13 at the inner position of the upper member 10 in the vehicle width direction. Therefore, when this configuration is adopted, the damper base 17 is coupled to the lower surface of the dash upper panel 13 having a box shape and the upper member 10 having a closed cross section, so that the upper part of the suspension is a damper. The vehicle body can be supported with high rigidity through the base 17.

Further, in the vehicle body front structure of the present embodiment, the trailing edge portion 12sr of the upper member lid member 12 is mechanically coupled to the outer surface of the front pillar 3 in the vehicle width direction. Therefore, the support rigidity of the upper part of the suspension through the damper base 17 can be further increased.

Further, in the vehicle body front structure of the present embodiment, the dash upper panel 13 is formed in a hat-shaped cross-sectional shape in which the cross section intersecting the vehicle width direction opens upward, and the rear edge portion is the cowl top panel 15 and the dash lower panel. Combined with 14. Therefore, the rigidity of the dash upper panel 13 can be increased, and the drainage property of the water droplets flowing into the cross section of the dash upper panel 13 can be improved.

The present invention is not limited to the above embodiment, and various design changes can be made without departing from the gist thereof.

3 ... Front pillar 10 ... Upper member 11 ... Upper member body 12 ... Upper member lid member 12fu, 12fl ... Flange part 13 ... Dash upper panel 13f ... Bending flange 15 ... Cowl top panel 16 ... Cowl side panel 16e ... Lower edge part 17 ... Damper base 18 ... Notch 19 ... Upper member Base 19s ... Base side wall 19u ... Base upper wall 19l ... Base lower wall 20 ... Upper split piece 20s ... Split piece side wall 20u ... Split piece upper wall 22f, 22r ... Drain port 24 ... Superstructure 25 ... Guide wall 26 ... Base structure 27 ... Skeletal structure 28 ... Stiffna 30 ... Reinforcing joint P ... Joint point W1 ... First joint W2 ... Second joint W3 ... Third joint W4 ... 4th joint W5 ... 5th joint

Claims (10)

An upper member having an upper member main body having a substantially U-shaped cross section that opens outward in the vehicle width direction, and an upper member lid member coupled to the upper member main body so as to close the opening of the upper member main body.
A cowl side panel whose lower edge is connected to the inner side wall in the vehicle width direction of the upper member body,
A dash upper panel whose outer end in the vehicle width direction is coupled to the inner side wall in the vehicle width direction of the upper member main body is provided.
The upper member body is
An upper member base part having a notch in which a part of the upper wall and the inner side wall in the vehicle width direction is continuously cut out,
The upper dividing piece, which is coupled to the upper member base portion so as to substantially close the notch portion, is provided.
The cowl side panel and the upper divided piece form an upper structure by joining the lower edge portion of the cowl side panel and the divided side wall of the upper divided piece at a first joint portion.
The dash upper panel and the upper member base portion are formed by joining a bent flange provided by bending upward at an end portion of the dash upper panel and a side wall of the base portion of the upper member base portion at a second joint portion. , Consists of the base structure,
The superstructure and the base structure are formed by joining the lower edge of the cowl side panel and the edge of the notch on the side wall of the base at a third joint to form a skeletal structure. death,
In the skeleton structure and the upper member lid member, each flange portion extending outward in the vehicle width direction from the upper and lower ends of the upper member lid member is the upper wall of the split piece of the upper split piece and the base portion of the upper member base portion. A vehicle body front structure characterized in that it is joined to the wall by a fourth joint and a fifth joint, respectively. The lower edge portion of the cowl side panel is overlapped with the inner side surface of the base portion side wall of the upper member base portion in the vehicle width direction and joined by the third joint portion.
Claim 1 is characterized in that a guide wall is provided below the third joint portion of the lower edge portion of the cowl side panel so as to be inclined outward in the vehicle width direction toward the lower side. The front structure of the car body described in. The rear portion of the upper split piece of the superstructure is supported from below by the rear portion of the dash upper panel.
The vehicle body front structure according to claim 2, wherein the front portion of the upper split piece of the upper structure is supported from below by the upper wall of the base portion of the upper member base portion. A drainage port for draining water droplets from the upper surface of the dash upper panel into the cross section of the upper member is provided between the split side wall and the side wall of the base portion located below the split side wall. The vehicle body front structure according to claim 1, wherein the third joint is provided in the vicinity thereof. Below the notch in the upper member base portion, the cross section in the vertical direction is substantially L-shaped, and the upper member base portion is joined to the vehicle outer surface of the side wall of the base portion and the upper surface of the lower wall of the base portion. Stiffna is placed,
The vehicle body front structure according to claim 4, wherein the stiffener has a reinforcing joint portion in which a plurality of welding points with the side wall of the base portion are arranged in the vertical direction below the drainage port. The fifth aspect of claim 5, wherein at least one of the plurality of welding points constituting the reinforcing joint portion is a joint portion to be joined to a damper base supporting the upper portion of the damper of the suspension. The front structure of the car body. The cowl side panel is integrally connected to the outer end portion of the cowl top panel supporting the lower end of the front wind seal glass in the vehicle width direction.
The dash upper panel forms a box shape together with the cowl top panel and the cowl side panel.
A damper base that supports the upper part of the damper of the suspension is arranged inside the upper member in the vehicle width direction.
The vehicle body front structure according to claim 1, wherein the damper base is coupled to the upper member and the lower surface of the dash upper panel. The vehicle body front structure according to claim 7, wherein the rear portion of the upper member lid member is mechanically coupled to the outer surface of the front pillar in the vehicle width direction. The dash upper panel is formed in a hat-shaped cross-sectional shape in which the cross section intersecting the vehicle width direction opens upward, and the rear edge portion includes a cowl top panel and a dash lower panel that support the lower end of the front wind seal glass. The vehicle body front structure according to claim 4, wherein the structure is coupled to the vehicle body. An upper member having an upper member main body having a substantially U-shaped cross section that opens outward in the vehicle width direction, and an upper member lid member coupled to the upper member main body so as to close the opening of the upper member main body.
A cowl side panel whose lower edge is connected to the inner side wall in the vehicle width direction of the upper member body,
A dash upper panel whose outer end in the vehicle width direction is coupled to the inner side wall in the vehicle width direction of the upper member main body is provided.
The upper member body is
An upper member base part having a notch in which a part of the upper wall and the inner side wall in the vehicle width direction is continuously cut out,
In a method for manufacturing a front part of a vehicle body provided with an upper split piece coupled to the upper member base portion so as to substantially close the notch portion.
A step of joining the lower edge portion of the cowl side panel and the split side wall of the upper split piece to form an upper structure.
A step of joining the bent flange at the end of the dash upper panel and the side wall of the base portion of the upper member base portion to form a base portion structure.
A step of joining the lower edge portion of the cowl side panel of the superstructure and the edge portion of the notch portion of the side wall of the base portion of the base portion structure to form a skeletal structure.
A step of joining each flange portion extending outward in the vehicle width direction from the upper and lower ends of the upper member lid member to the split piece upper wall of the upper split piece of the skeleton structure and the base portion lower wall of the upper member base portion. ,
A method of manufacturing the front part of the vehicle body, which comprises.

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