CN114590325A - Vehicle body front structure and method for manufacturing vehicle body front - Google Patents
Vehicle body front structure and method for manufacturing vehicle body front Download PDFInfo
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- CN114590325A CN114590325A CN202111228298.8A CN202111228298A CN114590325A CN 114590325 A CN114590325 A CN 114590325A CN 202111228298 A CN202111228298 A CN 202111228298A CN 114590325 A CN114590325 A CN 114590325A
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- base
- panel
- side wall
- upper beam
- wall
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000005304 joining Methods 0.000 claims abstract description 74
- 238000003466 welding Methods 0.000 claims abstract description 36
- 230000002787 reinforcement Effects 0.000 claims description 28
- 239000000725 suspension Substances 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 238000005192 partition Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/088—Details of structures as upper supports for springs or dampers
Abstract
Provided are a vehicle body front structure and a method for manufacturing a vehicle body front, which can efficiently join an instrument panel upper panel and a cowl side panel to an upper member without providing an unnecessary work hole for welding. The lower edge of the dash side panel (16) and the side wall of the upper divided sheet (20) are joined by a first joining section (W1) to form an upper structure. The bent flange of the dashboard upper panel (13) and the side wall of the upper beam base (19) are joined by a second joint (W2) to form a base structure. In the upper structure and the base structure, the lower edge of the dash side panel and the edge of the cutout (18) of the base side wall (19s) are joined by a third joining section (W3) to form a skeleton structure. In the framework structure and the upper beam cover member (12), the upper and lower flange portions of the upper beam cover member (12) are joined to the upper wall of the upper divided piece (20) and the lower wall of the upper beam base (19) by a fourth joining portion (W4) and a fifth joining portion (W5).
Description
Technical Field
The present invention relates to a vehicle body front structure and a method of manufacturing a vehicle body front.
Background
As a vehicle body front structure of a vehicle, there is known a structure in which: an upper beam (upper member) having a substantially rectangular cross section extends forward of the vehicle from left and right front pillars (front pillars), and a dash upper panel (dash upper panel) extending in the vehicle width direction is connected to a root portion of the upper beam (see, for example, patent document 1).
In the vehicle body front structure described in patent document 1, an end portion of the dash upper panel on the vehicle width direction outer side penetrates a side wall of the upper member on the vehicle width direction inner side, and a bent flange provided at the end portion of the dash upper panel touches the side wall of the upper member on the vehicle width direction outer side, and is fixed to the side wall by welding. A work hole for inserting a welding gun is formed in a side wall of the upper member on the outer side in the vehicle width direction. The bent flange of the dashboard upper panel is welded to the vehicle-widthwise outer side wall of the upper member through the work hole. A cowl top panel (cowl top panel) that supports and connects a lower end of a front window seal glass (front window seal glass) is coupled to a rear portion of the dashboard top panel, and a cowl side panel (cowl side panel) is coupled to an outer side of the cowl top panel in the vehicle width direction. The lower edge portion of the cowl side panel is fixed to the vehicle width direction inner side wall of the upper member by welding or the like.
[ Prior art documents ]
[ patent document ]
[ patent document 1] Japanese patent No. 4547610 publication
Disclosure of Invention
[ problems to be solved by the invention ]
In the vehicle body front structure, the end portion of the dash upper panel on the outer side in the vehicle width direction is welded and fixed to the outer side wall across the cross section of the upper member, and therefore the end portion of the dash upper panel can be connected to the root portion of the upper member with high rigidity. However, in the case of the vehicle body front structure described above, in order to weld the end portion of the dash upper panel to the outer side wall of the upper member in the vehicle width direction, a work hole for welding must be formed in the side wall of the upper member, and there is a fear that the strength of the upper member is reduced by the work hole. Further, in the vehicle body front structure, since a welding work for joining the end portion of the dashboard upper panel and the side wall of the upper rail needs to be performed through the work hole, the efficiency of the joining work is low, and improvement in this point is desired.
Accordingly, the present invention is intended to provide a vehicle body front structure and a method of manufacturing a vehicle body front, which can efficiently join an instrument panel upper panel and a cowl side panel to an upper member together without providing an unnecessary work hole for welding.
[ means for solving problems ]
In order to solve the above problems, the vehicle body front structure of the present invention adopts the following configuration.
That is, the vehicle body front structure of the present invention includes: an upper member (e.g., the upper member 10 of the embodiment) having an upper member body (e.g., the upper member body 11 of the embodiment) with a substantially コ -shaped cross section, the upper member body being open outward in the vehicle width direction, and an upper member cover member (e.g., the upper member cover member 12 of the embodiment) being coupled to the upper member body so as to close the opening of the upper member body; a cowl side panel (for example, cowl side panel 16 according to the embodiment) having a lower edge portion (for example, lower edge portion 16e according to the embodiment) joined to a side wall on an inner side in a vehicle width direction of the upper rail body; and an instrument panel upper panel (for example, an instrument panel upper panel 13 according to the embodiment) having an end portion on the vehicle width direction outer side joined to a side wall on the vehicle width direction inner side of the upper beam body, the upper beam body including: an upper beam base portion (e.g., upper beam base portion 19 of the embodiment) having a notched portion (e.g., notched portion 18 of the embodiment) in which an upper wall and a part of a side wall on the vehicle width direction inner side are continuously notched; and an upper divided piece (for example, an upper divided piece 20 according to the embodiment) joined to the upper beam base portion so as to substantially close the notch portion, the cowl side panel and the upper divided piece being joined together at a first joining portion (for example, a first joining portion W1 according to the embodiment) at the lower edge portion of the cowl side panel and a divided piece side wall (for example, a divided piece side wall 20s according to the embodiment) of the upper divided piece to constitute an upper structural body (for example, an upper structural body 24 according to the embodiment), the dash panel and the upper beam base portion being joined together at a second joining portion (for example, a second joining portion W2) at a bent flange (for example, a bent flange 13f according to the embodiment) provided so as to be bent upward at an end portion of the dash panel upper panel and a base portion side wall (for example, a base side wall 19s according to the embodiment) of the upper beam base portion, a base structure (e.g., base structure 26 according to the embodiment) is configured, the lower edge portion of the dash side panel and the edge portion of the cutout portion of the base side wall are joined by a third joining portion (e.g., third joining portion W3 according to the embodiment) with respect to the upper structure and the base structure, and a skeleton structure (e.g., skeleton structure 27 according to the embodiment) is configured, and with respect to the skeleton structure and the roof member, the flange portions (e.g., flange portion 12fu and flange portion 12fl according to the embodiment) of the roof member extending outward in the vehicle width direction from the upper and lower end portions are joined to the upper segment upper wall (e.g., segment upper wall 20u according to the embodiment) and the base lower wall (e.g., base lower wall 19l according to the embodiment) of the upper segment piece and the roof member, respectively, via a fourth joining portion (e.g., fourth joining portion W4 according to the embodiment) and a fifth joining portion (e.g., fifth joining portion W5 according to the embodiment).
According to the above configuration, the upper structure is configured such that the lower edge portion of the cowl side panel is joined to the divided piece side wall of the upper divided piece at the first joining portion. Since the upper divided piece and the large-sized upper beam base portion of the upper beam body are separate members, the lower edge portion of the dash side panel can be easily joined by pinch spot welding at the first joining portion.
The base structure is configured by joining the bent flange at the end of the dashboard upper panel to the base side wall of the upper beam base at the second joint portion. The upper beam base is provided with a notch portion in which a part of the upper wall and a part of the side wall are continuously cut, so that the bent flange at the end of the instrument panel upper plate and the base side wall can be easily joined by pinch spot welding in the second welded portion.
The frame structure is configured by joining the lower edge portion of the dash side panel and the edge portion of the cutout portion of the base side wall at the third joining portion. The peripheral regions of the lower edge portion of the cowl side panel and the base side wall are not pocket structures, and therefore the lower edge portion of the cowl side panel and the base side wall can be easily joined by pinch spot welding in the third welded portion.
In the above-described frame structure and the upper beam cover member, the upper flange portion of the upper beam cover member is joined to the upper divided piece upper wall of the upper divided piece by the fourth joining portion, and the lower flange portion of the upper beam cover member is joined to the base lower wall of the upper beam base by the fifth joining portion. Since the peripheries of the fourth joining portion and the fifth joining portion are not formed into a bag structure, the upper beam cover member can be easily joined to the partition upper wall and the base lower wall by pinch spot welding in the fourth joining portion and the fifth joining portion.
The lower edge portion of the cowl side panel may be overlapped with the vehicle width direction inner side surface of the base side wall of the upper rail base portion and joined by the third joining portion, and a guide wall (for example, a guide wall 25 of the embodiment) inclined downward toward the vehicle width direction outer side may be provided below the third joining portion in the lower edge portion of the cowl side panel.
In this case, when the upper structure is assembled to the base structure from above, the edge of the cutout portion of the upper beam base abuts against the guide wall of the dash side panel, whereby the lower edge portion of the dash side panel can be guided to a position overlapping the vehicle width direction inner side surface of the base side wall. Therefore, in the case of this configuration, the upper structure can be efficiently assembled to the base structure.
The rear portion of the upper segment of the upper structure may be supported from below by the rear portion of the dash upper panel, and the front portion of the upper segment of the upper structure may be supported from below by a base upper wall of the upper beam base (e.g., a base upper wall 19u in the embodiment).
In this case, when the upper structure is assembled to the base structure from above, the front and rear of the upper divided piece are supported from below by the base upper wall and the rear portion of the instrument panel upper panel, and therefore the upper structure can be positioned to the upper beam base with high accuracy in the vertical direction. Therefore, in the case of this configuration, the assembly of the upper structure to the base structure can be performed more efficiently.
A drain opening (e.g., drain opening 22f or 22r in the embodiment) for discharging water droplets from the upper surface of the dashboard upper panel into the cross section of the upper rail may be provided between the divided piece side wall and the base side wall located therebelow, and the third joining portion may be provided in the vicinity of the drain opening.
In this case, the vicinity of the portion of the base side wall of the upper beam base portion where the strength is reduced by forming the drain opening can be reinforced by the third joint portion.
The following structure may be adopted: a reinforcement (for example, reinforcement 28 according to the embodiment) having a substantially L-shaped longitudinal cross section and joined to the vehicle exterior side surface of the base side wall of the upper beam base portion and the upper surface of the base lower wall is disposed below the notch portion of the upper beam base portion, and the reinforcement has a reinforcement joining portion (for example, reinforcement joining portion 30 according to the embodiment) in which a plurality of welding points (for example, welding points P according to the embodiment) with the base side wall are arranged in the vertical direction below the drain opening.
At this time, the lower portion of the base-portion side wall of the upper beam base portion where the drain opening is formed can be reinforced by the reinforcement joint portion of the reinforcement.
It is preferable that at least one of the plurality of welding points constituting the reinforcement joint is a joint portion joined to a damper base (for example, the damper base 17 of the embodiment) that supports an upper portion of a damper (damper) of a suspension (suspension).
In this case, the damper base, which is a strong component that is not easily deformed even when an impact load is applied, is joined to at least one welding point of the reinforcement joint portion, and therefore, the strength of the vicinity of the portion of the base side wall of the upper beam base portion where the drain opening is formed can be further increased.
The cowl side panel may be integrally coupled to an end portion of a cowl top panel (for example, the cowl top panel 15 according to the embodiment) that supports a lower end of the front window seal glass, the dash top panel may be formed in a box shape together with the cowl top panel and the cowl side panel, a damper base (for example, the damper base 17 according to the embodiment) that supports an upper portion of a damper of the suspension may be disposed on an inner side of the upper beam in the vehicle width direction, and the damper base may be coupled to lower surfaces of the upper beam and the dash top panel.
In this case, the damper base is coupled to the lower surface of the dashboard upper panel and the closed cross-sectional shape upper beam that form a box shape together with the cowl upper panel and the cowl side panel. Therefore, the upper portion of the suspension can be supported by the vehicle body with high rigidity via the damper base.
The rear portion of the roof rail cover member may be mechanically coupled to the vehicle width direction outer side surface of the front pillar (for example, the front pillar 3 in the embodiment).
In this case, the rear portion of the upper beam is supported by the front pillar with high rigidity, and therefore the support rigidity of the upper portion of the suspension passing through the damper base can be further increased.
The dash upper panel may have a hat-shaped cross-sectional shape in which a cross section intersecting the vehicle width direction is open upward, and a rear edge portion thereof may be bonded to a front-edge upper panel (e.g., the front-edge upper panel 15 according to the embodiment) and an dash lower panel (e.g., the dash lower panel 14 according to the embodiment) that support a lower end of the front window seal glass.
In this case, since the dash upper panel has a hat-shaped cross section that opens upward, the rigidity of the dash upper panel can be increased, and the drainage of water droplets that have flowed into the cross section of the dash upper panel can be increased.
In order to solve the above problem, the method of manufacturing the vehicle body front portion of the present invention adopts the following configuration.
A method of manufacturing a vehicle body front portion, the vehicle body front portion comprising: an upper member (e.g., the upper member 10 of the embodiment) having an upper member body (e.g., the upper member body 11 of the embodiment) with a substantially コ -shaped cross section, the upper member body being open outward in the vehicle width direction, and an upper member cover member (e.g., the upper member cover member 12 of the embodiment) being coupled to the upper member body so as to close the opening of the upper member body; a cowl side panel (for example, cowl side panel 16 according to the embodiment) having a lower edge portion (for example, lower edge portion 16e according to the embodiment) joined to a side wall on an inner side in a vehicle width direction of the upper rail body; and an instrument panel upper panel (for example, an instrument panel upper panel 13 according to the embodiment) having an end portion on an outer side in the vehicle width direction thereof joined to a side wall on an inner side in the vehicle width direction of the upper beam body, the upper beam body including: an upper beam base portion (e.g., upper beam base portion 19 of the embodiment) having a notched portion (e.g., notched portion 18 of the embodiment) in which an upper wall and a part of a side wall on the vehicle width direction inner side are continuously notched; and an upper divided piece (for example, an upper divided piece 20 according to an embodiment) joined to the upper beam base portion so as to substantially close the notch portion, and the method for manufacturing the vehicle body front portion includes: forming an upper structure (for example, an upper structure 24 according to the embodiment) by joining the lower edge portion of the cowl side panel and a divided piece side wall (for example, a divided piece side wall 20s according to the embodiment) of the upper divided piece; joining a bent flange (for example, a bent flange 13f according to the embodiment) at an end portion of the dash upper panel to a base side wall (for example, a base side wall 19s according to the embodiment) of the upper beam base to form a base structure (for example, a base structure 26 according to the embodiment); joining the lower edge portion of the cowl side panel of the upper structure to an edge portion of the notched portion of the base side wall of the base structure to form a skeleton structure; and joining the respective flange portions (e.g., the flange portion 12fu and the flange portion 12fl of the embodiment) of the upper lid member extending outward in the vehicle width direction from the respective upper and lower end portions to the divided upper wall (e.g., the divided upper wall 20u of the embodiment) of the upper divided piece of the skeletal structure and the base lower wall (e.g., the base lower wall 19l of the embodiment) of the upper beam base.
[ Effect of the invention ]
With the vehicle body front structure of the present invention, the vehicle body front can be manufactured by the following method.
First, the lower edge portion of the dash side panel and the divided piece side wall of the upper divided piece are joined at the first joining portion to form the upper structural body, the bent flange of the dash panel upper panel and the base side wall of the upper beam base are joined at the second joining portion to form the base structural body, and the lower edge portion of the dash side panel and the edge portion of the cutout portion of the base side wall are joined at the third joining portion to form the skeleton structural body. Then, the upper flange portion of the upper beam cover member is joined to the upper divided piece upper wall of the upper divided piece by the fourth joining portion, and the lower flange portion of the upper beam cover member is joined to the base lower wall of the upper beam base portion by the fifth joining portion.
Therefore, in the case of the vehicle body front structure according to the present invention, the dash upper panel and the cowl side panel can be efficiently joined to the upper member without providing an unnecessary work hole for welding.
Drawings
Fig. 1 is a perspective view of a skeleton portion of a front portion of a vehicle according to an embodiment.
Fig. 2 is a perspective view of a skeleton portion of a front portion of a vehicle according to an embodiment with parts removed.
Fig. 3 is a side view of a skeleton portion of a front portion of a vehicle according to an embodiment with parts removed.
Fig. 4 is a perspective view of a skeleton portion of a front portion of a vehicle of the embodiment.
Fig. 5 is a sectional view taken along line V-V of fig. 1.
Fig. 6 is a sectional view taken along line VI-VI of fig. 2.
Fig. 7 is a partial sectional perspective view of the skeleton portion of the front portion of the vehicle according to the embodiment, taken along line VII-VII of fig. 2.
Fig. 8 is a sectional view corresponding to fig. 5, showing an assembly process of the vehicle body front portion of the embodiment.
Fig. 9 is a sectional view corresponding to fig. 5, showing an assembly process of the vehicle body front portion of the embodiment.
[ description of symbols ]
3: front pillar
10: upper beam
11: upper beam body
12: upper beam cover component
12fu, 12 fl: flange part
13: instrument board upper plate
13 f: bent flange
15: front wall upper plate
16: front wall side plate
16 e: lower edge part
17: shock absorber base
18: notch part
19: upper beam base
19 s: base side wall
19 u: upper wall of base
19 l: base lower wall
20: upper dividing sheet
20 s: side wall of partition sheet
20 u: partition upper wall
22f, 22 r: water outlet
24: upper structure
25: guide wall
26: base structure
27: skeleton structure
28: reinforcing element
30: reinforced joint
P: joint point
W1: first joint part
W2: second joint part
W3: third joint part
W4: fourth joint part
W5: fifth joint part
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, in appropriate portions of the drawings, an arrow FR indicating the front of the vehicle 1, an arrow UP indicating the upper side of the vehicle 1, and an arrow LH indicating the left side of the vehicle 1 are denoted. The skeleton portions of the vehicle body front portion of the vehicle 1 are formed substantially symmetrically left and right. Therefore, the structure on the left side of the vehicle will be described below, and the description of the structure on the right side will be omitted.
Fig. 1 is a perspective view of a vehicle body front portion of a vehicle 1 of the embodiment as viewed from above a left front portion of the vehicle 1.
In the vehicle 1, a side member 2 is disposed below a side portion of a passenger compartment, and the side member 2 is a frame member extending in a vehicle body front-rear direction. A front pillar 3 is disposed in front of a side portion of the passenger compartment, and the front pillar 3 is a framework member that rises vertically upward from a front end portion of the side member 2. A front side frame 4 is coupled to a front end portion of the side member 2 via a coupling frame, not shown, extending inward in the vehicle width direction. The front side frame 4 extends toward the vehicle front side at a position offset inward in the vehicle width direction with respect to the side member 2, and mainly supports a drive unit including an engine (engine), a motor (motor), and the like.
An upper member 10 that extends forward of the vehicle while gradually curving downward from the front pillar 3 is connected to an upper region of the front pillar 3. The upper member 10 is a framework member extending toward the vehicle front side on the vehicle width direction outer side than the front side frame 4. The front end of the upper member 10 is set to be substantially the same height as the front end of the front side frame 4. The front end of the upper member 10 is connected to the front end of the front side frame 4 inside the upper member by a gusset 5.
The upper beam 10 includes: an upper beam body 11 having a substantially コ -shaped cross section and opening outward in the vehicle width direction; and an upper beam cover member 12 coupled to the upper beam body 11 so as to close the opening of the upper beam body 11. The upper member 10 has a vertically long substantially rectangular cross-sectional shape having a dimension in the vertical direction longer than a dimension in the horizontal direction.
An end portion of an instrument panel upper 13 extending in the vehicle width direction is connected to a base portion (an end portion closer to the passenger compartment) of the upper member 10. The dash upper panel 13 is formed in a hat-shaped cross-sectional shape having an upwardly open cross section intersecting the vehicle width direction. The rear edge portion of the dash upper panel 13 is joined to an upper end portion of the dash lower panel 14 that partitions the passenger compartment and the engine compartment. A cowl top 15 for supporting a lower end of a front window seal glass, not shown, is coupled to a rear edge portion of the dash panel top 13. The cowl top 15 extends in the vehicle width direction above the dash panel top 13. The center region of the front wall upper panel 15 in the vehicle width direction is joined to the front 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 shape in side view is connected to an outer end portion of the cowl top panel 15 in the vehicle width direction. The lower edge portion of the dash side panel 16 is connected to the inner side wall of the upper member 10 on the base side in the vehicle width direction.
Further, a damper base 17 that supports the upper portion of a damper, not shown, of the front suspension is coupled to a portion of the vehicle-widthwise inner side wall on the root side of the upper member 10, which is lower than the portion coupled to the dash panel upper 13. The upper surface of the damper base 17 is connected to the lower surface of the vehicle-widthwise outer region of the dash panel upper 13. The damper base 17 is formed of a thick-walled metal plate.
Fig. 2 is a perspective view of the front portion of the vehicle body viewed from above the front left portion of the vehicle 1 with the upper rail cover member 12 removed from the upper rail 10. Fig. 3 is a side view of the front part of the vehicle body viewed from the left side of the vehicle 1, with the upper rail cover member 12 removed from the upper rail 10. 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 compartment side.
As shown in these figures, the upper beam body 11 includes: an upper beam base 19 in which an upper wall on a root side and a part of a side wall on an inner side in a vehicle width direction are cut continuously; and an upper divided piece 20 joined to the upper beam base 19 so as to substantially close the notch 18 of the upper beam base 19.
Hereinafter, the side wall of the upper beam base 19 standing in the vertical direction is referred to as a base side wall 19s, the upper wall extending outward in the vehicle width direction from the upper end portion of the base side wall 19s is referred to as a base upper wall 19u, and the lower wall extending outward in the vehicle width direction from the lower end portion of the base side wall 19s is referred to as a base lower wall 19 l. The side wall of the upper segment 20 standing in the vertical direction is referred to as a segment side wall 20s, and the upper wall extending outward in the vehicle width direction from the upper end of the segment side wall 20s is referred to as a segment upper wall 20 u.
As shown in fig. 3, the notch 18 of the upper beam base 19 has a shape obtained by cutting a part of the base upper wall 19u over the entire width of the vehicle and cutting a part of the base side wall 19s from the upper end by a predetermined height. However, the lower end of the notch portion 18 of the base side wall 19s does not extend linearly in the vehicle body longitudinal direction over the entire area, but a recessed portion 21f and a recessed portion 21r recessed downward in a concave shape are formed in the front and rear of the linear portion in the central region. The front and rear recessed portions 21f, 21r of the notch 18 form a drain opening 22f, 22r between the upper divided piece 20 and the lower end of the divided piece side wall 20s of the upper divided piece 20 when the upper divided piece 20 is attached to the upper beam base 19. The drain ports 22f and 22r are holes for discharging water droplets flowing into the upper surface of the dash panel upper 13 into the cross section of the upper beam 10, and end portions of front and rear groove portions 23f and 23r of the dash panel upper 13, which will be described later, are inserted.
Fig. 5 is a sectional view taken along line V-V of fig. 1, and fig. 6 is a sectional view taken along line VI-VI of fig. 2. Fig. 7 is a partially sectional perspective view of the front portion of the vehicle body taken along line VII-VII in fig. 2.
The lower edge portion 16e of the dash side panel 16 is overlapped on the vehicle width direction inner side surface of the divided piece side wall 20s of the upper divided piece 20, and is joined to the divided piece side wall 20s by spot welding in this state. This joint portion (see fig. 5) is referred to as a first joint portion W1. The dash side panel 16 and the upper divided panel 20 thus joined by the first joining portion W1 constitute the upper structure 24 of the present embodiment (see fig. 8).
Further, a guide wall 25 inclined downward outward in the vehicle width direction is provided below the first joining portion W1 (below a third joining portion W3 described later) in the lower edge portion 16e of the dash side panel 16.
The pair of groove portions 23f, 21r described above are formed in the vehicle width direction outer region of the dash panel upper 13. One of the groove portions 23f is formed on the front side of the dash panel upper 13, and the other groove portion 21r is formed on the rear side of the dash panel upper 13. Each of the pair of groove portions 23f is recessed downward in a concave shape, and the vehicle-width-direction outer end portions protrude into the drain port 22f and the drain port 22 r. A bent flange 13f bent upward in a substantially L-shape is provided at a portion sandwiched between the front and rear groove portions 23f, 21r at the vehicle width direction outer end portion of the dash upper panel 13.
The bent flange 13f is joined to the base side wall 19s of the upper rail base 19 by spot welding in a state where it touches the inner surface of the base side wall 19s in the vehicle width direction. This joint is referred to as a second joint W2. The dash upper panel 13 and the upper beam base 19 joined by the second joint portion W2 in this manner constitute the base structure 26 of the present embodiment (see fig. 8).
In the upper structure 24, the lower edge portion 16e of the dash side panel 16 is overlapped on the inner surface in the vehicle width direction of the edge portion of the notched portion 18 of the base side wall 19s of the base structure 26, and in this state, is joined to the base side wall 19s by spot welding. This joint is referred to as a third joint W3. The upper structure 24 and the base structure 26 joined by the third joining portion W3 in this manner constitute the skeletal structure 27 of the present embodiment (see fig. 9).
The position of the third joining portion W3 on the base side wall 19s is set in the region between the front and rear recessed portions 21f, 21r ( drain openings 22f, 22r) in the edge portion of the notch portion 18. Therefore, the third joint portion W3 is provided in the vicinity of the drain openings 22f and 22 r.
When the upper structure 24 is joined to the base structure 26 at the third joining portion W3, the upper structure 24 is lowered from above the base structure 26, and the lower edge portion 16e of the dash side panel 16 of the upper structure 24 is overlapped on the vehicle exterior side surface of the base side wall 19s of the base structure 26. At this time, since the inclined guide wall 25 is provided at the lower edge portion 16e of the dash side panel 16, the lower edge portion 16e of the dash side panel 16 and the base side wall 19s can be easily overlapped at a regular position by the guide function of the guide wall 25.
In the upper divided piece 20 of the upper structure 24, the front edge portion 20uf and the rear edge portion 20ur of the divided piece upper wall 20u are overlapped on the upper surfaces of the respective edge portions 19uf, 19ur on the front side and the rear side of the notch portion 18 in the base upper wall 19 u. In the present embodiment, the edge 19ur on the rear side of the cutout portion 18 in the base portion upper wall 19u and the other portion of the upper beam base portion 19 are formed by separate members. The rear edge 19ur is also joined to the rear of the front pillar 3 and the dash panel upper 13. Therefore, the rear portion of the upper divided piece 20 is supported from below by the rear portion of the dash upper panel 13, and the front portion of the upper divided piece 20 is supported from below by the front edge portion 19uf of the base upper wall 19u of the upper beam base 19.
The upper lid member 12 has a side wall 12s standing vertically upward, and flange portions 12fu and 12fl extending outward in the vehicle width direction from upper and lower end portions of the side wall 12 s. The upper beam cover member 12 is assembled to the frame structure 27. The upper beam cover member 12 is disposed between the upper wall and the lower wall of the upper beam body 11 of the skeletal structure 27. Specifically, the upper member base 19 is disposed between the base upper wall 19u and the base lower wall 19l of the upper member base 19 in the region where the notch 18 is not present, and the upper member segment 20 is disposed between the segment upper wall 20u and the base lower wall 19l of the upper member base 19 in the region where the notch 18 is present.
In the frame structure 27 and the upper beam cover member 12, the upper flange portion 12fu of the upper beam cover member 12 is joined to the base upper wall 19u and the divided piece upper wall 20u by spot welding, and the lower flange portion 12fl of the upper beam cover member 12 is joined to the base lower wall 19l by spot welding. The joint between the upper flange portion 12fu of the upper lid member 12 and the divided piece upper wall 20u is referred to as a fourth joint W4, and the joint between the lower flange portion 12fl of the upper lid member 12 and the base lower wall 19l is referred to as a fifth joint W5.
As shown in fig. 1, the rear edge portion 12sr of the side wall 12s of the upper rail cover member 12 is provided on the vehicle rear side with respect to the rear end portion of the upper rail body 11. The rear edge portion 12sr of the upper rail cover member 12 is overlapped on the vehicle width direction outer side surface of the front pillar 3, and is fastened and fixed to the front pillar 3 by a plurality of bolts 32. That is, the rear portion of the upper rail cover member 12 is mechanically coupled to the vehicle width direction outer side surface of the front pillar 3.
Further, as shown in fig. 2, 3, 7, and 8, a reinforcement 28 having a substantially L-shaped longitudinal cross section and joined to the vehicle exterior side surface of the base side wall 19s and the upper surface of the base lower wall 19L is disposed below the notch 18 in the upper beam base 19. The reinforcement 28 extends in the vehicle longitudinal direction around the position below the recessed portion 21f (the front drain opening 22f) on the front side of the cutout 18. The side wall 28s and the lower wall 28l of the reinforcement 28 are joined to the base side wall 19s and the base lower wall 19l at a plurality of points by spot welding.
A tongue portion 29 extending upward is provided substantially at the center in the front-rear direction of the side wall 28s of the reinforcement 28. The front edge portion of the tongue piece portion 29 and the lower portion of the side wall 28s are reinforcement joining portions 30 in which a plurality of (three in the present embodiment) welding points P with the base side wall 19s are arranged in the vertical direction. The plurality of welding points P of the reinforcement joint portion 30 are disposed at positions below the drain port 22f on the front side.
As shown in fig. 6 and 7, the damper base 17 described above is provided with a joining flange 17f bent downward at the vehicle width direction outer end portion. The joining flange 17f is overlapped with the overlapping portion of the reinforcement 28 and the base side wall 19s from the vehicle width direction inner side of the base side wall 19s, and is welded and fixed to the base side wall 19s and the reinforcement 28 at the uppermost welding point P in a state of overlapping three pieces.
In the present embodiment, the damper base 17, the upper beam base 19, and the reinforcement 28 are joined at only the uppermost welding point P, but may be welded at other welding points P.
(method of manufacturing front part of vehicle body)
Next, a main manufacturing method of the main portion of the vehicle body front portion will be described with reference to fig. 8 and 9. Fig. 8 and 9 are sectional views corresponding to fig. 5, showing an assembly process of the vehicle body front portion.
First, as shown in the upper side of fig. 8, the lower edge portion 16e of the dash side panel 16 is brought into contact with the vehicle width direction inner side surface of the divided piece side wall 20s of the upper divided piece 20, and in this state, the lower edge portion 16e of the dash side panel 16 is spot-welded to the divided piece side wall 20s at the first joint portion W1. Thereby forming the upper structure 24.
On the other hand, as shown in the lower side of fig. 8, the bent flange 13f of the end portion of the dash upper panel 13 is brought into contact with the vehicle width direction inner side surface of the base side wall 19s of the upper rail base 19, and in this state, the bent flange 13f of the dash upper panel 13 is spot-welded to the base side wall 19s at the second joint portion W2. Thereby forming the base structure 26.
Then, the lower edge portion 16e of the dash side panel 16 of the upper structure 24 is superimposed on the vehicle width direction outer side surface of the base side wall 19s at the position where the notch portion 18 is present (see the arrow in fig. 8). In this state, as shown in fig. 9, the lower edge portion 16e of the dash side panel 16 is spot-welded to the base side wall 19s at the third joint portion W3. Thereby forming a skeletal structure 27.
Then, the upper lid member 12 is inserted into the outward opening formed by the upper base portion 19 and the upper divided piece 20 of the skeletal structure 27, as indicated by the arrow in fig. 9, and the upper and lower flange portions 12fu, 12fl of the upper lid member 12 are superposed on the upper divided wall 20u and the base lower wall 19 l. Further, at a position where the cutout portion 18 is not provided in the upper beam base portion 19, the upper flange portion 12fu of the upper beam cover member 12 is overlapped on the base portion upper wall 19 u. Next, in this state, each overlapped portion is spot-welded. The upper flange portion 12fu of the upper beam cover member 12 is spot-welded to the upper partition wall 20u of the upper partition 20 at the fourth joint portion W4, and the lower flange portion 12fl of the upper beam cover member 12 is spot-welded to the base lower wall 19l of the upper beam base 19 at the fifth joint portion W5.
(effects of the embodiment)
As described above, in the present embodiment, the upper structure 24 is configured such that the lower edge portion 16e of the dash side panel 16 and the divided piece side wall 20s of the upper divided piece 20 are joined by the first joining portion W1. The upper divided piece 20 is a separate member from the upper beam base 19, and thus can be easily joined to the dash side panel 16 by pinch spot welding in the first joining portion W1.
The base structure 26 is configured such that the bent flange 13f of the dash upper panel 13 and the base side wall 19s of the upper beam base 19 are joined by the second joining portion W2. Further, the upper beam base 19 is provided with a notch 18 in which a part of the upper wall and a part of the side wall are cut continuously. Therefore, the bent flange 13f of the dash upper panel 13 and the base side wall 19s can be easily joined by pinch spot welding at the second joining portion W2 by the notched portion 18.
The frame structure 27 is configured by joining the lower edge portion 16e of the dash side panel 16 and the edge portion of the cutout portion 18 of the base side wall 19s at a third joining portion W3. The peripheral regions of the lower edge portion 16e of the dash side panel 16 and the base side wall 19s are not of a bag structure, and therefore the lower edge portion 16e of the dash side panel 16 and the base side wall 19s can be easily joined by pinch spot welding at the third joined portion W3.
Further, with respect to the skeletal structure 27 and the upper lid member 12, the upper flange portion 14fu of the upper lid member 12 is joined to the divided piece upper wall 20u by the fourth joining portion W4, and the lower flange portion 14fl of the upper lid member 12 is joined to the base lower wall 19l by the fifth joining portion W5. Since the peripheries of the fourth joining portion W4 and the fifth joining portion W5 are not formed into pockets, the upper lid member 12 can be easily joined to the upper partition wall 20u and the lower base wall 19l at the fourth joining portion W4 and the fifth joining portion W5 by pinch spot welding.
Therefore, in the case of adopting the vehicle body front structure of the present embodiment, the dash upper panel 13 can be efficiently joined to the upper member 10 together with the dash side panel 16 without providing an unnecessary work hole for welding.
In the vehicle body front structure of the present embodiment, the guide wall 25 inclined downward outward in the vehicle width direction is provided below the third joining portion W3 in the lower edge portion of the dash side panel 16. Therefore, when the upper structure 24 is assembled to the base structure 26 from above, the lower edge portion 16e of the cowl side panel 16 can be guided to a position overlapping the vehicle width direction inner side surface of the base side wall 19s by the edge portion of the notched portion 18 of the cowl side panel 19 coming into contact with the guide wall 25 of the cowl side panel 16. Therefore, when the vehicle body front structure of the present embodiment is employed, the assembly of the upper structure 24 to the base structure 26 can be efficiently performed.
In the vehicle body front structure of the present embodiment, the rear edge portion 20ur of the upper divided piece 20 of the upper structure 24 is supported from below by the rear portion of the dash upper panel 13, and the front edge portion 20uf of the upper divided piece 20 of the upper structure 24 is supported from below by the base upper wall 19u of the upper beam base 19. Therefore, when the upper structure 24 is assembled to the base structure 26 from above, the front and rear of the upper divided piece 20 are supported from below by the base upper wall 19u and the rear portion of the dash upper panel 13. Therefore, in the case of this configuration, the upper structure 24 can be positioned with high accuracy in the vertical direction with respect to the upper beam base 19, and therefore, the assembly of the upper structure 24 to the base structure 26 can be performed more efficiently.
In the vehicle body front structure of the present embodiment, a third joining portion W3 that joins the base side wall 19s to the dash side panel 16 is provided in the vicinity of the drain opening 22f of the base side wall 19s (the recessed portion 21f of the cutout portion 18). Therefore, the vicinity of the portion of the base-side wall 19s where the strength is reduced by forming the drain opening 22f (the recessed portion 21f of the notch portion 18) can be reinforced efficiently by the third joining portion W3.
Further, in the vehicle body front structure of the present embodiment, the reinforcement 28 having a substantially L-shaped cross section is disposed below the notch portion 18 of the upper rail base portion 19, and the reinforcement joint portion 30 of the reinforcement 28 is joined to the base side wall 19s by a plurality of vertically aligned welding points P below the drain opening 22 f. Therefore, the portion of the base-side wall 19s below the portion where the drain opening 22f (the recessed portion 21f of the notch portion 18) is formed can be reinforced by the reinforcing joint portion 30 of the reinforcement 28.
In the vehicle body front structure according to the present embodiment, at least one welding point P of the reinforcement joint portion 30 is a joint portion to which the damper base 17 is joined. Therefore, the strength in the vicinity of the portion of the base-side wall 19s where the drain opening 22f (the recessed portion 21f of the notch portion 18) is formed can be further improved. That is, since the damper base 17 is a thick and firm part that is not easily deformed even when an impact load is applied, the strength in the vicinity of the drain opening 22f can be further improved by the rigidity of the damper base 17.
In the vehicle body front portion structure of the present embodiment, the dash side panel 16 is integrally joined to the vehicle width direction outer side end portion of the front cowl top panel 15, and the dash panel top panel 13 forms a box shape together with the front cowl top panel 15 and the dash side panel 16. Further, a damper base 17 that supports an upper portion of a damper of the suspension is joined to lower surfaces of the upper beam 10 and the dash upper panel 13 at a position on an inner side in the vehicle width direction of the upper beam 10. Therefore, in the case of this configuration, the damper base 17 is coupled to the lower surface of the instrument panel upper plate 13 formed in the box shape and the upper beam 10 formed in the closed cross-sectional shape, whereby the upper portion of the suspension can be supported by the vehicle body with high rigidity via the damper base 17.
In the vehicle body front structure according to the present embodiment, the rear edge portion 12sr of the upper rail cover member 12 is mechanically coupled to the vehicle width direction outer side surface of the front pillar 3. Therefore, the support rigidity of the upper portion of the suspension passing through the damper base 17 can be further improved.
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 having an upward opening in a cross section intersecting the vehicle width direction, and the rear edge portion thereof is joined to the cowl upper panel 15 and the dash lower panel 14. Therefore, the rigidity of the dash upper panel 13 can be improved, and the drainage of 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-described embodiments, and various design changes can be made without departing from the scope of the invention.
Claims (10)
1. A vehicle body front structure characterized by comprising:
an upper beam having an upper beam body with a cross-section of コ -shaped, the upper beam body opening outward in the vehicle width direction, and an upper beam cover member coupled to the upper beam body so as to close the opening of the upper beam body;
a cowl side panel having a lower edge portion coupled to a side wall of the upper beam body on an inner side in a vehicle width direction; and
an instrument panel upper panel having a vehicle-widthwise outer end portion joined to a vehicle-widthwise inner side wall of the upper beam body,
the upper beam body includes:
an upper beam base having a notch portion where an upper wall and a part of a side wall on the inner side in the vehicle width direction are continuously cut; and
an upper divided piece coupled to the upper beam base portion so as to close the notch portion,
the cowl side panel and the upper divided piece are joined together at a first joint portion between the lower edge portion of the cowl side panel and a divided piece side wall of the upper divided piece to form an upper structure,
a base structure is configured by joining a bent flange provided at an end portion of the dash upper panel so as to be bent upward to a base side wall of the upper beam base by a second joining portion,
in the upper structure and the base structure, the lower edge portion of the cowl side panel and the edge portion of the cutout portion of the base side wall are joined by a third joining portion to constitute a skeleton structure,
in the above-described frame structure and the upper roof rail cover member, the respective flange portions of the upper roof rail cover member extending outward in the vehicle width direction from the respective upper and lower end portions are joined to the upper divided piece upper wall and the upper roof rail base lower wall, respectively, by a fourth joining portion and a fifth joining portion.
2. The vehicle body front structure according to claim 1,
the lower edge portion of the cowl side panel is overlapped with the vehicle width direction inner side surface of the base side wall of the upper rail base portion and is joined by the third joining portion,
a guide wall inclined downward outward in the vehicle width direction is provided below the third joint portion in the lower edge portion of the dash side panel.
3. The vehicle body front structure according to claim 2,
a rear portion of the upper divided piece of the upper structural body is supported from below by a rear portion of the instrument panel upper panel,
the front portion of the upper divided piece of the upper structure is supported from below by a base upper wall of the upper beam base.
4. The vehicle body front structure according to claim 1,
a drain opening for discharging water droplets from the upper surface of the instrument panel upper plate into the cross section of the upper beam is provided between the divided piece side wall and the base side wall located therebelow, and the third joint portion is provided in the vicinity of the drain opening.
5. The vehicle body front structure according to claim 4,
a reinforcement member that is L-shaped in longitudinal cross section and joined to the vehicle exterior side surface of the base side wall of the upper beam base portion and the upper surface of the base lower wall is disposed below the notch portion of the upper beam base portion,
the reinforcement has a reinforcement joint portion below the drain opening, and a plurality of welding points with the base side wall are arranged in the vertical direction at the reinforcement joint portion.
6. The vehicle body front structure according to claim 5,
at least one of the plurality of welding points constituting the reinforcement joint portion is a joint portion joined to a damper base that supports an upper portion of a damper of a suspension.
7. The vehicle body front structure according to claim 1,
the cowl side panel is integrally coupled to an outer end portion of the cowl top panel supporting a lower end of the front window seal glass in the vehicle width direction,
the dash upper panel forms a box shape together with the cowl upper panel and the cowl side panel,
a damper base disposed on an upper portion of a damper for supporting a suspension on an inner side of the upper member in the vehicle width direction,
the shock absorber base is combined to the upper beam and the lower surface of the instrument panel upper plate.
8. The vehicle body front structure according to claim 7,
the rear portion of the upper beam cover member is mechanically coupled to the vehicle width direction outer side surface of the front pillar.
9. The vehicle body front structure according to claim 4,
the dash upper panel is formed in a hat-shaped cross section that intersects the vehicle width direction and has an upwardly open cross section, and the rear edge portion is joined to a front upper panel and a dash lower panel that support the lower end of the front window seal glass.
10. A method of manufacturing a vehicle body front portion, the vehicle body front portion comprising:
an upper beam having an upper beam body with a cross-section of コ -shaped, the upper beam body opening outward in the vehicle width direction, and an upper beam cover member coupled to the upper beam body so as to close the opening of the upper beam body;
a cowl side panel having a lower edge portion coupled to a side wall of the upper beam body on an inner side in a vehicle width direction; and
an instrument panel upper panel having a vehicle-widthwise outer end portion joined to a vehicle-widthwise inner side wall of the upper beam body,
the upper beam body includes:
an upper beam base having a notch portion where an upper wall and a part of a side wall on the inner side in the vehicle width direction are continuously cut; and
and an upper section piece that is joined to the upper rail base portion so as to close the notch portion, wherein the method for manufacturing the vehicle body front portion includes:
joining the lower edge portion of the cowl side panel to a divided panel side wall of the upper divided panel to form an upper structure;
joining a bent flange at an end of the dashboard upper panel to a base side wall of the upper beam base to form a base structure;
joining the lower edge portion of the cowl side panel of the upper structure to an edge portion of the notched portion of the base side wall of the base structure to form a skeleton structure; and
the respective flange portions of the upper member cover member extending outward in the vehicle width direction from the respective upper and lower end portions are joined to the upper divided piece upper wall and the upper member base lower wall of the skeletal structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020201908A JP7125971B2 (en) | 2020-12-04 | 2020-12-04 | VEHICLE FRONT STRUCTURE AND VEHICLE FRONT MANUFACTURING METHOD |
| JP2020-201908 | 2020-12-04 |
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| Publication Number | Publication Date |
|---|---|
| CN114590325A true CN114590325A (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111228298.8A Pending CN114590325A (en) | 2020-12-04 | 2021-10-21 | Vehicle body front structure and method for manufacturing vehicle body front |
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| Country | Link |
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| JP (1) | JP7125971B2 (en) |
| CN (1) | CN114590325A (en) |
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| DE102012020117A1 (en) * | 2011-10-12 | 2013-04-18 | Suzuki Motor Corporation | Transverse wall structure for longitudinal beam in vehicle, has cross wall including plate parts with flanges, where each plate part is connected with inner side of rear longitudinal beam |
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| JP2013248898A (en) * | 2012-05-30 | 2013-12-12 | Honda Motor Co Ltd | Vehicle body front structure |
| US9604675B2 (en) * | 2013-09-04 | 2017-03-28 | Honda Motor Co., Ltd. | Vehicle body front portion structure, and vehicle body assembly method |
| JP6265342B2 (en) * | 2015-09-29 | 2018-01-24 | 本田技研工業株式会社 | Body front structure |
| JP6215979B2 (en) * | 2016-02-01 | 2017-10-18 | 本田技研工業株式会社 | Auto body structure |
| JP6479087B2 (en) * | 2017-04-25 | 2019-03-06 | 本田技研工業株式会社 | Body front structure |
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2020
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| DE102012020117A1 (en) * | 2011-10-12 | 2013-04-18 | Suzuki Motor Corporation | Transverse wall structure for longitudinal beam in vehicle, has cross wall including plate parts with flanges, where each plate part is connected with inner side of rear longitudinal beam |
| CN104477250A (en) * | 2014-11-13 | 2015-04-01 | 华晨汽车集团控股有限公司 | Automobile front end frame |
| JP2016185738A (en) * | 2015-03-27 | 2016-10-27 | 本田技研工業株式会社 | Rear part structure of vehicle body |
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| JP2022089487A (en) | 2022-06-16 |
| JP7125971B2 (en) | 2022-08-25 |
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