CN114590323A - Vehicle body front structure - Google Patents
Vehicle body front structure Download PDFInfo
- Publication number
- CN114590323A CN114590323A CN202111186595.0A CN202111186595A CN114590323A CN 114590323 A CN114590323 A CN 114590323A CN 202111186595 A CN202111186595 A CN 202111186595A CN 114590323 A CN114590323 A CN 114590323A
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- China
- Prior art keywords
- flange
- upper beam
- gusset
- vehicle body
- recess
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000003466 welding Methods 0.000 claims description 34
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 description 10
- 239000011324 bead Substances 0.000 description 8
- 230000003014 reinforcing effect Effects 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Classifications
-
- 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
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
- B62D21/152—Front or rear frames
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention provides a vehicle body front structure, which can reduce the joint operation for hindering the process of jointing a gusset plate to an upper beam. A vehicle body front structure (10) is provided with: an upper beam (16); and a gusset (17) that extends outward in the vehicle width direction from a front side frame (15) provided on the vehicle width direction inner side of the upper rail (16), is connected to the upper rail body (21), and is provided with the vehicle body front structure (10), wherein the gusset (17) has: an upper joining flange that extends from an inner surface of the upper beam body (21) on the inner side in the vehicle width direction over an upper ridge line portion (26) of the upper beam body (21) and overlaps the upper surface of the upper beam body (21), wherein the upper surface of the upper beam body (21) has: the recess (31) is used for positioning the joint with the upper joint flange of the gusset plate (17), and the recess (31) is arranged at the rear side of the rear end part of the upper joint flange or at the front side of the front end part of the upper joint flange.
Description
Technical Field
The present invention relates to a vehicle body front structure.
Background
As a vehicle body front structure, for example, the following structures are disclosed: an upper member (upper member) extends forward of the vehicle body from a front pillar (front pillar) in a state of being disposed on the outside of a front side frame (front side frame) in the vehicle width direction, and the extended upper member is formed into a closed cross section by joining an outer panel (outer panel) and an inner panel (inner panel). Specifically, the outer panel and the inner panel are formed with an upper flange extending upward and a lower flange extending downward, respectively.
The upper beam is formed into a closed cross section by joining the upper flange of the outer panel to the upper flange of the inner panel and joining the lower flange of the outer panel to the lower flange of the inner panel. Therefore, in the upper beam, the joined upper flanges project upward, and the joined lower flanges project downward. The front end of the upper member is connected to the front end of the front side frame via a gusset (gusset) (see, for example, patent document 1).
[ Prior art documents ]
[ patent document ]
[ patent document 1] Japanese patent No. 6062883
Disclosure of Invention
[ problems to be solved by the invention ]
However, in the upper beam of patent document 1, the joined upper flanges project upward, and the joined lower flanges project downward. It is conceivable that the upper and lower flanges projecting in the up-down direction interfere with the use of equipment (tools) such as a welding gun when the gusset is joined to the front end portion of the upper beam by spot welding, for example.
Therefore, in a portion where spot welding is difficult with a device such as a welding gun, for example, joining by metal inert gas welding (MIG welding) or the like by hand is necessary. However, the process of joining the gusset to the upper beam is hindered (hindered) by a manual work process such as metal inert gas welding. Therefore, it is required to reduce the number of working steps such as manually welding the gusset to the upper member by inert gas.
The invention aims to provide a vehicle body front structure, which can reduce the joint operation for hindering the process of jointing a gusset plate to an upper beam.
[ means for solving problems ]
In order to solve the above problems, the present invention proposes the following technical means.
(1) The vehicle body front structure (for example, the vehicle body front structure 10 of the embodiment) of the present invention includes: an upper beam (e.g., upper beam 16 of the embodiment) including an upper beam body (e.g., upper beam body 21 of the embodiment) having a substantially コ -shaped cross section and an upper beam cover member (e.g., upper beam cover member 22 of the embodiment), the upper beam body being open to the outside in the vehicle width direction, the upper beam cover member being joined to the upper beam body so as to close the opening of the upper beam body; and a gusset (for example, a gusset 17 of the embodiment) extending outward in the vehicle width direction from a front side frame (for example, a front side frame 15 of the embodiment) provided on an inner side in the vehicle width direction of the upper member, and connected to the upper member body, the gusset having: an upper joining flange (e.g., a third lid flange (upper joining flange) 74 according to the embodiment) overlapping an upper surface (e.g., an upper surface 25 according to the embodiment) of the upper member body from an inner surface (e.g., an inner surface portion 24 according to the embodiment) on an inner side in the vehicle width direction of the upper member body over a ridge line portion (e.g., an upper ridge line portion 26 according to the embodiment) of the upper member body, the upper surface of the upper member body having: a recess (for example, a recess 31 of the embodiment) is positioned for joining to the upper joining flange of the gusset, and the recess is provided to a rear side of a rear end portion of the upper joining flange or a front side of the upper joining flange.
According to the structure, the upper beam body is approximately コ -shaped in cross section. That is, the upper and lower flanges extending in the up-down direction can be eliminated. Thus, even when the gusset plate connecting the front end of the upper member and the front side frame is joined to the upper member, the welding gun or the like can be applied. Therefore, it is not necessary to manually perform metal inert gas welding or the like, and thus the number of working steps can be reduced.
The upper surface portion of the upper beam body has a recess which serves as a positioning for engagement with the upper joining flange of the gusset. This improves the positioning accuracy when joining the gusset to the upper beam.
The recessed portion functions as a reinforcing rib in the upper surface portion of the upper beam body. This prevents deformation of the periphery of the recess of the upper beam body. Therefore, the front collision load transmitted from the gusset plate at the time of a frontal collision (frontal collision) of the vehicle can be easily transmitted to the rear of the upper beam.
The recess is provided to a rear side of the rear end portion of the upper joining flange of the gusset or a front side of the front end portion of the upper joining flange. That is, the position of the upper joining flange can be appropriately determined within the range where the recess is provided until the rear end of the upper joining flange overlaps the rear end of the recess, or the front end of the upper joining flange overlaps the front end of the recess. Thus, the common upper rail body can be used for vehicles having different lengths of the front side frames and different joining positions of the gusset and the upper rail. Therefore, the upper beam body can be used for vehicles having different power sources (power train) such as gasoline vehicles, hybrid vehicles, and electric vehicles.
(2) The upper joining flange may have a front end portion disposed on a front side of the recess, and the upper joining flange may include: a first seat surface (for example, a first seat surface 74a according to the embodiment) which overlaps the recess and forms a welding point with the upper beam body; and a second seat surface (for example, a second seat surface 74b according to the embodiment) which is formed at a weld point with the upper beam body at a position closer to the vehicle body front than a front end of the recessed portion.
According to the above configuration, the upper joining flange includes the first seat surface overlapping the recess and serving as a welding point with the upper beam body, and the second seat surface serving as a welding point with the upper beam body further toward the vehicle body front side than the front end of the recess. Thus, the upper joining flange is joined to both the recessed portion and a portion other than the recessed portion of the upper beam body. Therefore, the upper engaging flange can be more firmly engaged with the upper beam body. Therefore, the front collision load transmitted from the gusset at the time of a front collision of the vehicle can be easily transmitted to the rear of the upper beam.
(3) The rear end portion of the concave portion may be provided on an inclined portion (for example, an inclined portion 16e in the embodiment) of the upper frame body and above the front side frame.
According to this structure, by "the rear end portion of the concave portion is provided in the inclined portion of the upper beam body", the front side frame side is mainly deformed at a portion of the upper beam body located at the same height as the front side frame to absorb the load at the time of collision. Further, after the front side frame and the upper member are deformed, the load at the time of the deforming collision can be mainly absorbed by the upper member side via the inclined portion of the upper member main body. Therefore, it is possible to prevent deformation of the front side frames from being hindered by the upper frame at the time of a frontal collision of the vehicle.
(4) A bead portion (for example, bead portion 32 according to the embodiment) having a substantially meandering shape may be provided on the inner side surface on the vehicle width direction inner side of the upper member body, and a front end portion of the bead portion may be provided at a position overlapping with a rear end portion of the concave portion in a plan view.
According to the structure, the inner side face of the upper beam body is provided with the deformation rib part. Thus, when a front collision load is applied to the upper member, the deformation beads deform as bending points, and the load can be absorbed. Further, the front end portion of the deformed rib portion is provided at a position overlapping with the rear end portion of the concave portion having the function of the reinforcing rib in a plan view. Therefore, the front collision load loaded on the upper beam can be transmitted to the crush ribs more efficiently. Therefore, the upper beam body can be easily compressively deformed in the longitudinal direction.
(5) The gusset plate has a rear joining flange (for example, a fourth gusset flange 67 in the embodiment) joined to the inner surface of the upper beam body at the vehicle body rear side of the gusset plate, and the rear joining flange is provided at the vehicle body front side of the rear end portion of the recess.
According to the structure, the gusset plate has, on the vehicle body rear side, a rear-side engagement flange that is engaged with the inner side face of the upper beam body. Thereby, the front collision load input to the gusset can be transmitted to the upper beam through the rear side joining flange.
The rear-side joining flange is provided further toward the front of the vehicle body than the rear end portion of the recess. This makes it easy to provide the bending point of the upper beam behind the recess in the vehicle body. Therefore, the deformation of the joining portion of the upper beam with the rear-side joining flange can be suppressed. Therefore, the load can be more efficiently transmitted to the bending point set at the rear of the upper beam. That is, the front collision load can be absorbed more effectively.
[ Effect of the invention ]
According to the present invention, it is possible to provide a vehicle body front structure that can reduce the joining work that hinders the process of joining the gusset to the upper beam.
Drawings
Fig. 1 is a perspective view of a vehicle body front structure according to an embodiment of the present invention.
Fig. 2 is a side view of the vehicle body front structure shown in fig. 1.
Fig. 3 is a perspective view taken along line III-III of fig. 2.
Fig. 4 is a perspective view of the vehicle body front structure according to the embodiment of the present invention, as viewed from the vehicle width direction inner side of the vehicle body rear.
Fig. 5 is a perspective view partially exploded from the vehicle body front structure of fig. 4.
Fig. 6 is an enlarged perspective view of a V portion of fig. 1.
Fig. 7 is a perspective view of the upper beam cover member exploded from the vehicle body front structure of fig. 4.
Fig. 8 is a perspective view of the vehicle body front structure according to the embodiment of the present invention, as viewed from the vehicle width direction inner side in front of the vehicle body.
[ description of symbols ]
10: vehicle body front structure
15: front side frame
16: upper beam
16 e: inclined part
17: gusset plate
21: upper beam body
22: upper beam cover component
22 a: rear end part
31: concave part
31 a: rear end part
32: deformed rib part
32 a: edge line
32 b: front end part
33: opening part
74: third cover flange (Upper joint flange)
74 a: first seat surface
74 b: second seat surface
Detailed Description
Hereinafter, a vehicle body front portion structure 10 according to an embodiment of the present invention will be described with reference to the drawings. In the drawings, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side of the vehicle, and arrow LH indicates the left side of the vehicle. The application, type, and the like of the vehicle are not particularly limited, and an automobile will be exemplified as an embodiment. The vehicle body front structure 10 is a structure formed substantially in bilateral symmetry, and the left side member will be described below, and the description of the right side member will be omitted.
< vehicle >
As shown in fig. 1, the vehicle Ve includes, for example: a side member 12 disposed on the left outer side in the vehicle width direction and extending forward of the vehicle body; and a vehicle body front structure 10 provided at a front portion of the side member 12.
The side member 12 is a member having high rigidity formed with a closed cross section having a rectangular shape, for example, and constitutes a part of a vehicle body lower frame. The front pillar 14 is erected upward from the front end portion 12a of the side member 12.
< front structure of vehicle body >
The vehicle body front structure 10 includes, for example, a front pillar 14, a front side frame 15, an upper beam 16, and a gusset 17.
The front pillar 14 is a member having high rigidity formed as a closed cross section, for example, and constitutes a part of a vehicle body front frame. The front side frame 15 extends forward of the vehicle body from a portion of the side member 12 at the rear of the vehicle body at the front end portion 12a, for example. The front side frame 15 is a member having high rigidity due to a closed cross section formed in a rectangular shape, for example, and constitutes a part of a front frame of the vehicle body. The front side frame 15 is provided on the vehicle width direction inner side of an upper member 16 described later.
< upper beam >
As shown in fig. 1, 2, and 3, the upper beam 16 extends forward and downward of the vehicle body from a portion 14a of the front pillar 14 corresponding to an upper dashboard (upper dashboard)18, for example. The upper member 16 is a member having high rigidity, for example, by being formed into a rectangular closed cross section, and constitutes a part of the vehicle body front frame. The upper member 16 is provided on the vehicle width direction outer side of the front side frame 15. Specifically, the upper beam 16 includes an upper beam body 21 and an upper beam cover member 22.
The upper body 21 includes, for example, an inner side surface portion (inner side surface) 24, an upper surface portion (upper surface) 25, an upper ridge line portion (ridge line portion) 26, a lower surface portion (lower surface) 27, and a lower ridge line portion 28.
The inner side portion 24 is provided on the inner side in the vehicle width direction of the upper beam body 21 and stands vertically in the vertical direction. The upper surface portion 25 extends laterally outward in the vehicle width direction from the upper edge of the inner surface portion 24 so as to intersect the inner surface portion 24. The upper ridge line portion 26 is formed in a ridge line shape by a corner portion protruding outward of the upper beam body 21, by the intersection of the inner side surface portion 24 and the upper surface portion 25.
The lower surface portion 27 extends laterally outward in the vehicle width direction from the lower edge of the inner surface portion 24 so as to intersect the inner surface portion 24. The lower ridge line 28 is formed in a ridge shape by a corner portion protruding to the outside of the upper beam body 21 by the intersection of the inner side surface portion 24 and the lower surface portion 27.
The upper rail body 21 is formed mainly by the inner side surface portion 24, the upper surface portion 25, and the lower surface portion 27 in a substantially コ -shaped cross section that opens outward in the vehicle width direction.
As shown in fig. 4 and 5, the upper beam body 21 has a recess 31 formed in the front portion 21a at the upper surface portion 25. The concave portion 31 is formed in a concave shape so as to be recessed from the upper surface portion 25 toward the inside (i.e., downward) of the upper beam body 21. The recessed portion 31 extends in the vehicle body longitudinal direction by being provided continuously with the front portion 26a of the upper ridge line portion 26.
In the present embodiment, the recess 31 is used, for example, as a positioning (details will be described later) when the gusset 17 (described later) is joined to the upper beam body 21.
Here, the front portion 26a of the upper ridge line portion 26 provided with the recessed portion 31 has a longitudinal direction in the vehicle body front-rear direction. That is, the recessed portion 31 of the upper rail body 21 functions as a reinforcing rib by the front portion 26a of the upper ridge line portion 26, and is not easily deformed against an input of a load from the vehicle body front side. That is, the concave portion 31 has a function of efficiently transmitting the impact load F (see fig. 1) transmitted from the gusset 17 to the upper member 16 by the frontal collision to the vehicle body rear side of the upper member 16.
As shown in fig. 2, the rear end 31a of the recess 31 is provided on the inclined portion 16e of the upper rail body 21 and above the front side frame 15. Here, the inclined portion 16e is a portion (a portion of the upper beam body 21) where the upper ridge line portion 26 and the lower ridge line portion 28 of the upper beam body 21 are inclined with respect to the horizontal direction. Thus, the bending point of the upper beam body 21 can be set above the front side frame 15 in the vehicle body so as to include the inclined portion 16e of the upper beam body 21.
As shown in fig. 4, 5, and 8, the inner surface portion 24 of the upper beam body 21 is provided with a bead portion 32 having a substantially meandering shape. The bead 32 is provided so that the ridge line 32a is at a right angle (at least 45 ° or more) to the vehicle body longitudinal direction. Thus, the bead 32 serves as a so-called bending point and is easily deformed in response to an input (impact load F) in the vehicle longitudinal direction.
The front end 32b of the bead 32 is provided at the same position as the rear end 31a of the recess 31 (at a position overlapping in plan view) in the vehicle body longitudinal direction. As described above, the concave portion 31 of the upper beam body 21 is not easily deformed by the reinforcing rib provided in the concave portion 31. By providing the front end portion 32b of the crush rib 32 at the same position as the rear end portion 31a of the recess 31, the front collision load applied to the upper beam 16 is more efficiently transmitted to the crush rib 32. Therefore, the upper beam body 21 is easily compressively deformed in the longitudinal direction.
As shown in fig. 3, 6, and 7, the opening 33 of the upper rail body 21 is closed by the upper rail cover member 22 from the outside in the vehicle width direction and the front of the vehicle body.
The upper roof rail cover member 22 has an outer side surface portion 41, a cover upper flange 42, a cover lower flange 43, a front surface portion 44, a first front flange (front end portion of the upper roof rail cover member 22) 45, a second front flange 46, and a third front flange 47.
The outer side surface portion 41 is disposed with a gap in the vehicle width direction outer side with respect to the inner side surface portion 24, and is vertically erected in the vertical direction.
The cover upper flange 42 extends laterally outward in the vehicle width direction from the upper edge of the outer side surface portion 41 so as to intersect the outer side surface portion 41. The cover upper flange 42 is joined by spot welding, for example, along the upper outer edge portion 25a in the upper surface portion 25 of the upper beam body 21. The upper flange 16a of the upper member 16 is formed outward in the vehicle width direction by the lid upper flange 42 and the upper outer edge portion 25 a. That is, the upper flange 16a of the upper beam 16 is formed so as not to protrude upward.
The cover lower flange 43 extends laterally outward in the vehicle width direction from the lower edge of the outer side surface portion 41 so as to intersect the outer side surface portion 41. The lid portion lower flange 43 is joined by spot welding, for example, along the lower outer edge portion 27a in the lower surface portion 27 of the upper beam body 21. The lower flange 16b of the upper member 16 is formed outward in the vehicle width direction by the cover lower flange 43 and the lower outer edge portion 27 a. That is, the lower flange 16b of the upper beam 16 is formed so as not to protrude downward.
In this way, the upper flange 16a and the lower flange 16b of the upper beam 16 are formed so as not to protrude upward and downward, respectively.
The front surface portion 44 extends from the front edge 41a of the outer surface portion 41 inward in the vehicle width direction so as to intersect with the outer surface portion 41.
The first front flange 45 extends from the inner edge 44a of the front surface portion 44 toward the front of the vehicle body so as to intersect with the front surface portion 44. The first front flange 45 is joined by spot welding, for example, along the front end portion 24a of the inner side surface portion 24 of the upper beam body 21.
The second front flange 46 extends from the upper edge 44b of the front surface portion 44 toward the front of the vehicle body so as to intersect the front surface portion 44. The second front flange 46 is joined by spot welding, for example, along the front end portion 25b in the upper surface portion 25 of the upper beam body 21.
The third front flange 47 extends from the lower edge 44c of the front surface portion 44 toward the front of the vehicle body so as to intersect with the front surface portion 44. The third front flange 47 is joined by spot welding, for example, along the front end portion 27b in the lower surface portion 27 of the upper beam body 21.
In this way, the lid upper flange 42 is joined to the upper outer edge portion 25a of the upper surface portion 25, and the lid lower flange 43 is joined to the lower outer edge portion 27a of the lower surface portion 27. The first front flange 45 is joined to the front end 24a of the inner side surface portion 24. Further, the second front flange 46 is joined to the front end portion 25b of the upper surface portion 25, and the third front flange 47 is joined to the front end portion 27b of the lower surface portion 27.
Thereby, the upper beam cover member 22 is joined (coupled) in a state where it is accommodated in the opening portion 33 of the upper beam body 21. In this state, the opening 33 of the upper beam body 21 is closed from the outside in the vehicle width direction by the outer side surface portion 41 and from the front of the vehicle body by the front surface portion 44.
The upper beam 16 is formed into a rectangular closed cross section by joining (coupling) the upper beam cover member 22 to the opening 33 of the upper beam body 21.
Further, for example, the rear end portion 22a of the upper beam cover member 22 is coupled (coupled) to the front pillar 14 by a plurality of fastening bolts 49.
< gusset plate >
As shown in fig. 4 and 5, the front end portion 16c of the upper member 16 is coupled (connected) to the front end portion 15a of the front side frame 15 via a gusset 17. That is, the angled gusset 17 is joined to the front end 16c of the upper beam 16.
The gusset 17 extends outward in the vehicle width direction from the front end portion 15a of the front side frame 15, and is connected to the front portion 21a of the upper member body 21. Specifically, the gusset 17 includes a gusset body 52 and a gusset lid 53.
The gusset main body 52 extends (protrudes) outward in the vehicle width direction from the outer side surface 15c of the front end portion 15a of the front side frame 15. Specifically, the gusset plate body 52 includes a gusset plate lower surface portion 61, a gusset plate front surface portion 62, a gusset plate rear surface portion 63, a first gusset plate flange 64, a second gusset plate flange 65, a third gusset plate flange (front side joining flange) 66, a fourth gusset plate flange (rear side joining flange) 67, and a fifth gusset plate flange (lower side joining flange) 68 (see fig. 7).
The gusset lower surface portion 61 extends from the lower surface 15b of the front end portion 15a of the front side frame 15 to the vehicle width direction outer side to the lower surface 16d of the front end portion 16c of the upper member 16. The gusset front surface portion 62 is erected longitudinally from the front edge of the gusset lower surface portion 61 upward so as to intersect with the gusset lower surface portion 61. The gusset rear surface portion 63 is erected longitudinally from the rear edge of the gusset lower surface portion 61 upward so as to intersect with the gusset lower surface portion 61.
The gusset body 52 is formed in a substantially U-shaped cross section by a gusset lower surface portion 61, a gusset front surface portion 62, and a gusset rear surface portion 63.
The first gusset flange 64 projects laterally from the upper edge of the gusset front surface portion 62 toward the front of the vehicle body so as to intersect with the gusset front surface portion 62. The first gusset flange 64 is joined to a first cover flange 72 of the gusset cover 53, which will be described later, by spot welding from below, for example.
The second gusset flange 65 projects laterally from the upper edge of the gusset rear surface portion 63 toward the vehicle body rear side so as to intersect with the gusset rear surface portion 63. The second gusset flange 65 is joined to a second cover flange 73 of the gusset cover 53, which will be described later, by spot welding, for example, from below.
The gusset body 52 is formed in a substantially hat-shaped cross section by a gusset lower surface portion 61, a gusset front surface portion 62, a gusset rear surface portion 63, a first gusset flange 64, and a second gusset flange 65.
The third gusset flange 66 extends from the outer edge 62a of the gusset front surface portion 62 toward the vehicle body front so as to intersect with the gusset front surface portion 62. The third gusset flange 66 is overlapped on the front end portion 24a of the inner side surface portion 24 of the upper beam body 21, for example, and joined by spot welding. The third gusset flange 66 is provided at a distance from the fourth gusset flange 67 toward the front of the vehicle body.
The third gusset flange 66 is disposed below a front shelf portion 77, which will be described later, and is disposed at a position overlapping the front shelf portion 77 in a plan view.
As shown in fig. 1, 6, and 8, the first front flange 45 of the upper rail cover member 22 is joined to the front end portion 24a of the inner side surface portion 24 of the upper rail body 21 from the vehicle width direction outer side. The third gusset flange 66 is joined to the front end 24a of the inner side surface portion 24 from the inside in the vehicle width direction.
Therefore, the first front flange 45 of the upper beam cover member 22 (i.e., the front end portion of the upper beam cover member 22) is joined to the third gusset flange 66 via the front end portion 24a of the inner side surface portion 24. As described above, the rear end portion 22a of the upper beam cover member 22 is coupled (coupled) to the front pillar 14 by the plurality of fastening bolts 49.
As shown in fig. 1 and 7, the first front flange 45 of the upper beam cover member 22 (i.e., the front end portion of the upper beam cover member 22) is joined to the third gusset flange 66. The rear end 22a of the upper beam cover member 22 is coupled to the front pillar 14. Thereby, the upper beam cover member 22 is integrally formed from the first front flange (front end portion) 45 to the rear end portion 22 a.
Therefore, for example, when the impact load F due to a frontal collision is transmitted to the upper beam 16 via the gusset 17, the transmitted impact load can be supported by the upper beam 16.
Further, by integrally forming the upper beam cover member 22 from the first front flange (front end portion) 45 to the rear end portion 22a, it is possible to eliminate the formation of an extra weak portion in the upper beam 16 itself.
Returning to fig. 4 and 5, the fourth gusset flange 67 extends from the outer edge 63a of the gusset rear surface portion 63 toward the vehicle body rear side so as to intersect with the gusset rear surface portion 63. The fourth gusset flange 67 is overlapped on the front end portion 24a of the inner side surface portion 24 of the upper beam body 21 and joined by spot welding, for example.
The fourth gusset flange 67 is disposed below a rear shelf portion 78 described later, and is disposed at a position overlapping the rear shelf portion 78 in a plan view.
As shown in fig. 3 and 7, the fifth gusset flange 68 extends from the outer edge 61a of the gusset lower surface portion 61 outward in the vehicle width direction in the direction in which the gusset lower surface portion 61 extends. The fifth gusset flange 68 is joined so as to overlap the front end portion 27b of the lower surface portion 27 from the inner side surface portion 24 of the upper beam body 21 over the lower ridge line portion 28.
Here, in the upper beam 16, the lower flange 16b is formed so as not to protrude downward. Therefore, when the fifth gusset flange 68 of the gusset 17 is joined to the lower surface portion 27 of the upper beam body 21, equipment (jig) such as a welding gun (electrode rod) can be applied. Thereby, the fifth gusset flange 68 is joined to the lower surface portion 27, for example, by spot welding.
In this way, the third gusset flange 66 and the fourth gusset flange 67 are joined to the front end portion 24a of the inner side surface portion 24 of the upper beam body 21. Further, the fifth gusset flange 68 is joined to the front end portion 27b in the lower surface portion 27 of the upper beam body 21. Thereby, the gusset 17 is joined to the front end portion 16c of the upper beam 16 (specifically, the upper beam body 21).
As shown in fig. 4 and 5, the gusset cover portion 53 extends (protrudes) outward in the vehicle width direction from the upper end of the outer side surface portion 15c of the front end portion 15a of the front side frame 15. Specifically, the gusset lid portion 53 includes a lid body 71, a first lid flange 72, a second lid flange 73, and a third lid flange (upper joining flange) 74.
The gusset body 52 is disposed above the gusset lower surface portion 61. The first lid flange 72 projects from the front edge of the lid body 71 toward the front of the vehicle body. As described above, the first cover flange 72 is joined to the first gusset flange 64, for example, by spot welding from above.
The second lid flange 73 projects rearward of the vehicle body from the rear edge of the lid body 71. As described above, the second cover flange 73 is joined to the second gusset flange 65, for example, by spot welding from above.
The third cover flange 74 extends outward in the vehicle width direction from the outer end 71a of the cover body 71, the outer end 72a of the first cover flange 72, and the outer end 73a of the second cover flange 73. Specifically, the third cover flange 74 is joined so as to overlap the recess 31 and the front end 25b of the upper surface portion 25 from the inner side surface portion 24 of the upper beam body 21 over the upper ridge line portion 26.
Here, in the upper beam 16, an upper flange 16a (see also fig. 3) is formed so as not to protrude upward. Therefore, when the third cover flange 74 of the gusset 17 is joined to the upper surface portion 25 of the upper beam body 21 (specifically, the recess 31 and the distal end portion 25b of the upper surface portion 25), equipment (jig) such as a welding gun (electrode rod) can be applied. Thereby, the third lid flange 74 is joined to the recess 31 and the front end 25b of the upper surface portion 25 by, for example, spot welding.
The third cover flange 74 has a front canopy section 77 formed at an end portion on the front side of the vehicle body, and a rear canopy section (canopy section) 78 formed at an end portion on the rear side of the vehicle body. The front canopy section 77 is joined to the upper surface section 25 from the inner surface section 24 of the upper beam body 21 over the upper ridge line section 26. That is, the front shelf portion 77 is formed in a V-shaped cross section. The front canopy section 77 is disposed above the third gusset flange 66, and as described above, is disposed at a position overlapping the third gusset flange 66 in the vertical direction in plan view.
The rear shelf portion 78 is joined to the recessed portion 31 across the upper ridge portion 26 of the upper beam body 21. That is, the rear shelf portion 78 is formed in a V-shaped cross section. The rear shelf portion 78 is disposed above the fourth gusset flange 67, and as described above, is disposed at a position overlapping the fourth gusset flange 67 in the vertical direction in plan view.
As shown in fig. 3 and 4, the third cover flange 74 has a front shelf portion 77 and a rear shelf portion 78. The front canopy section 77 extends from the inner side surface section 24 of the upper beam body 21 to the upper surface section 25 via the upper ridge line section 26 by passing over the upper ridge line section 26. Therefore, the joining strength to the upper beam body 21 by the front canopy section 77 can be made strong. The front canopy section 77 is disposed so as to overlap the third gusset flange 66 in plan view.
Further, the rear shelf portion 78 extends from the inner side surface portion 24 of the upper beam body 21 to the upper surface portion 25 via the upper ridge line portion 26 by passing over the upper ridge line portion 26. Therefore, the joining strength to the upper beam body 21 by the rear canopy section 78 can be made strong. The rear shelf portion 78 is disposed so as to overlap the fourth gusset flange 67 in plan view.
Thus, the front and rear shelf sections 77 and 78 having strong bonding strength can be used to suppress: the impact load F (see fig. 1) input by the frontal collision causes the joint portion of the upper beam body 21 of the third gusset flange 66 and the fourth gusset flange 67 to break.
In the present embodiment, the fourth gusset flange 67 is provided further toward the front of the vehicle body than the rear end portion 31a of the recess 31. As described above, the bending point of the upper beam body 21 is provided further to the vehicle rear side than the rear end portion 31a of the recess 31. This makes it possible to more efficiently transmit the impact load F to the bending point set at the rear of the upper beam 16.
The positioning of the recess 31 and the gusset 17 is performed as follows. That is, the front shelf portion 77 and the rear shelf portion 78 of the third cover flange 74 are formed in accordance with the shape of the recess 31. Here, it is desirable to use the upper beam 16 for different vehicle types of power sources. Therefore, the gusset 17 can be attached to the recess 31 at an appropriate position by appropriately setting the shapes of the front and rear shelf portions 77 and 78 of the third cover flange 74 for each vehicle type.
Therefore, the recess 31 is preferably provided further to the rear side than the rear end portion of the third cover flange 74 or further to the front side than the front end portion of the third cover flange 74.
As shown in fig. 4, when the distal end portion of the third cover flange 74 is disposed further forward than the recess 31, a portion where the third cover flange 74 overlaps the recess 31 and becomes a welding point may be defined as a first seat surface 74a, and a portion where the third cover flange 74 overlaps the upper beam body 21 and becomes a welding point further forward than the front end of the recess 31 may be defined as a second seat surface 74 b.
As described above, according to the vehicle body front structure 10 of the present embodiment, the upper rail body 21 has a substantially コ -shaped cross section. That is, the upper and lower flanges extending in the up-down direction can be eliminated. Thus, even when the gusset 17 connecting the front end of the upper member and the front side frame 15 is joined to the upper member 16, a welding torch or the like can be applied. Therefore, it is not necessary to manually perform metal inert gas welding or the like, and thus the number of working steps can be reduced.
The upper surface portion 25 of the upper beam body 21 may have a recess 31, and the recess 31 is positioned to be engaged with the third cover flange 74 of the gusset 17. This improves the positioning accuracy when joining the gusset 17 to the upper beam 16.
Further, the concave portion 31 functions as a reinforcing rib in the upper surface portion 25 of the upper beam body 21. This prevents deformation of the periphery of the recess 31 of the upper beam body 21. Therefore, the front collision load transmitted from the gusset 17 at the time of a frontal collision (front collision) of the vehicle Ve can be easily transmitted to the rear of the upper beam 16.
The recess 31 is provided further to the rear side than the rear end of the third cover flange 74 of the gusset 17 or further to the front side than the front end of the third cover flange 74. Thus, the common upper beam body 21 can be applied to the vehicle Ve in which the gusset 17 and the upper beam 16 are joined at different positions due to the difference in length of the front side frame 15. Therefore, the upper beam body 21 can be used for vehicles Ve having different power sources, such as gasoline vehicles, hybrid vehicles, and electric vehicles.
Further, the third cover flange 74 includes: a first seat surface 74a overlapping the recess 31 and forming a welding point with the upper beam body 21; and a second seat surface 74b that is welded to the upper beam body 21 further toward the front of the vehicle body than the front end of the recess 31. Thereby, the third cover flange 74 is joined to both the recess 31 of the upper beam body 21 and a portion other than the recess 31. Therefore, the third cover flange 74 can be more firmly engaged with the upper beam body 21. Therefore, the front collision load transmitted from the gusset 17 at the time of a front collision of the vehicle Ve can be easily transmitted to the rear of the upper beam.
Further, by "the rear end portion 31a of the concave portion 31 is provided in the inclined portion 16 e" of the upper beam body 21 ", the front side frame 15 side is mainly deformed at a portion of the upper beam body 21 located at the same height as the front side frame 15 to absorb the load at the time of collision. Further, after the front side frame 15 and the upper member 16 are deformed, the load at the time of the deforming collision can be mainly absorbed by the upper member 16 side by the inclined portion 16e of the upper member main body 21. Therefore, it is possible to prevent deformation of the front side frame 15 from being hindered by the upper member 16 at the time of a front collision of the vehicle Ve.
Furthermore, the inner side surface portion 24 of the upper beam body 21 is provided with a deformed rib portion 32. Thus, when a frontal collision load is applied to the upper beam 16, the crush ribs 32 are deformed as bending points, whereby the load can be absorbed. Further, the front end portion 32b of the deformed rib portion 32 is provided at a position overlapping the rear end portion 31a of the concave portion 31 having the function of the reinforcing rib in a plan view. Therefore, the front collision load loaded on the upper beam 16 can be transmitted to the crush ribs 32 more efficiently. Therefore, the upper beam body 21 can be easily compression-deformed in the longitudinal direction.
The gusset 17 has a fourth gusset flange 67 on the vehicle body rear side, which is joined to the inner surface of the upper member body 21. Thereby, the front collision load input to the gusset 17 can be transmitted to the upper beam 16 through the fourth gusset flange 67.
The fourth gusset flange 67 is provided further toward the front of the vehicle body than the rear end 31a of the recess 31. This makes it easy to set the bending point of the upper member 16 to the rear of the vehicle body with respect to the recess 31. Therefore, the upper beam 16 is prevented from being deformed at the joint portion between the fourth gusset flange 67 and the upper beam 16. Therefore, the load can be more efficiently transmitted to the bending point set at the rear of the upper beam 16. That is, the front collision load can be absorbed more effectively.
In the embodiment, the example in which the front shelf portion 77 and the rear shelf portion 78 are formed in the third cover flange 74 is described, but the invention is not limited thereto. As another example, for example, one of the front shelf portion 77 and the rear shelf portion 78 may be formed in the third cover flange 74.
In the embodiment, an example in which the third cover flange 74 can be positioned by the upper ridge portion 26, the upper surface portion 25, and the like, and the fifth gusset flange 68 can be positioned by the lower ridge portion 28, the lower surface portion 27, and the like has been described, but the present invention is not limited thereto. As another example, for example, it may be possible to position one of the third cover flange 74 and the fifth gusset flange 68.
In the embodiment, the third cover flange 74 is joined to the upper surface portion 25 from the inner surface portion 24 over the upper ridge portion 26, and the fifth gusset flange 68 is joined to the lower surface portion 27 from the inner surface portion 24 over the lower ridge portion 28. As another example, for example, one of the third cover flange 74 and the fifth gusset flange 68 may be joined as in the embodiment.
The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.
In addition, the structural elements of the embodiments may be replaced with well-known structural elements as appropriate within a range not departing from the gist of the present invention, and the modifications may be combined as appropriate.
Claims (5)
1. A vehicle body front structure comprising:
an upper beam including an upper beam body having a substantially コ -shaped cross section and an upper beam cover member, the upper beam body being open to the outside in the vehicle width direction, the upper beam cover member being coupled to the upper beam body so as to close an opening of the upper beam body; and
a gusset plate extending outward in the vehicle width direction from a front side frame provided on an inner side in the vehicle width direction of the upper frame, connected to the upper frame body, and characterized in that the vehicle body front structure,
the gusset plate has: an upper joining flange that overlaps the upper surface of the upper member body from an inner side surface of the upper member body on the vehicle width direction inner side across a ridge line portion of the upper member body,
the upper surface of the upper beam body has: a recess portion which is positioned for engagement with the upper engagement flange of the gusset,
the recess is provided to a rear side of a rear end portion of the upper joining flange or a front side of a front end portion of the upper joining flange.
2. The vehicle body front structure according to claim 1,
the front end portion of the upper engagement flange is disposed further to the front side than the recess portion,
the upper joining flange includes: a first seat surface overlapping the recess and forming a welding point with the upper beam body; and a second seat surface which is located further toward the front of the vehicle body than the front end of the recessed portion and which is a weld point with the upper beam body.
3. The vehicle body front structure according to claim 1,
the rear end of the recess is provided in the inclined portion of the upper beam body and above the front side frame with respect to the vehicle body.
4. The vehicle body front structure according to claim 1,
a rib portion having a substantially meandering shape is provided on the inner side surface of the upper member body on the inner side in the vehicle width direction,
the front end of the deformed rib portion is provided at a position overlapping the rear end of the recess in a plan view.
5. The vehicle body front structure according to claim 1,
the gusset plate has a rear-side joining flange joined to an inner side surface of the upper beam body on a vehicle body rear side of the gusset plate,
the rear-side joining flange is provided further toward the front of the vehicle body than the rear end portion of the recess.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-201906 | 2020-12-04 | ||
| JP2020201906A JP7177815B2 (en) | 2020-12-04 | 2020-12-04 | Body front structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114590323A true CN114590323A (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111186595.0A Pending CN114590323A (en) | 2020-12-04 | 2021-10-12 | Vehicle body front structure |
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| JP (1) | JP7177815B2 (en) |
| CN (1) | CN114590323A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012035704A (en) * | 2010-08-05 | 2012-02-23 | Honda Motor Co Ltd | Vehicle body front structure |
| CN105905169A (en) * | 2015-02-19 | 2016-08-31 | 本田技研工业株式会社 | Vehicle Front Body Structure |
| CN106995011A (en) * | 2015-09-29 | 2017-08-01 | 本田技研工业株式会社 | Vehicle body front structure |
| CN107031722A (en) * | 2015-10-26 | 2017-08-11 | 本田技研工业株式会社 | Car body fore part arrangement |
| CN109476348A (en) * | 2016-07-21 | 2019-03-15 | 本田技研工业株式会社 | Car body fore part arrangement |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0419279A (en) * | 1990-05-11 | 1992-01-23 | Nissan Motor Co Ltd | Car body front part structure for automobile |
| JP2013248898A (en) * | 2012-05-30 | 2013-12-12 | Honda Motor Co Ltd | Vehicle body front structure |
| JP6215979B2 (en) * | 2016-02-01 | 2017-10-18 | 本田技研工業株式会社 | Auto body structure |
| JP6535366B2 (en) * | 2017-05-29 | 2019-06-26 | 本田技研工業株式会社 | Front body structure |
-
2020
- 2020-12-04 JP JP2020201906A patent/JP7177815B2/en active Active
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2021
- 2021-10-12 CN CN202111186595.0A patent/CN114590323A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012035704A (en) * | 2010-08-05 | 2012-02-23 | Honda Motor Co Ltd | Vehicle body front structure |
| CN105905169A (en) * | 2015-02-19 | 2016-08-31 | 本田技研工业株式会社 | Vehicle Front Body Structure |
| CN106995011A (en) * | 2015-09-29 | 2017-08-01 | 本田技研工业株式会社 | Vehicle body front structure |
| CN107031722A (en) * | 2015-10-26 | 2017-08-11 | 本田技研工业株式会社 | Car body fore part arrangement |
| CN109476348A (en) * | 2016-07-21 | 2019-03-15 | 本田技研工业株式会社 | Car body fore part arrangement |
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| Publication number | Publication date |
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| JP2022089485A (en) | 2022-06-16 |
| JP7177815B2 (en) | 2022-11-24 |
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