CN115107875A - Vehicle body front structure - Google Patents
Vehicle body front structure Download PDFInfo
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- CN115107875A CN115107875A CN202210021118.7A CN202210021118A CN115107875A CN 115107875 A CN115107875 A CN 115107875A CN 202210021118 A CN202210021118 A CN 202210021118A CN 115107875 A CN115107875 A CN 115107875A
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- vehicle body
- cross
- vehicle
- frame
- sectional
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- 238000005452 bending Methods 0.000 claims description 24
- 238000005192 partition Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 239000013585 weight reducing agent 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
- 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
- B62D21/155—Sub-frames or underguards
-
- 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
Abstract
The present invention can suppress a passing collision with an opposing vehicle having a different height from the front end of the front side frame of the vehicle, and absorb collision energy generated by an SOT collision outside the front end of the front side frame. In a vehicle body front structure (10), a vehicle body frame (11) has: a hat cross-section portion (11c) having flanges (11a, 11b) extending upward and downward on the rear side in the front-rear direction of the vehicle body and having a hat cross-sectional shape; and a first U-shaped section (11e) having a U-shaped cross section, which is configured to have a protruding portion (11d) extending outward in the vehicle width direction on the front side of the hat section. The frame still has: a second U-shaped cross-section portion (14) formed by superposing a separate rectangular plate-shaped upper and lower cross-section enlarging portion (13) on the outer wall of the first U-shaped cross-section portion so as to enlarge the cross-sectional shape of the first U-shaped cross-section portion in the upper and lower direction; and a back plate (15) that closes an opening formed by the first U-shaped cross-section portion (11e) and the second U-shaped cross-section portion (14).
Description
Technical Field
The present invention relates to a vehicle body front structure that absorbs collision energy generated by an sot (small overlap) collision outside the front end portions of front side frames on both sides of a vehicle body.
Background
The SOT collision is a collision in which the overlap amount is small, such as a collision between a corner and an opposing vehicle. As a vehicle body front structure that absorbs collision energy generated by an SOT collision, for example, there is a structure described in patent document 1. In this structure, the front portions of the upper members disposed on both sides of the front of the vehicle body are vertically overlapped with and joined to the lower surface of the front end portion of the front side frame disposed on the inner side in the vehicle width direction than the upper members.
Documents of the prior art
Patent literature
Patent document 1: japanese patent No. 4875508
Patent document 2: japanese patent No. 6546065
Disclosure of Invention
In the vehicle having the structure of patent document 1, since the front portion of the upper member is vertically overlapped and joined with the lower surface of the front end portion of the front side frame (also referred to as "frame"), the vertical height of the front end of the frame becomes large, and the front end of the opposing vehicle lower than the host vehicle does not collide with the front end of the host vehicle, and thus, a vehicle-break can be suppressed. In other words, a wrong-way collision can be suppressed. In this case, the opposing vehicle collides with the front end of the body frame of the host vehicle, and therefore the body frame bends and can absorb the collision energy. However, the SOT collision at the outer side of the frame does not bend the frame and cannot absorb the collision energy.
In the structure described in patent document 2, a portion that is easily bent is provided at a plurality of positions apart in the vehicle longitudinal direction of the front side frame. Thus, the frame can be bent when the SOT collision occurs. However, since the vertical height of the front end of the vehicle frame is small, a cross collision with an opposing vehicle having a vertical height different from the own vehicle cannot be suppressed, and the vehicle frame cannot be bent.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a vehicle body front portion structure that can suppress a cross-over collision with an opposing vehicle having a height different from a front end of a front side frame of a host vehicle and absorb collision energy generated by an SOT collision outside a front end portion of the front side frame.
In order to achieve the above object, a vehicle body front structure according to the present invention includes a front side frame extending in a vehicle body front-rear direction, the front side frame including: a hat cross-sectional portion having a hat cross-sectional shape with a vertically extending flange at a rear side in a front-rear direction of the vehicle body; a first U-shaped cross-sectional portion having a U-shaped cross-sectional shape and including a protruding portion extending outward in the vehicle width direction on a front side of the hat cross-sectional portion; a second U-shaped cross-sectional portion formed by superposing a separate rectangular plate-shaped upper and lower cross-sectional enlarged portion on an outer wall of the first U-shaped cross-sectional portion so as to enlarge a cross-sectional shape of the first U-shaped cross-sectional portion in the upper and lower directions; and a back plate that closes an opening formed by the first U-shaped cross-sectional portion and the second U-shaped cross-sectional portion.
Effects of the invention
According to the present invention, it is possible to obtain a vehicle body front structure that can suppress a cross collision with an opposing vehicle having a different height from the front end of the front side frame of the own vehicle and that can absorb collision energy generated by an SOT collision outside the front end of the front side frame.
Drawings
Fig. 1 is a side view of a vehicle body front structure of an automobile according to the present embodiment.
Fig. 2 is a perspective view showing a structure of the vehicle body front side viewed from the vehicle body diagonally front side, which is indicated by an arrow II shown in fig. 1.
Fig. 3 is a perspective view showing a structure in which the linking plate 16 shown in fig. 2 is removed.
Fig. 4 is a sectional view IV-IV of fig. 1.
Fig. 5 is a sectional view of the V-V section of fig. 1 viewed from above.
Fig. 6 is a plan view showing three bending points of the front side frame.
Fig. 7 is a plan view of the front side frame and the upper member on the left side of the vehicle body.
Fig. 8 is a perspective view showing the structure of the upper member as viewed from the back side (lower surface side).
Fig. 9 is a cross-sectional view IX-IX of fig. 8.
Fig. 10 is a perspective view showing a configuration of a rear surface of the front side frame and the joining member of the upper member and the like, as viewed obliquely upward from the lower side shown by an arrow X in fig. 9.
Fig. 11 is a cross-sectional view XI-XI of fig. 10.
Fig. 12 is a vehicle width direction cross section including a front end portion of the upper member and a protruding portion of a back panel of the front side frame, and a perspective view of the linking panel, as viewed from the vehicle body rear side.
Fig. 13 is a perspective view showing a configuration in which the front end portion of the upper member and the protruding portion of the front side frame are joined to each other by sandwiching the first joining member and the second joining member between them.
Fig. 14 is a perspective view showing a bulkhead extending rearward along the outer wall while being spaced apart from the outer wall in the front side frame.
Description of the reference numerals
10 vehicle body front portion structure
11 front side frame
11Z sawtooth shape front side frame
11a, 11b flanges
11c hat section part
11d projection
11d1 side
11e U cross-section
11g, 11h, 11i, 11n bending points
11j upper wall
11k outer side wall
11m inner side wall
12 upper component
12a front end portion
12a1 side
12c inner side wall
13 upper and lower cross-sectional enlargements
14 second U-shaped cross-sectional part
15 backing plate
17 joining member
17a forward curved flange
17b lateral bending flange
17d first engaging member
17e second engaging member
19 baffle plate
19a lower end part
19b rear end portion
Detailed Description
Constitution of the embodiment
An embodiment of the present invention is described in detail with reference to fig. 1 to 14. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted. In each drawing, "front-rear" indicated by an arrow indicates a front-rear direction of an automobile (not shown), "left-right" indicates a width direction of the automobile, and "up-down" indicates a vertical up-down direction.
Fig. 1 is a side view of a vehicle body front structure of an automobile according to the present embodiment. Fig. 2 is a perspective view showing a structure of the vehicle body front side as viewed from the vehicle body diagonally front side, which is indicated by an arrow II shown in fig. 1. Fig. 3 is a perspective view showing a structure in which the linking plate 16 shown in fig. 2 is removed. Fig. 4 is a sectional view IV-IV of fig. 1. Fig. 5 is a sectional view of the V-V section of fig. 1 viewed from above.
The vehicle body front structure 10 shown in fig. 1 includes: a front side frame 11 (frame 11) provided to extend linearly on both sides of the vehicle body; and an upper member 12 extending outward (also referred to as an outer side) in the vehicle width direction of the frame 11 on both sides. The upper member 12 is curved in an arch shape in a range from above a tire, not shown, to a front portion of the vehicle body, and a front end side of the upper member 12 in the vehicle body is disposed adjacent to a front end side of the frame 11 as shown in fig. 3.
The frame 11 shown in fig. 1 has a hat cross-sectional portion 11c, and the hat cross-sectional portion 11c has flanges 11a and 11b extending vertically on the rear side of the front end of the frame 11 and has a substantially hat cross-sectional shape (see fig. 4). The frame 11 has a first U-shaped cross-sectional portion 11e having a substantially U-shaped cross-sectional shape, and as shown in fig. 3, the first U-shaped cross-sectional portion 11e has a concave-shaped protruding portion 11d extending outward at both ends on the front side of the hat cross-sectional portion 11 c. The first U-shaped cross-sectional portion 11e does not have the flanges 11a and 11b as in the cap cross-sectional portion 11 c.
The frame 11 has a second U-shaped cross-sectional portion 14, and the second U-shaped cross-sectional portion 14 is formed by stacking a separate rectangular plate-shaped upper and lower cross-sectional enlarged portion 13 on the lower side of the outer wall of the first U-shaped cross-sectional portion 11e so that the cross-sectional shape of the first U-shaped cross-sectional portion 11e in the upper and lower directions is enlarged.
The frame 11 has a back plate 15 that closes the opening formed by the first U-shaped cross-sectional portion 11e and the second U-shaped cross-sectional portion 14, and is formed into a hollow frame shape extending in the vehicle body front-rear direction by closing the opening by the back plate 15. As shown in fig. 2, the front end of the second U-shaped cross-section portion 14 of the vehicle body frame 11 and the front end of the upper member 12 are coupled by a coupling plate 16.
As shown in fig. 1, the vertical cross-sectional enlarged portion 13 is formed in a horn shape that gradually expands in the vertical direction from the vehicle body rear side toward the front end of the vehicle body frame 11. When the vehicle is involved in a passing collision with an opposing vehicle, the load input (arrow Y1) is smoothly transmitted in a horn shape and transmitted to the hat cross-section portion 11c on the rear side of the frame 11.
As shown in fig. 5, the upper and lower enlarged cross-sectional portions 13 are formed in a horn shape that gradually flares outward from the vehicle body rear side of the vehicle body frame 11 toward the front end. Due to this horn shape, when the vehicle collides with the SOT of the upper member 12 that is generated in the opposite vehicle, the load input in the oblique direction due to the SOT collision is smoothly transmitted along the horn shape, and is intensively transmitted toward the bending points 11g, 11h, and 11i (fig. 6) on the rear side of the vehicle body frame 11.
As shown in a plan view of the vehicle body frame 11 in fig. 6, the hat cross-section portion 11c of the vehicle body frame 11 has at least three bending points 11g, 11h, 11i in the vehicle body longitudinal direction. Each of the bending points 11g, 11h, and 11i is a depression shaped like く, and when the vehicle collides with the opposing vehicle in the direction indicated by the arrow Y2, the frame 11 is bent in a zigzag shape as indicated by the broken line 11Z. To explain further, in the event of such a collision, the bending point 11g of the hat section portion 11c is bent at a vehicle body outer side position in the vehicle width direction indicated by the arrow Yg, and the bending point 11h is bent at a vehicle body inner side position in the vehicle width direction indicated by the arrow Yh, thereby bending in a zigzag shape as in the vehicle frame 11Z.
Fig. 7 is a plan view of the left side frame 11 and the upper member 12 of the vehicle body as viewed from above. The upper member 12 on the vehicle width direction outer side of the vehicle body frame 11 has a front end portion 12a inclined downward from the vehicle body rear side in an arch-like curve bent toward the vehicle width inner side direction indicated by an arrow Y3.
A V-shaped space is formed by a side surface 11d1 of the protruding portion 11d and a side surface 12a1 of the distal end portion 12a of the upper member 12 on the distal end side of the vehicle body frame 11, wherein the side surface 11d1 is formed by a back plate 15 (fig. 3) in a vertical posture that closes an opening of the protruding portion 11d protruding outward in a horn shape. The joining member 17 is erected below the protruding portion 11d and the distal end portion 12a in a state where the V-shaped space is closed from below.
As shown in fig. 8, the joining member 17 is mounted on the upper member 12 and the back plate 15 (the side surface 11d1 of the protruding portion 11d) and fixed to the connecting plate 16 by bolts and nuts, as viewed from the back surface side (lower surface side) of the upper member 12.
As shown in fig. 9, which is a cross-sectional view of IX-IX of fig. 8, the joining member 17 has a front bending flange 17a provided on the lower surface side of the front end portion of the upper member 12 and bending the front end portion of the joining member 17 to the front side.
The front surface side of the front bent flange 17a, which is the vehicle body front side, is in contact with the connecting plate 16, and a nut 18 constituting a bumper beam fastening portion is fixed to the rear surface side (rear surface side) of the front bent flange 17 a. A through hole is formed in the connecting plate 16 at a position overlapping the screw hole of the nut 18, and a bolt for fixing a bumper beam, not shown, is inserted through the through hole and screwed into the nut 18.
Fig. 10 shows a structure of the rear surface of the joining member 17, the upper member 12, and the like, as viewed obliquely upward from the lower side indicated by an arrow X.
As shown in fig. 10, the upper member 12 is configured such that an inner member 12c having an L-shaped cross section facing the inside in the vehicle width direction and an outer member 12d having an L-shaped cross section facing the outside are combined to have a quadrangular cross section and a hollow shape. The joint member 17 is a V-shaped panel as shown by a broken line L5 in a side view from the right side, and is coupled to the inner member 12c of the front end portion 12a of the upper member 12. The joining member 17 has a side bent flange 17b bent to the side of the vehicle body, and the side bent flange 17b is joined to the outer surface of the back plate 15 constituting the protruding portion 11d of the vehicle body frame 11.
As shown in fig. 11, which is a cross-sectional view XI-XI of fig. 10, the engaging part 17 forms a lower surface (lower wall) of the inside part 12c, which is at least one wall surface of the upper member 12. To explain this, the front end portion 12a of the upper member 12 has a horizontally extending horizontal portion at the front end, and the lower surface (lower wall) of the horizontal portion is constituted by the joining member 17. That is, the joint member 17 is bridged between the outer member 12d and the inner member 12c (fig. 11) of the upper member 12 shown in fig. 10, and forms one wall surface as the inner member 12 c.
Fig. 12 is a cross-sectional view in the vehicle width direction including the front end portion 12a of the upper member 12 and the protruding portion 11d of the back panel 15 of the vehicle frame 11 and the linking panel 16, as viewed from the vehicle body rear side.
As shown in fig. 12, the joint member 17 includes a first joint member 17d that joins the lower side of the back plate 15, which is the protruding portion 11d of the vehicle body frame 11, and the lower side of the front end portion 12a of the upper member 12. The joint member 17 includes a second joint member 17e for joining the upper side of the protruding portion 11d of the frame 11 and the upper side of the front end portion 12a of the upper member 12.
As shown in fig. 3, the second engaging part 17e engages the upper wall 11j of the protruding portion 11d of the frame 11, the outer side wall 11k of the protruding portion 11d formed by the back plate 15, and the inner side wall 12c of the upper member 12. As shown in fig. 12, the second engaging member 17e forms an outer portion of the upper wall 11j by engaging with the upper wall 11j of the projection 11 d. A back plate 15 is joined to the outer portion.
As shown in fig. 3, the vehicle body frame 11 has a bulkhead 19 that is vertically erected and extends along the vehicle body front-rear direction so as to divide the inside into the left and right in the vehicle width direction. The second joining member 17e is joined to the upper end side of the separator 19.
As shown in fig. 3, the frame 11 has the outer side wall 11k and the inner side wall 11m facing the vehicle width inner side. The bulkhead 19 extends rearward along the outer wall 11k while being spaced apart from the outer wall 11k in the vehicle body frame 11, and the extended rear end portion 19b is coupled to the inner wall 11m as shown in fig. 14. The rear end portion 19b is coupled in a state where the end is located at a bending point 11n of the frame 11 indicated by a broken line.
As shown in fig. 14, the projecting portion 11d of the vehicle body frame 11 is higher in height from the rear side toward the front side as indicated by double-headed arrows H1 and H2.
As shown in fig. 3, the lower end portion 19a of the bulkhead 19 is coupled to the lower end portion of the outer side wall 11k of the frame 11. By this coupling, the protruding portion 11d on the vehicle body front side of the vehicle body frame 11 has a large cross-sectional shape extending in the vertical direction.
Effects of the embodiment
Next, the characteristic configuration of the vehicle body front portion structure of the present embodiment described above and the effects thereof will be described. The vehicle body front structure 10 has a front side frame 11 extending in the vehicle body front-rear direction on the vehicle width direction inner side.
(1) In the vehicle body front portion structure 10, the vehicle body frame 11 includes: a hat cross-sectional portion 11c having flanges 11a and 11b extending upward and downward on the rear side in the vehicle body longitudinal direction and having a hat cross-sectional shape; and a first U-shaped cross-sectional portion 11e having a U-shaped cross-sectional shape and including a protruding portion 11d extending outward in the vehicle width direction on the front side of the hat cross-sectional portion 11 c. Further, the frame 11 has; a second U-shaped cross-sectional portion 14 in which a separate rectangular plate-shaped upper and lower cross-sectional enlarged portion 13 is superimposed on the outer wall of the first U-shaped cross-sectional portion 11e so as to enlarge the cross-sectional shape of the first U-shaped cross-sectional portion 11e in the upper and lower direction; and a back plate 15 that closes the opening formed by the first U-shaped cross-sectional portion 11e and the second U-shaped cross-sectional portion 14.
According to this configuration, the upper and lower cross-sectional enlarged portions 13, which are the constituent elements of the second U-shaped cross-sectional portion 14 of the vehicle body frame 11, are formed as separate bodies, and thus there is no need to apply a press die to the vehicle body frame 11, which leads to an increase in size and complication at high cost. Further, since the second U-shaped cross-sectional portion 14 on the front end side of the vehicle frame 11 is enlarged in the vertical direction and becomes high, the vehicle-passing collision with the opposing vehicle having a height different from the height of the vehicle can be suppressed. Therefore, the opposing vehicle collides with the front end of the frame 11 of the host vehicle, and the frame 11 bends and can absorb collision energy.
The frame 11 is formed into a hollow frame shape extending in the vehicle body front-rear direction by closing the openings of the first U-shaped cross-sectional portion 11e and the second U-shaped cross-sectional portion 14 by the back plate 15. With this hollow frame shape, when a collision is made against the front end of the frame 11 (arrow Y1 shown in fig. 3), collision energy is efficiently transmitted along the second U-shaped cross-sectional portion 14 and the cap cross-sectional portion 11 c. Therefore, by connecting the back panel 15 and the upper member 12, the vehicle body frame 11 can be bent to absorb the collision energy when the upper member 12 collides with the SOT.
(2) The upper and lower cross-sectional enlarged portions 13 are formed in a horn shape that gradually flares upward and downward from the vehicle body rear side toward the front end of the vehicle body frame 11.
According to this configuration, when a vehicle crashes against an oncoming vehicle, the load input is efficiently transmitted along the trumpet shape of the upper and lower cross-sectional enlarged portions 13. Therefore, the input load at the time of collision can be efficiently transmitted to the hat cross-sectional portion 11c on the rear side of the frame 11, and therefore the frame 11 can be bent to absorb the collision energy.
(3) The upper and lower cross-sectional enlarged portions 13 are formed in a horn shape that gradually flares outward in the vehicle width direction from the vehicle body rear side toward the front end of the vehicle body frame 11.
According to this configuration, when the vehicle collides with the SOT of the upper member 12 by the opposing vehicle, the oblique load input by the SOT collision is smoothly transmitted along the horn shape, and can be efficiently transmitted toward the bending point on the rear side of the vehicle body frame 11. Therefore, the vehicle body frame 11 can be bent to absorb the collision energy.
(4) The hat cross-section portion 11c of the frame 11 has a plurality of bending points 11g, 11h, 11i that serve as starting points for bending the frame 11 in the vehicle width direction at the time of a frontal collision, and at least three bending points 11g, 11h, 11i are provided at intervals in the front-rear direction.
According to this configuration, when the host vehicle collides with an opposing vehicle, the bending points 11g, 11h, and 11i of the hat cross-section portion 11c bend, and the frame 11 bends in a zigzag shape as shown by the frame 11Z. The bend can absorb the collision energy.
(5) The vehicle body structure further includes an upper member 12 which is disposed on the vehicle-width outer side of the vehicle body frame 11 and curved in an arch shape in the vehicle body front-rear direction, a front end portion 12a of the upper member 12 inclined downward in the front side is bent in the vehicle-width inner direction up to the vicinity of the vehicle body frame 11, and a V-shaped space which is in a V shape in plan view is formed by a side surface of the bent front end portion 12a and a side surface of a protruding portion 11d which protrudes outward in a horn shape on the front end side of the vehicle body frame 11. The V-shaped space has a joint member 17 extending between the distal end portion 12a and the projection 11 d.
According to this configuration, since the side surface 12a1 of the front end portion 12a of the upper member 12 and the side surface 11d1 of the protruding portion 11d of the vehicle body frame 11 have a V-shape spreading from the vehicle body front side toward the rear side, the load at the time of the SOT collision can be dispersed to the vehicle body frame 11 and the upper member 12 as indicated by arrows Y4 and Y5 in fig. 7. Therefore, the plate thicknesses of the frame 11 and the upper member 12 can be reduced to achieve weight reduction.
Further, since the joint member 17 is bridged and joined to the side surface 12a1 of the upper member 12 and the side surface 11d1 of the body frame 11, the joint member can be firmly joined. Therefore, the length L3 of the joint member 17 in the vehicle body longitudinal direction can be made shorter than the length L4 of the joint member 17 from the rear end to the front end of the vehicle body in the vehicle body longitudinal direction, and therefore the length in the vehicle body longitudinal direction can be shortened.
(6) The joining member 17 is a V-shaped panel in side view, and has a vehicle width outer side joined to a lower surface of the front end portion 12a of the upper member 12 and a vehicle width inner side provided with a lateral curved flange 17b formed by bending in the vertical direction, and the lateral curved flange 17b is joined to an outer surface of the protruding portion 11d of the vehicle body frame 11.
With this configuration, load input from the bumper beam fastening portion by the nut 18 shown in fig. 10 at the time of a collision with the opposing vehicle as indicated by arrow Y4 is distributed to the lower surface of the front end portion 12a of the upper member 12 and the outer surface of the protruding portion 11d (the back plate 15) of the vehicle frame 11 via the lateral bent flange 17b as indicated by arrows Y5 and Y6. Therefore, a large load of the SOT collision can be applied to the outer surface of the protruding portion 11d of the vehicle body frame 11, and therefore the vehicle body frame 11 can be bent to absorb the collision energy.
(7) The joint member 17 includes a first joint member 17d for joining the lower side of the protruding portion 11d (back plate 15) of the vehicle body frame 11 and the lower side of the front end portion 12a of the upper member 12, and a second joint member 17e for joining the upper side of the protruding portion 11d of the vehicle body frame 11 and the upper side of the front end portion 12a of the upper member 12.
According to this configuration, the front end portion 12a of the upper member 12 and the protruding portion 11d of the frame 11 are sandwiched and joined vertically by both the first joining member 17d and the second joining member 17 e. Therefore, even if the upper member 12 is configured to be inclined upward with respect to the horizontal frame 11 shown by the horizontal line L7 in a side view in fig. 13 as shown by the inclined line L8, the SOT collision load can be easily dispersed in a V-shape as shown by the horizontal line L7 and the inclined line L8.
(8) The second joining member 17e is configured by joining the upper wall 11j of the protruding portion 11d of the vehicle body frame 11, the outer side wall 11k of the protruding portion 11d formed by the back plate 15, and the inner side wall 12c of the upper member 12.
According to this configuration, a part of the upper wall 11j of the protruding portion 11d of the vehicle body frame 11 can be supported by the second joint member 17e, and thus the vehicle body frame 11 can be reduced in weight.
(9) The second joining member 17e is joined to an upper end side of a partition plate 19 extending in the vehicle body longitudinal direction so as to divide the inside of the vehicle body frame 11 into left and right in the vehicle width direction.
According to this configuration, since the strength and rigidity of the front end of the frame 11 and the projecting portion 11d are improved by the bulkhead 19, the load can be transmitted to the rearward bending points 11g, 11h, and 11i while suppressing deformation due to the SOT collision load.
(10) The bulkhead 19 extends rearward along the outer wall 11k of the vehicle body frame 11 while being spaced apart from the outer wall 11k inside the vehicle body frame 11, and the extended rear end portion 19b is coupled to the inner wall 11m of the vehicle body frame 11.
With this configuration, the SOT collision load (arrow Y1 shown in fig. 1) input to the projecting portion 11d of the vehicle body frame 11 can be transmitted through the bulkhead 19 and the inner and outer side walls 11m, 11k at the rearward bending point 11n of the outer side wall 11 k. Therefore, the frame 11 can be easily bent to have an inwardly convex shape or the like, and impact energy can be absorbed.
(11) The lower end portion 19a of the bulkhead 19 is coupled to the lower end portion of the outer side wall 11k of the frame 11.
According to this configuration, the projection 11d of the vehicle body frame 11 has a large cross-sectional shape extending in the vertical direction, and therefore the input amount of the SOT collision (arrow Y1) can be increased.
The vehicle body structure of the present embodiment has been described above, but the present invention is not limited to this, and can be modified as appropriate within the scope not departing from the gist of the present invention.
Claims (11)
1. A vehicle body front structure having a front side frame extending in a vehicle body front-rear direction, the vehicle body front structure being characterized in that,
the front side frame has:
a hat cross-sectional portion having a hat cross-sectional shape with a vertically extending flange at a rear side in a front-rear direction of the vehicle body;
a first U-shaped cross-sectional portion having a U-shaped cross-sectional shape and including a protruding portion extending outward in the vehicle width direction on a front side of the hat cross-sectional portion;
a second U-shaped cross-sectional portion formed by overlapping a rectangular plate-shaped upper and lower cross-sectional enlarged portion formed as a separate body on an outer wall of the first U-shaped cross-sectional portion so as to enlarge a cross-sectional shape of the first U-shaped cross-sectional portion in the upper and lower directions; and
and a back plate that closes an opening formed by the first U-shaped cross-sectional portion and the second U-shaped cross-sectional portion.
2. The vehicle body front structure according to claim 1,
the upper and lower cross-section enlarging portions are formed in a horn shape that gradually opens in the up-down direction from the vehicle body rear side toward the front end of the front side frame.
3. The vehicle body front structure according to claim 1,
the upper and lower cross-section enlarged portions are formed in a horn shape which is gradually opened outward in the vehicle width direction from the vehicle body rear side toward the front end of the front side frame.
4. The vehicle body front structure according to claim 1,
the cap cross-sectional portion has a plurality of bending points which serve as starting points for bending the front side frame in the vehicle width direction during a frontal collision,
the bending points are at least three spaced intervals in the front-back direction.
5. The vehicle body front structure according to claim 1,
further comprising an upper member which is disposed on the vehicle-widthwise outer side of the front side frame and is curved in an arch shape in the vehicle-body front-rear direction,
a front end portion of the upper member inclined downward in the front side is bent in the vehicle width inner direction up to the vicinity of the front side frame,
a V-shaped space formed by a side surface of the bent front end portion and a side surface of a protruding portion protruding outward in a horn shape on the front end side of the front side frame in a plan view,
the V-shaped space has a joint member that is bridged between the tip portion and the protruding portion.
6. The vehicle body front structure according to claim 5,
the joining member is a V-shaped panel in a side view, and has a vehicle width outer side joined to a lower surface of a front end portion of the upper member, a vehicle width inner side having a side bent flange formed by bending in an up-down direction, and the side bent flange joined to an outer surface of the protruding portion of the front side frame.
7. The vehicle body front structure according to claim 5,
the joint member includes a first joint member that joins a lower side of the protruding portion of the front side frame to a lower side of the front end portion of the upper member, and a second joint member that joins an upper side of the protruding portion of the front side frame to an upper side of the front end portion of the upper member.
8. The vehicle body front structure according to claim 7,
the second joining member is configured by joining an upper wall of the protruding portion of the front side frame, an outer wall of the protruding portion formed by the back panel, and an inner wall of the upper member in the vehicle width inner direction.
9. The vehicle body front structure according to claim 7,
the second joint member is joined to an upper end side of a bulkhead extending in the vehicle body longitudinal direction so as to divide the interior of the front side frame into left and right in the vehicle width direction.
10. The vehicle body front structure according to claim 9,
the partition plate extends rearward along the outer side wall of the front side frame while being spaced apart from the outer side wall of the front side frame, and the extended rear end portion is coupled to the inner side wall of the front side frame.
11. The vehicle body front structure according to claim 10,
the lower end of the partition plate is combined with the lower end of the outer side wall of the front side frame.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-044078 | 2021-03-17 | ||
| JP2021044078A JP7181329B2 (en) | 2021-03-17 | 2021-03-17 | Body front structure |
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| Publication Number | Publication Date |
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| CN115107875A true CN115107875A (en) | 2022-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210021118.7A Pending CN115107875A (en) | 2021-03-17 | 2022-01-10 | Vehicle body front structure |
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| Country | Link |
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| JP (1) | JP7181329B2 (en) |
| CN (1) | CN115107875A (en) |
Citations (7)
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| JPH0340169U (en) * | 1989-08-21 | 1991-04-17 | ||
| JP2006069279A (en) * | 2004-08-31 | 2006-03-16 | Mazda Motor Corp | Rear structure for vehicle body |
| JP2006076504A (en) * | 2004-09-10 | 2006-03-23 | Toyota Motor Corp | Vehicle body rear part structure of vehicle |
| JP2010013053A (en) * | 2008-07-07 | 2010-01-21 | Honda Motor Co Ltd | Rear body structure of vehicle |
| CN106005018A (en) * | 2015-03-27 | 2016-10-12 | 本田技研工业株式会社 | Vehicle front structure |
| CN106608285A (en) * | 2015-10-26 | 2017-05-03 | 本田技研工业株式会社 | Vehicle body front structure |
| CN107042843A (en) * | 2016-02-03 | 2017-08-15 | 本田技研工业株式会社 | Automotive body structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4926018B2 (en) * | 2007-12-06 | 2012-05-09 | 本田技研工業株式会社 | Body front structure |
| JP5211133B2 (en) * | 2010-10-08 | 2013-06-12 | 本田技研工業株式会社 | Body front structure |
| JP6462531B2 (en) * | 2015-03-27 | 2019-01-30 | 本田技研工業株式会社 | Body front structure |
-
2021
- 2021-03-17 JP JP2021044078A patent/JP7181329B2/en active Active
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- 2022-01-10 CN CN202210021118.7A patent/CN115107875A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0340169U (en) * | 1989-08-21 | 1991-04-17 | ||
| JP2006069279A (en) * | 2004-08-31 | 2006-03-16 | Mazda Motor Corp | Rear structure for vehicle body |
| JP2006076504A (en) * | 2004-09-10 | 2006-03-23 | Toyota Motor Corp | Vehicle body rear part structure of vehicle |
| JP2010013053A (en) * | 2008-07-07 | 2010-01-21 | Honda Motor Co Ltd | Rear body structure of vehicle |
| CN106005018A (en) * | 2015-03-27 | 2016-10-12 | 本田技研工业株式会社 | Vehicle front structure |
| CN106608285A (en) * | 2015-10-26 | 2017-05-03 | 本田技研工业株式会社 | Vehicle body front structure |
| CN107042843A (en) * | 2016-02-03 | 2017-08-15 | 本田技研工业株式会社 | Automotive body structure |
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| JP2022143526A (en) | 2022-10-03 |
| JP7181329B2 (en) | 2022-11-30 |
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