CN108928395B - Vehicle body front structure - Google Patents
Vehicle body front structure Download PDFInfo
- Publication number
- CN108928395B CN108928395B CN201810463710.6A CN201810463710A CN108928395B CN 108928395 B CN108928395 B CN 108928395B CN 201810463710 A CN201810463710 A CN 201810463710A CN 108928395 B CN108928395 B CN 108928395B
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- Prior art keywords
- vehicle
- width direction
- upper member
- vehicle width
- vehicle body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
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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 absorb load even if the space of the space in a rectangular frame is enlarged compared with the prior art. The vehicle body front structure includes: a pair of left and right front side frames (12, 12) extending in the vehicle front-rear direction; a pair of left and right upper members (14, 14) that are respectively disposed on the vehicle width direction outer sides of the front side frames (12, 12) and extend in the vehicle front-rear direction, each upper member (14) having: an upper member lower part (14b) on the vehicle front side, which inclines towards the outside of the vehicle width direction; and a fragile portion (140) provided on the inside in the vehicle width direction.
Description
Technical Field
The present invention relates to a vehicle body front structure of a vehicle such as an automobile.
Background
For example, patent document 1 discloses a rectangular frame body in front view, which is composed of a side support and a lower partition member of a front partition, an upper member, and a coupling member. A space portion for accommodating a lamp unit such as a fog lamp is formed inside the rectangular housing.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 5470340
Disclosure of Invention
However, when the space in the space portion of the housing is enlarged by further adding another component, for example, it is conceivable to bend the upper member outward in the vehicle width direction. However, when simply bending the upper member outward, for example, there are problems as follows: when a frontal collision load is input to the upper member, the upper member deforms or bends outward, so that the frontal collision load cannot be absorbed efficiently.
The present invention has been made in view of the above problems, and an object thereof is to provide a vehicle body front structure capable of absorbing a load even when a space in a space portion in a rectangular frame is enlarged as compared with a conventional structure.
In order to achieve the above object, the present invention is characterized by comprising: a pair of left and right front side frames extending in the vehicle front-rear direction; and a pair of left and right upper members disposed on the vehicle width direction outer sides of the front side frames, respectively, and extending in the vehicle front-rear direction, each of the upper members including: a front end portion on the vehicle front side, which is inclined outward in the vehicle width direction; and a fragile portion provided on an inner side in the vehicle width direction.
Effects of the invention
In the present invention, a vehicle body front structure capable of absorbing a load even when the space in the space portion in the rectangular frame is larger than that in the conventional case can be obtained.
Drawings
Fig. 1 is a partial structural front view of a vehicle body front portion to which a vehicle body front portion structure according to an embodiment of the present invention is applied.
Fig. 2 (a) is a partial perspective view of the right side of the front portion of the vehicle body shown in fig. 1, and fig. 2 (b) is a partial enlarged view of portion a shown in fig. 2 (a).
Fig. 3 is a partially enlarged front view of the right side of the front portion of the vehicle body shown in fig. 1.
Fig. 4 is a partially enlarged perspective view showing a state in which the bracket is removed from the coupling portion between the front inner member and the rear inner member.
Fig. 5 is a partially enlarged perspective view showing a state in which a bracket is attached to a coupling portion between the front inner member and the rear inner member.
Fig. 6 is a side view of the lower portion of the upper member of the right upper member.
Fig. 7 is a perspective side view of the lower portion of the upper member shown in fig. 6.
Fig. 8 (a) is a plan view of the coupling member, and fig. 8 (b) is a bottom view of the coupling member.
Fig. 9 (a) is a plan view of the front member constituting the connecting member, and fig. 9 (b) is a plan view of the rear member.
Fig. 10 is an exploded side view showing a state in which a front side member and a rear side member constituting a coupling member are coupled in the vehicle longitudinal direction.
Description of the reference numerals
10 front part of vehicle body
12 front side frame
14 upper component
14b Upper Member lower part (tip part)
16 connecting member
100 shock absorber shell
108a front inner part
108b rear inner part
110 Upper outer member (outer member)
112 frangible portion
124 gap
126 bracket
134 water tank
140 other frangible portions
146 frame body
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the drawings, "front-rear" indicates a vehicle front-rear direction, "left-right" indicates a vehicle width direction (left-right direction), and "up-down" indicates a vertical up-down direction.
A vehicle to which the vehicle body front portion structure of the embodiment of the invention is applied has a vehicle body constituted by a frameless vehicle body. The vehicle body is disposed in bilateral symmetry with respect to a center line, not shown, that passes through the center in the vehicle width direction of the vehicle and extends in the vehicle front-rear direction.
As shown in fig. 1, the vehicle body front portion 10 is configured to include a pair of left and right front side frames 12, a pair of left and right upper members 14, a pair of left and right coupling members 16, a front bulkhead 18, a damper housing 100, and a damper base 102 (see fig. 2 (a)).
As shown in fig. 2 (a), a pair of left and right shock absorber housings 100, 100 for housing shock absorbers (not shown) is provided above the vehicle rear end portion of each front side frame 12. A pair of left and right damper bases 102 and 102 for supporting a damper, not shown, are provided at an upper portion of each damper housing 100. In fig. 2 (a), only the right damper housing 100 and the right damper base 102 are illustrated, and the left damper housing 100 and the left damper base 102 are not illustrated.
The damper housing 100 is disposed between each upper member 14 and each front side frame 12 along the vehicle width direction. The damper housing 100 is fixed to the inner side wall of the upper member 14 and the outer side wall of the front side frame 12 via a plurality of side flange portions 103 (in fig. 2 (a), only the side flange portion 103 joined to the upper member 14 is shown). The damper housing 100 and the damper base 102 are formed of a member having higher rigidity and strength than the upper member 14.
As shown in fig. 1, a pair of left and right front side frames 12, 12 are disposed on the left and right sides in the vehicle width direction, respectively, and extend in the vehicle front-rear direction. The vehicle rear end portion of each front side frame 12 is branched into two branches and connected to a cross member, not shown.
The pair of left and right upper members 14, 14 are disposed on the vehicle width direction outer sides of the pair of left and right front side frames 12, respectively, and extend in the vehicle front-rear direction. The vehicle rear end portion of each upper member 14 is connected to a pair of left and right front pillars, not shown.
As shown in fig. 2 (a), each upper member 14 is composed of an upper member upper portion 14a and an upper member lower portion (a front end portion on the vehicle front side) 14 b. The upper member upper portion 14a extends downward at a downward gradient from a front pillar, not shown, toward the vehicle front. The upper member lower portion 14b extends in the vertical direction from the upper member upper portion 14a toward the vehicle lower side with a downward gradient.
The upper member lower portion 14b located on the vehicle front side with respect to the upper member upper portion 14a is inclined outward in the vehicle width direction. That is, as shown in fig. 3, both the outer edge 104 and the inner edge 106 of the upper member lower portion 14b along the vehicle width direction are inclined outward such that the distance (offset amount) from the virtual outer edge and the virtual inner edge indicated by the vertical line V increases toward the tip end of the upper member lower portion 14 b. The amounts of outward inclination of the outer edge 104 and the inner edge 106 of the upper member lower portion 14b may be set to be the same as each other, or may be set to be different from each other.
As shown in fig. 2 (a), each upper member 14 (upper member lower portion 14b) has a fragile portion 112 provided on the vehicle width direction inner side. The fragile portion 112 is formed by a notch portion 114.
The notch 114 is formed by cutting a corner of an inner flange 116 of the upper member inner 108 into a substantially L shape in the upper member lower portion 14b connected to the upper member upper portion 14a (see fig. 2 (b)). By cutting the inner side flange 116 of the upper member inner member 108, the inner side flange 118 of the upper member outer member (outer member) 110 is exposed. In the present embodiment, the notch portion 114 is illustrated as the weak portion 112, but the present invention is not limited thereto, and other structures may be used instead.
In the present embodiment, the notch portion 114 as the weak portion 112 is disposed at a position on the inner side of the upper member 14 in the vehicle width direction and close to the damper housing 100, but is not limited thereto. The notch 114 as the weak portion 112 may be disposed at any position inside the upper member 14 in the vehicle width direction and between the connecting member 16 and the damper housing 100.
For each upper member 14, the upper member inner member 108 and the upper member outer member 110 have a closed cross section, and the flanges are integrally joined to each other. As shown in fig. 4, the upper member upper portion 14a located at the vehicle rear side has a front inner 108a on the vehicle front side and a rear inner 108b on the vehicle rear side. Fig. 4 shows a state in which the bracket 126 is removed from the coupling portion between the front inner member 108a and the rear inner member 108b shown in fig. 5.
As shown in fig. 4, in the right upper member 14, a substantially rectangular outer notch 120 is formed in the vehicle rear upper end portion of the front inner 108 a. An outer cutout 122 having a substantially rectangular shape is formed in an upper end portion of the rear inner 108b in the vehicle front direction. A substantially rectangular gap 124 is formed by the outer notch 120 of the front inner part 108a and the outer notch 122 of the rear inner part 108 b. Further, the outer member 110 disposed outside the front inner member 108a and the rear inner member 108b is continuously formed.
The gap 124 is joined (covered) by a bracket 126 that connects the front inner 108a and the rear inner 108 b. In other words, the gap 124 is provided at the joint between the front inner 108a and the rear inner 108 b.
As shown in fig. 5, the bracket 126 includes a bracket main body 128 having a patch shape and a support portion 132 provided on an upper portion of the bracket main body 128 and having a bolt mounting hole 130 formed therein. The bracket 126 holds a water tank 134 (see fig. 2 a), and the water tank 134 is attached to the support portion 132 by a bolt (not shown).
The upper member outer 110, the front inner 108a, and the bracket 126 are integrally joined to each other by spot welding or the like. The upper member outer 110, the rear inner 108b, and the bracket 126 are integrally joined to each other by spot welding or the like.
As shown in fig. 6, another weak portion 140 is provided on the vehicle width direction outer side of the upper member lower portion 14b of the right upper member 14. The other weak portion 140 is constituted by a 1 st rigid rib (bead)142 and a 2 nd rigid rib 144 arranged at a predetermined interval. The 1 st rigid rib 142 is positioned in the vehicle front and is formed of a concave portion having a substantially arc shape in a side view. The 2 nd rigid rib 144 is located more rearward in the vehicle than the 1 st rigid rib 142 and is configured with a concave portion having a substantially arc shape in a side view. As shown in the perspective side view of fig. 7, the 1 st rigid rib 142 is located on the outer side in the vehicle width direction of the connecting member 16. The 1 st rigid rib 142 extends in the up-down direction along the upper member lower portion 14b extending in the up-down direction. By providing the 1 st and 2 nd rigid ribs 142, 144 on the outer side in the vehicle width direction of the upper member lower portion 14b of the right upper member 14, it is possible to improve the load bearing performance in the vehicle width direction (left-right direction) and reduce the load bearing performance in the vehicle front-rear direction. Further, the upper member upper portion 14a is formed in a two-piece shape obtained by dividing the upper and lower members, and the inner side thereof is joined to the damper housing 100, so that the load in the vehicle longitudinal direction can be efficiently transmitted to the front pillar side, not shown.
Returning to fig. 1, the dash panel 18 is disposed at the vehicle front end portion. The front bulkhead 18 is composed of a pair of left and right side supports 34, an upper bulkhead member 36, and a lower bulkhead member 38. The pair of left and right side supports 34, 34 are disposed substantially in parallel in the vertical up-down direction at positions near the distal end portions of the pair of left and right front side frames 12, respectively.
Further, a frame 146 having a substantially rectangular shape in front view is disposed in front of the vehicle. The frame 146 is composed of a connecting member 16, a vehicle width direction end portion of the lower bulkhead member 38, the upper member 14, and the side stay 34, wherein the connecting member 16 is positioned on the upper side and extends in the vehicle width direction, the lower bulkhead member 38 is positioned on the lower side and extends in the vehicle width direction, the upper member 14 is positioned on the outer side in the vehicle width direction and extends in the vertical up-down direction, and the side stay 34 is positioned on the inner side in the vehicle width direction and extends in the vertical up-down direction. A space 148 is formed inside the frame 146. In the space portion 148, for example, lamps such as a fog lamp, a sensor, and the like are housed.
The upper bulkhead member 36 is stretched between the upper end portions of the pair of left and right side supports 34, 34 in the vehicle width direction. The upper partition member 36 is formed with an open cross section having a substantially コ -shaped vertical cross section. The opening of the open cross-section faces downwards. In the space formed by the open cross section, for example, a wire harness electrically connected to a hood opening/closing sensor for detecting an open/closed state of an unillustrated hood, a bracket for attaching an unillustrated hood lock portion, and the like are housed.
The lower bulkhead member 38 is stretched in the vehicle width direction between the lower end portions of the pair of left and right upper member lower portions 14b, 14 b. The lower partition member 38 is located substantially below the upper partition member 36 in the vertical up-down direction. The lower bulkhead member 38 extends on both sides in the vehicle width direction with respect to the side stay 34, and is coupled to the upper member lower portions 14, 14.
As shown in fig. 1, the left connecting member 16 is disposed between the left upper member 14 and the left front side frame 12. The right connecting member 16 is disposed between the right upper member 14 and the right front side frame 12. Each of the connecting members 16 connects the pair of left and right upper members 14, 14 and the pair of left and right front side frames 12, 12 to each other in the vehicle width direction. Each coupling member 16 is formed of a member having higher rigidity and higher strength than the upper member 14.
As shown in fig. 8 (a), 8 (b), 9 (a), 9 (b) and 10, each connecting member 16 is composed of a front side member 16a positioned in front of the vehicle and a rear side member 16b positioned in rear of the vehicle. The front member 16a and the rear member 16b are integrally joined (joined) by, for example, a welding structure (not shown). The front side member 16a has higher strength than the rear side member 16 b.
Further, each of the coupling members 16 is such that the upper and lower surfaces of each of the front side member 16a and the rear side member 16b are fixed to each other in the vehicle front-rear direction. That is, the upper flange portion 24 of the front side member 16a and the upper flange portion 30 of the rear side member 16b are integrally joined to each other by, for example, a welding means (not shown) in a state where they are connected to each other in the vehicle longitudinal direction, and the lower flange portion 26 of the front side member 16a and the lower flange portion 32 of the rear side member 16b are integrally joined to each other by, for example, a welding means (not shown) in a state where they are connected to each other in the vehicle longitudinal direction (see fig. 8). In fig. 8 (a) and 8 (b), the symbol "x" indicates a joint portion where the front member 16a and the rear member 16b are joined.
The front piece 16a has a hat-shaped cross section perpendicular to the longitudinal direction thereof (see fig. 10). As shown in fig. 9 (a), the front member 16a includes a front surface portion 20, an upper surface portion 21, side flange portions 22a and 22b, an upper flange portion 24, a lower flange portion 26 (see fig. 8), and a lower surface portion 29 (see fig. 10).
The front surface portion 20 is formed in a substantially rectangular shape when viewed from the front side of the vehicle, and extends in the vehicle width direction on a substantially vertical plane. One side flange portion 22a is positioned on the vehicle width direction outer side of the front surface portion 20, and is connected (joined) at three points to the upper member 14 (upper member lower portion 14 b). The other side flange portion 22b is positioned on the vehicle width direction inner side of the front surface portion 20, and is connected (joined) at three points to the front side frame 12. The upper surface portion 21 and the lower surface portion 29 face each other in a substantially vertical up-down direction.
As shown in fig. 10, the upper flange portion 24 is formed by being bent at an upward right slope at the vehicle rear side of the upper surface portion 21. The lower flange portion 26 is formed by being bent at a downward left gradient in the vehicle rear direction of the lower surface portion 29. A plurality of slits 27 extending in the vehicle longitudinal direction are provided in parallel in the upper surface portion 21.
As shown in fig. 9 (b) and 10, the rear member 16b includes: a substantially rectangular front surface portion 28 facing the front surface portion 20 of the front side member 16 a; an upper flange portion 30 formed above the front surface portion 28 and joined to the upper flange portion 24 of the front member 16a at three points; and a lower flange portion 32 joined to the lower flange portion 26 of the front member 16a at three points (see fig. 8 (a) and 8 (b)). As shown in fig. 10, the upper surface portion 21 of the front side member 16a extends longer toward the vehicle rear side than the lower surface portion 29. Thereby, the front surface portion 28 of the rear side member 16b facing the vehicle rear is joined to the front surface portion 20 of the front side member 16a facing the vehicle front in a state of being inclined upward to the right.
The vehicle body front portion 10 to which the vehicle body front portion structure of the present embodiment is applied is basically configured as described above, and the operational effects thereof will be described below.
In the present embodiment, the upper member lower portion 14b (the outer edge 104 and the inner edge 106) of the upper member 14 is inclined outward in the vehicle width direction, whereby the storage space in the space portion 148 of the rectangular frame 146 is increased. Thus, for example, components such as a sensor can be additionally accommodated in the space portion 148 of the housing.
In the present embodiment, a weak portion 112 is provided on the inside of the upper member 14 in the vehicle width direction at a position between the connecting member 16 and the damper housing 100. Thus, in the present embodiment, even when the upper member lower portion 14b, which is the distal end portion of the upper member 14, is inclined outward in the vehicle width direction, the collision load input to the upper member 14 is absorbed by the fragile portion 112, and outward bending of the upper member 14 can be suppressed. In other words, when a collision load is input to the upper member 14, the upper member 14 is easily deformed inward in the vehicle width direction having the weakened portion 112, and outward deformation of the upper member 14 can be suppressed.
In the present embodiment, a weak portion 112 (notch portion 114) is provided on the inner side of the upper member 14 in the vehicle width direction and between the damper housing 100 having a higher rigidity strength than the upper member 14 and the connecting member 16. Thus, in the present embodiment, a greater difference in strength can be further generated in the weak portion 112 having a lower rigidity strength than the damper housing 100 and the coupling member 16. As a result, in the present embodiment, the upper member 14 can be prevented from bending (deforming) outward in the vehicle width direction by the weak portion 112.
In the present embodiment, the 1 st rigid rib 142 formed of the other weak portion 140 is provided on the upper member lower portion 14b as the distal end portion of the upper member 14. Thus, in the present embodiment, when the collision load is input to the upper member 14, the upper member 14 can be bent toward the vehicle rear side at an early stage with the 1 st rigid rib 142 as a starting point. Further, by providing the 1 st rigid rib 142 on the outer side of the upper member 14 in the vehicle width direction, the upper member 14 can be suppressed from being deformed outward in the vehicle width direction.
In the present embodiment, the front inner 108a and the rear inner 108b are firmly coupled (joined) by the bracket 126 covering the gap 124. Thus, in the present embodiment, when the biasing load is input to the upper member 14, the front inner 108a and the rear inner 108b can be prevented from being peeled off together from the upper member outer 110. Further, the bracket 126 can also serve as a bracket for holding the water tank, and the number of components can be reduced.
In the present embodiment, a gap 124 is formed between the front inner 108a and the rear inner 108b by the outer notch 120 of the front inner 108a and the outer notch 122 of the rear inner 108 b. This gap 124 prevents the upper member 14 from becoming larger in the present embodiment. Further, the bracket 126 can suppress a decrease in the rigidity strength due to the provision of the gap 124. In the present embodiment, by disposing the bracket 126 at the upper portion of the damper housing 100 having high rigidity and strength, damage or deformation of the bracket 126 when an offset load is input can be suppressed.
Claims (4)
1. A vehicle body front structure is characterized by comprising:
a pair of left and right front side frames extending in the vehicle front-rear direction;
a pair of left and right upper members disposed on the vehicle width direction outer sides of the front side frames and extending in the vehicle front-rear direction,
each of the upper members has: a front end portion on the vehicle front side, which is inclined outward in the vehicle width direction; and a fragile portion provided on the inner side in the vehicle width direction,
the vehicle body front structure further includes:
a pair of left and right connecting members for connecting the front side frames and the distal end portions of the upper members; and
a damper housing for fixing the damper,
the weak portion is provided between the damper housing and the coupling member.
2. The vehicle body front structure according to claim 1,
the tip end portion of each of the upper members is provided with another weak portion,
the other weak portion is located on the outside of the connecting member in the vehicle width direction.
3. The vehicle body front structure according to claim 1 or 2,
each upper member has a front inner member and a rear inner member connected to the outer member at an upper portion thereof,
and the front inner member and the rear inner member are coupled by a bracket that holds the tank.
4. The vehicle body front structure according to claim 3,
the bracket is disposed at an upper position of the shock absorber housing,
a gap is provided between the front inner member and the rear inner member at a coupling portion where the bracket is coupled to the front inner member and the rear inner member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017105165A JP6535366B2 (en) | 2017-05-29 | 2017-05-29 | Front body structure |
| JP2017-105165 | 2017-05-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108928395A CN108928395A (en) | 2018-12-04 |
| CN108928395B true CN108928395B (en) | 2020-12-04 |
Family
ID=64448735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810463710.6A Active CN108928395B (en) | 2017-05-29 | 2018-05-15 | Vehicle body front structure |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6535366B2 (en) |
| CN (1) | CN108928395B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7217414B2 (en) | 2018-10-23 | 2023-02-03 | パナソニックＩｐマネジメント株式会社 | refrigerator |
| JP7156991B2 (en) * | 2019-03-29 | 2022-10-19 | 本田技研工業株式会社 | Subframe structure |
| JP7177815B2 (en) * | 2020-12-04 | 2022-11-24 | 本田技研工業株式会社 | Body front structure |
| JP7177813B2 (en) * | 2020-12-04 | 2022-11-24 | 本田技研工業株式会社 | Body front structure |
| JP7125971B2 (en) * | 2020-12-04 | 2022-08-25 | 本田技研工業株式会社 | VEHICLE FRONT STRUCTURE AND VEHICLE FRONT MANUFACTURING METHOD |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4458051B2 (en) * | 2006-03-10 | 2010-04-28 | トヨタ自動車株式会社 | Body front structure |
| JP2012148691A (en) * | 2011-01-20 | 2012-08-09 | Honda Motor Co Ltd | Vehicle body front structure of automobile |
| US8882184B2 (en) * | 2011-02-23 | 2014-11-11 | Honda Motor Co., Ltd. | Structure for front portion of automobile body |
| JP6252080B2 (en) * | 2013-10-02 | 2017-12-27 | 日産自動車株式会社 | Auto body front structure |
| WO2015122276A1 (en) * | 2014-02-12 | 2015-08-20 | 本田技研工業株式会社 | Structure for front part of vehicle body |
-
2017
- 2017-05-29 JP JP2017105165A patent/JP6535366B2/en not_active Expired - Fee Related
-
2018
- 2018-05-15 CN CN201810463710.6A patent/CN108928395B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108928395A (en) | 2018-12-04 |
| JP2018199431A (en) | 2018-12-20 |
| JP6535366B2 (en) | 2019-06-26 |
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