CN108791509A - Car body fore part arrangement - Google Patents
Car body fore part arrangement Download PDFInfo
- Publication number
- CN108791509A CN108791509A CN201810377597.XA CN201810377597A CN108791509A CN 108791509 A CN108791509 A CN 108791509A CN 201810377597 A CN201810377597 A CN 201810377597A CN 108791509 A CN108791509 A CN 108791509A
- Authority
- CN
- China
- Prior art keywords
- subframe
- vehicle frame
- car body
- crackle
- front side
- 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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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
-
- 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
- B62D25/02—Side panels
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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
There is provided it is a kind of can by easily construct cause subframe when collision fall off and the car body fore part arrangement of the reduction of the supporting rigidity of subframe when can inhibit usual.Car body fore part arrangement has front side vehicle frame (14), front panel crossbeam (50) and the subframe (54) of pair of right and left.Front panel crossbeam (50) has the subframe mounting portion (52) of main body of cross-beam (51) and pair of right and left.Subframe mounting portion (52) has the crackle generating unit (52g) for that will the bolt (B) of subframe mounting portion (52) and subframe (54) fastening interspersed subframe fastener hole (52f) and be formed between subframe fastener hole (52f) and front side vehicle frame (14).
Description
Technical field
The present invention relates to car body fore part arrangements.
Background technology
There are many make the car body fore part arrangement that subframe falls off from vehicle body in vehicle frontal collision for exploitation.
For example, in patent document 1, disclosing and being fastened subframe and passage rack (tunnel frame) admittedly by bolt
Determine and the pin being located on subframe is interspersed in the invention in the trepanning worn on passage rack.It will be between bolt hole and bolt
Gap be set to it is bigger than the gap between pin and trepanning.According to the invention of patent document 1, in head-on crash, sell trepanning
It expands, thus reduces the supporting rigidity around bolt hole, then bolt expands bolt hole, and thus bolt and nut fall off,
And subframe can be made to fall off from passage rack.
In addition, in patent document 2, disclosing and subframe and front side vehicle frame being fastened and fixed and in front side by bolt
The invention of incised notch is formed on the edge of the bolt hole of vehicle frame.According to the invention of patent document 2, in head-on crash from the top of incised notch
It cracks, bolt hole expands, and thus bolt and nut fall off, and subframe can be made to fall off from front side vehicle frame.
Existing technical literature
Patent document
Patent document 1：No. 5471559 bulletins of Japanese Patent No.
Patent document 2：No. 5278105 bulletins of Japanese Patent No.
Invention content
In the invention of patent document 1, it is difficult into marketing and the design of the positional precision of bolt hole, management.In addition, due to
To the high intensity for the degree that pin seeks that trepanning is made to expand, so with the problem of cost increases additive weight increase can be incurred.
In the invention of patent document 2, due to being formed with incised notch on the edge of bolt hole, so secondary vehicle when having usual
The problem of supporting rigidity of frame reduces.
The present invention is researched and developed for such viewpoint, project be to provide one kind can by easily construct come
Cause the vehicle foreside of the reduction of the supporting rigidity of subframe when falling off and can inhibit usual of subframe when collision
Construction.
In order to solve the above problems, the present invention has：The front side vehicle frame of the pair of right and left extended along vehicle front-rear direction；Edge
Vehicle width direction extends and by a pair of above-mentioned front side vehicle frame front panel crossbeam (dash cross member) connected to each other；With with
It sets in the lower section of above-mentioned front side vehicle frame and configures the subframe in front relative to above-mentioned front panel crossbeam.Above-mentioned front panel is horizontal
Beam has：Main body of cross-beam；And by the outside of the vehicle width direction of above-mentioned main body of cross-beam end and above-mentioned front side vehicle frame connection a left side
The subframe mounting portion of right a pair.Above-mentioned subframe mounting portion has：For the subframe mounting portion and above-mentioned subframe are fastened
The interspersed subframe fastener hole of secure component；And it is formed between above-mentioned subframe fastener hole and above-mentioned front side vehicle frame at least
One crackle generating unit.
Invention effect
Car body fore part arrangement according to the present invention can cause the de- of subframe when collision by easily constructing
The reduction of the supporting rigidity of subframe when falling, and can inhibit usual.
Description of the drawings
Fig. 1 is the upward view of the vehicle for the car body fore part arrangement for being applicable in embodiments of the present invention.
Fig. 2 is the II-II line sectional views of Fig. 1.
Fig. 3 is the III-III line sectional views of Fig. 1.
Fig. 4 is the enlarged cross-sectional view for the subframe mounting portion for indicating Fig. 3.
Fig. 5 is the V-V line sectional views of Fig. 1.
Fig. 6 is the amplification inclinating view for indicating subframe mounting portion.
Fig. 7 is the VII-VII line cross-sectional perspective views of Fig. 1.
Fig. 8 is indicated when head-on crash has occurred in the vehicle for the car body fore part arrangement for being applicable in embodiments of the present invention
The upward view of state.
Fig. 9 is the amplification inclinating view for the state for indicating subframe mounting portion when head-on crash has occurred in vehicle, Fig. 9's
(a) show that crackle marches to the state of subframe fastener hole from crackle generating unit, (b) of Fig. 9 shows crackle from crackle generating unit
March to the state of crackle expansion section.
Figure 10 is the sectional view for the state for indicating subframe and subframe mounting portion when head-on crash has occurred in vehicle, figure
10 (a) shows that the state that subframe fastener hole has expanded, (b) of Figure 10 show that bolt and nut fall off from subframe fastener hole
State afterwards.
Reference sign
10 vehicles (car body fore part arrangement)
14 front side vehicle frames
24 side main body of vehicle frame
24a supporting parts
24b rakes
26 outer vehicle frames
Vehicle frame in 28
30 branches
40 outriggers
50 front panel crossbeams
51 main body of cross-beam
52 subframe mounting portions
52f subframe fastener holes
52g crackle generating units
52h crackles expansion section
The first sliding surfaces of 52j
54 subframes
The second sliding surfaces of 55a
57 partition boards
58 preceding fastening parts
Fastening part after 59
59b collars
60 mounting brackets
64 stabilizers
P branch points
B bolts (secure component)
N nuts
Specific implementation mode
Next, explaining embodiments of the present invention in detail while suitably referring to attached drawing.In addition, in the various figures,
" front and back " expression vehicle front-rear direction, " left and right " indicate vehicle width direction (left and right directions), " upper and lower " expression vertical upper and lower directions.
As shown in Figure 1, the vehicle 10 for being applicable in the car body fore part arrangement of embodiments of the present invention has by bearing-type vehicle
The vehicle body 12 that body (monocoque body) is constituted.The vehicle body 12 is relative to the vehicle width direction from vehicle 10 centrally through simultaneously edge
It the center line (not shown) of vehicle front-rear direction extension and is arranged bilaterally symmetrically.
Vehicle body 12 mainly the front side vehicle frame 14 with pair of right and left, 14, front panel crossbeam 50 and subframe 54.
The front side vehicle frame 14,14 of pair of right and left is extended positioned at the left and right sides of vehicle foreside and along vehicle front-rear direction
Made of metal component.Each front side vehicle frame 14 has side main body of vehicle frame 24, outer vehicle frame 26 and interior vehicle frame 28.Outer vehicle frame 26 and interior vehicle frame
28 are arranged in a manner of distinguishing branch from the branch point P of the branch 30 positioned at the rear of vehicle of each front side vehicle frame 14.In outer vehicle
Lower longeron 16,16 configured with the pair of right and left extended along vehicle front-rear direction on the outside of the vehicle width direction of frame 26.In pair of right and left
Lower longeron 16,16 between be configured with bottom panel 19.
Outer vehicle frame 26 and interior vehicle frame 28 are in section cap shaped (about outer vehicle frame 26, with reference to Fig. 3) respectively, and end flange is opposite
It is fixed for example, by welding etc. in the lower surface of bottom panel 19.Outer vehicle frame 26 is from the branch point P of branch 30 towards vehicle width
The outside inclined direction branch in direction, rear end are fixed on lower longeron 16.On the other hand, interior vehicle frame 28 is from branch 30
For branch point P towards the inside inclined direction branch of vehicle width direction, rear end is fixed on front chair bearing cross beam 18.
Side main body of vehicle frame 24 is located at vehicle front compared with the branch point P of branch 30, and to extend towards vehicle front
Mode be arranged.About side main body of vehicle frame 24, will be explained in later.
It is provided with the bumper extended along vehicle width direction between the front of the car of the front side vehicle frame 14,14 of pair of right and left
Crossbeam 34.In addition, pair of right and left front side vehicle frame 14,14 along between vehicle width direction configured with divide power carry room 66
With the front panel 36 of cabin.It is configured in power carries room 66 and includes the power unit U including engine and gearbox etc..?
The front of front panel 36 and both sides along vehicle width direction, the left and right configured with the damper upper end for supporting left and right (not shown)
Damper pedestal 37,37.
Across the both sides as outer vehicle frame 26 and the vehicle width direction of the branch 30 of the branch point P of interior vehicle frame 28, difference
Front panel crossbeam between outrigger 40,40 and the outrigger 40,40 for being folded in pair of right and left configured with pair of right and left
50.In other words, the outrigger 40,40 and front panel crossbeam 50 of pair of right and left across a pair of of front side vehicle frame 14,14 ground along vehicle
Wide direction is configured in substantially linear.In addition, attached on binding site of the outrigger 40,40 with branch 30 of pair of right and left
Equipped with reinforcement cover 43.
Subframe 54 is the made of metal component extended along vehicle width direction and vehicle front-rear direction.Subframe 54 is configured in front side
The lower section of vehicle frame 14, and configured in front relative to front panel crossbeam 50.Subframe 54 has：Subframe upper member 55
(with reference to Fig. 4), subframe lower member 56, the partition board 57 of pair of right and left, 57, the preceding fastening part 58,58 of pair of right and left and left and right one
To rear fastening part 59,59.Subframe upper member 55 and subframe lower member 56 are interconnected by welding etc..Partition board 57 is set
It sets between subframe upper member 55 and subframe lower member 56, extends along vehicle front-rear direction.
A pair of preceding fastening part 58,58 is the position for subframe 54 to be fastened and fixed to front side vehicle frame 14.Preceding fastening part
58,58 it is located at front position at the both ends of the vehicle width direction of subframe 54.Preceding fastening part 58 is towards front side vehicle frame 14 and to vehicle
Outside and top extension.Preceding fastening part 58 has bolt hole 58a.Preceding fastening part 58 is solid by fastening by bolt (illustration omitted)
Due to front side vehicle frame 14.
Fastening part 59,59 is the position for subframe 54 to be fastened and fixed to front panel crossbeam 50 after a pair.After fasten
Portion 59,59 is located at rear position at the both ends of the vehicle width direction of subframe 54.Afterwards fastening part 59 towards front panel crossbeam 50 and
Rearward extend.Fastening part 59 has bolt hole 59a afterwards.Fastening part 59 is fastened on by bolt (illustration omitted) afterwards
With branch 30 adjacent or near to subframe mounting portion 52.
Front panel crossbeam 50 is extended along the width of the car and by the made of metal portion connected to each other of vehicle frame 14,14 on front side of a pair
Part.Front panel crossbeam 50 has：Configure 51 (hereinafter also referred to " main body of cross-beam of front panel main body of cross-beam central in the direction of vehicle width
51) and by the subframe for the pair of right and left that the end on the outside of the vehicle width direction of main body of cross-beam 51 links with front side vehicle frame 14,14 pacify
Dress portion 52,52.
Main body of cross-beam 51 shown in Fig. 2 is in groove-like (cap shaped) under side, sectional, to vehicle width direction both sides and top
Opening.Main body of cross-beam 51 is configured to include body floor 51a, main body front surface 51b and main body rear surface 51c.
Body floor 51a is along the plate position that vehicle front-rear direction and vehicle width direction extend.Body floor shown in Fig. 3
51a is when from vehicle front-rear direction in arch shape outstanding upward.Therefore, with before the continuous main bodys of body floor 51a
It is then more gradual towards center side that the height dimension of surface 51b and main body rear surface 51c are formed as the outside from vehicle width direction
It reduces.It is formed with main body outward flange 51d, 51d at the both ends of the vehicle width direction of body floor 51a.In the upper of main body of cross-beam 51
Side is configured with bottom panel 19.In the upper surface of bottom panel 19, it is fixed with the two of section cap shaped at spaced intervals along vehicle width direction
A mounting bracket 60,60.Mounting bracket 60 (such as is turned to for installing car body component in the vehicle width direction center of bottom panel 19
Hanger (steering hanger) etc.) component.The top (vehicle width direction central portion) of body floor 51a is in flat condition, via
Bottom panel 19 is simultaneously engaged by welding with mounting bracket 60.
As shown in Fig. 2, main body front surface 51b is the plate position from the front end of body floor 51a to tiltedly upper front extension.
The main body front flange 51e for being formed through welding in the upper end of main body front surface 51b and being engaged with the lower surface of front panel 36.
Main body rear surface 51c is the plate position extended from the rear end of body floor 51a to oblique upper rear.The table after main body
The upper end of face 51c is formed through the main body rear flange 51f for welding and being engaged with the lower surface of bottom panel 19.
Subframe mounting portion 52 shown in fig. 5 is in groove-like (cap shaped) under side, sectional, to vehicle width direction both sides and
Upper opening.Subframe mounting portion 52 is configured to comprising installation bottom surface 52a, installation front surface 52b and installation rear surface 52c.
Installation bottom surface 52a is along the plate position that vehicle front-rear direction and vehicle width direction extend.Installation bottom shown in Fig. 4
End on the inside of the vehicle width direction of face 52a is formed with the installation inward flange 52d engaged with main body outward flange 51d.In installation bottom surface
End on the outside of the vehicle width direction of 52a is formed with the installation outward flange 52e engaged with the lower surface of interior vehicle frame 28.
As shown in fig. 6, subframe mounting portion 52 has subframe fastener hole 52f, crackle generating unit in installing bottom surface 52a
52g and crackle expansion section 52h.In addition, in figure 6, describing subframe 54 by double dot dash line, and omit bolt and retouched
It paints.
Subframe fastener hole 52f is that the bolt B for fastening subframe mounting portion 52 and subframe 54 is interspersed (with reference to Fig. 5)
Position.Subframe fastener hole 52f is constituted by that will install bottom surface 52a through holes perforative along the vertical direction.In installation bottom surface 52a
Upside by being welded with the nut N being connected to subframe fastener hole 52f.Subframe fastener hole 52f is from bottom surface
When it is in rounded shape.Reference numeral W in Fig. 6 schematically illustrates the weld part that nut N is fixed on to installation bottom surface 52a.Weld part W
It is formed in a manner of around subframe fastener hole 52f multiple (being in the present embodiment three).By three weld part W
Central link imaginary line L1 when from bottom surface be in positive triangle shape.The quantity and configuration of weld part W can also be appropriate
Change.The welding breaking load of nut N is set to the plate cut-out load (fracture than subframe mounting portion 52 in the present embodiment
Load) it is big.That is, first generated than the welding breaking of nut N with the crackle of the subframe mounting portion 52 in head-on crash
Mode sets the configuration etc. of the plate thickness and subframe fastener hole 52f and crackle generating unit 52g of subframe mounting portion 52.
Crackle generating unit 52g is the position of the generation starting point as crackle in head-on crash.As long as crackle generating unit 52g
It can crack, be not particularly limited, in the present embodiment by that will install on installation bottom surface 52a in head-on crash
52a through holes perforative along the vertical direction in bottom surface are constituted.Crackle generating unit 52g is in rounded shape when from bottom surface.Crackle produces
The diameter of life portion 52g forms smaller than subframe fastener hole 52f.The quantity of crackle generating unit 52g is not particularly limited, in this reality
It applies there are one being formed in mode.Crackle generating unit 52g is formed in subframe fastener hole 52f and (the installation outward flange of front side vehicle frame 14
Between 52e).It is that in head-on crash, shearing force is concentrated as described later between subframe fastener hole 52f and front side vehicle frame 14
Position.In the following description, which is also referred to as " shearing force concentrates position S ".52g is relative to subframe for crackle generating unit
Fastener hole 52f and be formed at spaced intervals on the outside of vehicle and rear.
Crackle expansion section 52h is the widened position of crackle for making to generate as starting point using crackle generating unit 52g.Crackle
Expansion section 52h as long as expanded crack as long as that can be not particularly limited, in the present embodiment by that will install the vertically sides bottom surface 52a
It is constituted to perforative through hole.Crackle expansion section 52h is in rounded shape when from bottom surface.The diameter shape of crackle expansion section 52h
It is smaller than subframe fastener hole 52f at obtaining.The quantity of crackle expansion section 52h is not particularly limited, and is formed in the present embodiment
One.Crackle expansion section 52h configures the opposite side across subframe fastener hole 52f in crackle generating unit 52g.Crackle expansion section
52h forms side in the car and rear at spaced intervals relative to subframe fastener hole 52f.That is, subframe fastener hole
52f is configured relative to crackle generating unit 52g and crackle expansion section 52h in front.By the center of crackle generating unit 52g and crackle
The center of expansion section 52h relative to the central link of subframe fastener hole 52f imaginary line L2 in substantially V words outstanding forwards
Shape.
As shown in figure 5, installation front surface 52b is the plate position extended from the front end of installation bottom surface 52a to oblique upper front.
The upper end of surface 52b in a pre-installation is formed with the installation front flange 52i engaged with the lower surface of front panel 36.Table in a pre-installation
The lower side of face 52b is formed with compared with upper side gently inclined first sliding surface 52j.First sliding surface 52j and secondary vehicle
Frame fastener hole 52f is compared in front of being formed in.First sliding surface 52j more tends to rear then more tilts down.In subframe upper member
Being formed on 55 in head-on crash can be with the second sliding surface 55a of the first sliding surface 52j sliding contacts.Second sliding surface
55a is formed in front compared with rear fastening part 59.Second sliding surface 55a more tends to rear then more tilts down.On subframe
The upper surface of component 55 is provided with stabilizer 64 by the mounting bracket 62 of section hat shape.Stabilizer 64 is in along vehicle width direction
The cylindrical shape of extension.
Installation rear surface 52c is the plate position extended from the rear end of installation bottom surface 52a to oblique upper rear.Table after mounting
The upper end of face 52c is formed with the installation rear flange 52k engaged with the lower surface of bottom panel 19.
Illustrate the fixture construction of subframe 54, partition board 57 and subframe mounting portion 52 in detail below.
The rear fastening part 59 of subframe 54 be for bolt B intert position, be configured to comprising upper and lower two bolt hole 59a,
59a and collar (collar) 59b.Bolt hole 59a, 59a are in rounded shape when from bottom surface.The bolt hole 59a of upside will be secondary
Vehicle frame upper member 55 runs through along the vertical direction, and the bolt hole 59a of downside runs through subframe lower member 56 along the vertical direction.Two
Bolt hole 59a, 59a are spaced at intervals along the vertical direction.Collar 59b is cylindrical, setting two bolts hole 59a, 59a it
Between.
Partition board 57 is the metal plate-shaped member for reinforcing subframe 54.Partition board 57 is in section U-shaped.In partition board
The rear position of 57 upper wall is formed with bolt hole 57a.Bolt hole 57a is in rounded shape when from bottom surface.Bolt hole 57a matches
It sets between the bolt hole 59a and collar 59b of upside.Partition board 57 links by bolt B with collar 59b.Partition board 57 is from collar
59b extends towards front.
Three bolt hole 59a, 59a, 57a, collar 59b and subframe fastener hole 52f are interconnected.Bolt hole 59a,
In 59a, 57a, collar 59b and subframe fastener hole 52f, bolt B is interspersed with from downside.The front end side of bolt B and it is fixed on pair
Nut N on the upside of vehicle frame fastener hole 52f screws togather, thus these three component quilts of subframe 54, partition board 57 and subframe mounting portion 52
Integrally it is fastened and fixed.
Side main body of vehicle frame 24 is described in detail referring next to Fig. 7.
Side main body of vehicle frame 24 is configured to include supporting part 24a and rake 24b.Supporting part 24a is along vehicle front-rear direction
The position substantially horizontally extended.It hangs down on supporting part 24a and is provided with front side frame sides fastening part 24c.Before subframe 54
Fastening part 58 (referring to Fig.1) is fastened and fixed to front side frame sides fastening part 24c by bolt (illustration omitted).In addition, preceding tight
Gu portion 58 can also be fastened and fixed to rake 24b.
Rake 24b is continuous with the rear end of supporting part 24a and along the inclination of front panel 36 and more tending to rear then
The position tilted down.Rake 24b is engaged by welding with front panel 36.
The vehicle 10 for being applicable in the car body fore part arrangement of present embodiment is substantially constituted as described above.Referring next to
Fig. 8 to Figure 10 illustrates its function and effect.
As shown in figure 8, in the case where head-on crash has occurred in the vehicle 10 of present embodiment, front side vehicle frame 14 is due to just
Face collision load F and flexural deformation.By the deformation, the supporting part 24a of front side vehicle frame 14 and the preceding fastening part 58 of subframe 54
Between fixed disengage.
In addition, in the case where head-on crash has occurred in vehicle 10, the power units such as engine, gearbox U (referring to Fig.1)
It rearward moves, subframe 54 is rearward pushed by power unit U.When subframe 54 is rearward pushed, such as
Shown in (a) of Fig. 9, bolt B rearward pushes the hole wall of subframe fastener hole 52f and nut N, therefore subframe 54 and front wall
Plate crossbeam 50 is rearward relatively moved relative to front side vehicle frame 14 (with reference to the arrow Y1 of (a) of Fig. 9).
At this point, just linked the front side vehicle frame 14 of pair of right and left by front panel crossbeam 50, therefore, because will rearward phase
Phase difference (the ginseng of direction of travel between mobile front panel crossbeam 50 and the front side vehicle frame 14 relatively to advance forwards
According to arrow Y1, the Y2 of (a) of Fig. 9), shearing force concentrates between subframe fastener hole 52f and front side vehicle frame 14.
In the present embodiment, due to concentrating S formation in position to have crackle generating unit 52g in shearing force, so being produced with crackle
Life portion 52g is that starting point cracks C.Crackle C to vehicle width direction inner row and then reaches subframe fastening from crackle generating unit 52g
Hole 52f.As shown in (b) of Fig. 9, crackle C further to vehicle width direction inner row and then reaches crackle from subframe fastener hole 52f
Expansion section 52h.Installation bottom surface 52a is connected with crackle generating unit 52g, subframe fastener hole 52f with crackle expansion section 52h as a result,
Mode be broken, nut N to downside expose.
When the fracture for installing bottom surface 52a is advanced further, as shown in (a) (b) of Figure 10, bolt B and nut N from comprising
The fracture location of subframe fastener hole 52f falls off, and subframe 54 falls off from vehicle body 12.At this point, in the present embodiment, subframe
54 the second sliding surface 55a and the first sliding surface 52j sliding contacts of subframe mounting portion 52, therefore subframe 54 is easy to falling
Enter the direction movement below bottom plate.Bolt B and nut N fall off from fracture location as a result, and then subframe 54 is easy from vehicle body 12
It falls off.
In addition, as shown in figure 8, being input into the head-on crash load F of the front end of front side vehicle frame 14 from point of branch 30
Fulcrum P branches and transmitted as load F1 relative to outer vehicle frame 26.On the other hand, points of the head-on crash load F from branch 30
Fulcrum P branches and transmitted as load F2 relative to interior vehicle frame 28.In addition, branch point Ps of the head-on crash load F from branch 30
Branch and transmitted as load F3 relative to outrigger 40.Moreover, branch points P point of the head-on crash load F from branch 30
It props up and is transmitted as load F4 relative to front panel crossbeam 50.Like this, it is input into the head-on crash load F of front side vehicle frame 14
It is dispersed into load F1~F4 relative to this four vehicle frames of interior vehicle frame 28, outer vehicle frame 26, outrigger 40 and front panel crossbeam 50
It transmits on ground.
Present embodiment from the description above, as shown in fig. 6, crackle generating unit 52g is formed in subframe fastener hole
Shearing force between 52f and front side vehicle frame 14 concentrates position S.Therefore, it is possible to make crackle C march to pair from crackle generating unit 52g
Vehicle frame fastener hole 52f.Bolt B falls off from subframe fastener hole 52f as a result, and subframe 54 can be made to fall off, and then can press down
Interference between the front panel 36 of subframe 54 processed and configuration in its rear.I.e. it is capable to be drawn by easily constructing
Send out falling off for the subframe 54 when colliding.In addition, due to being separately formed crackle generating unit 52g with subframe fastener hole 52f, and
The processing such as incised notch are not carried out to subframe fastener hole 52f itself, so the supporting rigidity of the subframe 54 when can inhibit usual
Reduction.
In addition, according to the present embodiment, as shown in fig. 6, being welded and fixed on the installation bottom surface 52a of subframe mounting portion 52
There is a nut N, the welding breaking load of nut N is set to bigger than the plate of subframe mounting portion 52 cut-out load.As a result, with nut N
Welding breaking compare, first from the nut N periphery of subframe mounting portion 52 crack C, and steadily subframe can be made to pacify
Dress portion 52 is broken.
In addition, according to the present embodiment, as shown in fig. 6, subframe mounting portion 52 in crackle generating unit 52g across secondary vehicle
The opposite side of frame fastener hole 52f has crackle expansion section 52h.Crackle C is easy to advance as a result, therefore can easily make secondary vehicle
Frame mounting portion 52 is broken, and then so that subframe 54 is fallen off.
In addition, according to the present embodiment, as shown in fig. 6, subframe fastener hole 52f is relative to crackle generating unit 52g and splits
Line expansion section 52h and configure in front, crackle generating unit 52g and crackle expansion section 52h is connected relative to subframe fastener hole 52f
The imaginary line L2 of knot is in substantially V-like shape outstanding forwards.The subframe generated as a result, due to the phase difference of direction of travel
The crackle C of mounting portion 52 is advanced in a manner of being bypassed from subframe fastener hole 52f, therefore can easily make subframe mounting portion
52 fractures, and then so that subframe 54 is fallen off.
In addition, according to the present embodiment, more tending to rear as shown in figure 5, subframe mounting portion 52 has then more dipping down
The first oblique sliding surface 52j, subframe 54, which has, more to be tended to rear then more tilts down and can be slided with the first sliding surface 52j
Second sliding surface 55a of contact.The second sliding surface 55a of subframe 54 and subframe mounting portion 52 in head-on crash as a result,
The first sliding surface 52j sliding contacts, therefore subframe 54 is easy to move to the direction that falls into below bottom plate, and then can be easy
Ground makes subframe 54 fall off.
In addition, according to the present embodiment, as depicted in figs. 3 and 5, the upper surface of subframe 54 is provided with stabilizer 64,
The body floor 51a of main body of cross-beam 51 is in arch shape outstanding upward.It is de- from subframe mounting portion 52 in subframe 54 as a result,
It when falling and further rearward moving, can inhibit that the stabilizer 64 and main body of cross-beam 51 in the upper surface of subframe 54 is arranged
Between interference.Therefore, the mobile change of subframe 54 rearward is smooth, and the traveling of crackle C becomes smooth.
If it is arch shape to make the body floor 51a of main body of cross-beam 51, since area of section is reduced, so intensity and rigidity
It is possible that can reduce.But according to the present embodiment, as shown in figure 3, main body of cross-beam 51 via bottom panel 19 and in bottom panel
The mounting bracket 60 of 19 vehicle width direction center installation car body component engages, therefore being capable of inhibition strength and rigid reduction.
In addition, according to the present embodiment, as shown in figure 8, front side vehicle frame 14 has from positioned at the rear end of side main body of vehicle frame 24
Branch point P branches outer vehicle frame 26 and interior vehicle frame 28, across the branch as outer vehicle frame 26 and the branch point P of interior vehicle frame 28
The both sides of the vehicle width direction in portion 30 are respectively in connection with having outrigger 40 and front panel crossbeam 50.It is applied to front side vehicle frame 14 as a result,
Collision load relative to this four frames of interior vehicle frame 28, outer vehicle frame 26, outrigger 40 and front panel crossbeam 50 and dispersedly
It transmits, therefore in addition to whole plane (full flat) collides, even the collision that the such input load of offset collisions is big,
It can inhibit the deformation of bottom panel 19.
In addition, according to the present embodiment, as shown in Figure 1, the both ends of the vehicle width direction in subframe 54, front position is solid
Due to supporting part 24a, at the both ends of the vehicle width direction of subframe 54, rear position is fixed on and as outer vehicle frame 26 and interior vehicle
The branch 30 of the branch point P of frame 28 adjacent or near to subframe mounting portion 52.Therefore, when the supporting part in head-on crash
24a and rake 24b warpages and when being disengaged with the front position of subframe 54 fixed, subframe 54 is rearward pushed.By
This, can easily be such that subframe mounting portion 52 is broken, and then so that subframe 54 is fallen off.
In addition, according to the present embodiment, as shown in figure 5, subframe 54 have the collar 59b interted for bolt B and by
Bolt B and with the partition board 57 collar 59b connection and extend from collar 59b towards front.It is easy to pass through in head-on crash as a result,
Partition board 57 assigns load to bolt B, therefore subframe mounting portion 52 can more easily be made to be broken, and then can be more prone to
Ground makes subframe 54 fall off.
More than, be described in detail by reference to the accompanying drawing embodiments of the present invention, but the present invention is not limited to this, Neng Gou
It does not depart from and suitably changes in the range of the purport of invention.
In the present embodiment, crackle generating unit 52g and crackle expansion section 52h are constituted by through hole, but the present invention is simultaneously
It is not limited to this, such as may be thinner wall section, slit, incised notch etc..In the present embodiment, make subframe fastener hole 52f, split
Line generating unit 52g and crackle expansion section 52h is the configuration of substantially V-like shape outstanding forwards, but for example or along
The configuration that vehicle width direction linearly arranges.In the present embodiment, body floor 51a is formed as into arch outstanding upward
Shape, but for example can also be formed as linear along vehicle width direction.
Claims (10)
1. a kind of car body fore part arrangement, which is characterized in that have：
The front side vehicle frame of the pair of right and left extended along vehicle front-rear direction；
It is extended along the width of the car and by a pair of front side vehicle frame front panel crossbeam connected to each other；With
Configuration configures the subframe in front in the lower section of the front side vehicle frame and relative to the front panel crossbeam,
The front panel crossbeam has：
Main body of cross-beam；With
By the subframe peace of the pair of right and left of end and front side vehicle frame connection on the outside of the vehicle width direction of the main body of cross-beam
Dress portion,
The subframe mounting portion has：
For the subframe fastener hole for interting the secure component of the subframe mounting portion and subframe fastening；With
At least one crackle generating unit being formed between the subframe fastener hole and the front side vehicle frame.
2. car body fore part arrangement as described in claim 1, which is characterized in that
It is welded with nut on the bottom surface of the subframe mounting portion,
The welding breaking load of the nut is set to bigger than the plate of subframe mounting portion cut-out load.
3. car body fore part arrangement as claimed in claim 1 or 2, which is characterized in that
The subframe mounting portion expands in the opposite side across the subframe fastener hole of the crackle generating unit with crackle
Big portion.
4. car body fore part arrangement as claimed in claim 3, which is characterized in that
The subframe fastener hole is configured relative to the crackle generating unit and the crackle expansion section in front,
The imaginary line that the crackle generating unit and the crackle expansion section are linked relative to the subframe fastener hole is in forward
Side's substantially V-like shape outstanding.
5. car body fore part arrangement according to any one of claims 1 to 4, which is characterized in that
The subframe mounting portion is then more downward with being formed in front compared with the subframe fastener hole and more tending to rear
Inclined first sliding surface,
The subframe has：The rear fastening part interted for the secure component；Before being formed in compared with the rear fastening part
Side and more tends to rear then more tilt down and can be with the second sliding surface of the first sliding surface sliding contact.
6. the car body fore part arrangement as described in any one of claim 1 to 5, which is characterized in that
With the stabilizer being arranged in the upper surface of the subframe,
The bottom surface of the main body of cross-beam is in arch shape outstanding upward.
7. car body fore part arrangement as claimed in claim 6, which is characterized in that have：
Bottom panel above is configured relative to the main body of cross-beam；With
It is fixed on the upper surface of the bottom panel and the peace for installing car body component in the vehicle width direction center of the bottom panel
Bracket is filled,
The main body of cross-beam is engaged via the bottom panel with the mounting bracket.
8. the car body fore part arrangement as described in any one of claim 1 to 7, which is characterized in that
The front side vehicle frame has front side main body of vehicle frame and from the branch point branch positioned at the rear end of the front side main body of vehicle frame
Outer vehicle frame and interior vehicle frame,
Across the both sides of the vehicle width direction as the outer vehicle frame and the branch of the branch point of the interior vehicle frame, difference
It is combined with outrigger and the front panel crossbeam.
9. the car body fore part arrangement as described in any one of claim 1 to 7, which is characterized in that
The front side vehicle frame has：
The supporting part extended along vehicle front-rear direction；
Inclination that is continuous with the rear end of the supporting part and being tilted down more tending to rear then along the inclination of front panel
Portion；With
Outer vehicle frame from the branch point branch positioned at the rear end of the rake and interior vehicle frame,
The supporting part or the rake are fixed in the front position of the subframe,
The rear position of the subframe is fixed on and the branch as the outer vehicle frame and the branch point of the interior vehicle frame
The adjacent front panel crossbeam in portion.
10. car body fore part arrangement as claimed in any one of claims 1-9 wherein, which is characterized in that
The subframe has for the interspersed collar of the secure component and links with the collar by the secure component
And the partition board extended from the collar towards front.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-087239 | 2017-04-26 | ||
| JP2017087239A JP6469753B2 (en) | 2017-04-26 | 2017-04-26 | Body front structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108791509A true CN108791509A (en) | 2018-11-13 |
| CN108791509B CN108791509B (en) | 2020-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810377597.XA Active CN108791509B (en) | 2017-04-26 | 2018-04-25 | Vehicle body front structure |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6469753B2 (en) |
| CN (1) | CN108791509B (en) |
Cited By (4)
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| CN111746648A (en) * | 2019-03-29 | 2020-10-09 | 株式会社 F.泰克 | Subframe for vehicle |
| CN112918571A (en) * | 2019-12-05 | 2021-06-08 | 现代自动车株式会社 | Vehicle body |
| CN113498395A (en) * | 2019-03-08 | 2021-10-12 | 日本制铁株式会社 | Vehicle body lower structure |
| CN114670930A (en) * | 2020-12-24 | 2022-06-28 | 本田技研工业株式会社 | Vehicle body front structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20210158681A (en) | 2020-06-24 | 2021-12-31 | 현대자동차주식회사 | Vehicle front structure |
| JP7497674B2 (en) * | 2020-11-17 | 2024-06-11 | マツダ株式会社 | Vehicle front body structure |
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| CN112918571B (en) * | 2019-12-05 | 2024-04-30 | 现代自动车株式会社 | Vehicle body |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108791509B (en) | 2020-12-22 |
| JP6469753B2 (en) | 2019-02-13 |
| JP2018184089A (en) | 2018-11-22 |
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