CN109204512A - The reinforcement structure at front longitudinal beam rear portion - Google Patents
The reinforcement structure at front longitudinal beam rear portion Download PDFInfo
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- CN109204512A CN109204512A CN201710515800.0A CN201710515800A CN109204512A CN 109204512 A CN109204512 A CN 109204512A CN 201710515800 A CN201710515800 A CN 201710515800A CN 109204512 A CN109204512 A CN 109204512A
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- Prior art keywords
- longitudinal beam
- front longitudinal
- rear portion
- beam rear
- car
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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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The present invention provides a kind of reinforcement structure at front longitudinal beam rear portion, is reliably prevented from front longitudinal beam rear portion by impact failure.The reinforcement structure at front longitudinal beam rear portion includes front longitudinal beam (16) and the external reinforcing plate for car (30) affixed with front longitudinal beam rear portion (28), front longitudinal beam rear portion is in U-shape along the section of vehicle width direction, by bottom wall (28a), the inner sidewall (28c) extended upwards from the inner end of bottom wall, the lateral wall (28b) extended upwards from the outboard end of bottom wall, medial flange made of bending edge from the upper end of inner sidewall (28e), outboard flanges made of bending edge from the upper end of lateral wall (28d) composition, external reinforcing plate for car is located in medial flange and outboard flanges in a manner of being near linear at least until the position corresponding with the other end of the vehicle width direction of bottom wall of one end of the vehicle width direction of external reinforcing plate for car to external reinforcing plate for car in the section along vehicle width direction.
Description
Technical field
The present invention relates to automotive body structure more particularly to the reinforcement structures at front longitudinal beam rear portion.
Background technique
It is well known that the front longitudinal beam for being located at the left and right of vehicle foreside is responsible for main energy-absorbing function in head-on crash etc.,
And the still primary structure of driver's cabin resistance to deformation.In general, energy-absorbing function is carry by the front of front longitudinal beam, and after front longitudinal beam
Portion is due to close to driver's cabin, it is therefore desirable to which the resistance to deformation when head-on crash and offset collision etc. occurs is reduced in collision process
To the intrusion volume of driver's cabin, to protect the personal safety of driver and occupant.
Patent Document 1 discloses a kind of front deck stringer rear section structures, which includes that section is equal
For U-shaped and stringer back segment 11, the first stiffening plate 12 and the second stiffening plate 13 that yield strength is successively successively decreased, the stringer back segment 11
In the lower section of front panel 21, which is equipped with bent area 16 with the front panel 21 at the position of corresponding occupant foot,
The first cavity 15 is formed between the stringer back segment 11 and the front panel 21, first stiffening plate 12 and second stiffening plate 13 are along this
The length direction of stringer back segment 11 is located at the bent area 16 and is stacked from the bottom to top in first cavity 15, by first sky
The part of the corresponding bent area 16 of chamber 15 is separated into the second cavity 152, third cavity 153 and the 4th cavity 154 from the bottom to top.It is logical
The reasonable cooperation between the transition of material rate and the transition of resistance to deformation cavity is crossed, it is vertical can effectively and consistently to complete front deck
The absorption and transmitting of beam rear section structure collision energy.
In addition, the reinforcement structure includes: to be connected in Patent Document 2 discloses a kind of reinforcement structure of automobile longitudinal girder
Side rail 22 on girder plate 21, is equipped with bar shaped stiffening plate 3 in the cavity of side rail 22, stiffening plate 3 be in U-shape be packed into it is vertical
Beam inner panel 22, the upward bending in two sides are simultaneously welded with side rail 22 and are fixedly connected with, and thus rail inner is separated by stiffening plate
Multiple enclosed areas improve the bending resistance of stringer, and stiffening plate and side rail are at U-shaped, and pad is located at stiffening plate
Supporting surface top, convenient welding.
Existing technical literature
Patent document
Patent document 1:CN204415518U
Patent document 2:CN201882151U
Summary of the invention
However, the inventors of the present application found that in the front deck stringer rear section structure of above patent document 1, due to second plus
Strong plate 13 is in U-shape, and the flange welding of U-shaped flange and front longitudinal beam, when vehicle collides, suffered impact force opens front longitudinal beam
Mouth opens, and deforms, such deformation can feed through to driver's cabin, jeopardize the personal safety of driver and occupant.
In addition, being packed into preceding indulge since stiffening plate 3 is in U-shape in the reinforcement structure of the automobile longitudinal girder of above patent document 2
Beam is welded with the inner wall of front longitudinal beam and is connected, therefore when vehicle collides, suffered impact force can make front longitudinal beam opening
It opens, deforms.This is because opening force direction (left and right) and welding direction (left and right) is unanimously, stiffening plate is easily and in front longitudinal beam
Wall separates, and can not play the role of limiting front longitudinal beam opening opening.
The present invention is to make in view of above-mentioned the problems of the prior art by sharp study, it is intended that providing
A kind of reinforcement structure for being reliably prevented from front longitudinal beam rear portion and suffering the front longitudinal beam rear portion of impact failure.
To achieve the goals above, the first technical solution of the invention provides a kind of reinforcement structure at front longitudinal beam rear portion, packet
Front longitudinal beam and the external reinforcing plate for car affixed with the rear portion of the front longitudinal beam are included, the rear portion of the front longitudinal beam is in along the section of vehicle width direction
U-shaped prolongs upwards by bottom wall, the inner sidewall extended upwards from the inner end of the bottom wall, from the outboard end of the bottom wall
The lateral wall stretched, edge is bent from the upper end of the inner sidewall made of medial flange and from the upper end of the lateral wall
The composition of outboard flanges made of edge is bent, the external reinforcing plate for car at least to add from described outside in the section along vehicle width direction
The position corresponding with the other end of the vehicle width direction of the bottom wall of one end to the external reinforcing plate for car of the vehicle width direction of strong plate is
It is only located in a manner of near linear in the medial flange and the outboard flanges.
The reinforcement structure at the front longitudinal beam rear portion of second technical solution according to the present invention, before above-mentioned first technical solution
In the reinforcement structure at stringer rear portion, the external reinforcing plate for car in the section along vehicle width direction from the vehicle width side of the external reinforcing plate for car
To one end to the other end of the vehicle width direction of the external reinforcing plate for car until to be located in a manner of near linear the inside convex
On edge and the outboard flanges.
The reinforcement structure at front longitudinal beam rear portion according to the third technical aspect of the present invention, in above-mentioned first or second technical side
In the reinforcement structure at the front longitudinal beam rear portion of case, the external reinforcing plate for car include: the first joint portion engaged with the outboard flanges, with
Second joint portion of the medial flange engagement and putting down between first joint portion and second joint portion
Plate, the layer difference between first joint portion and/or second joint portion and the plate is only 0-3mm.
The reinforcement structure at the front longitudinal beam rear portion of fourth technical solution according to the present invention, in the above-mentioned first appointing into third
In the reinforcement structure at the front longitudinal beam rear portion of one technical solution, the intensity of the external reinforcing plate for car is higher than the intensity of the front longitudinal beam.
The reinforcement structure at the front longitudinal beam rear portion of the 5th technical solution according to the present invention, appointing in above-mentioned first to fourth
In the reinforcement structure at the front longitudinal beam rear portion of one technical solution, the plate thickness of the external reinforcing plate for car is not higher than the plate thickness of the front longitudinal beam.
The reinforcement structure at the front longitudinal beam rear portion of the 6th technical solution according to the present invention, appointing in the above-mentioned first to the 5th
In the reinforcement structure at the front longitudinal beam rear portion of one technical solution, it is provided in one and adds in the U-shaped section at the rear portion of the front longitudinal beam
Strong plate, the interior stiffening plate will be divided into two spaces between the external reinforcing plate for car and the rear portion of the front longitudinal beam.
The reinforcement structure at the front longitudinal beam rear portion of the 7th technical solution according to the present invention, before above-mentioned 6th technical solution
In the reinforcement structure at stringer rear portion, the intensity of the interior stiffening plate is higher than the intensity of the front longitudinal beam.
The reinforcement structure at the front longitudinal beam rear portion of the 8th technical solution according to the present invention, in above-mentioned 6th or the 7th technical side
In the reinforcement structure at the front longitudinal beam rear portion of case, the plate thickness of the interior stiffening plate is not higher than the plate thickness of the front longitudinal beam.
Invention effect
First technical solution according to the present invention, since external reinforcing plate for car in the section along vehicle width direction from outer at least to add
In approximate until one end to the position corresponding with the other end of the vehicle width direction of bottom wall of external reinforcing plate for car of the vehicle width direction of strong plate
The mode of straight line is located in the medial flange and outboard flanges at front longitudinal beam rear portion, therefore, can be improved by external reinforcing plate for car
The intensity at front longitudinal beam rear portion, although specifically, the impact that front longitudinal beam rear portion is subject to when front longitudinal beam rear portion is collided and impacts
Power drives front longitudinal beam rear portion opening (i.e. U-shaped section) to be opened to two sides, but external reinforcing plate for car is in two side flanges at front longitudinal beam rear portion
Place's welding, welding direction (up and down direction) open direction (i.e. Impact direction, left and right directions) perpendicular to opening, and external reinforcing plate for car is with before
Stringer rear portion constitutes closed section, so the deformation direction (i.e. extending direction) that external reinforcing plate for car is hit is consistent with Impact direction,
External reinforcing plate for car will limit front longitudinal beam rear portion after can not stretching again (by slight deformation) after being stretched to linearly near linear
Opening is opened, and is played the role of the limitation front longitudinal beam rear portion i.e. front longitudinal beam rear portion of opening opening and is deformed, improves front longitudinal beam rear portion
Intensity, thus, it is possible to which front longitudinal beam rear portion is remained U-shaped section by external reinforcing plate for car, thus prevent front longitudinal beam rear portion by
It is opened when collision to its U-shaped section two sides, front longitudinal beam rear portion is avoided to be subjected to impact destruction.
Second technical solution according to the present invention, since external reinforcing plate for car is straight in approximation on the section of entire vehicle width direction
Line, the section U-shaped opening that can be more reliably prevented from front longitudinal beam rear portion is opened to two sides, thus after more reliably avoiding front longitudinal beam
Portion is subjected to impact destruction.
According to the third technical aspect of the present invention, between the first joint portion of external reinforcing plate for car and the second joint portion and plate
Layer difference be that front longitudinal beam rear portion is collided external reinforcing plate for car when impacting in the case where 0mm (i.e. external reinforcing plate for car is integrally linear)
Indeformable (i.e. external reinforcing plate for car holding linear) is located on front longitudinal beam rear portion, can prevent front longitudinal beam rear portion to the full extent
Section U-shaped opening is opened to two sides, so that front longitudinal beam rear portion more reliably be avoided to be subjected to impact destruction.The first of external reinforcing plate for car
Layer difference between joint portion and/or the second joint portion and plate is greater than 0mm and in the case where being less than 1.5mm, it can be ensured that coating；
In the case where being more than or equal to 1.5mm and be less than or equal to 3mm, it can not only ensure coating, moreover it is possible to prevent impact noise.
Fourth technical solution according to the present invention can since the intensity of external reinforcing plate for car is higher than the intensity of front longitudinal beam
Further be reliably prevented front longitudinal beam rear portion when being collided to its U-shaped section two sides open, avoid front longitudinal beam rear portion by
Impact failure.
5th technical solution according to the present invention, since the plate thickness of external reinforcing plate for car is not higher than the plate thickness of front longitudinal beam, energy
The enough intensity for ensuring front longitudinal beam rear portion in the case where being increased without external reinforcing plate for car plate thickness, realizes the lighting of vehicle and can
Reduce cost.
6th technical solution according to the present invention, due to being equipped with interior stiffening plate between front longitudinal beam rear portion and external reinforcing plate for car,
Therefore multilayer cavity structure is formd, so as to further prevent front longitudinal beam rear portion to open to two sides, it is ensured that front longitudinal beam rear portion
Intensity, avoid front longitudinal beam rear portion from being subjected to impact destruction.
7th technical solution according to the present invention passes through since the intensity of interior stiffening plate is higher than the intensity of front longitudinal beam
It is further able to prevent front longitudinal beam rear portion from opening to two sides using the high interior stiffening plate of intensity, prevents impact failure.
8th technical solution according to the present invention, since the plate thickness of interior stiffening plate is not higher than the plate thickness of front longitudinal beam, energy
Enough plate thickness for not increasing interior stiffening plate, meet lightweight demand.
Front longitudinal beam rear portion is reliably prevented by the reinforcement knot at the front longitudinal beam rear portion of impact failure in accordance with the invention it is possible to provide
Structure.
Detailed description of the invention
Fig. 1 is the perspective view of the vehicle foreside from upper left side.
Fig. 2 is the side view of the front longitudinal beam rear perimeter on the right side of Fig. 1 from vehicle width direction outside.
Fig. 3 is the perspective view of the front longitudinal beam on the right side of Fig. 1 from vehicle width direction outside.
Fig. 4 is the perspective view at the front longitudinal beam rear portion on the right side of first embodiment.
Fig. 5 is the perspective view after second stiffening plate of removing at the front longitudinal beam rear portion on the right side of present embodiment.
The first stiffening plate of removing and the solid after the second stiffening plate that Fig. 6 is the front longitudinal beam rear portion on the right side of present embodiment
Figure.
Fig. 7 is the A-A sectional block diagram in Fig. 4.
Fig. 8 is the B-B cutaway view Amplified image in Fig. 4, is the figure for only amplifying section.
Fig. 9 is the longitudinal cross-section cross-sectional view at the front longitudinal beam rear portion on the right side in Fig. 4, is only to add front longitudinal beam rear portion, first
Figure shown in the section of strong plate and the second stiffening plate.
Figure 10 is the front longitudinal beam rear portion on the right side of second embodiment of the present invention, corresponding with Fig. 8 figure.
Description of symbols
10 ... vehicles；11 ... vehicle bodies；12 ... car rooms；13 ... power unit reception rooms；15 ... front baffles；16 ... front longitudinal beams；
18 ... subframes；21 ... front panels；25 ... load passage components；27 ... front longitudinal beam fronts；28,128 ... front longitudinal beam rear portions；28a,
The bottom wall at 128a ... front longitudinal beam rear portion；The lateral wall at 28b, 128b ... front longitudinal beam rear portion；28c, 128c ... front longitudinal beam rear portion it is interior
Side wall；The outboard flanges at 28d, 128d ... front longitudinal beam rear portion；The medial flange at 28e, 128e ... front longitudinal beam rear portion；28f,128f…
The through hole at front longitudinal beam rear portion；29,129 ... first stiffening plates (interior stiffening plate)；The bottom wall of the first stiffening plate of 29a, 129a ...；
The lateral wall of the first stiffening plate of 29b, 129b ...；The inner sidewall of the first stiffening plate of 29c, 129c ...；29d, 129d ... first reinforces
The through hole of plate；30,130 ... second stiffening plates (external reinforcing plate for car)；The plate of the second stiffening plate of 30a, 130a ...；30b,130b…
First joint portion of the second stiffening plate；The bending section of the second stiffening plate of 30c ...；Second engagement of the second stiffening plate of 30d, 130d ...
Portion；45 ... lower stringer sides extensions；46 ... channel side extensions；47 ... outriggers；58 ... front end supporting parts；61,161 ... is secondary
Vehicle frame mounting bracket；62 ... secure components；63,163 ... collar nuts；CL ... vehicle width center line.
Specific embodiment
Mode for carrying out the present invention is illustrated below based on attached drawing.In addition, the present invention be not limited to completely it is following
The embodiment of explanation can as long as having substantially identical structure with the present invention and can serve the same role effect
Enough make various changes.
Hereinafter, in the explanation for indicating orientation, on the basis of direction observed by the driver being landed on driver's seat.
" front " refer to the driver being landed on driver's seat towards direction and vehicle direction of travel；" rear " refers to
Be driver back to direction and vehicle traveling direction opposite direction；" left " refers to the left-hand side of driver；
" right " refers to the right-hand side of driver.In addition, in the following figures, existing only illustrate and the present invention for convenience
The case where related necessary part.
Firstly, brief description front part of vehicle body frame structure for automotive.As shown in Figures 1 and 2, vehicle 10 is, for example, passenger car, in vehicle
The inside of body 11 be formed with front power unit reception room 13, positioned at the power unit reception room 13 just after car room 12.
The vehicle body 11 is made of monocoque body, is extended relative to the center by the vehicle width direction of vehicle 10 and along vehicle front-rear direction
Vehicle width center line CL be formed as enantiomorphic form.The first half of the vehicle body 11 includes: the front longitudinal beam 16,16 for being bonded on left and right
Front end front baffle 15；The left and right sides positioned at 11 front of vehicle body and the front longitudinal beam along the left and right that vehicle body front-rear direction extends
16,16；Front panel 21 is divided on front side of forward and backward i.e. separation after the front longitudinal beam 16,16 of left and right and by vehicle body 11
Power unit reception room 13 and rear side car room 12 between next door；From the lower front longitudinal beam 16,16 being overlapped and be mounted on left and right
Lower end subframe 18.The front of the subframe 18 is linked under front baffle 15 by the load passage components 25 of left and right
Therefore portion when the head-on crash of vehicle 10 occurs, can make load of the impact force from front from front baffle 15 via left and right
Lotus passage components 25 are swimmingly transmitted to subframe 18.In addition, the lower end of the front longitudinal beam 16,16 of left and right is equipped with for passing through a left side
The front end supporting part 58 for the left and right that right secure component 62 installs the front end of the left and right of subframe 18.
The front longitudinal beam 16,16 of the left and right includes: front longitudinal beam front 27,27, is extended as the crow flies along vehicle body front-rear direction, and
Side lateral bend into vehicle width direction rearward extends simultaneously outside vehicle width direction afterwards；And front longitudinal beam rear portion 28,28, it is as follows
Construction, i.e., to be once bent by the mode under front panel 21 to the back lower place and posterior end rearward curved bending structure
Make, i.e., the front longitudinal beam rear portion 28,28 along the lower end of front panel 21 with vehicle body rear is tended to and inclined downward backward, then afterwards under
End rearward horizontally extends.
The lower stringer sides extension 45,45 of left and right and the channel side of left and right are branched off into the rear end at front longitudinal beam rear portion 28,28
Extension 46,46.That is, the rear end at the front longitudinal beam rear portion 28,28 of left and right, the lower stringer sides extension 45 of left and right, 45, a left side
Being integrally formed for the right intercombination of channel side extension 46,46 is formed as overlooking substantially Y shape.The lower stringer sides of left and right are stretched
The front end in portion 45,45 is connected lower stringer (i.e. chassis runner, the omission of left and right by the outrigger 47,47 of left and right out
Diagram) on.
Referring to the front longitudinal beam rear portion that the present invention will be described in detail centered on the front longitudinal beam rear portion on right side Fig. 3 to Fig. 9
Reinforcement structure.The reinforcement structure at the front longitudinal beam rear portion in left side and right side bilateral symmetry, and the description is omitted.
As shown in Fig. 6, Fig. 7 and Fig. 8, front longitudinal beam rear portion 28 is in the U-shaped that is open upwards of section, include bottom wall 28a,
From on the outside of the vehicle width direction that the outboard end of bottom wall 28a extends upwards lateral wall 28b, from the inner end of bottom wall 28a to
Top extend vehicle width direction on the inside of inner sidewall 28c, edge is bent from the upper end of lateral wall 28b made of outboard flanges
28d and medial flange 28e made of bending edge from the upper end of inner sidewall 28c.As shown in Fig. 5, Fig. 7 and Fig. 8,
The first stiffening plate 29 is provided in front longitudinal beam rear portion 28, specifically in the U-shaped section at front longitudinal beam rear portion 28.First stiffening plate
29 are formed in U-shaped section, therefore alternatively referred to as " interior stiffening plate ".The U that first stiffening plate 29 is also open in section upwards
Shape, comprising: bottom wall 29a, the bottom wall 28a length direction along front longitudinal beam rear portion 28 are arranged；It is upward from the outboard end of bottom wall 29a
Lateral wall 29b on the outside of the vehicle width direction of Fang Yanshen；On the inside of the vehicle width direction that the inner end of bottom wall 29a extends upwards
Inner sidewall 29c.First stiffening plate 29 is arranged and engaging with the lateral wall 28b at front longitudinal beam rear portion 28, inner sidewall 28c preceding
On stringer rear portion 28.Specifically, the lateral wall 29b of the first stiffening plate 29 and inner sidewall 29c is made to pass through welding (such as point respectively
Weldering) and be engaged on the lateral wall 28b and inner sidewall 28c at front longitudinal beam rear portion 28, thus by the setting of the first stiffening plate 29 preceding vertical
On beam rear portion 28.
As shown in Fig. 3, Fig. 4, Fig. 7 and Fig. 8, the second stiffening plate 30 is provided on front longitudinal beam rear portion 28.Second reinforcement
Plate 30 is in section near linear shape, and setting exists and engaging with the outboard flanges 28d at front longitudinal beam rear portion 28 and medial flange 28e
On front longitudinal beam rear portion 28, i.e. the second stiffening plate 30 is covered on front longitudinal beam rear portion 28 with the section near linear shape in vehicle width direction
On.More specifically, the second stiffening plate is from the bonding station with outboard flanges 28d to the engagement position with the medial flange 28e
It is set to and is only covered on front longitudinal beam rear portion 28 with the section near linear shape in vehicle width direction.Since second stiffening plate 30 is covered
It covers on front longitudinal beam rear portion 28, be covered on U-shaped section, therefore alternatively referred to as " external reinforcing plate for car ".Second stiffening plate 30 includes:
First joint portion 30b is engaged with the outboard flanges 28d at front longitudinal beam rear portion 28；Second joint portion 30d, with front longitudinal beam rear portion
28 medial flange 28e engagement；Plate 30a, between the first joint portion 30b and the second joint portion 30d, and along front longitudinal beam
The setting of the length direction of the bottom wall 28a at rear portion 28 and the bottom wall 29a of the first stiffening plate 29；And from the vehicle width side of plate 30a
The bending section 30c that inside side extends upwards.The first joint portion 30b and the second joint portion 30d pass through respectively welding (such as
Spot welding) and it is engaged in the outboard flanges 28d and medial flange 28e at front longitudinal beam rear portion 28.
It is illustrated about " near linear ".As shown in the amplification sectional view of Fig. 8, the first joint portion of the second stiffening plate 30
30b is connect by minimum bending section with plate 30a, i.e., there are minimum layer is poor between the first joint portion 30b and plate 30a
(this layer difference exaggeration is shown in fig. 8).In present embodiment, the size of the bending section in the up-down direction is that height (can also
Layer difference or difference in height referred to as between the first joint portion 30b and plate 30a) it is 2mm.Such layer is poor, is in order to ensure coating
It is designed with impact noise is prevented.Described " near linear " includes the case where layer difference 2mm in the present invention, it is more specific and
Speech includes the case where that layer difference is 0~3mm.On the other hand, the bending section 30c between the second joint portion 30d and plate 30a is upper
The upward size in lower section is that height (layer difference or difference in height alternatively referred to as between the second joint portion 30d and plate 30a) is larger, greatly
In 3mm.That is, the second stiffening plate 30 from one end of vehicle width direction (in the present embodiment for the first joint portion 30b's
Vehicle width direction outboard end) to the second stiffening plate 30 and the vehicle width direction other end of bottom wall 28a (be in the present embodiment bottom wall
The vehicle width direction inner end of 28a) it is near linear shape until corresponding position.In other words, the second stiffening plate 30 is along vehicle width
The section in direction is from the side flange (side i.e. in medial flange 28e and outboard flanges 28d) with front longitudinal beam rear portion 28
The corresponding position in vehicle width direction one end is to the vehicle with another side flange (another party in medial flange 28e and outboard flanges 28d)
Medial flange 28e and the outside at front longitudinal beam rear portion 28 are crossed on until the corresponding position in wide direction one end in a manner of near linear
On flange 28d.Again in other words, the second stiffening plate 30 is to be to connect from the first joint portion 30b and second along the section of vehicle width direction
The vehicle width direction one end (the vehicle width direction outboard end of the first joint portion 30b) at the side joint portion in conjunction portion 30d connects to another party
Vehicle width direction one end (vehicle width direction outboard end of the second joint portion 30d, more particularly, in being curved in present embodiment in conjunction portion
The vehicle width direction outboard end of pars convoluta 30c) until be crossed in a manner of near linear front longitudinal beam rear portion 28 medial flange 28e and
On outboard flanges 28d.
As a result, when front part of vehicle is collided, specifically, although preceding when front longitudinal beam rear portion 28 is collided and impacts
The impact force that stringer rear portion 28 is subject to drives front longitudinal beam rear portion opening (i.e. U-shaped section) to be opened to two sides, but the second stiffening plate
30 weld at two side flanges at front longitudinal beam rear portion 28, and welding direction (up and down direction) opens direction (i.e. stress perpendicular to opening
Direction, left and right directions), the second stiffening plate 30 constitutes closed section with front longitudinal beam rear portion 28, so the second stiffening plate 30 is hit
Deformation direction (i.e. extending direction) it is consistent with Impact direction, the second stiffening plate 30 near linear be stretched to it is linear after can not
The opening for limiting front longitudinal beam rear portion 28 is opened after being stretched again (by slight deformation), plays the opening at limitation front longitudinal beam rear portion 28
The effect that i.e. front longitudinal beam rear portion 28 deforms is opened, improves the intensity at front longitudinal beam rear portion 28, thus, it is possible to pass through the second stiffening plate
Front longitudinal beam rear portion 28 is remained U-shaped section by 30, to prevent front longitudinal beam rear portion 28 when being collided to its U-shaped section two
Side is opened, and front longitudinal beam rear portion 28 is avoided to be subjected to impact destruction.
In addition, from Fig. 3, Fig. 4 can be seen that the second stiffening plate 30 on the whole length direction of the first joint portion 30b with
It is outside vehicle width direction from the vehicle width direction outboard end of the first joint portion 30b to the second joint portion 30d along the section of vehicle width direction
It is crossed in a manner of near linear on front longitudinal beam rear portion 28 until side.
In the above-described embodiment, the layer difference between the first joint portion 30b and plate 30a of the second stiffening plate 30 is 2mm,
But it is preferred that poor without layer between the two, this is because being collided impact in the case where no layer is poor at front longitudinal beam rear portion 28
When, the second stiffening plate 30 is vertical before being located at the form of straight lines (stretching process that no near linear is converted into form of straight lines) of script
Beam rear portion 28, therefore any deformation will not also occur for front longitudinal beam rear portion 28 with matching, so that can more play prevents preceding indulge
Beam rear portion is subjected to impact the effect of destruction.
In addition, the steel that front longitudinal beam 16 (front longitudinal beam rear portion 28) uses is JSC780Y, the first stiffening plate 29 and second is reinforced
The steel that plate 30 uses is HQAS1500H, and the yield strength of the first stiffening plate 29 and the second stiffening plate 30 is greater than front longitudinal beam as a result,
16 yield strength, so as to further be reliably prevented front longitudinal beam rear portion 28 when being collided to its U-shaped section two sides
It opens, front longitudinal beam rear portion 28 is avoided to be subjected to impact destruction.Here, front longitudinal beam 16, the first stiffening plate 29 and the second stiffening plate 30
Specific steel are an example, as long as can ensure that the intensity of the first stiffening plate 29 and the second stiffening plate 30 is greater than the strong of front longitudinal beam 16
Degree, can also be using other steel.In addition, the plate thickness of the first stiffening plate 29 and the second stiffening plate 30 is not higher than front longitudinal beam
16, therefore can ensure the strong of front longitudinal beam rear portion in the case where being increased without the plate thickness of the first stiffening plate and the second stiffening plate
Degree, realizes the lighting of vehicle and can reduce cost.
In addition, as shown in Figure 7,8, will be divided between second stiffening plate 30 and front longitudinal beam rear portion 28 by the first stiffening plate 29
Two spaces form multilayer cavity structure, therefore can further prevent while ensuring the intensity at front longitudinal beam rear portion 28
Only front longitudinal beam rear portion 28 is opened to two sides.
As shown in Figures 7 and 8, subframe mounting bracket 61, subframe installation are equipped in the lower section at front longitudinal beam rear portion 28
Bracket 61 has downwards defined interval from bottom wall 28a, and is engaged in front longitudinal beam rear portion 28.In the subframe mounting bracket 61
On be bonded to collar nut 63, the collar nut 63 be with internal screw thread perforative along the vertical direction tubular component, thereon
End is formed through the perforation of the through hole 28f of the bottom wall 28a at front longitudinal beam rear portion 28 and the bottom wall 29a of the first stiffening plate 29
Hole 29d is simultaneously engaged, and lower end is engaged in the subframe mounting bracket 61.In this way, the collar nut 63 is engaged up and down
In subframe mounting bracket 61, front longitudinal beam rear portion 28 and the first stiffening plate 29.Screwing in the collar nut 63 has secure component
62 (referring to Fig.1).
As shown in Fig. 3,4,9, the second stiffening plate 30 from the front end at front longitudinal beam rear portion 28 (be corresponding front longitudinal beam front 27
One end) extend to the rear end (being one end of corresponding chassis runner) at front longitudinal beam rear portion 28, in other words, the second stiffening plate
30 are located at front longitudinal beam rear portion 28 in a manner of extending between the front and rear end at front longitudinal beam rear portion 28.In addition, first reinforces
Plate 29 also extends to the rear end at front longitudinal beam rear portion 28 from the front end at front longitudinal beam rear portion 28, i.e. the first stiffening plate 29 is preceding vertical
The mode extended between the front and rear end at beam rear portion 28 is located at front longitudinal beam rear portion 28.Since the first stiffening plate 29 and second adds
Strong plate 30 is that vehicle front-rear direction is crossed between the front and rear end at front longitudinal beam rear portion 28 along its length, therefore can be
Ensure the intensity at front longitudinal beam rear portion 28 within the scope of the whole length at front longitudinal beam rear portion 28, it is preceding vertical so as to be prevented more reliably
It is opened to two sides at beam rear portion 28.
It can be seen that the length of the inner sidewall 28c at front longitudinal beam rear portion 28 in the up-down direction i.e. from the enlarged section of Fig. 8
Its depth is greater than the length of lateral wall 28b in the up-down direction i.e. its depth.This is to make front longitudinal beam rear portion 28 cooperate front wall
The bottom surface of plate 21.Both specifically, front panel 21 is provided on front longitudinal beam rear portion 28 as described above, it is therefore desirable to make
Shape matching, in actual entire vehicle design, first design front panel, it is vertical before being designed further according to the bottom shape of front panel
Beam rear portion, in the present embodiment in order to make front longitudinal beam rear portion 28 cooperate side high side of the front panel 21 in vehicle width direction low
Bottom surface (illustration omitted) and be designed to that the depth of lateral wall 28b and inner sidewall 28c are inconsistent.At this front longitudinal beam rear portion 28 1
In the low set-up mode in the high side in side, the low side in front longitudinal beam rear portion 28 is conducive to increase the foot well of passenger.In addition, in order to
Cooperate the depth of the lateral wall 28b and inner sidewall 28c at front longitudinal beam rear portion 28 different, be located at the second joint portion 30d and plate 30a it
Between bending section 30c be greater than 3mm.
Certainly, according to different automobile types, there is also the front panels of the setting position corresponding position with front longitudinal beam rear portion in vehicle width side
The case where obvious height change is not present upwards, is shown in FIG. 10 structure in this case.Figure 10 is the second reality of the invention
Apply the front longitudinal beam rear portion 128 on the right side of mode, corresponding with Fig. 8 figure.With only difference is that for above-mentioned first embodiment,
In second embodiment, the depth of the lateral wall 128b and inner sidewall 128c at front longitudinal beam rear portion 128 are roughly the same and do not have
Bending section 30c, is in addition to this same as the above first embodiment, therefore to component identical with first embodiment or equivalent
Similar appended drawing reference is marked, and is omitted the description, is only illustrated centered on the difference with first embodiment.
As shown in Figure 10, the length of the inner sidewall 128c at front longitudinal beam rear portion 128 in the up-down direction i.e. its depth and outside
The length of wall 128b in the up-down direction i.e. its depth is roughly the same.Second stiffening plate 130 is not present and first embodiment
The corresponding component of bending section 30c, is integrally formed into section near linear shape, i.e. the second stiffening plate 130 is from one end of vehicle width direction
It is near linear shape to the other end.In this case, the section U-shaped opening at front longitudinal beam rear portion 128 can be more reliably prevented to two
Side is opened, so that front longitudinal beam rear portion more reliably be avoided to be subjected to impact destruction.In this case, the second stiffening plate 130 connects first
On the whole length direction of conjunction portion 130b and the second joint portion 130d using from one end of vehicle width direction to the other end as near linear
The mode of shape is arranged.
More than, embodiments and advantages of the present invention are illustrated, but the present invention is not limited to the above embodiments,
It does not depart from and is able to carry out various changes in the range of present subject matter.
In addition, the reinforcement structure at front longitudinal beam rear portion is illustrated by taking passenger car as an example in the above-described embodiment, but this hair
It is bright to be certainly not limited to this, as long as the structure that the section for preventing a side open is opened in loading process, can be applicable in the present invention.
Claims (8)
1. a kind of reinforcement structure at front longitudinal beam rear portion, including front longitudinal beam and the external reinforcing plate for car affixed with the rear portion of the front longitudinal beam,
It is characterized by:
The rear portion of the front longitudinal beam is in U-shape along the section of vehicle width direction, extends upwards by bottom wall, from the inner end of the bottom wall
Inner sidewall, extend upwards from the outboard end of the bottom wall lateral wall, from the upper end of the inner sidewall by edge bending and
At medial flange and outboard flanges made of from the upper end of the lateral wall bending edge form,
The external reinforcing plate for car in the section along vehicle width direction at least from one end of the vehicle width direction of the external reinforcing plate for car to institute
It is located in a manner of near linear until the position corresponding with the other end of the vehicle width direction of the bottom wall for stating external reinforcing plate for car
In the medial flange and the outboard flanges.
2. the reinforcement structure at front longitudinal beam rear portion according to claim 1, it is characterised in that:
The external reinforcing plate for car in the section along vehicle width direction from one end of the vehicle width direction of the external reinforcing plate for car to described outer
The medial flange and the outboard flanges are located at until the other end of the vehicle width direction of stiffening plate in a manner of near linear
On.
3. the reinforcement structure at front longitudinal beam rear portion according to claim 1 or 2, it is characterised in that:
The external reinforcing plate for car includes: the first joint portion engaged with the outboard flanges, engage with the medial flange second
Joint portion and the plate between first joint portion and second joint portion,
Layer difference between first joint portion and/or second joint portion and the plate is only 0-3mm.
4. the reinforcement structure at front longitudinal beam rear portion according to claim 1 or 2, it is characterised in that:
The intensity of the external reinforcing plate for car is higher than the intensity of the front longitudinal beam.
5. the reinforcement structure at front longitudinal beam rear portion according to claim 4, it is characterised in that:
The plate thickness of the external reinforcing plate for car is not higher than the plate thickness of the front longitudinal beam.
6. the reinforcement structure at front longitudinal beam rear portion according to claim 1 or 2, it is characterised in that:
Be provided with stiffening plate in one in the U-shaped section at the rear portion of the front longitudinal beam, the interior stiffening plate by the external reinforcing plate for car with
It is divided into two spaces between the rear portion of the front longitudinal beam.
7. the reinforcement structure at front longitudinal beam rear portion according to claim 6, it is characterised in that:
The intensity of the interior stiffening plate is higher than the intensity of the front longitudinal beam.
8. the reinforcement structure at front longitudinal beam rear portion according to claim 7, it is characterised in that:
The plate thickness of the interior stiffening plate is not higher than the plate thickness of the front longitudinal beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710515800.0A CN109204512B (en) | 2017-06-29 | 2017-06-29 | Reinforcing structure at rear part of front longitudinal beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710515800.0A CN109204512B (en) | 2017-06-29 | 2017-06-29 | Reinforcing structure at rear part of front longitudinal beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109204512A true CN109204512A (en) | 2019-01-15 |
| CN109204512B CN109204512B (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710515800.0A Active CN109204512B (en) | 2017-06-29 | 2017-06-29 | Reinforcing structure at rear part of front longitudinal beam |
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| Country | Link |
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| CN (1) | CN109204512B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246447A (en) * | 2021-04-26 | 2022-10-28 | 本田技研工业株式会社 | Vehicle body front structure |
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| CN203237287U (en) * | 2013-05-16 | 2013-10-16 | 安徽江淮汽车股份有限公司 | Engine compartment front longitudinal beam rear segment structure |
| CN203255267U (en) * | 2013-05-08 | 2013-10-30 | 北京汽车股份有限公司 | Front floor assembly and automobile |
| CN205186284U (en) * | 2015-12-04 | 2016-04-27 | 金龙汽车车身（常州）有限公司 | Solebar additional strengthening |
| CN105818862A (en) * | 2015-01-05 | 2016-08-03 | 广州汽车集团股份有限公司 | Front cabin longitudinal beam rear segment structure and automobile |
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|---|---|---|---|---|
| DE102011077810A1 (en) * | 2011-06-20 | 2012-12-20 | Bayerische Motoren Werke Aktiengesellschaft | Body for retaining components, such as internal combustion engine, front bumper or chassis component of motor vehicle, has side sill and cast carrier, which are connected with one another by multiple screws |
| CN203255267U (en) * | 2013-05-08 | 2013-10-30 | 北京汽车股份有限公司 | Front floor assembly and automobile |
| CN203237287U (en) * | 2013-05-16 | 2013-10-16 | 安徽江淮汽车股份有限公司 | Engine compartment front longitudinal beam rear segment structure |
| CN105818862A (en) * | 2015-01-05 | 2016-08-03 | 广州汽车集团股份有限公司 | Front cabin longitudinal beam rear segment structure and automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246447A (en) * | 2021-04-26 | 2022-10-28 | 本田技研工业株式会社 | Vehicle body front structure |
| CN115246447B (en) * | 2021-04-26 | 2024-05-14 | 本田技研工业株式会社 | Front structure of vehicle body |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109204512B (en) | 2020-03-27 |
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