CN101037118A - Vehicle front body structure - Google Patents

Vehicle front body structure Download PDF

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Publication number
CN101037118A
CN101037118A CNA2007100886883A CN200710088688A CN101037118A CN 101037118 A CN101037118 A CN 101037118A CN A2007100886883 A CNA2007100886883 A CN A2007100886883A CN 200710088688 A CN200710088688 A CN 200710088688A CN 101037118 A CN101037118 A CN 101037118A
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CN
China
Prior art keywords
mentioned
front side
suspension support
support tower
assembly
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Granted
Application number
CNA2007100886883A
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Chinese (zh)
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CN101037118B (en
Inventor
佐佐木伸
井上实
青沼隆浩
藤井宏章
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Mazda Motor Corp
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Mazda Motor Corp
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Publication date
Priority claimed from JP2006070647A external-priority patent/JP2007245864A/en
Priority claimed from JP2006070646A external-priority patent/JP2007245863A/en
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Publication of CN101037118A publication Critical patent/CN101037118A/en
Application granted granted Critical
Publication of CN101037118B publication Critical patent/CN101037118B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B62D25/088—Details of structures as upper supports for springs or dampers

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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)
  • Vehicle Body Suspensions (AREA)

Abstract

The present inventive vehicle front body structure, comprises a front side frame provided so as to project forward from a dash panel; an apron member provided so as to project substantially forward at a location that is outside the vehicle width direction of the front side frame; a suspension tower portion provided so as to at least partly protrude in an engine room for at least partly accommodating a front suspension vibration damper therein, the suspension tower portion being engaged with the apron member and the front side frame; an engine mount provided at the front side frame in front of the suspension tower portion so as to support a side portion of a power plant; and a first connecting member provided so as to straightly interconnect an upper portion of the suspension tower portion and a portion of the front side frame that is located in front of the engine mount, the member being disposed so as to overlap with the engine mount in a top view. The present invention provide a front structure of vehicle body for transmitting a collision load working on a front side frame to an upper portion of a vehicle body which is capable of absorbing the energy caused by the axial compression of the front side frame by suppressing any upward bend of the front side frame by reliably dispersing the collision load to the upper portion of the vehicle body while arranging an engine mount on the front side frame.

Description

Vehicle body front structure
Technical field
The present invention relates to the vehicle body front structure of automobile, particularly relate to a kind of front side member (front sideframe) that comprises pair of right and left and the vehicle body front structure of the suspension support tower portion (suspension tower) of draft hitch is installed.
Background technology
In the past,, just improved the collision safety performance of vehicle, how will act on the problem that the collision load of the front side member that extends along the vehicle body fore-and-aft direction disperses to be delivered to vehicle body rear one side and inquire at the front-body structure of automobile.
In the automotive front body structure in the past, above-mentioned collision load, mainly be delivered to the vehicle body frames (body frame) that links to each other with the rear end of front side member and be positioned at body bottom section, rather than be delivered to body top section, therefore, near the position that front side member might be positioned in its base portion the dash shield (dash panel) produces bending upward, can't realize the energy absorbing that is undertaken by the axial compression of front side member thus fully.
For this reason, the open communique spy of Japanese Patent opens the vehicle body front structure shown in 2005-335619 number, possess the rigid element that extends and connect front side member and baffle component (apron member) along wheel shield (wheel apron) obliquely upward, the collision load that acts on front side member can be disperseed to be delivered to the baffle component that is positioned at body top section.
In addition, for front side member,, need to be provided with driving engine department of assembly (engine mount) sometimes in order to support driving engine equal power device (power plant).Particularly when engine installation was horizontally set (engine output shaft is provided with along the overall width direction), usually, how the driving engine department of assembly can be arranged on the positions, the place ahead of suspension support tower portion.
But the driving engine department of assembly of above-mentioned setting, if the rigid element of the connection front side member that above-mentioned communique puts down in writing is set, then driving engine department of assembly and rigid element just can produce interference mutually.For avoiding the generation of this situation, be necessary rigid element is arranged on the position, rear of driving engine department of assembly, or rigid element formed from overlooking direction see and be bending, to avoid the driving engine department of assembly.But adopt this structure, collision energy might disperse to be delivered to body top section fully.
Summary of the invention
Therefore, the objective of the invention is to, be delivered in the vehicle body front structure of body top section at the collision load that will act on front side member, even the department of assembly is arranged at front side member with driving engine, also can effectively collision load be distributed to body top section, with inhibition front side member warpage upward, thus the energy absorbing that realization is undertaken by the axial compression of front side member.
Vehicle body front structure of the present invention comprises, front side member is side-prominent to vehicle front from dash shield; Baffle component is positioned at outside the overall width direction of above-mentioned front side member, and is outstanding to vehicle front; Suspension support tower portion engages with above-mentioned baffle component and above-mentioned front side member, to the engine room protuberance, accommodates the front wheel suspension shock absorber; The driving engine department of assembly is configured in the top at position, the above-mentioned suspension support tower of being positioned at of above-mentioned front side member portion the place ahead, the sidepiece of supporting motive force device; The 1st transom, linearity ground connect the top of above-mentioned suspension support tower portion and the position that is positioned at the place ahead, above-mentioned driving engine department of assembly of above-mentioned front side member, see with above-mentioned driving engine department of assembly and overlap from overlooking direction.
Adopt this structure, can be delivered to top effectively by the collision energy that above-mentioned the 1st transom will act on front side member with baffle component bonded assembly suspension support tower portion.Therefore,, also can effectively collision load be distributed to body top section, suppress front side member warpage upward, with the energy absorbing of realizing being undertaken by the axial compression of front side member even the driving engine department of assembly is configured on the front side member.
In addition, in above-mentioned vehicle body front structure, comparatively it is desirable to, above-mentioned driving engine department of assembly is installed on above-mentioned the 1st transom, above-mentioned the 1st transom, making of producing during with the vehicle frontal collision transfer of energy that above-mentioned engine installation retreats is to the top of above-mentioned suspension support tower portion.
Adopt said structure, the engine installation that is produced in the time of can be with vehicle generation head-on crash retreat energy, be delivered to the top of suspension support tower portion by above-mentioned the 1st transom, therefore, the above-mentioned energy that retreats can be delivered to body top section effectively via top, the baffle component of suspension support tower portion.Therefore, by above-mentioned the 1st transom is set, can be with the upper and lower that energy disperses to be delivered to vehicle body that retreats of engine installation.
In addition, in above-mentioned vehicle body front structure, comparatively it is desirable to, above-mentioned the 1st transom comprises, the gusset parts, and the front face in above-mentioned suspension support tower portion is extended to the bottom from the top of this suspension support tower portion; The installation portion of driving engine department of assembly engages with the front portion of above-mentioned gusset parts, supports above-mentioned driving engine department of assembly; The front face of above-mentioned gusset parts and above-mentioned suspension support tower portion forms the closed sectional structure.
Adopt said structure, utilize the suspension support tower portion that is set at high stiffness for draft hitch is installed to constitute the closed sectional structure, can improve the rigidity of above-mentioned gusset parts.
In addition, in above-mentioned vehicle body front structure, comparatively it is desirable to, also comprise, the baffle portion that connects above-mentioned baffle component and above-mentioned front side member at the position, the place ahead of above-mentioned suspension support tower portion, the bottom of the installation portion of above-mentioned driving engine department of assembly engages with above-mentioned front side member, and the overall width direction outside portion of the installation portion of this driving engine department of assembly engages with above-mentioned baffle portion, and the upward face of the installation portion of above-mentioned driving engine department of assembly is fixed in above-mentioned driving engine department of assembly.
Adopt said structure, also the energy charge that retreats of engine installation can be distributed to baffle portion.Like this, the installation portion that can prevent the driving engine department of assembly takes place damaged, thus can be effectively with the above-mentioned transfer of energy that retreats to front side member.
In addition, in above-mentioned vehicle body front structure, comparatively it is desirable to, the installation portion of above-mentioned driving engine department of assembly is the case shape, and last face has opening, and above-mentioned driving engine department of assembly embeds above-mentioned opening and fixed.
Adopt said structure, be the driving engine department of assembly installation portion of case shape, the installation portion of energy charge through this driving engine department of assembly that retreat of engine installation can be disperseed, thereby the installation portion that can prevent the driving engine department of assembly takes place damaged by setting.
In addition, in above-mentioned vehicle body front structure, comparatively it is desirable to, above-mentioned the 1st transom, the upper bond of its rear portion and above-mentioned suspension support tower portion, the position that is positioned at the place ahead, above-mentioned driving engine department of assembly in the anterior and above-mentioned front side member engages, and constitutes from the bridge shape of the top process of above-mentioned driving engine department of assembly.
Adopt said structure, owing to connect bridge shape the 1st transom on front side member and suspension support tower portion top, extend in the top of driving engine department of assembly, see with this driving engine department of assembly and overlap from overlooking direction, therefore, even the driving engine department of assembly is arranged on the front side member, also can not be subjected to the influence of driving engine department of assembly and linearly setting between front side member and suspension support tower portion as above-mentioned the 1st transom of load transfer member.Therefore, need not to change the strong point (driving engine department of assembly be provided with position) of engine installation, just can be by being above-mentioned the 1st transom of bridge shape, the collision energy that will act on front side member effectively is delivered to the top of suspension support tower portion.In addition and since the position in strong point the place ahead that in front side member, is positioned at engine installation with load dispersing to body top section, therefore, need not to reduce the position that is positioned at above-mentioned strong point rear in the front side member rigidity improve the impact absorption performance.Thus, can improve the rigidity of the engine installation strong point of front side member, improve the rigidity of support of engine installation.
In addition, in above-mentioned vehicle body front structure, comparatively it is desirable to, above-mentioned the 1st transom, have with above-mentioned front side member in be positioned at the 1st base portion that the position in the place ahead, above-mentioned driving engine department of assembly engages, and with above-mentioned front side member in be positioned at the 2nd base portion that the position at rear, above-mentioned driving engine department of assembly engages, the 2nd base portion is seen with above-mentioned driving engine department of assembly from positive apparent direction to coincide.
Adopt said structure, because the 1st base portion is connected the position, the place ahead of driving engine department of assembly, the 2nd base portion is connected the position, rear of driving engine department of assembly, therefore, when the relatively lighter head-on crash of vehicle occurrence degree, collision energy only is delivered to the top of suspension support tower portion from the 1st base portion, and when the relatively heavier head-on crash of vehicle occurrence degree, engine installation retreat the top that energy can be delivered to suspension support tower portion from the 2nd base portion.Like this, can the energy on the top that is delivered to suspension support tower portion be changed by the weight of collision degree, the load transmission that implementation efficiency is higher be by above-mentioned bridge shape the 1st transom load diversity more effectively.
In addition, in above-mentioned vehicle body front structure, comparatively it is desirable to, rear view of vehicle one side of above-mentioned suspension support tower portion is formed with the car neck that extends along the overall width direction, the top and the above-mentioned car neck of above-mentioned suspension support tower portion are provided with the 2nd transom that connects these two parts along fore-and-aft direction between the two.
Adopt said structure, top and car neck by the 2nd transom connection suspension support tower portion can make the above-mentioned energy that retreats on the top that is delivered to suspension support tower portion be directly delivered to the car neck.Like this, be delivered to suspension support tower portion top retreat energy, also can disperse to be delivered to the car neck, thereby can improve the collision performance of vehicle body effectively.Therefore, can be carried out effectively to the load dispersing that body top section carries out, thereby can be realized the energy absorbing that undertaken by the axial compression of front side member more effectively by above-mentioned the 1st transom.
In addition, in above-mentioned vehicle body front structure, above-mentioned front side member, above-mentioned suspension support tower portion and above-mentioned the 1st transom, the left and right sides in the overall width direction is provided with, above-mentioned the 1st transom of pair of right and left, be arranged to from overlooking narrower " Ha " shape of spacing that direction is seen vehicle the place ahead one side end, be provided with along the overall width direction between the top of the above-mentioned suspension support tower portion of pair of right and left and connect this suspension support tower connecting rod suspension support tower portion.
Adopt said structure, owing to act on the collision load of front side member, can be because of " Ha " shape setting of above-mentioned the 1st transom, and make the top of suspension support tower portion produce displacement along the overall width direction, displacement by this overall width direction, suspension support tower connecting rod is produced along the overall width direction, that is along this suspension support tower pitman shaft to plastic deformation.Like this, utilize existing being used to improve vehicle handling and stability and the suspension support tower connecting rod that is provided with, can disperse the collision energy of sorption in front side member.Therefore, need not new reinforcement unit to be set, just can absorb collision energy at body top section.Particularly, owing to above-mentioned the 1st transom of bridge shape is avoided the driving engine department of assembly and is provided with, therefore, can improve transmission performance from collision energy to body top section that transmit, can make the top of suspension support tower portion on the overall width direction, produce displacement largely, with the shock absorbing capability of further raising suspension support tower connecting rod.
Description of drawings
Fig. 1 is the block diagram of wanting portion that expression relates to the vehicle body front structure of first embodiment of the invention.
Fig. 2 relates to the birds-eye view of the vehicle body front structure of first embodiment of the invention.
Fig. 3 is the lateral plan of wanting portion that expression relates to the vehicle body front structure of first embodiment of the invention.
Fig. 4 is the exploded perspective view of wanting portion that expression relates to the vehicle body front structure of first embodiment of the invention.
Fig. 5 (a) is the cutaway view of the A-A line direction of arrow among Fig. 1, and Fig. 5 (b) is the cutaway view of the B-B line direction of arrow among Fig. 1.
Fig. 6 is the lateral plan that retreats the transfer of energy direction when being used to vehicle generation head-on crash is described.
Fig. 7 is the cutaway view of the connection structure on the suspension support tower top in the expression first embodiment of the invention.
Fig. 8 is the car neck (cowl box) of expression in the first embodiment of the invention and the cutaway view of the structure of dash shield.
Fig. 9 is the block diagram of wanting portion that expression relates to the vehicle body front structure of second embodiment of the invention.
Figure 10 is the exploded perspective view of wanting portion that expression relates to the vehicle body front structure of second embodiment of the invention.
Figure 11 (a) is the cutaway view of the C-C line direction of arrow among Fig. 9, and Figure 11 (b) is the cutaway view of the D-D line direction of arrow among Fig. 9.
Figure 12 is the right perspective view of left part that expression relates to the vehicle body front structure of third embodiment of the invention.
Figure 13 is the left side block diagram of right side part that expression relates to the vehicle body front structure of third embodiment of the invention.
Figure 14 relates to the exploded perspective view of left part of the vehicle body front structure of third embodiment of the invention.
Figure 15 relates to the birds-eye view of the vehicle body front structure of third embodiment of the invention.
Figure 16 relates to the front elevation of left part of the vehicle body front structure of third embodiment of the invention.
Figure 17 is the lateral plan during from the inboard left part of observing the vehicle body front structure that relates to third embodiment of the invention of engine room.
Figure 18 (a) is the cutaway view of the E-E line direction of arrow among Figure 16, and Figure 18 (b) is the cutaway view of the F-F line direction of arrow among Figure 16.
Figure 19 is the birds-eye view that expression relates to the state of vehicle body front structure before collision happens of third embodiment of the invention.
Figure 20 is the birds-eye view that expression relates to the state of vehicle body front structure when collision happens of third embodiment of the invention.
Figure 21 is the birds-eye view that expression relates to the state of vehicle body front structure when collision happens of third embodiment of the invention.
Figure 22 is the birds-eye view that expression relates to the state of vehicle body front structure when collision happens of third embodiment of the invention.
Figure 23 is the right perspective view of left part of the vehicle body front structure of the expression variation that relates to third embodiment of the invention.
Figure 24 relates to the exploded perspective view of left part of vehicle body front structure of the variation of third embodiment of the invention.
The specific embodiment
Below, with reference to the accompanying drawings embodiments of the present invention are elaborated.
(first embodiment)
Fig. 1 and Fig. 3 are respectively block diagram and the lateral plans of wanting portion's (right side part) that expression relates to the vehicle body front structure of first embodiment of the invention, and Fig. 2 is the birds-eye view of above-mentioned vehicle body front structure.Among Fig. 1 to Fig. 3, the front portion of car chamber 1, mainly comprise, be positioned at the lower edge of front screen (front glass) (not shown) and on the overall width direction, connect the car neck 3 of the A post (also claiming window post (window pillar) or front pillar (front pillar)) 2 of pair of right and left; Dash shield 4 as the dividing plate of separating car chamber 1 and engine room ER; The free bearing tower (hinge tower) 5 that extends downwards from A post 2.
Dash shield 4 is arranged on the bottom of car neck 3, and the side edge part about it connects the free bearing tower 5 of pair of right and left respectively.On the free bearing tower 5, be provided with the body hinge (door hinge) that the front side door of pair of right and left (front side door) (not shown) is supported in switching freely.
The left and right sides sidepiece of engine room ER, the front side member 9 of the pair of right and left of be provided with respectively the baffle portion (also claiming wheel cowl (wheel house) or wheel shield) 8 of baffle component 7, baffle component 7 bottoms of the pair of right and left of extending to vehicle body the place ahead from the connecting portion of the A post 2 of pair of right and left and free bearing tower 5, extending to vehicle body the place ahead.The baffle component 7 of pair of right and left, be positioned at the overall width direction outside of front side member 9, outstanding to vehicle front, it is about 1/3 of an engine room ER fore-and-aft direction length from the length that above-mentioned connecting portion extends to vehicle body the place ahead, shorter than common baffle component, try hard to lightness.
Front side member 9 is forwards outstanding from the dash shield 4 of car neck 3 belows.Front side member 9 is connected with to engine room ER one side protuberance, accommodates the bottom of the suspension support tower portion 10 (being designated hereinafter simply as suspension support tower 10) of front wheel suspension shock absorber (suspension damper).
In addition, suspension support tower 10 engages with baffle component 7, and thus, front side member 9 and baffle component 7 are joined together.In addition, at the position, the place ahead of suspension support tower 10, baffle component 7 is connected by baffle portion 8 with front side member 9, and this baffle portion 8 covers the place ahead of suspension support tower 10 and the position between the front side member 9.
In the left and right sides of vehicle body, the upper end of the spring strut of each suspension front-wheel front suspensions (frontsuspension) such as (suspension strut) is installed on the top 10a of suspension support tower 10 respectively.In addition, the bottom of above-mentioned spring strut etc. is supported on lower arm part (lower arm) and goes up (all not shown).
The leading section of the front side member 9 of pair of right and left links to each other with the bumper reinforcement (bumper reinforment) 12 that extends along the overall width direction by crumple box (crash can) 11.Crumple box 11 is formed with a plurality of slotted hole 11a of portion (with reference to Fig. 3) in side surface part, makes the crumple box 11 easy structures of crumple in the axial direction when vehicle is freeed head-on crash to be formed in, to absorb collision load.Not shown bumper/spoiler (bumper) is installed on this bumper reinforcement 12.The collision load of importing through bumper reinforcement 12 when crumple box 11 absorbs vehicle generation head-on crash.
The space that is surrounded by front side member 9 of dash shield 4, pair of right and left etc. is engine room ER.In this engine room ER, the driving engine E that represents with a long and short dash line among Fig. 2, change-speed box (transmission) M equal power device P, be horizontally set (bent axle or eccentric shaft extend along the overall width direction) state, its sidepiece is suspended in the driving engine department of assembly 13, is subjected to the support of front side member 9 thus.
Driving engine department of assembly 13 shown in Fig. 1 etc. comprises that covering roughly is the urceolus 13a of the periphery of rubber components cylindraceous (rubber) (not shown), is equipped with the mounting bracket 13b of embedded hole 13c and bolt hole 13d, the outstanding bolt 13e from the center of urceolus 13a.
Mounting bracket 13b is a plate-shaped member, is positioned at its central part corresponding to the embedded hole 13c of urceolus 13a size dimension, urceolus 13a can embed among this embedded hole 13c and with its formation one.
Driving engine department of assembly 13 is fixed on the bottom by on the installation portion 15 (being designated hereinafter simply as installation portion 15) that welds the case shape driving engine department of assembly that engages with front side member 9.Particularly, the mounting bracket 13b of driving engine department of assembly 13 is fixed on the upper side of installation portion 15 by bolt 16.
Installation portion 15 can be bent into the case shape by 1 sheet metal and be formed, and its bottom is formed with and is used for a plurality of flange 15a, 15a, the 15b that engage with front side member 9.
Flange 15a, the 15a of the front end face of installation portion 15, aft end face are bent into L shapedly, and are bonded on the position that is positioned at suspension support tower 10 the place aheads in front side member 9 upper sides, so that driving engine department of assembly 13 is arranged on the place ahead of suspension support tower 10.On the other hand, the flange 15b of engine room ER one side, mutually continuous with the side of installation portion 15, and be bonded on the side of front side member 9.
Like this, because the bottom of installation portion 15 engages respectively with the upper side and the side of front side member 9, therefore, installation portion 15 has the higher rigidity of resisting the torsional direction load, but also the load dispersing that acts on installation portion 15 can be delivered to a plurality of faces of front side member 9.
Installation portion 15, as Fig. 1～shown in Figure 3, face roughly is horizontal-extending on it, and its front and rear end side are formed with flange 15c, 15c, the outer distolateral flange 15d that extends upward that is formed with of its overall width direction.By above-mentioned flange 15c, 15c, 15d, installation portion 15 engages with the baffle portion 8 in the overall width direction outside, the front face of suspension support tower 10.
Here, because installation portion 15 is the case shape, and has certain height, therefore can correspondingly make driving engine department of assembly 13 be positioned at the position of front side member 9 top H height as shown in Figure 3.Thus, can be set in higher position, to suppress the vibration of engine installation P with comprising the Support Position of driving engine E at interior engine installation P.
As everyone knows, by improving the Support Position of engine installation P, can suppress the transmission of the vibration of driving engine E to vehicle body.Therefore, by the installation portion 15 of case shape, can improve NVH (the Noise Vibration Harshness) performance of engine installation P.
In addition, be positioned at the front face of the suspension support tower 10 at installation portion 15 (driving engine department of assembly 13) rear, be provided with gusset (gusset) parts 17 that extend to the bottom from the top of suspension support tower 10.These gusset parts 17 have seeing to oblique rear roughly linearly bevelled rake 17a from the side-looking direction as shown in Figure 3 and the place ahead extension 17b that engages with installation portion 15.In addition, these gusset parts 17, with installation portion 15, be positioned at the position in the place ahead of driving engine department of assembly 13 in the top 10a of formation straight line connection suspension support tower 10 and the front side member 9, see the frame parts (being equivalent to the 1st transom of the present invention) 22 that overlaps with driving engine department of assembly 13 from overlooking direction.
In addition, the rear of suspension support tower 10, be provided with the transom (being equivalent to the 2nd transom of the present invention) 18 of linearly extension on the vehicle fore-and-aft direction, with top 10a that connects suspension support tower 10 and the side end that is positioned at front side plate (front panel) 3a of the car neck 3 at its rear.This transom 18 as shown in Figure 1, is the prismatic member that is shaped by with light-alloy castings such as aluminium, and its leading section 18a is fixedly connected on suspension support tower top 10a, and end 18b is fixedly connected on the front face (with reference to Fig. 7 and Fig. 8) of car neck 3 thereafter.
Below, according to the cutaway view shown in exploded perspective view shown in Figure 4, Fig. 5 (a) and (b), the mounting structure of installation portion 15 and gusset parts 17 is described.
Installation portion 15, face is formed with opening 15e on it, can embed the urceolus 13a of driving engine department of assembly 13 among this opening 15e, and the bottom of driving engine department of assembly 13 is contained in the space that is surrounded by installation portion 15, baffle portion 8, front side member 9.Bolt 16 passes the bolt hole 13d, the 13d that are worn on the mounting bracket 13b of driving engine department of assembly 13 and last facial formed bolt hole 15f, the 15f of installation portion 15, and driving engine department of assembly 13 is fixed on assigned position.
Opening 15e, rounded corresponding to the shape of urceolus 13a.Like this,, therefore, can separate the hot gas of engine room ER (with reference to Fig. 1 etc.), avoid the infringement of this hot gas with protection urceolus 13a in-to-in rubber components because the position that is contained in the installation portion 15 among the urceolus 13a is roughly sealed.
In addition, when vehicle generation head-on crash,,, produce because of what this engine installation P backward movement was brought and retreat energy also at engine installation P (with reference to Fig. 2) except that there being collision load to act on the front side member 9.This engine installation P is produced retreats energy, is delivered to front side member 9 by driving engine department of assembly 13.
Shown in this first embodiment, the installation portion 15 of case shape is fixed in driving engine department of assembly 13, and the bottom of this installation portion 15 engages with front side member 9 in many places by flange 15a, 15b, load dispersing can be arrived many places such as flange 15a, 15a, 15b thus.Like this, the installation portion 15 that can prevent the driving engine department of assembly takes place damaged, therefore can be effectively with the above-mentioned transfer of energy that retreats to front side member 9.
As everyone knows, the mounting structure of the installation portion of driving engine department of assembly in the past, comprising lower end many foots with certain-length and this foot are set and are fixed on structure on the front side member at installation portion, even the structure of the case shape installation portion 15 of this first embodiment is also highly beneficial at the above-mentioned structure that is provided with foot.
In addition, because installation portion 15, face roughly is horizontal-extending and engages with baffle portion 8 on it, thereby retreat energy and the vibrational loading of driving engine E when travelling usually can be with head-on crash the time, not only dispersion is delivered to front side member 9 but also disperses to be delivered to baffle portion 8, therefore, can improve the rigidity of support of 15 pairs of driving engine departments of assembly 13 of installation portion of driving engine department of assembly.
In addition, installation portion 15, by engaging with baffle portion 8, therefore, shown in Fig. 5 (a) (cutaway view of the A-A line direction of arrow among Fig. 1), itself and baffle portion 8 and front side member 9 form closed sectional structures 19.By this closed sectional structure 19, can further improve rigidity of support to driving engine department of assembly 13.
In addition, because the flange 15c of installation portion 15 by rear end side shown in Figure 4 engages with the front face of suspension support tower 10, therefore, engine installation P's retreats energy in the time of can be with vehicle generation head-on crash, not only disperse to be delivered to the front side member 9 of body bottom section, also disperse to be delivered to suspension support tower 10.Like this, owing to the burden that retreats the front side member 9 that transmission of energy causes can be alleviated, therefore, can realize the energy absorbing that is undertaken by the axial compression of front side member 9 effectively.
In addition, the aft end face of installation portion 15 engages with the bottom of gusset parts 17 by welding.The bottom of gusset parts 17 constitutes the place ahead extension 17b that extends to installation portion 15, and the front end of this place ahead extension 17b is formed with the aft end face flange 17c in opposite directions with installation portion 15, and this flange 17c engages with above-mentioned aft end face.
Gusset parts 17, section is hat, and its two ends, left and right sides are formed with the flange 17d that extends along above-below direction.In addition, the upper end of gusset parts 17, the top 10a that is formed with suspension support tower 10 roughly is positioned at conplane flange 17e.Gusset parts 17, with above-mentioned each flange 17d, 17e, engage with the front face of suspension support tower 10 by welding, front face at suspension support tower 10, shown in Fig. 5 (b) (cutaway view of the B-B line direction of arrow among Fig. 1), form continuous closed sectional structure 20 from top to the bottom of suspension support tower 10.
Like this, because gusset parts 17 engage with installation portion 15 and suspension support tower 10, therefore, driving engine department of assembly 13 by installation portion 15, is connected with the bottom of gusset parts 17, is connected with the top 10a of suspension support tower 10 thus.In addition, the said frame parts 22 that gusset parts 17 and installation portion 15 are constituted, straight line connect the position that is positioned at the place ahead of driving engine department of assembly 13 in the top 10a of suspension support tower 10 and the front side member 9, see with driving engine department of assembly 13 and overlap from overlooking direction.
Thus, when vehicle generation head-on crash, can make the energy that retreats of engine installation P, be delivered to body top section effectively via top, the baffle component 7 of suspension support tower 10.That is,, can make the above-mentioned energy that retreats, not only disperse to be delivered to the front side member 9 of body bottom section, also disperse to be delivered to body top section by gusset parts 17.
Therefore, the influence that is brought that retreats of engine installation P is delivered to body top section by with vehicle generation head-on crash the time, can alleviate the burden of front side member 9, realizes the energy absorbing that is undertaken by the axial compression of front side member 9 effectively.
In addition, in this first embodiment, the rearward end of installation portion 15 is engaged in the front face of gusset parts 17 by flange 17c, thereby driving engine department of assembly 13 is connected with gusset parts 17 through installation portion 15.Thus, can alleviate the above-mentioned burden that energy band is given front side member 9 that retreats more effectively more effectively with the above-mentioned top that retreats transfer of energy to suspension support tower 10.
But, with engine installation P retreat transfer of energy to the top of suspension support tower 10 time, not necessarily require installation portion 15 and gusset parts 17 to engage.For example, the rearward end of installation portion 15 also can be only and the anterior end butt of gusset parts 17.In addition, can estimate that also installation portion 15 produces the possibility that retreats because of the above-mentioned effect that retreats energy when vehicle generation head-on crash, between the anterior end of the rearward end of installation portion 15 and gusset parts 17, can make when forming vehicle generation head-on crash installation portion 15 effectively with the minim gap of gusset parts 17 butts.
Gusset parts 17, as mentioned above, section is the cap shape, thereby under the state that the front face with suspension support tower 10 engages, and shown in Fig. 5 (b), forms closed sectional structure 20 with the front face of suspension support tower 10.Like this, utilize the suspension support tower 10 that is set at high stiffness for draft hitch is installed to constitute closed sectional structure 20, can further improve the rigidity of gusset parts 17.
In addition, section is the gusset parts 17 of cap shape, as shown in Figure 4, the bottom of its place ahead extension 17b is open state, but in order to form the closed sectional structure, the both sides of extension 17b also form flange 17f forwardly, and cover above-mentioned open portion by base plate part 21, form continuous closed sectional structure thus.At this moment, the front side of plate-shaped member 21 is formed with flange 21a, and this flange 21a engages with the aft end face of installation portion 15 by welding.
But, among the present invention, not necessarily require to form closed sectional structure 20 by gusset parts 17.For example, also can engage with the installation portion 15 (driving engine department of assembly 13) of driving engine department of assembly, the top 10a of suspension support tower 10 respectively,, constitute gusset parts 17 thus to constitute bridge shape frame parts by two ends.At this moment, though do not form the closed sectional structure by the gusset parts, also can be by this frame parts with the above-mentioned top 10a that retreats transfer of energy to suspension support tower 10.
Gusset parts 17, as mentioned above, have from the side-looking direction and see to oblique rear roughly linearly bevelled rake 17a, this be because, if being set among Fig. 6 with L shaped shown in the long and two-short dash line, gusset parts 17 roughly when vertical direction is extended, above-mentionedly retreat the top 10a that energy can't be delivered to suspension support tower 10.In other words, if as this first embodiment, gusset parts 17 have rake 17a, the energy that retreats when vehicle generation head-on crash just can be shown in the arrow X of solid line and above being directed to so, is delivered to baffle component 7 via the top of suspension support tower 10.
Be delivered to the above-mentioned energy that retreats on the top of suspension support tower 10 from engine installation P through installation portion 15 and gusset parts 17, also, be directly delivered to car neck 3 by the transom 18 shown in Fig. 7, Fig. 8 etc.
Fig. 7 is the originally cutaway view of the connection structure on suspension support tower 10 tops of first embodiment of expression.Suspension support tower 10, the inside of the hollow cylindrical main part 10b that wherein is closed in the upper end, be provided with the seat portion 31 that supports coil spring (coil spring) SP that constitutes front suspension, its substantial middle position is formed with through hole 33, can run through the not shown shock-absorber shaft that is provided with via rubber bush (gum bush) 32 grades in this through hole 33.The upper end of this main part 10b is fixed with the discoid strengthening part 10c that erect the outer edge by bolt 34 grades, to constitute suspension support tower top 10a.Roughly in the form of a ring closed sectional structure of formation is seen from overlooking direction, to improve rigidity in the space 36 that forms by main part 10b and strengthening part 10c.The lateral surface of strengthening part 10c is formed with the part and is eliminated into plane part, and the leading section 18a of transom 18 is fixed on the above-mentioned part that eliminates by bolt 35 grades.
Car neck 3 as shown in Figure 8, is overlapped and form with rear quarter panel (rear panel) 3b by the front side plate 3a that forms by the sheet material bending, thereby the side edge part of intersection is engaged the closed sectional structure that formation has high stiffness by welding etc.In addition, dash shield 4 is made of superposed epipleural (upper panel) 4a and lower side panel (lower panel) 4b that is positioned at the bottom, and epipleural 4a and lower side panel 4b link together by bolt etc.The rising wood of epipleural 4a is connected with the lower edge of car neck 3 by bolt etc.In addition, the front side plate 3a of car neck 3 is connected with the rearward end 18b of transom 18.
The structure of the fastening part of transom 18 and suspension support tower top 10a, particularly, as shown in Figure 7, the fastening flange 18A of the leading section 18a of transom 18 is fixed in the closed sectional mechanism 36 that is made of above-mentioned strengthening part 10c and main part 10b by bolt 37 and captive nut 35.
In addition, the structure of the fastening part of transom 18 and car neck 3 as shown in Figure 8, is arranged on the fastening flange 18B of the rearward end 18b of transom 18, is fixed on the front face (front side plate 3a) of car neck 3 by bolt 38 and clamp nut 39.
Like this, suspension support tower 10 and car neck 3 are connected by the transom 18 that extends along the vehicle fore-and-aft direction, therefore, be delivered to the above-mentioned energy that retreats of the top 10a of suspension support tower 10, also disperse to be delivered to car neck 3, thereby can improve the collision performance of vehicle effectively.
Therefore, can be effectively by frame parts to the body top section load diversity, with the energy absorbing of realizing more effectively being undertaken by the axial compression of front side member 9.
(second embodiment)
In above-mentioned first embodiment, be provided with installation portion 15 and gusset parts 17, and make the top 10a that energy also disperses to be delivered to suspension support tower 10 that retreats of engine installation P, but not necessarily be confined to this by them.For example, among the present invention, also can replace the installation portion 15 and the gusset parts 17 of driving engine department of assembly, and the single part that has both functions concurrently (gusset parts 117) as shown in Figure 9 is set, constitute frame parts 22 with these gusset parts 117.
Fig. 9 is the block diagram of wanting portion that expression relates to the vehicle body front structure of this second embodiment, Figure 10 is the exploded perspective view of wanting portion that expression relates to the vehicle body front structure of this second embodiment, and Figure 11 (a), 11 (b) are respectively the cutaway view of the C-C line direction of arrow among Fig. 9, the cutaway view of the D-D line direction of arrow.In this second embodiment, the part identical with above-mentioned first embodiment paid identical symbol, omit its explanation.
Gusset parts 117 as shown in figure 10, are the case shape, have from the side-looking direction to see to the roughly linearly bevelled in the oblique rear facial 117a that tilts, and the side surface part of shape triangular in shape roughly.In addition, gusset parts 117, its bottom engages with going up of baffle portion 8 and front side member 9 is facial, and the end engages with the front face of suspension support tower 10 thereafter.
The overall width direction both sides and the front side of gusset parts 117 bottoms are formed with a plurality of flange 117b, 117b, 117c, engage with the bottom of baffle portion 8 and the face of going up of front side member 9 by welding.
The rearward end of gusset parts 117 in overall width direction both sides, also is formed with a plurality of flange 117b, 117b, engages with the leading section of the suspension support tower 10 that is positioned at gusset parts 117 rears by welding.
In addition, the upper end of the facial 117a of the inclination of gusset parts 117 also is formed with flange 117d, and this flange 117d engages with the top 10a of suspension support tower 10 by welding.
In addition, gusset parts 117, the width that has regulation on the overall width direction is fixed with driving engine department of assembly 113 on the facial 117a that tilts.Particularly, the mounting bracket 113b of driving engine department of assembly 113 is fixed in the facial 117a of inclination of gusset parts 117 by bolt 116.
Shown in Fig. 9, Figure 10 etc., driving engine department of assembly 113 comprises the urceolus 113a that roughly is rubber components cylindraceous (not shown), covers this rubber components periphery, the mounting bracket 113b that is equipped with embedded hole 113c and bolt hole 113d, the bolt 113e that gives prominence to from the center of urceolus 113a.Mounting bracket 113b is integral with urceolus 113a is chimeric, and radially inclined with respect to urceolus 113a.
The dip plane 117a portion of gusset parts 117 is formed with opening 117e, embed the urceolus 113a of driving engine department of assembly 113 among this opening 117e, the bottom of this urceolus 113a is contained in the space that front face surrounded by gusset parts 117, baffle portion 8, front side member 9, suspension support tower 10.Bolt 116 passes the hole portion that the facial 117a of inclination of the bolt hole 113d, the 113d that are worn on the mounting bracket 113b of driving engine department of assembly 113 and gusset parts 117 goes up set nut 117f, 117f, and driving engine department of assembly 113 is fixed on the regulation position.
Therefore, gusset parts 117, identical with the installation portion 15 of first embodiment with gusset parts 17, can make the energy that retreats of engine installation P (with reference to Fig. 2), be delivered to body top section effectively via top, the baffle component 7 of suspension support tower 10.
In addition,, when vehicle generation head-on crash, can make the above-mentioned energy that retreats shown in the arrow Y of solid line among Fig. 9, and guiding top, and be delivered to baffle component 7 via the top of suspension support tower 10 by the facial 117a that tilts.
In addition, because the facial 117a that tilts, shown in Figure 11 (a), form closed sectional structure 120, therefore, can improve the rigidity of gusset parts 117 with the front face and the baffle portion 8 of suspension support tower 10.
In addition, gusset parts 117, a plurality of flange 117b, 117b, 117c by forming in its bottom engage with front side member 9, and also have the function as the installation portion of driving engine department of assembly that driving engine department of assembly 113 is fixed on regulation deployment concurrently.Therefore, both can suppress the increase of number of components, can make a plurality of flange 117b, 117b, the 117c of load dispersing again to overall width direction both sides and front side by gusset parts 117, thus effectively with the above-mentioned transfer of energy that retreats to front side member 9.
In addition, because the facial 117a that tilts extends to the top 10a of suspension support tower 10 upward from front side member 9, therefore, driving engine department of assembly 113 can be set in the position that more is positioned at the top, thereby can improve the NVH performance of engine installation P.
In addition, shown in Figure 11 (b), the bottom of gusset parts 117, not only engage but also engage with baffle portion 8 with front side member 9, therefore, retreat energy and the vibrational loading of driving engine E (with reference to Fig. 2) when travelling usually in the time of can be with vehicle generation head-on crash, not only disperse to be delivered to front side member 9 but also disperse to be delivered to baffle portion 8.
In addition, opening 117e, identical with first embodiment, rounded corresponding to the shape of urceolus 113a.Therefore, the position that is contained in the gusset parts 117 is roughly sealed, can protect urceolus 113a in-to-in rubber components to avoid the hot gas infringement of engine room ER (with reference to Fig. 1 etc.) thus.
In addition, relevant other action effects are identical with first embodiment.
(the 3rd embodiment)
Below, by Figure 12～Figure 18, the structure of the 3rd embodiment is described.Figure 12 is that expression relates to the originally right perspective view of the left part of the vehicle body front structure of the 3rd embodiment, Figure 13 is the left side block diagram of the right side part of this vehicle body front structure of expression, Figure 14 is the exploded perspective view of the left part of this vehicle body front structure, Figure 15 is the birds-eye view of this vehicle body front structure, Figure 16 is the front elevation of the left part of this vehicle body front structure, Figure 17 is the lateral plan during from the left part of inboard this this vehicle body front structure of observation of engine room, Figure 18 (a) is the cutaway view of the E-E line direction of arrow among Figure 16, and Figure 18 (b) is the cutaway view of the F-F line direction of arrow among Figure 16.In addition, among each figure, with the left side of chaufeur as vehicle left side, describe as the vehicle right side with the right side of chaufeur,
The vehicle body front structure of this 3rd embodiment as shown in Figure 1 and Figure 2, comprising: the front side member 9,9 of the pair of right and left of extending to vehicle front from the dash shield 4 of separating car chamber 1 and engine room ER; Be arranged on the crumple box 11,11 of the pair of right and left of these front side member 9,9 front ends; Extend and connect the bumper reinforcement 12 of the front end of above-mentioned crumple box 11,11 along the overall width direction; In engine room ER and in the overall width direction lateral engine room medial eminence of front side member 9,9 and erect the suspension support tower portion 10,10 (following brief note is a suspension support tower 10) of the pair of right and left that is provided with along above-below direction; The baffle component 7,7 of the pair of right and left that is arranged on the upper outside of this suspension support tower 10,10 and extends along the vehicle fore-and-aft direction; Open and be located between baffle component 7,7 and the front side member 9,9 to cover the baffle portion 8,8 of front-wheel (not shown); The A post 2,2 of the pair of right and left of extending along the vertical direction at the rear of baffle component 7,7; The free bearing tower 5,5 that extends along the vertical direction in the bottom of A post 2,2; Between the top of dash shield 4 and free bearing tower 5,5, extend and connect the car neck 3 of the free bearing tower 5,5 of pair of right and left along the overall width direction in pair of right and left.
Above-mentioned front side member 9,9, roughly be the inner panel (inner panel) of cap shape and the joint of outside plate (outer panel) (specifically not shown) by section, form the firm closed sectional structure (with reference to Figure 16) that roughly is quadrangle and extends along the vehicle fore-and-aft direction.By this front side member 9,9, the collision energy of the vehicle fore-and-aft direction that is acted on when overcoming vehicle generation head-on crash.
Above-mentioned crumple box 11,11 is by being provided with frangible portion 11a ... the quadrangle cartridge of (with reference to Figure 17) constitutes, thereby the impact when absorbing vehicle generation head-on crash by the conquassation distortion absorbs collision energy.
Above-mentioned bumper reinforcement 12, the framing member that is " コ " shape by the section that extends setting along the overall width direction constitutes, will be delivered to above-mentioned crumple box 11,11 from the collision energy of vehicle front.In addition, the surface of this bumper reinforcement 12 is equipped with the bumper/spoiler cover (bumper face) (not shown) that extends along the overall width direction.
Above-mentioned suspension support tower 10,10, the cylinder that is bonded on the overall width direction outside of front side member 9,9 by bottom 10d forms, and inside contains the shock absorber of not shown draft hitch etc.And this suspension support tower top 10a is for fixed buffer etc. and adopt firm structure.
Above-mentioned baffle component 7,7, the side rising wood that is positioned at engine room ER forms the closed sectional structure of extending along the vehicle fore-and-aft direction.This baffle component 7 is positioned at outside the overall width direction of suspension support tower 10, is used to overcome the collision load that acts on suspension support tower 10.
Above-mentioned baffle portion 8,8 is formed by the erose plate body that connects front side member 9 and baffle component 7, constitutes the upper portion side wall of engine room ER, plays the dividing plate function of isolating engine room ER outside car.
Above-mentioned A post 2,2 has the closed sectional structure of extending obliquely upward from the back-end location of baffle component 7,7, extends upward towards not shown top board (roof panel) thus.
Above-mentioned free bearing tower 5,5 is positioned at the bottom of A post 2,2, extends along the vertical direction, constitutes the anterior sidewall of car chamber 1.The rear end of this free bearing tower 5,5 is provided with the turning joint of not shown driver door (front door).
Above-mentioned car neck 3 has along the closed sectional structure of overall width direction bending extension, with the upper bond (with reference to Figure 17) of dash shield 4, to improve the rigidity of car chamber upper front end.In addition, the dash shield 4 along the overall width direction is extended is made of epipleural 4a and lower side panel 4b.
In this 3rd embodiment,, also be provided with, connect the bridge shape frame parts (being equivalent to the 1st transom of the present invention) 23,22 of front side member 9 and suspension support tower top 10a for improving the collision performance of front-body structure; The transom 18,18 that connects suspension support tower top 10a and car neck 3; The suspension support tower connecting rod (suspension tower bar) 27 that connects the suspension support tower top 10a of pair of right and left.
At first, the frame parts 23 in left side in the bridge shape frame parts 23,22, as shown in figure 14, what comprise that circumference is provided with that a plurality of faying flange 24a, 24b, 24c, 24d and section be " コ " shape sees support roughly triangular in shape 24 from the side-looking direction, and bend to 25 of circular-arc liner plates, this liner plate 25 engages with the bottom 24e that roughly is cut into semicircle shape of support 24, with the part of the downside of closed supports 24.
The bridge shape frame parts 23 in this left side is formed with from the side-looking direction and sees that from the top to the below its side is formed with erects longitudinal wall face 23b, the 23b that is provided with along the vertical direction towards oblique the place ahead bevelled facial 23a that tilts.And its underpart, rear portion base portion (being equivalent to the 2nd base portion of the present invention) 24B that is provided with anterior base portion (being equivalent to the 1st base portion of the present invention) 24A that engages with the front portion of front side member 9 and engages with the rear portion, these two base portion 24A, 24B connect together by longitudinal wall face 23b, form from the side-looking direction and see that the bottom roughly is cut into the 23c of cross-over connection portion of semicircle shape.
This bridge shape frame parts 23 as shown in figure 12, extends along above-below direction in the place ahead of suspension support tower 10, is arranged on simultaneously on the front side member 9 to cross over the No.4 described later M4 of department of assembly.Promptly, it is facial that the faying flange 24a of the upper end of bridge shape frame parts 23 is engaged in going up of suspension support tower top 10a, simultaneously, the faying flange 24b at rear portion is engaged in the side wall surface 10e of suspension support tower 10 along above-below direction, in addition, the faying flange 24c of anterior base portion 24A is bonded on the position that is positioned at M4 the place ahead, No.4 department of assembly in the front side member 9, the faying flange 24d of rear portion base portion 24B is bonded on the position that is positioned at M4 rear, No.4 department of assembly in the front side member 9, thereby, form along the crash-resistant closed sectional structure of above-below direction and fore-and-aft direction extension in the place ahead of suspension support tower 10.Like this,, be positioned at the position in M4 the place ahead, No.4 department of assembly in the top 10a of straight line connection suspension support tower 10 and the front side member 9, see with the M4 of No.4 department of assembly overlapping from overlooking direction by the frame parts 23 in left side.
Figure 18 (a) is the cutaway view of the E-E line direction of arrow among Figure 16.Shown in Figure 18 (a), on the top of frame parts 23, faying flange 24b, the 24b of longitudinal wall face engages with the side wall surface 10e of suspension support tower 10, thereby forms closed sectional structure R with the side wall surface 10e of suspension support tower 10, to guarantee the rigidity of frame parts 23.Particularly, utilize the side wall surface 10e of suspension support tower 10 to form closed sectional structure R, can utilize the rigidity of the higher rigidity raising frame parts 23 of suspension support tower 10.
In addition, shown in the section-drawing of Figure 18 (b), bottom at frame parts 23, rear portion base portion 24B forms closed sectional structure T by side wall surface 10e, longitudinal wall face 23b, the liner plate 25 of suspension support tower 10, anterior base portion 24A also forms closed sectional structure U by liner plate 25, longitudinal wall face 23b, dip plane 23a, thereby makes the bottom of frame parts 23 also have strong design.
On the other hand, the frame parts 22 on right side, as shown in figure 13, with first embodiment same structure is arranged, section with the place ahead that is arranged on suspension support tower 10 is the gusset parts 17 of " コ " shape and is arranged on the installation portion 15 (following brief note is an installation portion 15) of the case shape driving engine department of assembly in this gusset parts the place ahead.Gusset parts 17 are engaged in the front face of suspension support tower 10, form the closed sectional structure of extending along above-below direction with the side wall surface 10e of suspension support tower 10.Installation portion 15 is equipped with the M3 of aftermentioned No.3 department of assembly with driving engine department of assembly 13 same structures of first embodiment.By the frame parts 22 on right side, be positioned at the position in M3 the place ahead, No.3 department of assembly in the top 10a of straight line connection suspension support tower 10 and the front side member 9, see with the M3 of No.3 department of assembly overlapping from overlooking direction.
The frame parts 23,22 of above-mentioned pair of right and left as shown in figure 15, from overlooking direction, little by little roughly is being obliquely installed of " Ha " shape to the expansion of the overall width direction outside from vehicle front to rear view of vehicle.
In addition, the fore-and-aft direction central part of the front side member 9,9 of pair of right and left shown in single-point line, is provided with the M3 of driving engine department of assembly, the M4 of the engine installation P of the horizontally set that support is made of driving engine E, change-speed box M etc.Wherein, serve as reasons and be arranged on the M3 of No.3 department of assembly that the cylindrical shape department of assembly on the above-mentioned installation portion 15 is constituted in the right side, and the M4 of No.4 department of assembly that the quadrangle department of assembly of the below that is arranged on said frame parts 23 is constituted serves as reasons in the left side.
Particularly, the M4 of No.4 department of assembly as shown in figure 17, between the anterior base portion 24A and rear portion base portion 24B of frame parts 23, directly is fixed on the front side member 9 by mounting bracket 26, at relatively low position supporting motive force device P.
The M4 of No.4 department of assembly as above is set, position above it, linearity ground extends bridge shape frame parts 23 is set on the vehicle fore-and-aft direction, connects the front portion of front side member 9 and the position of suspension support tower top 10a thereby obtain straight line.Thus, can utilize the stronger axial stiffness of the linearity at this position, need not to produce the crooked collision energy that can will act on front side member 9 and disperse to be delivered to suspension support tower top 10a.
Below, the structure of the bonding part of suspension support tower top 10a and frame parts 23 is described.
The structure of relevant suspension support tower 10 has been described in detail with reference to Fig. 7 in the first embodiment, omits its explanation at this.The faying flange 24a of frame parts 23 upper ends, identical with gusset parts 17 shown in Figure 7, engage and be fixed in suspension support tower top 10a, thereby frame parts 23 is fixed in suspension support tower top 10a.
In addition, relevant above-mentioned transom 18, identical with the explanation in first embodiment, its leading section 18a is fixed in suspension support tower top 10a, and end 18b is fixed in the front face (with reference to Fig. 7 and Fig. 8) of car neck 3 thereafter.
In addition, above-mentioned suspension support tower connecting rod 27 as shown in figure 12, is to be shaped and to have the prismatic member of certain-length with light-alloy castings such as aluminium, is extending suspension support tower top 10a, the 10a that is provided with about connecting on the overall width direction.This suspension support tower connecting rod 27 is also identical with above-mentioned transom 18,18, is fixed in by bolt and captive nut to be reinforced the suspension support tower top 10a that parts 10c strengthens and to go up (specifically not shown).
Below, with regard to the vehicle body front structure of above-mentioned the 3rd embodiment state when the vehicle generation head-on crash, overlook mode chart illustrated by Figure 19 to Figure 22.Before Figure 19 represented head-on crash, Figure 20 represented the head-on crash initial stage, and Figure 21 represents head-on crash mid-term, and Figure 22 represents the head-on crash later stage, to each component part, pays the symbol identical with above-mentioned Figure 12～Figure 18 and omits its explanation.
From just hitting the initial stage to just hitting mid-term, safety lever reinforcement 12 retreats, crumple box 11,11 conquassation distortion, and the collision energy at collision initial stage is absorbed.In addition, because frame parts 23,22 disperses to be delivered to suspension support tower top 10a, 10a with the collision energy of front side member 9,9, therefore can relax collision energy and concentrate on situation on the front side member 9,9.Particularly, because therefore frame parts 23 supporting motive force device P not, is positioned at the frame parts 23 in left side, collision energy can be directly delivered to suspension support tower top 10a.In addition, in this stage, collision energy mainly is delivered to suspension support tower top 10a by anterior base portion 24A.
Collision from just hit enter mid-term just hitting the later stage after, the energy that retreats of the collision energy of front side member 9,9 and engine installation P just is delivered to suspension support tower top 10a, 10a from frame parts 23,22.At this moment, the energy that retreats of engine installation P just begins to act on the frame parts 23 that is positioned at the left side through rear portion base portion 24B, retreats energy thus and just is delivered to suspension support tower top 10a.In addition, above-mentioned energy also disperses to be delivered to car neck 3 etc. through transom 18,18.
If collision is further carried out, suspension support tower top 10a, 10a just bear the load from frame parts 23,22, to the outside displacement of overall width direction.That is,, frame parts 23,22 is " Ha " shape because being provided with, therefore, and the load that suspension support tower top 10a, 10a are subjected to from inside to outside acting on, and to the outside displacement of overall width direction.
Because the displacement of this suspension support tower top 10a, 10a, just there is one along the overall width direction that is act on the suspension support tower connecting rod 27 of the suspension support tower top 10a, the 10a that connect pair of right and left along the load of the axial tension of suspension support tower connecting rod 27, therefore, suspension support tower connecting rod 27 produces plastic deformation because of this stretching.
In addition, the displacement of this suspension support tower top 10a, 10a, when the input direction of collision loads such as offset collision changes, also may be to the inboard generation of overall width direction.At this moment, the load of axial compression direction acts on suspension support tower connecting rod 27, and suspension support tower connecting rod 27 just produces plastic deformation along compression direction.
In addition, as mentioned above, be positioned at the frame parts 23 in left side,, therefore can make suspension support tower top 10a that the displacement of overall width direction takes place more energetically owing to be directly delivered to suspension support tower top 10a from the collision energy of vehicle front side.
Like this, owing to can make the collision energy that produces on the front side member 9,9, be distributed to the suspension support tower top 10a, baffle component 7,7, car neck 3 of body top section and even the suspension support tower connecting rod 27 that extends along the overall width direction and absorbed, therefore can suppress front side member 9,9 and produce the bending distortion, and make front side member 9,9 that axial compressive deformation take place.
Below, be elaborated with regard to the action effect of basis the 3rd embodiment of said structure.But, because the action effect of the frame parts 22 on right side is illustrated in the first embodiment, therefore, below mainly the action effect of the frame parts 23 in left side is illustrated.
At first, in this 3rd embodiment, the M4 of No.4 department of assembly of supporting motive force device P is arranged on the position that is positioned at the place ahead of suspension support tower 10 in the front side member 9, bridge shape frame parts 23 connects the position that is positioned at the place ahead of the M4 of No.4 department of assembly in suspension support tower top 10a and the front side member 9, and the frame parts 23 of this bridge shape is seen the overlapping and extension above it with the M4 of No.4 department of assembly from overlooking direction.
Like this,, can not be subjected to the influence of the M4 of this No.4 department of assembly yet, thereby can transmit collision load by bridge shape frame parts 23 even the M4 of No.4 department of assembly is arranged on the front side member 9.
Therefore, need not to change the strong point (driving engine department of assembly be provided with position) of engine installation P, just can pass through bridge shape frame parts 23, the collision energy that will act on front side member 9 effectively is delivered to suspension support tower top 10a.
Therefore, be delivered in the vehicle body front structure of body top section at the collision load that will act on front side member 9, even the driving engine department of assembly is arranged on front side member 9, also can effectively collision load be distributed to body top section and produce warpage upward, realize the energy absorbing that is undertaken by the axial compression of front side member 9 to suppress front side member 9 by frame parts 23.
In addition, in this 3rd embodiment, because the place ahead at the strong point of engine installation P, promptly at the position, the place ahead that the position is set of the M4 of No.4 department of assembly, load dispersing is arrived body top section, therefore, the rigidity at position that need not to reduce the rear of the strong point that is positioned at engine installation P in the front side member 9 improves the impact absorption performance.Therefore, can improve the frame rigidity of the strong point of engine installation P by node support etc. is set in inside, to improve the rigidity of support of engine installation P.
In addition, in this 3rd embodiment, bridge shape frame parts 23 forms the closed sectional structure R that extends along the vertical direction with the side wall surface 10e of suspension support tower.
Thus, framework 23 can utilize the higher suspension support tower 10 of rigidity to improve rigidity.
Therefore, even bigger collision energy also can be delivered to suspension support tower top 10a effectively.
In addition, in this 3rd embodiment, bridge shape frame parts 23 is provided with anterior base portion 24A and rear portion base portion 24B, by this front portion base portion 24A and rear portion base portion 24B, can make bridge shape frame parts 23 cross over the No.4 M4 of department of assembly.
Thus, when the relatively lighter collision of collision happens degree, only there is collision energy to be delivered to suspension support tower top 10a from anterior base portion 24A, and when the relatively heavier collision of collision happens degree, the energy that retreats of engine installation P is delivered to suspension support tower top 10a from rear portion base portion 24B.
Like this, can the energy that be delivered to suspension support tower top 10a be changed by the weight of collision degree, the load transmission that implementation efficiency is higher be by bridge shape frame parts 23 load diversity more effectively.
In addition, in this 3rd embodiment, the anterior base portion 24A of bridge shape frame parts 23 and rear portion base portion 24B, by seeing that from the side-looking direction central position roughly is cut into the 23c of cross-over connection portion of semicircle shape and constitutes, the below of the 23c of this cross-over connection portion is provided with the M4 of No.4 department of assembly.Like this, can make anterior base portion 24A and rear portion base portion 24B form one, make the closed sectional structure of framework 23 bottoms bigger.Therefore, can improve the rigidity of the bottom of framework 23, make it to transmit effectively the load of collision energy.
In addition, in this 3rd embodiment, about be formed with front side member 9 and suspension support tower 10 respectively, and frame parts about 23,22 is provided with in pairs, this frame parts 23,22, be arranged to from overlooking narrower " Ha " shape of spacing that direction is seen vehicle the place ahead one side end, suspension support tower top 10a connects by the suspension support tower connecting rod 27 that extends along the overall width direction.
Thus, act on the collision load of front side member 9, can be because of " Ha " shape setting of frame parts 23,22, and make suspension support tower top 10a produce displacement to the overall width direction outside, the displacement of this overall width direction, suspension support tower connecting rod 27 is produced along the overall width direction, that is along the axial plastic deformation of suspension support tower connecting rod 27.
Like this, utilize existing being used to improve the operational stability of vehicle and the suspension support tower connecting rod 27 that is provided with, but dispersing action is in the collision energy of front side member 9.Therefore, need not to set new reinforcement unit, just can absorb collision energy at body top section.
Below, by Figure 23, Figure 24, the structure of the variation of the 3rd embodiment is described.In this variation, the frame parts 23 that is made of main frame 101 that extends to the front lower place linearity and the sub-frame 102 that is skewed setting is set by the place ahead at suspension support tower 10, replacing the support 24 in above-mentioned the 3rd embodiment, thereby collision energy that will act on front side member 9 etc. is delivered to suspension support tower top 10a.Here,, pay the symbol identical, omit its explanation with first embodiment to other identical component part.
Said frame parts 23 as shown in figure 24, comprise by engaging section being the support 101A of " コ " shape and main frame 101 that liner plate 101B constitutes and the tabular sub-frame 102 that forms by bending upper end flange 102a and lower end flange 102b.
Wherein, main frame 101, its leading section 103 is bonded on the position in the place ahead that is positioned at the M4 of No.4 department of assembly in the front side member 9, and rearward end 104 is engaged in suspension support tower top 10a, thereby is erected between front side member 9 and the suspension support tower top 10a.In addition, sub-frame 102, its upper end flange 102a is engaged in the downside central part of main frame 101, and lower end flange 102b is bonded on the position at the rear that is positioned at the M4 of No.4 department of assembly in the front side member 9.
Constitute frame parts 23 like this, identical with above-mentioned the 3rd embodiment, both can avoid interfering with the driving engine department of assembly, can be delivered to suspension support tower top 10a by the collision energy etc. that main frame 101 will act on front side member 9 again.In addition, when the heavier collision of the degree of bumping, engine installation P retreats energy and also can disperse be delivered to suspension support tower top 10a by sub-frame 102.
So one, identical with above-mentioned the 3rd embodiment, can make collision load be distributed to body top section effectively, suppress front side member 9 and produce warpage upward, realize the energy absorbing that is undertaken by the axial compression of front side member 9.
In addition, owing to can make the energy that retreats of engine installation P also be delivered to suspension support tower top 10a by the weight of collision degree, but the therefore higher load transmission of implementation efficiency.
Particularly, as this variation, constitute frame parts 23, frame parts 23 is shaped easily, enhance productivity by main frame 101 and sub-frame 102.
In addition, compare with above-mentioned the 3rd embodiment, owing to can guarantee the lower space of bigger framework 23, therefore, the M4 of No.4 department of assembly just can easily be set on the front side member 9, thereby improves the efficiency of assembling that comprises engine installation P.
Other action effects are identical with above-mentioned the 3rd embodiment.
In addition, the present invention is not limited to the respective embodiments described above, and it comprises the embodiment that is applicable to all vehicle body front structures.

Claims (9)

1. vehicle body front structure is characterized in that:
Comprise,
Front side member, outstanding from dash shield to vehicle front;
Baffle component is positioned at outside the overall width direction of above-mentioned front side member, and is outstanding to vehicle front;
Suspension support tower portion engages with above-mentioned baffle component and above-mentioned front side member, and to the engine room protuberance, to accommodate the front wheel suspension shock absorber;
The driving engine department of assembly is arranged on the top at the position that is positioned at above-mentioned suspension support tower portion the place ahead in the above-mentioned front side member, is used for the sidepiece of supporting motive force device;
The 1st transom, straight line connect the position that is positioned at the place ahead, above-mentioned driving engine department of assembly in the top of above-mentioned suspension support tower portion and the above-mentioned front side member, see with above-mentioned driving engine department of assembly and overlap from overlooking direction.
2. vehicle body front structure according to claim 1 is characterized in that:
Above-mentioned driving engine department of assembly is installed on above-mentioned the 1st transom,
Above-mentioned the 1st transom, making of being produced during with the vehicle generation head-on crash transfer of energy that above-mentioned engine installation retreats is to the top of above-mentioned suspension support tower portion.
3. vehicle body front structure according to claim 2 is characterized in that:
Above-mentioned the 1st transom comprises,
The gusset parts, the front face in above-mentioned suspension support tower portion is extended to the bottom from the top of this suspension support tower portion;
The installation portion of driving engine department of assembly engages with the front portion of above-mentioned gusset parts, supports above-mentioned driving engine department of assembly;
The front face of above-mentioned gusset parts and above-mentioned suspension support tower portion forms the closed sectional structure.
4. vehicle body front structure according to claim 3 is characterized in that:
Also comprise, connect the baffle portion of above-mentioned baffle component and above-mentioned front side member at the position, the place ahead of above-mentioned suspension support tower portion,
The bottom of the installation portion of above-mentioned driving engine department of assembly engages with above-mentioned front side member, and the overall width direction outside portion of the installation portion of this driving engine department of assembly engages with above-mentioned baffle portion,
The upward face of the installation portion of above-mentioned driving engine department of assembly is fixed in above-mentioned driving engine department of assembly.
5. vehicle body front structure according to claim 4 is characterized in that:
The installation portion of above-mentioned driving engine department of assembly is the case shape, and last face has opening,
Above-mentioned driving engine department of assembly embeds above-mentioned opening and is fixed.
6. vehicle body front structure according to claim 1 is characterized in that:
Above-mentioned the 1st transom, the upper bond of its rear portion and above-mentioned suspension support tower portion, the position that is positioned at the place ahead, above-mentioned driving engine department of assembly in the anterior and above-mentioned front side member engages, and constitutes from the bridge shape of the top process of above-mentioned driving engine department of assembly.
7. vehicle body front structure according to claim 6 is characterized in that:
Above-mentioned the 1st transom, have with above-mentioned front side member in be positioned at the 1st base portion that the position in the place ahead, above-mentioned driving engine department of assembly engages, and with above-mentioned front side member in be positioned at the 2nd base portion that the position at rear, above-mentioned driving engine department of assembly engages, the 2nd base portion is seen with above-mentioned driving engine department of assembly from positive apparent direction to coincide.
8. according to each described vehicle body front structure in the claim 1～6, it is characterized in that:
Rear view of vehicle one side of above-mentioned suspension support tower portion is formed with the car neck that extends along the overall width direction,
The top and the above-mentioned car neck of above-mentioned suspension support tower portion are provided with the 2nd transom that connects these two parts along fore-and-aft direction between the two.
9. according to each described vehicle body front structure in the claim 1～6, it is characterized in that:
Above-mentioned front side member, above-mentioned suspension support tower portion and above-mentioned the 1st transom are provided with in the left and right sides of overall width direction, and above-mentioned the 1st transom of pair of right and left is arranged to from overlooking narrower " Ha " shape of spacing that direction is seen vehicle the place ahead one side end,
Be provided with along the overall width direction between the top of the above-mentioned suspension support tower portion of pair of right and left and connect this suspension support tower connecting rod suspension support tower portion.
CN2007100886883A 2006-03-15 2007-03-15 Vehicle front body structure Expired - Fee Related CN101037118B (en)

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JP2006-070647 2006-03-15
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JP2006070647A JP2007245864A (en) 2006-03-15 2006-03-15 Front structure of vehicle body
JP2006070646A JP2007245863A (en) 2006-03-15 2006-03-15 Front structure of vehicle body
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