CN104417472B - The front structure of vehicle body of vehicle - Google Patents

Abstract

By being disposed in the guard block at the lower position of Vehicular body front, it is thus achieved that the effect of upspringing forwards of barrier energy absorption when the entrance of lower car body prevents, collides and barrier hereafter.Guard block (10) has: pair of right and left bracket (11), tilts with front downwards from the front portion of pair of right and left side frame (1) and extends；And reinforcement (12), extend along overall width direction in the lower section of pilot beam (3), and the front end installed to pair of right and left bracket (11).Collision load when the barrier in front is collided by guard block (10) by expression and the setting of the load envnlope of the relation of deflection; the effect entering suppression of the barrier lower section to Vehicular body front is carried out in the first stage from collision initial stage; second stage later carries out energy absorption to suppress the local deformation of barrier, the phase III thereafter is carried out upspring barrier to the effect in car body front.

Description

The front structure of vehicle body of vehicle

Technical field

The present invention relates to the front structure of vehicle body of vehicle.

Background technology

As in the automobile of vehicle, there is at Vehicular body front the pair of right and left side extended along the longitudinal direction Frame, is provided with the pilot beam extended along overall width direction in the front end of this pair of right and left side frame.Then, when When crashing into preceding object thing, when particularly crashing into the leg of pedestrian, in order to suppress barrier to enter Vehicular body front, the also lower section at pilot beam arrange guard block, and this guard block has along overall width direction The reinforcement (otherwise referred to as descending pilot beam) extended.In patent documentation 1, as above-mentioned protection portion Part, discloses the parts of energy when effectively absorbing collision with short stroke (impact).

Patent documentation 1: Japanese Unexamined Patent Publication 2009-179139 publication

, when imagining the situation that preceding object thing is pedestrian, guard block crashes into the lower limb of pedestrian Portion.In the case, it is possible to before preventing barrier from entering car body by the existence of guard block itself The lower section in portion.It addition, in order to suppress the local deformation (damage of such as leg) to barrier, permissible Expect that the deformation by guard block carries out energy absorption.Particularly, guard block crashes into pedestrian The relatively lower part (part below knee) of leg, and the hood fore-end of vehicle crashes into The part higher than knee of leg, it is possible to disperse up and down at leg and carry out energy absorption.

On the other hand, in vehicle, (or it is positioned at the car body on its front extended line at hood Exterior component) the extremely low vehicle of front position, such as sport car such in the case of, for as obstacle The leg of the such as pedestrian of thing, is difficult to absorb crash energy in the position higher than knee sometimes.It addition, Particularly in the case of barrier is pedestrian, pedestrian is preferably made forwards to upspring, i.e. after collision Fall on hood.

But, in the structure of patent documentation 1, only pass through guard block, it is difficult in order to suppress barrier While hindering the local deformation of thing to carry out sufficient energy absorption, barrier is made forwards to upspring.Especially It is, in the guard block of patent documentation 1, represents the relation of load when colliding and deflection Load envnlope is set to, along with load increase and deflection the most proportionally increases, because of And only pass through guard block, it is difficult to while the energy when fully absorbing collision, make barrier forward Upspring in side.

Summary of the invention

The present invention makes in view of as above situation, its object is to, it is provided that such a vehicle Front structure of vehicle body: by being disposed in the guard block at the lower position of Vehicular body front, prevent barrier Enter to lower car body, and sufficient energy absorption and make barrier the most forward when realizing colliding Upspring in side.

In order to realize described purpose, use following solution in the present invention.That is, such as technical scheme 1 As Suo Jizai, for a kind of front structure of vehicle body, it possesses: pair of right and left side frame, before car body Portion extends along the longitudinal direction；Pilot beam, extends along overall width direction, is installed on described pair of right and left side frame Front end；And guard block, possessing pair of right and left bracket and reinforcement, pair of right and left bracket is from institute Downwards and front extends obliquely to state the front portion of pair of right and left side frame, and reinforcement extends along overall width direction And it is disposed in the lower section of described pilot beam, is arranged on the front end of this pair of right and left bracket.Described protection Parts represent the load of the collision load during collision of the barrier to front and the relation of deflection by mark The setting of deformation characteristic, carried out suppressing barrier to car body in the first stage from collision initial stage The effect of the entrance of anterior lower section, carries out in the second stage after this first stage absorbing energy To suppress the effect of the local deformation of described barrier, the phase III after this second stage enters Be about to described barrier to car body front bullet role.

According to above-mentioned solution, by the setting of the load envnlope of guard block, it is thus achieved that obstacle Thing suppresses, suppresses effect and the barrier of the local deformation of barrier to entering of the lower section of Vehicular body front Hinder the thing effect of upspringing to car body front, it is thus achieved that for extremely advantageous on the Security Countermeasures of barrier Scheme.Especially, such as at the car without the part collided in the position higher than pedestrian knee In, it is also possible to be sufficiently carried out energy absorption, thus be preferred.

As the optimal way premised on above-mentioned solution is as described in technical scheme less than 2. That is:

The described load envnlope of described guard block is set to: in described second stage, with The described first stage was compared with the described phase III, and the deflection scaling up increased relative to load becomes Greatly.In the case, using the teaching of the invention it is possible to provide the concrete setting of load envnlope, it is right with technical scheme 1 to make The effect answered plays fully.

The effect of entrance suppression of described first stage, institute is carried out by described bracket and described reinforcement State the effect of the energy absorption of second stage and the bullet role of described phase III.In these feelings Under condition, effectively utilize reinforcement and bracket, reliably obtain the effect of described three phases, Thus be preferred.

Described reinforcement carries out the effect of entrance suppression of described first stage, the energy of described second stage The effect of amount absorption and the bullet role of described phase III.In the case, it is possible to the most logical Cross reinforcement and obtain the effect of described three phases.

The energy absorbing member extended along overall width direction, electromotor are installed before described pilot beam The front end of the front end of cover or the front body exterior component that is linked as the same face with hood front end is positioned at institute State the front of energy absorbing member.In the case, at the front end of hood or and hood The front end of the front body exterior component that front end is linked as the same face is positioned in the vehicle of extremely low position, it is possible to obtain Effect described in.During it addition, barrier is forwards upspring in the phase III, with hood Front end or the front end of front body exterior component as fulcrum, it is possible to make part the most forwards bullet below Rise as a result, make to throw away on hood on barrier, be sufficiently carried out the protection of barrier further, Thus be preferred.

The effect of invention

According to the present invention, by the setting of the load envnlope of guard block, it is thus achieved that barrier is to car The effect of the local deformation entering suppression, suppression barrier of the lower section that body is anterior and barrier to The effect of upspringing in car body front, it is thus achieved that for scheme extremely advantageous on the Security Countermeasures of barrier.

Accompanying drawing explanation

Fig. 1 is the axonometric chart of an example of the anterior construction representing the vehicle applying the present invention.

Fig. 2 is to represent that the front portion of the vehicle shown in Fig. 1 crashes into vertically extending barrier The side view of state.

Fig. 3 is the axonometric chart of the example representing bracket and the reinforcement used in the vehicle shown in Fig. 1.

Fig. 4 is the axonometric chart observing the bracket shown in Fig. 3 from rear with the bound fraction of reinforcement.

Fig. 5 is the side view of the bracket shown in Fig. 3.

Fig. 6 is the suitable sectional view of X6-X6 line of Fig. 3.

Fig. 7 is the suitable sectional view of X7-X7 line of Fig. 3.

Fig. 8 is the suitable sectional view of X8-X8 line of Fig. 3.

Fig. 9 is the performance plot of the load envnlope of the guard block representing the present invention.

Figure 10 is the major part axonometric chart representing second embodiment of the present invention.

Figure 11 is the suitable sectional view of X11-X11 line of Figure 10.

Figure 12 is the major part side view representing third embodiment of the present invention.

Figure 13 is the major part side view of the 4th embodiment representing the present invention.

Figure 14 is the major part side view of the 5th embodiment representing the present invention.

Figure 15 is the major part side view of the 6th embodiment representing the present invention.

Figure 16 is the major part side view of the 7th embodiment representing the present invention.

Symbol description:

1: side frame；3: pilot beam；4: energy absorbing member；6: installing plate；7: hood； 10: guard block；11: bracket；11E: bracket (Figure 14)；11F: bracket (Figure 15)；11G: Bracket (Figure 16)；12: reinforcement；12 B: reinforcement (Figure 10, Figure 11)；12 C: reinforcement (Figure 12)；12 D: reinforcement (Figure 13)；12 E: reinforcement (Figure 14～16)；100: flexible Impacter；101: the suitable portion of knee joint 1

Detailed description of the invention

In illustrating Fig. 1 of anterior construction of vehicle, 1 is that extend along the longitudinal direction, strong as car body The side frame (front side frame) of degree parts.Shock-absorbing box (crash can) 2 is installed in the front end of each side frame 1. Pair of right and left shock-absorbing box 2 is provided with pilot beam 3 that extend along overall width direction, as strength member. And, before pilot beam 3, the energy absorbing member 4 extended along overall width direction is installed.Energy Absorption piece 4 such as can be formed by synthetic resin.Additionally, in FIG, 5 is to hang crossbeam (to hang Frame).

In the leading section of side frame 1, via the installing plate 6 as strength member, guard block 10 is installed, This guard block 10 has bracket 11 and reinforcement (lower pilot beam) 12.Bracket 11 and reinforcement 12 Such as formed by processing ferrous metal plate.

It addition, in the present embodiment, although before bracket 11 is arranged on side frame 1 via installing plate 6 End, but the invention is not restricted to this.Such as, bracket 11 can also be directly installed on side frame 1.

In fig. 2,7 is the hood as car body exterior component, and its front end is positioned at energy absorbing member The dead ahead of 4.I.e., in embodiments, become the vehicle setting hood 7, specifically extremely lowly For, the energy absorbing member 4 height and position from road surface is about 40 to 50cm, is relatively low position Put.Additionally, following vehicle: additionally there is the front end with hood 7 and be linked to be the same face Front body exterior component, this front body exterior component is positioned at the dead ahead of energy absorbing member 4.Certainly, Vehicle as the application of the present invention, it is also possible to be following vehicle: the front end of hood 7 or The front end of above-mentioned front body exterior component is positioned at the higher position of specific energy absorption parts 4.

Then, with reference to Fig. 2 to Fig. 5, the bracket 11 as guard block 10 and reinforcement 12 are described. First, particularly as it is shown in figure 5, bracket 11 has: body 11a, be formed as along with towards rear Side and width becomes larger；Lip portions 11b is installed, is formed at the rearward end and vertically of body 11a Direction extends；And installation portion 11c, 11d before a pair, it is formed at the leading section of body 11a.? Under the state that above-mentioned lip portions 11b is positioned over installing plate 6, will be prominent by the setting tools such as bolt 13 Edge 11b is fixed to installing plate 6 (with reference to Fig. 1, Fig. 2).Under this stationary state, bracket 11 is i.e. Body 11a becomes the posture state (with reference to Fig. 2, Fig. 5) tilted downwards and extend with front.

It addition, in the present embodiment, bracket 11 is made up of 1 parts, but the invention is not restricted to This.Such as, bracket 11 can also be constituted with upper-part by 2.

Reinforcement 12 extends along overall width direction in the position lower than pilot beam 3, is fixed on pair of right and left The front end of bracket 11.As shown in Figure 3, Figure 4, the front installation portion 11c of bracket 11 is fixed to reinforcement The upper surface (such as by fixing that welding or holding appliance are carried out) of 12, this fixed position is with symbol 14 represent.It addition, the back side that the front installation portion 11d of bracket 11 is fixed to reinforcement 12 is (the most logical Cross welding or that holding appliance is carried out be fixing), this fixed position represents with symbol 15.

The cross-sectional configuration of reinforcement 12 is shown in Fig. 6 to Fig. 8.Fig. 6 illustrates the car of reinforcement 12 Cross section near cross direction central authorities, Fig. 8 illustrates that reinforcement 12 is near the fixed position of bracket 11 Cross section, Fig. 7 illustrates the cross section of the position along overall width direction between Fig. 6 and Fig. 8.Such as Fig. 6, figure Shown in 7, reinforcement 12 is by first component 21 and second component 22, and its leading section is formed as open Cross section, end is configured to closed section thereafter.Width before and after the closed section of overall width direction central part Maximum, along with from overall width direction central part towards outside overall width direction, before and after closed section width by Gradual change is little.And, as shown in Figure 8, near the fixed position of bracket 11, there is not second component 22, Open cross-sections structure (sheet material structure) is become throughout fore-and-aft direction total length.So, the closer to overall width Outside direction, i.e. closer to bracket 11, closed section structure is the least, and near bracket 12 not There is closed section, thus, for reinforcement 12, will not due to the impact of bracket 11 overall width Direction Outboard Sections becomes too high with middle body phase specific rigidity.

Particularly as in figure 2 it is shown, reinforcement 12 becomes its front end of open cross-sections in Fig. 6, Fig. 7 Part, by along with towards front downward in the way of forward downward tilt.And, such as Fig. 6 extremely Shown in Fig. 8, the front end of reinforcement 12 becomes shorter in the way of below substantially 90 degree and bends State, the kink of this bending represents with symbol 12a.

Here, constituted guard block 10 by bracket 11 and reinforcement 12, it is contemplated that as preceding object thing Such as pedestrian and this guard block 10 situation about colliding.In the case, reinforcement 12 and pedestrian Leg collide, in fig. 2, it is contemplated that the flexible collision parts symbol 100 for pedestrian lower leg represents, The part symbol 101 suitable with its knee joint represents.As can be seen from Figure 2, energy absorbing member 4 Crashing near knee joint considerable part 101, reinforcement 12 crashes into than knee joint considerable part 101 Much lower position (near ankle).

Then, illustrate in the case of crashing into the pedestrian as preceding object thing, bracket 11 and reinforcement The part 12 defencive function to pedestrian.First, setting load envnlope as shown in Figure 9, this load becomes Shape personality presentation as the bracket 11 of guard block 10 and reinforcement 12, collide load and deflection Relation.That is, in the first stage from collision initial stage, as shown in characteristic line α 1, owing to adding Strong part 12 supports, and compared to the increase of load, the scaling up of deflection is relatively small (high rigidity). By the load envnlope in this first stage, it is therefore prevented that barrier (the particularly leg of pedestrian) Enter the state of affairs of the lower section of Vehicular body front.

Second stage after the above-mentioned first stage, as shown in characteristic line α 2, with first stage phase Ratio is relatively big (low rigidity) relative to the increase of load, deflection scaling up.That is, by making The leading section of reinforcement 12 tilts with front downwards, by collision load with inclined downward backward Mode deforms (that is, to become collinear side upwardly-deformed with bracket 11).Thereby, it is possible to obtain Effect below: carry out energy absorption, suppresses the local deformation of the pedestrian lower leg as barrier.

Phase III after above-mentioned second stage, as shown in characteristic line α 3, with second stage phase Ratio, less relative to the increase of load, deflection scaling up (high rigidity).I.e., although add Strong part 12 in described second stage with becoming on collinear direction downwards with bracket 11 and The mode of back sweep deforms, but quickly becomes the most same straight line, thus, bracket 11 with bracket 11 Deformation is played bigger resistance, and relative to the increase of load, the scaling up of deflection diminishes.This Outward, in embodiments, it is set as the 3rd relative to increase, the deflection scaling up of load Stage is minimum.By the load envnlope in this phase III, as the pedestrian of barrier towards car Upspring in body front.Now, pedestrian is neighbouring as fulcrum, specific energy absorption portion using energy absorbing member 4 Part 4 part on the lower is upspring, and pedestrian is raised on hood 7 such effect, The Security Countermeasures of pedestrian are highly preferred.

Figure 10, Figure 11 are the figures representing second embodiment of the present invention.In the present embodiment, only Load envnlope as Fig. 9 is obtained by reinforcement 12 B (corresponding to 12).That is, strengthening In part 12 B, before and after removing front and rear, direction pars intermedia becomes undulatory low rigid portion 31, Part before and after it is respectively high rigidity.Additionally, in this second embodiment, real with described first Executing mode same, the front portion of reinforcement 12 B is open cross-sections structure, and rear portion is closed section structure. In this second embodiment, also with described execute mode as, it is possible to obtain the first stage entrance press down The effect of upspringing of effect, the energy absorption of second stage and the phase III of system.Especially, In this second embodiment, it is possible to only set by the load envnlope of reinforcement 12 B and obtain the The effect of one stage, second stage and phase III.

Figure 12 is the figure representing third embodiment of the present invention.In the present embodiment, real with second Execute mode same, only obtain deformation under load as Fig. 9 by reinforcement 12 C (corresponding to 12) special Property.That is, reinforcement 12 C is the structure of before and after 2 segmentation, and spiral shell is passed through in the leading section of back component 42 The holding appliances such as bolt 43 and nut 44 are fixed on the rear portion of front component 41.And, in front component Between rear portion and the protuberance 42a being formed at second component 42 of 41, the spring of intervening acts elastomeric element 45.If subjected to specify the collision load of above size, then bolt 43 and the fixation of nut 44 Being released from, front component 41 is rearward slided relative to back component 42, with this front component 41 Rearward slip, spring 45 is compressed.

In the above-described 3rd embodiment, first is carried out before the compression at spring 45 starts The effect (high rigidity) in stage, has carried out the effect of second stage (low just by making spring 45 compress Property), the effect (high rigidity) carrying out the phase III afterwards it is fully compressed at spring 45.

Figure 13 is the figure of the 4th embodiment representing the present invention.In the present embodiment, only by adding Strong part 12 D (corresponding to 12) obtains load envnlope as Fig. 9.That is, reinforcement 12 D Process for upper side member 51 with after being positioned at upper side member 51 by one block of sheet material is curved The dual structure up and down of the lower side member 52 below end.On upper side member 51, in its front and back It is formed with the first protruding downwards protuberance 51a to substantially pars intermedia.In lower side member 52, The rear of one protuberance 51a is formed with the second protuberance 52a protruding to upside.

In the above-described 4th embodiment, in collision initial stage, upper side member 51 support and carry out first The effect (high rigidity) in stage.After stage, the first protuberance 51a is towards rear along front and back To collapse-deformation, and carry out the effect (low rigidity) of second stage.After second stage, first is convex Portion 51a is connected to the second protuberance 52a, thus carries out the effect (high rigidity) of phase III.

Figure 14 is the figure of the 5th embodiment representing the present invention.In the present embodiment, by bracket 11E (being equivalent to 11) and reinforcement 12E (being equivalent to 12) jointly act on and obtain load as Fig. 9 and become Shape characteristic.In the present embodiment, the top in the rearward end of bracket 11E is formed with notch 11f. It addition, on installing plate 61 (being equivalent to the installing plate 6 in the first embodiment), in the face of bracket 11E Rearward end and form retainer 61a.Additionally, reinforcement 12E itself is different from the first embodiment, Its load envnlope is set to the increase according to load and deflection is gradually increased, or and load The scaling up increasing corresponding deflection become necessarily (this another reality shown in Figure 15, Figure 16 Execute mode the most identical).

In the present embodiment, in collision initial stage, bracket 11E and reinforcement 12E support and carry out The effect (high rigidity) of first stage.After stage, during bracket 11E with notch 11f is The heart shakes with rear downwards, thus carries out the effect (low rigidity) of second stage.Hereafter, downwards It is connected to retainer 61a with the bracket 11E of rear shake, thus carries out the effect (Gao Gang of phase III Property).

Figure 15 is the figure of the 6th embodiment representing the present invention.In the present embodiment, by bracket 11F (being equivalent to 11) and reinforcement 12E jointly act on and obtain load envnlope as Fig. 9.At this In embodiment, the rearward end of bracket 11F becomes the state of vertically extending wider width, It is set as that rigidity is higher.And, in bracket 11F, by the high rigid portion of rearward end and reinforcement 12E Bond sites between mid portion be formed as narrower width and the kink 71 with stepped bending.

In the present embodiment, in collision initial stage, bracket 11F and reinforcement 12E support and carry out The effect (high rigidity) of first stage.After stage, the kink 71 such as figure of bracket 11F Shown in the dotted line of 15, deformation, carries out the effect (low rigidity) of second stage.Hereafter, if kink The step that deforms into of 71 is carried out, and is born collision load by the high rigid portion of bracket 11F the most in the near future, enters The effect (high rigidity) of row phase III.In addition it is also possible to make the lower end of the high rigid portion of bracket 11F Portion extends to downwards the height and position of such as reinforcement 12E than the situation of diagram, makes this downwards The rear of the part extended kink 71 before deformation.

Figure 16 is the figure of the 7th embodiment representing the present invention.In the present embodiment, by bracket 11G Jointly act on reinforcement 12E and obtain load envnlope as Fig. 9.In the present embodiment, The installing component 72 of high rigidity is fixed on installing plate 6.And, relative to installing component 72 times The rotation section 73 that end is constituted, the rearward end of bracket 11G can joltily be concatenated.This rotation section 73 Center of rotation (the shake center of bracket 11G) is set to: due to the fastening under prescribed torque, Can not rotate under the turning moment less than setting, when by the turning moment of setting above size, Bracket 11G shakes with rear downwards centered by rotating fulcrum 73a.And, at installing component 72 On, below the rearward end of bracket 11G, form retainer 72a.

In the present embodiment, bracket 11G and reinforcement 12E support and carry out the work of first stage With (the not shake centered by rotating fulcrum 73a, high rigidity).Hereafter, bracket 11G is to rotate Produce the rotational resistance of regulation centered by fulcrum 73a and shake, having carried out the effect of second stage (low just Property).If the shake of bracket 11G is carried out further, bracket 11G is connected to retainer 72a the most in the near future, Carry out the effect (high rigidity) of phase III.

It is explained above various embodiment, but the present invention is not limited to embodiment, in claim Suitable change can be carried out in scope described in book.The first embodiment party shown in Fig. 6 to Fig. 8 In formula, reinforcement 11 is not limited to use the situation of the two boards parts 21,22 of composition separated from one another, One block of sheet material can also be curved processing and obtain and construct as Fig. 6 to Fig. 8.Certainly, originally The purpose of invention is not limited to the purpose being expressly recited, and also implys offer substantially preferably either as excellent The scheme of some performance.

Industrial applicibility

The present invention carries out the protection to barrier, is preferred colliding on Security Countermeasures.

Claims (4)

1. the front structure of vehicle body of a vehicle, it is characterised in that possess:

Pair of right and left side frame, extends along the longitudinal direction at Vehicular body front；

Pilot beam, extends along overall width direction, is installed on the front end of described pair of right and left side frame；And

Guard block, possesses: pair of right and left bracket, from the front portion of described pair of right and left side frame downwards And front extends obliquely；And reinforcement, extend along overall width direction and be disposed in described pilot beam Lower section, be arranged on the front end of this pair of right and left bracket,

The setting by load envnlope of the described guard block, on the first rank from collision initial stage Carry out suppressing the effect of the entrance of the barrier lower section to Vehicular body front in Duan, after this first stage Second stage in carry out the effect of local deformation that absorbs energy to suppress described barrier, this Phase III after two-stage is carried out by described barrier to car body front bullet role, described Load envnlope represents the pass of collision load when the described barrier to front collides and deflection System,

In described guard block, described load envnlope is set to: in described second stage, Compared with described first stage and described phase III, the deflection scaling up increased relative to load Become big.

The front structure of vehicle body of vehicle the most according to claim 1, it is characterised in that

The effect of entrance suppression of described first stage, institute is carried out by described bracket and described reinforcement State the effect of the energy absorption of second stage and the bullet role of described phase III.

The front structure of vehicle body of vehicle the most according to claim 1, it is characterised in that

Described reinforcement carries out the effect of entrance suppression of described first stage, the energy of described second stage The effect of amount absorption and the bullet role of described phase III.

4. according to the front structure of vehicle body of the vehicle according to any one of claims 1 to 3, its feature It is:

The energy absorbing member extended along overall width direction is installed before described pilot beam,

The front end of hood or be linked as the front body exterior component of the same face with hood front end Front end is positioned at the front of described energy absorbing member.