CN206394586U - A kind of automobile rear-end pre-crash system - Google Patents

Abstract

The utility model discloses a kind of automobile rear-end pre-crash system, including car body, it is arranged at the longeron of car body both sides, back buffer beam, the rear energy-absorption box that one end is connected with back buffer beam, the truss frame being connected with the rear energy-absorption box other end, it is arranged at truss inframe and the first buffer spring that one end is connected with truss frame and the buffer shaft that is arranged at the first buffer spring other end, two buffer shafts are arranged with the truss frame triangularity shape, and two buffer shaft be connected respectively with two longerons, occupant's framework is provided with above car body, connected between occupant's framework and back buffer beam by pilot beam, two pilot beams are symmetricly set on back buffer beam, and the Buffer Unit for buffering is additionally provided between back buffer beam and truss frame；Using the structure of the passive anticollision in rear end as the basis of Path of Force Transfer, by multiple Buffer Units and corresponding structure annexation, make rear vehicle end that there is good structural strength and the effect for hitting buffering is preferably reached when being knocked.

Description

A kind of automobile rear-end pre-crash system

Technical field

The utility model is related to automotive field, more specifically, it relates to a kind of automobile rear-end pre-crash system.

Background technology

Automobile chassis is made up of power train, running gear, steering system and the part of braking system four, and chassis effect is supporting, installation Automobile engine and its each part, assembly, shape the moulded of automobile and receive again and hit what is played support and buffer Effect, and receive the power of engine, automobile is produced motion, it is ensured that normally travel；Either orthodox car or new energy Automobile, body lightening turns into study hotspot, and especially to electric automobile, light-weighted meaning is bigger, requires light-weighted It is higher, in order to reach significant light weight effect, it is necessary to find new solution from material, structure and manufacturing process.

Traditional automobile chassis is generally middle column type or rectangular frame type, and Publication No. CN104494702A Chinese patent is public A kind of pure electric automobile chassis system of use lightweight passenger-carrying chassis structure, including two longitudinal girders and some horizontal strokes are opened Beam, some crossbeams are distributed in the different height aspect and different longitudinal position of two longitudinal girders, and some crossbeam joggles are in two Longitudinal girder forms double longeron multilayer soles of overall stress；The front portion of double longeron multilayer soles is connected with front axle bracket, preceding Crane span structure is fixed by two longitudinal girders；The rear portion of double longeron multilayer soles is connected with rear axle stand；Rear axle stand passes through two Bar longitudinal girder is fixed；Front axle bracket is connected with front axle assy, and rear axle stand is connected with rear axle assy, double longeron multilayer soles It is provided with drive assembly and energy assembly.

Double longeron multilayer soles are formed by longitudinal girder and crossbeam joggle, make forward and backward crane span structure vertical by two respectively It is fixed to crossbeam, battery and motor is positioned over chassis both sides；Although combining overall stress type body structure and double vertical The advantage of beam body structure, when automobile receives shock, reaches the anticollision of rear vehicle end by longeron and rear axle stand in the program Effect, due to centre-pillar structure and the anticollision performance and limited strength of body rearward structure, chassis rear end is impacted Performance substantially reduce, while the distribution inequality of rear end causes that the center of gravity of vehicle is higher, vehicle is unstable, when clashing, right The protection of occupant is inadequate, so as to influence the security performance of burst accident in driving procedure.

Utility model content

In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of vehicle anti-collision performance more Good electric automobile rear-end pre-crash system.

To achieve the above object, the utility model provides following technical scheme：

A kind of automobile rear-end pre-crash system, including car body, be arranged at the longeron of car body both sides, back buffer beam, one end with after Collision prevention girders connection rear energy-absorption box, be connected with the rear energy-absorption box other end truss frame, be arranged at truss inframe and one end and truss First buffer spring of frame connection and the buffer shaft for being arranged at the first buffer spring other end, buffer shaft described in two and the purlin Frame frame triangularity shape is arranged, and buffer shaft described in two is connected with two longerons respectively, and occupant is provided with above the car body Framework, is connected, pilot beam is symmetricly set in back buffer beam described in two between occupant's framework and back buffer beam by pilot beam On, and the Buffer Unit for buffering is additionally provided between collision prevention girders and truss frame in the rear.

It is arranged such, the truss frame built by the steel of high intensity and rigidity is hung thereon with facility, supports various set It is standby, such as trailing wheel；When automobile is by the fierce collision come from rear portion, back buffer beam absorbs shock kinetic energy and is resent to rear energy-absorbing Box, simultaneous buffering component plays good cushioning effect using the shock-absorbing capacity of itself, absorbs the energy that part is hit, delays simultaneously Deposit most of energy；When truss frame is being collapsed, the energy of part shock is dispersed to occupant's frame by pilot beam by multiple directions The all angles of frame, reach the effect of buffering, and after truss frame is collapsed to a certain extent, it is enterprising that back buffer beam is depressed into buffer spring The effect of row buffering decompression；The buffer spring other end is connected by the buffer shaft with truss frame formation triangle, utilizes triangle The stability of shape, stability when on the one hand can improve shock between buffer spring and truss improves truss frame with delaying The bonding strength rushed between spring, reaches preferably protection middle-end chassis subsystem and occupant thereon and the power in it Battery pack, on the other hand and is dispersed to multiple directions by the impact being subject to, reaches the effect of alleviation；Pass through in design simultaneously Avoid may occurring the dangerous deformations unfavorable to occupant, reduce the caused intrusion and holding to driving cabin of rearward collision relatively Low collision deceleration, ensures the safety of occupant with this；Based on the buffer structure Path of Force Transfer passively collided by rear vehicle end, Set the purpose of rear end collision multilayer buffering Path of Force Transfer to embody crashworthiness, energy is rationally and effectively absorbed and is passed Pass；Rear end chassis subsystem collapses, reaches the effect for absorbing impact energy in corresponding Buffer Unit and attachment structure during shock, So that the occupant on body middle-end is preferably protected.

Further set：Projection is provided with the truss frame, the raised end face is by rear energy-absorption box with after Collision prevention girders are connected, and an end of first buffer spring is arranged in the depression that raised other end is formed and consolidated with truss frame Fixed connection, the other end of the first buffer spring is fixedly connected with two interconnected buffer shaft, and the Buffer Unit is symmetrical arranged In raised both sides.

It is arranged such, when back buffer beam receives shock, back buffer beam is pressurized, while acting on rear energy-absorption box and both sides Buffer Unit on, absorbed using rear energy-absorption box and Buffer Unit and part impact during buffering collision of closed, while raised Setting, one end of its sunken inside can be easy to buffer spring clamping, fixed buffering elastic is played when playing buffer spring stress The effect of spring, raised one end is used for energy-absorption box after supporting, and the impact that rear energy-absorption box is passed over is dispersed to truss frame Both sides, reduce the problem of concentrating stress when vehicle rear-side is hit.

Further set：Lead is provided with the end face of depression, an end of first buffer spring is socketed on It is fixedly connected on lead and with truss frame.

It is arranged such, an end of the first buffer spring is socketed on lead, and be fixedly connected with truss frame, One buffer spring compress when, lead can play a part of the first buffer spring compression guiding, make the first buffer spring by When being hit to afterbody direction, the compression buffering direction of the first buffer spring and impact force direction are perpendicular, improve first and delay Rush the performance of spring-compressed buffering.

Further set：The first energy-absorption box is provided between the buffer shaft and longeron, buffer shaft is set respectively with longeron It is placed in the first energy-absorption box both ends of the surface, and buffer shaft is arranged at the inner side of longeron.

It is arranged such, after buffer spring, which hits, to be damaged, buffer shaft with the first energy-absorption box by reaching part impact The effect on longeron is dispersed to, when the first energy-absorption box stress is excessive and impaired, because buffer shaft is arranged at the inner side of longeron, is made The power that buffer shaft is expanded outwardly to longeron formation, and longeron is connected with vehicle body and three-dimensional casing in itself, with preferable stable Performance, can improve collision prevention girders and continue to play the effect of anticollision buffering, improve the Stability Analysis of Structures between buffer shaft and longeron when hitting Property.

Further set：At least provided with two energy-absorbing muscle, the energy-absorbing in first energy-absorption box, rear energy-absorption box The axis of muscle is vertically arranged with Impact direction.

It is arranged such, energy-absorbing muscle is arranged in the first energy-absorption box, rear energy-absorption box, when main purpose is easy for low speed collision Absorb enough energy, it is ensured that body shell is not destroyed, reduce the damaged condition after Vehicular impact；Simultaneously by the axle of reinforcement Line must be perpendicular to Impact direction setting, it is to avoid cause torsion during vibration, improve the structural strength of energy-absorption box.

Further set：The Buffer Unit includes support shaft and is vertically arranged energy-absorbing spring, two institutes with Impact direction State between support shaft and back buffer beam triangularity shape to arrange, and the connection end of two support shafts is connected with truss frame, the other end and Back buffer beam is fixedly connected, and the energy-absorbing spring is arranged on the center line of triangle, and the connection of two ends respectively with support shaft End is fixedly connected with back buffer beam.

It is arranged such, when back buffer beam is hit, impact suffered by back buffer beam is positive in Buffer Unit, this When support shaft and back buffer beam arranged into triangular shape shape, the supporting ＆ stablizing performance of Buffer Unit can be improved using Triangle Principle, Simultaneously when energy-absorbing spring is pressurized, supporting role when helping to aid in energy-absorbing spring-compressed；While the wherein side of support shaft Side is connected with rear energy-absorption box, can increase lifting surface area, improves crashworthiness.

Further set：Collision prevention girders are towards being provided with fixed column on the end face of truss frame in the rear, the energy-absorbing spring One end is socketed in fixed column and is fixedly connected with back buffer beam.

It is arranged such, an end of energy-absorbing spring is socketed in fixed column, and be fixedly connected with back buffer beam, in energy-absorbing During spring-compressed, fixed column can play a part of compression of the energy-absorbing spring in compression and be oriented to, and make energy-absorbing spring by tail When portion's direction is hit, when the impulsive force of back buffer beam is sent to energy-absorbing spring, compression buffering direction and the punching of energy-absorbing spring Hit that force direction is perpendicular, improve the performance of energy-absorbing spring-compressed buffering.

Further set：Be provided with connecting rod between the truss frame and pilot beam, some connecting rods in W shapes according to Secondary connection, and be arranged between truss frame and pilot beam.

Be arranged such, connected between truss frame and pilot beam by connecting rod, and connecting rod truss frame and pilot beam it Between into W shapes arrangement, and make truss frame and pilot beam form multiple triangular structures to arrange, i.e. the form of similar truss, utilize three Angular principle, can improve the structural strength between truss frame and pilot beam；On the one hand collapsed using truss when hitting, absorption is hit Hit kinetic energy, on the other hand using the stress in structure be carried out continuously multiple directions shunting and by energy longeron backward transmit with And member's framework, reach the effect for improving anticollision performance.

Further set：The second buffering elastic is provided with the center line of the buffer shaft and the triangle of truss frame formation Spring, the second buffer spring two ends are fixedly connected with the junction of buffer shaft and truss frame respectively.

It is arranged such, by being provided with the second buffering elastic on the center line of buffer shaft and the triangle of truss frame formation Spring, makes rear end when being hit, and first plays a part of buffering by the compression of the first buffer spring, when the first buffer spring is compressed to During the limit, reaching the effect of buffering again by the second buffer spring, truss inframe is reached the effect repeatedly buffered, simultaneously Also injury during secondary impact is reduced to a certain extent.

Further set：It is connected with occupant's framework in luggage cover plate, the luggage cover plate and is provided with inner support plate, Some inner support plates are sequentially connected in M shapes.

It is arranged such, the luggage cover plate of rear vehicle end occurs corresponding deformation and may also function as when rear vehicle end is knocked The effect of certain anticollision buffering, sets corresponding inner support plate, it is sequentially connected into M shapes, makes interior branch in luggage cover plate The support frame of multiple triangles is formed between fagging and luggage cover plate, rear vehicle end is improved when being hit, luggage cover plate Corresponding structural strength is played, crashworthiness when rear vehicle end is knocked is improved.

By using above-mentioned technical proposal, the utility model is compared compared with the prior art：Pass through the knot of the passive anticollision in rear end Structure, by Buffer Unit and corresponding structure annexation, passes through the energy that part is hit as the basis of Path of Force Transfer Multiple directions are dispersed to all angles of occupant's framework, reach the effect of buffering, rear vehicle end is had good structural strength And the effect for hitting buffering is preferably reached when being knocked, battery of the occupant on middle-end body with is obtained To more preferable protection, travel safer.

Brief description of the drawings

Fig. 1 is the structural representation of automobile rear-end pre-crash system；

Fig. 2 is the top view of automobile rear-end pre-crash system；

Fig. 3 is the enlarged drawing at A in Fig. 2；

Fig. 4 is the partial sectional view in automobile rear-end pre-crash system at rear energy-absorption box on axis.

In figure：1st, car body；2nd, back buffer beam；3rd, longeron；4th, rear energy-absorption box；5th, truss frame；51st, it is raised；52nd, lead； 6th, the first buffer spring；7th, buffer shaft；8th, occupant's framework；9th, Buffer Unit；91st, support shaft；92nd, energy-absorbing spring；93rd, it is fixed Post；10th, pilot beam；11st, the first energy-absorption box；111st, energy-absorbing muscle；12nd, connecting rod；13rd, the second buffer spring；14th, luggage cover plate； 15th, inner support plate.

Embodiment

Automobile rear-end pre-crash system is described further referring to figs. 1 to Fig. 4.

As shown in figure 1, a kind of automobile rear-end pre-crash system, including car body 1, back buffer beam 2, it is arranged at the both sides of car body 1 Longeron 3, one end and the connection of back buffer beam 2 energy-absorbing material are absorbed because hitting the huge energy produced by deforming as much as possible Afterwards energy-absorption box 4, be connected with the rear other end of energy-absorption box 4 truss frame 5, be arranged in truss frame 5 and one end is connected with truss frame 5 First buffer spring 6 and the buffer shaft 7 for being arranged at the other end of the first buffer spring 6；The top of car body 1 is provided with occupant's frame Frame 8, is connected between occupant's framework 8 and back buffer beam 2 by pilot beam 10, and two pilot beams 10 are symmetricly set on back buffer beam 2.

As shown in Fig. 2 being provided with projection 51, one end of projection 51 towards the interlude of the connection end of back buffer beam 2 in truss frame 5 Face is connected by rear energy-absorption box 4 with back buffer beam 2, and other end is set in depression；Lead is provided with the end face of depression 52, an end of buffer spring is socketed on lead 52 and is fixedly connected with truss frame 5, and the other end delays with two interconnected Axle 7 is rushed to be fixedly connected；The junction of two buffer shafts 7 is equally provided with corresponding lead 52, is socketed on buffer spring and leads It is fixedly connected on to post 52 with buffer shaft 7.

As shown in figure 3, the end face triangularity shape of two buffer shafts 7 and truss frame 5 towards longeron 3 is arranged；In buffer shaft 7 The first energy-absorption box 11 is provided between longeron 3, buffer shaft 7 is respectively arranged in the both ends of the surface of the first energy-absorption box 11 with longeron 3, and Buffer shaft 7 is arranged at the inner side of longeron 3；Second is provided with the center line of buffer shaft 7 and the triangle of the formation of truss frame 5 to delay Spring 13 is rushed, the two ends of the second buffer spring 13 are fixedly connected with the junction of buffer shaft 7 and truss frame 5 respectively；In the second buffering Spring 13 can equally set corresponding lead 52 with the junction of truss frame 5, and an end of the second buffer spring 13 is socketed on It is fixedly connected on lead 52 and with truss frame 5, the other end is fixedly connected with two interconnected buffer shaft 7；For second During the compression buffering of buffer spring 13, lead 52 is played stable and is oriented to during for compress to the second buffer spring 13 and surely Fixed effect.

As shown in figure 4, at least provided with two energy-absorbing muscle 111, energy-absorbing muscle in the first energy-absorption box 11, rear energy-absorption box 4 111 axis is vertically arranged with Impact direction.

As shown in figure 3, the Buffer Unit 9 for buffering is additionally provided between back buffer beam 2 and truss frame 5, and buffering Component 9 is symmetricly set in the both sides of projection 51；Buffer Unit 9 includes support shaft 91 and is vertically arranged energy-absorbing bullet with Impact direction Spring 92；In back buffer beam 2 towards fixed column 93 is provided with the end face of truss frame 5, an end of energy-absorbing spring 92 is socketed on fixation Be fixedly connected on post 93 and with back buffer beam 2, another end by the fixed column 93 that is arranged on the junction of two support shaft 91 with Support shaft 91 is connected.

As shown in figure 1, triangularity shape is arranged between two support shafts 91 and back buffer beam 2, two composition triangle arrangements The formation tetrapyamid shape of support shaft 91, and the connection end of support shaft 91 is connected with truss frame 5, and the other end is fixed with back buffer beam 2 Connection；Energy-absorbing spring 92 is arranged on the center line of rectangular pyramid, and the two ends connection end respectively with support shaft 91 of energy-absorbing spring 92 It is fixedly connected with back buffer beam 2.

As shown in figure 1, be provided with connecting rod 12 between truss frame 5 and pilot beam 10, some connecting rods 12 in W shapes successively Connect and be arranged between truss frame 5 and pilot beam 10, the pilot beam that the impact being subject on truss frame 5 is set by arcuation 10 reach the scattered effect of all directions；It is connected with occupant's framework 8 in luggage cover plate 14, luggage cover plate 14 and is provided with inner support Plate 15, some inner support plates 15 are sequentially connected in M shapes.

Using the structure of the passive anticollision in rear end as the basis of Path of Force Transfer, pass through multiple Buffer Units 9 and corresponding knot Structure annexation, the energy for hitting part is dispersed to all angles of occupant's framework 8 by multiple directions, reaches the work of buffering With making rear vehicle end that there is good structural strength and the effect for hitting buffering preferably reached when being knocked, will be located at Battery of the occupant with middle-end body is preferably protected, the security performance during being knocked and travelling Improve.

Described above is only preferred embodiment of the present utility model, and protection domain of the present utility model is not limited merely to Above-described embodiment, all technical schemes belonged under the utility model thinking belong to protection domain of the present utility model.It should refer to Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.

Claims (10)

1. a kind of automobile rear-end pre-crash system, including car body（1）And it is arranged at car body（1）The longeron of both sides（3）, its feature exists In：Also include back buffer beam（2）, one end and back buffer beam（2）The rear energy-absorption box of connection（4）And rear energy-absorption box（4）The other end connects The truss frame connect（5）, be arranged at truss frame（5）Interior and one end and truss frame（5）First buffer spring of connection（6）And set In the first buffer spring（6）The buffer shaft of the other end（7）, buffer shaft described in two（7）With the truss frame（5）Triangularity shape cloth Put, and buffer shaft described in two（7）Respectively with two longerons（3）Connection, in the car body（1）Top be provided with occupant's framework（8）, Occupant's framework（8）With back buffer beam（2）Between pass through pilot beam（10）Connection, pilot beam described in two（10）It is symmetricly set in Back buffer beam（2）On, and collision prevention girders in the rear（2）With truss frame（5）Between be additionally provided with Buffer Unit for buffering （9）.

2. automobile rear-end pre-crash system according to claim 1, it is characterised in that：In the truss frame（5）On be provided with It is raised（51）, the projection（51）End face pass through rear energy-absorption box（4）With back buffer beam（2）Connection, first buffering elastic Spring（6）An end be arranged at projection（51）Other end formed depression in and with truss frame（5）It is fixedly connected, the first buffering Spring（6）The other end and two interconnected buffer shaft（7）It is fixedly connected, the Buffer Unit（9）It is symmetricly set in projection （51）Both sides.

3. automobile rear-end pre-crash system according to claim 2, it is characterised in that：Guiding is provided with the end face of depression Post（52）, first buffer spring（6）An end be socketed on lead（52）It is upper and with truss frame（5）It is fixedly connected.

4. automobile rear-end pre-crash system according to claim 1, it is characterised in that：In the buffer shaft（7）With longeron（3） Between be provided with the first energy-absorption box（11）, buffer shaft（7）With longeron（3）It is respectively arranged at the first energy-absorption box（11）In both ends of the surface, And buffer shaft（7）It is arranged at longeron（3）Inner side.

5. automobile rear-end pre-crash system according to claim 4, it is characterised in that：In first energy-absorption box（11）, after Energy-absorption box（4）It is interior at least provided with two energy-absorbing muscle（111）, the energy-absorbing muscle（111）Axis vertical with Impact direction set Put.

6. automobile rear-end pre-crash system according to claim 1, it is characterised in that：The Buffer Unit（9）Including support Axle（91）And it is vertically arranged energy-absorbing spring with Impact direction（92）, support shaft described in two（91）With back buffer beam（2）Between into Triangle is arranged, and two support shafts（91）Connection end and truss frame（5）Connection, the other end and back buffer beam（2）It is fixed to connect Connect, the energy-absorbing spring（92）Be arranged on the center line of triangle, and two ends respectively with support shaft（91）Connection end and after Collision prevention girders（2）It is fixedly connected.

7. automobile rear-end pre-crash system according to claim 6, it is characterised in that：Collision prevention girders in the rear（2）Towards truss Frame（5）End face on be provided with fixed column（93）, the energy-absorbing spring（92）An end be socketed on fixed column（93）It is upper and with Back buffer beam（2）It is fixedly connected.

8. automobile rear-end pre-crash system according to claim 1, it is characterised in that：In the truss frame（5）With pilot beam （10）Between be provided with connecting rod（12）, some connecting rods（12）It is sequentially connected in W shapes, and is arranged at truss frame（5）With Pilot beam（10）Between.

9. automobile rear-end pre-crash system according to claim 1, it is characterised in that：In the buffer shaft（7）With truss frame （5）The second buffer spring is provided with the center line of the triangle of formation（13）, the second buffer spring（13）Two ends are respectively with delaying Rush axle（7）Junction and truss frame（5）It is fixedly connected.

10. automobile rear-end pre-crash system according to claim 1, it is characterised in that：Occupant's framework（8）On be connected with Luggage cover plate（14）, the luggage cover plate（14）Inside it is provided with inner support plate（15）, some inner support plates（15）In M shapes according to Secondary connection.