CN208277997U - A kind of collision prevention girders buffer structure with rigidity compensation function - Google Patents

Abstract

The utility model belongs to safety guard for automobile, specifically a kind of collision prevention girders buffer structure with rigidity compensation function.The collision prevention girders buffer structure includes existing collision prevention girders and the buffer unit that is connect with existing collision prevention girders by tight first, second, third and fourth fastening buckle；The buffer unit includes successively from top to bottom upper articulamentum, with the articulamentum snapped connection and lower articulamentum；The articulamentum for having buckle is made of filled layer, and the number of filled layer is determined according to the size of actual vehicle model collision prevention girders, and the articulamentum with buckle successively includes the filled layer of respective number from top to bottom；The utility model is that a kind of structure is simple, it is easy for installation, strong applicability is capable of the collision prevention girders buffer structure with rigidity compensation function of effectively reducing collisions impact force, and solving the problems, such as the safety protection structure of existing automobile front, that there are impact resistances is poor, rigidity is inconsistent, collision prevention girders are easily damaged.

Description

A kind of collision prevention girders buffer structure with rigidity compensation function

Technical field

The utility model belongs to safety guard for automobile, specifically a kind of collision prevention girders with rigidity compensation function Buffer structure.

Background technique

When traffic accident occurs, pedestrian is generally in weak position, is subject to various injuries.Therefore, the guarantor of automobile Dangerous thick stick system design just needs to protect pedestrian.But the front bumper system of automobile will also meet each of low speed collision relevant laws and regulations Kind requires.There are certain paradoxes for both, therefore, pedestrian protecting and automobile low speed collision are taken into account by reasonably designing With regard to particularly significant.

In vehicle currently on the market, the safety device of automobile front and rear portions is consisted of three parts, for insurance Thick stick shell, buffering energy-absorbing material, collision prevention girders.Buffering energy-absorbing material therein by white foam filling, although cost is relatively just It preferably, can only be that there is protective effect under the environment of extremely low speed but to the protective effect of interior driver and occupant but very little, Once colliding under high-speed cruising, effect is just very little；Collision prevention girders are a kind of devices by absorbing collision energy, It is made of girder, energy-absorption box, mounting plate, when lesser shock occurs, collision prevention girders be can reduce to vehicle and interior driver With the injury of occupant, but can generate girder wound, girder pit and the problems such as energy-absorption box reduced service life.

Therefore, a kind of novel collision protection beam buffer structure can be designed to replace buffering energy-absorbing material, to protect vehicle and row People's safety, reduces loss.

Summary of the invention

It is simple that the utility model provides a kind of structure, easy for installation, and strong applicability being capable of effective reducing collisions impact force The collision prevention girders buffer structure with rigidity compensation function, solving the safety protection structure of existing automobile front, there are anti-impacts Hit the problem that ability is poor, front rigidity is inconsistent, collision prevention girders are easily damaged.

Technical solutions of the utility model are described with reference to the drawings as follows:

A kind of collision prevention girders buffer structure with rigidity compensation function, the collision prevention girders buffer structure include multiple modules, In the module include passing through the tight first buckle the 2, second fastening buckle 5, third fastening buckle admittedly with existing collision prevention girders 1 22 and the 4th fastening buckle 25 connect buffer unit；The buffer unit includes successively from top to bottom upper articulamentum 8, has The articulamentum and lower articulamentum 17 snapped connection；The articulamentum for having buckle is made of multiple filled layers, the tool The articulamentum for having buckle successively includes the first filled layer 9, the second filled layer 10 ... N filled layer from top to bottom；Described is upper The buckle of articulamentum 8 is embedded in the card slot of 9 corresponding position of the first filled layer；The buckle of first filled layer 9 is embedded in In the card slot of second filled layer, 10 corresponding position；The buckle of the N-1 filled layer is embedded in N filled layer corresponding position In card slot；The buckle of the N filled layer is embedded in the card slot of lower 17 corresponding position of articulamentum.

It is 14mm × 7mm that the side of the upper articulamentum 8 and lower articulamentum 17, which is opened there are two cross-sectional area, and depth is 60mm, wall thickness are the connecting hole of 3mm；At the side of the connecting hole, one end 10mm close apart from existing collision prevention girders 1 and 20mm It is 3.5mm that place, which is provided with height, and diameter is the through-hole of 2.5mm.

The upper articulamentum 8, with the articulamentum snapped connection and the lower long 700mm in 17 middle section of articulamentum, it is wide 65mm, it is 100mm that front, which is adopted as muscle width, is highly 7 ripples of the ripple struction of 5mm, two sides are respectively long 350mm, wide The parallelogram sturcutre of 60mm；Described first buckle admittedly 2 and the second middle section between fastening buckle 5 be having a size of The honeycomb of 8mm；The parallelogram sturcutre is the honeycomb having a size of 13mm；Described first buckles 2 Hes admittedly It is transition portion between the both ends of middle section between second fastening buckle 5 and two parallelogram sturcutres；The mistake Crossing part is the honeycomb having a size of 10mm；The wall thickness of the honeycomb is 2mm.

The upper articulamentum 8 and lower articulamentum 17 with a thickness of 10mm；12 cards are provided on the upper articulamentum 8 Slot；12 buckles are provided on the lower articulamentum 17.

First filled layer 9, the second filled layer 10 ... are provided with 12 buckles and 12 cards on N filled layer Slot.

Card base portion cross-sectional area 14mm × 2mm, the long 4mm of the buckle, buckle retention bead part it is trapezoidal on Side length 2mm, lower side length 5mm, a height of 3mm, with a thickness of 14mm.

Described first buckle admittedly 2 and second fastening buckle 5 card base portion cross-sectional area 14mm × 7mm, long 90mm, the One admittedly buckle 2 and second fastening buckle 5 retention bead part trapezoidal upper side length 7mm, lower side length 17mm, a height of 5mm, thickness For 14mm.

The buffer unit uses the plastic material of polycarbonate or polybutylene terephthalate (PBT).

The utility model has the following beneficial effects:

1, the utility model uses modularized design, is classified as being known as connecting with the buffer structure snapped connection Layer, is known as filled layer for the buffer structure of fixed thickness, using two pieces of articulamentums and corresponds to number for the bumper of different height The filled layer of amount and the buffer unit for being connected by a snap to form.The universality of this enhancing this product, enables this buffer structure Enough bumpers for adapting to most of vehicle, make it have versatility.

2, the connection of the buffer unit and bumper of the utility model use permanent type connection buckle, by articulamentum with The fast permanent type connection buckle of snap lock, is fixed on bumper, enhances the safety of product.

3, the front of articulamentum and filled layer is ripple struction in the buffer unit of the utility model, when it is fitted together When the front of buffer unit can be considered as corrugated plating, this configuration increases the lateral rigidity of buffer unit, make it have compared with High bearing capacity and stability.

4, the utility model uses muscle width and enhances the bearing capacity and resistance of buffer unit for the ripple struction of 100mm Collision bring harm, damage of the reducing collisions to personnel and vehicle is effectively reduced in shape ability.And from processing technology angle and Speech, since ripple number is fewer, then processing technology is relatively simple, high yield rate, lower production costs.

5, the inside of the articulamentum of the utility model and filled layer is honeycomb, honeycomb is light-weight, with material it is few, at This is low；Shock resistance, resiliency are good；It simultaneously can also sound insulation heat absorption.

6, the utility model can be effectively reduced collision bring harm, worked as generation due to the buffer function of honeycomb When low speed collision, elastic potential energy can be converted kinetic energy into, collision bring impact is effectively relieved, simultaneously as plastic material Characteristic, can produce spring back and act on bumper, can protect bumper and big deformation do not occur；When generation higher speed Collision when, buffer structure can produce deformation and even crush, and effectively increase the buffer distance of vehicle, and reduce that collision generates rushes Hit power, damage of the reducing collisions to personnel and vehicle.

7, for the utility model in the filled layer and articulamentum of buffer structure, intermediate position has used the bee having a size of 8mm Nest structure, two sides use the honeycomb having a size of 13mm, and transition uses the honeycomb having a size of 10mm.And bee The quality of loads of nest structure is reduced than the increase with cell dimensions, so the rigidity characteristic of buffer structure is intermediate high two sides It is low.The honeycomb for using different sizes and density in different location in buffer structure, makes its rigidity characteristic and vehicle Bumper on the contrary, be therefore consistent the rigidity of the front totality of vehicle, in low speed collision, positive function and effect It is more significant, effective protection vehicle and pedestrian.

8, the plastic alloy of the utility model uses polycarbonate and polybutylene terephthalate (PBT), the material have Higher surface hardness, higher rigidity and toughness also have the ability of higher shape resistant to high temperatures, also there is higher anti-stress cracking Ability.

Detailed description of the invention

Fig. 1 is the axonometric schematic diagram of buffer unit in the utility model；

Fig. 2 is the schematic top plan view of buffer unit in the utility model；

Fig. 3 is the elevational schematic view of buffer unit in the utility model；

Fig. 4 is the perspective view of the explosion of buffer unit in the utility model；

Fig. 5 is the axonometric schematic diagram of lower articulamentum in the utility model；

Fig. 6 is the axonometric schematic diagram of upper articulamentum in the utility model；

Fig. 7 is the axonometric schematic diagram that this hair hits filled layer；

Fig. 8 is the schematic rear view of lower articulamentum in the utility model；

Fig. 9 is the structural schematic diagram of buffer unit in the utility model；

Figure 10 is the structural schematic diagram of buckle and card slot in the utility model；

Figure 11 is the connected mode schematic diagram of fastening buckle in the utility model；

Figure 12 is the axonometric schematic diagram of fastening buckle in the utility model；

Figure 13 is vehicle low speed collision simplified model figure

Figure 14 is vehicle low speed longitudinal centering impact curve figure；

Figure 15 is vehicle low speed " vehicle angle " impact curve figure；

Figure 16 is that traffic collides simplified model figure

Figure 17 is that traffic collides shin bone acceleration test result figure

Figure 18 is that traffic collides knee flexion angles experimental result picture

Figure 19 is that traffic collides knee joint shear displacemant experimental result picture

In figure: 1, collision prevention girders；2, the first solid buckle；3, the first bolt；4, the second bolt；5, the second fastening buckle；6, Three bolts；7, the 4th bolt；8, upper articulamentum；9, the first filled layer；10, the second filled layer；11, third filled layer；12, the 4th Filled layer；13, the 5th filled layer；14, the 6th filled layer；15, the 7th filled layer；16, the 8th filled layer；17, lower articulamentum； 18, the first nut；19, the second nut；20, third nut；21, the 4th nut；22, third fastening buckle；23, the 5th bolt； 24, the 6th bolt；25, the 4th fastening buckle；26, the 7th bolt；27, the 7th bolt；28, the 5th nut；29, the 6th nut； 30, the 7th nut；31, the 8th nut.

Specific embodiment

The utility model can be applicable in multiple types, a variety of height, the collision prevention girders of multi-thickness with its modularized design, fill out Layer number is filled to be determined according to the size of actual vehicle model collision prevention girders.The present embodiment is by taking 2011 sections of Guangzhou Automobile Workshops' biographies are auspicious as an example, anticollision deck-siding Degree is 100mm or so, with a thickness of 30mm or so.

Refering to fig. 1-Fig. 4, Fig. 6, Fig. 9, a kind of collision prevention girders buffer structure with rigidity compensation function, the collision prevention girders are slow Rushing structure includes multiple modules, can select corresponding module number according to actual vehicle model.Wherein each module includes Buckle what the 2, second fastening buckle 5, third fastening buckle 22 and the 4th fastening buckle 25 were connect admittedly by tight first with collision prevention girders 1 Buffer unit；The buffer unit includes successively from top to bottom upper articulamentum 8, with the articulamentum snapped connection and lower connection Layer 17；The articulamentum for having buckle successively includes the first filled layer 9, the second filled layer 10, third filling from top to bottom The 11, the 4th filled layer 12 of layer, the 5th filled layer 13, the 6th filled layer 14, the 7th filled layer 15 and the 8th filled layer 16；Described The buckle of upper articulamentum 8 is embedded in the card slot of 9 corresponding position of the first filled layer；The buckle of first filled layer 9 is embedded in In the card slot of 10 corresponding position of the second filled layer；It is corresponding that the buckle of second filled layer 10 is embedded in third filled layer 11 In the card slot of position；The buckle of the third filled layer 11 is embedded in the card slot of 12 corresponding position of the 4th filled layer；It is described The buckle of the 4th filled layer 12 be embedded in the card slot of 13 corresponding position of the 5th filled layer；The card of 5th filled layer 13 Button is embedded in the card slot of 14 corresponding position of the 6th filled layer；The buckle of 6th filled layer 14 is embedded in the 7th filled layer In the card slot of 15 corresponding positions；The buckle of 7th filled layer 15 is embedded in the card slot of 16 corresponding position of the 8th filled layer In；The buckle of 8th filled layer 16 is embedded in the card slot of lower 17 corresponding position of articulamentum.

Refering to Fig. 6, there is 2 cross-sectional area 14mm × 7mm on the upper articulamentum 8, depth 60mm, wall thickness is The connecting hole of 3mm.

Refering to Fig. 8, Figure 11, there is also the holes of same size on the lower articulamentum 17, and on connecting hole, distance is anti- It hits at the close one end 10mm of beam and at 20mm, is highly 3.5mm there are this, diameter is the through-hole of 2.5mm.By buffer unit back With the fronts of collision prevention girders to tight, the connection structure of buffer unit and collision prevention girders, the connection in the left side of the above articulamentum 8 are then established For hole, the first fastening buckle 2 is inserted into connecting hole, while the buckle portion end surface of the first fastening buckle 2 abutting is existing The back side of collision prevention girders 1, while using two through-holes of puncher alignment connecting hole, it is inserted into connects in the first fastening buckle 8 respectively The through-hole of two 2.5m is got in the part in hole, then the first bolt 3 and the second bolt 4 inserts in the hole respectively, in shank of bolt The other side is fastened using the first nut 18 and the second nut 19, and structure is as shown in figure 11.Using same method, exist respectively Upper connection uses the second fastening buckle 5, third bolt 6, the 4th bolt 7, third nut 20, the 4th spiral shell on 8 another connecting hole Mother 21 is fastened.Third fastening buckle 22, the 4th fastening buckle 25, the 5th bolt the 23, the 6th are used on lower articulamentum 17 Bolt 24, the 7th bolt 26, the 8th bolt 27, the 5th nut 28, the 6th nut 29, the 7th nut 30, the 8th nut 31 carry out Fastening.

It is the upper articulamentum 8, long with the articulamentum snapped connection and lower 17 middle section of articulamentum refering to Fig. 6 700mm, wide 65mm, it is 100mm that front, which is adopted as muscle width, is highly 7 ripples of the ripple struction of 5mm, and two sides are respectively to grow 350mm, the parallelogram sturcutre of wide 60mm；Described first buckle admittedly 2 and the second middle section between fastening buckle 5 be Honeycomb having a size of 8mm；The parallelogram sturcutre is the honeycomb having a size of 13mm；The solid card of described first It is transition portion between the both ends and two parallelogram sturcutres of middle section between button 2 and the second fastening buckle 5；It is described Transition portion be the honeycomb having a size of 10mm；The wall thickness of the honeycomb is 2mm.

Refering to Fig. 5, Fig. 6, Fig. 8, the upper articulamentum 8 and lower articulamentum 17 with a thickness of 10mm；The upper connection 12 card slots are provided on layer 8；12 buckles are provided on the lower articulamentum 17.

Refering to Fig. 4, Fig. 7, first filled layer 9, the second filled layer 10, third filled layer 11, the 4th filled layer 12, 12 buckles and 12 are provided on 5th filled layer 13, the 6th filled layer 14, the 7th filled layer 15 and the 8th filled layer 16 Card slot.

Refering to fig. 10, card base portion cross-sectional area 14mm × 2mm, the long 4mm of the buckle buckle retention bead part Trapezoidal upper side length 2mm, lower side length 5mm, a height of 3mm, with a thickness of 14mm.

1, Figure 12 refering to fig. 1, described first admittedly buckle 2 and second fastening buckle 5 card base portion cross-sectional area 14mm × 7mm, long 90mm, first admittedly buckle 2 and second fastening buckle 5 retention bead part trapezoidal upper side length 7mm, lower side length 17mm, a height of 5mm, with a thickness of 14mm.

The buffer unit uses the plastic alloy of polycarbonate and polybutylene terephthalate (PBT).

It is as follows that emulation experiment is done with the collision prevention girders buffer structure:

It is limited by impact velocity, vehicle low speed collision performance is mainly determined by vehicle front bumper system, rear vehicle end It influences minimum.Establish simplified model shown in Figure 13.In terms of experimental condition, this testing program is according to national standard " GB 17354-1998 automobile front and back ends protective device " it formulates.Front is that collision impact device chooses the speed for colliding 8km/h, together When, the finite element model of foam endergonic structure and the collision prevention girders buffer structure of the application is fixedly installed in bumper skin respectively Between collision prevention girders.Establish vehicle low speed collision finite element model, and establish corresponding connection relationship, respectively carry out central collision and The l-G simulation test that angle is touched.

The data that emulation obtains are optimized, the simulation experiment result is as shown in Figure 14, Figure 15.

By Figure 14, Figure 15 it is found that installation conventional foam buffer structure bumper intrusion volume be divided into 62.56mm, 53.42mm, and the bumper intrusion volume of New Buffering structure is used to have reduction by a relatively large margin, value becomes respectively 55.26mm, 50.23mm meet the requirement of regulation limit value 65mm；It can thus be seen that the collision prevention girders buffer structure of the application Energy-absorbing effect is better than conventional foam buffer structure, is more advantageous to the protection of bumper rear end Main Auto components.It simultaneously can be with Find out that the bumper intrusion volume numerical value change trend of the collision prevention girders buffer structure of the application is not much different, has preferably embodied it just The advantages of degree compensation.Also meet the various requirement of low speed collision relevant laws and regulations.

When pedestrian impact occurs, general pedestrian is only in contact with front of the car.And since speed is smaller, generated energy Amount is smaller, and front of the car is enough to absorb impact bring energy, and rear vehicle end is not deformed substantially.Therefore, it establishes such as figure The simplified model of the collision of traffic shown in 16.In terms of experimental condition, this testing program is according to " GB/T24550.2009 vapour Crash protection of the vehicle to pedestrian " in requirement select strictly by EEVC laws and regulations requirement establish TRL-LFI type impact on lower legs device mould Type, meanwhile, the finite element model of foam endergonic structure and the collision prevention girders buffer structure of the application is fixedly installed in insurance respectively Between thick stick shell and collision prevention girders.And the initial velocity collision insurance thick stick portion of shank impactor 40km/h is assigned according to test requirements document Position establishes traffic collision finite element model, and establishes corresponding connection relationship, carries out l-G simulation test.

The data that emulation obtains are optimized, the simulation experiment result is as shown in Figure 17, Figure 18, Figure 19.

By Figure 17, Figure 18, Figure 19 it is found that the shin bone acceleration peak value of shank impactor is very when installing foam buffer structure additional It greatly, is 178.25g, and when installing the collision prevention girders buffer structure of the application additional, the shin bone acceleration peak value of shank impactor significantly subtracts Small is 112.3g, meets laws and regulations requirement within 150g；When installing foam buffer structure additional, the knee joint bending angle of shank impactor When it is very big to spend peak value, is 8.52 °, and installing the collision prevention girders buffer structure of the application additional, the knee flexion angles of shank impactor It is 7.56 ° that peak value, which is substantially reduced, meets the requirement within 15 ° of regulation；When installing foam buffer structure additional, the knee of shank impactor Joint shear displacemant peak value is very big, is 2.95mm, and when installing the collision prevention girders buffer structure of the application additional, the knee of shank impactor closes Section shear displacemant peak value is substantially reduced as 2.73mm, meets the requirement within regulation 6mm.In conclusion the anticollision of the application Performance of the beam buffer structure in terms of pedestrian protecting has compared with foam buffer structure and largely improves, and preferably meets Laws and regulations requirement.

Claims (8)

1. a kind of collision prevention girders buffer structure with rigidity compensation function, which is characterized in that the collision prevention girders buffer structure includes more A module, wherein each module includes passing through the tight first solid buckle (2), the second fastening buckle with existing collision prevention girders (1) (5), the buffer unit of third fastening buckle (22) and the connection of the 4th fastening buckle (25)；The buffer unit from top to bottom according to Secondary includes upper articulamentum (8), with the articulamentum snapped connection and lower articulamentum (17)；The described articulamentum with buckle by Multiple filled layers are constituted, and the articulamentum with buckle successively includes the first filled layer (9), the second filled layer from top to bottom (10) ... N filled layer；The buckle of the upper articulamentum (8) is embedded in the card slot of the first filled layer (9) corresponding position； The buckle of first filled layer (9) is embedded in the card slot of the second filled layer (10) corresponding position；The N-1 filling The buckle of layer is embedded in the card slot of N filled layer corresponding position；The buckle of the N filled layer is embedded in lower articulamentum (17) in the card slot of corresponding position.

2. a kind of collision prevention girders buffer structure with rigidity compensation function according to claim 1, which is characterized in that described Upper articulamentum (8) and lower articulamentum (17) side open there are two cross-sectional area be 14mm × 7mm, depth 60mm, wall Thickness is the connecting hole of 3mm；It opens at the side of the connecting hole, one end 10mm close apart from existing collision prevention girders (1) and at 20mm Having height is 3.5mm, and diameter is the through-hole of 2.5mm.

3. a kind of collision prevention girders buffer structure with rigidity compensation function according to claim 1, which is characterized in that described Upper articulamentum (8), with the articulamentum snapped connection and lower articulamentum (17) middle part bit length 700mm, wide 65mm, front is adopted It is 100mm for muscle width, is highly 7 ripples of the ripple struction of 5mm, two sides is respectively long 350mm, parallel four side of wide 60mm Shape structure；Middle section between the solid buckle (2) of described first and the second fastening buckle (5) is the honeycomb knot having a size of 8mm Structure；The parallelogram sturcutre is the honeycomb having a size of 13mm；The solid buckle (2) of described first and the second fastener Detaining is transition portion between the both ends and two parallelogram sturcutres of the middle section between (5)；The transition portion is Honeycomb having a size of 10mm；The wall thickness of the honeycomb is 2mm.

4. a kind of collision prevention girders buffer structure with rigidity compensation function according to claim 1, which is characterized in that described Upper articulamentum (8) and lower articulamentum (17) with a thickness of 10mm；12 card slots are provided on the upper articulamentum (8)；Institute 12 buckles are provided on the lower articulamentum (17) stated.

5. a kind of collision prevention girders buffer structure with rigidity compensation function according to claim 1, which is characterized in that described The first filled layer (9), the second filled layer (10) ... be provided on N filled layer 12 buckle and 12 card slots.

6. a kind of collision prevention girders buffer structure with rigidity compensation function according to claim 1, which is characterized in that described Buckle card base portion cross-sectional area 14mm × 2mm, long 4mm, buckle retention bead part trapezoidal upper side length 2mm, below Long 5mm, a height of 3mm, with a thickness of 14mm.

7. a kind of collision prevention girders buffer structure with rigidity compensation function according to claim 1, which is characterized in that described The first solid buckle (2) and the second fastening buckle (5) the solid buckle of card base portion cross-sectional area 14mm × 7mm, long 90mm, first (2) and the trapezoidal upper side length 7mm of the retention bead part of the second fastening buckle (5), lower side length 17mm, a height of 5mm, with a thickness of 14mm。

8. a kind of collision prevention girders buffer structure with rigidity compensation function according to claim 1, which is characterized in that described Buffer unit use polycarbonate and polybutylene terephthalate (PBT) plastic alloy.