CN219838627U

CN219838627U - Buffering energy-absorbing mechanism suitable for air-drop vehicle

Info

Publication number: CN219838627U
Application number: CN202320109762.XU
Authority: CN
Inventors: 王文倩; 贺新恒; 樊晓都; 蔡文林; 周严均
Original assignee: Dongfeng Off Road Vehicle Co Ltd
Current assignee: Dongfeng Off Road Vehicle Co Ltd
Priority date: 2023-01-16
Filing date: 2023-01-16
Publication date: 2023-10-17
Anticipated expiration: 2033-01-16

Abstract

The utility model discloses a buffering and energy absorbing mechanism suitable for an air-drop vehicle, which comprises buffering and energy absorbing units which are symmetrically distributed at the bottom of a vehicle body floor, wherein each group of buffering and energy absorbing units comprises 2 floor buffering beams which are distributed in parallel along the width direction of the vehicle body. Two ends of the bottom of the floor buffer beam are respectively fixedly connected with adjacent floor beams by adopting a detachable design, the top of the floor buffer beam is contacted with the bottom of the floor, and the bottom of the floor buffer beam is contacted with the longitudinal beam of the cargo bed. When the air drop is carried out and the ground contacts, the impact force is transferred onto the floor buffer beam from the cargo bed longitudinal beam, and as the rigidity of the floor buffer beam is smaller than that of the floor, the inside of the floor buffer beam is of a cavity structure, and the floor buffer beam is deformed to a certain extent so as to absorb the impact energy. The buffering and energy-absorbing mechanism not only increases the rigidity of the whole floor, but also consumes energy caused by impact by a certain degree of deformation of the buffering and energy-absorbing unit, protects the floor from cracking and deformation, and realizes repeated air drop of the vehicle body by simply replacing the floor buffering Liang Bianke, thereby greatly reducing the air drop cost.

Description

Buffering energy-absorbing mechanism suitable for air-drop vehicle

Technical Field

The utility model belongs to the technical field of vehicle air drop devices, and particularly relates to a buffering and energy absorbing mechanism suitable for an air drop vehicle.

Background

In order to meet the combat demands of special terrains, the air drop type bearing off-road vehicle and the non-cargo platform system are thrown to the ground together from the air through a conveyor, and the self weight and high-altitude drop of the vehicle can cause huge impact force when the air drop vehicle lands, so that the vehicle body framework is irreversibly damaged. At present, most of impact protection devices for air-drop vehicles adopt air bag buffering and rocket buffering or adopt spring energy absorbing devices to absorb energy brought by large impact load, but the impact protection devices are used for carrying out large impact protection on the air-drop vehicles by utilizing external devices, and a mechanism for absorbing impact energy by utilizing devices in the vehicle body is lacking.

Because the impact is very large, the impact excitation is transmitted to the vehicle body through the cargo bed longitudinal beam of the cargo bed-free system, the traditional vehicle chassis inevitably generates partial plastic deformation, the air drop time requirement specified by the design cannot be met, and the impact force transmitted to the vehicle body from the cargo bed-free system is required to be absorbed by a special mechanism.

In addition, when the air-drop vehicle lands, in order to absorb the impact force of part vertical to the ground direction, the energy-absorbing mechanism designed on the vehicle body can be damaged to a certain extent to influence the normal driving function of the air-drop vehicle, so that the energy-absorbing mechanism needs to be subjected to repair welding or cutting replacement welding, and a great deal of time is required for the measures, so that soldiers are not exposed to danger for a long time as far as possible in order to cope with critical combat environments, and a buffering energy-absorbing mechanism capable of being conveniently disassembled and assembled is urgently required to be designed.

Disclosure of Invention

Aiming at the improvement demand in the prior art, the utility model provides a buffering energy-absorbing mechanism suitable for an air-drop vehicle to solve the problems.

In order to achieve the above object, the present utility model provides a buffering and energy absorbing mechanism suitable for an air-drop vehicle, comprising: the buffering and energy absorbing units are symmetrically distributed at the bottom of the vehicle body, and each group of buffering and energy absorbing units comprises 2 floor buffering beams which are distributed in parallel along the width direction of the vehicle body; the floor bumper beam and the cargo bed longitudinal beam are oppositely arranged along the height direction of the vehicle body, the bottom is contacted with the cargo bed longitudinal beam, two ends of the floor bumper beam and the cargo bed longitudinal beam are respectively fixedly connected with adjacent floor cross beams by adopting a detachable design, the top of the floor bumper beam and the bottom of the floor are contacted, the floor bumper beam is of a square tube structure, the rigidity of the floor bumper beam and the cargo bed longitudinal beam is smaller than that of the floor and the cargo bed longitudinal beam, and a cavity is formed inside the floor bumper beam and the cargo bed longitudinal beam.

Further, the floor bumper beam is made of an aluminum alloy material.

Further, the front end and the rear end of the bottom of the floor buffer beam are symmetrically provided with fixed lug seats, and the two ends of the floor buffer beam are fixed between adjacent floor beams through being matched with bolts.

Further, corrugated side plates are arranged on two sides of the floor buffer beam, and the corrugated side plates are of corrugated structures.

Further, the buffering and energy absorbing units are respectively provided with 4 groups on two sides of the power protection structure assembly, and 16 floor buffering beams are used for buffering and energy absorption.

In general, the above technical solutions conceived by the present utility model, compared with the prior art, enable the following beneficial effects to be obtained:

(1) The buffering and energy-absorbing mechanism increases the contact area of the cargo bed longitudinal beam and the car body floor beam of the cargo bed-free air-drop system, increases the rigidity of the floor beam, has certain strength and rigidity, and meanwhile, the buffering and energy-absorbing unit can deform to a certain extent to consume energy brought by impact, so that the floor is protected from cracking and deforming, the car body is prevented from being damaged, the air-drop car can be normally used after being landed, and the risk of soldiers being exposed in danger is reduced.

(2) According to the buffering and energy-absorbing mechanism, the front end and the rear end of the floor buffer beam are symmetrically provided with the fixed lug seats, the two ends of the floor buffer beam can be fixed between the adjacent floor cross beams through bolt matching, the buffering and energy-absorbing units can be quickly replaced and damaged through unscrewing the bolts during later maintenance, and the air-drop vehicle is buffered and protected again, so that repeated air-drop operation of the air-drop vehicle is realized, and the service life cycle of the air-drop vehicle is prolonged.

(3) The quick-dismounting buffering energy-absorbing mechanism is applied to an air-drop vehicle, and for the air-drop vehicle, the larger the self weight is, the larger the impact load is, so that the light weight factor is fully considered in design.

Drawings

FIG. 1 is a schematic diagram of a buffering and energy absorbing mechanism suitable for an air-drop vehicle in an embodiment of the present utility model;

FIG. 2 is a longitudinal cross-sectional view of a cargo bed rail in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic layout of an energy absorber unit according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a floor bumper beam according to an embodiment of the present utility model;

fig. 5 is a sectional view of a floor bumper beam D-D in accordance with an embodiment of the present utility model.

Like reference numerals denote like technical features throughout the drawings, in particular:

1-a vehicle body comprising: 101-floor cross beams, 102-floor longitudinal beams, 103-threshold beams, 104-middle bulge structure assemblies, 105-side walls, 106-power protection structure assemblies and 107-floors;

2-no cargo bed air drop system includes: 201-buffer air bags, 202-cargo bed longitudinal beams and 203-partition parts;

a 3-cushioning energy absorbing unit comprising: 31-floor bumper beams, 311-cavities, 312-corrugated side plates and 313-fixed lugs.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other. Herein, the left and right refer to the description of the orientation in the vehicle body width direction, and do not fully represent the actual situation.

As shown in fig. 1-5, the utility model provides a buffering and energy absorbing mechanism suitable for an air-drop vehicle, which comprises buffering and energy absorbing units 3 symmetrically distributed at the bottom of a vehicle body 1, wherein each group of buffering and energy absorbing units 3 comprises 2 floor buffering beams 31 distributed in parallel along the width direction of the vehicle body, two ends of the bottom of each floor buffering beam 31 are respectively fixedly connected with adjacent floor cross beams 101 by adopting a detachable design, and the top of each floor buffering beam is contacted with the bottom of a floor 107; the floor bumper beam 31 is of a square tube structure, the rigidity of the floor bumper beam is smaller than that of the floor 107, a cavity 311 is formed in the floor bumper beam, the energy absorbing unit 3 and the cargo bed longitudinal beam 202 of the cargo bed system 2 are oppositely arranged along the height direction of the vehicle body, and the bottom of the energy absorbing unit is in contact with the cargo bed longitudinal beam 202. At the landing moment of the air-drop vehicle, the buffer airbag 201 of the cargo bed system 2 absorbs a large amount of impact energy, and part of the impact energy is transferred to the buffer energy absorbing unit 3 along the cargo bed longitudinal beam 202, and the buffer energy absorbing unit 3 has the rigidity smaller than that of the floor 107 and is of a cavity structure inside, so that the buffer energy absorbing unit absorbs the impact energy through certain deformation, reduces the deformation of key structures of the vehicle body 1, and protects the floor 107 from cracking and deforming. According to the buffering and energy-absorbing mechanism, the contact area of the cargo bed longitudinal beam 201 and the car body floor beam of the cargo bed free air-drop system 2 is increased, the rigidity of the floor beam is increased, meanwhile, the buffering and energy-absorbing unit 3 can deform to a certain extent to consume energy brought by impact, the floor 107 is protected from cracking and deforming, the service life of the air-drop car is prolonged, the buffering and energy-absorbing unit 3 is better, the buffering and energy-absorbing unit 3 is detachably arranged between the two floor cross beams 101, repeated air-drop of the car can be achieved by simply replacing and damaging the buffering and energy-absorbing unit 3, the air-drop cost is greatly reduced, and the buffering and energy-absorbing mechanism has good economic effects and practicability.

As shown in fig. 1, in practical application, except that the energy absorbing unit 3 is a closed aluminum profile, the rest components are steel components, the vehicle body 1 comprises a floor 107 arranged at the bottom of the vehicle, the floor longitudinal beams 102 extend along the length direction of the vehicle body, the two floor longitudinal beams 102 are symmetrically arranged side by side along the width direction of the vehicle body, a middle bulge structure assembly 104 is arranged between the two floor longitudinal beams 102 and is used for installing a power assembly, and a power protection structure assembly 106 is installed below the power assembly and is fixedly connected with the bottom of the floor longitudinal beam 102. The side body 105 is welded with the threshold beam 103, the floor beams arranged between the threshold beam 103 and the floor longitudinal beam 102 extend along the width direction of the vehicle body, are arranged along the length direction of the vehicle body, and a buffering energy absorbing unit 3 is arranged between every two floor beams. A cushion airbag 201 of the cargo bed system 2 is arranged right below the power protection structure assembly 106, two cargo bed longitudinal beams 201 are arranged on two sides of the cushion airbag 201 respectively, and the top of each cargo bed longitudinal beam 201 is in contact with the bottom of the cushion energy absorption unit 3.

As shown in fig. 2, the cargo bed longitudinal beams 202 and the buffer energy absorbing units 3 are oppositely arranged along the height direction of the vehicle body, the top of the cargo bed longitudinal beam 202 is contacted with the bottom of the buffer energy absorbing units 3, in order to avoid that the impact force is directly transmitted from the cargo bed longitudinal beam 202 to the floor cross beam 101, and the floor cross beam 101 is deformed and damaged, a plurality of spacing parts 203 are arranged at the top of each cargo bed longitudinal beam 202, the arrangement positions of the spacing parts correspond to the floor cross beam 101, the groove structures are groove structures, the width of the groove width of the floor cross beam 101 along the length direction of the vehicle body is the same, the depth of the groove width is smaller than the height of the buffer energy absorbing units 3, and the spacing parts 203 are arranged, so that the cargo bed longitudinal beam 202 is prevented from contacting with the floor cross beam 101, and the impact force on the cargo bed longitudinal beam 202 is directly transmitted to the buffer energy absorbing units 3 for buffer energy absorption.

As shown in fig. 3, in the embodiment of the present utility model, the buffering and energy absorbing unit 3 disposed between two floor beams is composed of two floor buffer beams 31 disposed side by side along the width direction of the vehicle body, one buffering and energy absorbing unit 3 is disposed between each two floor beams, the buffering and energy absorbing units 3 are disposed along the length direction of the vehicle body and are bilaterally symmetrical, and the entire vehicle is provided with 8 buffering and energy absorbing units 3, namely 16 floor buffer beams 31.

In other embodiments of the utility model, the number of sets constituting the cushion energy absorbing units 3 corresponds to the number of floor beams 101, and the length of the floor cushion beams 31 is adjusted correspondingly according to the distance between the adjacent floor beams 101.

During assembly, the positions of the fixing holes on the floor cross beams 101 can be determined in advance according to the interval dimension of the left cargo bed longitudinal beam 202 and the right cargo bed longitudinal beam 202, the whole vehicle is welded except that the floor bumper beam 31 and the power protection structure assembly 106 are fixedly installed through bolts, after the welding process of the vehicle body is completed, the 16 floor bumper beams 31 are bolted between the two floor cross beams 101, then the power protection structure assembly 106 is bolted on the floor longitudinal beam 102 along the height direction of the vehicle body, finally the cargo bed free air drop system 2 is installed at the bottom of the vehicle body 1 and bolted on front and rear bumpers of the vehicle body, at the moment, the top of the cargo bed longitudinal beam 202 contacts with the bottom of the floor bumper beam 31, and after the assembly work is completed, the air drop work can be performed on the vehicle.

In the embodiment of the present utility model, as shown in fig. 3-5, the floor bumper beam 31 has a square tube structure, the front and rear ends of the bottom of the floor bumper beam are symmetrically provided with fixing lugs 313, the lugs respectively contact with the bottoms of the front and rear adjacent floor beams 101, the mounting holes of the lugs correspond to the mounting holes of the bottoms of the floor beams 101, and the two ends of the floor bumper beam 31 can be fixed between the adjacent floor beams 101 by matching with bolts, at this time, the top of the floor bumper beam 31 contacts the floor 107. The floor bumper beam 31 is internally provided with a cavity 311, two sides of the floor bumper beam are provided with corrugated side plates 312, the corrugated side plates 312 are of a corrugated structure, are similar to a spring structure, have a certain elastic modulus, and can buffer and absorb impact force through deformation. The floor bumper beam 31 is made of an aluminum alloy material, the rigidity of the floor bumper beam is smaller than that of the steel floor 107 and the cargo bed longitudinal beam 202, when the impact force is conducted, the floor bumper beam is deformed in preference to the floor 107 and the cargo bed longitudinal beam 202, after the impact energy is absorbed through self deformation, the impact force conducted to the vehicle body 1 is greatly reduced, the plastic deformation of a key structure of the vehicle body is avoided, meanwhile, the aluminum alloy density is smaller than that of steel, and the requirement of light weight of the whole vehicle is met.

The buffer energy-absorbing mechanism increases the contact area of the cargo bed longitudinal beam 201 of the cargo bed free air drop system 2 and the floor beam of the vehicle body, increases the rigidity of the floor beam, and meanwhile, the buffer energy-absorbing unit 3 can generate a certain degree of deformation to consume energy brought by impact, so that the floor 107 is protected from cracking and deforming, the vehicle body 1 is prevented from being damaged, the air drop vehicle can be normally used after falling to the ground, and the risk of exposing soldiers in danger is reduced.

According to the quick-disassembly buffering energy-absorbing mechanism, the front end and the rear end of the floor buffer beam 31 are symmetrically provided with the fixed lug bases 313, the two ends of the floor buffer beam 31 can be fixed between the adjacent floor cross beams 101 through being matched with the bolts, the damaged buffering energy-absorbing units 3 can be quickly replaced by unscrewing the bolts during later maintenance, the air-drop vehicle is buffered and protected again, repeated air-drop operation of the air-drop vehicle is realized, and the service life cycle of the air-drop vehicle is prolonged.

The quick-dismounting buffering energy-absorbing mechanism is applied to an air-drop vehicle, and for the air-drop vehicle, the larger the self weight is, the larger the impact load is, so that the light weight factor is fully considered in design.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the utility model and is not intended to limit the utility model, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. Buffering energy-absorbing mechanism suitable for air-drop vehicle, characterized by comprising: the buffer energy absorbing units (3) are symmetrically distributed at the bottom of the vehicle body (1), and each group of buffer energy absorbing units (3) comprises 2 floor buffer beams (31) which are distributed in parallel along the width direction of the vehicle body; the floor bumper beam (31) bottom and cargo bed longeron (202) contact, both ends adopt detachable design respectively with adjacent floor crossbeam (101) fixed connection, top and floor (107) bottom contact, it is square tube structure, rigidity is less than floor (107) and cargo bed longeron (202), and inside is equipped with cavity (311).

2. The buffering and energy absorbing mechanism for air-drop vehicles according to claim 1, characterized in that the floor bumper beam (31) is made of aluminum alloy material.

3. The buffering and energy absorbing mechanism for air-drop vehicles according to any one of claims 1-2, wherein the front and rear ends of the bottom of the floor bumper beam (31) are symmetrically provided with fixing lugs (313), and the two ends of the floor bumper beam (31) are fixed between adjacent floor beams (101) through cooperation with bolts.

4. The buffering and energy absorbing mechanism for air-drop vehicles according to any one of claims 1-2, wherein corrugated side plates (312) are arranged on two sides of the floor buffering beam (31), and the corrugated side plates (312) are of corrugated structures.

5. The buffering and energy absorbing mechanism suitable for the air-drop vehicle according to any one of claims 1-2, wherein 4 groups of the buffering and energy absorbing units (3) are respectively arranged on two sides of the power protection structure assembly (106), and a total of 16 floor buffering beams (31) are used for buffering and energy absorbing.