CN204688018U - A kind of elastic buffer and plasticity overturn parallel energy-absorbing assembly - Google Patents

A kind of elastic buffer and plasticity overturn parallel energy-absorbing assembly Download PDF

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CN204688018U
CN204688018U CN201520119071.3U CN201520119071U CN204688018U CN 204688018 U CN204688018 U CN 204688018U CN 201520119071 U CN201520119071 U CN 201520119071U CN 204688018 U CN204688018 U CN 204688018U
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thin wall
compress spring
cylindrical thin
wall parts
plasticity
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魏延鹏
谭克勤
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Institute of Mechanics of CAS
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Farsighted Earthquake Protection Science And Technology Ltd Of Yantai Ke Libo
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Abstract

The utility model relates to a kind of elastic buffer and plasticity overturns parallel energy-absorbing assembly, comprise cylindrical thin wall parts and Compress Spring, it is characterized in that, the center of described Compress Spring and the center of described cylindrical thin wall parts are on the same line, also comprise overturning seat, the boss that described overturning seat comprises pedestal and is connected as a single entity with described pedestal, circular sliding slopes between described boss and pedestal, one end of described cylindrical thin wall parts is sleeved on described boss, and the other end is free end; One end of described Compress Spring is fixedly connected with described boss, and the other end of described Compress Spring is force side, and described force side is stretched out outside the free end of described cylindrical thin wall parts.The beneficial effects of the utility model are, structure is simple, have buffering and energy-absorbing function, improve security protection performance.This structure compares plasticity conquassation flexing endergonic structure, has longer buffer distance and more stable energy absorption ability.

Description

A kind of elastic buffer and plasticity overturn parallel energy-absorbing assembly
Technical field
The utility model relates to buffering energy-absorbing technical field, particularly relates to a kind of elastic buffer and plasticity overturns parallel energy-absorbing assembly.
Background technology
Along with the development of the vehicle such as automobile, high speed train and improving constantly of running velocity, its crash survivability more and more receives the concern of people, because collision case can cause great personal injury and property damage, the problem must considered when collision problem has become the structure design such as automobile, high speed train.Another major issue in automobile, high speed train is exactly buffer problem, but when object bears slight impact or jolts, Buffer Unit can alleviate vibration by actv., reduces crash acceleration.The important difference of energy-absorbing and buffering is just, the distortion that energy-absorbing is formed utilizes the expendable deformation characteristic of structure to absorb energy often, and buffering is then utilize material and the recoverable distortion of structure to alleviate the release of energy.The buffer unit structure be applied at present on vehicle is more single, such as spring or hydraulic actuating cylinder etc., when the accident of meeting accident, need to slow down Impact energy rapidly, when even exchanging personal safety for by damage securing member, these shock absorbers are also difficult to be competent at, and simple energy absorbing component can not embody buffer action in normal operation, the function of energy absorbing component and buffer unit is not combined together preferably.
If collision energy-absorbing device can be combined with shock absorber, and make its energy absorbing component have longer, comparatively stablize energy-absorbing stroke, the impact energy of burst will be made to decompose in endergonic process, and then instantaneous huge impact energy is decomposed, will significantly improve the impact resistance of vehicle.
Utility model content
The utility model, for above-mentioned the deficiencies in the prior art, provides a kind of structure simple and has the elastic buffer of buffering and energy-absorbing function and plasticity overturns parallel energy-absorbing assembly.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of elastic buffer and plasticity overturn parallel energy-absorbing assembly, comprise cylindrical thin wall parts and Compress Spring, it is characterized in that, the center of described Compress Spring and the center of described cylindrical thin wall parts are on the same line, also comprise overturning seat, the boss that described overturning seat comprises pedestal and is connected as a single entity with described pedestal, circular sliding slopes between described boss and pedestal, one end of described cylindrical thin wall parts is sleeved on described boss, and the other end is free end; One end of described Compress Spring is fixedly connected with described boss, and the other end of described Compress Spring is force side, and described force side is stretched out outside the free end of described cylindrical thin wall parts.
The beneficial effects of the utility model are: the buffer capacity of elastomeric element and the energy absorption ability of plastic parts are organically integrated by the utility model, combination protective device of the present utility model is made both to have pooling feature, possess again the buffering energy-absorbing function made at burst accident, the security component be especially suitable as on hot-short uses.In normal service situation, Compress Spring provides pooling feature.And when there is sharp impacts, cylindrical thin wall parts utilize plasticity energy-absorbing and progressively overturn, consume collision energy; This structure compares plasticity conquassation flexing endergonic structure, has longer buffer distance and more stable energy absorption ability.By theoretical appraisal, this combination protective device can be combined at elastic buffer and the tilting force predictor formula in plasticity energy-absorbing stage, appropriate design can be made for different situations.This unitized design is conducive to meeting the requirement of vehicle light-weight design, containing a large amount of thin-wall constructions in vehicle body, the utility model is applied in the security protection performance that these thin-wall constructions can improve greatly car load.
On the basis of technique scheme, the utility model can also do following improvement.
Further, described Compress Spring is sleeved on the inside of described cylindrical thin wall parts.
Further, described Compress Spring is sleeved on the outside of described cylindrical thin wall parts.
Adopt the beneficial effect of above-mentioned further scheme to be described Compress Spring can be selected as required to be set with and configure with described cylindrical thin wall component locations, be convenient to save space.
Further, the force side of described Compress Spring is provided with back plate.
The beneficial effect of above-mentioned further scheme is adopted to be, the setting of back plate, make combination protective device of the present utility model not only be convenient to install and use, and can ensure that energy transmits along the axis of described Compress Spring, better play the effect of combination protective device energy-absorbing buffering.
Further, the transversal surface of described cylindrical thin wall parts is circular, ellipse, rectangle or polygon.
The beneficial effect of above-mentioned further scheme is adopted to be that difform selection is conducive to making different combination protective devices, adapts to the requirement of different installation site and function.
Further, described cylindrical thin wall parts are metal material.
The beneficial effect of above-mentioned further scheme is adopted to be that metal tubular thin wall component generally has stable progressive failure model under axial compression, is therefore more suitable for continuous energy-absorbing, dissolves severe impact.
The elastic buffer that described energy-absorbing assembly can carry can be
E e = 1 2 k ( L - L 1 ) 2
Wherein, k is the elastic coefficient, and L is the total length of Compress Spring free state, and L1 is the length of cylindrical thin wall parts;
The plasticity energy absorption ability of described energy-absorbing assembly is
E p = 2 π Y t D t / 2 ( L 1 - L 2 )
Wherein, Y is cylindrical thin wall component materials yield strength, and t is cylindrical thin wall parts wall thickness, and L2 is the length that Compress Spring is compressed to limit position, and D is thin circular cylinder diameter.
The beneficial effects of the utility model are: the buffer capacity of elastomeric element and the energy absorption ability of plastic parts are organically integrated by the utility model, combination protective device of the present utility model is made both to have pooling feature, possess again the buffering energy-absorbing function made at burst accident, the security component be especially suitable as on hot-short uses.In normal service situation, Compress Spring provides pooling feature.And when there is sharp impacts, cylindrical thin wall parts utilize plasticity energy-absorbing, consume collision energy.By theoretical appraisal, this combination protective device can be combined at elastic buffer and the conquassation tilting force predictor formula in plasticity energy-absorbing stage, appropriate design can be made for different situations.This unitized design is conducive to meeting the requirement of vehicle light-weight design, containing a large amount of thin-wall constructions in vehicle body, the utility model is applied in the security protection performance that these thin-wall constructions can improve greatly car load.
On the basis of technique scheme, the utility model can also do following improvement.
Further, described Compress Spring is sleeved on the inside of described cylindrical thin wall parts.
Further, described Compress Spring is sleeved on the outside of described cylindrical thin wall parts.
Adopt the beneficial effect of above-mentioned further scheme to be described Compress Spring can be selected as required to be set with and configure with described cylindrical thin wall component locations, be convenient to save space.
Further, the left end of described cylindrical thin wall parts is provided with adapter plate, and described Compress Spring and cylindrical thin wall parts are all fixed on described adapter plate, and the force side of described Compress Spring is provided with back plate.
The beneficial effect of above-mentioned further scheme is adopted to be, the setting of adapter plate and back plate, make combination protective device of the present utility model not only be convenient to install and use, and can ensure that energy transmits along the axis of described Compress Spring, better play the effect of combination protective device energy-absorbing buffering.
Further, the transversal surface of described cylindrical thin wall parts is circular, oval or polygon.
The beneficial effect of above-mentioned further scheme is adopted to be that difform selection is conducive to making different combination protective devices, adapts to the requirement of different installation site and function.
Further, described cylindrical thin wall parts are metal material.
The beneficial effect of above-mentioned further scheme is adopted to be that metal tubular thin wall component generally has stable progressive failure model under axial compression, is therefore more suitable for continuous energy-absorbing, dissolves severe impact.
Accompanying drawing explanation
Fig. 1 is combination protective device structure schematic diagram (initial condition) of the present utility model;
Fig. 2 is principle of work schematic diagram of the present utility model (the elastic buffer stage);
Fig. 3 is principle of work schematic diagram of the present utility model (plasticity energy-absorbing and the elasticity combined action stage);
Fig. 4 is principle of work schematic diagram of the present utility model (Compress Spring packing stage);
Fig. 5 of the present utility modelly has a kind of structural representation (spring is at cylindrical thin wall component outer);
Fig. 6 is combination protective device protection displacement curve schematic diagram of the present utility model.
In Fig. 1 ~ Fig. 5,1, cylindrical thin wall parts; 2, Compress Spring; 3, overturning seat; 3-1, boss; 4, back plate; R, be cylindrical thin wall part turnover radius.
Detailed description of the invention
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
As shown in Fig. 1 to Fig. 5, a kind of elastic buffer and plasticity overturn parallel energy-absorbing assembly, comprise cylindrical thin wall parts 1 and Compress Spring 2, the center of described Compress Spring 2 and the center of described cylindrical thin wall parts 1 are on the same line, also comprise overturning seat 3, the boss 3-1 that described overturning seat 3 comprises pedestal and is connected as a single entity with described pedestal, circular sliding slopes between described boss 3-1 and pedestal, one end of described cylindrical thin wall parts 1 is sleeved on described boss 3-1, and the other end is free end; One end of described Compress Spring 2 is fixedly connected with described boss 3-1, and the other end of described Compress Spring 2 is force side, and described force side is stretched out outside the free end of described cylindrical thin wall parts 1.
Described Compress Spring 2 is sleeved on the inside of described cylindrical thin wall parts 1.
The force side of described Compress Spring 2 is provided with back plate 4.
The transversal surface of described cylindrical thin wall parts 1 is circular, oval or polygon.
Described cylindrical thin wall parts 1 are metal material.Also non-metallic material can be adopted.
Principle of work of the present utility model is as follows:
Cylindrical thin wall parts 1, when being subject to enough pressure, can absorb considerable energy by plastic buckling, through reasonably designing, cylindrical thin wall parts can be made to have controollable failure mode, and comparatively pulsation-free conquassation upset load, is a kind of useful buffer structure.Compress Spring 2 is typical buffer units, has complete recoverable deformability.
The available elastic buffer of Compress Spring can be expressed as:
F e＝kx
Wherein Fe is cushion effect, and k is the elastic coefficient, and X is displacement.
The plasticity tilting force that cylindrical thin wall parts can provide is:
F P = 2 π Y t D t / 2
Wherein F pbe the average tilting forces of cylindrical thin wall parts, Y is cylindrical thin wall component materials yield strength, and t is cylindrical thin wall component thickness, and D is cylindrical thin wall component diameter.
As shown in Figure 1, be initial condition principle schematic of the present utility model.In figure, L is the drift of Compress Spring, and L1 is the length of cylindrical thin wall parts, and r is cylindrical thin wall part turnover radius.X represents the offset axis of horizontal direction.
The critical conversion of elastoplasticity of this energy-absorbing combination protective device is by Bit andits control, and elastoplasticity critical displacement is L-L1, and when displacement is less than L-L1, device shows as elastic buffer performance, and the distortion of this timer can recover completely.
As shown in Figures 2 and 3, when elastic compression displacement reaches L-L1, back plate and cylindrical thin wall component contact, make cylindrical thin wall parts plasticity overturn, thus absorb energy; When displacement is greater than L-L1, device shows as plasticity and elastomeric double action, and therefore tilting force is synthesized by the plasticity power of cylindrical thin wall parts and the elastic force of Compress Spring: namely
F = F e + F p = k x + 2 π Y t D t / 2
As described in Figure 4, when displacement continues to increase, device continues upset under the above conditions, till Compress Spring is compacted.Mechanism now loses energy absorption ability.L 2in theory for Compress Spring is compressed to the length of limit position, in practical application, also comprise the height of described boss.
As shown in Figure 6, combination protective device protection displacement curve schematic diagram of the present utility model, wherein, X represents the compression distance of horizontal direction, the power size that F representative combination protective device bears.Can find out, it is L-L that energy-absorbing combination protective device possesses total energy-absorbing displacement 2, wherein simple elastic buffer distance is L-L 1, as shown in Fe section in figure; The energy-absorbing distance with plasticity is L 1-L 2.The elastic buffer that combination protective device can carry can be:
E e = 1 2 k ( L - L 1 ) 2
As shown in Fp section in figure; The plasticity energy absorption ability of combination protective device is:
E p = 2 π Y t D t / 2 ( L 1 - L 2 )
The energy absorption ability of Fp section is elasticity and the combined action of plasticity energy absorption ability in the drawings.
Can also find out from above-mentioned analysis: by regulating tubular thin wall component diameter D and thickness t, and upset radius r, the average tilting force of tubular thin wall component flexing can be regulated, by regulating the tubular adjustable plastic buckling segment length of thin wall component length L1 and plasticity energy absorption ability.Adjustable elastic damping characteristics is carried out by adjustable elastic coefficient k, by regulating L adjustable elastic breeze way distance at elastic stage.
As shown in Figure 5, be another kind of embodiment of the present utility model, described Compress Spring is sleeved on the outside of described cylindrical thin wall parts, when specifically implementing, Compress Spring can be fixed on the outside of described cylindrical thin wall parts, when it overturns, overturn in the lump.It illustrates combination protective device structure schematic diagram of the present utility model, initial condition schematic diagram, elastic buffer phase principle figure, plasticity energy-absorbing and elasticity combined action phase principle schematic diagram, packing stage principle schematic successively.Its action principle is the same, repeats no more.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (6)

1. an elastic buffer and plasticity overturn parallel energy-absorbing assembly, comprise cylindrical thin wall parts and Compress Spring, it is characterized in that, the center of described Compress Spring and the center of described cylindrical thin wall parts are on the same line, also comprise overturning seat, the boss that described overturning seat comprises pedestal and is connected as a single entity with described pedestal, circular sliding slopes between described boss and pedestal, one end of described cylindrical thin wall parts is sleeved on described boss, and the other end is free end; One end of described Compress Spring is fixedly connected with described boss, and the other end of described Compress Spring is force side, and described force side is stretched out outside the free end of described cylindrical thin wall parts.
2. elastic buffer according to claim 1 and plasticity overturn parallel energy-absorbing assembly, it is characterized in that, described Compress Spring is sleeved on the inside of described cylindrical thin wall parts.
3. elastic buffer according to claim 1 and plasticity overturn parallel energy-absorbing assembly, it is characterized in that, described Compress Spring is sleeved on the outside of described cylindrical thin wall parts.
4. the elastic buffer according to any one of claims 1 to 3 and plasticity overturn parallel energy-absorbing assembly, it is characterized in that, the force side of described Compress Spring is provided with back plate.
5. the elastic buffer according to any one of claims 1 to 3 and plasticity overturn parallel energy-absorbing assembly, it is characterized in that, the transversal surface of described cylindrical thin wall parts is circular, oval or polygon.
6. elastic buffer according to claim 1 and plasticity overturn parallel energy-absorbing assembly, it is characterized in that: the elastic buffer that described energy-absorbing assembly can carry can be
Wherein, k is the elastic coefficient, and L is the total length of Compress Spring free state, L 1for the length of cylindrical thin wall parts;
The plasticity energy absorption ability of described energy-absorbing assembly is
Wherein, Y is cylindrical thin wall component materials yield strength, L 2for Compress Spring is compressed to the length of limit position, t is cylindrical thin wall parts wall thickness, and D is thin circular cylinder diameter.
CN201520119071.3U 2015-02-28 2015-02-28 A kind of elastic buffer and plasticity overturn parallel energy-absorbing assembly Active CN204688018U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104691466A (en) * 2015-02-28 2015-06-10 烟台科力博睿地震防护科技有限公司 Elastic buffering and plastic overturning parallel type energy absorption assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104691466A (en) * 2015-02-28 2015-06-10 烟台科力博睿地震防护科技有限公司 Elastic buffering and plastic overturning parallel type energy absorption assembly

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Effective date of registration: 20210205

Address after: 100190, No. 15 West Fourth Ring Road, Beijing, Haidian District

Patentee after: INSTITUTE OF MECHANICS, CHINESE ACADEMY OF SCIENCES

Address before: 264000 Ma Shan Street, Yantai High-tech Zone, Shandong Province, via No. 17 Eighth Road

Patentee before: YANTAI KELI BORUI EARTHQUAKE PROTECTION TECHNOLOGY Co.,Ltd.