CN204688025U - A kind of elastic buffer and plastic buckling tandem energy-absorbing assembly - Google Patents

Abstract

The utility model relates to a kind of elastic buffer and plastic buckling tandem energy-absorbing assembly, comprise cylindrical thin wall parts and Compress Spring, it is characterized in that, one end of described Compress Spring is fixedly connected with one end of described cylindrical thin wall parts, the other end of described cylindrical thin wall parts is fixed installation end, and the other end of described Compress Spring is force side.The fixed installation end of described cylindrical thin wall parts is provided with adapter plate, is fixedly connected with between described Compress Spring with cylindrical thin wall parts by connecting panel, and the force side of described Compress Spring is provided with back plate.The beneficial effects of the utility model are, structure is simple, have buffering and energy-absorbing function, improve security protection performance.

Description

A kind of elastic buffer and plastic buckling tandem energy-absorbing assembly

Technical field

The utility model relates to buffering energy-absorbing technical field, particularly relates to a kind of elastic buffer and plastic buckling tandem 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, under the prerequisite meeting vehicle safety performance, can significantly improve the requirement of vehicle light-weight design.

Utility model content

The utility model, for above-mentioned the deficiencies in the prior art, provides a kind of structure simple and has elastic buffer and the plastic buckling tandem energy-absorbing assembly of buffering and energy-absorbing function.

The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of elastic buffer and plastic buckling tandem energy-absorbing assembly, comprise cylindrical thin wall parts and Compress Spring, it is characterized in that, one end of described Compress Spring is fixedly connected with one end of described cylindrical thin wall parts, the other end of described cylindrical thin wall parts is fixed installation end, and the other end of described Compress Spring is force side.

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, assembly of the present utility model is made both to have pooling feature, possess again the buffering energy-absorbing function 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, can combine component at elastic buffer and the crushing 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, the fixed installation end of described cylindrical thin wall parts is provided with adapter plate, is fixedly connected with between described Compress Spring with cylindrical thin wall parts by connecting panel, 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, connecting panel and back plate, make assembly 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 assembly 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 assemblies, 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:

$E_e=\frac{1}{2}k{(L_1-L_2)}^2$

Wherein, k is the elastic coefficient, L ₁for the drift of Compress Spring, Compress Spring compacting length is L _2.。

The plasticity energy absorption ability that described energy-absorbing assembly can carry is:

$E_p=18.15Y{t}^2{(D/t)}^{\frac{1}{3}}(L-L_3)$

Wherein, 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, and L is the length of cylindrical thin wall parts, L ₃represent that cylindrical thin wall parts are by the length of compressive deformation to the limit.

Accompanying drawing explanation

Fig. 1 is unit construction schematic diagram of the present utility model;

Fig. 2 is principle of work schematic diagram (initial condition) of the present utility model;

Fig. 3 is principle of work schematic diagram of the present utility model (the elastic buffer stage);

Fig. 4 is principle of work schematic diagram of the present utility model (the plasticity energy-absorbing stage);

Fig. 5 is principle of work schematic diagram (packing stage) of the present utility model;

Fig. 6 is crushing force displacement curve schematic diagram of the present utility model.

In Fig. 1 ~ Fig. 6,1, cylindrical thin wall parts; 2, Compress Spring; 3, adapter plate; 4, connecting panel; 5, back plate.

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 plastic buckling tandem energy-absorbing assembly, comprise cylindrical thin wall parts 1 and Compress Spring 2, one end of described Compress Spring is fixedly connected with one end of described cylindrical thin wall parts, the other end of described cylindrical thin wall parts is fixed installation end, and the other end of described Compress Spring is force side.

The fixed installation end of described cylindrical thin wall parts is provided with adapter plate 3, is fixedly connected with between described Compress Spring with cylindrical thin wall parts by connecting panel 4, and the force side of described Compress Spring is provided with back plate 5.

The transversal surface of described cylindrical thin wall parts is circular, ellipse, rectangle or polygon.

Described cylindrical thin wall parts are metal material.Also can be other plastic material.

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, and through reasonably designing, cylindrical thin wall parts have controollable failure mode, comparatively pulsation-free crush loads, are a kind of useful buffer structures.Compress Spring is typical Buffer Unit, has complete recoverable deformability.

The available elastic buffer of Compress Spring can be expressed as:

F _t＝kx

Wherein F _tfor cushion effect, k is the elastic coefficient, and x is displacement.

The plasticity crushing force that cylindrical thin wall parts can provide is:

$F_{\mathrm{av}}=F_L=18.15Y{t}^2{(D/t)}^{\frac{1}{3}}$

Wherein F _avthe average crushing forces of cylindrical thin wall parts, F _lassembly elastoplasticity transforms critical force, and 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.

The critical conversion of elastoplasticity of this energy-absorbing assembly has crushing force to control, and chooses F _lfor critical conversion power.When

F _t＜F _L

Now, energy-absorbing assembly shows as elastic buffer performance, and at this moment component strain can recover completely.

As shown in Figure 2, be initial condition principle schematic of the present utility model.In figure, L is the length of cylindrical thin wall parts, L ₁for the drift of Compress Spring.X represents the offset axis of horizontal direction.

As shown in Figure 3, for assembly of the present utility model is in the principle of work schematic diagram in elastic buffer stage.

As shown in Figure 4, Compress Spring compacting length is L ₂, by optimal design, make this moment acting force of the spring just equal with critical conversion power, if assembly continues compression, then have

F _t≥F _L

Now, energy-absorbing assembly shows as plasticity energy absorption characteristics, the plasticity crushing force of meeting stable output.

$F_{\mathrm{av}}=18.15Y{t}^2{(D/t)}^{\frac{1}{3}}$

Wherein L ₂represent the length being compressed to the limit of Compress Spring.

Energy-absorbing assembly continues conquassation at plastic compression stages, until the compacting of cylindrical thin wall parts, energy-absorbing assembly now loses energy absorption ability.

As shown in Figure 5, for energy-absorbing assembly of the present utility model is in the principle of work schematic diagram of compaction state.Wherein L ₂represent the length being compressed to the limit of Compress Spring; L ₃represent that cylindrical thin wall parts are by the length of compressive deformation to the limit.

As shown in Figure 6, be crushing force displacement curve schematic diagram of the present utility model, wherein, X represents the compression distance of horizontal direction, the power size that F proxy component bears.Can find out, it is L+L that energy-absorbing assembly possesses total energy-absorbing displacement ₁-L ₂-L ₃, wherein elastic buffer distance is L ₁-L ₂, plasticity energy-absorbing distance is L-L ₃.The elastic buffer that assembly can carry can be:

$E_e=\frac{1}{2}k{(L_1-L_2)}^2$

The plasticity energy absorption ability of assembly is:

$E_p=18.15Y{t}^2{(D/t)}^{\frac{1}{3}}(L-L_3)$

Can also find out from above-mentioned analysis: by regulating diameter and the thickness of tubular thin wall component, can regulate the average crushing force of tubular thin wall component flexing, namely elastoplasticity transforms critical force F _l.By regulating the tubular adjustable plastic buckling segment length of thin wall component length L and plasticity energy absorption ability.

At specific F _lwhen, carry out adjustable elastic damping characteristics at elastic stage by adjustable elastic coefficient k, by regulating L ₁adjustable elastic breeze way distance.

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 (4)

1. an elastic buffer and plastic buckling tandem energy-absorbing assembly, comprise cylindrical thin wall parts and Compress Spring, it is characterized in that, one end of described Compress Spring is fixedly connected with one end of described cylindrical thin wall parts, the other end of described cylindrical thin wall parts is fixed installation end, and the other end of described Compress Spring is force side.

2. elastic buffer according to claim 1 and plastic buckling tandem energy-absorbing assembly, it is characterized in that, the fixed installation end of described cylindrical thin wall parts is provided with adapter plate, be fixedly connected with by connecting panel between described Compress Spring with cylindrical thin wall parts, the force side of described Compress Spring is provided with back plate.

3. elastic buffer according to claim 1 and 2 and plastic buckling tandem energy-absorbing assembly, is characterized in that, the transversal surface of described cylindrical thin wall parts is circular, ellipse, rectangle or polygon.

4. elastic buffer according to claim 1 and plastic buckling tandem energy-absorbing assembly, it is characterized in that, described cylindrical thin wall parts are metal material.