CN204452330U - A kind of elastic buffer and the parallel energy-absorbing of plastic buckling combine protective device - Google Patents

Abstract

The utility model relates to a kind of elastic buffer and the parallel energy-absorbing of plastic buckling combines protective device, 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, the left end of described Compress Spring and the left end of described cylindrical thin wall parts are fixed together, and the right-hand member of described Compress Spring is force side and stretches out outside the right-hand member of described cylindrical thin wall parts.Described Compress Spring is sleeved on inside or the outside 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.

Description

A kind of elastic buffer and the parallel energy-absorbing of plastic buckling combine protective device

Technical field

The utility model relates to buffering energy-absorbing technical field, particularly relates to a kind of elastic buffer and the parallel energy-absorbing of plastic buckling combines protective device.

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 the elastic buffer of buffering and energy-absorbing function and the parallel energy-absorbing of plastic buckling combines protective device.

The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of elastic buffer and the parallel energy-absorbing of plastic buckling combine protective device, 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, the left end of described Compress Spring and the left end of described cylindrical thin wall parts are fixed together, and the right-hand member of described Compress Spring is force side and stretches out outside the right-hand member 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, consume collision energy.By theoretical appraisal, this combination protective device can be combined 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, 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, 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 combinations thereof protective device can carry can be:

$E_e=\frac{1}{2}k{(L_1-L_3)}^2$

Wherein, k is the elastic coefficient, and L1 is the drift of Compress Spring,

The plasticity energy absorption ability of combination protective device is:

$E_p=18.15{\mathrm{Yt}}^2{(D/t)}^{\frac{1}{3}}(L_1-L-L_3)$

Wherein, L ₃for length when described cylindrical thin wall parts are expressed to the most lowest limit, L is the original length of described 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.

Accompanying drawing explanation

Fig. 1 is combination protective device structure 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 (plasticity energy-absorbing and the elasticity combined action 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;

The another kind of embodiment structural representation of Fig. 7 combination protective device of the present utility model;

Fig. 8 ~ Figure 11 is another kind of embodiment principle of work schematic diagram of the present utility model.

In Fig. 1 ~ Figure 11,1, cylindrical thin wall parts; 2, Compress Spring; 3, adapter plate; 4, 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 the parallel energy-absorbing of plastic buckling combine protective device, comprise cylindrical thin wall parts 1 and Compress Spring 2, the center of described Compress Spring and the center of described cylindrical thin wall parts are on the same line, the left end of described Compress Spring and the left end of described cylindrical thin wall parts are fixed together, and the right-hand member of described Compress Spring is force side and stretches out outside the right-hand member of described cylindrical thin wall parts.

Described Compress Spring suit 2 is in the inside of described cylindrical thin wall parts 1.

The left end of described cylindrical thin wall parts is provided with adapter plate 3, 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 4.

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

Described cylindrical thin wall parts are metal 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, through reasonably designing, cylindrical thin wall parts can be made to have controollable failure mode, comparatively pulsation-free crush loads, are a kind of useful buffer structures.Compress Spring 2 is typical Buffer Unit parts, 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:

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

Wherein F _avbe the average crushing 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 Fig. 2 ~ Fig. 5, it is initial condition principle schematic of the present utility model.In figure, L is the length of cylindrical thin wall parts, and L1 is the drift of Compress Spring.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 L1-L, and when displacement is less than L1-L, device shows as elastic buffer performance, and this is that device distortion can recover completely.

When elastic compression displacement reaches L1-L, stay bearing plate and cylindrical thin wall component contact, make cylindrical thin wall parts plastic buckling, thus absorb energy; When displacement is greater than L1-L, device shows as plasticity and elastomeric double action, and therefore crushing force is synthesized by the plasticity power of cylindrical thin wall parts and the elastic force of Compress Spring: namely

$F=F_t+F_{\mathrm{av}}=\mathrm{kx}+18.15{\mathrm{Yt}}^2{(D/t)}^{\frac{1}{3}}$

As described in Figure 5, when displacement continues to increase, device continues conquassation under the above conditions, till cylindrical thin wall parts are compacted.

As shown in Figure 6, be crushing force displacement curve schematic diagram of the present utility model, wherein, X represents the square compression distance of level, the power size that F representative combination protective device bears.Can find out, it is L that energy-absorbing combination protective device possesses total energy-absorbing displacement ₁-L ₃, wherein simple elastic buffer distance is L ₁– L, as shown in A section in figure; The energy-absorbing distance with plasticity is L ₁-L-L ₃.The elastic buffer that combination protective device can carry can be:

$E_e=\frac{1}{2}k{(L_1-L_3)}^2$

Wherein, L ₃for length when described cylindrical thin wall parts are expressed to the most lowest limit.

As shown in B section in figure; The plasticity energy absorption ability of combination protective device is:

$E_p=18.15{\mathrm{Yt}}^2{(D/t)}^{\frac{1}{3}}(L_1-L-L_3)$

Can also find out from above-mentioned analysis: by regulating tubular thin wall component diameter D and thickness t, the average crushing force of tubular thin wall component flexing can be regulated, by regulating the tubular adjustable plastic buckling segment length of thin wall component length L and plasticity energy absorption ability.Adjustable elastic damping characteristics is carried out by adjustable elastic coefficient k, by regulating L at elastic stage ₁adjustable elastic breeze way distance.

As shown in Fig. 7 ~ Figure 11, be another kind of embodiment of the present utility model, described Compress Spring is sleeved on the outside of described cylindrical thin wall parts.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 the parallel energy-absorbing of plastic buckling combine protective device, 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, the left end of described Compress Spring and the left end of described cylindrical thin wall parts are fixed together, and the right-hand member of described Compress Spring is force side and stretches out outside the right-hand member of described cylindrical thin wall parts.

2. elastic buffer according to claim 1 and the parallel energy-absorbing of plastic buckling combine protective device, 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 the parallel energy-absorbing of plastic buckling combine protective device, 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 the parallel energy-absorbing of plastic buckling combine protective device, it is characterized in that, the left end of described cylindrical thin wall parts is provided with adapter plate, 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.

5. the elastic buffer according to any one of claims 1 to 3 and the parallel energy-absorbing of plastic buckling combine protective device, it is characterized in that, the transversal surface of described cylindrical thin wall parts is circular, ellipse, rectangle or polygon.

6. elastic buffer according to claim 4 and the parallel energy-absorbing of plastic buckling combine protective device, it is characterized in that, the elastic buffer that combination protective device can carry can be:

Wherein, k is the elastic coefficient, L ₁for the drift of Compress Spring, L ₃for length when described cylindrical thin wall parts are expressed to the most lowest limit;

The plasticity energy absorption ability of combination protective device is:

Wherein, L ₃for length when described cylindrical thin wall parts are expressed to the most lowest limit, L is the original length of described cylindrical thin wall parts, 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.