CN204692427U - A kind of elastoplasticity energy-absorbing buffering assembly - Google Patents

Abstract

The utility model relates to a kind of elastoplasticity energy-absorbing buffering 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 Compress Spring is force side, also comprises 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, the other end of described cylindrical thin wall parts is sleeved on described boss.The fixed installation end of described cylindrical thin wall parts is provided with mounting plate, is fixedly connected with between described Compress Spring with cylindrical thin wall parts by connecting plate, and the force side of described Compress Spring is provided with support 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 elastoplasticity energy-absorbing buffering assembly

Technical field

The utility model relates to buffering energy-absorbing technical field, particularly relates to a kind of elastoplasticity energy-absorbing buffering assembly.

Background technique

Along with the development of the traffic tool such as automobile, bullet train and improving constantly of motion speed, its crashworthiness more and more receives the concern of people, because collision accident can cause great personal injury and property loss, the problem must considered when collision problem has become the structural design such as automobile, bullet train.Another major issue in automobile, bullet train is exactly buffer problem, but when object bears slight impact or jolts, Buffer Unit effectively can alleviate vibration, 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 oil hydraulic 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 damping devices are also difficult to be competent at, and simple energy absorbing component can not embody buffer function 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 damping device, 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.

Model utility content

The utility model, for above-mentioned the deficiencies in the prior art, provides a kind of elastoplasticity energy-absorbing buffering assembly with buffering and energy-absorbing function.

The technological scheme that the utility model solves the problems of the technologies described above is as follows: a kind of elastoplasticity energy-absorbing buffering 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 Compress Spring is force side, 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, the other end of described cylindrical thin wall parts is sleeved on described boss.

Working principle of the present utility model is, the mode that cylindrical thin wall parts can be overturn by thin-walled under axial pressure effect, absorbs a large amount of energy with its plastic deformation.Its umklapp process compares cylindrical thin wall parts and produces bending deformation by axial compression, and having very long stroke and the tilting force of stable state, is ideal energy-absorbing member.Therefore the upset of cylindrical thin wall parts can be used as energy-absorbing member, as the bumper assembly etc. of Helicopter Seat support and automobile.Under the prerequisite that toughness of material is good, only have thickness dimensions just may overturn than cylinder within the specific limits.Require that the hardening Plastic effect of material is not obvious in addition, otherwise easily flexing occurs after initial upset.

The beneficial effects of the utility model are: the buffer capacity of elastic member 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 when burst accident occurs, 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 thin-walled upset absorb and 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 Combination Design is conducive to meeting the requirement of vehicle light-weight design, containing a large amount of thin walled structuress in vehicle body, the utility model is applied in the security protection performance that these thin walled structuress 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 mounting plate, is fixedly connected with between described Compress Spring with cylindrical thin wall parts by connecting plate, and the force side of described Compress Spring is provided with support plate.

The beneficial effect of above-mentioned further scheme is adopted to be, the setting of mounting plate, connecting plate and support 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 uniformly, better play the effect of assembly energy-absorbing buffering.

Further, the transverse section of described cylindrical thin wall parts is circular, ellipse, rectangle or polygonal.

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 mounting point and function.

The elastic buffer that described elastoplasticity energy-absorbing buffering assembly can carry can be:

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

Wherein, k is Compress Spring elasticity coefficient, and L1 is the free length of Compress Spring, L ₂length after Compress Spring compacting;

The plasticity energy absorption ability of assembly is:

$E_p=2\mathrm{\πYtL}\sqrt{\mathrm{Dt}/2}$

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 for cylindrical thin wall parts.

Accompanying drawing explanation

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

Fig. 2 is working principle schematic diagram (original state) of the present utility model;

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

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

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

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

In Fig. 1 ~ Fig. 6,1, cylindrical thin wall parts; 2, Compress Spring; 3, overturning seat; 3-1, boss; 4, connecting plate; 5, support plate; R, cylindrical thin wall part turnover radius.

Embodiment

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 elastoplasticity energy-absorbing buffering assembly, comprise cylindrical thin wall parts 1 and Compress Spring 2, one end of described Compress Spring 2 is fixedly connected with one end of described cylindrical thin wall parts 1, the other end of described Compress Spring 2 is force side, also comprises 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, the other end of described cylindrical thin wall parts 1 is sleeved on described boss 3-1.

Described Compress Spring 2 is fixedly connected with by connecting plate 4 with between cylindrical thin wall parts 1, and the force side of described Compress Spring 3 is provided with support plate 5.

The transverse section of described cylindrical thin wall parts 1 is circular, ellipse, rectangle or polygonal.

The thin-walled end of described cylindrical thin wall parts 1 is circular arc.

Working principle of the present utility model is as follows:

By the cylindrical thin wall parts of certain size are connected mutually with Compress Spring, the tandem elastic buffer controlled by critical protection can be formed and add plasticity upset energy-absorbing combination protective equipment.

Cylindrical thin wall parts 1 are when being subject to enough pressure, and can absorb considerable energy by plasticity upset, through reasonably designing, cylindrical thin wall parts have controllable failure mode, overturn load more stably, are a kind of useful buffer structures.Compress Spring is typical Buffer Unit, has complete recoverable deformability.

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

F _e＝kx

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

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

$F_P{=F}_L=2\mathrm{\πYt}\sqrt{\mathrm{Dt}/2}$

Wherein F _pthe average tilting forces of cylindrical thin wall parts, F _lfor assembly elastoplasticity transforms critical force, 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 depicted in figs. 1 and 2, in figure, L1 is the free length of Compress Spring, and L is the length of cylindrical thin wall parts, and r is cylindrical thin wall part turnover radius, and X represents the offset axis of substantially horizontal.

The critical conversion of elastoplasticity of this energy-absorbing assembly is controlled by tilting force, chooses F _lfor critical conversion power.As pressure F _t

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 original state principle schematic of the present utility model.In figure, L is the length of cylindrical thin wall parts, and L1 is the free length of Compress Spring.X represents the offset axis of substantially horizontal.

As shown in Figure 3, for assembly of the present utility model is in the working principle 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 tilting force of meeting stable output.

$F_{\mathrm{av}}=2\mathrm{\πYt}\sqrt{\mathrm{Dt}/2}$

Assembly continues upset in plasticity compressing section, until plasticity cylindrical drum overturns complete completely, assembly now loses energy absorption ability.

Tandem elastic buffer adds the protection course of plasticity upset energy-absorbing combination guard assembly as shown in Figure 5, and theoretically, it is L+L that assembly possesses total energy-absorbing displacement ₁-L ₂, wherein elastic buffer distance is L ₁-L ₂, plasticity energy-absorbing distance is L.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

$E_p=2\mathrm{\πYtL}\sqrt{\mathrm{Dt}/2}$

Energy-absorbing assembly continues conquassation at plastic compression stages, until the compacting of cylindrical thin wall part turnover, 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 working principle schematic diagram of compaction state.Wherein L2 represent Compress Spring be compressed to the limit time non-flip portion length; L3 represents that cylindrical thin wall parts are by the length of compressive strain to the limit.

As shown in Figure 6, be displacement diagram schematic diagram of the present utility model, wherein, X represents the compression distance of substantially horizontal, the power size that F proxy component bears.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:

$E_p=2\mathrm{\πYtL}\sqrt{\mathrm{Dt}/2}$

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

In addition, cylindrical thin wall part turnover can be divided into band die flip and freely overturn.Wherein freely overturn and need suitable mounting fixture, band die flip is then be pressed on turnover mould by cylindrical thin wall parts.

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 elastoplasticity energy-absorbing buffering 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 Compress Spring is force side, also comprises 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, the other end of described cylindrical thin wall parts is sleeved on described boss.

2. elastoplasticity energy-absorbing buffering assembly according to claim 1, is characterized in that, be fixedly connected with by connecting plate between described Compress Spring with cylindrical thin wall parts, the force side of described Compress Spring is provided with support plate.

3. elastoplasticity energy-absorbing buffering assembly according to claim 1 and 2, is characterized in that, the transverse section of described cylindrical thin wall parts is circular, ellipse, rectangle or polygonal.

4. elastoplasticity energy-absorbing buffering assembly according to claim 1 and 2, is characterized in that, the thin-walled end of described cylindrical thin wall parts is circular arc.