CN201566443U - Active mass shock absorber - Google Patents

The utility model relaters to an active mass shock absorber for a vehicle body or a subsidiary vehicle frame on a vibration transmitting route of a power assembly suspension structure. The active mass shock absorber comprises a base, a mass body, a core body and a spring, wherein the base is arranged on the vehicle body or the vehicle frame; one end of the spring is fixed on the base, and the other end of the spring is fixed on the mass body, so that the mass body keeps the static balance through the supporting force of the spring; and the core body is winded with a coil, and the core body is fixed on one of the base or the mass body. When the coil on the core body is communicated with the alternating current, an acting force can be generated between the core body and the mass body or between the core body and the base, so that mass body can generate the active vibration relative to the vehicle body or the subsidiary vehicle frame. The shock absorber can effectively reduce the vibration noise of small vehicles and obviously improve the comfortableness of passengers.

Active mass bumper

[technical field]

The utility model relates to a kind of active mass bumper or vibration damper, in particular, relates to a kind of vehicle body on the dynamic assembly suspension structural vibration bang path or active mass bumper on the subframe of being used for.

[background technology]

The dynamic assembly of being made up of driving engine and change speed gear box is the topmost vibration noise of automobile source, and it has very great influence for ride of vehicle.Improving dynamic assembly is used to reduce the noise that the car internal vibration produced and can adopts two kinds of means usually.A kind of is the vibration noise radiation level that directly reduces the vibration noise source; Another kind then is to adopt an effective measure to reduce vibration noise on pipeline.For first kind of means,, can make research and development and production mechanism spend a large amount of financial resources and material resources usually owing to be subjected to the influence of vehicle complete vehicle performance and engine performance.And along with deepening continuously of research and development, the usefulness of prior art is more and more near its limit, and the validity of the vibrating noise of this reduction soruce of vibration is also relatively more and more lower.And for second kind of means, generally, the mass bumper that adopts in the automobile is based on the resonance principle of quality-spring system, that is to say, this mass bumper is brought into play effectiveness in vibration suppression near the resonance frequency point of shock absorber, but along with the variation of running velocity if a plurality of Frequency points that need vibration damping are arranged by the vibration damping object, or need be in certain frequency limit vibration damping, then this mass bumper obviously can not meet the demands preferably.And under a lot of situations, research and development institution will consider changes original dynamic assembly elastic mounting or isolation products, and this certainly will also can produce certain influence to the automobile whole development, and has correspondingly increased the expense of research and development.Therefore, for automobile industry, these two kinds of means all have been subjected to more and more multifactorial restriction, as vehicle complete vehicle and engine performance, vehicle structure layout, running cost etc.

Therefore, according to the actual vibration situation, provide a kind of for a plurality of frequencies, perhaps for can the take the initiative shock absorber of damping of vibrations of formula of the vibration of certain bandwidth, and not needing original dynamic assembly elastic mounting or isolation products are made any change, really is that the technology of this area is required.

[utility model content]

The purpose of this utility model is intended to, a kind of active bumper that can overcome above-mentioned defective is provided, this active bumper is to eliminate on pipeline or reduce vibrating noise, and do not relate to for original dynamic assembly elastic mounting or isolation products and making any change, and only be mounted near them the vehicle body or subframe.

Another purpose of the present utility model is, pass to the dynamic force of vehicle body or subframe at elastic mounting or isolation products, can inspire that frequency is identical, amplitude near but the opposite dynamic force of phase place, in order to the structure-borne sound that reduces effectively to transmit on the respective paths, reach the purpose of improving car internal vibration noise.

The purpose of this utility model realizes by the following technical solutions:

The utility model provides a kind of mass dampers, and it includes: mass; Pedestal, described pedestal are installed on vehicle body or the subframe with fixing described mass dampers; Spring, an end of described spring is fixed on the pedestal, and the other end is fixed on the mass, makes described mass keep static balancing by the bearing force of spring; Core body, be wound with the coil that to connect exchange current on it, described core body is fixed on one of them of described pedestal or mass, wherein, when the coil on the core body is connected exchange current, can produce application force between described core body and the described mass or between described core body and described pedestal, thereby make described mass can produce active vibration with respect to vehicle body or subframe.

A kind of mass dampers that the utility model provides, the frequency of wherein said active vibration is identical with oscillation frequency on vehicle body or the subframe, plays the effect of offsetting itself vibration on vehicle body or the subframe.

A kind of mass dampers that the utility model provides, wherein said mass dampers further comprise the magnet that the magnetic that is separately positioned on the core body both sides is inhaled mutually.

A kind of mass dampers that the utility model provides, the described exchange current that wherein is applied on the coil changes according to the vibration on detected vehicle body or the subframe.

A kind of mass dampers that the utility model provides, wherein said mass dampers is installed on the vehicle body as discrete-component.

A kind of mass dampers that the utility model provides, the amplitude of wherein said mass and the pedestal quality with the elasticity modulus of exchange current size, spring and damping coefficient, mass at least are relevant.

A kind of mass dampers that the utility model provides, the active force that the vibration of wherein said mass and pedestal the produces vibration acceleration with the quality of mass, mass at least are relevant.

A kind of mass dampers that the utility model provides, wherein said core body are iron core or aluminium core.

Mass dampers in the technique scheme can be eliminated the defective of existing bumper, and need not make any change to dynamic assembly elastic mounting or isolation products, only it need be placed on vehicle body or the subframe.

[description of drawings]

Now, the technical solution of the utility model is carried out in detail or preferred the description in conjunction with following accompanying drawing, wherein,

Accompanying drawing 1 is the active mass dampers among the embodiment of the present utility model;

Accompanying drawing 2 is the active mass dampers among another embodiment of the present utility model.

[specific embodiment]

Understand easily, according to the technical solution of the utility model, do not changing under the connotation of the present utility model, one of ordinary skill in the art can propose a plurality of frame mode of the present utility model.Therefore the following specific embodiment and accompanying drawing only are to the specifying of the technical solution of the utility model, and should not be considered as of the present utility model all or be considered as qualification or restriction to technical solutions of the utility model.

Wherein here, A is an electromagnetic force; I (f) is the exchange current of coil along with frequency f; X ' is the vibration displacement of pedestal along with frequency f (f); X (f) is the vibration displacement of mass along with frequency f; M is the quality of mass; C is the damping coefficient of spring; K is the elasticity modulus of spring.

Correspondingly, the dynamic force R (f) that is applied on vehicle body or the subframe of mass dampers of the present utility model can represent by following formula:

In above-mentioned formula (1) and formula (2), it is identical with the frequency of Vehicular vibration that frequency f is preferably.Thereby can be under same frequency, apply phase place is opposite, amplitude is close vibration on the vehicle body or subframe of vehicle, thereby more effectively weaken the vibration noise that is passed to car internal object position, obviously improve the traveling comfort of taking.

Understand easily,, still have other similar embodiments based on the foregoing description of the present utility model.For example, can increase core body, number of springs according to actual conditions.For example, the active bumper in the utility model is inverted installation, at this moment, the mass of describing in the foregoing description is equivalent to the pedestal of this mounting means down active mode bumper, and pedestal is equivalent to produce the mass of active bumper.Obviously, this mounting means can solve technical problem to be solved in the utility model equally.Therefore, for one of ordinary skill in the art, this similar conspicuous modification should be within protection domain of the present utility model.

Active bumper of the present utility model, do not need original dynamic assembly elastic mounting or isolation products are made any change, and just it is installed on vehicle body or the subframe, by vibration according to detection, the bang path that definite vibration is the most outstanding, and correspondingly by control system, apply on this active bumper that frequency is identical, amplitude near but the opposite active vibration of phase place.This bumper can reduce the vibration of vehicle noise effectively, and has used this mass dampers, obviously improves the traveling comfort of taking.