CN2215141Y - Microvibration-preventing working table for precision instrument - Google Patents

Abstract

The utility model discloses a microvibration-preventing working table for precision instruments. The present various precision instruments have high microvibration-preventing requirement, which is solved through the building structure or the foundation design, a large amount of capital and materials are consumed, so the microvibration-preventing working table for precision instrument is designed. The balance weight is hung on a floating platform, the system quality is increased to reduce the vibration frequency, and elastic vibration isolating components are used to absorb the energy of the environmental vibration. The utility model can meet the microvibration-preventing requirement of precision instruments, the vibration speed can be controlled under 0.03-0.05 mm/s, the vibration amplitude can be controlled under 0.3-10 mu m, the working precision is improved, the service life is prolonged, the operation and adjustment is convenient, the cost is low, and compared with building or foundation solutions, a large amount of capital can be saved.

Description

Microvibration-preventing working table for precision instrument

The utility model relates to antihunting device, particularly reduces the microvibration-preventing worktable of environment to the exact instrument influence.

Along with popularizing and development of science and technology, the application of high precision instrument more and more widely.Yet high precision instrument is very strict to environment requirement, eliminates vibration and be wherein essential condition.The artificial vibration that machinery, equipment, motor, automobile, people's walking etc. causes; Even the vibration that natural vibration sources such as wind, river, wave, earth pulsation cause is the very small exact instrument that also influences.If can not be vibration control in very little scope, many exact instrument just can't be worked, and the data that record are inaccurate, even can influence the serviceable life of instrument.Traditional vibration damping all is the Vibration Absorption Designing solution by buildings or concrete foundation, consume considerable material and fund.On experience, employing is also arranged at worktable lower margin pad blob of viscose, or on table top the pad offset plate as vibration reducing measure.But effect is very limited, fundamentally can not satisfy the requirement of exact instrument vibration damping.

The purpose of this utility model provides a kind of good effectiveness in vibration suppression that has, and can satisfy the microvibration-preventing worktable of exact instrument job requirement.

The purpose of this utility model realizes by following measure.The characteristics of this anti vibration device are made up of bracing frame, the stand that floats, elastic vibration isolation element, counterweight, table top governor motion, side direction damping element, levelling gear.Float stand by suspension bracket prolong knot counterweight, bracing frame is equipped with the table top governor motion, table top governor motion and elastic vibration isolation element offset, and support float stand and counterweight by elastic vibration isolation element, in the sideshake of float stand and bracing frame the side direction damping element are housed.

Description of drawings.

Fig. 1 is the utility model structural representation.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.See Fig. 1, microvibration-preventing worktable profile is similar to the general work platform, but its mechanical structure is diverse, and this worktable mainly is made up of bracing frame 1 and unsteady stand 2 two large divisions.Bracing frame 1 profile is exactly the profile of worktable, comprises four limits of work top, stressed roof beam structure, the lower margin of decorative panel and kiss the earth.On the inboard main stressed pillar of bracing frame 1, table top governor motion 5 is housed, promptly makes the plane that contacts with elastic vibration isolation element 3 make upper and lower translation by screw mechanism.The last plane of unsteady stand 2 is just concordant with work top four limits of bracing frame, and the side keeps gap about equally.The stand 2 that floats has a suspension bracket 8 that counterweight 4 is hung on the suspension bracket 8, and the downside of the stand 2 that floats has the plane that contacts with elastic vibration isolation element 3.Elastic vibration isolation element 3 transfer function power between unsteady stand 2 and bracing frame 1 like this.The vibration of the external environment that bracing frame 1 is accepted has only the elastic vibration isolation element of making by rubber 3 to pass to float stand 2 and exact instrument thereof, the vibrational energy of environment is absorbed by elastic vibration isolation element 3 like this, the vibration that is reflected on float stand and the instrument is reduced in the scope of permission, reaches the vibration damping purpose.Hold and cut rubber vibration isolation element 3 spiral-locks plane on the lower plane of the stand 2 that floats and table top governor motion 5 respectively.It is very little that the rigidity of cutting rubber is held in the contact of its back, elastic vibration isolation element 3, and system free vibration frequency is directly proportional with the square root of the rigidity of elastic vibration isolation element 3.Therefore effectiveness in vibration suppression is fine.Flexible vibration isolation element 3 series of products also can design as requested on the market.Using counterweight 4 also is the vibration damping important measures.Counterweight 4 hangs on the suspension bracket 8 of the stand 2 that floats.The purpose of hanging counterweight 4 is to reduce the natural frequency of vibration.Because the square root of the natural frequency of vibration of system and mass of system is inversely proportional to.By hanging after counterweight 4 strengthens mass of system, the natural frequency of vibration of system reduces.General instrument is placed on the mass centre that can make system on the table top and improves, and by hanging counterweight 4 the mass of system center is descended.When system's barycenter is transferred to the center of rigidity place of vibration damper, the most stable, the rotary vibration minimum.Owing to want prolong knot counterweight 4, the decrement of elastic vibration isolation element 3 increases, and makes it concordant with periphery in order to adjust the table top that floats, and can adjust by the screw mechanism of table top governor motion 5.Side direction damping element 6 is housed in the sideshake between the table top of bracing frame 1 surrounding platform and unsteady stand 2 also plays the effect of eliminating vibration.The levelling gear 7 of adjusting table-surface level is housed on the lower margin of bracing frame 1, working properly by the level of adjusting table top to guarantee instrument.

The utility model has been realized finishing vibration damping, vibration isolation by worktable itself, even exact instrument can still can not satisfy under the situation of vibration isolation requirement at buildings and basis, can satisfy the operate as normal requirement by the utility model, improve the operating accuracy of instrument, can prolong the serviceable life of instrument.Work top vibration velocity ［ V ］ is controlled at below 0.03～0.05mm/s, and amplitude ［ A ］ is controlled at below 0.3～10 μ m.Can satisfy inertial navigation instrument, gyroscope, servo turntable, high precision balance, laser interferometer, the vibration isolation requirement of instruments such as interference microscope.Simultaneously, vibration isolation efficiency height of the present utility model, volume is little, operation is easy to adjust, worktable can move arbitrarily, also can settle on the building upper strata, and cost is lower, is fit to widespread use.Compare with the method for solving, can save lot of materials and fund from building structure or basis.

Claims (1)

1, exact instrument microvibration-preventing worktable, it is characterized in that forming by bracing frame 1, the stand 2 that floats, elastic vibration isolation element 3, counterweight 4, table top governor motion 5, side direction damping element 6, levelling gear 7, float stand 2 by suspension bracket 8 prolong knot counterweights 4, bracing frame 1 is equipped with table top governor motion 5 and offsets with elastic vibration isolation element 3, support float stand 2 and counterweight 4 by elastic vibration isolation element 3, in the sideshake of float stand 2 and bracing frame 1 side direction damping element 6 is housed.

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