CN103899704A - Damping-adjustable vibration isolation platform with quasi-zero stiffness - Google Patents
Damping-adjustable vibration isolation platform with quasi-zero stiffness Download PDFInfo
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- CN103899704A CN103899704A CN201410032741.8A CN201410032741A CN103899704A CN 103899704 A CN103899704 A CN 103899704A CN 201410032741 A CN201410032741 A CN 201410032741A CN 103899704 A CN103899704 A CN 103899704A
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Abstract
The invention discloses a damping-adjustable vibration isolation platform with quasi-zero stiffness. The damping-adjustable vibration isolation platform comprises a bearing assembly, a fixed platform frame and damping assemblies. The bearing assembly is used for bearing vibration isolation objects. The fixed platform frame is provided with an open end and a cavity which is communicated with the open end, and the bearing assembly and the damping assemblies are contained in the cavity. The damping assemblies comprise the damping-adjustable upper damping assembly and the damping-adjustable lower damping assembly which are arranged in the cavity in the longitudinal direction, and the bearing assembly is connected with the fixed platform frame through the upper damping assembly and the lower damping assembly. The vibration isolation platform solves the difficulty existing when a traditional linear vibration isolation system isolates low frequency or ultra-low frequency vibration, and also overcomes the defects that an active or semi-active control vibration isolation device is complex in structure, high in manufacturing cost, high in energy consumption and the like; the vibration isolation platform is simple in structure, applicable to wide-frequency-domain vibration isolation, capable of being widely applied to precise equipment with strict vibration isolation requirements and has good engineering adaptability. Besides, damping is simple and convenient to adjust.
Description
Technical field
The present invention relates to be applicable to a kind of damping adjustable shock isolation platform with accurate zero stiffness of low frequency or superlow frequency vibration isolating; This vibration-isolating platform can be widely used in the buffering vibration isolation of automobile, boats and ships, aircraft, aerospace vehicle, precision type instrument, precision machine tool processing and other fields.
Background technique
Traditional passive vibration isolation system is greater than the natural frequency of vibrating isolation system own in extraneous energizing frequency
times time, just can play vibration isolation effect.This vibrating isolation system can be isolated preferably energizing frequency and is greater than
the medium, high frequency vibration of times system frequency, but isolation energizing frequency is less than
the low-frequency vibration of times system frequency especially ability of superlow frequency vibrating is poor.In order to improve the ability of passive vibration isolation isolation of system low frequency and superlow frequency vibrating, should reduce the natural frequency of vibrating isolation system, conventionally there are two kinds of ways: the one, reduce the rigidity of vibrating isolation system; The 2nd, add weight mass.But for vertical vibration isolation system, reduce rigidity and can make the static displacement of vibrating isolation system increase and stability decreases; Obviously be last selection and add weight mass, only, the in the situation that of last resort, application is limited.In order to overcome the contradiction between system stiffness and static displacement, vibrating isolation system should have higher static stiffness and lower dynamic rate simultaneously, and higher static stiffness ensures that system bearing ability is larger, and static displacement is less; Lower dynamic rate ensures that system frequency is lower, and low frequency vibration isolation effect is better.Though existing active active vibration isolation and semi-active vibration-isolating can effectively be isolated low-frequency vibration, system architecture complexity, manufacture cost is high, expends the energy, and can cause electromagnetic pollution.
Summary of the invention
The invention provides a kind of have both higher static stiffness and lower dynamic rate and damping adjustable, the vibration-isolating platform with accurate zero stiffness characteristic.
To achieve these goals, the technological scheme that the present invention takes is: a kind of damping adjustable shock isolation platform with accurate zero stiffness, comprise bearing assembly, fixed platform framework and damping assembly, wherein,
Bearing assembly, for carrying vibration isolation object;
Fixed platform framework, the cavity that is provided with an opening end and is communicated with opening end, accommodates bearing assembly and damping assembly in cavity;
Damping assembly, is included in cavity and longitudinally arranges and adjustable upper damping assembly and the lower damping assembly of damping, and bearing assembly is connected with fixed platform framework with lower damping assembly by upper damping assembly.
Described upper damping assembly is circumferentially with three on the edge, outside of described bearing assembly.
Described lower damping assembly edge below described bearing assembly is circumferentially with three.
Described upper damping assembly and lower damping assembly include vibration damper, be set in the spring on vibration damper and be located at the mounting structure at vibration damper two ends, vibration damper is adjustable-damping shock absorber, vibration damper is connected with described bearing assembly and described fixed platform framework respectively by the mounting structure at two ends, and vibration damper is provided with the upper spring seat and the lower spring cup that are connected with the top and bottom of spring respectively.
Described lower spring cup with described vibration damper for being threaded.
Described vibration damper comprises oil storage cylinder, clutch release slave cylinder, piston assembly and the damper regulation mechanism for regulating piston assembly damping force being connected with piston assembly, piston assembly comprises a hollow piston rod and is positioned at clutch release slave cylinder and is connected to the piston valve assembly of hollow piston rod lower end, and described upper spring seat is connected with the upper end of hollow piston rod.
Described piston valve assembly comprises piston only and is arranged in the rotating rotary spool of piston only, piston only center is provided with the valve pocket that holds rotary spool, rotary spool is provided with the center hole extending vertically and the spool damp channel that radially runs through rotary spool and be communicated with center hole, spool damp channel is axially arranged with different several of pore size and is circumferentially uniformly distributed along rotary spool along rotary spool, in piston only, be provided with two main damp channels that lay respectively at rotary spool both sides and several radial guiding through holes that are communicated with each spool damp channel and main damp channel, radial guiding through hole radially extends and the axis of each radial guiding through hole parallels along piston only.
Described damper regulation mechanism comprises rotating controlling rod in the described hollow piston rod of insertion, for driving the damping adjusting knob of controlling rod rotation and being located at the lid on described upper spring seat, damping adjusting knob end is inserted in lid and is connected with the upper end of controlling rod by bevel gear mechanism, the lower end of controlling rod is inserted in described piston only and is connected with described rotary spool, in controlling rod, be provided with the axial via being communicated with the center hole of described rotary spool, controlling rod is provided with several radial holes that radially run through and be communicated with axial via, the number of radial hole equates and is circumferentially uniformly distributed along controlling rod with the number of described spool damp channel, hollow piston rod is provided with the through hole that radially runs through and be communicated with the radial hole on upper chamber and the controlling rod of described clutch release slave cylinder.
Described bearing assembly comprises the bearing table and the halfpace that is positioned at bearing table below for carrying vibration isolation object, and bearing table is connected with halfpace by pillar, and halfpace is connected with described damping assembly.
The cavity inner bottom part of described fixed platform framework is provided with the limiting stopper that is positioned at described halfpace below.
The invention has the advantages that:
1, difficult problem when this vibration-isolating platform has not only solved conventional linear vibrating isolation system isolation low frequency or superlow frequency vibrating, has also avoided adopting initiatively and half ACTIVE CONTROL vibration isolator structure complexity, manufacture cost are high and the shortcoming such as power consumption;
2, this vibration-isolating platform is in certain deformation band, in parallel with three of the lower ends spring of positive rigidity using three springs of upper end as negative stiffness element, can realize near the non-linear rigidity of this vibration-isolating platform accurate zero stiffness and the equilibrium position of its equilibrium position;
3, this vibration-isolating platform has simple in structure, damping and regulates easyly, is applicable to wide frequency domain vibration isolation, can be widely used in the precision equipment strict to vibration isolation requirement, has good engineering adaptability;
4, this vibration-isolating platform, in having higher support stiffness, also has very low motion rigidity, and static deformation amount is little, and dynamically natural frequency is low, and vibration isolating effect is good;
5, logical overdamped free adjusting, this platform can solve the intrinsic contradictions of the traditional vibrating isolation system of restriction: the contradiction of low-frequency vibration transmissibility and dither decrement;
6, by the adjusting of spring seat height, can change height and the equipoise of whole platform, can adapt to the vibration isolation object of Different Weight.
Brief description of the drawings
This specification comprises the following drawings, shown in content respectively:
Fig. 1 is the structural drawing of vibration-isolating platform of the present invention;
Fig. 2 be bearing assembly structural drawing;
Fig. 3 is the structural drawing of damping assembly;
Fig. 4 is the sectional view of vibration damper;
Fig. 5 is the 3-D view of A part in Fig. 4;
Fig. 6 is damping adjusting knob structural drawing;
Fig. 7 jumps work view on vibration-isolating platform;
Fig. 8 jumps work view under vibration-isolating platform.
In figure, be labeled as:
1, pillar; 2, spherical hinge; 3, upper damping assembly; 4, lower damping assembly; 5, rotary hinge; 6, rotary hinge seat; 7, limiting stopper; 8, fixed platform framework; 9, halfpace; 10, bearing table; 11, connecting screwed tube; 12, upper spring seat; 13, spring; 14, vibration damper; 15, lower spring cup; 16, vibration damper base; 17, controlling rod; 18, hollow piston rod; 19, axial via; 20, rotary spool; 21, piston only; 22, clutch release slave cylinder; 23, radial guiding through hole; 24, radial hole; 25, positioning screwn; 26, locking ball; 27, damping adjusting knob; 28, drive bevel gear pair; 29, lid; 30, main damp channel; 31, stretching valve; 32, flowing valve; 33, recuperation valve; 34, compression valve; 35, oil storage cylinder; 36, through hole; 37, spool damp channel.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail, and object is to help those skilled in the art to have more complete, accurate and deep understanding to design of the present invention, technological scheme, and contributes to its enforcement.
As shown in Figures 1 to 8, a kind of damping adjustable shock isolation platform with accurate zero stiffness of the present invention, comprises bearing assembly, fixed platform framework 8 and damping assembly.Wherein, bearing assembly is that the cavity that fixed platform framework 8 is provided with an opening end and is communicated with opening end, accommodates bearing assembly and damping assembly in cavity for carrying vibration isolation object; Damping assembly is included in the cavity of fixed platform framework 8 and longitudinally arranges and adjustable upper damping assembly 3 and the lower damping assembly 4 of damping, bearing assembly is connected with fixed platform framework 8 with lower damping assembly 4 by upper damping assembly 3, upper damping assembly 3 is connected by ball pivot with halfpace 9 with lower damping assembly 4, is connected for turning joint with fixed platform framework 8.
Specifically, the entirety of fixed platform framework 8 is cylindrical body, and upward, center is cavity to opening end, and fixed platform framework 8 is as the hard-wired basis of whole vibration-isolating platform.Bearing assembly comprises the bearing table 10 and the halfpace 9 that is positioned at bearing table 10 belows for carrying vibration isolation object, and bearing table 10 is fixedly connected with halfpace 9 by three pillars 1, thereby forms an entirety.Halfpace 9 is connected with damping assembly, as shown in the figure, upper damping assembly 3 is circumferentially with three on line edge centered by the axis of fixed platform framework 8, outside of halfpace 9, lower damping assembly 4 below halfpace 9 centered by the axis of fixed platform framework 8 line along being circumferentially with three, upper damping assembly 3 and lower damping assembly 4 and for being uniformly distributed.Halfpace 9 entirety are discoid, and coaxial with fixed platform framework 8 under original state, halfpace 9 and bearing table 10 can move upward and stretch out from the opening end of fixed platform framework 8.
The cavity inner bottom part of fixed platform framework 8 is provided with the limiting stopper 7 that is positioned at halfpace 9 belows, and this limiting stopper 7 adopts rubber to make, and in order to limit bearing table excessive displacement of 10 moments, as shown in Figure 8, can play overload protective function to vibration-isolating platform.
The structure of upper damping assembly 3 and lower damping assembly 4 is basic identical, include a vibration damper, be set in the spring 13 on vibration damper and be located at the mounting structure at vibration damper two ends, upper damping assembly 3 sizes are less than the size of lower damping assembly 4, and the damping size of spring rate between the two and vibration damper can be not identical.Vibration damper is adjustable-damping shock absorber, makes the damping of damping assembly 3 and lower damping assembly 4 adjustable.Vibration damper is to be connected with halfpace 9 and fixed platform framework 8 respectively by the mounting structure at two ends, the mounting structure of upper end is to be arranged on respectively the periphery of halfpace 9 and three spherical hinges 2 that edge, bottom surface is circumferentially evenly arranged, the periphery of halfpace 9 is provided with three grooves that hold spherical hinge 2, the mounting structure of lower end comprises and being arranged on respectively on the cavity inner bottom part of fixed platform framework 8 and the internal face of opening end and along three rotary hinge seats 6 that are circumferentially evenly arranged and the rotary hinge 5 that is arranged on each vibration damper underpart, rotary hinge 5 is rotationally connected by a rotating shaft and rotary hinge seat 6.
On vibration damper, be also provided with the upper spring seat 12 and the lower spring cup that are connected with the top and bottom of spring 13 respectively, upper spring seat 12 is to be fixedly mounted on vibration damper, lower spring cup with vibration damper for being threaded, position-adjustable, thereby can make lower spring cup move along the axis of vibration damper, to change the initial compression amount of spring 13.Three springs 13 of three upper damping assemblies 3 coordinate with three springs 13 of three lower damping assemblies 4, can make whole vibration-isolating platform have accurate zero stiffness characteristic, can improve the anti-vibration performance of platform, expand the vibration isolation frequency bandwidth of platform.Like this, can make platform reach best vibration isolating effect.
This vibration-isolating platform can be according to the weight of load, regulate the position of the lower spring cup on each vibration damper in each lower damping assembly 4, to change the initial compression amount of the spring 13 in lower damping assembly 4, thereby can adjust the height of halfpace 9, the system dynamic equilibrium position of making has accurate zero stiffness characteristic, now the spring 13 of three upper damping assemblies 3 is in compressive state, and the spring 13 of three lower damping assemblies 4 is also in compressive state; Can, by regulating the damping of vibration damper, solve the contradiction of low-frequency vibration transmissibility and dither decrement simultaneously, make vibration-isolating platform in optimum Working.
Whole vibration-isolating platform is in the time of work, first, according to the weight of vibration isolation object, the height of the lower spring cup on three vibration dampers of adjusting halfpace 9 belows, makes halfpace 9 concordant with the upper-end surface of fixed platform framework 8, if still do not reach requirement, spring 13 can be replaced by the spring of larger rigidity; According to extraneous vibration source excitation situation, regulate the damping of vibration damper again; If excited frequency is very low, the height of the lower spring cup on the vibration damper of adjustable upper damping assembly 3, now halfpace 9 is concordant with the upper-end surface of fixed platform framework 8, so that the power applying is is circumferential, so that whole platform rigidity trends towards zero stiffness, i.e. accurate zero stiffness.
The vibration-isolating platform of accurate zero stiffness, can improve the width of vibration isolation frequency band significantly, meets engineering practicability on a large scale, can be applicable to the vibration isolation of precision or ultraprecise instrument.If vibration isolation is less demanding, can not need halfpace 9 to adjust to the position concordant with the upper-end surface of fixed platform framework 8, but higher than the upper-end surface of fixed platform framework 8, as shown in Figure 7, at this moment vibration-isolating platform is a common linear vibration-isolating platform, but damping is still adjustable, still can make platform reach good vibration isolating effect, be better than existing linear passive vibration isolation platform.
This vibration-isolating platform adopt vibration damper be damp adjustable, and be 6 grades adjustable.As shown in Figure 3, it comprises oil storage cylinder 35, clutch release slave cylinder 22, piston assembly and the damper regulation mechanism for regulating piston assembly damping force being connected with piston assembly.Piston assembly comprises a hollow piston rod 18 and is positioned at clutch release slave cylinder 22 and is connected to the piston valve assembly of hollow piston rod 18 lower ends, and upper spring seat 12 is fixedly connected with the upper end of hollow piston rod 18.
The vibration damper of damping assembly is mainly by the internal structure of piston valve assembly is improved, to realize the adjusting of damping.Particularly, as shown in the figure, piston valve assembly comprises piston only 21 and is arranged in the rotating rotary spool 20 of piston only 21, the center of piston only 21 is provided with the valve pocket that holds rotary spool 20, valve pocket is circular cavity body, rotary spool 20 entirety are cylindrical, and rotary spool 20 is provided with the center hole extending vertically and the spool damp channel 37 that radially runs through rotary spool 20 and be communicated with center hole, and fluid flows in rotary spool 20 by center hole and spool damp channel 37.Spool damp channel 37 is axially provided with six altogether along rotary spool 20, and these six spool damp channels 37 are circumferentially uniformly distributed along rotary spool 20, and the angle between the axis of adjacent two spool damp channels 37 is 30 degree.The effect regulating in order to possess damping, the pore size of six spool damp channels 37 is different, along rotary spool 20 axially, six spool damp channels 37 set gradually according to aperture is descending, near the aperture maximum of the spool damp channel 37 of hollow piston rod 18, away from the aperture minimum of the spool damp channel 37 of hollow piston rod 18.The inside of piston only 21 is also provided with two main damp channels 30 that lay respectively at rotary spool 20 both sides and several radial guiding through holes 23 that are communicated with each spool damp channel 37 and main damp channel 30, and main damp channel 30 is to start from the lower end surface of piston only 21 upwards to extend towards piston only 21 inside along the direction parallel with piston only 21 axis.Radial guiding through hole 23 is respectively equipped with six in both sides, radial guiding through hole 23 is to parallel along piston only 21 axis radially that extend and each radial guiding through hole 23, six radial guiding through holes 23 axially set gradually according to aperture is descending along piston only 21, and the aperture of the radial guiding through hole 23 of each position is identical with the pore size of spool damp channel 37 with matching, because spool damp channel 37 is staggeredly arranged, therefore, only have a spool damp channel 37 to be communicated with a pair of radial guiding through hole 23 at every turn, form the passage of fluid, the epicoele of conducting clutch release slave cylinder 22 and cavity of resorption.On rotary spool 20, other hole is sealed by piston only 21 inwalls, not conducting.This vibration damper turns an angle by rotary spool 20, the spool damp channel 37 of different pore size and the radial guiding through hole 23 of respective aperture are communicated with, due to the variation in aperture, can change the size of fluid passage, control the size of the fluid flow between clutch release slave cylinder 22 cavity of resorptions and epicoele, and then reach the object that changes resistance of shock absorber.
As shown in the figure, the damper regulation mechanism of vibration damper comprise insert rotating controlling rod 17 in hollow piston rod 18, for driving the damping adjusting knob 27 that controlling rod 17 rotates and being located at the lid 29 on upper spring seat 12.Lid 29 is fixedly mounted on the end face of upper spring seat 12, and lid 29 inside are provided with a cavity.Damping adjusting knob 27 is to be made up of discoid knob body and the knob shaft that is located at knob body, the surface of knob body indicates the numeral that represents gear, insert in the cavity of lid 29 one end of knob shaft, and the sidewall of lid 29 is provided with the jack that allows running shaft pass.On the periphery of running shaft, be along the circumferential direction evenly provided with six gear fixed grooves, a groove represents a gear, in this gear fixed groove, be provided with locking ball 26, on the internal face of jack, be also provided with the locating slot that holds locking ball 26, in this locating slot, be installed with a positioning screwn 25, between positioning screwn 25 and locking ball 26, accompany the retaining spring that is compressive state, retaining spring applies active force to locking ball 26, locking ball 26 is stuck in gear fixed groove all the time, damping adjusting knob 27 is remained on set position.The end of knob shaft is inserted in lid 29 and is connected with the upper end of controlling rod 17 by bevel gear mechanism, the end of knob shaft and controlling rod 17 respectively arranges a bevel gear, two bevel gears are matched and form drive bevel gear pair 28, drive controlling rod 17 to rotate by the rotation of damping adjusting knob 27, controlling rod 17 again driven rotary spool 20 rotates, and finally reaches the object that gear regulates.The lower end of controlling rod 17 is inserted in piston only 21 and is fixedly connected with rotary spool 20, the inside, lower end of controlling rod 17 is provided with the axial via 19 being communicated with the center hole of rotary spool 20, on controlling rod 17, be also provided with several radial holes 24 that radially run through and be communicated with axial via 19, the number of radial hole 24 equates with the number of spool damp channel 37, also be six, the axis of six radial holes 24 be positioned at same plane and along controlling rod 17 circumferentially for being uniformly distributed, in addition, on hollow piston rod 18, being positioned at position above piston valve assembly is provided with and radially runs through and be communicated with the upper chamber of clutch release slave cylinder 22 through hole 36 corresponding with radial hole 24 on controlling rod 17, the axis of through hole 36 is parallel with the axis of radial guiding through hole 23, the number of through hole 36 can be arranged to equate with radial hole 24 numbers, or only arrange one.At each gear, guarantee that the through hole 36 on hollow piston rod 18 sidewalls is communicated with the radial hole 24 on controlling rod 17, through hole 36, radial hole 24, center hole, spool damp channel 37, radial guiding through hole 23 and main damp channel 30 form be communicated with clutch release slave cylinder 22 epicoeles and cavity of resorption allow the mobile passage of fluid.
Fluid in above-mentioned vibration damper can pass through formed passage and flow between the epicoele of clutch release slave cylinder 22 and cavity of resorption, also be provided with single-phase conducting and conducting direction different stretching valve 31 and flowing valve 32 in the bottom of piston only 21, stretching valve 31 and flowing valve 32 lay respectively at the lower ending opening place of a main damp channel 30 simultaneously.The compression valve 34 arranging on the base of the inner bottom part of clutch release slave cylinder 22 and recuperation valve 33 can be communicated with the fluid between cavity of resorption and the oil storage cylinder 35 of clutch release slave cylinder 22.In the time of compression stroke, refer to that piston moves downward, by compression, now the piston only 21 in clutch release slave cylinder 22 moves down vibration damper.The volume reducing of piston lower chambers, oil pressure raise, fluid flow through flowing valve 32, flow to the chamber (epicoele) above piston.Epicoele is by hollow piston rod 18 a part of space that accounted for, thereby the volume that epicoele increases is less than the volume that cavity of resorption reduces, so a part of fluid is just pushed compression valve 34 open, flows back to oil storage cylinder 35.These valves form to oily throttling the damping force that vibration damper moves by compression.Vibration damper, in the time of extension stroke, refers to that piston moves upward, vibration damper Tensile.At this moment the piston only 21 in clutch release slave cylinder 22 moves up.Piston upper chamber oil pressure raises, and flowing valve 32 is closed, and the fluid in epicoele is pushed stretching valve 31 open and flowed into cavity of resorption.Due to the existence of piston rod, the fluid coming from epicoele stream is not enough to be full of the volume that cavity of resorption increases, and instigator's cavity of resorption produces a degree of vacuum, and at this moment the fluid in oil storage cylinder is pushed recuperation valve 33 open and flow to cavity of resorption and supplement.Because the throttling action of these valves plays damping function when the stretching exercise to vibration damper.
The damping of vibration damper is that the resistance of shock absorber of said structure is adjustable for the vibrational energy of consumption systems, the one, for according to the size of system vibration energy, correspondingly change damping, and vibration Shaoxing opera is strong, and damping can tune up, to consume fast vibrational energy; The 2nd, in order to change the damping ratio of whole vibration-isolating platform, to adapt to various engineering application, reach wide band vibration isolation function.
The end face of the lid 29 of above-mentioned vibration damper upper end is also provided with a connecting screwed tube 11, this connecting screwed tube 11 is coaxial with hollow piston rod 18, connecting screwed tube 11 is that internal face is established female straight tube body, the screw flight arranging with spherical hinge 2 on halfpace 9 and lid 29 end faces respectively at two ends is connected, and the vibration damper base 16 arranging on oil storage cylinder 35 lower end end caps is fixedly connected with rotary hinge 5.In addition, the position near lower end on the outer surface of oil storage cylinder 35 is provided with one section of outside thread, for being threaded with lower spring cup.
The vibration damper that this vibration-isolating platform adopts is not limited to said structure, and other vibration damper that possesses damping adjustable function all can be suitable for this vibration-isolating platform.
In foregoing related upper and lower wait the noun of locality be all taking the opening end of locating platform framework vertically orientation upward as benchmark definition, the upper end of vibration damper refers to the one end being connected with halfpace 9, and the lower end of vibration damper refers to the one end being connected with fixed platform framework 8.Should be appreciated that the use of the described noun of locality should not limit the scope of the application's request protection.
Below by reference to the accompanying drawings the present invention is exemplarily described.Obviously, specific implementation of the present invention is not subject to the restrictions described above.As long as having adopted the improvement of the various unsubstantialities that method of the present invention design and technological scheme carry out; Or without improvement, above-mentioned design of the present invention and technological scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (10)
1. a damping adjustable shock isolation platform with accurate zero stiffness, is characterized in that: comprise bearing assembly, fixed platform framework and damping assembly, wherein,
Bearing assembly, for carrying vibration isolation object;
Fixed platform framework, the cavity that is provided with an opening end and is communicated with opening end, accommodates bearing assembly and damping assembly in cavity;
Damping assembly, is included in cavity and longitudinally arranges and adjustable upper damping assembly and the lower damping assembly of damping, and bearing assembly is connected with fixed platform framework with lower damping assembly by upper damping assembly.
2. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 1, is characterized in that: described upper damping assembly is circumferentially with three on the edge, outside of described bearing assembly.
3. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 1, is characterized in that: described lower damping assembly edge below described bearing assembly is circumferentially with three.
4. according to the damping adjustable shock isolation platform with accurate zero stiffness described in claim 1 or 2 or 3, it is characterized in that: described upper damping assembly and lower damping assembly include vibration damper, be set in the spring on vibration damper and be located at the mounting structure at vibration damper two ends, vibration damper is adjustable-damping shock absorber, vibration damper is connected with described bearing assembly and described fixed platform framework respectively by the mounting structure at two ends, and vibration damper is provided with the upper spring seat and the lower spring cup that are connected with the top and bottom of spring respectively.
5. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 4, is characterized in that: described lower spring cup with described vibration damper for being threaded.
6. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 5, it is characterized in that: described vibration damper comprises oil storage cylinder, clutch release slave cylinder, piston assembly and the damper regulation mechanism for regulating piston assembly damping force being connected with piston assembly, piston assembly comprises a hollow piston rod and is positioned at clutch release slave cylinder and is connected to the piston valve assembly of hollow piston rod lower end, and described upper spring seat is connected with the upper end of hollow piston rod.
7. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 6, it is characterized in that: described piston valve assembly comprises piston only and is arranged in the rotating rotary spool of piston only, piston only center is provided with the valve pocket that holds rotary spool, rotary spool is provided with the center hole extending vertically and the spool damp channel that radially runs through rotary spool and be communicated with center hole, spool damp channel is axially arranged with different several of pore size and is circumferentially uniformly distributed along rotary spool along rotary spool, in piston only, be provided with two main damp channels that lay respectively at rotary spool both sides and several radial guiding through holes that are communicated with each spool damp channel and main damp channel, radial guiding through hole radially extends and the axis of each radial guiding through hole parallels along piston only.
8. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 7, it is characterized in that: described damper regulation mechanism comprises rotating controlling rod in the described hollow piston rod of insertion, for driving the damping adjusting knob of controlling rod rotation and being located at the lid on described upper spring seat, damping adjusting knob end is inserted in lid and is connected with the upper end of controlling rod by bevel gear mechanism, the lower end of controlling rod is inserted in described piston only and is connected with described rotary spool, in controlling rod, be provided with the axial via being communicated with the center hole of described rotary spool, controlling rod is provided with several radial holes that radially run through and be communicated with axial via, the number of radial hole equates and is circumferentially uniformly distributed along controlling rod with the number of described spool damp channel, hollow piston rod is provided with the through hole that radially runs through and be communicated with the radial hole on upper chamber and the controlling rod of described clutch release slave cylinder.
9. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 8, it is characterized in that: described bearing assembly comprises the bearing table for carrying vibration isolation object and is positioned at the halfpace of bearing table below, bearing table is connected with halfpace by pillar, and halfpace is connected with described damping assembly.
10. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 9, is characterized in that: the cavity inner bottom part of described fixed platform framework is provided with the limiting stopper that is positioned at described halfpace below.
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| CN201410032741.8A CN103899704B (en) | 2014-01-22 | 2014-01-22 | A kind of damping adjustable shock isolation platform with accurate zero stiffness |
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