CN103899704B - A kind of damping adjustable shock isolation platform with accurate zero stiffness - Google Patents
A kind of damping adjustable shock isolation platform with accurate zero stiffness Download PDFInfo
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- CN103899704B CN103899704B CN201410032741.8A CN201410032741A CN103899704B CN 103899704 B CN103899704 B CN 103899704B CN 201410032741 A CN201410032741 A CN 201410032741A CN 103899704 B CN103899704 B CN 103899704B
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Abstract
The invention discloses a kind of damping adjustable shock isolation platform with accurate zero stiffness, comprise bearing assembly, fixed platform framework and damping assembly, wherein, bearing assembly is for carrying vibration isolation object; Fixed platform framework, the cavity being provided with an opening end and being communicated with opening end, accommodates bearing assembly and damping assembly in cavity; Damping assembly, to be included in cavity and longitudinally to arrange and the adjustable upper damping assembly of damping and lower damping assembly, bearing assembly is connected with fixed platform framework with lower damping assembly by upper damping assembly.Vibration-isolating platform of the present invention not only solves difficult problem when conventional linear vibrating isolation system isolation low frequency or superlow frequency vibrating, also avoid to adopt initiatively and semi-active control vibration isolator structure complexity, manufacture cost are high and the shortcoming such as power consumption; Vibration-isolating platform has that structure is simple, damping regulates easy, is applicable to wide frequency domain vibration isolation, can be widely used in, to the strict precision equipment of vibration isolation requirement, having good engineering adaptability.
Description
Technical field
The present invention relates to a kind of damping adjustable shock isolation platform with accurate zero stiffness being applicable to 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 vibrating isolation system inherently frequency in extraneous energizing frequency
times time, just can play vibration isolation effect.This vibrating isolation system can be isolated energizing frequency preferably and is greater than
the medium, high frequency vibration of times system frequency, but isolation energizing frequency is less than
the ability of the low-frequency vibration of times system frequency especially superlow frequency vibrating is poor.In order to improve the ability of passive vibration isolation isolation of system low frequency and superlow frequency vibrating, the natural frequency of vibrating isolation system should be reduced, usually having two kinds of ways: one is the rigidity reducing vibrating isolation system; Two is add weight mass.But for vertical vibration isolation system, reduce rigidity and the static displacement of vibrating isolation system can be made to increase and stability decline; And to add weight mass be obviously last selection, only when 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 comparatively large, 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 effectively can isolate low-frequency vibration, system architecture is complicated, and 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, comprises bearing assembly, fixed platform framework and damping assembly, wherein,
Bearing assembly, for carrying vibration isolation object;
Fixed platform framework, the cavity being provided with an opening end and being communicated with opening end, accommodates bearing assembly and damping assembly in cavity;
Damping assembly, to be included in cavity and longitudinally to arrange and the adjustable upper damping assembly of damping and lower damping assembly, bearing assembly is connected with fixed platform framework with lower damping assembly by upper damping assembly.
Described upper damping assembly is circumferentially provided with three in the outside of described bearing assembly.
Described lower damping assembly is circumferentially provided with three in the below of described bearing assembly.
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 lower spring cup that are connected with the top and bottom of spring respectively.
Described lower spring cup and described vibration damper are for being threaded.
The damper regulation mechanism for regulating piston assembly damping force that described vibration damper comprises oil storage cylinder, clutch release slave cylinder, piston assembly and is 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 holding rotary spool, rotary spool is provided with the center hole that extends vertically and radially runs through rotary spool and the spool damp channel be communicated with center hole, spool damp channel is axially arranged with different several of pore size along rotary spool and is uniformly distributed along rotary spool circumference, two the main damp channels laying respectively at rotary spool both sides and several radial guiding through holes being communicated with each spool damp channel and main damp channel are provided with in piston only, radial guiding through hole along piston only radial direction extend and the axis of each radial guiding through hole parallel.
Described damper regulation mechanism comprises rotating controlling rod in the described hollow piston rod of insertion, the damping adjusting knob rotated for drived control bar and the lid be located 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, the axial via be communicated with the center hole of described rotary spool is provided with in controlling rod, controlling rod is provided with and radially runs through and several radial holes be communicated with axial via, the number of radial hole is equal with the number of described spool damp channel and be uniformly distributed along controlling rod circumference, hollow piston rod is provided with and radially runs through and be communicated with the through hole of the radial hole on the upper chamber of described clutch release slave cylinder and controlling rod.
The halfpace that described bearing assembly comprises the bearing table for carrying vibration isolation object and is positioned at below bearing table, 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 be positioned at below described halfpace.
The invention has the advantages that:
1, difficult problem when this vibration-isolating platform not only solves conventional linear vibrating isolation system isolation low frequency or superlow frequency vibrating, also avoid and to adopt initiatively and semi-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, and three of upper end springs are in parallel with three, the lower end spring of positive rigidity as negative stiffness element, can realize the non-linear rigidity of this vibration-isolating platform near the accurate zero stiffness and equilibrium position of its equilibrium position;
3, this vibration-isolating platform has that structure is simple, damping regulates easy, is applicable to wide frequency domain vibration isolation, can be widely used in, to the strict precision equipment of vibration isolation requirement, having good engineering adaptability;
4, this vibration-isolating platform is while having higher support stiffness, and also have very low motion rigidity, static deformation amount is little, and dynamic natural frequency is low, and vibration isolating effect is good;
5, logical overdamped free adjusting, this platform can solve the intrinsic contradictions restricting traditional vibrating isolation system: the contradiction of low-frequency vibration transmissibility and dither decrement;
6, by the adjustment of spring seat height, height and the equipoise of whole platform can be changed, the vibration isolation object of Different Weight can be adapted to.
Accompanying drawing explanation
This specification comprises the following drawings, shown 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 part A in Fig. 4;
Fig. 6 is damping adjusting knob structural drawing;
Vibration-isolating platform jumps working view to Fig. 7;
Fig. 8 jumps working view under vibration-isolating platform.
Be labeled as in figure:
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 is secondary; 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, be described in further detail the specific embodiment of the present invention, object helps those skilled in the art to have more complete, accurate and deep understanding to design of the present invention, technological scheme, and contribute 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 for carrying vibration isolation object, and 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; Longitudinally arrange in the cavity that damping assembly is included in fixed platform framework 8 and the adjustable upper damping assembly 3 of damping and lower damping assembly 4, 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, with fixed platform framework 8 for turning joint is connected.
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.The halfpace 9 that bearing assembly comprises the bearing table 10 for carrying vibration isolation object and is positioned at below bearing table 10, bearing table 10 is fixedly connected with halfpace 9 by three pillars 1, thus forms an entirety.Halfpace 9 is connected with damping assembly, as shown in the figure, upper damping assembly 3 in the outside of halfpace 9 centered by the axis of fixed platform framework 8 line be circumferentially provided with three, lower damping assembly 4 in the below of halfpace 9 centered by the axis of fixed platform framework 8 line be circumferentially provided with three, upper damping assembly 3 and lower damping assembly 4 and for being uniformly distributed.Halfpace 9 entirety is discoid, coaxial with fixed platform framework 8 under original state, and halfpace 9 and bearing table 10 can move upward from the opening end of fixed platform framework 8 and stretch out.
The cavity inner bottom part of fixed platform framework 8 is provided with the limiting stopper 7 be positioned at below halfpace 9, and this limiting stopper 7 adopts rubber to make, and in order to limit bearing table 10 displacement excessive instantaneously, as shown in Figure 8, can play overload protective function to vibration-isolating platform.
Upper damping assembly 3 is substantially identical with the structure of lower damping assembly 4, 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 size is less than the size of lower damping assembly 4, and spring rate between the two can not be identical with the damping size of vibration damper.Vibration damper is adjustable-damping shock absorber, makes the damping of damping assembly 3 and lower damping assembly 4 adjustable.Vibration damper is connected with halfpace 9 and fixed platform framework 8 respectively by the mounting structure at two ends, the mounting structure of upper end is be arranged on three spherical hinges 2 that the periphery of halfpace 9 and bottom surface be circumferentially evenly arranged respectively, the periphery of halfpace 9 is provided with three grooves holding 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 three the rotary hinge seats 6 be circumferentially evenly arranged and the rotary hinge 5 being arranged on each vibration damper underpart, rotary hinge 5 is rotationally connected by a rotating shaft and rotary hinge seat 6.
Vibration damper is also provided with the upper spring seat 12 and lower spring cup that are connected with the top and bottom of spring 13 respectively, upper spring seat 12 is fixedly mounted on vibration damper, lower spring cup and vibration damper are for being threaded, position-adjustable, thus lower spring cup can be made to move along the axis of vibration damper, to change the initial compression amount of spring 13.Three upper three springs 13 of damping assembly 3 coordinate with three springs 13 of three lower damping assemblies 4, whole vibration-isolating platform can be made to have accurate zero stiffness characteristic, can improve the anti-vibration performance of platform, expand the vibration isolation frequency bandwidth of platform.Like this, the vibration isolating effect that platform reaches best can be made.
This vibration-isolating platform can according to the weight of load, regulate the position of the lower spring cup in each lower damping assembly 4 on each vibration damper, to change the initial compression amount of the spring 13 in lower damping assembly 4, thus the height of halfpace 9 can be adjusted, 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; By regulating the damping of vibration damper, the contradiction of low-frequency vibration transmissibility and dither decrement can be solved, makes vibration-isolating platform be in optimum Working simultaneously.
Whole vibration-isolating platform operationally, first according to the weight of vibration isolation object, regulate the height of the lower spring cup on three vibration dampers below halfpace 9, make 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 more large rigidity; Again according to extraneous vibration source excitation situation, regulate the damping of vibration damper; 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 the power applied is in circumference, to make whole platform rigidity trend 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, meet engineering practicability on a large scale, can be applicable to the vibration isolation of precision or ultraprecise instrument.If vibration isolation is less demanding, halfpace 9 can not be needed 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, platform still can be made to 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 damper regulation mechanism for regulating piston assembly damping force comprising oil storage cylinder 35, clutch release slave cylinder 22, piston assembly and be 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 end, and upper spring seat 12 is fixedly connected with the upper end of hollow piston rod 18.
The vibration damper of damping assembly mainly by improving the internal structure of piston valve assembly, to realize the adjustment 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 holding rotary spool 20, valve pocket is circular cavity body, rotary spool 20 entirety is cylindrical, and rotary spool 20 is provided with the center hole that extends vertically and radially runs through rotary spool 20 and the spool damp channel 37 be communicated with center hole, and fluid is flowed 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 uniformly distributed along rotary spool 20 circumference, and the angle between the axis of adjacent two spool damp channels 37 is 30 degree.In order to possess the effect that damping regulates, the pore size of six spool damp channels 37 is different, along the axis of rotary spool 20, six spool damp channels 37 set gradually according to aperture is descending, namely the aperture near the spool damp channel 37 of hollow piston rod 18 is maximum, and the aperture away from the spool damp channel 37 of hollow piston rod 18 is minimum.The inside of piston only 21 is also provided with two the main damp channels 30 laying respectively at rotary spool 20 both sides and several radial guiding through holes 23 being communicated with each spool damp channel 37 and main damp channel 30, and main damp channel 30 upwards extends towards piston only 21 inside along the direction with piston only 21 axis being parallel from the lower end surface of piston only 21.Radial guiding through hole 23 is respectively equipped with six in both sides, radial guiding through hole 23 is along the extension of piston only 21 radial direction and the axis of each radial guiding through hole 23 parallels, 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 radial guiding through hole 23 at every turn, form the passage of fluid, the epicoele of ON operation cylinder 22 and cavity of resorption.On rotary spool 20, other hole is closed by piston only 21 inwall, not conducting.This vibration damper is turned an angle by rotary spool 20, the spool damp channel 37 of different pore size is communicated with the radial guiding through hole 23 of respective aperture, due to the change in aperture, the size of oil passage can be changed, control the size of the fluid flow between clutch release slave cylinder 22 cavity of resorption and epicoele, and then reach the object changing 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, the damping adjusting knob 27 that rotates for drived control bar 17 and the lid 29 be located on upper spring seat 12.Lid 29 is fixedly mounted on the end face of upper spring seat 12, and lid 29 inside is provided with a cavity.Damping adjusting knob 27 is made up of discoid knob body and the knob shaft being located at knob body, the surface of knob body indicates the numeral representing gear, one end of knob shaft is inserted in the cavity of lid 29, and the sidewall of lid 29 is provided with the jack allowing running shaft pass.The periphery of running shaft is along the circumferential direction evenly provided with six gear fixed grooves, a groove represents a gear, locking ball 26 is provided with in this gear fixed groove, the internal face of jack is also provided with the locating slot holding locking ball 26, a positioning screwn 25 is installed with in this locating slot, the retaining spring in compressive state is accompanied between positioning screwn 25 and locking ball 26, 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, carry out drived control bar 17 by the rotation of damping adjusting knob 27 to rotate, 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 be communicated with the center hole of rotary spool 20, controlling rod 17 is also provided with and radially runs through and several radial holes 24 be communicated with axial via 19, the number of radial hole 24 is equal with the number of spool damp channel 37, also be six, the axis of six radial holes 24 is positioned at same plane and along the circumference of controlling rod 17 for being uniformly distributed, in addition, position hollow piston rod 18 is positioned at above piston valve assembly is provided with radially to be run through and is communicated with the upper chamber of clutch release slave cylinder 22 through hole 36 corresponding with the radial hole 24 on controlling rod 17, the axis of through hole 36 and the axis being parallel of radial guiding through hole 23, the number of through hole 36 can be arranged to equal with radial hole 24 number, or only arrange one.At each gear, guarantee that the through hole 36 on hollow piston rod 18 sidewall 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 form with main damp channel 30 passage allowing fluid flow being communicated with clutch release slave cylinder 22 epicoele and cavity of resorption.
Fluid in above-mentioned vibration damper can pass through formed passage and flow between the epicoele and cavity of resorption of clutch release slave cylinder 22, simultaneously also be provided with single-phase conducting in the bottom of piston only 21 and the different stretching valve 31 of conducting direction and flowing valve 32, stretching valve 31 and flowing valve 32 lay respectively at the lower ending opening place of a main damp channel 30.The compression valve 34 that the base of the inner bottom part of clutch release slave cylinder 22 is arranged and recuperation valve 33 can be communicated with the fluid between the cavity of resorption of clutch release slave cylinder 22 and oil storage cylinder 35.When compression stroke, refer to that piston moves downward, by compression, the piston only 21 now in clutch release slave cylinder 22 moves down vibration damper.The volume reducing of piston lower chambers, oil pressure raises, and fluid flows through flowing valve 32, flow to chamber (epicoele) above piston.Epicoele have been accounted for a part of space by hollow piston rod 18, and the volume that thus epicoele increases is less than the volume that cavity of resorption reduces, so a part of fluid just pushes compression valve 34 open, flows back to oil storage cylinder 35.The damping force that the throttling formation vibration damper of these valves to oil moves by compression.Vibration damper, when extension stroke, refers to piston upwards, 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 come 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 the fluid at this moment 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 to vibration damper when stretching exercise.
The damping of vibration damper is the vibrational energy in order to consumption systems, and the resistance of shock absorber of said structure is adjustable, and one is in order to the size according to system vibration energy, correspondingly changes damping, vibration Shaoxing opera is strong, and damping can tune up, to consume vibrational energy fast; Two is the damping ratios in order to change whole vibration-isolating platform, to adapt to various engineer applied, reaches 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 establishes female straight tube body, the screw flight arranged with the spherical hinge 2 on halfpace 9 and lid 29 end face respectively at two ends is connected, and the vibration damper base 16 that oil storage cylinder 35 lower end end cap is arranged 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 possessing damping adjustable function all can be suitable for this vibration-isolating platform.
The upper and lower noun of locality that waits involved in foregoing is all for benchmark defines with the vertical orientation upward of the opening end of locating platform framework, the upper end of vibration damper refers to and one end that halfpace 9 is connected, and the lower end of vibration damper refers to and one end that fixed platform framework 8 is connected.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 to invention has been exemplary description.Obviously, specific implementation of the present invention is not subject to the restrictions described above.As long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technological scheme is carried out; Or without improvement, above-mentioned design of the present invention and technological scheme directly applied to other occasion, all within protection scope of the present invention.
Claims (7)
1. there is a damping adjustable shock isolation platform for accurate zero stiffness, it 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 being provided with an opening end and being communicated with opening end, accommodates bearing assembly and damping assembly in cavity;
Damping assembly, to be included in cavity and longitudinally to arrange and the adjustable upper damping assembly of damping and lower damping assembly, bearing assembly is connected with fixed platform framework with lower damping assembly by upper damping assembly;
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 lower spring cup that are connected with the top and bottom of spring respectively;
The damper regulation mechanism for regulating piston assembly damping force that described vibration damper comprises oil storage cylinder, clutch release slave cylinder, piston assembly and is 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 holding rotary spool, rotary spool is provided with the center hole that extends vertically and radially runs through rotary spool and the spool damp channel be communicated with center hole, spool damp channel is axially arranged with different several of pore size along rotary spool and is uniformly distributed along rotary spool circumference, two the main damp channels laying respectively at rotary spool both sides and several radial guiding through holes being communicated with each spool damp channel and main damp channel are provided with in piston only, radial guiding through hole along piston only radial direction extend and the axis of each radial guiding through hole parallel.
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 provided with three in the 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 is circumferentially provided with three in the below of described bearing assembly.
4. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 1 or 2 or 3, is characterized in that: described lower spring cup and described vibration damper are for being threaded.
5. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 4, it is characterized in that: described damper regulation mechanism comprises rotating controlling rod in the described hollow piston rod of insertion, the damping adjusting knob rotated for drived control bar and the lid be located 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, the axial via be communicated with the center hole of described rotary spool is provided with in controlling rod, controlling rod is provided with and radially runs through and several radial holes be communicated with axial via, the number of radial hole is equal with the number of described spool damp channel and be uniformly distributed along controlling rod circumference, hollow piston rod is provided with and radially runs through and be communicated with the through hole of the radial hole on the upper chamber of described clutch release slave cylinder and controlling rod.
6. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 5, it is characterized in that: the halfpace that described bearing assembly comprises the bearing table for carrying vibration isolation object and is positioned at below bearing table, bearing table is connected with halfpace by pillar, and halfpace is connected with described damping assembly.
7. the damping adjustable shock isolation platform with accurate zero stiffness according to claim 6, is characterized in that: the cavity inner bottom part of described fixed platform framework is provided with the limiting stopper be positioned at below described halfpace.
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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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| 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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| US11565763B1 (en) | 2022-01-10 | 2023-01-31 | Toyota Motor Engineering & Manufacturing North America. Inc. | Bicycle saddle with spring-based vibration isolation |
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