CN115523254B - Wide-stroke Gao Jingzai connecting rod type quasi-zero stiffness vibration isolator - Google Patents
Wide-stroke Gao Jingzai connecting rod type quasi-zero stiffness vibration isolator Download PDFInfo
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- CN115523254B CN115523254B CN202211163144.XA CN202211163144A CN115523254B CN 115523254 B CN115523254 B CN 115523254B CN 202211163144 A CN202211163144 A CN 202211163144A CN 115523254 B CN115523254 B CN 115523254B
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- 230000003287 optical effect Effects 0.000 claims abstract description 62
- 238000013016 damping Methods 0.000 claims abstract description 33
- 238000002955 isolation Methods 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 5
- 238000005253 cladding Methods 0.000 claims 1
- 230000003068 static effect Effects 0.000 abstract description 15
- 238000010521 absorption reaction Methods 0.000 description 9
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 230000009467 reduction Effects 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000006096 absorbing agent Substances 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/063—Negative stiffness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/0052—Physically guiding or influencing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a wide-stroke Gao Jingzai connecting rod type quasi-zero stiffness vibration isolator, which comprises the following components: the supporting mechanism comprises a base plate, four upright post guide rails are fixedly arranged on the top surface of the base plate, the four upright post guide rails are connected with a platform center column in a sliding manner through a vibration damping assembly, and an objective table is fixedly arranged at the top end of the platform center column; the vibration isolation mechanism is arranged between four upright post guide rails and comprises a diagonal connecting piece, the center of the top surface of the diagonal connecting piece is fixedly connected with one end of the platform center column, which is far away from the object stage, the two ends of the diagonal connecting piece are symmetrically provided with optical axis components, each optical axis component comprises a long optical axis, one end of the diagonal is hinged to the center section of the side wall of the long optical axis, the other end of the diagonal is hinged to the end of the diagonal connecting piece, two ends of the long optical axis are respectively hinged to a short optical axis, and two short optical axes on the same side are hinged to a horizontal component. The invention can realize high static bearing capacity and simultaneously has the capacity of wide stroke, wide frequency and low frequency vibration isolation.
Description
Technical Field
The invention relates to the field of low-frequency vibration control, in particular to a wide-stroke Gao Jingzai connecting rod type quasi-zero stiffness vibration isolator.
Background
In engineering, vibration damping is a main means for coping with vibration hazards, and is generally classified into active vibration damping and passive vibration damping. Active damping is considered at the beginning of the design to eliminate or reduce the energy of the vibration source. Passive vibration damping is a remedial vibration damping measure taken after vibration occurs in the operation of the structure.
Active vibration damping is considered the most fundamental and effective method, but it is costly and most structures are subject to vibrations that are uncontrollable (e.g., seismic excitation, atmospheric turbulence, wind and wave impact, etc.), resulting in undesirable vibration damping in many cases. Therefore, this method is less applicable in common engineering equipment.
Compared with active vibration reduction, passive vibration reduction is widely applied to engineering vibration control and mainly comprises damping vibration absorption, dynamic vibration absorption, vibration isolation and the like. The damping vibration absorption is to install a damper on a vibration target structure or to increase the structural damping of the vibration target structure by adopting a method of adding damping materials, such as damping paint, damping interlayer and the like, and vibration energy of the structure is effectively attenuated by damping energy consumption, so that the vibration amplitude of the vibration of the target structure is reduced, and the damping effect of the damping on the vibration is particularly obvious especially near the resonance frequency of the system. Dynamic vibration absorption is to add a subsystem (dynamic vibration absorber) to the target structure, and reduce the vibration of the target structure by using an energy transmission mechanism caused by resonance of the dynamic vibration absorber. When the natural frequency of the dynamic vibration absorber is matched with the excitation frequency, the additional spring and the mass provide accurate external excitation control force for the target structure, and a high vibration reduction effect can be achieved. The vibration isolation is usually to connect a subsystem in series between the vibration source and the target structure to reduce the influence of the excitation of the vibration source on the target structure and reduce or isolate the vibration transmission between the target structure and the outside.
In summary, the vibration reduction means in the engineering is mainly classified into attenuation or elimination of vibration source in active vibration reduction, improvement of vibration resistance of the structure, avoidance of resonance area, appropriate increase of damping, dynamic vibration absorption, vibration isolation measures and the like in passive vibration reduction. The most common and easy-to-operate vibration reduction means are vibration absorption and vibration isolation of a vibration target by using a vibration absorber and a vibration isolator. However, the conventional vibration absorption and isolation method is difficult to detect the effective vibration absorption frequency of the vibration absorption and isolation method to the low frequency and ultra-low frequency range. So that many low-frequency vibration problems in engineering cannot be effectively solved.
Disclosure of Invention
The invention aims to provide a wide-stroke Gao Jingzai connecting rod type quasi-zero stiffness vibration isolator so as to solve the problems in the prior art.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a wide-stroke Gao Jingzai connecting rod type quasi-zero stiffness vibration isolator, which comprises the following components:
the supporting mechanism comprises a base plate, four upright post guide rails are fixedly arranged on the top surface of the base plate, the four upright post guide rails are encircled to form a square, the four upright post guide rails are slidably connected with a platform center column through a vibration damping assembly, and an objective table is fixedly arranged at the top end of the platform center column;
Vibration isolation mechanism, vibration isolation mechanism sets up four between the stand guide rail, and is located the objective table below, vibration isolation mechanism includes the diagonal connecting piece, the top surface center department of diagonal connecting piece with the platform center post is kept away from the one end rigid coupling of objective table, diagonal connecting piece both ends symmetry is equipped with the optical axis subassembly, the optical axis subassembly includes long optical axis, the lateral wall center section of long optical axis articulates there is the one end of diagonal, the other end of diagonal with the tip of diagonal connecting piece articulates, the both ends of long optical axis articulate respectively have short optical axis, are located two of same one side articulated horizontal component between the short optical axis, two horizontal component symmetry sets up the both sides of diagonal connecting piece.
Preferably, the vibration damping assembly comprises a supporting frame, the supporting frame is fixedly sleeved on the platform center column, four ends of the supporting frame are fixedly connected with linear bearings respectively, the four linear bearings are respectively connected to the four upright guide rails in a sliding mode, positioning clamps are respectively fixedly sleeved on the upright guide rails, the positioning clamps are located below the linear bearings, a load spring is fixedly connected between the positioning clamps and the linear bearings, and the load spring is sleeved on the upright guide rails.
Preferably, the horizontal assembly comprises a horizontal spring guide rail, two ends of the horizontal spring guide rail are fixedly mounted on the base plate through first guide rail supporting seats respectively, a double-pass joint is connected to the horizontal spring guide rail in a sliding mode, two ends of the double-pass joint are hinged to two ends of the short optical axis opposite to each other respectively, a horizontal spring is sleeved on the horizontal spring guide rail, and the horizontal spring is fixedly connected between the double-pass joint and the first guide rail supporting seats close to the diagonal connecting piece.
Preferably, guide rail joints are symmetrically and fixedly connected on the long optical axis, the two guide rail joints are respectively positioned on two sides of the inclined rod, a horizontal bearing guide rail is connected to the guide rail joints in a sliding mode, two ends of the horizontal bearing guide rail penetrate through the guide rail joints, two ends of the horizontal bearing guide rail are respectively fixedly installed on the base plate through second guide rail supporting seats, and a horizontal bearing is fixedly installed at the end portion, away from the inclined rod connecting piece, of the horizontal bearing guide rail.
Preferably, both ends of the long optical axis are hinged with the two short optical axes through optical axis hinges respectively.
Preferably, the base plate is square, the packing plates are fixedly connected to the four side walls of the base plate, an upper base plate is fixedly connected between the top ends of the four packing plates, through holes larger than the size of the objective table are formed in the positions, corresponding to the objective table, of the upper base plate, and the top ends of the upright post guide rails are fixedly connected with the bottom surface of the upper base plate.
Preferably, support reinforcing plates are fixedly connected between the base plate and four sides of the upper base plate, four support reinforcing plates are respectively located on the inner sides of the four packaging plates, and the four support reinforcing plates cover four upright guide rails and have gaps with the four upright guide rails.
The invention discloses the following technical effects:
the vibration damping assembly can provide negative rigidity in the vertical direction by arranging the vibration damping weights on the object stage through the two optical axis assembly structures which are symmetrically arranged, and meanwhile, the vibration damping assembly is arranged on the platform center column in the vertical direction, and the negative rigidity of the horizontal assembly is counteracted by utilizing the positive rigidity of the vibration damping assembly, so that the quasi-zero rigidity design is realized. The quasi-zero stiffness vibration isolator overcomes the defect that the traditional linear vibration isolator cannot achieve both low vibration isolation initial frequency and higher static bearing capacity, and achieves dynamic characteristics of high static stiffness and low dynamic stiffness.
The negative rigidity is introduced through the delicate design of the long optical axis, the short optical axis and the horizontal component structure, so that the vibration isolator has higher static rigidity and lower dynamic rigidity, simultaneously meets the requirements of static high bearing capacity and dynamic low-frequency vibration isolation, and has the capacity of wide stroke, wide frequency and low-frequency vibration isolation while realizing higher static bearing capacity, and has good vibration isolation effect; in addition, the vibration isolator has the advantages of simple integral structure, convenient part processing, low raw material cost, no energy consumption of an actuator, and provides an effective and economic benefit, and a new environment-friendly scheme for low-frequency vibration isolation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of the external structure of the present invention;
FIG. 2 is a perspective view of the internal structure of the present invention;
fig. 3 is a perspective view of the vibration isolation mechanism of the present invention;
Wherein, 1, an objective table; 2. an upper seat plate; 3. a packaging plate; 4. supporting the reinforcing plate; 5. a platform center column; 6. a support frame; 7. a linear bearing; 8. a load spring; 9. a base plate; 10. positioning a clamp; 11. a column guide rail; 12. a diagonal rod connector; 13. a diagonal rod; 14. a rail joint; 15. an optical axis hinge; 16. a first rail support; 17. a long optical axis; 18. a horizontal spring rail; 19. a two-way joint; 20. a horizontal spring; 21. a horizontal bearing rail; 22. a short optical axis; 23. a horizontal bearing; 24. and the second guide rail supporting seat.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 1-3, the present invention provides a wide travel, gao Jingzai link quasi-zero stiffness vibration isolator comprising:
The supporting mechanism comprises a base plate 9, four upright post guide rails 11 are fixedly arranged on the top surface of the base plate 9, the four upright post guide rails 11 are encircled to form a square, the four upright post guide rails 11 are slidably connected with a platform center column 5 through a vibration damping assembly, and an objective table 1 is fixedly arranged at the top end of the platform center column 5;
vibration isolation mechanism sets up between four upright guide rails 11, and be located objective table 1 below, vibration isolation mechanism includes down tube connecting piece 12, the top surface center department of down tube connecting piece 12 and the one end rigid coupling that platform center post 5 kept away from objective table 1, down tube connecting piece 12 both ends symmetry is equipped with the optical axis subassembly, the optical axis subassembly includes long optical axis 17, the one end that has down tube 13 is articulated to the lateral wall center section of long optical axis 17, the other end of down tube 13 is articulated with the tip of down tube connecting piece 12, the both ends of long optical axis 17 are articulated respectively to have short optical axis 22, articulated horizontal component between two short optical axes 22 that are located same one side, two horizontal component symmetry set up in the both sides of down tube connecting piece 12.
The vibration damping assembly can provide negative rigidity in the vertical direction by arranging the vibration damping weights on the object stage 1 through the symmetrical two optical axis assembly structures, meanwhile, the vibration damping assembly is arranged on the platform center post 5 in the vertical direction, and the negative rigidity of the horizontal assembly is counteracted by utilizing the positive rigidity of the vibration damping assembly, so that the quasi-zero rigidity design is realized. The quasi-zero stiffness vibration isolator overcomes the defect that the traditional linear vibration isolator cannot achieve both low vibration isolation initial frequency and higher static bearing capacity, and achieves dynamic characteristics of high static stiffness and low dynamic stiffness.
The negative rigidity is introduced through the delicate design of the long optical axis 17, the short optical axis 22 and the horizontal component structure, so that the vibration isolator has higher static rigidity and lower dynamic rigidity, simultaneously meets the requirements of static high bearing capacity and dynamic low-frequency vibration isolation, and has the capacity of wide stroke, wide frequency and low-frequency vibration isolation while realizing higher static bearing capacity, and has good vibration isolation effect; in addition, the vibration isolator has the advantages of simple integral structure, convenient part processing, low raw material cost, no energy consumption of an actuator, and provides an effective and economic benefit, and a new environment-friendly scheme for low-frequency vibration isolation.
Further optimizing scheme, the vibration damping assembly includes support frame 6, and support frame 6 fixed cover is established on platform center post 5, and four tip rigid couplings of support frame 6 have linear bearing 7 respectively, and four linear bearing 7 sliding connection are on four stand guide rails 11 respectively, and the last fixed cover of four stand guide rails 11 respectively is equipped with location clamp 10, and location clamp 10 is located the linear bearing 7 below, and the rigid coupling has load spring 8 between location clamp 10 and the linear bearing 7, and load spring 8 cover is established on stand guide rail 11.
The supporting frame 6 moves downwards to drive the four linear bearings 7 to slide up and down on the four upright post guide rails 11 respectively, so that the load spring 8 is compressed.
Further optimizing scheme, the horizontal component includes horizontal spring guide rail 18, and horizontal spring guide rail 18 both ends are respectively through first guide rail supporting seat 16 fixed mounting on bed plate 9, and sliding connection has the bi-pass to connect 19 on the horizontal spring guide rail 18, and the both ends that the bi-pass connects 19 are respectively with two short optical axis 22 opposite one end articulated, the cover is equipped with horizontal spring 20 on the horizontal spring guide rail 18, and horizontal spring 20 rigid coupling is between bi-pass to connect 19 and be close to diagonal connecting piece 12's first guide rail supporting seat 16.
The two-way joint 19 is used to connect two short optical axes 22 and the horizontal spring 20 compresses as the two-way joint 19 slides on the horizontal spring rail 18.
According to a further optimization scheme, guide rail joints 14 are symmetrically and fixedly connected to a long optical axis 17, two guide rail joints 14 are respectively located on two sides of an inclined rod 13, a horizontal bearing guide rail 21 is slidably connected to the guide rail joints 14, two ends of the horizontal bearing guide rail 21 penetrate through the guide rail joints 14, two ends of the horizontal bearing guide rail 21 are respectively fixedly mounted on a base plate 9 through second guide rail supporting seats 24, and a horizontal bearing 23 is fixedly mounted at the end part, away from the inclined rod connecting piece 12, of the horizontal bearing guide rail 21.
When the short optical axis 22 is displaced, the rail joint 14 slides on the horizontal bearing rail 21 to drive the long optical axis 17 to move.
Further preferably, both ends of the long optical axis 17 are hinged with two short optical axes 22 through optical axis hinges 15, respectively.
Further optimizing scheme, bed plate 9 is square, and four lateral walls of bed plate 9 all rigid coupling have packing plate 3, and the rigid coupling has upper saddle 2 between the top of four packing plates 3, and the through-hole that is greater than objective table 1 size has been seted up to upper saddle 2 and objective table 1 corresponding position, and the bottom surface rigid coupling of four stand guide rail 11 and upper saddle 2.
According to the further optimization scheme, the supporting and reinforcing plates 4 are fixedly connected between the base plate 9 and the four sides of the upper base plate 2, the four supporting and reinforcing plates 4 are respectively located on the inner sides of the four packaging plates 3, and the four supporting and reinforcing plates 4 cover the four upright post guide rails 11 and are provided with gaps with the four upright post guide rails 11.
Working principle: when the vibration isolator is in a static balance state, the diagonal rod 13 is pressed down by the support frame 6 to be in a horizontal position, so that the long optical axis 17 and the short optical axis 22 are in a rectangular shape at the horizontal position, and the horizontal spring 20 is in a maximum compression state. Theoretical calculation is carried out according to the geometric relation of the structure, so that the vibration isolator has higher static rigidity, namely higher static bearing capacity; when the vibration isolation weight is disturbed and vibrated, the horizontal spring 20 stretches, the joint of the two ends of the spring is stressed in the y direction, the inclined rod 13 and the short optical axis 22 displace, and the two long optical axes 17 are driven to move in opposite directions, so that the objective table 1 moves upwards (downwards). Theoretical calculation is conducted according to the geometrical relation before and after vibration, so that the whole vibration isolator has extremely low dynamic stiffness, namely the vibration isolation initial frequency is low, and low-frequency and ultra-low-frequency vibration isolation is realized. Meanwhile, by controlling the lengths of the long optical axis 17 and the short optical axis 22, the quasi-zero stiffness range can be controlled, the vibration isolation frequency is greatly widened, and the wide-stroke low-frequency vibration isolation effect is realized. And selecting a spring with larger rigidity according to different bearing objects, so as to meet the high bearing requirement of the vibration isolator under low-frequency vibration isolation.
Embodiments are described below: the weight to be vibration-isolated is placed on the stage 1, and the vibration isolator base plate 9 is placed on the vibration source or foundation. When the system is disturbed and vibrated, the horizontal spring 20 of the vibration isolator stretches, and the short optical axis 22 drives the long optical axis to move in opposite directions, so that the objective table 1 is driven to move up and down. The horizontal spring 20 provides negative stiffness for the vertical direction, and counteracts positive stiffness provided by the four load springs 8 in the vertical direction of the vibration isolator, so that quasi-zero stiffness of the vibration isolator is realized, and the vibration isolator has high static and low dynamic characteristics.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (5)
1. A wide travel, gao Jingzai link quasi-zero stiffness vibration isolator comprising:
the supporting mechanism comprises a base plate (9), four upright post guide rails (11) are fixedly arranged on the top surface of the base plate (9), the four upright post guide rails (11) are encircled to form a square, the four upright post guide rails (11) are slidably connected with a platform center column (5) through a vibration damping assembly, and an objective table (1) is fixedly arranged on the top end of the platform center column (5);
The vibration isolation mechanism is arranged among four upright guide rails (11) and is positioned below the objective table (1), the vibration isolation mechanism comprises a diagonal rod connecting piece (12), the center of the top surface of the diagonal rod connecting piece (12) is fixedly connected with one end, far away from the objective table (1), of the platform center column (5), optical axis components are symmetrically arranged at two ends of the diagonal rod connecting piece (12), each optical axis component comprises a long optical axis (17), one end of a diagonal rod (13) is hinged to the center section of the side wall of the long optical axis (17), the other end of the diagonal rod (13) is hinged to the end part of the diagonal rod connecting piece (12), two short optical axes (22) are hinged to two ends of the long optical axis (17) respectively, and horizontal components are symmetrically arranged at two sides of the diagonal rod connecting piece (12);
the horizontal assembly comprises a horizontal spring guide rail (18), two ends of the horizontal spring guide rail (18) are fixedly arranged on the base plate (9) through first guide rail supporting seats (16) respectively, a two-way joint (19) is connected to the horizontal spring guide rail (18) in a sliding mode, two ends of the two-way joint (19) are hinged to two ends, opposite to the two short optical axes (22), of the two-way joint respectively, a horizontal spring (20) is sleeved on the horizontal spring guide rail (18), and the horizontal spring (20) is fixedly connected between the two-way joint (19) and the first guide rail supporting seats (16) close to the diagonal connecting piece (12);
The long optical axis (17) is symmetrically and fixedly connected with guide rail joints (14), the two guide rail joints (14) are respectively located on two sides of the inclined rod (13), a horizontal bearing guide rail (21) is connected to the guide rail joints (14) in a sliding mode, two ends of the horizontal bearing guide rail (21) penetrate through the guide rail joints (14), two ends of the horizontal bearing guide rail (21) are respectively fixedly installed on the base plate (9) through second guide rail supporting seats (24), and the end portion, away from the inclined rod connecting piece (12), of the horizontal bearing guide rail (21) is fixedly provided with a horizontal bearing (23).
2. The wide travel Gao Jingzai link quasi-zero stiffness vibration isolator as claimed in claim 1, wherein: the vibration damping assembly comprises a supporting frame (6), the supporting frame (6) is fixedly sleeved on a platform center column (5), four ends of the supporting frame (6) are fixedly connected with linear bearings (7) respectively, the four linear bearings (7) are connected to the upright guide rails (11) in a sliding mode respectively, the upright guide rails (11) are fixedly sleeved with positioning clamp rings (10) respectively, the positioning clamp rings (10) are located below the linear bearings (7), load springs (8) are fixedly connected between the positioning clamp rings (10) and the linear bearings (7), and the load springs (8) are sleeved on the upright guide rails (11).
3. The wide travel Gao Jingzai link quasi-zero stiffness vibration isolator as claimed in claim 1, wherein: both ends of the long optical axis (17) are respectively hinged with the two short optical axes (22) through optical axis hinging pieces (15).
4. The wide travel Gao Jingzai link quasi-zero stiffness vibration isolator as claimed in claim 1, wherein: the base plate (9) is square, packaging boards (3) are fixedly connected to four side walls of the base plate (9), an upper base plate (2) is fixedly connected between the tops of the packaging boards (3), through holes larger than the size of the objective table (1) are formed in positions, corresponding to the objective table (1), of the upper base plate (2), and the tops of the upright post guide rails (11) are fixedly connected with the bottom surface of the upper base plate (2).
5. The wide travel Gao Jingzai link quasi-zero stiffness vibration isolator as claimed in claim 4, wherein: support gusset plate (4) are fixedly connected between four sides of bed plate (9) with go up bedplate (2), four support gusset plate (4) are located four respectively packing plate (3) are inboard, and four support gusset plate (4) cladding is four stand guide rail (11) and with four have the clearance between stand guide rail (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211163144.XA CN115523254B (en) | 2022-09-23 | 2022-09-23 | Wide-stroke Gao Jingzai connecting rod type quasi-zero stiffness vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211163144.XA CN115523254B (en) | 2022-09-23 | 2022-09-23 | Wide-stroke Gao Jingzai connecting rod type quasi-zero stiffness vibration isolator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115523254A CN115523254A (en) | 2022-12-27 |
| CN115523254B true CN115523254B (en) | 2024-09-13 |
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| CN202211163144.XA Active CN115523254B (en) | 2022-09-23 | 2022-09-23 | Wide-stroke Gao Jingzai connecting rod type quasi-zero stiffness vibration isolator |
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| CN106763466A (en) * | 2015-11-21 | 2017-05-31 | 北京工业大学 | A kind of novel positive and negative Stiffness low frequency vibration isolation mechanism |
| CN110388408A (en) * | 2019-08-30 | 2019-10-29 | 国网湖南省电力有限公司 | A kind of negative stiffness can harmonize zero stiffness isolation mounting and its application method |
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| CN112696454B (en) * | 2020-12-28 | 2021-10-08 | 哈尔滨工程大学 | Magnetic suspension type quasi-zero stiffness electromagnetic vibration isolator with active negative stiffness |
| CN112963478A (en) * | 2021-03-26 | 2021-06-15 | 北京工业大学 | Tunable quasi-zero-stiffness vibration isolation device for buckling spring |
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| CN110388408A (en) * | 2019-08-30 | 2019-10-29 | 国网湖南省电力有限公司 | A kind of negative stiffness can harmonize zero stiffness isolation mounting and its application method |
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