CN211774735U - Quasi-zero stiffness vibration isolator for bending beam - Google Patents
Quasi-zero stiffness vibration isolator for bending beam Download PDFInfo
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- CN211774735U CN211774735U CN202020004436.9U CN202020004436U CN211774735U CN 211774735 U CN211774735 U CN 211774735U CN 202020004436 U CN202020004436 U CN 202020004436U CN 211774735 U CN211774735 U CN 211774735U
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- 238000005452 bending Methods 0.000 title abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 59
- 230000000903 blocking effect Effects 0.000 claims description 18
- 238000002955 isolation Methods 0.000 abstract description 19
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model relates to a bucking roof beam quasi-zero rigidity isolator belongs to the vibration control field, its include the bottom plate and with bottom plate parallel arrangement's roof, the bottom plate with be provided with the connection between the roof positive rigidity mechanism and the negative stiffness mechanism of bottom plate and roof, negative stiffness mechanism includes the elastic arm of intercrossing setting, the elastic arm includes first base and second base, be provided with the roof of buckling of two relative settings between first base and the second base, the middle part bending outward of two roof beams of buckling sets up, the both ends of buckling the roof connect respectively in first base and second base, first base and second base through the pivot respectively the pin joint in the lower surface of roof and the upper surface of bottom plate. The utility model discloses demonstrate good vibration isolation performance in the very little condition of vibration amplitude, can be applicable to the isolation slight low frequency vibration.
Description
Technical Field
The utility model relates to a vibration control field, in particular to bucking roof beam quasi-zero rigidity isolator.
Background
With the continuous development of modern science and technology, the position of vibration isolation technology in industrial production and engineering projects is more and more important. Vibration control at low or ultra-low frequencies has long been a problem. The existing quasi-zero stiffness vibration isolator adopts a spring as a negative stiffness mechanism, the spring can occupy a large installation space, the miniaturization of the quasi-zero stiffness vibration isolator is not facilitated, the occurrence of a buckling beam provides the possibility of a novel negative stiffness structure, and the further development of the research of the quasi-zero stiffness low-frequency vibration control technology is promoted.
The existing quasi-zero stiffness vibration isolator can show good vibration isolation performance only under the state of large vibration amplitude. When the external vibration amplitude is small, the ideal vibration isolation effect cannot be achieved. The bending beam quasi-zero stiffness vibration isolator can show good vibration isolation performance under the condition of small vibration amplitude, and is a vibration isolator suitable for isolating micro-amplitude low-frequency vibration. The micro-amplitude low-frequency vibration isolation device has the advantages that certain bearing capacity can be guaranteed, small dynamic stiffness is achieved, micro-amplitude low-frequency vibration isolation can be achieved well, and the implementation method is simple and convenient.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a quasi-zero stiffness vibration isolator for buckling beams, which includes a bottom plate and a top plate parallel to the bottom plate, a positive stiffness mechanism and a negative stiffness mechanism connected to the bottom plate and the top plate are disposed between the bottom plate and the top plate, the negative stiffness mechanism includes two elastic arms arranged in a cross manner, each elastic arm includes a first base and a second base, two buckling beams arranged oppositely are disposed between the first base and the second base, the middle portions of the two buckling beams are bent outward, the two ends of the buckling beam are respectively connected to the first base and the second base, and the first base and the second base are respectively pivoted to the lower surface of the top plate and the upper surface of the bottom plate through a rotating shaft.
The utility model discloses in, the bottom plate is used for fixing the isolator on bearing structure such as ground, and the roof is used for bearing by the vibration isolator, and bottom plate and roof and be located positive rigidity mechanism and the negative stiffness mechanism in the middle of bottom plate and the roof form a quasi-zero rigidity system, and quasi-zero rigidity system is zero at the dynamic stiffness of static balance position department, can be so that its rigidity of isolator is close to for zero under the prerequisite of guaranteeing the bearing capacity to demonstrate good low frequency vibration isolation performance.
The number of the positive stiffness mechanisms is one or more, and the positive stiffness mechanisms are used for supporting and stabilizing the top plate; the quantity of burden rigidity mechanism is one or more, and its specific quantity is decided according to the quantity and the specification of positive rigidity mechanism, in order to guarantee the utility model discloses can become quasi-zero rigidity system after placing by the vibration isolator.
The utility model discloses in, the both ends of elastic arm are pin-jointed in the lower surface of roof and the upper surface of bottom plate respectively through the pivot, then when the roof moves down because of bearing the weight of the quilt vibration isolation thing, the elastic arm can tend to be on a parallel with the bottom plate, and the elastic arm can be compressed this moment, and the bucking roof beam continues the bending outwards, and the bucking roof beam can produce an inward reaction force, and the elastic arm warp and produce negative rigidity promptly, and negative rigidity mechanism forms a quasi-zero rigidity system with positive rigidity mechanism this moment, just the utility model provides a quilt vibration isolation thing mainly provides the support by positive rigidity mechanism, and the bucking roof beam in the negative rigidity mechanism is high to the sensitivity of rigidity, therefore the utility model discloses in negative rigidity mechanism can make the isolator show good vibration isolation performance under the very little condition of vibration amplitude, can be applicable to isolating the low frequency; simultaneously, compare in the spring as negative stiffness structure in current isolator, the utility model provides a negative stiffness mechanism occupies installation space littleer, therefore can realize the miniaturization of isolator.
Additionally, the utility model provides a two elastic arm intercrossing settings in the negative stiffness mechanism, its torsion torque's that can avoid the isolator production, can also make the isolator be difficult for producing deformation when receiving the external force of horizontal direction simultaneously.
Further, positive rigidity mechanism including fixed set up in the first mount pad of the upper surface of bottom plate with fixed set up in the second mount pad of the lower surface of roof, be provided with cylindrical spring between first mount pad and the second mount pad, cylindrical spring's upper end and lower extreme respectively with second mount pad and first mount pad fixed connection.
First mount pad and second mount pad can set up respectively on bottom plate and roof through fixed connection structure such as bolted connection structure, welded connection structure, and cylindrical spring's both ends can be connected on first mount pad and second mount pad through fixed connection structure such as bolted connection structure or welded connection structure.
Furthermore, a first mounting hole used for mounting a first mounting seat and a second mounting seat is formed in the bottom plate and the top plate, the first mounting hole penetrates through the bottom plate or the top plate, a first threaded hole is formed in the first base and the second base corresponding to the first mounting hole, and the first mounting seat and the second mounting seat are mounted in the first mounting hole through a bolt connecting structure.
The first mounting hole can be a threaded hole, and the first mounting seat and the second mounting seat are respectively fixed on the bottom plate and the top plate through bolts which are simultaneously mounted in the first threaded hole and the first mounting hole; or the first mounting hole is a through hole, the first mounting seat and the second mounting seat are respectively mounted on the bottom plate and the top plate through a bolt-nut connecting structure, wherein the upper end or the lower end of the first mounting hole is provided with a widening hole for accommodating a nut so as to keep the lower surface of the bottom plate and the upper surface of the top plate to be flush; in addition, the first mounting seat and the second mounting seat can be respectively fixed on the bottom plate and the top plate through welding connection structures.
Furthermore, two ends of the bent beam are provided with screw rods, and two ends of the bent beam are fixedly connected with the first base and the second base through the screw rods.
The buckling beam can be made of spring steel and is fixedly connected with the first base and the second base through bolt connecting structures through screws welded at two ends.
Further, the upper surface of bottom plate and the lower surface of roof correspond respectively first base and second base are provided with the support, the pivot is fixed set up in the support, first base and second base correspond the pivot is provided with the collar, the collar cover is located the pivot, just the inboard of collar is fixed and is provided with the rubber circle, the inboard of rubber circle with the surface counterbalance of pivot.
Wherein, the end of the rotating shaft can be provided with a blocking structure, such as a stop block, so as to prevent the mounting ring from being separated from the rotating shaft; a rubber ring is arranged between the rotating shaft and the mounting ring, so that the rotating shaft and the mounting ring can generate relative displacement within a certain range to offset the mounting error of the elastic arm.
Furthermore, a second mounting hole for mounting a support is formed in the bottom plate and the top plate, the second mounting hole penetrates through the bottom plate or the top plate, a second threaded hole is formed in the support corresponding to the second mounting hole, and the support is mounted in the second mounting hole through a bolt connecting structure.
The second mounting hole can be a threaded hole, and the bracket is fixed on the bottom plate and the top plate through bolts which are simultaneously mounted in the second threaded hole and the second mounting hole; or the second mounting hole is a through hole, the support is mounted on the bottom plate and the top plate through the bolt and nut connecting structure, wherein the widening hole used for containing the nut is formed in the upper end or the lower end of the first mounting hole, so that the lower surface of the bottom plate and the upper surface of the top plate are parallel and level.
Further, the second mounting hole comprises a round hole and a long hole, and the center of the round hole is located on the central line of the long hole in the length direction.
The support is arranged in the strip hole and can move along the length direction of the strip hole in the strip hole, so that the position of the support can be adjusted, two ends of one elastic arm in the negative stiffness mechanism are respectively pivoted to the support in the round hole in the top plate and the support in the strip hole in the bottom plate, two ends of the other elastic arm are respectively pivoted to the support in the strip hole in the top plate and the support in the round hole in the bottom plate, the two elastic arms are arranged in a crossed mode without mutual contact, the length of the elastic arms can be adjusted by adjusting the positions of the supports in the strip holes to adjust the compression amount of the bending beam, and therefore the vibration isolator can provide good vibration isolation performance under different loads.
Furthermore, a limiting mechanism used for limiting the moving stroke of the top plate relative to the bottom plate is further arranged between the bottom plate and the top plate.
The limiting mechanism is used for limiting the maximum stroke of the top plate relative to the bottom plate so as to prevent the negative stiffness mechanism from being damaged due to the fact that the top plate is excessively formed.
Furthermore, stop gear including fixed set up in gag lever post on the bottom plate with fixed set up in spacing support on the roof, the bottom of spacing support is provided with the lantern ring, the upper end of gag lever post is passed the lantern ring sets up, just spacing top is provided with the stop part, the width of stop part is greater than the internal diameter of the lantern ring.
The limiting rod and the limiting support are respectively fixedly connected with the bottom plate and the top plate through a bolt connecting structure or a welding structure, wherein the blocking portion limits upward movement of the blocking portion, so that the top plate is limited to move upwards relative to the bottom plate, and the top of the limiting rod can limit downward movement of the top plate.
Furthermore, the blocking part is arranged on the limiting rod in a position-adjustable manner.
The upper portion of the limiting rod is provided with external threads, the blocking portion is a nut, the blocking portion is installed on the upper portion of the limiting rod, the position of the blocking portion can be adjustably arranged on the limiting rod, and the maximum stroke of the top plate relative to the bottom plate can be adjusted by adjusting the position of the blocking portion on the limiting rod.
The principle and effect of the present invention will be further explained below with reference to the above technical solutions and the accompanying drawings:
the buckling beam in the negative stiffness mechanism has high sensitivity to stiffness, so that the negative stiffness mechanism can enable the vibration isolator to show good vibration isolation performance under the condition of small vibration amplitude, and can be suitable for isolating micro-amplitude low-frequency vibration; simultaneously, compare in the spring as negative stiffness structure in current isolator, the utility model provides a negative stiffness mechanism occupies installation space littleer, therefore can realize the miniaturization of isolator.
Drawings
Fig. 1 is a schematic cross-sectional structural view of a quasi-zero stiffness vibration isolator for a buckling beam according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a bottom plate according to an embodiment of the present invention;
fig. 3 is a first schematic structural diagram of the elastic arm according to the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second elastic arm according to an embodiment of the present invention.
Description of reference numerals:
1-bottom plate, 11-first mounting hole, 121-round hole, 122-long hole, 13-third mounting hole, 2-top plate, 31-first mounting seat, 32-second mounting seat, 33-cylindrical spring, 41-bent beam, 411-screw rod, 42-first base, 43-second base, 44-bracket, 45-mounting ring, 451-rubber ring, 51-limiting rod, 511-blocking part, 52-limiting bracket and 521-lantern ring.
Detailed Description
To facilitate understanding of those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples:
as shown in fig. 1 to 4, a quasi-zero stiffness vibration isolator for buckling beams comprises a bottom plate 1 and a top plate 2 arranged in parallel with the bottom plate 1, wherein a positive stiffness mechanism and a negative stiffness mechanism for connecting the bottom plate 1 and the top plate 2 are arranged between the bottom plate 1 and the top plate 2, the negative stiffness mechanism comprises two elastic arms arranged in a crossed manner, each elastic arm comprises a first base 42 and a second base 43, two buckling beams 41 arranged oppositely are arranged between the first base 42 and the second base 43, the middle parts of the two buckling beams 41 are arranged in an outward bending manner, two ends of each buckling beam 41 are respectively connected to the first base 42 and the second base 43, and the first base 42 and the second base 43 are respectively pivoted to the lower surface of the top plate 2 and the upper surface of the bottom plate 1 through rotating shafts.
The bottom plate 1 is used for fixing the vibration isolator on a foundation, the top plate 2 is used for bearing a vibration-isolated object, the bottom plate 1, the top plate 2, the positive stiffness mechanism and the negative stiffness mechanism which are positioned between the bottom plate 1 and the top plate 2 form a quasi-zero stiffness system, the dynamic stiffness of the quasi-zero stiffness system at a static balance position is zero, the stiffness of the vibration isolator is close to zero on the premise of ensuring the bearing capacity, and therefore excellent low-frequency vibration isolation performance is shown.
The number of the positive stiffness mechanisms is four, the positive stiffness mechanisms are distributed at four sharp corners of the square bottom plate 1 and are symmetrically distributed about a central line of the bottom plate 1 in the vertical direction, and the positive stiffness mechanisms are used for supporting the top plate 2 and enabling the top plate 2 to be stable; the number of the negative stiffness mechanisms is two, and the negative stiffness mechanisms are symmetrically distributed around a center line of the bottom plate 1 in the vertical direction. In another embodiment, the number of positive stiffness mechanisms is three, which are symmetrically distributed about the vertical center line of the base plate 1, and the number of negative stiffness mechanisms is two, which are symmetrically distributed about the vertical center line of the base plate 1.
The both ends of elastic arm are pin-jointed in the lower surface of roof 2 and the upper surface of bottom plate 1 respectively through the pivot, then when roof 2 moves down because of bearing the weight of the vibration isolation thing, the elastic arm can tend to be on a parallel with bottom plate 1, the elastic arm can be compressed this moment, buckling beam 41 continues to bend outwards, buckling beam 41 can produce an inward reaction force, namely the elastic arm warp and produces the negative stiffness, negative stiffness mechanism forms a quasi-zero stiffness system with positive stiffness mechanism this moment, just the utility model provides a vibration isolation thing mainly provides the support by positive stiffness mechanism, and buckling beam 41 in the negative stiffness mechanism is high to the sensitiveness of rigidity, therefore the utility model discloses well negative stiffness mechanism can make the vibration isolator demonstrate good vibration isolation performance in the very little condition of vibration amplitude, can be applicable to and keep apart the little low frequency vibration; simultaneously, compare in the spring as negative stiffness structure in current isolator, the utility model provides a negative stiffness mechanism occupies installation space littleer, therefore can realize the miniaturization of isolator.
Additionally, the utility model provides a two elastic arm intercrossing settings in the negative stiffness mechanism, its torsion torque's that can avoid the isolator production, can also make the isolator be difficult for producing deformation when receiving the external force of horizontal direction simultaneously.
The positive stiffness mechanism comprises a first mounting seat 31 fixedly arranged on the upper surface of the bottom plate 1 and a second mounting seat 32 fixedly arranged on the lower surface of the top plate 2, a cylindrical spring 33 is arranged between the first mounting seat 31 and the second mounting seat 32, and the upper end and the lower end of the cylindrical spring 33 are fixedly connected with the second mounting seat 32 and the first mounting seat 31 respectively.
The first mounting seat 31 and the second mounting seat 32 are respectively arranged on the bottom plate 1 and the top plate 2 through a bolt connection structure, and two ends of the cylindrical spring 33 are connected on the first mounting seat 31 and the second mounting seat 32 through a bolt connection structure. In another embodiment, the first and second mounting seats 31 and 32 are respectively disposed on the bottom plate 1 and the top plate 2 by a welded connection structure, and both ends of the cylindrical spring 33 are connected to the first and second mounting seats 31 and 32 by a welded connection structure.
The bottom plate 1 with set up the first mounting hole 11 that is used for installing first mount pad 31 and second mount pad 32 on the roof 2, first mounting hole 11 runs through bottom plate 1 or roof 2 sets up, first base 42 and second base 43 correspond first mounting hole 11 is provided with first screw hole, first mount pad 31 and second mount pad 32 pass through bolted connection structure install in first mounting hole 11.
The first mounting holes 11 are threaded holes, and the first mounting seat 31 and the second mounting seat 32 are fixed to the bottom plate 1 and the top plate 2 by bolts simultaneously mounted in the first threaded holes and the first mounting holes 11, respectively. In another embodiment, the first mounting hole 11 is a through hole, and the first mounting seat 31 and the second mounting seat 32 are respectively mounted on the bottom plate 1 and the top plate 2 through a bolt-and-nut connection structure, wherein a widened hole for accommodating a nut is formed at an upper end or a lower end of the first mounting hole 11 to maintain the lower surface of the bottom plate 1 and the upper surface of the top plate 2 to be flush. In another embodiment, the first and second mounting seats 31 and 32 are fixed to the bottom plate 1 and the top plate 2, respectively, by a welded connection structure.
Both ends of the bending beam 41 are provided with screw rods 411, and both ends of the bending beam 41 are fixedly connected with the first base 42 and the second base 43 through the screw rods 411.
The buckling beam 41 may be made of spring steel, and is fixedly connected to the first base 42 and the second base 43 through a bolt connection structure by screws 411 welded to both ends.
The upper surface of bottom plate 1 and the lower surface of roof 2 correspond respectively first base 42 and second base 43 are provided with support 44, the pivot is fixed set up in support 44, first base 42 and second base 43 correspond the pivot is provided with collar 45, collar 45 cover is located the pivot, just the inboard of collar 45 is fixed and is provided with rubber circle 451, the inboard of rubber circle 451 with the surface of pivot offsets.
Wherein, the end of the rotating shaft can be provided with a blocking structure which is a stop block to prevent the mounting ring 45 from separating from the rotating shaft; the rubber ring 451 is arranged between the rotating shaft and the mounting ring 45, so that the rotating shaft and the mounting ring 45 can generate relative displacement within a certain range to offset the mounting error of the elastic arm.
The bottom plate 1 with set up the second mounting hole that is used for installing support 44 on the roof 2, the second mounting hole runs through bottom plate 1 or roof 2 setting, support 44 corresponds the second mounting hole is provided with the second screw hole, support 44 pass through bolted connection structure install in the second mounting hole.
The second mounting hole may be a screw hole, and the bracket 44 is fixed to the bottom plate 1 and the top plate 2 by bolts simultaneously mounted to the second screw hole and the second mounting hole. In another embodiment, the second mounting holes are through holes, and the bracket 44 is mounted on the bottom plate 1 and the top plate 2 through a bolt-and-nut connection structure, wherein the upper end or the lower end of the first mounting hole 11 is provided with a widening hole for receiving a nut so as to keep the lower surface of the bottom plate 1 and the upper surface of the top plate 2 flush.
The second mounting hole includes a circular hole 121 and an elongated hole 122, and a center of the circular hole 121 is located on a center line of the elongated hole 122 in a length direction.
Wherein, the round hole 121 and the long hole 122 on the top plate 2 are arranged corresponding to the round hole 121 and the long hole 122 on the bottom plate 1, the brackets 44 are mounted on the round hole 121 and the long hole 122 on the top plate 2 and the bottom plate 1 through bolt structures, the bracket 44 mounted in the long hole 122 can move along the length direction of the long hole 122 in the long hole 122 so as to adjust the position of the bracket 44, two ends of one of the elastic arms in the negative stiffness mechanism are respectively pivoted on the bracket 44 in the round hole 121 on the top plate 2 and the bracket 44 in the long hole 122 on the bottom plate 1, two ends of the other elastic arm are respectively pivoted on the bracket 44 in the long hole 122 on the top plate 2 and the bracket 44 in the round hole 121 on the bottom plate 1, at this time, the two elastic arms are crossed without contacting with each other, and further, the length of the elastic arm can be adjusted through adjusting the position of the bracket 44 in the long hole 122 so as to adjust the compression amount of the, so that the vibration isolator can provide good vibration isolation performance under different loads.
And a limiting mechanism for limiting the moving stroke of the top plate 2 relative to the bottom plate 1 is further arranged between the bottom plate 1 and the top plate 2.
The limiting mechanism is used for limiting the maximum stroke of the top plate 2 relative to the bottom plate 1 so as to prevent the negative stiffness mechanism from being damaged due to the fact that the top plate 2 is excessively formed.
The limiting mechanism comprises a limiting rod 51 fixedly arranged on the bottom plate 1 and a limiting support 52 fixedly arranged on the top plate 2, a lantern ring 521 is arranged at the bottom end of the limiting support 52, the upper end of the limiting rod 51 penetrates through the lantern ring 521, a blocking portion 511 is arranged at the limiting top, and the width of the blocking portion is larger than the inner diameter of the lantern ring 521.
Be provided with the third mounting hole 13 that runs through bottom plate 1 on the bottom plate 1, third mounting hole 13 is the screw hole, the lower extreme of gag lever post 51 is provided with the screw thread corresponding to third mounting hole 13, and install in third mounting hole 13 through this screw thread, be provided with the fourth mounting hole that runs through bottom plate 1 on roof 2, the upper end of gag lever post 51 is provided with the screw thread corresponding to the fourth mounting hole, and install in the fourth mounting hole through this screw thread, wherein, the ascending removal of stopper portion 511 restriction fender ring, thereby the stroke of restriction roof 2 for bottom plate 1 upward movement, the stroke of roof 2 downward movement can be restricted at the top of gag lever post 51.
The blocking portion 511 is adjustably disposed on the limiting rod 51.
The upper part of the limiting rod 51 is provided with external threads, the blocking part 511 is a nut, and the blocking part 511 is installed on the upper part of the limiting rod 51, so that the position of the blocking part 511 can be adjustably arranged on the limiting rod 51, and the maximum stroke of the top plate 2 relative to the bottom plate 1 can be adjusted by adjusting the position of the blocking part 511 on the limiting rod 51.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a bucking roof beam quasi-zero rigidity isolator, including the bottom plate and with bottom plate parallel arrangement's roof, the bottom plate with be provided with between the roof and be connected the positive rigidity mechanism and the negative rigidity mechanism of bottom plate and roof, its characterized in that, negative rigidity mechanism includes two alternately arranged's elastic arm, elastic arm includes first base and second base, be provided with the roof of buckling of two relative settings between first base and the second base, the middle part of two roof of buckling outwards bends and sets up, the both ends of buckling the roof connect respectively in first base and second base, first base and second base through the pivot respectively the pin joint in the lower surface of roof and the upper surface of bottom plate.
2. The buckling beam quasi-zero stiffness vibration isolator according to claim 1, wherein the positive stiffness mechanism comprises a first mounting seat fixedly arranged on the upper surface of the bottom plate and a second mounting seat fixedly arranged on the lower surface of the top plate, a cylindrical spring is arranged between the first mounting seat and the second mounting seat, and the upper end and the lower end of the cylindrical spring are fixedly connected with the second mounting seat and the first mounting seat respectively.
3. The buckling beam quasi-zero stiffness vibration isolator according to claim 1, wherein first mounting holes for mounting a first mounting seat and a second mounting seat are formed in the bottom plate and the top plate, the first mounting holes are arranged through the bottom plate or the top plate, first threaded holes are formed in the first base and the second base corresponding to the first mounting holes, and the first mounting seat and the second mounting seat are mounted in the first mounting holes through a bolt connection structure.
4. The buckling beam quasi-zero stiffness vibration isolator as claimed in claim 1, wherein screws are arranged at two ends of the buckling beam, and the two ends of the buckling beam are fixedly connected with the first base and the second base through the screws.
5. The buckling beam quasi-zero stiffness vibration isolator as claimed in claim 1, wherein a bracket is disposed on the upper surface of the bottom plate and the lower surface of the top plate corresponding to the first base and the second base, respectively, the rotating shaft is fixedly disposed on the bracket, a mounting ring is disposed on the first base and the second base corresponding to the rotating shaft, the mounting ring is sleeved on the rotating shaft, a rubber ring is fixedly disposed on the inner side of the mounting ring, and the inner side of the rubber ring is abutted against the surface of the rotating shaft.
6. The buckling beam quasi-zero stiffness vibration isolator as claimed in claim 5, wherein a second mounting hole is formed in the bottom plate and the top plate for mounting a bracket, the second mounting hole is formed through the bottom plate or the top plate, a second threaded hole is formed in the bracket corresponding to the second mounting hole, and the bracket is mounted in the second mounting hole through a bolt connection structure.
7. The buckling beam quasi-zero stiffness vibration isolator of claim 6, wherein the second mounting hole comprises a round hole and a strip hole, and the center of the round hole is located on a center line of the length direction of the strip hole.
8. The buckling beam quasi-zero stiffness vibration isolator according to claim 1, wherein a limiting mechanism for limiting the moving stroke of the top plate relative to the bottom plate is further arranged between the bottom plate and the top plate.
9. The buckling beam quasi-zero stiffness vibration isolator according to claim 8, wherein the limiting mechanism comprises a limiting rod fixedly arranged on the bottom plate and a limiting bracket fixedly arranged on the top plate, a sleeve ring is arranged at the bottom end of the limiting bracket, the upper end of the limiting rod passes through the sleeve ring, a blocking part is arranged at the top of the limiting bracket, and the width of the blocking part is larger than the inner diameter of the sleeve ring.
10. The buckling beam quasi-zero stiffness vibration isolator of claim 9 wherein the stop is positionally adjustable on the limit post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020004436.9U CN211774735U (en) | 2020-01-02 | 2020-01-02 | Quasi-zero stiffness vibration isolator for bending beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020004436.9U CN211774735U (en) | 2020-01-02 | 2020-01-02 | Quasi-zero stiffness vibration isolator for bending beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211774735U true CN211774735U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020004436.9U Withdrawn - After Issue CN211774735U (en) | 2020-01-02 | 2020-01-02 | Quasi-zero stiffness vibration isolator for bending beam |
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| Country | Link |
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| CN (1) | CN211774735U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188424A (en) * | 2020-01-02 | 2020-05-22 | 湖南大学 | Quasi-zero stiffness vibration isolator for bending beam |
| CN115949688A (en) * | 2022-09-20 | 2023-04-11 | 深圳技术大学 | Vibration damping device for vibration and displacement control and design method thereof |
-
2020
- 2020-01-02 CN CN202020004436.9U patent/CN211774735U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188424A (en) * | 2020-01-02 | 2020-05-22 | 湖南大学 | Quasi-zero stiffness vibration isolator for bending beam |
| CN111188424B (en) * | 2020-01-02 | 2024-04-16 | 湖南大学 | Quasicont zero stiffness vibration isolator for bending beam |
| CN115949688A (en) * | 2022-09-20 | 2023-04-11 | 深圳技术大学 | Vibration damping device for vibration and displacement control and design method thereof |
| CN115949688B (en) * | 2022-09-20 | 2023-08-25 | 深圳技术大学 | Vibration and displacement controlled vibration damper and design method thereof |
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