CN204852123U - Zero accurate rigidity damping platform that can adjust in a flexible way - Google Patents
Zero accurate rigidity damping platform that can adjust in a flexible way Download PDFInfo
- Publication number
- CN204852123U CN204852123U CN201520540290.9U CN201520540290U CN204852123U CN 204852123 U CN204852123 U CN 204852123U CN 201520540290 U CN201520540290 U CN 201520540290U CN 204852123 U CN204852123 U CN 204852123U
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Abstract
The utility model discloses a zero accurate rigidity damping platform that can adjust in a flexible way, including allocating the platform, moving platform, damping assembly and thrust subassembly, damping assembly with allocate the platform and move the platform and is connected, the thrust subassembly sets up in allocating the bench, and is used for applying thrust to moving the platform, the thrust subassembly is equipped with a plurality ofly on every side moving the platform. The utility model discloses a damping platform can realize this damping platform in accurate zero rigidity of its equipoise and near the non -linear rigidity in equipoise, the intrinsic contradictions that restrict traditional vibration isolation system can be solved to a difficult problem in the time of solving traditional linear vibration isolation system isolation low frequency or super low frequency vibration, can also solve the difficult problem between low frequency vibration transport and the high -frequency vibration attenuation rate.
Description
Technical field
The utility model belongs to the technical field of mechanical engineering field, relates to the vibration damping in mechanical engineering, vibration isolation technique, particularly relates to a kind of vibration reduction platform with accurate zero stiffness.
Background technique
According to vibrational theory, traditional initial isolation frequency of passive vibration isolation system is system self natural frequency
doubly.Realize the low frequency within the scope of 0.5 ~ 70Hz, ultralow frequency and wide frequency domain vibration isolation if want, the natural frequency of system self can only be reduced, but system frequency is relevant to rigidity, reduce natural frequency and will reduce system stiffness.System stiffness is low by causing the distortion of elastic element to increase, and causes system bearing ability to die down, occurs new contradiction.Meanwhile, due to the needs of production development and scientific experiment, the requirement that precision mechanical system is disturbed constrained vibration is more and more higher, in order to promote precision, can only add large rigidity, but rigidity increases, and system frequency also increases, and is unfavorable for being less than
vibration isolation within the scope of times system frequency.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.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.Find along with to vibrating isolation system further investigation, accurate zero stiffness vibrating isolation system has high quiet low dynamic good characteristic, while feasible system natural frequency is lower, has large rigidity (large bearing capacity).
Model utility content
The one that provides the utility model has both higher static stiffness and lower dynamic rate, and can realize accurate zero stiffness characteristic and the accurate zero stiffness vibration reduction platform of the adjustable wide frequency domain vibration isolation of accurate zero stiffness.。
To achieve these goals, the technological scheme that the utility model is taked is: a kind of can the accurate zero stiffness vibration reduction platform of free adjusting, comprising:
Fixed platform;
Moving platform;
Damping assembly, it is connected with fixed platform and moving platform; And
Thrust assemblies, it is arranged on fixed platform, and for moving platform applied thrust; Thrust assemblies is provided with multiple around moving platform.
Lower end and the described fixed platform of described damping assembly are rotationally connected, and upper end is inserted described moving platform inside and is connected with moving platform.
Described damping assembly comprises vibration damper, shock-absorbing spring, the lower spring cup that is arranged at the upper spring seat on the piston rod of vibration damper and is arranged on the cylinder body of vibration damper, and shock-absorbing spring to be sheathed on vibration damper and between upper spring seat and lower spring cup.
Cylinder body lower end and the described fixed platform of described vibration damper are rotationally connected, and described upper spring seat is fixedly connected with described moving platform.
The inside center of described moving platform has the center hole holding described damping assembly, and described upper spring seat is fixedly connected with moving platform in center hole.
Described thrust assemblies comprises the thrust assemblies seat be arranged on described fixed platform and the push rod be movably arranged on thrust assemblies seat.
Described thrust assemblies seat is the structure of both ends open, inner hollow, described thrust assemblies also comprise be arranged at thrust spring in thrust assemblies seat inner chamber and to insert in thrust assemblies seat and with the adjusting screw of thrust assemblies seat for being threaded, described push rod inserts in thrust assemblies seat, and thrust spring is between push rod and adjusting screw.
The inner spring seat laid respectively between described thrust spring and described adjusting screw, between described thrust spring and described push rod is also provided with in the inner chamber of described thrust assemblies seat.
Described push rod one end is inserted in described thrust assemblies seat, and the other end is provided with the roller contacted with described moving platform.
The outer surface of described moving platform has the arc shaped surface contacted with described thrust assemblies.
The beneficial effect that vibration reduction platform of the present utility model has is:
1, by arranging rational structural parameter, the non-linear rigidity of this vibration reduction platform near the accurate zero stiffness and equipoise of its equipoise can be realized, difficult problem when conventional linear vibrating isolation system isolation low frequency or superlow frequency vibrating can be solved;
2, (as the 1mm even amplitude of 0.1mm) during micro breadth oscillation, adopt in prior art tilting spring quasi-zero stiffness vibration isolators due to tilting spring pivot angle too little, negative rigidity mechanism not yet can work, and causes the vibration isolating effect not reaching expection.And vibration reduction platform of the present utility model adopts spin mechanism to replace tilting spring, when producing micro breadth oscillation, negative rigidity mechanism just can get involved immediately, thus ensure that the effective vibration isolation to micro breadth oscillation.
3, shock-absorbing spring is convenient to change, and namely system stiffness can easyly regulate, and is applicable to the vibration isolation of different quality object, has good engineering adaptability;
4, this vibration reduction platform has high quiet low dynamic good characteristic, can solve the intrinsic contradictions restricting traditional vibrating isolation system, can also solve the difficult problem between low-frequency vibration transmissibility and dither decrement.
Accompanying drawing explanation
This specification comprises the following drawings, shown content respectively:
Fig. 1 is the structural representation of the utility model vibration reduction platform;
Fig. 2 is the structural representation of fixed platform;
Fig. 3 is the structural representation of thrust assemblies;
Fig. 4 is the sectional view of thrust assemblies;
Fig. 5 is the structural representation of damping assembly;
Fig. 6 is 1/4 sectional view of moving platform;
Fig. 7 is 1/4 sectional view of mounting plate;
Be labeled as in figure:
1, base; 2, strut; 3, bearing; 4, bolt; 5, thrust assemblies seat; 6, moving platform; 7, bolt; 8, upper spring seat; 9, shock-absorbing spring; 10, adjusting screw; 11, lower spring cup; 12, regulating ring; 13, outside thread; 14, mounting hole; 15, bolt; 16, disc; 17, hinge base; 18, tapped hole; 19, scaffold; 20, roller; 21, roller shaft; 22, inner spring seat; 23, thrust spring; 24, inner spring seat; 25, mounting hole; 26, nut; 27, vibration damper; 28, surface of contact; 29, center hole; 30, counterbore; 31, tapped hole; 32, tapped hole; 33, mounting plate; 34, counterbore; 35, T-slot; 36, hexagon socket head cap screw; 37, push rod.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, be described in further detail embodiment of the present utility model, object helps those skilled in the art to have more complete, accurate and deep understanding to design of the present utility model, technological scheme, and contribute to its enforcement.
As shown in Figures 1 to 7, the utility model provide a kind of can the accurate zero stiffness vibration reduction platform of free adjusting, comprise fixed platform, moving platform 6, damping assembly and thrust assemblies.Damping assembly is connected with fixed platform and moving platform 6, and thrust assemblies is arranged on fixed platform, and thrust assemblies is used for moving platform 6 applied thrust, and thrust assemblies is provided with multiple around moving platform 6.
Specifically, moving platform 6 is can vertically move relative to fixed platform, and moving platform 6 is for carrying vibration isolation object.As depicted in figs. 1 and 2, the strut 2 that fixed platform comprises base 1, the disc 16 be connected with base 1 and is connected with disc 16, the lower end of damping assembly is connected with base 1 in the center of base 1, and disc 16 and strut 2 are furnished with multiple around base 1.Strut 2 is for installed thrust assembly, and in the present embodiment, strut 2 is the U-shaped structure of opening towards thrust assemblies.Disc 16, for connecting strut 2 and base 1, forms the fixed platform of integrative-structure.When disc 16 is extended in the horizontal direction, the lower end of strut 2 is connected with the end winding support of disc 16, and the other end of disc 16 is fixedly connected with base 1, and thrust assemblies is fixedly connected with the upper end of strut 2.
As shown in Figure 1, the lower end of damping assembly and the base 1 of fixed platform are rotationally connected, and upper end is inserted moving platform 6 inside and is connected with moving platform 6.As shown in Figure 6, the inside center of moving platform 6 has the center hole 29 holding damping assembly, center hole 29 is circular hole, and when moving platform 6 and damping assembly are vertical state above base 1, the axis of the center line of base 1 and the center hole 29 of moving platform 6 is positioned at same straight line.
As shown in Figure 6, the center hole 29 in moving platform 6 extends to the bottom surface of moving platform 6, forms the opening allowing damping assembly pass in bottom surface.Be provided with a circular counterbore 30 at the end face of moving platform 6, counterbore 30 is communicated with center hole 29 and both are coaxial.
As shown in Figure 1 and Figure 5, damping assembly comprises vibration damper 27, shock-absorbing spring 9, the lower spring cup 11 that is arranged at the upper spring seat 8 on the piston rod of vibration damper 27 and is arranged on the cylinder body of vibration damper 27, shock-absorbing spring 9 is sheathed on vibration damper 27 and between upper spring seat 8 and lower spring cup 11, upper spring seat 8 and lower spring cup 11 clamp shock-absorbing spring 9.The structure of vibration damper 27 as well known in the skilled person, does not repeat them here.The piston rod of vibration damper 27 through upper spring seat 8, and piston rod is provided with nut 26 and realizes being fixedly connected with of piston rod and upper spring seat 8.Upper spring seat 8 is also arranged in the counterbore 30 at moving platform 6 top, upper spring seat 8 is fixedly connected with moving platform 6 by bolt 7, correspondingly on upper spring seat 8 be provided with the mounting hole 25 allowing bolt 7 pass, correspondingly in moving platform 6 be provided with the tapped hole 31 coordinated with bolt 7, upper spring seat 8 is also coaxial with the center hole 29 of moving platform 6.Lower spring cup 11 is sheathed on the cylinder body of vibration damper 27, and is axially movable along vibration damper 27.As preferably, damping assembly also comprise be sheathed on vibration damper 27 cylinder body on and be the regulating ring 12 be threaded with cylinder body, the outer surface of the corresponding cylinder body at vibration damper 27 is provided with outside thread 13, and the inwall of regulating ring 12 is provided with the internal thread coordinated with outside thread.Regulating ring 12 is positioned at the below of moving platform 6, lower spring cup 11 is clipped between regulating ring 12 and shock-absorbing spring 9, by rotating the regulating ring 12 on cylinder body, lower spring cup 11 can be made to rise or decline, regulate the distance between lower spring cup 11 and upper spring seat 8, also namely can regulate the elastic force of shock-absorbing spring 9.Shock-absorbing spring 9 is preferably cylindrically coiled spring, and is Compress Spring.
As shown in Figure 1, the cylinder body of vibration damper 27 is provided with the hinge base 17 be rotationally connected with the base 1 of fixed platform, hinge base 17 is rotationally connected by bolt 15 and the bearing set by base 1 end face, and bolt 15, as bearing pin, is correspondingly provided with the mounting hole 14 allowing bolt 15 pass on hinge base 17; The axis of mounting hole 14 and the axis of vibration damper 27 perpendicular.
As shown in Figure 1 and Figure 4, thrust assemblies comprises the thrust assemblies seat 5 be arranged on the strut 2 of fixed platform and the push rod 37 be movably arranged on thrust assemblies seat 5.Thrust assemblies seat 5 is the structure of both ends open, inner hollow, thrust assemblies also comprise thrust spring 23 in the inner chamber being arranged at thrust assemblies seat 5 and at one end to insert in thrust assemblies seat 5 and with the adjusting screw 10 of thrust assemblies seat 5 for being threaded, push rod 37 to insert in thrust assemblies seat 5 and stretches out from thrust assemblies seat 5 the other end outward opening, and thrust spring 23 is between push rod 37 and adjusting screw 10.Thrust spring 23 is Compress Spring, for applying the thrust of outwards movement to push rod 37.
As preferably, as shown in Figure 1 and Figure 4, one end of push rod 37 is inserted in thrust assemblies seat 5, and the other end is provided with the scaffold 19 for installing roller 20, and roller 20 is installed on scaffold 19 by roller shaft 21.Roller 20 is cylindrical structural, and roller 20 is between thrust assemblies seat 5 and moving platform 6, and roller 20 is for contacting with moving platform 6 outer surface.Roller 20 is rotating on scaffold 19, the axis perpendicular of the axis of roller shaft 21 and the round cavity of thrust assemblies seat 5.
As shown in Figure 4, the inner spring seat 22 between thrust spring 23 and adjusting screw 10 and the inner spring seat 24 between thrust spring 23 and push rod 37 is also provided with in the inner chamber of thrust assemblies seat 5.Adjusting screw 10 part is inserted in thrust assemblies seat 5 and is threaded with it, and another part is positioned at outside thrust assemblies seat 5.By rotating adjusting screw 10, inner spring seat 22 can be made to move vertically in thrust assemblies seat 5, regulating the distance between inner spring seat 22 and inner spring seat 24, also namely can regulate the elastic force of thrust spring 23.Thrust spring 23 is preferably cylindrically coiled spring, and is Compress Spring.
As shown in Figure 1, thrust assemblies seat 5 is arranged on a strut 2 respectively, and the axis of thrust assemblies seat 5 also parallels with the length direction of the disc 16 of below.The sidewall of thrust assemblies seat 5 is provided with two bearings, 3, two bearings 3 and is fixedly connected with by the vertical bar of bolt 4 with the upper end open both sides of strut 2, realizes being fixedly connected with of thrust assemblies and fixed platform.
As shown in figures 1 to 6, moving platform 6 is square structure, and center hole 29 is positioned at the inside center place of moving platform 6.Thrust assemblies is furnished with four around moving platform 6, and four thrust assemblies are uniformly distributed circumferentially centered by the center line of base 1.Moving platform 6 has end face, bottom surface and four surface of contact 28 between end face and bottom surface, and each thrust assemblies lays respectively at the outside of a surface of contact 28, and the roller 20 of thrust assemblies contacts with surface of contact 28.As preferably, surface of contact 28 be towards moving platform 6 internal recess at the bottom of arc for arc shaped surface, the axis of surface of contact 28 parallels with the axis of roller 20, and all spatially perpendicular with the center line of base 1, the axis of surface of contact 28 is also spatially perpendicular with the axis of the center hole 29 in moving platform 6.
As shown in Figure 1, vibration reduction platform of the present utility model also comprises the mounting plate 33 on the end face being fixed on moving platform 6, and mounting plate 33 is for installing by vibration isolation object.In the present embodiment, as shown in Figure 7, the end face of mounting plate 33 is provided with T-slot, and is provided with six counterbores 34, T-slot is used for by the installation of vibration isolation object, and mounting plate 33 is fixed on moving platform 6 by hexagon socket head cap screw 36 by six counterbores 34.The number of T-slot is arranged as required, can arrange many, and in the present embodiment, T-slot is provided with six that parallel altogether.
Below by reference to the accompanying drawings the utility model is exemplarily described.Obviously, the utility model specific implementation is not subject to the restrictions described above.As long as have employed the improvement of the various unsubstantialities that method of the present utility model is conceived and technological scheme is carried out; Or without improvement, above-mentioned design of the present utility model and technological scheme directly applied to other occasion, all within protection domain of the present utility model.
Claims (10)
1. can the accurate zero stiffness vibration reduction platform of free adjusting, it is characterized in that, comprising:
Fixed platform;
Moving platform;
Damping assembly, it is connected with fixed platform and moving platform; And
Thrust assemblies, it is arranged on fixed platform, and for moving platform applied thrust; Thrust assemblies is provided with multiple around moving platform.
2. according to claim 1 can the accurate zero stiffness vibration reduction platform of free adjusting, it is characterized in that, lower end and the described fixed platform of described damping assembly are rotationally connected, and it is inner and be connected with moving platform that described moving platform is inserted in upper end.
3. according to claim 1 and 2 can the accurate zero stiffness vibration reduction platform of free adjusting, it is characterized in that, described damping assembly comprises vibration damper, shock-absorbing spring, the lower spring cup that is arranged at the upper spring seat on the piston rod of vibration damper and is arranged on the cylinder body of vibration damper, and shock-absorbing spring to be sheathed on vibration damper and between upper spring seat and lower spring cup.
4. according to claim 3 can the accurate zero stiffness vibration reduction platform of free adjusting, it is characterized in that, cylinder body lower end and the described fixed platform of described vibration damper are rotationally connected, and described upper spring seat is fixedly connected with described moving platform.
5. according to claim 4 can the accurate zero stiffness vibration reduction platform of free adjusting, it is characterized in that, the inside center of described moving platform has the center hole holding described damping assembly, and described upper spring seat is fixedly connected with moving platform in center hole.
6. according to claim 5 can the accurate zero stiffness vibration reduction platform of free adjusting, it is characterized in that, described thrust assemblies comprises the thrust assemblies seat be arranged on described fixed platform and the push rod be movably arranged on thrust assemblies seat.
7. according to claim 6 can the accurate zero stiffness vibration reduction platform of free adjusting, it is characterized in that, described thrust assemblies seat is the structure of both ends open, inner hollow, described thrust assemblies also comprise be arranged at thrust spring in thrust assemblies seat inner chamber and to insert in thrust assemblies seat and with the adjusting screw of thrust assemblies seat for being threaded, described push rod inserts in thrust assemblies seat, and thrust spring is between push rod and adjusting screw.
8. according to claim 7 can the accurate zero stiffness vibration reduction platform of free adjusting, it is characterized in that, in the inner chamber of described thrust assemblies seat, be also provided with the inner spring seat laid respectively between described thrust spring and described adjusting screw, between described thrust spring and described push rod.
9. according to claim 8 can the accurate zero stiffness vibration reduction platform of free adjusting, it is characterized in that, described push rod one end is inserted in described thrust assemblies seat, and the other end is provided with the roller contacted with described moving platform.
10. according to claim 9 can the accurate zero stiffness vibration reduction platform of free adjusting, it is characterized in that, the outer surface of described moving platform has the arc shaped surface contacted with described thrust assemblies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520540290.9U CN204852123U (en) | 2015-07-22 | 2015-07-22 | Zero accurate rigidity damping platform that can adjust in a flexible way |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520540290.9U CN204852123U (en) | 2015-07-22 | 2015-07-22 | Zero accurate rigidity damping platform that can adjust in a flexible way |
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| Publication Number | Publication Date |
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| CN204852123U true CN204852123U (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520540290.9U Expired - Fee Related CN204852123U (en) | 2015-07-22 | 2015-07-22 | Zero accurate rigidity damping platform that can adjust in a flexible way |
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| CN (1) | CN204852123U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065526A (en) * | 2015-07-22 | 2015-11-18 | 安徽工程大学 | Flexibly adjustable quasi-zero rigidity vibration attenuation platform |
| CN108458034A (en) * | 2018-03-20 | 2018-08-28 | 华中科技大学 | Adjustable loaded metal Zero-rigidity vibration isolator |
| CN109505918A (en) * | 2018-12-27 | 2019-03-22 | 哈尔滨工业大学 | A kind of quasi-zero stiffness vibration isolators based on translot spring |
| CN113503335A (en) * | 2021-08-23 | 2021-10-15 | 北京理工大学 | Packaged constant-quasi-zero-stiffness vibration isolator |
| CN113503336A (en) * | 2021-08-23 | 2021-10-15 | 北京理工大学 | Constant-quasi-zero-stiffness vibration isolator |
-
2015
- 2015-07-22 CN CN201520540290.9U patent/CN204852123U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065526A (en) * | 2015-07-22 | 2015-11-18 | 安徽工程大学 | Flexibly adjustable quasi-zero rigidity vibration attenuation platform |
| CN105065526B (en) * | 2015-07-22 | 2017-04-19 | 安徽工程大学 | Flexibly adjustable quasi-zero rigidity vibration attenuation platform |
| CN108458034A (en) * | 2018-03-20 | 2018-08-28 | 华中科技大学 | Adjustable loaded metal Zero-rigidity vibration isolator |
| CN108458034B (en) * | 2018-03-20 | 2024-04-19 | 华中科技大学 | Load-adjustable metal zero-stiffness vibration isolator |
| CN109505918A (en) * | 2018-12-27 | 2019-03-22 | 哈尔滨工业大学 | A kind of quasi-zero stiffness vibration isolators based on translot spring |
| CN113503335A (en) * | 2021-08-23 | 2021-10-15 | 北京理工大学 | Packaged constant-quasi-zero-stiffness vibration isolator |
| CN113503336A (en) * | 2021-08-23 | 2021-10-15 | 北京理工大学 | Constant-quasi-zero-stiffness vibration isolator |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 Termination date: 20170722 |
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| CF01 | Termination of patent right due to non-payment of annual fee |