Independent three-line pendulum air flotation vibration isolation platform

Abstract

The utility model discloses an independent three-line pendulum air flotation vibration isolation platform which comprises a platform body and a supporting column, a supporting rod is arranged at the top of the supporting column, a supporting disc is arranged at the top of the supporting rod, a three-line pendulum device is arranged at the upper end in the supporting column, and an air flotation device is further arranged at the top of the supporting column. The three-line pendulum device and the supporting rod are controlled by the air flotation device to move up and down for adjustment, a lever control valve is arranged on the outer side of the supporting column, and an air inlet of the lever control valve is connected with an air pump through a pipeline. The three-line pendulum device and the air floatation air supply device are arranged in the supporting column, the three-line pendulum device can isolate low-frequency vibration, the three-line pendulum device and the air floatation air supply device are matched so that the vibration isolation platform can achieve vibration isolation operation in a wide frequency range, and therefore the vibration isolation effect of the vibration isolation platform is greatly improved, and the service life of the vibration isolation platform is prolonged. And the vibration isolation platform can adapt to more experimental instruments so as to meet different vibration isolation requirements.

Description

Technical Field

[0001] This utility model relates to the field of vibration isolation platform technology, specifically to an independent three-line pendulum air-float vibration isolation platform. Background Technology

[0002] Vibration isolation platforms are devices that provide vibration isolation for precision instruments used in laboratories and engineering fields. A commonly used vibration isolation platform typically consists of a rectangular platform with support legs at each of its lower corners. Gas springs are mounted on top of the support legs, and the platform is mounted on a mounting plate on top of the gas springs. Lever control valves are also installed on the support legs. When equipment is placed on the platform, its weight presses down on the platform. When the platform contacts the lever control valve, it is activated. At this time, an air pump fills the gas springs at the lower positions with air, which then lifts the platform and keeps it level. During equipment operation, the gas spring device also provides vibration damping. While the gas springs primarily isolate mid-to-high frequency vibrations, their vibration isolation effect is poor for low-frequency vibrations, indicating a certain limitation in their use. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an independent three-line pendulum air-bearing vibration isolation platform to solve the aforementioned technical problems.

[0004] The present invention adopts the following technical solution: an independent three-line pendulum air-float vibration isolation platform, comprising a platform body and support columns disposed at each end corner of the bottom of the platform body. A support rod is disposed at the top of the support column, the top end of the support rod extending upwards towards the upper end of the support column, and a support plate is disposed at the top of the support rod. A cavity is disposed at the upper end of the support column, and a three-line pendulum device is disposed in the cavity. The support rod is mounted on the three-line pendulum device. An air-float device is also disposed at the top of the support column. The three-line pendulum device and the support rod move up and down under the control of the air-float device. A lever control valve is disposed on the outside of the support column. The air inlet of the lever control valve is connected to an air pump through a pipeline, and the air outlet of the lever control valve is connected to an air inlet connector on the side wall of the support column through a pipeline. The lever control valve is used to control the air pump to supply air to the air-float device.

[0005] Furthermore, the support column has an open structure at the upper end of its cavity, and a mounting cylinder with a top opening is provided at the position corresponding to the upper port edge of the cavity. The three-line pendulum device is located in the cavity of the mounting cylinder. The mounting cylinder has several vent holes evenly distributed on its bottom wall, and a mesh for air passage is provided at the vent holes. The air inlet connector is located at the lower end of the mounting cylinder and communicates with the cavity. The air flotation device is located above the top opening of the mounting cylinder.

[0006] Furthermore, the three-line pendulum device includes a hollow cylinder seat disposed in the cavity of the mounting cylinder. The top plate of the cylinder seat is provided with a perforation, and there is a ventilation gap between the cylinder seat and the mounting cylinder. Three pendulum lines are symmetrically arranged on the top plate inside the cylinder seat at positions corresponding to the perforation around the perforation. Each pendulum line is provided with a horizontal lower pendulum plate at its lower end. The lower end of the support rod is fixedly installed on the lower pendulum plate, and the upper end of the support rod passes through the perforation of the cylinder seat and extends outward from the support column.

[0007] Furthermore, a retaining edge is provided on the support rod at the position corresponding to the through hole of the cylinder seat. The cross-section of the retaining edge is a trapezoidal structure that is narrower at the top and wider at the bottom. The diameter of the upper edge of the retaining edge is smaller than the diameter of the through hole of the cylinder seat, and the diameter of the lower edge of the retaining edge is larger than the diameter of the through hole of the cylinder seat. The upper end of the retaining edge is located inside the through hole of the cylinder seat, and the lower end of the retaining edge is located inside the cylinder seat.

[0008] Furthermore, an upwardly protruding support pad ring is provided on the bottom wall of the mounting cylinder at a position corresponding to the outer periphery of the mesh, and the lower end of the cylinder seat rests on the support pad ring.

[0009] Furthermore, the air flotation device includes an annular floating rubber sheet. The diameter of the inner hole of the floating rubber sheet is larger than the diameter of the through hole in the cylinder seat. The inner edge of the floating rubber sheet rests on the top plate of the cylinder seat, and the outer edge of the floating rubber sheet rests on the edge of the opening at the top of the support column. An annular pressure plate is provided above the inner edge of the floating rubber sheet. The inner hole of the pressure plate corresponds to the position of the through hole in the cylinder seat. The pressure plate is fixedly connected to the top plate of the cylinder seat and seals and compacts the inner edge of the floating rubber sheet. The floating rubber sheet rests on the outer edge of the... The device is equipped with an annular cover plate, the middle of which is raised. There is a floating cavity between the cover plate and the pressure plate to facilitate the inflation of the floating rubber. The cover plate is fixedly connected to the top edge of the support column and seals and presses the outer edge of the floating rubber. The floating rubber blocks the upper end of the air gap in the installation cylinder. The pressure plate and the cover plate cooperate to press the inner and outer edges of the floating rubber to form a gas spring. The top of the support rod passes through the floating rubber, the pressure plate and the inner hole in the middle of the cover plate in sequence. The support plate is located on the outside of the cover plate.

[0010] Furthermore, the floating rubber sheet has a downwardly protruding sealing head at the position corresponding to its inner hole and the bottom of its outer edge. The sealing head has a notch in the middle, and the two sides of the notch are arc-shaped. The notch makes the sealing head form two symmetrical fan-shaped parts. The fan-shaped parts have holes. The top plate of the cylinder seat and the top edge of the support column are respectively provided with sealing grooves to facilitate the insertion of the sealing head. The bottom of the sealing groove is provided with an upwardly protruding abutment block. The abutment block is adapted to the shape of the notch, and the two symmetrical fan-shaped parts are respectively inserted on both sides of the abutment block.

[0011] The above-mentioned technical solution of this utility model has the following beneficial effects: By setting a three-wire pendulum device and an air flotation air supply device in the support column, the three-wire pendulum device can isolate low-frequency vibration. The two work together to enable the vibration isolation platform to achieve vibration isolation operation in a wider frequency range, thereby greatly improving the vibration isolation effect of the vibration isolation platform. In addition, this vibration isolation platform can be adapted to more experimental instruments to meet different vibration isolation needs. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the main structure of the support column in an embodiment of this utility model;

[0015] Figure 3 This is a schematic diagram of the main structure of the three-line pendulum device according to Embodiment 3 of this utility model;

[0016] Figure 4 This is a schematic cross-sectional view of the top of the support column in an embodiment of the present invention;

[0017] Figure 5 for Figure 4 Enlarged view of point A in the middle. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0020] like Figure 1-5As shown, this utility model embodiment provides an independent three-wire pendulum air-float vibration isolation platform, including a platform body 1 and support columns 2 set at each end corner of the bottom of the platform body. A support rod 3 is set at the top of the support column 2, and the top end of the support rod 3 extends towards the upper end of the support column 2. A support plate 4 is set at the top of the support rod 3. The platform body 1 is mounted on the support plate 4. A cavity 5 is set at the upper end of the support column 2. A three-wire pendulum device is set in the cavity 5. The support rod 3 is mounted on the three-wire pendulum device. An air-float device is also set at the top of the support column 2. The three-wire pendulum device and the support rod 3 move up and down under the control of the air-float device. A lever control valve 6 is set on the outside of the support column 2. The air inlet of the lever control valve 6 is connected to an air pump through a pipeline. The air outlet of the lever control valve 6 is connected to an air inlet connector 15 on the side wall of the support column 2 through a pipeline. The lever control valve 6 is used to control the air pump to supply air to the air-float device.

[0021] The support column 2 has an open structure at the upper end of its cavity. Inside the cavity 5, there is a mounting cylinder 7 with a top opening at the position corresponding to the upper port edge of the cavity 5. The three-line pendulum device is set in the cavity of the mounting cylinder 7. The mounting cylinder 7 has several vent holes evenly distributed on its bottom wall. A mesh 8 that allows air to pass through is set at the vent holes. The air inlet connector 15 is located at the lower end of the mounting cylinder 7 and is connected to the cavity 5. The air flotation device is set above the top opening of the mounting cylinder 7.

[0022] The three-line pendulum device includes a hollow cylindrical seat 9 disposed in the cavity of the mounting cylinder 7. The top plate of the cylindrical seat 9 is provided with a perforation. There is a ventilation gap 10 between the cylindrical seat 9 and the mounting cylinder 7. Three pendulum lines 11 are symmetrically arranged on the top plate inside the cylindrical seat 9 at positions corresponding to the perforation around the perforation. Each pendulum line 11 has a horizontal lower pendulum plate 12 at its lower end. The lower end of the support rod 3 is fixedly installed on the lower pendulum plate 12. The upper end of the support rod 3 passes through the perforation of the cylindrical seat 9 and extends outward from the support column 2.

[0023] A retaining edge 13 is provided on the support rod 3 at the position corresponding to the through hole of the cylinder seat 9. The cross-section of the retaining edge 13 is a trapezoidal structure that is narrower at the top and wider at the bottom. The diameter of the upper edge of the retaining edge 13 is smaller than the diameter of the through hole of the cylinder seat 9, and the diameter of the lower edge of the retaining edge is larger than the diameter of the through hole of the cylinder seat 9. The upper end of the retaining edge is located inside the through hole of the cylinder seat 9, and the lower end of the retaining edge 13 is located inside the cylinder seat 9.

[0024] The retaining edge 13 can serve as a limit. The diameter of the support rod 3 is smaller than the diameter of the through hole. Thus, the support rod 3 can swing at the through hole. The cycloid 11 and the lower cycloid plate 12 are suspended inside the cylinder seat 2, so that the support rod 3 is suspended inside the cylinder seat 9.

[0025] On the bottom wall inside the mounting cylinder 7, a support pad ring 14 that protrudes upward is provided at the position corresponding to the outer periphery of the mesh 8, and the lower end of the cylinder seat 6 rests on the support pad ring 14.

[0026] The air flotation device includes an annular floating rubber sheet 16. The diameter of the inner hole of the floating rubber sheet 16 is larger than the diameter of the through hole in the cylinder seat 9. The inner edge of the floating rubber sheet 16 rests on the top plate of the cylinder seat 9, and the outer edge of the floating rubber sheet 16 rests on the edge of the opening at the top of the support column 2. An annular pressure plate 17 is provided above the inner edge of the floating rubber sheet 16. The inner hole of the pressure plate 17 corresponds to the position of the through hole in the cylinder seat 9. The pressure plate 17 is fixedly connected to the top plate of the cylinder seat 9 and seals and presses the inner edge of the floating rubber sheet 16. An annular cover plate 18 is provided above the outer edge of the floating rubber sheet 16. The middle part of the cover plate 18 is raised. There is a floating cavity between the cover plate 18 and the pressure plate 17 to facilitate the inflation of the floating rubber 16. The cover plate 18 is fixedly connected to the top edge of the support column 2 and seals and presses the outer edge of the floating rubber 16. The floating rubber 16 is sealed at the upper end of the air gap 10 in the mounting cylinder 7. The pressure plate 17 and the cover plate 18 cooperate to press the inner and outer edges of the floating rubber 16 to form a gas spring. The top of the support rod 3 passes through the floating rubber 16, the pressure plate 17 and the inner hole in the middle of the cover plate 18 in sequence. The support plate 4 is located on the outside of the cover plate 18.

[0027] The floating rubber sheet 16 has a downwardly protruding sealing head 19 at the position corresponding to its inner hole and the bottom of its outer edge. The sealing head 19 has a notch 20 in the middle, and the two sides of the notch 20 are arc-shaped. The notch 20 makes the sealing head 19 form two symmetrical fan-shaped parts. The fan-shaped parts are provided with holes 21. The top plate of the cylinder seat 9 and the top edge of the support column 2 are respectively provided with sealing grooves to facilitate the insertion of the sealing head 19. The bottom of the sealing groove is provided with an upwardly protruding pressing block 22. The pressing block 22 is adapted to the shape of the notch 20. The two symmetrical fan-shaped parts are respectively inserted into the two sides of the pressing block 22. The pressing block 22 will squeeze the fan-shaped parts of the train, thereby deforming them and firmly inserting them into the sealing groove.

[0028] The working principle of this utility model is as follows: The three-line pendulum device is suspended inside the cylinder base 9. Air is pumped into the air inlet 15 on the support column 2 through an air pump and pipeline. At this time, the air fills the cavity inside the mounting cylinder 7 through the mesh 8 at the bottom of the mounting cylinder 7. The injected air will cause the floating rubber 16 to expand and bulge to a certain height. Since the upper end of the cylinder base 9 is fixedly connected to the inner edge of the floating rubber 16, the inflated floating rubber 16 will lift the entire cylinder base 9 on the support pad ring 14. The platform body 1 is placed on the support plate 4 on the support column 3. The inflated air spring keeps the entire platform body 1 in a horizontal state, while the cylinder base 9 is suspended in each support column 2. The support column 3 can swing slightly on the lower pendulum plate 12. When the equipment is placed on the platform body 1, the weight of the equipment will press down on the platform body 1 at the corresponding position. The pressure of the platform body 1 causes the cycloidal lines 11 inside the support column 2 to be taut. The lower cycloidal plate 12 and the support column 3 above it can swing horizontally to a certain extent with the vibration of the equipment during operation, thereby isolating the vibration generated by the operation of the equipment. When the platform body 1 is pressed down too much, its bottom surface will contact the sensing rod of the lever control valve 6 on the corresponding support column 2. The pressing sensing rod of the platform body 1 causes the lever control valve 6 to be activated. At this time, the air pump continues to pump air into the support column 2 on the sinking side. With the replenishment of air, the sinking air spring will continue to float up, thereby lifting the platform body 1 and separating it from the corresponding lever control valve 6. In this way, the platform body 1 can be kept in a horizontal state. When the equipment is running, it will generate vibration. The air spring formed by the floating rubber 16 and the three-line cycloidal device suspended in the cylinder seat 9 will isolate the vibration at each frequency, thereby achieving the function of vibration isolation.

[0029] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An independent three-line pendulum air-bearing vibration isolation platform, characterized in that: The system includes a platform body and support columns located at each corner of the bottom of the platform body. Each support column has a support rod at its top, with the top end of the support rod extending upwards towards the upper end of the support column. A support plate is located at the top of the support rod. A cavity is located at the upper end of the support column, and a three-wire pendulum device is installed within the cavity. The support rod is mounted on the three-wire pendulum device. An air flotation device is also located at the top of the support column. The three-wire pendulum device and the support rod move up and down under the control of the air flotation device. A lever control valve is located on the outside of the support column. The air inlet of the lever control valve is connected to an air pump via a pipeline, and the air outlet of the lever control valve is connected to an air inlet connector on the side wall of the support column via a pipeline. The lever control valve is used to control the air pump to supply air to the air flotation device.

2. The independent three-line pendulum air-bearing vibration isolation platform according to claim 1, characterized in that: The support column has an open structure at the upper end of its cavity. Inside the cavity, there is a mounting cylinder with a top opening at the position corresponding to the upper port edge of the cavity. The three-line pendulum device is located in the cavity of the mounting cylinder. The mounting cylinder has several vent holes evenly distributed on its bottom wall. A mesh that allows air to pass through is provided at the vent holes. The air inlet connector is located at the lower end of the mounting cylinder and communicates with the cavity. The air flotation device is located above the top opening of the mounting cylinder.

3. The independent three-line pendulum air-bearing vibration isolation platform according to claim 2, characterized in that: The three-line pendulum device includes a hollow cylindrical base disposed in the cavity of the mounting cylinder. The top plate of the cylindrical base is provided with a perforation. There is a ventilation gap between the cylindrical base and the mounting cylinder. Three pendulum lines are symmetrically arranged on the top plate inside the cylindrical base at positions corresponding to the perforation around the perforation. Each pendulum line is provided with a horizontal lower pendulum plate at its lower end. The lower end of the support rod is fixedly installed on the lower pendulum plate, and the upper end of the support rod passes through the perforation of the cylindrical base and extends outward from the support column.

4. The independent three-line pendulum air-bearing vibration isolation platform according to claim 3, characterized in that: The support rod is provided with a retaining edge at the position corresponding to the through hole of the cylinder seat. The cross-section of the retaining edge is a trapezoidal structure that is narrower at the top and wider at the bottom. The diameter of the upper edge of the retaining edge is smaller than the diameter of the through hole of the cylinder seat, and the diameter of the lower edge of the retaining edge is larger than the diameter of the through hole of the cylinder seat. The upper end of the retaining edge is located inside the through hole of the cylinder seat, and the lower end of the retaining edge is located inside the cylinder seat.

5. The independent three-line pendulum air-bearing vibration isolation platform according to claim 4, characterized in that: On the bottom wall inside the mounting cylinder, a support pad ring is provided at a position corresponding to the outer periphery of the mesh, and the lower end of the cylinder seat rests on the support pad ring.

6. The independent three-line pendulum air-bearing vibration isolation platform according to claim 3, characterized in that: The air flotation device includes an annular floating rubber sheet. The diameter of the inner hole of the floating rubber sheet is larger than the diameter of the through hole in the cylinder seat. The inner edge of the floating rubber sheet rests on the top plate of the cylinder seat, and the outer edge of the floating rubber sheet rests on the edge of the opening at the top of the support column. An annular pressure plate is provided above the inner edge of the floating rubber sheet. The inner hole of the pressure plate corresponds to the position of the through hole in the cylinder seat. The pressure plate is fixedly connected to the top plate of the cylinder seat and seals and compacts the inner edge of the floating rubber sheet. An annular pressure plate is provided above the outer edge of the floating rubber sheet. A ring-shaped cover plate is provided, with a convex center. A floating cavity exists between the cover plate and the pressure plate to facilitate the inflation of the floating rubber. The cover plate is fixedly connected to the top edge of the support column and seals and presses the outer edge of the floating rubber. The floating rubber blocks the upper end of the ventilation gap inside the mounting cylinder. The pressure plate and the cover plate cooperate to press the inner and outer edges of the floating rubber to form a gas spring. The top of the support rod passes through the floating rubber, the pressure plate, and the inner hole in the middle of the cover plate in sequence. The support plate is located on the outside of the cover plate.

7. The independent three-line pendulum air-bearing vibration isolation platform according to claim 6, characterized in that: The floating rubber sheet has a downwardly protruding sealing head at the position corresponding to its inner hole and the bottom of its outer edge. The sealing head has a notch in the middle, and the two sides of the notch are arc-shaped, forming two symmetrical fan-shaped parts. The fan-shaped parts have holes. The top plate of the cylinder seat and the top edge of the support column are respectively provided with sealing grooves to facilitate the insertion of the sealing head. The bottom of the sealing groove is provided with an upwardly protruding abutment block. The abutment block is adapted to the shape of the notch, and the two symmetrical fan-shaped parts are respectively inserted on both sides of the abutment block.

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