Pendulum-type air-floating vibration isolation optical platform

Abstract

The utility model discloses a swing -rod type air floatation vibration isolation optical platform, including platform body and support column, be provided with the installation cavity in the support column, be provided with the hollow cylinder seat in the installation cavity, the open place of cylinder seat at its top is provided with air floatation device, the top of air floatation device is provided with the cylinder cover, the middle part of cylinder cover is provided with the opening, is provided with the support rod on air floatation device, and the support rod passes through the opening and extends to the top of cylinder cover, and the top of support rod is provided with the support disc that can swing outside cylinder cover, and platform body is installed at the top of support disc. The utility model discloses a support rod is set up on air floatation device, and the top of support rod is provided with the support disc that can swing, and the support disc and support rod cooperate a single line swing -rod structure, so, when the equipment works and generates the vibration on platform body, it can cooperate air floatation device together and carry out damping operation, and single line swing -rod structure can isolate the vibration of low frequency band, so can improve the damping effect of whole platform greatly.

Description

Technical Field

[0001] This utility model relates to the field of vibration isolation platform technology, specifically to a pendulum-type air-bearing vibration isolation optical 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 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, causing the platform to sink and contact the valve stem of the lever control valve, activating it. At this time, an air pump fills the gas spring at the sinking position with air, causing the gas spring to inflate. The inflated gas spring then lifts the platform, raising its height and separating it from the valve stem, allowing the platform to return to its initial horizontal state. However, some experimental equipment generates vibrations during operation, requiring the gas spring device to dampen these vibrations. But the gas spring's damping capability is limited, primarily isolating mid-to-high frequency vibrations, which affects its damping effect. Utility Model Content

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

[0004] The present invention adopts the following technical solution: a pendulum-type air-bearing vibration isolation optical platform, comprising a platform body and support columns disposed at each end corner of the bottom of the platform body. The support columns are provided with mounting cavities, and hollow cylindrical seats with top openings are disposed within the mounting cavities. An air-bearing device is disposed at the top opening of the cylindrical seat. A cylindrical cover is disposed above the air-bearing device, and an opening is disposed in the middle of the cylindrical cover. A support rod is vertically disposed on the air-bearing device, and the support rod passes through the opening and extends upwards towards the cylindrical cover. A swingable support plate is disposed at the top of the support rod outside the cylindrical cover, and the platform body is mounted on the top of the support plate.

[0005] An air hole is provided on one side of the support column, and a lever control valve is provided on the outside of the support column. The air inlet of the lever control valve is connected to the air pump through a pipeline, and the air outlet of the lever control valve is connected to the air hole through a pipeline. An air inlet pipe is provided at the bottom of the cylinder base, and the lever control valve controls the air pump to supply air to the air flotation device.

[0006] Furthermore, the cavity of the support column has a support edge on its inner wall near its top opening, and the cylinder seat has an installation edge at its upper edge. The installation edge rests on the support edge, and the two are fixedly connected by a screw. The air flotation device is clamped between the installation edge and the cylinder cover, and the cylinder cover is also fixedly connected to the installation edge by a screw.

[0007] Furthermore, the top of the support rod is provided with a protruding mounting head, and the lower end of the support plate is provided with a connector. The connector is inserted into the mounting head, and the diameter of the slot on the connector is larger than the diameter of the mounting head. The top of the support plate is provided with a countersunk hole at the position corresponding to the connector. A fastening screw is provided in the countersunk hole. The top of the mounting head is provided with a threaded hole, and a through hole is provided on the bottom wall of the countersunk hole. The fastening screw passes through the through hole and is screwed into the threaded hole. There is a play gap between the head of the fastening screw and the bottom wall of the countersunk hole.

[0008] Furthermore, the air flotation device includes an annular air flotation rubber sheet, the edge of which is clamped between the support edge and the mounting edge. An upper pad and a lower pad are respectively provided at the upper and lower ends of the air flotation rubber sheet in the middle. The upper pad and the lower pad are clamped to the upper and lower end faces of the air flotation rubber sheet by screws. The support rod is installed on the top of the upper pad.

[0009] Furthermore, the upper pad has a screw hole in its middle, and the bottom of the support rod has a screw head, which is screwed into the screw hole.

[0010] Furthermore, a partition is provided inside the cylinder seat, and an air passage is provided on the partition. The partition causes the lower end of the cylinder seat to form an air chamber, and the upper end of the partition and the air flotation rubber form an air filling cavity.

[0011] Furthermore, a sealing ring is fitted onto the lower end of the mounting edge of the cylinder base, and a placement groove is provided at the lower end of the mounting edge. The sealing ring is placed in the placement groove, and the lower end of the sealing ring extends out of the placement groove. The part of the sealing ring extending out of the placement groove has a tapered structure that is wider at the top and narrower at the bottom. Several toothed grooves are evenly distributed at the lower end of the mounting edge corresponding to the edge of the placement groove. The toothed grooves are connected to the placement groove. A bevel groove is provided at the top of the support edge corresponding to the position of the sealing ring. The part of the sealing ring extending out of the placement groove abuts against the bevel groove.

[0012] The above-mentioned technical solution of this utility model has the following beneficial effects: By setting a support rod on the air flotation device and setting a swingable support plate on the top of the support rod, the support plate and the support rod cooperate with a single-line pendulum structure. In this way, when the equipment vibrates while working on the platform body, it can work together with the air flotation device to perform vibration reduction. The single-line pendulum structure can isolate low-frequency vibrations, thus greatly improving the vibration reduction effect of the entire platform. Attached Figure Description

[0013] 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:

[0014] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the main structure of the support column in an embodiment of this utility model;

[0016] Figure 3 This is a schematic cross-sectional view of the upper part of the support column in an embodiment of the present invention;

[0017] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0018] Figure 5 This is a schematic diagram of the planar structure of the cylinder base from the bottom view of an embodiment of this utility model;

[0019] Figure 6 This is a cross-sectional view of the sealing ring before assembly in an embodiment of this utility model.

[0020] Figure 7 This is a schematic cross-sectional view of the sealing ring after assembly in an embodiment of the present invention. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] like Figure 1-7 As shown, this utility model embodiment provides a pendulum-type air-bearing vibration isolation optical platform, including a platform body 1 and support columns 2 set at each end corner of the bottom of the platform body 1. The support columns 2 are provided with an installation cavity, and a hollow cylinder seat 7 with a top opening is provided in the installation cavity 2. An air-bearing device is provided at the top opening of the cylinder seat 7. A cylinder cover 3 is provided above the air-bearing device. An opening is provided in the middle of the cylinder cover 3. A support rod 4 is vertically provided on the air-bearing device. The support rod 4 passes through the opening and extends upward to the cylinder cover 2. A swingable support plate 5 is provided at the top of the support rod 4 outside the cylinder cover 3. The platform body 1 is installed on the top of the support plate 5.

[0024] A vent 6 is provided on one side of the support column 2, and a lever control valve 8 is provided on the outside of the support column 2. The air inlet of the lever control valve 8 is connected to the air pump through a pipeline, and the air outlet of the lever control valve 8 is connected to the vent 6 through a pipeline. An air inlet pipe 21 is provided at the bottom of the cylinder base 7. The lever control valve 8 controls the air pump to supply air to the air flotation device.

[0025] The cavity of the support column 2 has a support edge 9 on its inner wall near the top opening. The cylinder seat 7 has an installation edge 10 at its upper edge. The installation edge 10 rests on the support edge 9 and the two are fixedly connected by a screw. The air flotation device is clamped between the installation edge 10 and the cylinder cover 3. The cylinder cover 3 is also fixedly connected to the installation edge 10 by a screw.

[0026] The diameter of the cylinder seat 7 is matched with the diameter of the support along the 9.

[0027] The support rod 4 has a protruding mounting head 11 at its top, and the support plate 5 has a connector 12 at its lower end. The connector 12 is inserted into the mounting head 11. The diameter of the slot on the connector 12 is larger than the diameter of the mounting head 12. The support plate 5 has a countersunk hole 13 at the position corresponding to the connector 12 at its top. A fastening screw 14 is installed in the countersunk hole 13. The mounting head 11 has a threaded hole at its top. A through hole is provided on the bottom wall of the countersunk hole 13. The fastening screw 14 passes through the through hole and is screwed into the threaded hole. There is a play between the head of the fastening screw 14 and the bottom wall of the countersunk hole 13.

[0028] The gap between the connector 12 and the mounting head 11, and the gap between the head of the fastening screw 14 and the bottom wall of the countersunk hole 13, allow the support plate 5 to swing slightly at the top of the support rod 4. Thus, the support rod 4 and the swingable support plate 5 cooperate to form a single-line swing rod structure, which enables the platform body 1 on it to resist low-frequency vibration.

[0029] The air flotation device includes an annular air flotation rubber sheet 15. The edge of the air flotation rubber sheet 15 is clamped between the support edge 9 and the mounting edge 10. An upper pad 17 and a lower pad 18 are respectively provided at the upper and lower ends of the air flotation rubber sheet 15. The upper pad 17 and the lower pad 18 are clamped to the upper and lower end faces of the air flotation rubber sheet 15 by screws. The support rod 4 is installed on the top of the upper pad 17.

[0030] The upper pad 7 has a screw hole in its middle, and the bottom of the support rod 4 has a screw head 18, which is screwed into the screw hole.

[0031] A partition 19 is provided inside the cylinder base 7. An air passage 20 is provided on the partition 19. The partition 19 forms an air chamber at the lower end of the cylinder base 7, and an air-filling chamber is formed between the upper end of the partition 19 and the air-floating rubber 15.

[0032] There is an air-inflated gap between the air-float rubber 15 and the cylinder cover 3. The air-float rubber 15, the cylinder base 7, and the cylinder cover 3 work together to form an air spring.

[0033] A sealing ring 22 is fitted on the lower end of the mounting edge 10 of the cylinder base 7. A placement groove 23 is provided at the lower end of the mounting edge 10. The sealing ring 22 is placed in the placement groove 23, and the lower end of the sealing ring 22 extends out of the placement groove 23. The part of the sealing ring 22 that extends out of the placement groove 23 has a narrowed diameter structure that is wider at the top and narrower at the bottom. Several toothed grooves 24 are evenly distributed at the lower end of the mounting edge 10 at the position corresponding to the edge of the placement groove 23. The toothed grooves 24 are connected to the placement groove 23. A bevel groove 25 is provided at the top of the support edge 9 at the position corresponding to the sealing ring 22. The part of the sealing ring 22 that extends out of the placement groove 23 is pressed against the bevel groove 25.

[0034] The sealing ring 22 is fitted onto the outside of the cylinder base 7. The sealing ring 22 is installed in the placement groove 23 at the lower edge of the mounting edge 10. When the mounting edge 10 and the support edge 9 of the cylinder base 7 are installed by screws, the part of the sealing ring 22 protruding from the placement groove 23 will press against the bevel groove 25. The mounting edge 10 and the support edge 9 cooperate to squeeze the sealing ring 22, thereby deforming the sealing ring 22 and filling it into the groove 25 and the toothed groove 24. This makes the sealing performance of the cylinder base 7 and the support column 2 stronger after installation, preventing air leakage in the support column 2.

[0035] The working principle of this utility model is as follows: Air is pumped into the cavity inside the support column 2 by an air pump. The air flows into the inner cavity of the cylinder seat 7 through the air inlet pipe 21 at the bottom of the cylinder seat 7. Then, the air enters the upper part of the cylinder seat 7 through the air passage hole 20 on the partition plate 19. The air filling causes the air flotation rubber 15 to expand, thereby lifting the support plate 5 upward. The platform body 1 is installed on each support plate 5. After the equipment is placed on the platform body 1, the weight of the equipment will press down on the platform body 1. The air flotation device corresponding to the equipment's anti-suspension position will squeeze the air, thereby causing one side of the platform body 1 to sink. At this time, the lowered part of the platform body 1 will contact the lever control valve 8 on the support column 2, thereby triggering the lever control valve 8. The air pump starts to continue to fill the support column 2 on the lowered side with air. The air in the support column 2 enters the upper part of the cylinder seat 7 through the air inlet pipe 21 and air passage 21 at the bottom of the cylinder seat 7, causing the air flotation rubber 15 to continue to inflate, thereby lifting the lowered side of the entire platform body 1, and thus restoring the entire platform body 1 to a horizontal state. When the equipment works on the platform body 1, the vibration generated will be isolated by the air flotation device and the swing rod structure, so that the equipment can operate smoothly.

[0036] 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. A pendulum-type air-bearing vibration isolation optical 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 mounting cavity, and each mounting cavity contains a hollow cylindrical seat with a top opening. An air flotation device is installed at the top opening of the cylindrical seat. A cylindrical cover is installed above the air flotation device, and the middle of the cylindrical cover has an opening. A support rod is vertically installed on the air flotation device, and the support rod passes through the opening and extends upwards towards the cylindrical cover. A swingable support plate is installed at the top of the support rod outside the cylindrical cover, and the platform body is installed on the top of the support plate. An air hole is provided on one side of the support column, and a lever control valve is provided on the outside of the support column. The air inlet of the lever control valve is connected to the air pump through a pipeline, and the air outlet of the lever control valve is connected to the air hole through a pipeline. An air inlet pipe is provided at the bottom of the cylinder base, and the lever control valve controls the air pump to supply air to the air flotation device.

2. The pendulum-type air-bearing vibration isolation optical platform according to claim 1, characterized in that: The cavity of the support column has a support edge on the inner wall near its top opening. The cylinder seat has an installation edge at its upper edge. The installation edge rests on the support edge, and the two are fixedly connected by a screw. The air flotation device is clamped between the installation edge and the cylinder cover. The cylinder cover is also fixedly connected to the installation edge by a screw.

3. The pendulum-type air-bearing vibration isolation optical platform according to claim 2, characterized in that: The support rod has a protruding mounting head at its top, and the support plate has a connector at its lower end. The connector is inserted into the mounting head, and the diameter of the slot on the connector is larger than the diameter of the mounting head. The support plate has a countersunk hole at the position corresponding to the connector, and a fastening screw is installed in the countersunk hole. The mounting head has a threaded hole at its top, and a through hole is provided on the bottom wall of the countersunk hole. The fastening screw passes through the through hole and is screwed into the threaded hole. There is a play between the head of the fastening screw and the bottom wall of the countersunk hole.

4. The pendulum-type air-bearing vibration isolation optical platform according to claim 3, characterized in that: The air flotation device includes an annular air flotation rubber sheet, the edge of which is clamped between the support edge and the mounting edge. An upper pad and a lower pad are respectively provided at the upper and lower ends of the air flotation rubber sheet in the middle. The upper pad and the lower pad are clamped to the upper and lower end faces of the air flotation rubber sheet by screws. The support rod is installed on the top of the upper pad.

5. The pendulum-type air-bearing vibration isolation optical platform according to claim 4, characterized in that: The upper pad has a screw hole in its middle, and the bottom of the support rod has a screw head, which is screwed into the screw hole.

6. The pendulum-type air-bearing vibration isolation optical platform according to claim 5, characterized in that: The cylinder seat is provided with a partition plate, and the partition plate is provided with an air passage hole. The partition plate forms an air chamber at the lower end of the cylinder seat, and an air-filling cavity is formed between the upper end of the partition plate and the air-floating rubber.

7. The pendulum-type air-bearing vibration isolation optical platform according to claim 2, characterized in that: The cylinder base is fitted with a sealing ring at the lower end of its mounting edge. A placement groove is provided at the lower end of the mounting edge, and the sealing ring is placed in the placement groove. The lower end of the sealing ring extends out of the placement groove. The part of the sealing ring extending out of the placement groove has a narrowed diameter structure that is wider at the top and narrower at the bottom. Several toothed grooves are evenly distributed at the lower end of the mounting edge at the position corresponding to the edge of the placement groove. The toothed grooves are connected to the placement groove. A beveled groove is provided at the top of the support edge at the position corresponding to the sealing ring. The part of the sealing ring extending out of the placement groove is pressed against the beveled groove.

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