A shock absorbing platform for precision instruments

Abstract

This utility model relates to the field of vibration reduction and isolation technology, and discloses a vibration reduction platform for precision instruments, including a base and a platform. A vibration reduction mechanism is provided at the bottom of the platform, and a supporting outer column is fixedly connected to the bottom of the base. A supporting mechanism is provided on the outer wall of the platform, and a base plate is fixedly connected to the bottom of the supporting outer column. An adjustment mechanism is provided at the bottom of the platform, and a monitoring mechanism is provided at the top of the base. The vibration reduction mechanism includes multiple disc springs, the tops of which are fixedly connected to the bottom of the platform. An energy-dissipating plate is fixedly connected to the bottom of the platform. In this utility model, the disc springs flatten the surface to provide emergency support and prevent overturning; the energy-dissipating plate dissipates energy during low-frequency vibrations; the transformer damper adjusts the amplitude to offset vibrations; ball bearings suppress vertical vibrations; and the double-track misalignment and shearing of the inner and outer columns suppresses horizontal vibrations, enhancing horizontal vibration isolation and suppressing multi-directional disturbances.

Description

Technical Field

[0001] This utility model relates to the field of vibration reduction and isolation technology, and in particular to a vibration reduction platform for precision instruments. Background Technology

[0002] Precision instruments are devices that can achieve extremely high precision, sensitivity, or resolution in measurement, analysis, or manufacturing. Precision instruments are extremely sensitive to environmental vibration interference, and the performance of the instrument depends on whether the error can be controlled. In order to deal with vibration suppression, vibration damping platforms are needed to eliminate the impact of vibration.

[0003] Vibration damping platforms for precision instruments are core devices for eliminating environmental vibration interference and ensuring the stable operation of high-precision equipment. The devices actively control and dynamically cancel vibrations, and are particularly good at suppressing low-frequency vibrations. They are used in instruments that are extremely sensitive to micro-vibrations.

[0004] Vibration damping platforms used for precision instruments employ springs or air flotation devices to suppress vertical vibrations. However, traditional springs or air flotation devices are ineffective at isolating horizontal vibrations and are unable to cope with low-frequency oscillations. Furthermore, air flotation devices require a continuous air supply and a sealed design, resulting in high maintenance costs and reliance on external energy. Existing solutions include using a two-stage damping mechanism to absorb vibration energy in combination, and employing an air-floating pendulum to reduce the horizontal natural frequency using the principle of a single pendulum. However, these solutions still suffer from weak horizontal vibration isolation and difficulty in suppressing multi-directional disturbances. Moreover, they do not overcome the dependence on energy, which limits the adaptability of the equipment. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a vibration damping platform for precision instruments, aiming to improve the problem of horizontal vibration isolation in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a shock-absorbing platform for precision instruments, comprising a base and a platform, wherein a shock-absorbing mechanism is provided at the bottom of the platform, a supporting outer column is fixedly connected to the bottom of the base, a supporting mechanism is provided on the outer wall of the platform, a base plate is fixedly connected to the bottom of the supporting outer column, an adjustment mechanism is provided at the bottom of the platform, and a monitoring mechanism is provided at the top of the base.

[0007] The shock absorption mechanism includes multiple disc springs, the tops of which are fixedly connected to the bottom of the platform. An energy-dissipating plate is fixedly connected to the bottom of the platform, and two transformer shock absorbers are fixedly connected to the bottom of the energy-dissipating plate. An inner support column is slidably connected to the inner wall of the outer support column. A left-hand spiral track is provided on the inner wall of the outer support column, and a right-hand spiral track is provided on the outer wall of the inner support column. Ball chains are slidably connected to the inner walls of both the left-hand and right-hand spiral tracks. A vibration damping component is provided on the top of the platform.

[0008] As a further description of the above technical solution:

[0009] The support mechanism includes multiple telescopic rods, the bottom ends of which are fixedly connected to the top of the base plate, and the top ends of which are fixedly connected to support protrusions. Multiple connecting rings are fixedly connected to the outer wall of the platform, and positioning holes are provided on the outer walls of the connecting rings. A rubber pad is fixedly connected to the top of the platform, and an instrument fixing plate is fixedly connected to the top of the rubber pad. Fixing components are provided on the outer wall of the instrument fixing plate.

[0010] As a further description of the above technical solution:

[0011] The adjustment mechanism includes two T-shaped slide bars. The tops of the two T-shaped slide bars are fixedly connected to the bottom of the platform. The outer walls of the two T-shaped slide bars are slidably connected to counterweights. The opposite sides of the two counterweights are threaded with fixing screws.

[0012] As a further description of the above technical solution:

[0013] The monitoring mechanism includes a piezoelectric accelerometer, the top of which is fixedly connected to the bottom right side of the platform, and a laser displacement sensor is fixedly connected to the top left side of the base.

[0014] As a further description of the above technical solution:

[0015] The vibration damping assembly includes multiple vibration isolators, the bottoms of which are fixedly connected to the bottom of the platform, and a damping plate is fixedly connected to the top of the platform.

[0016] As a further description of the above technical solution:

[0017] The fixing component includes multiple bolts, the outer walls of which are threadedly connected to the outer wall of the instrument fixing plate groove. The outer wall of the instrument fixing plate groove has multiple threaded holes, and the outer walls of the multiple bolts are slidably connected with elastic washers.

[0018] As a further description of the above technical solution:

[0019] An upper wing plate is fixedly connected to the top of the outer wall of the supporting outer column, and a lower wing plate is fixedly connected to the bottom of the outer wall of the supporting outer column.

[0020] As a further description of the above technical solution:

[0021] The bottom of the base plate is fixedly connected to a shock-absorbing pad, and the bottom of the base plate is fixedly connected to two anti-slip strips.

[0022] This utility model has the following beneficial effects:

[0023] In this invention, the disc spring stiffness is used to offset vibrations when the device experiences small amplitudes, and the disc spring is compressed to provide emergency support and prevent overturning when the amplitude is large. The energy dissipation plate dissipates the energy of low-frequency vibrations, the transformer damper adjusts the amplitude to offset vibrations, and the ball collision suppresses vertical vibrations. The double-track misalignment shearing of the inner and outer columns suppresses horizontal vibrations. The vibration isolator reduces and eliminates the transmission of vibration force, and the damping plate consumes kinetic energy, overcomes energy dependence, enhances horizontal vibration isolation, and suppresses multi-directional disturbances.

[0024] In this invention, by activating the telescopic rod, the support protrusion at the top engages with the positioning hole on the connecting ring, providing support force to the platform and locking the shock absorption mechanism to prevent accidental movement. The instrument fixing plate is fixed to the precision instrument with bolts, and there are elastic washers between the bolts and the precision instrument for buffering. There are also rubber pads between the instrument fixing plate and the platform for buffering, reducing the inconvenience of installation caused by the shock absorption mechanism during instrument installation and facilitating equipment maintenance. Attached Figure Description

[0025] Figure 1 This is a perspective view of a shock-absorbing platform for precision instruments proposed in this utility model;

[0026] Figure 2 This is a front view of a shock-absorbing platform for precision instruments proposed in this utility model;

[0027] Figure 3 This is a split view of the platform of a shock-absorbing platform for precision instruments proposed in this utility model;

[0028] Figure 4 This is a split view of the inner support column of a shock-absorbing platform for precision instruments proposed in this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of a telescopic rod for a shock-absorbing platform used in precision instruments, as proposed in this utility model.

[0030] Legend:

[0031] 1. Base; 2. Platform; 3. Supporting outer column; 4. Vibration damping mechanism; 401. Disc spring; 402. Energy dissipation plate; 403. Transformer vibration damper; 404. Supporting inner column; 405. Left-hand helical track; 406. Right-hand helical track; 407. Ball chain; 408. Vibration damping component; 4081. Vibration isolator; 4082. Damping plate; 5. Base plate; 6. Support mechanism; 601. Telescopic rod; 602. Supporting protrusion; 603. Connecting ring 604. Positioning hole; 605. Rubber pad; 606. Instrument fixing plate; 607. Fixing assembly; 6071. Bolt; 6072. Threaded hole; 6073. Elastic washer; 7. Adjustment mechanism; 701. T-shaped slide bar; 702. Counterweight; 703. Fixing screw; 8. Monitoring mechanism; 801. Piezoelectric accelerometer; 802. Laser displacement sensor; 9. Upper wing plate; 10. Lower wing plate; 11. Shock-absorbing pad; 12. Anti-slip strip. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 2 , Figure 3 and Figure 4 The present invention provides an embodiment of a vibration damping platform for precision instruments, comprising a base 1 and a platform 2. A vibration damping mechanism 4 is provided at the bottom of the platform 2. The vibration damping mechanism 4 is the most important component for reducing vibration frequency. A supporting outer column 3 is fixedly connected to the bottom of the base 1. The supporting outer column 3 serves as the main support. A supporting mechanism 6 is provided on the outer wall of the platform 2. The supporting mechanism 6 provides additional support during maintenance and installation. A base plate 5 is fixedly connected to the bottom of the supporting outer column 3. An adjustment mechanism 7 is provided at the bottom of the platform 2. The adjustment mechanism 7 is used for adjustment during instrument installation. A monitoring mechanism 8 is provided at the top of the base 1. The monitoring mechanism 8 is used to monitor the vibration damping status of the vibration damping mechanism 4.

[0034] The shock absorption mechanism 4 includes multiple disc springs 401. The tops of the disc springs 401 are fixedly connected to the bottom of the platform 2. The spring group formed by the disc springs 401 cancels the positive stiffness of the system with negative stiffness at small amplitudes, and flattens the disc springs at large amplitudes to provide emergency support and prevent overturning. An energy dissipation plate 402 is fixedly connected to the bottom of the platform 2. The energy dissipation plate 402 reduces the kinetic energy transmitted by the amplitude. Two transformer shock absorbers 403 are fixedly connected to the bottom of the energy dissipation plate 402. The transformer shock absorbers 403 automatically adjust according to the amplitude to cancel the vibration. The inner wall of the outer support column 3 is slidably connected to the inner support column 404. The inner wall of the outer support column 3 is provided with a left helical track 405, and the outer wall of the inner support column 404 is provided with a right helical track 406. The double-track misalignment shear of the outer support column 3 and the inner support column 404 suppresses horizontal vibration. The inner walls of the left helical track 405 and the right helical track 406 are slidably connected with ball chains 407. The ball chains 407 collide to suppress vertical vibration. The top of the platform 2 is provided with a vibration damping component 408, which is also used to reduce the amplitude.

[0035] The vibration damping component 408 includes multiple vibration isolators 4081. The bottom of each vibration isolator 4081 is fixedly connected to the bottom of the platform 2. The vibration isolators 4081 reduce and eliminate the transmission of vibration force. The top of the base plate 5 is fixedly connected to a damping plate 4082. The damping plate 4082 converts the kinetic energy transmitted by the amplitude into heat energy and dissipates it.

[0036] Specifically, disc springs 401 are distributed at the four corners of the platform 2. The spring group formed by the disc springs 401 has negative stiffness to offset the positive stiffness of the system when the amplitude is small, and the disc springs are flattened when the amplitude is large to provide emergency support to prevent overturning. The energy dissipation plate 402 reduces the kinetic energy of the transmitted amplitude. The transformer damper 403 automatically adjusts according to the amplitude to offset part of the amplitude. The outer support column 3 and the inner support column 404 work together to play the main support role. When the amplitude is transmitted, the double-track misalignment shear of the outer support column 3 and the inner support column 404 suppresses horizontal vibration. The ball chain 407 in the spiral track collides with each other to suppress vertical vibration. The vibration isolator 4081 also plays the role of reducing and eliminating the transmission of vibration force. The damping plate 4082 converts the kinetic energy transmitted by the amplitude into heat energy for dissipation, enhances horizontal vibration isolation, and suppresses multi-directional disturbances.

[0037] Reference Figure 1 , Figure 3 and Figure 5The support mechanism 6 includes multiple telescopic rods 601, the bottom ends of which are fixedly connected to the top of the base plate 5. The telescopic rods 601 extend and retract to provide support force. The top ends of the multiple telescopic rods 601 are fixedly connected to support protrusions 602, which expand the support surface. Multiple connecting rings 603 are fixedly connected to the outer wall of the platform 2. The outer walls of the multiple connecting rings 603 are provided with positioning holes 604. The positioning holes 604 fit with the support protrusions 602 for easy positioning and support. A rubber pad 605 is fixedly connected to the top of the platform 2. The rubber pad 605 serves as a buffer and shock absorber. An instrument fixing plate 606 is fixedly connected to the top of the rubber pad 605. The instrument fixing plate 606 facilitates the installation and fixing of precision instruments. A fixing component 607 is provided on the outer wall of the instrument fixing plate 606 for fixing the instrument.

[0038] The fixing component 607 includes multiple bolts 6071, the outer walls of which are threaded to the outer wall of the instrument fixing plate 606. The outer wall of the instrument fixing plate 606 has multiple threaded holes 6072. The bolts 6071 and the threaded holes 6072 are threaded to fix the precision instrument to the instrument fixing plate 606. The outer walls of the multiple bolts 6071 are slidably connected with elastic washers 6073. The elastic washers 6073 isolate the bolts 6071 and the instrument to prevent damage to the instrument.

[0039] Specifically, the telescopic rod 601 extends and retracts to provide support, the support protrusion 602 expands the support surface, and the telescopic rod 601 extends, so that the positioning hole 604 fits into the support protrusion 602, facilitating positioning and providing support. At the same time, it isolates the shock-absorbing mechanism 4 to prevent it from affecting the installation. The rubber pad 605 acts as a buffer and shock absorber. The instrument fixing plate 606 facilitates the installation and fixing of precision instruments. The bolt 6071 and the threaded hole 6072 are threaded to fix the precision instrument to the instrument fixing plate 606. The elastic washer 6073 isolates the bolt 6071 from the instrument to prevent damage to the instrument, reduce the installation inconvenience caused by the shock-absorbing mechanism 4 during instrument installation, and facilitate equipment maintenance.

[0040] Reference Figure 2 , Figure 3 and Figure 5 The adjustment mechanism 7 includes two T-shaped slide bars 701. The tops of the two T-shaped slide bars 701 are fixedly connected to the bottom of the platform 2. The T-shaped slide bars 701 facilitate the movement of the counterweight 702. The outer walls of the two T-shaped slide bars 701 are slidably connected to the counterweight 702. The counterweight 702 has a certain mass. Moving the counterweight 702 changes the center of gravity distribution of the platform and counteracts the off-center load problem caused by the instrument placement offset. The opposite sides of the two counterweights 702 are threaded with fixing screws 703. The fixing screws 703 are used to fix the counterweights 702 to prevent additional vibration.

[0041] The monitoring mechanism 8 includes a piezoelectric accelerometer 801. The top of the piezoelectric accelerometer 801 is fixedly connected to the bottom right side of the platform 2. The piezoelectric accelerometer 801 is highly sensitive to monitor vibration signals. A laser displacement sensor 802 is fixedly connected to the top left side of the base 1. The laser displacement sensor 802 measures the vibration amplitude.

[0042] An upper wing plate 9 is fixedly connected to the top of the outer wall of the supporting outer column 3. The upper wing plate 9 evenly spreads the amplitude transmission. A lower wing plate 10 is fixedly connected to the bottom of the outer wall of the supporting outer column 3. The lower wing plate 10 is used to concentrate the amplitude transmission. A shock-absorbing pad 11 is fixedly connected to the bottom of the base plate 5. The shock-absorbing pad 11 reduces the vibration transmission between the base plate 5 and the ground. Two anti-slip strips 12 are fixedly connected to the bottom of the base plate 5. The anti-slip strips 12 prevent the base plate 5 from shifting off from the ground.

[0043] Specifically, the T-shaped slider 701 facilitates the movement of the counterweight 702. The outer walls of both T-shaped sliders 701 are slidably connected to the counterweight 702. The counterweight 702 has a certain mass. Moving the counterweight 702 changes the center of gravity distribution of the platform, offsetting the off-center load problem caused by the instrument's placement offset. The fixing screw 703 is used to fix the counterweight 702 to prevent additional vibration. The piezoelectric accelerometer 801 highly sensitively monitors the vibration signal, and the laser displacement sensor 802 measures the vibration amplitude to monitor the working status of the shock absorption mechanism 4. The upper wing plate 9 evenly spreads the amplitude transmission, and the lower wing plate 10 is used to concentrate the amplitude transmission. The shock absorption pad 11 reduces the vibration transmission between the base plate 5 and the ground, and the anti-slip strip 12 prevents offset from the ground, ensuring that the instrument is not affected by the amplitude, monitoring the efficiency of the shock absorption process, and improving stability.

[0044] Working principle: When the shock absorption mechanism 4 is working, the disc springs 401 are distributed at the four corners of the platform 2. The spring group formed by the disc springs 401 has negative stiffness to offset the positive stiffness of the system when the amplitude is small. When the amplitude is large, the disc springs are flattened to provide emergency support to prevent overturning. The energy dissipation plate 402 will reduce the kinetic energy of the upward amplitude. The transformer shock absorber 403 will automatically adjust according to the amplitude to offset part of the amplitude. The outer support column 3 and the inner support column 404 will jointly play the role of main support. When the amplitude is transmitted, the double-track misalignment shear of the outer support column 3 and the inner support column 404 will suppress horizontal vibration. The ball chain 407 in the spiral track will collide with each other to suppress vertical vibration. The vibration isolator 4081 will also play the role of reducing and eliminating the transmission of vibration force. The damping plate 4082 will convert the kinetic energy transmitted by the amplitude into heat energy for dissipation, enhance horizontal vibration isolation, and suppress multi-directional disturbances.

[0045] Furthermore, when installing or maintaining the instrument, the telescopic rod 601 extends, allowing the positioning hole 604 to engage with the support protrusion 602, facilitating positioning and providing support. The support protrusion 602 expands the support surface, providing support force while isolating the shock-absorbing mechanism 4 to prevent it from affecting the installation. The rubber pad 605 acts as a buffer and shock absorber. The instrument mounting plate 606 facilitates the installation and fixation of precision instruments. The bolts 6071 and threaded holes 6072 are threaded to fix the precision instruments to the instrument mounting plate 606. The elastic washer 6073 isolates the bolts 6071 from the instrument to prevent damage to the instrument, reducing the installation inconvenience caused by the shock-absorbing mechanism 4 during instrument installation, facilitating instrument installation, and making equipment maintenance convenient.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shock-absorbing platform for precision instruments, comprising a base (1) and a platform (2), characterized in that: The bottom of the platform (2) is provided with a shock-absorbing mechanism (4), the bottom of the base (1) is fixedly connected with a supporting outer column (3), the outer wall of the platform (2) is provided with a supporting mechanism (6), the bottom of the supporting outer column (3) is fixedly connected with a base plate (5), the bottom of the platform (2) is provided with an adjustment mechanism (7), and the top of the base (1) is provided with a monitoring mechanism (8). The damping mechanism (4) includes multiple disc springs (401), the tops of which are fixedly connected to the bottom of the platform (2). The bottom of the platform (2) is fixedly connected to an energy-dissipating plate (402), and the bottom of the energy-dissipating plate (402) is fixedly connected to two transformer dampers (403). The inner wall of the outer support column (3) is slidably connected to an inner support column (404). The inner wall of the outer support column (3) is provided with a left-hand spiral track (405), and the outer wall of the inner support column (404) is provided with a right-hand spiral track (406). The inner walls of the left-hand spiral track (405) and the right-hand spiral track (406) are slidably connected to ball chains (407). The top of the platform (2) is provided with a shock-absorbing component (408).

2. The vibration damping platform for precision instruments according to claim 1, characterized in that: The support mechanism (6) includes multiple telescopic rods (601), the bottom ends of which are fixedly connected to the top of the base plate (5), and the top ends of which are fixedly connected to support protrusions (602). Multiple connecting rings (603) are fixedly connected to the outer wall of the platform (2), and positioning holes (604) are opened on the outer wall of the multiple connecting rings (603). A rubber pad (605) is fixedly connected to the top of the platform (2), and an instrument fixing plate (606) is fixedly connected to the top of the rubber pad (605). A fixing component (607) is provided on the outer wall of the instrument fixing plate (606).

3. The vibration damping platform for precision instruments according to claim 1, characterized in that: The adjustment mechanism (7) includes two T-shaped slide bars (701). The tops of the two T-shaped slide bars (701) are fixedly connected to the bottom of the platform (2). The outer walls of the two T-shaped slide bars (701) are slidably connected to counterweights (702). The opposite sides of the two counterweights (702) are threadedly connected to fixing screws (703).

4. A vibration damping platform for precision instruments according to claim 1, characterized in that: The monitoring mechanism (8) includes a piezoelectric accelerometer (801), the top of which is fixedly connected to the bottom right side of the platform (2), and a laser displacement sensor (802) is fixedly connected to the top left side of the base (1).

5. A vibration damping platform for precision instruments according to claim 1, characterized in that: The vibration damping assembly (408) includes multiple vibration isolators (4081), the bottom of which is fixedly connected to the bottom of the platform (2), and the top of the base plate (5) is fixedly connected to a damping plate (4082).

6. A vibration damping platform for precision instruments according to claim 2, characterized in that: The fixing component (607) includes a plurality of bolts (6071), the outer walls of which are threadedly connected to the outer wall of the instrument fixing plate (606). The outer wall of the instrument fixing plate (606) has a plurality of threaded holes (6072), and the outer walls of the plurality of bolts (6071) are slidably connected with elastic washers (6073).

7. A vibration damping platform for precision instruments according to claim 1, characterized in that: The top of the outer wall of the supporting outer column (3) is fixedly connected to an upper wing plate (9), and the bottom of the outer wall of the supporting outer column (3) is fixedly connected to a lower wing plate (10).

8. A vibration damping platform for precision instruments according to claim 1, characterized in that: The bottom of the base plate (5) is fixedly connected to a shock-absorbing pad (11), and the bottom of the base plate (5) is fixedly connected to two anti-slip strips (12).

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