Table type active vibration isolation platform

Abstract

The utility model relates to the technical field of vibration isolation equipment, in particular to a table-type active vibration isolation platform which comprises an external PID (Proportion Integration Differentiation) controller, a metal bottom plate and a storage table top covering the upper part of the metal bottom plate, a vibration isolation space is formed between the metal bottom plate and the storage table top, and two groups of vibration isolation components are mounted at four corners of the vibration isolation space respectively. A vibration isolation assembly driving part used for adjusting the vibration isolation assemblies is installed between every two vibration isolation assemblies, a potential monitoring assembly is installed on one side of every two vibration isolation assemblies, and a piezoelectric sensor set is installed on each of the two sides of the middle of the metal bottom plate. The two sides of each piezoelectric sensor set are each provided with a second piezoelectric sensor, the top ends of the second piezoelectric sensors abut against the bottom face of the containing table top, the movement stroke of the vibration isolation spring is changed through position adjustment, so that force feedback of different degrees is obtained, active feedback is achieved, and the vibration isolation effect is improved. Therefore, six-degree-of-freedom and high-precision vibration isolation with foundation feedback is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration isolation equipment, in particular to a table - type active vibration isolation platform. Background Art

[0002] The main function of the active vibration isolation platform is to reduce the impact of vibration on industrial equipment and the working environment, create a quieter and more stable working environment for the equipment, improve the reliability and service life of the equipment, optimize the working environment, improve work efficiency, and thus improve the working efficiency and production quality of the equipment.

[0003] At present, the active vibration isolation platforms produced on the market are mainly three - axis shock - absorbing, that is, mainly reducing the vibration of the movable tabletop, but unable to effectively isolate the reverse vibration of the vibration isolation table itself and the foundation on which the vibration isolation table is placed, and are greatly affected by the environment.

[0004] Therefore, a table - type active vibration isolation platform is proposed. Summary of the Utility Model

[0005] In order to solve the technical problems existing in the above - mentioned prior art, the utility model provides a table - type active vibration isolation platform.

[0006] To solve the above - mentioned technical problems, the utility model provides the following technical solution: a table - type active vibration isolation platform, including an external PID controller, a metal bottom plate, and a placing tabletop covering the upper part of the metal bottom plate. An isolation space is formed between the metal bottom plate and the placing tabletop. Two groups of vibration isolation components are installed at the four corners of the isolation space. A group of vibration isolation component driving parts for adjusting the vibration isolation components are installed between every two groups of the vibration isolation components. A group of potential monitoring components are installed on one side of every two groups of the vibration isolation components. A group of piezoelectric sensor groups are installed on both sides of the middle of the metal bottom plate. A group of piezoelectric sensors two are installed on both sides of each piezoelectric sensor group. The top of the piezoelectric sensor two abuts against the bottom surface of the placing tabletop. The piezoelectric sensor group and the piezoelectric sensor two are electrically connected to the external PID controller.

[0007] The piezoelectric sensor two generates electrical signals under the pressure of the placing tabletop and the piezoelectric sensor group generates electrical signals under lateral polarization. After receiving the electrical signals, the external PID controller sends out feedback signals. The feedback signals are respectively transmitted to each group of vibration isolation component driving parts. After receiving the signals, the vibration isolation component driving parts drive the vibration isolation components to rotate, and the vibration isolation components change the support height of the placing tabletop by rotation.

[0008] Preferably, there is a movable space between the placing tabletop and the metal bottom plate, and the lower part of the placing tabletop is of a honeycomb structure.

[0009] Preferably, the vibration isolation assembly includes a rotating base, a movable socket, a movable socket limiting rod, a vibration isolation spring and a supporting part. The rotating base is installed on the surface of the metal base plate through a rotating shaft. The movable socket is threadedly connected to the end of the rotating base. The movable socket limiting rod is installed on one side of the position where the rotating base is set on the surface of the metal base plate. One end of the movable socket is sleeved inside the movable socket limiting rod. The movable socket is restricted by the movable socket limiting rod. The vibration isolation spring is sleeved on the upper end of the movable socket. The supporting part is sleeved inside the movable socket. The other end of the vibration isolation spring abuts against the supporting part to provide support for the supporting part.

[0010] Preferably, the driving part of the vibration isolation assembly includes a motor base, a brushless DC motor, a driving gear, a first transmission gear and a first driven gear. The motor base is installed at the middle position between two groups of vibration isolation assemblies at the four corners of the surface of the metal base plate. The brushless DC motor is installed at the middle position on the top of the motor base. The output shaft of the brushless DC motor extends downward into the inside of the motor base. The driving gear is installed at the end of the brushless DC motor. The first transmission gear is installed on one side of the middle part of the motor base through a rotating shaft. The first transmission gear meshes with the driving gear. There are two groups of first driven gears. The two groups of first driven gears are arranged at the front end of the motor base through rotating shafts. Both of the two groups of first driven gears mesh with the driving gear and the rotating bases of the two groups of vibration isolation assemblies respectively.

[0011] Preferably, the potential monitoring assembly includes a potentiometer base, a potentiometer, a second transmission gear and a second driven gear. The potentiometer base is fixed on the surface of the metal base plate. A potentiometer is installed in the middle of the potentiometer base. The output end of the potentiometer

[0012] extends downward to the lower part of the potentiometer base. The second transmission gear is installed at the output end of the potentiometer. The second driven gear is arranged on one side of the potentiometer base. The second driven gear is rotatably connected to the metal base plate through a rotating shaft. The second driven gear meshes with the second transmission gear and the rotating base of one side of the vibration isolation assembly respectively.

[0013] Preferably, the piezoelectric sensor group includes a piezoelectric sensor base and a first piezoelectric sensor. The piezoelectric sensor base is fixedly connected to the metal base plate. There are two groups of first piezoelectric sensors. The two groups of first piezoelectric sensors are respectively installed on both sides of the piezoelectric sensor base.

[0014] Preferably, both sides of the piezoelectric sensor base are inclined. The two groups of first piezoelectric sensors are respectively connected to the inclined surfaces on both sides of the piezoelectric sensor base. The two groups of first piezoelectric sensors are obliquely arranged under the support of the piezoelectric sensor base.

[0015] Preferably, two groups of dampers are installed on both sides inside the metal base plate. A gap for adjusting the position of the placement tabletop is left between the end of each damper and the placement tabletop.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. The present utility model is provided with a vibration isolation component and a driving part of the vibration isolation component. The vibration isolation spring in the vibration isolation component provides passive vibration isolation. The driving part of the vibration isolation component makes the two driven gears II rotate synchronously by the way that the brushless DC motor drives the transmission gear I to rotate through the driving gear, and the driven gear II drives the rotating base to rotate during the rotation process, so as to complete the adjustment of the position of the vibration isolation spring in the vibration isolation component. By adjusting the position, the active stroke of the vibration isolation spring is changed to obtain different degrees of force feedback, realizing active feedback, so as to provide vibration isolation with six degrees of freedom, high precision and foundation feedback;

[0018] 2. In the present utility model, the vibration isolation spring in the vibration isolation component can undergo slight lateral deformation, so as to obtain the passive vibration isolation effect in the horizontal direction. Brief Description of the Drawings

[0019] Figure 1 is the three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 is the developed sectional structural schematic diagram of the present utility model;

[0021] Figure 3 is the developed structural schematic diagram of the present utility model;

[0022] Figure 4 is the Figure 2 magnified structural schematic diagram at position A in the present utility model.

[0023] The numbers in the figure represent:

[0024] 1. Metal bottom plate; 2. Placing table top; 3. Vibration isolation component; 31. Rotating base; 32. Movable socket; 33. Movable socket limiting rod; 34. Vibration isolation spring; 35. Support part; 4. Driving part of vibration isolation component; 41. Motor seat; 42. Brushless DC motor; 43. Driving gear; 44. Transmission gear I; 45. Driven gear II; 5. Potential monitoring component; 51. Potentiometer seat; 52. Potentiometer; 53. Transmission gear II; 54. Driven gear II; 6. Piezoelectric sensor group; 61. Piezoelectric sensor seat; 62. Piezoelectric sensor I; 7. Piezoelectric sensor II; 8. Damper. Detailed Embodiment

[0025] The following further elaborates the present utility model in combination with the drawings and embodiments on the above-mentioned and other technical features and advantages of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them.

[0026] Embodiment:

[0027] As Figures 1-4 shown, the present utility model provides a table - type active vibration isolation platform, which includes an external PID controller, a metal bottom plate 1, and a placement tabletop 2 covering the upper part of the metal bottom plate 1. There is a movable space between the placement tabletop 2 and the metal bottom plate 1. The lower part of the placement tabletop 2 is of a honeycomb structure. The honeycomb structure at the lower part of the placement tabletop 2 can enhance the structural strength of the placement tabletop 2, thereby reducing the compressive deformation of the placement tabletop 2. An isolation vibration space is formed between the metal bottom plate 1 and the placement tabletop 2. Two groups of vibration isolation components 3 are installed at each of the four corners of the isolation vibration space. A group of vibration isolation component driving parts 4 for adjusting the vibration isolation components 3 are installed between every two groups of vibration isolation components 3. A group of potential monitoring components 5 are installed on one side of each two groups of vibration isolation components 3. A group of piezoelectric sensor groups 6 are installed on both sides of the middle part of the metal bottom plate 1. A group of piezoelectric sensors II 7 are installed on both sides of each piezoelectric sensor group 6. The top of the piezoelectric sensor II 7 abuts against the bottom surface of the placement tabletop 2. The piezoelectric sensor groups 6 and the piezoelectric sensors II 7 are electrically connected to the external PID controller;

[0028] The piezoelectric sensor II 7 generates an electrical signal under the pressure of the placement tabletop 2 and the piezoelectric sensor group 6 generates an electrical signal under lateral polarization. After receiving the electrical signals, the external PID controller sends out feedback signals, and the feedback signals are respectively transmitted to each group of vibration isolation component driving parts 4. After receiving the signals, the vibration isolation component driving parts 4 drive the vibration isolation components 3 to rotate, and the vibration isolation components 3 change the support height of the placement tabletop 2 by rotation.

[0029] The vibration isolation component 3 includes a rotating base 31, a movable socket 32, a movable socket limiting rod 33, a vibration isolation spring 34, and a support part 35;

[0030] The rotating base 31 is installed on the surface of the metal bottom plate 1 through a rotating shaft. The movable socket 32 is thread - connected to the end of the rotating base 31. The movable socket limiting rod 33 is installed on one side of the position where the rotating base 31 is set on the surface of the metal bottom plate 1, and one end of the movable socket 32 is sleeved inside the movable socket limiting rod 33. The movable socket 32 is restricted by the movable socket limiting rod 33. The vibration isolation spring 34 is sleeved on the upper end of the movable socket 32. The support part 35 is sleeved inside the movable socket 32. The other end of the vibration isolation spring 34 abuts against the support part 35 to provide support for the support part 35;

[0031] The vibration isolation component driving part 4 drives the rotating base 31 to rotate. After the rotating base 31 rotates, the movable socket 32 is restricted by the movable socket limiting rod 33. The movable socket 32 moves vertically through the thread - connection with the rotating base 31. After the vertical movement of the movable socket 32, the set position of the vibration isolation spring 34 sleeved inside itself is changed. After the set position of the vibration isolation spring 34 is adjusted, the feedback force provided by the vibration isolation spring 34 under the pressing action of the support part 35 is different, so as to achieve the purpose of active vibration isolation.

[0032] The vibration isolation component driving part 4 includes a motor base 41, a brushless DC motor 42, a driving gear 43, a first transmission gear 44, and a first driven gear 45;

[0033] The motor base 41 is installed at the middle position between two groups of vibration isolation components 3 at the four corners of the surface of the metal base plate 1. The brushless DC motor 42 is installed at the middle position on the top of the motor base 41. The output shaft of the brushless DC motor 42 extends downward into the interior of the motor base 41. The driving gear 43 is installed at the end of the brushless DC motor 42. The first transmission gear 44 is installed on one side of the middle part of the motor base 41 through a rotating shaft. The first transmission gear 44 meshes with the driving gear 43. Two groups of first driven gears 45 are installed. The two groups of first driven gears 45 are arranged at the front end of the motor base 41 through rotating shafts. Both of the two groups of first driven gears 45 are respectively meshed with the driving gear 43 and the rotating bases 31 of the two groups of vibration isolation components 3;

[0034] The brushless DC motor 42 drives the first transmission gear 44 to rotate through the driving gear 43. When the first transmission gear 44 rotates, it synchronously drives the two groups of first driven gears 45 to rotate synchronously. During the rotation process of the first driven gears 45, the rotating bases 31 are driven to rotate, so as to complete the adjustment of the positions of the vibration isolation springs 34 in the vibration isolation components 3 to obtain different degrees of force feedback.

[0035] The potential monitoring component 5 includes a potentiometer base 51, a potentiometer 52, a second transmission gear 53, and a second driven gear 54;

[0036] The potentiometer base 51 is fixed on the surface of the metal base plate 1. The potentiometer 52 is installed in the middle of the potentiometer base 51. The output end of the potentiometer 52 extends downward to the lower part of the potentiometer base 51. The second transmission gear 53 is installed at the output end of the potentiometer 52. The second driven gear 54 is arranged on one side of the potentiometer base 51. The second driven gear 54 is rotationally connected to the metal base plate 1 through a rotating shaft. The second driven gear 54 is respectively meshed with the second transmission gear 53 and the rotating base 31 of one side of the vibration isolation component 3;

[0037] During the rotation process of the rotating base 31, the second driven gear 54 is driven to rotate. The second transmission gear 53 meshed with the second driven gear 54 rotates synchronously. During the rotation process of the second transmission gear 53, the potentiometer 52 is driven to rotate. The rotating potentiometer 52 generates a feedback electrical signal, and the feedback electrical signal is transmitted to an external PID controller.

[0038] The piezoelectric sensor group 6 includes a piezoelectric sensor base 61 and a first piezoelectric sensor 62. The piezoelectric sensor base 61 is fixedly connected to the metal bottom plate 1. There are two sets of the first piezoelectric sensors 62 installed, and the two sets of the first piezoelectric sensors 62 are respectively installed on both sides of the piezoelectric sensor base 61. Both sides of the piezoelectric sensor base 61 are designed to be inclined. The two sets of the first piezoelectric sensors 62 are respectively connected to the inclined surfaces on both sides of the piezoelectric sensor base 61, and the two sets of the first piezoelectric sensors 62 are arranged obliquely under the support of the piezoelectric sensor base 61;

[0039] The two sets of the first piezoelectric sensors 62 are used to sense the axial vibration of the metal bottom plate 1 itself, generate an electrical signal after sensing the vibration, and the electrical signal is transmitted to an external PID controller. After receiving the electrical signal, the external PID controller generates a feedback electrical signal for actively eliminating vibration according to the built-in algorithm, and the feedback electrical signal is transmitted to the vibration isolation component driving part 4, and the vibration isolation component driving part 4 executes the feedback electrical signal.

[0040] The above is only the preferred embodiment of the present invention, which is illustrative rather than restrictive to the present invention. Those skilled in the art understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, but all will fall within the protection scope of the present invention.

Claims

1. Tabletop active vibration isolation platform, characterized in that, It includes an external PID controller, a metal bottom plate, and a storage tabletop covering the upper part of the metal bottom plate. An anti-vibration space is formed between the metal bottom plate and the storage tabletop. Two groups of anti-vibration components are installed at the four corners of the anti-vibration space. A group of anti-vibration component driving parts for adjusting the anti-vibration components are installed between every two groups of the anti-vibration components. A group of potential monitoring components are installed on one side of every two groups of the anti-vibration components. A group of piezoelectric sensor groups are installed on both sides of the middle part of the metal bottom plate. A group of piezoelectric sensors two are installed on both sides of each piezoelectric sensor group. The top of the piezoelectric sensor two abuts against the bottom surface of the storage tabletop. The piezoelectric sensor group and the piezoelectric sensor two are both electrically connected to the external PID controller; The piezoelectric sensor two generates an electrical signal under the pressure of the storage tabletop, and the piezoelectric sensor group generates an electrical signal under lateral polarization. After receiving the electrical signal, the external PID controller issues a feedback signal, and the feedback signal is respectively transmitted to each group of anti-vibration component driving parts. After receiving the signal, the anti-vibration component driving part drives the anti-vibration component to rotate, and the anti-vibration component changes the support height of the storage tabletop by rotating.

2. The tabletop active vibration isolation platform according to claim 1, characterized in that, There is a movable space between the storage tabletop and the metal bottom plate, and the lower part of the storage tabletop is of a honeycomb structure.

3. The table-type active vibration isolation platform according to claim 1, characterized in that, The anti-vibration component includes a rotating base, a movable socket, a movable socket limiting rod, an anti-vibration spring, and a support part. The rotating base is installed on the surface of the metal bottom plate through a rotating shaft. The movable socket is threadedly connected to the end of the rotating base. The movable socket limiting rod is installed on one side of the position where the rotating base is set on the surface of the metal bottom plate, and one end of the movable socket is sleeved inside the movable socket limiting rod. The movable socket is restricted by the movable socket limiting rod. The anti-vibration spring is sleeved on the upper end of the movable socket. The support part is sleeved inside the movable socket. The other end of the anti-vibration spring abuts against the support part to provide support for the support part.

4. The tabletop active vibration isolation platform according to claim 1, wherein The anti-vibration component driving part includes a motor seat, a brushless DC motor, a driving gear, a transmission gear one, and a driven gear one. The motor seat is installed at the middle position between two groups of anti-vibration components at the four corners of the metal bottom plate surface. The brushless DC motor is installed at the middle position on the top of the motor seat. The output shaft of the brushless DC motor extends downward into the motor seat. The driving gear is installed at the end of the brushless DC motor. The transmission gear one is installed at one side of the middle part of the motor seat through a rotating shaft. The transmission gear one meshes with the driving gear. Two groups of driven gears one are installed. The two groups of driven gears one are arranged at the front end of the motor seat through rotating shafts. The two groups of driven gears one are respectively meshed with the driving gear and the rotating bases of the two groups of anti-vibration components.

5. The tabletop active vibration isolation platform according to claim 1, wherein, The potential monitoring component includes a potentiometer seat, a potentiometer, a transmission gear two, and a driven gear two. The potentiometer seat is fixed on the surface of the metal bottom plate. A potentiometer is installed in the middle of the potentiometer seat. The output end of the potentiometer extends downward to the lower part of the potentiometer seat. The transmission gear two is installed at the output end of the potentiometer. The driven gear two is arranged on one side of the potentiometer seat. The driven gear two is rotatably connected to the metal bottom plate through a rotating shaft. The driven gear two is respectively meshed with the transmission gear two and the rotating base of one side of the anti-vibration component.

6. The tabletop active vibration isolation platform according to claim 1, wherein The piezoelectric sensor group includes a piezoelectric sensor base and a first piezoelectric sensor. The piezoelectric sensor base is fixedly connected to the metal bottom plate, and two sets of the first piezoelectric sensors are installed. The two sets of the first piezoelectric sensors are respectively installed on both sides of the piezoelectric sensor base.

7. The tabletop active vibration isolation platform according to claim 6, characterized in that, Both sides of the piezoelectric sensor base are designed to be inclined. The two sets of the first piezoelectric sensors are respectively connected to the inclined surfaces on both sides of the piezoelectric sensor base, and the two sets of the first piezoelectric sensors are arranged obliquely under the support of the piezoelectric sensor base.

8. The tabletop active vibration isolation platform according to claim 1, characterized in that, Two sets of dampers are installed on both inner sides of the metal bottom plate. A gap for adjusting the position of the placement tabletop is left between the end of each set of dampers and the placement tabletop.

Images