Non-contact vacuum pump driving method and device based on centrifugation and magnetic force transmission

Abstract

The invention relates to the technical field of vacuum pumps, and discloses a non-contact vacuum pump driving method and device based on centrifugation and magnetic force transfer, the non-contact vacuum pump driving device comprises a motor, a bottom shell and a pump body, and the output end of the motor is connected with a shaft rod of the pump body through a connecting base; the moving frame is located in the bottom shell and connected with the spring; the outer sides of the magnetic ring and the connecting base are connected with a magnetic assembly, when the motor is not driven, the spring enables the moving frame to be located at the initial position, when the motor is driven, the magnetic assembly is opened under centrifugal force and gets close to the magnetic ring, the magnetic ring is driven by magnetic force to enable the moving frame to move, and at the moment, the sealing cover connected with the moving frame blocks the pressure relief opening of the bottom shell. The motor drives the connecting seat to rotate to generate centrifugal force to enable the magnet to be close to the magnetic ring, the magnetic force of the magnet is utilized to extrude the magnetic ring to achieve transmission and operation without mechanical contact, collision and abrasion between mechanical parts are reduced, then vibration and noise are reduced, the reliability of equipment is improved, the service life of the equipment is prolonged, and operation stability and quietness are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum pumps, and in particular to a contactless vacuum pump driving method and device based on centrifugal and magnetic force transmission. Background Art

[0002] A vacuum pump is a device used to create, improve and maintain a vacuum environment in a specific confined space. Its main function is to reduce the gas pressure in the space to a lower level by extracting gas or steam, thereby forming a state close to a vacuum.

[0003] In traditional vacuum pump devices, mechanical transmission mechanisms are often used to control the opening and closing of sealing components. Although this mechanical transmission method is simple, it is easy to cause wear of components, reduced sealing performance, and increased noise and vibration due to long-term contact friction. In addition, mechanical contact wear will also produce tiny particles, which will cause pollution to some scenes with high cleanliness requirements. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a contactless vacuum pump driving method and device based on centrifugal and magnetic force transmission, which solves the problems in the prior art that traditional vacuum pumps use mechanical transmission mechanisms to control the opening and closing of sealing components, resulting in component wear, reduced sealing performance, noise and vibration.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A contactless vacuum pump driving device based on centrifugal and magnetic force transmission, comprising:

[0006] A motor, a bottom shell and a pump body, wherein the output end of the motor is connected to the shaft of the pump body through a connecting seat, and is used to transmit motor power to operate the pump body and extract the air in the bottom shell through the pump body;

[0007] A moving frame is located in the bottom shell and connected to a spring, wherein the spring is located between the motor and the bottom shell and is used to drive the moving frame to move and reset the moving frame through elastic potential energy;

[0008] The magnetic ring is connected to the moving frame, and a magnetic component is connected to the outer side of the connecting seat. When the motor is not driven, the spring makes the moving frame in the initial position. When the motor is driven, the magnetic component is opened and close to the magnetic ring due to the centrifugal force, and the magnetic ring is driven by the magnetic force to displace the moving frame. At this time, the sealing cover connected to the moving frame blocks the pressure relief port of the bottom shell.

[0009] Preferably, the magnetic assembly includes a bracket one and a bracket two, one side of the bracket two is rotatably connected to the outer wall of the connecting seat, the bracket one is fixedly connected to the bracket two, and a weight block is installed inside the bracket one, and a magnet is installed inside the bracket two.

[0010] Preferably, the cross-section of the bracket 1 and the bracket 2 is set to be L-shaped after being combined, and the bottom shell and the motor are connected by screws.

[0011] Preferably, a cavity is provided inside the bottom shell, an air extraction port is provided outside the bottom shell, and the pressure relief port, the cavity and the air extraction port are connected.

[0012] Preferably, a guide rod is fixed to the inner wall of the bottom shell, a guide hole is opened in the middle of the moving frame, and the guide rod is slidably connected in the guide hole.

[0013] Preferably, the bottom shell is provided with an opening on a side close to the motor, and the connecting seat and the spring are both located in the opening.

[0014] Preferably, the magnetic poles of the magnet and the magnetic ring are the same, a slot is provided on the side of the moving frame close to the spring, one side of the spring is in the slot and the other side is in contact with the motor, and the sealing cover is located outside the pressure relief port.

[0015] Preferably, the magnetic poles of the magnet and the magnetic ring are different, the two sides of the spring are respectively fixed to the inner wall of the slot and the outside of the motor, and the brackets on both sides are close to each other through tension springs, and the sealing cover is located inside the pressure relief port.

[0016] The contactless vacuum pump driving method based on centrifugal and magnetic force transmission includes the following steps, when the magnetic poles of the magnet and the magnetic ring on the adjacent side are the same:

[0017] a. When stationary, the spring lifts up the moving frame, and the moving frame drives the magnetic ring and the sealing cover to move upward. At this time, the sealing cover is separated from the pressure relief port;

[0018] b. Then the driving motor drives the connecting base to rotate, and drives the bracket 1, bracket 2, weight block and magnet to rotate through the connecting base;

[0019] c. The centrifugal force generated by the rotation of the connecting seat causes the bracket 1, bracket 2, weight block and magnet to rotate along the connecting seat as the rotation axis, and also rotate along the connection point between bracket 2 and the connecting seat as the rotation axis. At this time, the weight block and magnet are away from the connecting seat and close to the magnetic ring;

[0020] d. After the magnet approaches the magnetic ring, the principle of like charges repel each other is used to squeeze the magnetic ring without contact;

[0021] e. After the magnetic ring is squeezed, it drives the moving frame and the sealing cover to move downward and compress the spring. At this time, the sealing cover contacts the bottom surface of the inner wall of the bottom shell, thereby blocking the pressure relief port;

[0022] f. After stopping the motor, the magnet loses its centrifugal force, the spring recovers and pushes the magnetic ring upward, while squeezing the magnet in reverse direction to make it close to the connecting seat. At this time, the sealing cover is away from the pressure relief port.

[0023] When the magnetic poles of the magnet and the magnetic ring are different:

[0024] a. When stationary, the spring pulls the moving frame, and the tension spring pulls the two side brackets to move closer to each other and contact the connecting seat. At this time, the moving frame drives the magnetic ring and the sealing cover to move down close to the inner wall of the bottom shell. At this time, the sealing cover is in the pressure relief port, and there is a gap between the sealing cover and the pressure relief port;

[0025] b. Then the driving motor drives the connecting base to rotate, and drives the bracket 1, bracket 2, weight block and magnet to rotate through the connecting base;

[0026] c. The centrifugal force generated by the rotation of the connecting seat causes the bracket 1, bracket 2, weight block and magnet to rotate along the connecting seat as the rotation axis, and also rotate along the connection point between bracket 2 and the connecting seat as the rotation axis. At this time, the tension spring is in a stretched state, and the weight block and magnet are away from the connecting seat and close to the magnetic ring;

[0027] d. After the magnet is close to the magnetic ring, the principle of opposites attract each other is used to pull the magnetic ring without contact;

[0028] e. After the magnetic ring is pulled, it drives the moving frame and the sealing cover to move upward and stretch the spring. At this time, the outer wall of the sealing cover contacts the bottom surface of the inner wall of the bottom shell, thereby blocking the pressure relief port;

[0029] f. After stopping the motor, the magnet loses its centrifugal force, the spring recovers and pulls the magnetic ring downward, and at the same time, the tension spring pulls the magnets on both sides close to the connecting seat at the same time. After the magnet and the magnetic ring move away from each other, the sealing cover then enters the pressure relief port and does not contact the pressure relief port.

[0030] The present invention provides a contactless vacuum pump driving method and device based on centrifugal and magnetic force transmission, which has the following beneficial effects:

[0031] 1. The present invention drives the connecting seat to rotate by a motor to generate centrifugal force to bring the magnet close to the magnetic ring, and utilizes the magnetic force between the magnet and the magnetic ring to squeeze the magnetic ring, so that the device can achieve transmission and operation without mechanical contact, effectively avoiding wear and failure caused by direct contact in traditional mechanical devices. The contactless transmission method can effectively reduce direct collisions between mechanical parts, reduce vibration and noise, greatly improve the reliability and service life of the equipment, and at the same time improve the stability and quietness of the equipment operation.

[0032] 2. The present invention utilizes the interaction between magnetism and centrifugal force to achieve contactless operation. The magnetic force transmission method does not require lubrication or additional maintenance support, has lower requirements for the use environment, greatly reduces the difficulty of operation and the complexity of maintenance, and effectively solves the drawbacks of high maintenance and high cost in traditional mechanical transmission.

[0033] 3. The present invention realizes the opening and closing function of the vacuum pump by utilizing the interaction between the magnet and the magnetic ring, thereby avoiding the reliance on the solenoid valve in the traditional design, greatly reducing the size of the device, reducing the occupied space, and making the equipment more compact. At the same time, the use of the solenoid valve is eliminated, which not only simplifies the structure, but also reduces the installation complexity and maintenance cost.

[0034] 4. The present invention realizes two sealing methods through the magnetic pole configuration of the magnet and the magnetic ring. When the magnetic poles are the same, the repulsion of like charges of the magnets is used to squeeze the magnetic ring, so that the moving frame drives the sealing cover to close the top of the pressure relief port; when the magnetic poles are different, the attraction of opposite charges of the magnet and the magnetic ring pulls the magnetic ring, so that the moving frame drives the sealing cover to seal the inside of the pressure relief port, thereby providing a flexible sealing method to meet the needs of different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0036] Figure 2 This is a disassembled diagram of the bottom shell structure of the present invention;

[0037] Figure 3 It is a partial structural diagram of the sports frame of the present invention;

[0038] Figure 4 It is a partial structural exploded diagram of the weight block of the present invention;

[0039] Figure 5 It is a right side cross-sectional view of a sealing cover according to a first embodiment of the present invention;

[0040] Figure 6 for Figure 5 Schematic diagram of the internal structure of the bottom shell;

[0041] Figure 7 for Figure 5 Schematic diagram of the structure of the magnetic ring part;

[0042] Figure 8 Magnetic pole distribution of embodiment 1 of the present invention Figure 1 :

[0043] Fig. 9 Magnetic pole distribution of embodiment 1 of the present invention Figure 2 ;

[0044] Fig.10 It is a right side cross-sectional view of the sealing cover of the second embodiment of the present invention;

[0045] Fig.11 The magnetic pole distribution of the second embodiment of the present invention is Figure 1 :

[0046] Fig.12 The magnetic pole distribution of the second embodiment of the present invention Figure 2 .

[0047] Among them, 1. Motor; 2. Bottom shell; 3. Pump body; 4. Connecting seat; 5. Bracket 1; 6. Bracket 2; 7. Weight block; 8. Magnet; 9. Moving frame; 10. Spring; 11. Magnetic ring; 12. Sealing cover; 13. Pressure relief port; 14. Guide rod; 15. Guide hole; 16. Screw; 17. Exhaust port; 18. Slot; 19. Opening; 20. Tension spring. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] In order to better understand the present invention, the above contents are described in detail below in conjunction with specific embodiments.

[0050] Embodiment 1

[0051] Please see attached Figure 1-Figure 7 The embodiment of the present invention provides a contactless vacuum pump driving device based on centrifugal and magnetic force transmission, including: a motor 1, a bottom shell 2 and a pump body 3, wherein the output end of the motor 1 is connected to the shaft of the pump body 3 through a connecting seat 4, which is used to transmit the power of the motor 1 to make the pump body 3 operate and to extract the air in the bottom shell 2 through the pump body 3; a moving frame 9, which is located in the bottom shell 2 and is connected to a spring 10, the spring 10 is located between the motor 1 and the bottom shell 2, and is used to drive the moving frame 9 to move through elastic potential energy to reset the moving frame 9; a magnetic ring 11, which is connected to the moving frame 9, and a magnetic component is connected to the outer side of the connecting seat 4. When the motor 1 is not driven, the spring 10 makes the moving frame 9 in an initial position. When the motor 1 is driven, the magnetic component is opened by centrifugal force and approaches the magnetic ring 11, and the magnetic ring 11 is driven by magnetic force to displace the moving frame 9. At this time, the sealing cover 12 connected to the moving frame 9 blocks the pressure relief port 13 of the bottom shell 2.

[0052] In the present invention, the motor 1 is used as a core driving component, and its top is connected to the bottom shell 2. The bottom shell 2 is used as the structural body of the device. The moving frame 9 is supported by the spring 10 at its bottom, and a magnetic ring 11 is installed on the top to achieve synergy with magnetic force transmission. A sealing cover 12 is fixedly installed on one side of the bottom of the moving frame 9. The sealing cover 12 is located above the pressure relief port 13 in a static state.

[0053] When the motor 1 is not driven, the spring 10 is in an extended state, and its reaction force lifts the moving frame 9, so that the moving frame 9 drives the magnetic ring 11 and the sealing cover 12 to move upward, so that the sealing cover 12 is separated from the pressure relief port 13, thereby maintaining the open state of the pressure relief port 13. When the motor 1 is started, the connecting seat 4 transmits the rotational power of the motor 1 to the magnetic component through its position installed at the output end of the motor 1, so that the magnetic component rotates together with the connecting seat 4. As the rotation proceeds, the magnetic component gradually opens, and the magnetic ring 11 is squeezed downward by the magnetic force. In this process, the moving frame 9 moves downward and compresses the spring 10, so that the sealing cover 12 fits the inner wall of the bottom shell 2, and finally the pressure relief port 13 is sealed. Therefore, by utilizing magnetic force to achieve contactless power transmission, mechanical wear is effectively avoided, and efficient sealing is achieved, which significantly improves the service life and operational reliability of the device.

[0054] Please see attached Figure 2-Figure 7 The magnetic assembly includes a bracket 1 5 and a bracket 2 6. One side of the bracket 2 6 is rotatably connected to the outer wall of the connecting seat 4. The bracket 1 5 is fixedly connected to the bracket 2 6. A weight block 7 is installed inside the bracket 1 5. A magnet 8 is installed inside the bracket 2 6. After the bracket 1 5 and the bracket 2 6 are combined, the cross-section is set to be L-shaped. The bottom shell 2 and the motor 1 are connected by screws 16.

[0055] In the present invention, the magnetic assembly is composed of a bracket 1 5 and a bracket 2 6. One side of the bracket 2 6 is rotatably connected to the top of the outer wall of the connecting seat 4 by a hinged manner, so that it can generate rotational motion under the action of centrifugal force. The bottom of the bracket 1 5 is fixedly connected to the top surface of the bracket 2 6, and the two form a stable structural combination for supporting and transmitting rotational motion. A weight block 7 is installed inside the bracket 1 5, which generates an outward opening motion when rotating through centrifugal force; a magnet 8 is installed inside the bracket 2 6, which works together with the magnetic ring 11 on the top of the moving frame 9;

[0056] When the device is running, as the connecting seat 4 rotates, the bracket 1 5 and the bracket 2 6 are gradually spread out under the influence of centrifugal force, and the weight block 7 increases the effect of centrifugal force, so that the bracket 2 6 and the magnet 8 gradually approach the magnetic ring 11. Since the magnetic poles of the magnet 8 and the magnetic ring 11 are the same, the magnet 8 exerts a squeezing effect on the magnetic ring 11 by using the magnetic force of like poles repelling each other, thereby driving the moving frame 9 to move downward, driving the sealing cover 12 to block the pressure relief port 13.

[0057] Please see attached Figure 4-Figure 7 The bottom shell 2 is provided with a cavity inside and an air extraction port 17 outside, and the pressure relief port 13, the cavity and the air extraction port 17 are connected. A guide rod 14 is fixed to the inner wall of the bottom shell 2, a guide hole 15 is opened in the middle of the moving frame 9, and the guide rod 14 is slidably connected in the guide hole 15. An opening 19 is opened on the side of the bottom shell 2 close to the motor 1, and the connecting seat 4 and the spring 10 are both in the opening 19.

[0058] In the present invention, a guide rod 14 is fixedly connected to the bottom surface of the inner wall of the bottom shell 2, and the guide rod 14 passes through a guide hole 15 opened on the outer side of the middle part of the moving frame 9. The two cooperate in a sliding connection, thereby providing a precise guide effect for the moving frame 9 when it moves up and down, preventing the moving frame 9 from deflecting or shaking, and ensuring the stability and sealing accuracy during the movement. Through the cooperation of the card slot 18 and the guide rod 14, the present invention improves the stability of the moving frame 9 while further optimizing the movement trajectory of the sealing cover 12, thereby ensuring the reliability and sealing effect of the vacuum pump;

[0059] An opening 19 is designed in the middle of the bottom of the bottom shell 2 to accommodate the connecting seat 4 and the spring 10, so that part or all of them are in the opening 19. Not only does it effectively save the internal space of the bottom shell 2, but it also ensures the flexible movement of the connecting seat 4 and the spring 10, making the overall structure of the device more compact and efficient. The bottom of the bottom shell 2 is connected to the screw 16 through a threaded structure, and the bottom of the screw 16 is threadedly connected to the top of the motor 1. This connection method ensures the tight fixation between the bottom shell 2 and the motor 1, while providing the flexibility of easy disassembly and assembly, which is convenient for the assembly, maintenance and replacement of parts of the equipment. In addition, the top of the connecting seat 4 is directly connected to the shaft of the pump body 3, ensuring that the power output by the motor 1 is accurately transmitted to the shaft of the pump body 3 through the connecting seat 4, thereby driving the normal operation of the vacuum pump.

[0060] Please see attached Figure 7-Figure 9 The magnetic poles of the magnet 8 and the magnetic ring 11 are the same, a slot 18 is provided on the side of the moving frame 9 close to the spring 10, one side of the spring 10 is in the slot 18, and the other side is in contact with the motor 1, and the sealing cover 12 is located outside the pressure relief port 13.

[0061] In the present invention, the card slot 18 is located at the bottom of the moving frame 9, and is used to stabilize the top of the spring 10, so that the spring 10 can be accurately embedded in the card slot 18, thereby providing a stable supporting force for the moving frame 9 when the spring 10 is extended and retracted. The setting of the spring 10 not only allows the moving frame 9 to be lifted up in a static state to ensure that the sealing cover 12 is separated from the air inlet 13, but also provides a reset function through its elasticity during operation, ensuring that the moving frame 9 can efficiently complete the up and down movement.

[0062] The driving method of the above device comprises the following steps:

[0063] When the magnetic poles of the magnet 8 and the magnetic ring 11 on the adjacent sides are the same:

[0064] a. When stationary, the spring 10 lifts the moving frame 9, and the moving frame 9 drives the magnetic ring 11 and the sealing cover 12 to move upward. At this time, the sealing cover 12 is separated from the pressure relief port 13;

[0065] b. Then the driving motor 1 drives the connecting base 4 to rotate, and the connecting base 4 drives the bracket 1 5, the bracket 2 6, the weight block 7 and the magnet 8 to rotate;

[0066] c. The centrifugal force generated by the rotation of the connecting seat 4 causes the bracket 1 5, the bracket 2 6, the weight block 7 and the magnet 8 to rotate along the connecting seat 4 as the rotation axis, and also rotate along the connection point between the bracket 2 6 and the connecting seat 4 as the rotation axis. At this time, the weight block 7 and the magnet 8 are away from the connecting seat 4 and close to the magnetic ring 11;

[0067] d. After the magnet 8 is close to the magnetic ring 11, the magnetic ring 11 is squeezed contactlessly by using the principle of like charges repelling each other;

[0068] e. After the magnetic ring 11 is squeezed, it drives the moving frame 9 and the sealing cover 12 to move downward and compress the spring 10. At this time, the sealing cover 12 contacts the bottom surface of the inner wall of the bottom shell 2, thereby blocking the pressure relief port 13;

[0069] f. After the motor 1 is stopped, the magnet 8 loses its centrifugal force, the spring 10 recovers and pushes the magnetic ring 11 upward, while squeezing the magnet 8 to reverse and make it close to the connecting seat 4. At this time, the sealing cover 12 is away from the pressure relief port 13.

[0070] Working principle: When in use, when the motor 1 is in a stationary state, that is, when the motor 1 is not driven, the spring 10 is in an extended state, and the reaction force of the spring 10 lifts the moving frame 9, so that the moving frame 9 drives the top magnetic ring 11 and the sealing cover 12 to move upward. At this time, the sealing cover 12 is separated from the pressure relief port 13 on the bottom shell 2, so that the pressure relief port 13 remains in an open state. When the motor 1 is started, the motor 1 drives the connecting seat 4 to rotate through the output end. When the connecting seat 4 rotates, it drives the bracket 1 5, the bracket 2 6, the weight block 7 and the magnet 8 in the magnetic assembly to rotate together, and One side of the bracket 2 6 is connected to the top of the outer wall of the connecting seat 4 by a hinged connection. Therefore, as the connecting seat 4 rotates at a high speed, the centrifugal force causes the bracket 1 5, the bracket 2 6 and the weight block 7 and the magnet 8 inside to rotate along the connecting seat 4 as the rotation axis. At the same time, due to the hinged connection between the bracket 2 6 and the connecting seat 4, the bracket 1 5 and the bracket 2 6 will rotate around the connection point between the connecting seat 4 and the bracket 2 6 as the rotation axis. At this time, the weight block 7 and the magnet 8 are away from the connecting seat 4 and gradually approach the magnetic ring 11 on the top of the moving frame 9. Since the magnetic poles of the magnet 8 and the magnetic ring 11 are close to each other, the weight block 7 and the magnet 8 are moved away from the connecting seat 4. Similarly, the magnetic ring 11 can be squeezed by the effect of like charges repelling each other, so that it drives the moving frame 9 to move downward and compresses the spring 10. At the same time, the guide rod and the guide hole 15 guide the downward movement of the moving frame 9. Under the continuous action of the magnetic force, the moving frame 9 drives the sealing cover 12 at its bottom to move downward, and makes the sealing cover 12 fit the bottom surface of the inner wall of the bottom shell 2, so that the pressure relief port 13 is completely blocked. At this time, the pump body 3 forms a closed system through sealing, and then the gas is allowed to enter the cavity inside the bottom shell 2 through the suction port 17, and finally discharged from the pump body 3, thereby realizing the vacuum pumping function. When the motor 1 stops working, the magnetic assembly stops rotating, the centrifugal force disappears, and the bracket 1 5 and the bracket 2 6 are returned to the initial position by the magnetic force of the magnet 8 and the magnetic ring 11. At this time, the magnet 8 is away from the magnetic ring 11. At the same time, the spring 10 is reset to lift the moving frame 9 again, driving the magnetic ring 11 and the sealing cover 12 to move upward, so that the sealing cover 12 is separated from the pressure relief port 13. At this time, the air relief port 13 is opened, and the one-way valve is installed in the pump body 3. The bottom shell 2 is restored to an open state, and the atmospheric gas from the outside enters the bottom shell 2 from the pressure relief port 12.

[0071] Embodiment 2

[0072] Please see attached Figure 10-12 The magnetic poles of the magnet 8 and the magnetic ring 11 are different. The two sides of the spring 10 are respectively fixed to the inner wall of the slot 18 and the outside of the motor 1, and the two side brackets 5 are close to each other through the tension spring 20, and the sealing cover 12 is located inside the pressure relief port 13.

[0073] The driving method includes the following steps:

[0074] When the magnetic poles of the magnet 8 and the magnetic ring 11 are different:

[0075] a. When stationary, the spring 10 pulls the moving frame 9, and the tension spring 20 pulls the two side brackets 5 to move closer to each other and contact the connecting seat 4. At this time, the moving frame 9 drives the magnetic ring 11 and the sealing cover 12 to move down close to the inner wall of the bottom shell 2. At this time, the sealing cover 12 is in the pressure relief port 13, and there is a gap between the sealing cover 12 and the pressure relief port 13;

[0076] b. Then the driving motor 1 drives the connecting base 4 to rotate, and the connecting base 4 drives the bracket 1 5, the bracket 2 6, the weight block 7 and the magnet 8 to rotate;

[0077] c. The centrifugal force generated by the rotation of the connecting seat 4 causes the bracket 1 5, the bracket 2 6, the weight block 7 and the magnet 8 to rotate along the connecting seat 4 as the rotation axis, and also rotate along the connection point between the bracket 2 6 and the connecting seat 4 as the rotation axis. At this time, the tension spring 20 is in a stretched state, and the weight block 7 and the magnet 8 are away from the connecting seat 4 and close to the magnetic ring 11;

[0078] d. After the magnet 8 is close to the magnetic ring 11, the magnetic ring 11 is pulled contactlessly by utilizing the principle of opposite charges attracting each other;

[0079] e. After the magnetic ring 11 is pulled, it drives the moving frame 9 and the sealing cover 12 to move upward and stretch the spring 10. At this time, the outer wall of the sealing cover 12 contacts the bottom surface of the inner wall of the bottom shell 2, thereby blocking the pressure relief port 13;

[0080] f. After stopping the motor 1, the magnet 8 loses its centrifugal force, the spring 10 recovers and pulls the magnetic ring 11 downward, and at the same time, the tension spring 20 pulls the magnets 8 on both sides close to the connecting seat 4 at the same time. After the magnet 8 and the magnetic ring 11 move away from each other, the sealing cover 12 then enters the pressure relief port 13 without contacting the pressure relief port 13.

[0081] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A contactless vacuum pump driving device based on centrifugal and magnetic force transmission, characterized in that: include: A motor (1), a bottom shell (2) and a pump body (3), wherein the output end of the motor (1) is connected to the shaft of the pump body (3) through a connecting seat (4) for transmitting power from the motor (1) to operate the pump body (3) and to draw air out of the bottom shell (2) through the pump body (3); A moving frame (9) is located in the bottom shell (2) and is connected to a spring (10). The spring (10) is located between the motor (1) and the bottom shell (2) and is used to drive the moving frame (9) to move by elastic potential energy so as to reset the moving frame (9); A magnetic ring (11) is connected to the moving frame (9), and a magnetic component is connected to the outer side of the connecting seat (4). When the motor (1) is not driven, the spring (10) makes the moving frame (9) be in an initial position. When the motor (1) is driven, the magnetic component is opened by centrifugal force and approaches the magnetic ring (11), and the magnetic ring (11) is driven by magnetic force to move the moving frame (9). At this time, the sealing cover (12) connected to the moving frame (9) blocks the pressure relief port (13) of the bottom shell (2).

2. The contactless vacuum pump driving device based on centrifugal and magnetic force transmission according to claim 1 is characterized in that: The magnetic assembly comprises a bracket 1 (5) and a bracket 2 (6), one side of the bracket 2 (6) is rotatably connected to the outer wall of the connecting seat (4), the bracket 1 (5) and the bracket 2 (6) are fixedly connected, and a weight block (7) is installed inside the bracket 1 (5), and a magnet (8) is installed inside the bracket 2 (6).

3. The contactless vacuum pump driving device based on centrifugal and magnetic force transmission according to claim 2 is characterized in that: The cross section of the bracket 1 (5) and the bracket 2 (6) is arranged to be L-shaped after being combined, and the bottom shell (2) and the motor (1) are connected by screws (16).

4. The contactless vacuum pump driving device based on centrifugal and magnetic force transmission according to claim 1 is characterized in that: The bottom shell (2) is provided with a cavity inside and an air extraction port (17) outside, and the pressure relief port (13), the cavity and the air extraction port (17) are connected.

5. The contactless vacuum pump driving device based on centrifugal and magnetic force transmission according to claim 1 is characterized in that: A guide rod (14) is fixed on the inner wall of the bottom shell (2), a guide hole (15) is opened in the middle of the moving frame (9), and the guide rod (14) is slidably connected in the guide hole (15).

6. The contactless vacuum pump driving device based on centrifugal and magnetic force transmission according to claim 1 is characterized in that: The bottom shell (2) is provided with an opening (19) on a side close to the motor (1), and the connecting seat (4) and the spring (10) are both located in the opening (19).

7. The contactless vacuum pump driving device based on centrifugal and magnetic force transmission according to claim 2 is characterized in that: The magnetic poles of the magnet (8) and the magnetic ring (11) are the same on the adjacent sides; a slot (18) is provided on the side of the moving frame (9) close to the spring (10); one side of the spring (10) is in the slot (18) and the other side is in contact with the motor (1); and the sealing cover (12) is located outside the pressure relief port (13).

8. The contactless vacuum pump driving device based on centrifugal and magnetic force transmission according to claim 7 is characterized in that: The magnetic poles of the magnet (8) and the magnetic ring (11) on the adjacent sides are different, the two sides of the spring (10) are respectively fixed to the inner wall of the slot (18) and the outside of the motor (1), and the brackets (5) on both sides are close to each other through tension springs (20), and the sealing cover (12) is located inside the pressure relief port (13).

9. A contactless vacuum pump driving method based on centrifugal and magnetic force transmission, based on a contactless vacuum pump driving device based on centrifugal and magnetic force transmission according to any one of claims 1 to 8, characterized in that: The method comprises the following steps, when the magnetic poles of the magnet (8) and the magnetic ring (11) on the adjacent sides are the same: a. When stationary, the spring (10) lifts the moving frame (9), and the moving frame (9) drives the magnetic ring (11) and the sealing cover (12) to move upward, and at this time the sealing cover (12) is separated from the pressure relief port (13); b. The drive motor (1) then drives the connecting base (4) to rotate, and the connecting base (4) drives the bracket (5), the bracket (6), the weight block (7) and the magnet (8) to rotate; c. The centrifugal force generated by the rotation of the connecting seat (4) causes the bracket 1 (5), the bracket 2 (6), the weight block (7) and the magnet (8) to rotate along the connecting seat (4) as the rotation axis, and also rotate along the connection point between the bracket 2 (6) and the connecting seat (4) as the rotation axis, at which time the weight block (7) and the magnet (8) are away from the connecting seat (4) and close to the magnetic ring (11); d. After the magnet (8) is close to the magnetic ring (11), the magnetic ring (11) is squeezed without contact using the principle of like charges repelling each other; e. After the magnetic ring (11) is squeezed, it drives the moving frame (9) and the sealing cover (12) to move downward and compress the spring (10). At this time, the sealing cover (12) contacts the bottom surface of the inner wall of the bottom shell (2), thereby blocking the pressure relief port (13); f. After the motor (1) is stopped, the magnet (8) loses its centrifugal force, the spring (10) recovers and pushes the magnetic ring (11) upward, while squeezing the magnet (8) in reverse to make it close to the connecting seat (4). At this time, the sealing cover (12) is away from the pressure relief port (13).

10. The contactless vacuum pump driving method based on centrifugal and magnetic force transmission according to claim 9, characterized in that: When the magnetic poles of the magnet (8) and the magnetic ring (11) on the adjacent sides are different: a. When stationary, the spring (10) pulls the moving frame (9), and the tension spring (20) pulls the two side brackets (5) closer to each other and in contact with the connecting seat (4). At this time, the moving frame (9) drives the magnetic ring (11) and the sealing cover (12) to move down close to the inner wall of the bottom shell (2). At this time, the sealing cover (12) is in the pressure relief port (13), and there is a gap between the sealing cover (12) and the pressure relief port (13); b. The drive motor (1) then drives the connecting base (4) to rotate, and the connecting base (4) drives the bracket (5), the bracket (6), the weight block (7) and the magnet (8) to rotate; c. The centrifugal force generated by the rotation of the connecting seat (4) causes the bracket 1 (5), the bracket 2 (6), the weight block (7) and the magnet (8) to rotate along the connecting seat (4) as the rotation axis, and also rotate along the connection point between the bracket 2 (6) and the connecting seat (4) as the rotation axis. At this time, the tension spring (20) is in a stretched state, and the weight block (7) and the magnet (8) are both away from the connecting seat (4) and close to the magnetic ring (11); d. After the magnet (8) is close to the magnetic ring (11), the magnetic ring (11) is pulled contactlessly by utilizing the principle of opposites attracting each other; e. After the magnetic ring (11) is pulled, it drives the moving frame (9) and the sealing cover (12) to move upward and stretch the spring (10). At this time, the outer wall of the sealing cover (12) contacts the bottom surface of the inner wall of the bottom shell (2), thereby blocking the pressure relief port (13); f. After the motor (1) is stopped, the magnet (8) loses its centrifugal force, the spring (10) recovers and pulls the magnetic ring (11) downward, and at the same time, the tension spring (20) pulls the magnets (8) on both sides close to the connecting seat (4). After the magnet (8) and the magnetic ring (11) move away from each other, the sealing cover (12) then enters the pressure relief port (13) without contacting the pressure relief port (13).

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