High-stability low-noise uniform mixing oscillator

Abstract

The invention provides a high-stability low-noise uniform mixing oscillator. The high-stability low-noise uniform mixing oscillator comprises an oscillation platform and a base unit, the bottom surface of the oscillation platform is provided with three ball bearing surfaces which are distributed along the circumference in an array manner and at least three magnetic columns which vertically extend downwards, and the magnetic columns are sleeved with rolling bearings; a lower base body of the base unit is provided with three concave ball containing holes and at least three concave polarization track groove holes, balls are arranged in the ball containing holes, first elastic rings are arranged in the middles of the inner walls of the ball containing holes, and second elastic rings are arranged on the inner walls of the polarization track groove holes. The oscillation platform is supported through three balls with the same height, the three points form a stable supporting face, under the non-contact magnetic attraction effect, the oscillation platform can still be kept on the same plane during high-frequency oscillation, and the operation stability is improved; during oscillation, the column body of the magnetic column is firstly buffered by the contact between the elastic ring and the rolling bearing, and then the column body of the magnetic column is contacted with the inner wall of the polarization track groove hole, so that the noise during high-frequency oscillation can be obviously reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sample liquid mixing, in particular to a high-stability and low-noise mixing oscillator. Background Art

[0002] Oscillators are commonly used equipment in laboratories and are widely used in biology, chemistry, medicine and other fields to achieve rapid mixing and oscillation of samples. The working principle of the oscillator is mainly based on the action of rotation or oscillation. The electric drive causes the sample in the container to produce a strong eddy current motion or reciprocating motion, thereby achieving rapid mixing and oscillation of the sample. The vortex mixing oscillator uses the principle of eccentric rotation to generate a strong eddy current motion of the liquid in the container through the driving device, thereby achieving rapid mixing of the sample. It is suitable for mixing small volume samples.

[0003] The existing mixing oscillator has a relatively high operating noise. The main reasons are: first, the support of the oscillation platform is not stable; second, there is a hard contact between the limit column and the track groove. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a high-stability and low-noise mixing oscillator.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention to solve the technical problem is: a high-stability low-noise mixing oscillator, comprising:

[0006] An oscillating platform, the upper surface of which is used to place the sample well plate, the bottom surface of the oscillating platform is provided with three ball bearing surfaces distributed in a circumferential array, the bottom surface of the oscillating platform is also provided with at least three magnetic columns extending vertically downward, the magnetic columns are sleeved with rolling bearings, and the bottom of the magnetic columns is installed with an upper magnet;

[0007] The base unit comprises a lower seat body, wherein a polarization driving mechanism is provided in the middle of the lower seat body; three concave ball receiving holes are provided on the upper surface of the lower seat body, balls are arranged in the ball receiving holes, the top of the balls are in contact with the ball supporting surface of the oscillating platform, a first elastic ring is provided in the middle of the inner wall of the ball receiving hole, and the height position of the first elastic ring matches the height of the center of the ball; at least three concave polarization track slots are also provided on the upper surface of the lower seat body, a lower magnet is provided at the bottom of the polarization track slot, the magnetic column extends downward into the polarization track slot, the upper magnet and the lower magnet attract each other, the bottom surface of the magnetic column is in a non-contact state with the bottom surface of the polarization track slot, and a second elastic ring is provided on the inner wall of the polarization track slot, and the height position of the second elastic ring matches the rolling bearing on the magnetic column.

[0008] The oscillation platform of the present invention is supported by three balls of the same height, and the three points form a stable supporting surface. Under the non-contact magnetic attraction, the oscillation platform can still remain in the same plane during high-frequency oscillation, thereby improving the running stability. During oscillation, the column body of the magnetic column is firstly buffered by the contact between the elastic ring and the rolling bearing, and then the column body of the magnetic column contacts the inner wall of the polarization track slot, which can significantly reduce the noise during high-frequency oscillation.

[0009] Furthermore, the ball bearing surface is provided with an upper wear-resistant ceramic sheet.

[0010] Furthermore, a lower wear-resistant ceramic sheet is provided on the bottom surface of the ball accommodating hole.

[0011] Furthermore, the ball is a nylon ball.

[0012] By adopting the above preferred solution, the service life of the ball and its supporting structure is increased.

[0013] Furthermore, the magnetic column includes a connecting piece, a rolling bearing, a copper column and an upper magnet. The connecting piece is fixedly connected to the bottom surface of the oscillation platform, the rolling bearing is sleeved in the middle of the connecting piece, the copper column is fixedly connected to the bottom end of the connecting piece, and the upper magnet is embedded in the bottom end of the copper column.

[0014] Furthermore, the rolling bearing is coaxially arranged with the copper column, the outer diameter of the copper column is larger than the outer diameter of the rolling bearing, the difference between the outer diameter of the copper column and the outer diameter of the rolling bearing is a; the protrusion of the inner ring of the second elastic ring in a free state from the inner wall of the polarization track slot is b, then b>a / 2+0.5mm.

[0015] Furthermore, 0.1mm≤a≤1mm.

[0016] By adopting the above preferred solution, the shock absorbing and buffering effect of the elastic ring on the operation of the magnetic suction column and the hard supporting effect of the copper column and the inner wall of the polarization track slot are taken into account, thereby ensuring the stable operation of the oscillator and prolonging its service life.

[0017] Furthermore, the polarization drive mechanism includes a motor, an eccentric shaft and a balancing block. The lower end of the eccentric shaft is connected to the motor output shaft, and the balancing block is connected to the eccentric shaft. The top and lower ends of the eccentric shaft are eccentrically arranged. The top end of the eccentric shaft is docked and installed with the middle hole on the bottom surface of the oscillation platform via a bearing, and the eccentric shaft and the oscillation platform have upward and downward freedom of movement.

[0018] By adopting the above preferred solution, the centrifugal force of the oscillation platform is offset by the balancing block, thereby ensuring the operational stability of the oscillator.

[0019] Furthermore, an electromagnetic magnet assembly is provided in the lower seat body, and the electromagnetic magnet assembly drives the positioning push rod to telescopically move. The balance block includes a fan-shaped portion and an annular portion connected to the fan-shaped portion. A concave positioning port is provided on the side of the annular portion, and the positioning push rod is engaged with the positioning port after being extended.

[0020] By adopting the above preferred solution, the position of the polarization axis balance block is limited by the electromagnetic magnet assembly before the oscillation platform stops, so that the oscillation platform can stop at the same position, which facilitates the mechanical gripper in the automated experimental platform to accurately grasp the orifice plate on the oscillation platform.

[0021] Furthermore, arc-shaped guide surfaces are provided on both sides of the opening of the positioning opening.

[0022] By adopting the above preferred solution, the smoothness of the positioning push rod of the electromagnetic magnet assembly entering the positioning port is improved.

[0023] Furthermore, a fan-shaped counterweight plate is detachably connected to the top of the fan-shaped portion of the balance weight.

[0024] The above preferred solution is adopted to facilitate the weight adjustment of the balancing block.

[0025] Furthermore, the electromagnetic magnet assembly includes a base, an electromagnetic magnet body, a positioning push rod, a limit block, a sleeve, a retaining ring and a return spring. The base is fixedly connected to the lower seat body, the electromagnetic magnet body and the limit block are both fixedly connected to the base, the positioning push rod passes through the electromagnetic magnet body and the limit block, the sleeve is sleeved on the front end of the positioning push rod, the sleeve is located on the front side of the limit block, the retaining ring is clamped on the tail end of the positioning push rod, and the return spring is located between the retaining ring and the rear end face of the electromagnetic magnet body.

[0026] By adopting the above preferred solution, the structural stability of the electromagnetic magnet assembly is improved, and the response speed to the positioning of the balance block is increased.

[0027] Furthermore, the oscillating platform is also provided with an adaptive orifice plate clamping mechanism for clamping the orifice plate, and the adaptive orifice plate clamping mechanism includes a turntable, a first angle code linkage mechanism, a second angle code linkage mechanism and an opening and closing drive mechanism;

[0028] The turntable is rotatably mounted at the middle position of the bottom surface of the oscillating platform;

[0029] The first angle code linkage mechanism includes a first angle code, a first slide rail assembly and a first connecting rod. The upper surface of the first angle code is provided with a first regulating rod and a second regulating rod vertically arranged. The first regulating rod and the second regulating rod are used to regulate the first long side and the first short side of the orifice plate respectively. The first slide rail assembly includes a first slide and a first slide rail. The first slide rail is fixedly connected to the bottom surface of the oscillating platform. The first slide rail is arranged at 45 degrees to the edge line of the oscillating platform. The bottom of the first angle code is fixedly connected to the first slide. One end of the first connecting rod is hinged to the first slide, and the other end of the first connecting rod is hinged to the turntable.

[0030] The second angle code linkage mechanism includes a second angle code, a second slide rail assembly and a second connecting rod. The upper surface of the second angle code is provided with a third regulating rod and a fourth regulating rod arranged vertically. The third regulating rod and the fourth regulating rod are used to regulate the second long side and the second short side of the orifice plate respectively. The second slide rail assembly includes a second slide and a second slide rail. The second slide rail is fixedly connected to the bottom surface of the oscillating platform. The second slide rail is arranged at 45 degrees to the edge line of the oscillating platform. The bottom of the second angle code is fixedly connected to the second slide. One end of the second connecting rod is hinged to the second slide, and the other end of the second connecting rod is hinged to the turntable.

[0031] The opening and closing drive mechanism includes a third connecting rod, a pulling magnetic block, a fixed magnetic seat, a third slide rail assembly, a handle and a tension spring. The third slide rail assembly includes a third slide and a third slide rail. The third slide rail is fixedly installed on the bottom surface of the oscillation platform. The third slide rail is arranged parallel to the short side line of the oscillation platform. The fixed magnetic seat is fixedly connected to the bottom surface of the oscillation platform. Magnets are provided in the fixed magnetic seat and the pulling magnetic block. One end of the third connecting rod is hinged to the turntable, and the other end of the third connecting rod is connected to one end of the pulling magnetic block. The other end of the pulling magnetic block is hinged to the third slide. The handle is fixedly connected to the third slide, and the tension spring is connected between the third slide and the oscillation platform.

[0032] By adopting the above preferred scheme, the orifice plate is clamped by using the openable and closable first angle code and the second angle code. Compared with the fixed clamping method, the clamping force is stable, the influence of the manufacturing error of different orifice plate sizes on the clamping force can be eliminated, and the orifice plate can be easily taken and placed.

[0033] Furthermore, a protruding push shaft is provided on the magnetic pulling block, and a push mechanism is provided in the oscillator base unit, and the push mechanism is used to apply a driving force to the push shaft to force the magnetic pulling block to move away from the fixed magnetic suction seat.

[0034] Furthermore, a rotatable sleeve is provided on the outer periphery of the push shaft.

[0035] Furthermore, the pushing mechanism includes a servo and a swing arm, the servo is fixedly installed in the oscillator base unit, and the swing arm is installed on the rotating shaft of the servo. The swing of the swing arm pushes the pulling magnetic block, thereby realizing the opening of the first angle code and the second angle code.

[0036] By adopting the above preferred solution, the automatic opening and closing of the orifice plate clamping mechanism can be realized through the steering gear, and can be organically integrated into the automated experimental platform.

[0037] Furthermore, the engaging surfaces of the fixed magnetic seat and the pulling magnetic block are perpendicular to the length direction of the third slide rail.

[0038] By adopting the above preferred solution, the suction force is improved to ensure a stable clamping force on the orifice plate.

[0039] Furthermore, a handle sliding opening for the handle to extend out is provided on one side of the oscillation platform, and a shielding guard plate is connected to the third slide, and the shielding guard plate is used to shield the handle sliding opening when the tension spring drives the handle to reset.

[0040] The above preferred solution is adopted to prevent hands from being pinched during operation and improve safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a structural schematic diagram of an implementation mode of the present invention.

[0043] Figure 2 is a cross-sectional view of an embodiment of the present invention.

[0044] Figure 3 It is a schematic diagram of the structure of the base unit.

[0045] Figure 4 is a top view of the base unit.

[0046] Figure 5 is a cross-sectional view of the base unit.

[0047] Figure 6 It is a structural schematic diagram of the oscillation platform.

[0048] Figure 7 It is a schematic diagram of the back side of the oscillation platform.

[0049] Figure 8is a cross-sectional view of the oscillating platform.

[0050] Fig. 9 It is a schematic diagram of the back structure of the oscillation platform.

[0051] Fig.10 is a bottom view of the oscillating platform.

[0052] Fig.11 It is a structural schematic diagram of the electromagnetic magnet assembly.

[0053] Fig.12 It is a structural diagram of the balancing block.

[0054] Fig.13 It is a partial schematic diagram of another implementation method at the polarization track slot.

[0055] The numbers and letters in the figure represent the names of the corresponding parts:

[0056] 10-oscillation platform; 11-ball bearing surface; 111-upper wear-resistant ceramic sheet; 12-magnetic column; 121-connector; 122-rolling bearing; 123-copper column; 124-upper magnet;

[0057] 20-adaptive orifice plate clamping mechanism; 21-turntable; 22-first angle code linkage mechanism; 221-first angle code; 222-first regulation rod; 223-second regulation rod; 224-first slide; 225-first slide rail; 226-first connecting rod; 23-second angle code linkage mechanism; 231-second angle code; 232-third regulation rod; 233-fourth regulation rod; 234-second slide; 235- Second slide rail; 236-second connecting rod; 24-opening and closing drive mechanism; 241-third connecting rod; 242-magnetic block; 2421-push shaft; 2422-swivel sleeve; 243-fixed magnetic seat; 244-third slide; 245-third slide rail; 246-handle; 247-tension spring; 248-handle sliding opening; 249-shielding guard plate; 25-pushing mechanism; 251-servo; 252-swing arm;

[0058] 30-base unit; 31-polarization drive mechanism; 311-motor; 312-eccentric shaft; 313-balance block; 3131-sector; 3132-ring; 3133-positioning port; 3134-arc-shaped guide surface; 3135-sector-shaped counterweight; 32-ball receiving hole; 321-ball; 322-first elastic ring; 323-lower wear-resistant ceramic plate; 33-polarization track slot; 331-lower magnet; 332-second elastic ring; 333-movable sleeve; 334-limiting groove; 335-elastic top screw; 337-motor mounting bracket; 338-linear motor; 34-electromagnetic magnet assembly; 341-base; 342-electromagnetic magnet body; 343-positioning push rod; 344-limiting block; 345-sleeve; 346-retaining ring. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments 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.

[0060] like Figure 1-12 As shown, a high-stability low-noise mixing oscillator comprises:

[0061] The oscillating platform 10 has an upper surface for placing a sample well plate, and the bottom surface of the oscillating platform 10 is provided with three ball bearing surfaces 11 distributed in a circumferential array, and the bottom surface of the oscillating platform 10 is also provided with at least three magnetic columns 12 extending vertically downward, and rolling bearings 122 are sleeved on the magnetic columns 12, and an upper magnet 124 is installed at the bottom of the magnetic columns 12;

[0062] The base unit 30 includes a lower seat body, a polarization driving mechanism 31 is provided in the middle of the lower seat body; three concave ball receiving holes 32 are provided on the upper surface of the lower seat body, and balls 321 are provided in the ball receiving holes 32. The top of the ball 321 contacts the ball bearing surface 11 of the oscillating platform, and a first elastic ring 322 is provided in the middle of the inner wall of the ball receiving hole 32. The height position of the first elastic ring 322 matches the height of the center of the ball 321; at least three concave polarization track slots 33 are also provided on the upper surface of the lower seat body, and a lower magnet 331 is provided at the bottom of the polarization track slot 33. The magnetic column 12 extends downward into the polarization track slot 33, the upper magnet 124 and the lower magnet 331 attract each other, and the bottom surface of the magnetic column 12 is in a non-contact state with the bottom surface of the polarization track slot 33. A second elastic ring 332 is provided on the inner wall of the polarization track slot 33, and the height position of the second elastic ring 332 matches the rolling bearing 122 on the magnetic column.

[0063] The beneficial effects of adopting the above technical solution are: the oscillation platform is supported by three balls of the same height, and the three points form a stable supporting surface. Under the action of non-contact magnetic attraction, the oscillation platform can still remain in the same plane during high-frequency oscillation, thereby improving the running stability; during oscillation, the column body of the magnetic column is first buffered by the contact between the elastic ring and the rolling bearing, and after the elastic ring is compressed to a certain extent, the column body of the magnetic column contacts the inner wall of the polarization track slot, which can significantly reduce the noise during high-frequency oscillation.

[0064] In other embodiments of the present invention, the ball bearing surface 11 is provided with an upper wear-resistant ceramic sheet 111. The bottom surface of the ball receiving hole 32 is provided with a lower wear-resistant ceramic sheet 323. The ball 321 is a nylon ball. The beneficial effect of adopting the above technical solution is: the service life of the ball and its supporting structure is improved.

[0065] In some other embodiments of the present invention, the magnetic column 12 includes a connecting member 121, a rolling bearing 122, a copper column 123 and an upper magnet 124. The connecting member 121 is fixedly connected to the bottom surface of the oscillation platform 10, the rolling bearing 122 is sleeved in the middle of the connecting member 121, the copper column 123 is fixedly connected to the bottom end of the connecting member 121, and the upper magnet 124 is embedded in the bottom end of the copper column 123.

[0066] In other embodiments of the present invention, the rolling bearing 122 is coaxially arranged with the copper column 123, and the outer diameter of the copper column 123 is larger than the outer diameter of the rolling bearing 122. The difference between the outer diameter of the copper column 123 and the outer diameter of the rolling bearing 122 is a; the protrusion of the inner ring of the second elastic ring 332 from the inner wall of the polarization track slot 33 in the free state is b, then b>a / 2+0.5mm; 0.1mm≤a≤1mm. The beneficial effect of adopting the above technical solution is: taking into account the shock-absorbing and buffering effect of the elastic ring on the operation of the magnetic suction column and the hard support effect of the copper column and the inner wall of the polarization track slot, ensuring the stable operation of the oscillator and improving the service life.

[0067] like Fig.13As shown, in other embodiments of the present invention, a linear motor 338 for driving the lower magnet 331 to move up and down is installed below the lower magnet 331, the top of the lifting shaft of the linear motor 338 is connected to the lower magnet 331, and the base of the linear motor 338 is fixedly mounted on the motor mounting frame 337. By adjusting the spacing between the upper magnet 124 and the lower magnet 331, a suitable magnetic attraction can be provided to ensure smooth operation. Initially, the magnet spacing is a preset value. When the usage scenario changes, the magnet spacing can be adjusted by controlling the linear motor 338 to adjust the suction force. For example, the spacing can be reduced to increase the suction force to ensure smooth operation under a larger load and a higher speed; increasing the spacing to reduce the suction force can extend the life while ensuring the current usage scenario. When the oscillation platform needs to be removed, the lower magnet is driven to the bottom by the linear motor 338, and the oscillation platform is out of the suction range at this time and can be easily removed.

[0068] like Fig.13 As shown, in other embodiments of the present invention, after the second elastic ring 322 reaches the end of its service life, in order to quickly replace the second elastic ring to maintain the low-noise use experience of the oscillator, a movable sleeve 333 is provided on the upper part of the polarization track slot 33, and a plurality of second elastic rings 332 are installed at intervals on the inner wall of the movable sleeve 333, and a plurality of limiting grooves 334 are installed at intervals on the outer wall of the movable sleeve. A plurality of elastic top screws 335 at the same level are also installed on the wall of the polarization track slot 33. When the elastic top screw 335 matches with a limiting groove 334, a corresponding second elastic ring 332 corresponds to the rolling bearing position of the magnetic column, and only one second elastic ring 332 matches with the rolling bearing, and the other second elastic rings 332 are located above and below the rolling bearing position. In this way, initially, the rolling bearing of the magnetic column contacts the second elastic ring 332 at the bottom. After reaching the service life, you only need to take out the oscillation platform and press the movable sleeve 333 down with force. After the elastic top screw 335 cooperates with the next limit groove, the next unused second elastic ring 332 cooperates with the rolling bearing to restore the noise reduction effect, facilitate maintenance, and significantly improve the service life.

[0069] In other embodiments of the present invention, the polarization drive mechanism 31 includes a motor 311, an eccentric shaft 312 and a balancing block 313, the lower end of the eccentric shaft 312 is connected to the output shaft of the motor 311, the balancing block 313 is connected to the eccentric shaft 312, the top and the lower end of the eccentric shaft 312 are eccentrically arranged, the top of the eccentric shaft 312 is docked and installed with the middle hole of the bottom surface of the oscillation platform 10 through a bearing, and the eccentric shaft 312 has a vertical freedom of movement with the middle hole of the bottom surface of the oscillation platform 10. The beneficial effect of adopting the above technical solution is: the centrifugal force of the oscillation platform is offset by the balancing block to ensure the operation stability of the oscillator.

[0070] In some other embodiments of the present invention, an electromagnetic magnet assembly 34 is provided in the lower seat body of the base unit 30, and the electromagnetic magnet assembly 34 drives the positioning top rod 343 to telescopically move, and the balance block 313 includes a fan-shaped portion 3131 and an annular portion 3132 connected to the fan-shaped portion, and a concave positioning port 3133 is provided on the side of the annular portion 3132, and the positioning top rod 343 is engaged with the positioning port 3133 after being extended. The beneficial effect of adopting the above technical solution is that before the oscillation platform stops, the position of the polarization axis balance block is limited by the electromagnetic magnet assembly, so that the oscillation platform can stop at the same position, which is convenient for the mechanical gripper in the automated experimental platform to accurately grasp the orifice plate on the oscillation platform.

[0071] In some other embodiments of the present invention, arc-shaped guide surfaces 3134 are provided on both sides of the opening of the positioning opening 3133. The beneficial effect of adopting the above technical solution is to improve the smoothness of the positioning push rod of the electromagnetic magnet assembly entering the positioning opening.

[0072] In some other embodiments of the present invention, the top of the balancing block sector 3131 is detachably connected to a sector-shaped counterweight plate 3135. The beneficial effect of adopting the above technical solution is that it is convenient to adjust the counterweight of the balancing block.

[0073] In other embodiments of the present invention, the electromagnetic magnet assembly 34 includes a base 341, an electromagnetic magnet body 342, a positioning push rod 343, a limit block 344, a sleeve 345, a snap ring 346 and a reset spring. The base 341 is fixedly connected to the lower base of the base unit 30, the electromagnetic magnet body 342 and the limit block 344 are both fixedly connected to the base 341, the positioning push rod 343 runs through the electromagnetic magnet body 342 and the limit block 344, the sleeve 345 is sleeved on the front end of the positioning push rod 343, the sleeve 345 is located on the front side of the limit block 344, the snap ring 346 is clamped on the tail end of the positioning push rod 343, and the reset spring is located between the snap ring 346 and the rear end face of the electromagnetic magnet body 342. The beneficial effects of adopting the above technical solution are: improving the structural stability of the electromagnetic magnet assembly and improving the response speed to the positioning of the balance block.

[0074] In some other embodiments of the present invention, the oscillating platform 10 is further provided with an adaptive orifice plate clamping mechanism 20 for clamping the orifice plate, and the adaptive orifice plate clamping mechanism 20 includes a turntable 21, a first angle code linkage mechanism 22, a second angle code linkage mechanism 23 and an opening and closing drive mechanism 24;

[0075] The turntable 21 is rotatably mounted at the middle position of the bottom surface of the oscillating platform 10;

[0076] The first angle code linkage mechanism 22 includes a first angle code 221, a first slide rail assembly and a first connecting rod 226. The upper surface of the first angle code 221 is provided with a first regulating rod 222 and a second regulating rod 223 which are vertically arranged. The first regulating rod 222 and the second regulating rod 223 are used to regulate the first long side and the first short side of the orifice plate respectively. The first slide rail assembly includes a first slide 224 and a first slide rail 225. The first slide rail 225 is fixedly connected to the bottom surface of the oscillating platform 10. The first slide rail 225 is arranged at 45 degrees to the edge line of the oscillating platform. The bottom of the first angle code 221 is fixedly connected to the first slide 224. One end of the first connecting rod 226 is hinged to the first slide 224, and the other end of the first connecting rod 226 is hinged to the turntable 21.

[0077] The second angle code linkage mechanism 23 includes a second angle code 231, a second slide rail assembly and a second connecting rod 236. The upper surface of the second angle code 231 is provided with a third regulating rod 232 and a fourth regulating rod 233 which are vertically arranged. The third regulating rod 232 and the fourth regulating rod 233 are used to regulate the second long side and the second short side of the orifice plate respectively. The second slide rail assembly includes a second slide 234 and a second slide rail 235. The second slide rail 235 is fixedly connected to the bottom surface of the oscillating platform 10. The second slide rail 235 is arranged at 45 degrees to the edge line of the oscillating platform. The bottom of the second angle code 231 is fixedly connected to the second slide 234. One end of the second connecting rod 236 is hinged to the second slide 234, and the other end of the second connecting rod 236 is hinged to the turntable 21.

[0078] The opening and closing drive mechanism 24 includes a third connecting rod 241, a magnetic pull block 242, a fixed magnetic seat 234, a third slide rail assembly, a handle 246 and a tension spring 247. The third slide rail assembly includes a third slide 244 and a third slide rail 245. The third slide rail 245 is fixedly installed on the bottom surface of the oscillation platform 10. The third slide rail 245 is arranged parallel to the short side line of the oscillation platform 10. The fixed magnetic seat 234 is fixedly connected to the bottom surface of the oscillation platform 10. Magnets are provided in the fixed magnetic seat 234 and the magnetic pull block 242. One end of the third connecting rod 241 is hinged to the turntable 21, and the other end of the third connecting rod 241 is connected to one end of the magnetic pull block 242. The other end of the magnetic pull block 242 is hinged to the third slide 244. The handle 246 is fixedly connected to the third slide 244, and the tension spring 247 is connected between the third slide 244 and the oscillation platform 10. The beneficial effect of adopting the above technical solution is: the orifice plate is clamped by using the openable and closable first angle code and the second angle code. Compared with the fixed clamping method, the clamping force is stable, the influence of the manufacturing error of different orifice plate sizes on the clamping force can be eliminated, and the orifice plate can be easily taken and placed.

[0079] In other embodiments of the present invention, a protruding push shaft 2421 is provided on the pull magnetic block 242, and a push mechanism 25 is provided in the oscillator base unit, and the push mechanism 25 is used to apply a driving force to the push shaft 2421 to urge the pull magnetic block 242 to move away from the fixed magnetic seat 234. A rotatable sleeve 2422 is sleeved on the outer periphery of the push shaft 2421. The push mechanism 25 includes a steering gear 251 and a swing arm 252. The steering gear 251 is fixedly installed in the oscillator base unit 30, and the swing arm 252 is installed on the rotating shaft of the steering gear 251. The swing arm 252 is used to push the pull magnetic block 242, thereby realizing the opening of the first angle code 221 and the second angle code 231. The beneficial effect of adopting the above technical solution is that the automatic opening and closing of the orifice plate clamping mechanism can be realized by the steering gear, and it can be organically integrated into the automated experimental platform.

[0080] In other embodiments of the present invention, the suction surfaces of the fixed magnetic seat 243 and the magnetic pull block 242 are perpendicular to the length direction of the third slide rail 245. The beneficial effect of adopting the above technical solution is: improving the suction force and ensuring a stable clamping force on the orifice plate.

[0081] In other embodiments of the present invention, a handle sliding opening 248 for the handle 246 to extend is provided on one side of the oscillation platform 10, and a shielding guard plate 249 is connected to the third slide 244. The shielding guard plate 249 is used to shield the handle sliding opening 248 when the tension spring 247 drives the handle to reset. The beneficial effect of adopting the above technical solution is: preventing the hand from being pinched during operation and improving the safety performance.

[0082] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-stability, low-noise mixing oscillator, characterized in that: include: An oscillating platform, the upper surface of which is used to place the sample well plate, the bottom surface of the oscillating platform is provided with three ball bearing surfaces distributed in a circumferential array, the bottom surface of the oscillating platform is also provided with at least three magnetic columns extending vertically downward, the magnetic columns are sleeved with rolling bearings, and the bottom of the magnetic columns is installed with an upper magnet; The base unit comprises a lower seat body, wherein a polarization driving mechanism is provided in the middle of the lower seat body; three concave ball receiving holes are provided on the upper surface of the lower seat body, balls are arranged in the ball receiving holes, the top of the balls are in contact with the ball supporting surface of the oscillating platform, a first elastic ring is provided in the middle of the inner wall of the ball receiving hole, and the height position of the first elastic ring matches the height of the center of the ball; at least three concave polarization track slots are also provided on the upper surface of the lower seat body, a lower magnet is provided at the bottom of the polarization track slot, the magnetic column extends downward into the polarization track slot, the upper magnet and the lower magnet attract each other, the bottom surface of the magnetic column is in a non-contact state with the bottom surface of the polarization track slot, and a second elastic ring is provided on the inner wall of the polarization track slot, and the height position of the second elastic ring matches the rolling bearing on the magnetic column.

2. The high-stability low-noise mixing oscillator according to claim 1, characterized in that: The ball bearing surface is provided with an upper wear-resistant ceramic sheet; the bottom surface of the ball accommodating hole is provided with a lower wear-resistant ceramic sheet; and the ball is a nylon ball.

3. The high-stability low-noise mixing oscillator according to claim 1, characterized in that: The magnetic column includes a connecting piece, a rolling bearing, a copper column and an upper magnet. The connecting piece is fixedly connected to the bottom surface of the oscillation platform, the rolling bearing is sleeved in the middle of the connecting piece, the copper column is fixedly connected to the bottom end of the connecting piece, and the upper magnet is embedded in the bottom end of the copper column; the rolling bearing is coaxially arranged with the copper column, and the outer diameter of the copper column is larger than the outer diameter of the rolling bearing.

4. The high-stability low-noise mixing oscillator according to claim 3, characterized in that: The difference between the outer diameter of the copper column and the outer diameter of the rolling bearing is a, 0.1mm≤a≤1mm; the protrusion of the inner ring of the second elastic ring in a free state from the inner wall of the polarization track slot is b, then b>a / 2+0.5mm.

5. The high-stability low-noise mixing oscillator according to claim 1, characterized in that: The polarization driving mechanism includes a motor, an eccentric shaft and a balancing block. The lower end of the eccentric shaft is connected to the motor output shaft, and the balancing block is connected to the eccentric shaft. The top and lower ends of the eccentric shaft are eccentrically arranged, and the top of the eccentric shaft is docked and installed with the middle hole on the bottom surface of the oscillation platform through a bearing; the balancing block includes a fan-shaped portion and an annular portion connected to the fan-shaped portion, and a concave positioning port is provided on the side of the annular portion; an electromagnetic magnet assembly is provided in the lower seat body, and the electromagnetic magnet assembly drives the positioning push rod to telescopically move, and engages with the positioning port after the positioning push rod is extended.

6. The high-stability low-noise mixing oscillator according to claim 5, characterized in that: Arc-shaped guide surfaces are arranged on both sides of the mouth of the positioning opening; and a fan-shaped counterweight plate is detachably connected to the top of the fan-shaped portion of the balancing block.

7. The high-stability low-noise mixing oscillator according to claim 5, characterized in that: The electromagnetic magnet assembly includes a base, an electromagnetic magnet body, a positioning push rod, a limit block, a sleeve, a clamping ring and a reset spring. The base is fixedly connected to the lower base body, and the electromagnetic magnet body and the limit block are both fixedly connected to the base. The positioning push rod runs through the electromagnetic magnet body and the limit block. The sleeve is sleeved on the front end of the positioning push rod, the sleeve is located on the front side of the limit block, the clamping ring is clamped on the tail end of the positioning push rod, and the reset spring is located between the clamping ring and the rear end face of the electromagnetic magnet body.

8. The high-stability low-noise mixing oscillator according to claim 1, characterized in that: The oscillating platform is also provided with an adaptive orifice plate clamping mechanism for clamping the orifice plate, and the adaptive orifice plate clamping mechanism includes a turntable, a first angle code linkage mechanism, a second angle code linkage mechanism and an opening and closing drive mechanism; The turntable is rotatably mounted at the middle position of the bottom surface of the oscillating platform; The first angle code linkage mechanism includes a first angle code, a first slide rail assembly and a first connecting rod. The upper surface of the first angle code is provided with a first regulating rod and a second regulating rod vertically arranged. The first regulating rod and the second regulating rod are used to regulate the first long side and the first short side of the orifice plate respectively. The first slide rail assembly includes a first slide and a first slide rail. The first slide rail is fixedly connected to the bottom surface of the oscillating platform. The first slide rail is arranged at 45 degrees to the edge line of the oscillating platform. The bottom of the first angle code is fixedly connected to the first slide. One end of the first connecting rod is hinged to the first slide, and the other end of the first connecting rod is hinged to the turntable. The second angle code linkage mechanism includes a second angle code, a second slide rail assembly and a second connecting rod. The upper surface of the second angle code is provided with a third regulating rod and a fourth regulating rod arranged vertically. The third regulating rod and the fourth regulating rod are used to regulate the second long side and the second short side of the orifice plate respectively. The second slide rail assembly includes a second slide and a second slide rail. The second slide rail is fixedly connected to the bottom surface of the oscillating platform. The second slide rail is arranged at 45 degrees to the edge line of the oscillating platform. The bottom of the second angle code is fixedly connected to the second slide. One end of the second connecting rod is hinged to the second slide, and the other end of the second connecting rod is hinged to the turntable. The opening and closing drive mechanism includes a third connecting rod, a pulling magnetic block, a fixed magnetic seat, a third slide rail assembly, a handle and a tension spring. The third slide rail assembly includes a third slide and a third slide rail. The third slide rail is fixedly installed on the bottom surface of the oscillation platform. The third slide rail is arranged parallel to the short side line of the oscillation platform. The fixed magnetic seat is fixedly connected to the bottom surface of the oscillation platform. Magnets are provided in the fixed magnetic seat and the pulling magnetic block. One end of the third connecting rod is hinged to the turntable, and the other end of the third connecting rod is connected to one end of the pulling magnetic block. The other end of the pulling magnetic block is hinged to the third slide. The handle is fixedly connected to the third slide, and the tension spring is connected between the third slide and the oscillation platform.

9. The high-stability low-noise mixing oscillator according to claim 8, characterized in that: The magnetic pulling block is provided with a protruding push shaft, and a rotatable rotating sleeve is sleeved on the outer periphery of the push shaft; a pushing mechanism is provided in the oscillator base unit, and the pushing mechanism includes a servo and a swing arm, the servo is fixedly installed in the oscillator base unit, and the swing arm is installed on the rotating shaft of the servo, and the magnetic pulling block is pushed by the swinging of the swing arm, thereby realizing the opening of the first angle code and the second angle code.

10. The high-stability low-noise mixing oscillator according to claim 8, characterized in that: A handle sliding opening for the handle to extend out is provided on one side of the oscillation platform, and a shielding guard plate is connected to the third slide, and the shielding guard plate is used to shield the handle sliding opening when the tension spring drives the handle to reset.

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