Blending oscillation device and stop positioning mechanism of oscillation platform thereof

Abstract

The utility model provides a mixing oscillation device and a stop positioning mechanism of an oscillation platform of the mixing oscillation device. A polarization driving mechanism is arranged in the middle of the blending oscillation device base unit and comprises a motor, an eccentric shaft and a balance block, and the top end of the eccentric shaft is in butt joint with a middle hole in the bottom face of the oscillation platform through a bearing; an electromagnet assembly is arranged in the lower seat body and drives the positioning ejector rod to move in a telescopic mode, the balance block comprises a fan-shaped part and an annular part connected with the fan-shaped part, a concave positioning opening is formed in the side face of the annular part, and the positioning ejector rod is clamped with the positioning opening after stretching out. Before the oscillation platform stops, the position of the polarization shaft balance block is limited through the electromagnetic magnet assembly, the oscillation platform can stop at the same position, and a mechanical gripper in an automatic experiment platform can conveniently and accurately grab a pore plate on the oscillation platform.

Description

Technical Field

[0001] The utility model relates to the technical field of sample liquid mixing, in particular to a mixing oscillation device and a stop positioning mechanism of an oscillation platform thereof. Background Art

[0002] Oscillators are commonly used in laboratories, widely used in biology, chemistry, medicine, and other fields, for rapid sample mixing and oscillation. The operating principle of an oscillator is primarily based on rotational or oscillatory motion. An electric drive creates a strong eddy current or reciprocating motion within the sample container, thereby achieving rapid sample mixing and oscillation. Vortex mixers utilize the principle of eccentric rotation, using a drive mechanism to generate a strong eddy current within the liquid container, achieving rapid sample mixing and oscillation. These vortex mixers are suitable for mixing small sample volumes.

[0003] After the existing mixing oscillator stops, the stopping position of the oscillation platform is not fixed. When the oscillator is used in an automated experimental platform, it is impossible to ensure that the robot can accurately pick up and place the sample well plate. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the purpose of the present utility model is to provide a mixing and oscillating device and a stop positioning mechanism for an oscillating platform thereof.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention to solve the technical problem is: a stop positioning mechanism of an oscillating platform, comprising:

[0006] an oscillating platform, the upper surface of which is used to place the sample well plate;

[0007] The base unit includes a lower seat body, a polarization drive mechanism is provided in the middle part of the lower seat body, and the polarization drive mechanism includes a motor, an eccentric shaft and a balance block. The lower end of the eccentric shaft is connected to the motor output shaft, and the balance block is connected to the eccentric shaft. The top and lower ends of the eccentric shaft are eccentrically arranged, and the top end of the eccentric shaft is docked and installed with the middle hole on the bottom surface of the oscillation platform through a bearing; an electromagnetic magnet assembly is provided in the lower seat body, and the electromagnetic magnet assembly drives the positioning push rod to move telescopically, and the balance block includes a fan-shaped portion and an annular portion connected to the fan-shaped portion, and an inwardly concave positioning port is provided on the side of the annular portion, which engages with the positioning port after the positioning push rod is extended.

[0008] Furthermore, arc-shaped guide surfaces are provided on both sides of the opening of the positioning opening.

[0009] Furthermore, a sector-shaped counterweight plate is detachably connected to the top of the sector-shaped portion of the balance weight.

[0010] Furthermore, the electromagnetic iron-absorbing assembly includes a base, an electromagnetic iron-absorbing 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, and the electromagnetic iron-absorbing body and the limit block are both fixedly connected to the base. The positioning push rod passes through the electromagnetic iron-absorbing 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 at 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 iron-absorbing body.

[0011] The mixing oscillation device comprises an oscillation platform and a base unit, wherein the oscillation platform and the base unit adopt the above-mentioned stop positioning mechanism of the oscillation platform.

[0012] The beneficial effect of the utility model is that before the oscillation platform stops, the position of the polarization axis balance block is limited by the electromagnetic iron-absorbing component, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0014] Figure 1 It is a structural schematic diagram of the mixing and oscillating device of the present utility model.

[0015] Figure 2 It is a cross-sectional view of the mixing and oscillating device of the present invention.

[0016] Figure 3 It is a structural diagram of the base unit.

[0017] Figure 4 is a top view of the base unit.

[0018] Figure 5 is a cross-sectional view of the base unit.

[0019] Figure 6 It is a structural diagram of the oscillation platform.

[0020] Figure 7 This is a schematic diagram of the back side of the oscillation platform.

[0021] Figure 8 is a cross-sectional view of the oscillating platform.

[0022] Figure 9It is a schematic diagram of the back structure of the oscillation platform.

[0023] Figure 10 It is a bottom view of the oscillating platform.

[0024] Figure 11 It is a structural diagram of the electromagnetic magnet assembly.

[0025] Figure 12 It is a structural diagram of the balancing block.

[0026] The numbers and letters in the figure represent the names of the corresponding parts:

[0027] 10 - oscillation platform; 11 - ball bearing surface; 111 - upper wear-resistant ceramic plate; 12 - magnetic column; 121 - connector; 122 - rolling bearing; 123 - copper column; 124 - upper magnet;

[0028] 20 - Adaptive orifice plate clamping mechanism; 21 - Rotating disk; 22 - First angle code linkage mechanism; 221 - First angle code; 222 - First regulating rod; 223 - Second regulating rod; 224 - First slide; 225 - First slide rail; 226 - First connecting rod; 23 - Second angle code linkage mechanism; 231 - Second angle code; 232 - Third regulating rod; 233 - Fourth regulating rod; 234 - Second slide; 235 - Second slide rail; 236 - second connecting rod; 24 - opening and closing drive mechanism; 241 - third connecting rod; 242 - pull magnet; 2421 - push shaft; 2422 - rotating sleeve; 243 - fixed magnetic seat; 244 - third slide; 245 - third slide rail; 246 - handle; 247 - tension spring; 248 - handle sliding opening; 249 - shielding plate; 25 - pushing mechanism; 251 - servo; 252 - swing arm;

[0029] 30-base unit; 31-polarization drive mechanism; 311-motor; 312-eccentric shaft; 313-balancing block; 3131-sector-shaped portion; 3132-annular portion; 3133-positioning opening; 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; 34-electromagnetic magnet assembly; 341-base; 342-electromagnetic magnet body; 343-positioning ejector pin; 344-limiting block; 345-sleeve; 346-retaining ring. DETAILED DESCRIPTION

[0030] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0031] like Figure 2 、 4 As shown in , 11 and 12, the stop positioning mechanism of the oscillating platform includes:

[0032] An oscillating platform 10, the upper surface of which is used to place the sample well plate;

[0033] The base unit 30 includes a lower base body; a polarization driving mechanism 31 is provided in the middle of the lower base body; the polarization driving mechanism 31 includes a motor 311, an eccentric shaft 312 and a balancing weight 313, the lower end of the eccentric shaft 312 is connected to the output shaft of the motor 311, and the balancing weight 313 is connected to the eccentric shaft 312, the top and lower ends of the eccentric shaft 312 are eccentrically arranged, the top end 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 the freedom of movement up and down between the middle hole of the bottom surface of the oscillation platform 10; an electromagnetic magnet assembly 34 is provided in the lower base body of the base unit 30, and the electromagnetic magnet assembly 34 drives the positioning push rod 343 to move telescopically, and the balancing weight 313 includes a fan-shaped portion 3131 and a ring-shaped portion 3132 connected to the fan-shaped portion, and an inwardly concave positioning opening 3133 is provided on the side of the ring-shaped portion 3132, which engages with the positioning opening 3133 after the positioning push rod 343 is extended.

[0034] 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 facilitates the mechanical gripper in the automated experimental platform to accurately grasp the orifice plate on the oscillation platform.

[0035] In 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.

[0036] In some other embodiments of the present invention, a sector-shaped counterweight plate 3135 is detachably connected to the top of the sector-shaped portion 3131 of the balancing weight. The beneficial effect of adopting the above technical solution is that it is convenient to adjust the counterweight of the balancing weight.

[0037] In other embodiments of the present invention, the electromagnetic magnet assembly 34 includes a base 341, an electromagnetic magnet body 342, a positioning pin 343, a limit block 344, a sleeve 345, a snap ring 346, and a return 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 pin 343 passes through the electromagnetic magnet body 342 and the limit block 344, the sleeve 345 is sleeved on the front end of the positioning pin 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 pin 343, and the return 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.

[0038] like Figure 1-12 As shown, the mixing oscillation device includes an oscillation platform 10 and a base unit 20 , and the oscillation platform 10 and the base unit 20 use the above-mentioned oscillation platform stop positioning mechanism.

[0039] In other embodiments of the present invention, the upper surface of the oscillating platform 10 is used to place the sample well plate, and the bottom surface of the oscillating platform 10 is provided with three ball support surfaces 11 distributed in a circular array, and the bottom surface of the oscillating platform 10 is also provided with at least three magnetic columns 12 extending vertically downward, and the magnetic columns 12 are sleeved with rolling bearings 122, and the bottom of the magnetic columns 12 is installed with upper magnets 124; the base unit 30 includes a lower seat, and the middle part of the lower seat is provided with a polarization drive mechanism 31; the upper surface of the lower seat is provided with three concave ball receiving holes 32, and the ball receiving holes 32 are provided with balls 321, and the top of the ball 321 is aligned with the ball support of the oscillating platform. The lower seat body is in contact with the bearing surface 11, and a first elastic ring 322 is provided in the middle of the inner wall of the ball accommodating hole 32. The height position of the first elastic ring 322 matches the height of the center of the ball 321. The upper surface of the lower seat body is also provided with at least three concave polarization track slots 33. The bottom of the polarization track slot 33 is provided with a lower magnet 331. The magnetic column 12 extends downward into the polarization track slot 33. The upper magnet 124 and the lower magnet 331 attract each other. The bottom surface of the magnetic column 12 is in a non-contact state with the bottom surface of the polarization track slot 33. The inner wall of the polarization track slot 33 is provided with a second elastic ring 332. The height position of the second elastic ring 332 matches the rolling bearing 122 on the magnetic column. 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 support 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 smoothness of operation; during oscillation, the column body of the magnetic column is first buffered by the contact between the elastic ring and the rolling bearing. 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.

[0040] 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 balls 321 are nylon balls. The above technical solution has the beneficial effect of increasing the service life of the balls and their supporting structure.

[0041] In 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.

[0042] In other embodiments of the present invention, the rolling bearing 122 and the copper pillar 123 are coaxially arranged. The outer diameter of the copper pillar 123 is larger than that of the rolling bearing 122. The difference between the outer diameters of the copper pillar 123 and the outer diameters of the rolling bearing 122 is denoted by 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 denoted by b. Here, b > a / 2 + 0.5 mm, and 0.1 mm ≤ a ≤ 1 mm. This advantageous effect of employing the above-described technical solution is that it balances the elastic ring's shock-absorbing and buffering effect on the operation of the magnetic pillar with the rigid support provided by the copper pillar and the inner wall of the polarization track slot, ensuring stable operation of the oscillator and extending its service life.

[0043] In 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. 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.

[0044] The turntable 21 is rotatably mounted in the middle of the bottom surface of the oscillating platform 10;

[0045] 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 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 set 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.

[0046] 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 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 set 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.

[0047] The opening and closing drive mechanism 24 includes a third connecting rod 241, a pulling magnetic 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 pulling magnetic 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 pulling magnetic block 242. The other end of the pulling magnetic 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 and second angle codes. Compared with the fixed clamping method, the clamping force is stable, which can eliminate the influence of manufacturing errors of different orifice plate sizes on the clamping force, and facilitate the removal and placement of the orifice plate.

[0048] In other embodiments of the present invention, a protruding push shaft 2421 is provided on the pulling magnetic block 242, and a pushing mechanism 25 is provided in the base unit. The pushing mechanism 25 is used to apply a driving force to the pushing shaft 2421 to urge the pulling magnetic block 242 to move away from the fixed magnetic seat 234. A rotatable sleeve 2422 is provided on the outer periphery of the pushing shaft 2421. The pushing mechanism 25 includes a servo 251 and a swing arm 252. The servo 251 is fixedly installed in the base unit 30, and the swing arm 252 is installed on the rotating shaft of the servo 251. The swing arm 252 is swung to push the pulling 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 servo, and it can be organically integrated into the automated experimental platform.

[0049] In other embodiments of the present invention, the engaging surfaces of the fixed magnetic seat 243 and the pulling magnetic block 242 are perpendicular to the length direction of the third slide rail 245. The beneficial effect of adopting the above technical solution is to improve the attraction force and ensure a stable clamping force on the orifice plate.

[0050] In other embodiments of the present invention, a handle sliding opening 248 is provided on one side of the oscillating platform 10 for extending the handle 246. A shielding plate 249 is connected to the third slide 244. The shielding plate 249 is used to block the handle sliding opening 248 when the tension spring 247 drives the handle to return to its original position. The beneficial effect of adopting this technical solution is to prevent the hand from being pinched during operation and improve safety performance.

[0051] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable ordinary technicians in this field to understand the content of the present invention and implement it. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. The stop positioning mechanism of the oscillating platform is characterized by: include: an oscillating platform, the upper surface of which is used to place the sample well plate; The base unit includes a lower seat body, a polarization drive mechanism is provided in the middle part of the lower seat body, and the polarization drive mechanism includes a motor, an eccentric shaft and a balance block. The lower end of the eccentric shaft is connected to the motor output shaft, and the balance block is connected to the eccentric shaft. The top and lower ends of the eccentric shaft are eccentrically arranged, and the top end of the eccentric shaft is docked and installed with the middle hole on the bottom surface of the oscillation platform through a bearing; an electromagnetic magnet assembly is provided in the lower seat body, and the electromagnetic magnet assembly drives the positioning push rod to move telescopically, and the balance block includes a fan-shaped portion and an annular portion connected to the fan-shaped portion, and an inwardly concave positioning port is provided on the side of the annular portion, which engages with the positioning port after the positioning push rod is extended.

2. The stop positioning mechanism of the oscillating platform according to claim 1, characterized in that: Arc-shaped guide surfaces are provided on both sides of the mouth of the positioning opening.

3. The stop positioning mechanism of the oscillating platform according to claim 1, characterized in that: The top of the sector-shaped portion of the balance weight is detachably connected to a sector-shaped counterweight plate.

4. The stop positioning mechanism of the oscillating platform according to claim 1, characterized in that: The electromagnetic iron-absorbing assembly includes a base, an electromagnetic iron-absorbing body, a positioning push rod, a limit block, a sleeve, a retaining ring and a reset spring. The base is fixedly connected to the lower base body, and the electromagnetic iron-absorbing body and the limit block are both fixedly connected to the base. The positioning push rod passes through the electromagnetic iron-absorbing 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 reset spring is located between the retaining ring and the rear end face of the electromagnetic iron-absorbing body.

5. Mixing and oscillating device, characterized in that: The device comprises an oscillating platform and a base unit, wherein a stop positioning mechanism of the oscillating platform as claimed in any one of claims 1 to 4 is adopted between the oscillating platform and the base unit.

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