Suction head arranging device for double-screw pipettor

Abstract

The utility model discloses a double-screw pipettor suction head arranging device which comprises a double-screw arranging assembly detachably installed on a fixing plate and connected with a second driving part, a double-screw conveying channel is arranged between two variable-diameter screws, and the two variable-diameter screws conduct synchronous rotation movement in opposite directions through a gear set so as to complete suction head conveying. According to the device, a group of driving motors are used for driving the double-screw arrangement assembly through mutual cooperation of a belt wheel, a synchronous belt and a gear set, so that the stability is higher, and the working efficiency is improved; meanwhile, one end of the double-screw arrangement assembly is arranged in the suction head storage roller mechanism, so that the size of the device can be reduced, the double-screw arrangement assembly is directly driven by the second driving part, and the cost can be saved; in addition, the double-screw arrangement assembly is convenient to disassemble, the double-screw arrangement assembly suitable for 10 microliters or 200 microliters can be selectively installed according to needs, multiple purposes of one machine are achieved, and operation is easy and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of biological and medical equipment manufacturing, and particularly relates to a double-screw pipette tip arranging device. Background Art

[0002] Pipette tips are commonly used in biological, chemical, medical laboratories and other related scenarios. In order to cooperate with the pipette, the pipette tips need to be neatly arranged in sequence in a tip box with fixed holes. In the prior art, the pipette tip loading instrument usually uses a vibrating disc and a linear vibrator in cooperation to complete the feeding, which has the disadvantages of large volume, high noise and high cost. At the same time, in the prior art, a circular belt is usually arranged in the feeding roller and the reciprocating motion is completed through a driving device to complete the feeding. However, the circular belt is elastic, resulting in poor stability of the arranged and transported tips, thus affecting the working efficiency. At the same time, the service life of the circular belt is relatively short.

[0003] Therefore, it is necessary to design a pipette tip arranging device with high efficiency, good stability and durability. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model provides a double-screw pipette tip arranging device to solve the problems existing in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A double-screw pipette tip arranging device includes a feeding device body. The feeding device body includes a tip storage roller mechanism. The tip storage roller mechanism has a roller and is fixed through a roller fixing component. The feeding device body also includes a double-screw feeding mechanism connected and fixed to the roller fixing component through a fixing plate, specifically including:

[0007] A double-screw arranging component, detachably installed on the fixing plate and driven by a second driving part. It is assembled by two variable-diameter screws through two fixing parts, and the two variable-diameter screws perform synchronous rotational motion in opposite directions through the meshing transmission of a gear set. There is a double-screw conveying channel between the two variable-diameter screws, which is divided into an arranging area and a feeding area. The diameter of the arranging area is larger than that of the feeding area. A tip dropping hole is arranged at one end of the arranging area close to the fixing plate. The aperture of the tip dropping hole is larger than the outer diameter of the tip. The feeding area is arranged inside the tip storage roller mechanism and is used to pick up the tips thrown during its rotation.

[0008] A tip screening component, fixedly installed on the fixing plate and arranged above the double-screw arranging component, is used to process and screen out the tips stacked on the double-screw arranging component during the feeding process.

[0009] Further, the double-screw arrangement assembly has two models adapted to 10 μl and 200 μl. The two variable-diameter screws are specifically the driving screw and the driven screw. The heads of the two variable-diameter screws are provided with a first double-screw fixing member, and the tails of the two variable-diameter screws are provided with a second double-screw fixing member. The first double-screw fixing member uses fasteners through multiple copper columns to fixedly install the double-screw arrangement assembly on the fixing plate;

[0010] The gear set includes a driving gear arranged on the driving screw and a driven gear arranged on the driven screw and meshing with it. The driving screw is also provided with a second pulley cooperating with the second driving part.

[0011] Further, the second driving part includes a second driving motor. A first pulley is installed on the output shaft of the second driving motor. A first synchronous belt is installed on the first pulley. The other end of the first synchronous belt is installed on the second pulley. The second pulley is driven to rotate through the first synchronous belt, and then the driving screw is driven to rotate.

[0012] Further, the storage and suction head drum mechanism further includes a door magnetically connected to the drum; the drum is driven by a first driving part. Teeth are provided at one end of the outer circumference of the drum close to the drum fixing assembly and mesh with the driving gear of the first driving part. The driving gear is driven by a first driving motor.

[0013] Further, the screening and suction head assembly includes a screening tooth roller arranged at one end above the double-screw arrangement assembly close to the suction head dropping hole. A fourth pulley is provided on the screening tooth roller; it also includes a third driving motor. A third pulley is installed on the output shaft of the third driving motor. A second synchronous belt is installed on the third pulley. The other end of the second synchronous belt is installed on the fourth pulley, so as to realize the rolling of the screening tooth roller above the double-screw arrangement assembly.

[0014] Further, the screening and suction head assembly further includes a material scraping rod. The material scraping rod is arranged at one end of the driving screw close to the screening tooth roller. A groove for the material scraping rod to pass through is provided on the driven screw.

[0015] Further, there are two groups of the material scraping rods.

[0016] Further, the storage and suction head drum mechanism further includes a recovery guide groove installed on the drum fixing assembly, which can effectively intercept the suction heads leaving the inside of the drum.

[0017] Further, the double-screw feeding mechanism further includes a suction head dropping and feeding port installed on the fixing plate and arranged below the double-screw arrangement assembly. The suction head dropping and feeding port corresponds to the hole position of the suction head dropping hole, and plays a role of guiding and straightening the posture at the moment when the suction head drops.

[0018] The beneficial effects of the present utility model are as follows: A set of driving motors are used in this device to drive the double-screw arrangement assembly through the mutual cooperation of belt pulleys, synchronous belts and gear sets, which can ensure that the two variable-diameter screws stably perform synchronous rotational movements in opposite directions, and convey the arranged pipette tips to the feeding position, with higher stability and thus improved work efficiency. At the same time, one end of the double-screw arrangement assembly is arranged inside the storage tip roller mechanism, which can reduce the volume of the device, and the double-screw arrangement assembly is directly driven by the second driving part, which can save costs. In addition, the double-screw arrangement assembly is assembled by two variable-diameter screws through two fixing parts, which is convenient for disassembly. The double-screw arrangement assemblies suitable for two models of 10 μl or 200 μl can be selected and installed as needed, realizing multi-function with one machine and simple and fast operation. Brief Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the storage tip roller mechanism of the present utility model;

[0021] Figure 3 For the present utility model Figure 2 The enlarged view at A in;

[0022] Figure 4 It is a schematic diagram of the structure of the double-screw feeding mechanism of the present utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the double-screw arrangement assembly of the present utility model;

[0024] Figure 6 It is a schematic diagram of the structure of the sieve tip assembly of the present utility model;

[0025] In the figure: 1. Storage tip roller mechanism; 2. Double-screw feeding mechanism;

[0026] 11. Warehouse door; 12. Roller; 13. Roller fixing assembly; 14. First driving part; 15. Return material guide groove;

[0027] 141. Driving gear; 142. First driving motor;

[0028] 21. Fixed plate; 22. Second driving part; 23. Double-screw arrangement assembly; 24. Tip dropping and feeding port; 25. Sieve tip assembly;

[0029] 221. Second driving motor; 222. First belt pulley; 223. First synchronous belt;

[0030] 231. Active screw; 232. Second pulley; 233. Driving gear; 234. Driven screw; 235. Driven gear; 236. First double-screw fixing part; 237. Second double-screw fixing part; 238. Copper column; 239. Tip blanking hole

[0031] 251. Third driving motor; 252. Third pulley; 253. Screening tooth roller; 254. Second synchronous belt; 255. Material scraping rod; 256. Fourth pulley Specific implementation mode

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0033] A double-screw pipette tip arranging device, as Figures 1-6 shown, includes a feeding device body. The feeding device body includes a storage tip drum mechanism 1. The storage tip drum mechanism 1 has a drum 12 and is fixed by a drum fixing component 13. The drum fixing component 13 is made of 6061 aluminum material. The feeding device body further includes a double-screw feeding mechanism 2 connected and fixed to the drum fixing component 13 through a fixing plate 21, specifically including:

[0034] A double-screw arranging assembly 23, which is detachably installed on the fixing plate 21 and driven by a second driving part 22. It is assembled by two variable-diameter screws through two fixing parts, and the two variable-diameter screws perform synchronous rotational movements in opposite directions through the meshing transmission of a gear set. There is a double-screw conveying channel between the two variable-diameter screws, which is divided into an arranging area and a feeding area. The diameter of the arranging area is larger than that of the feeding area to prevent the accumulation of tips with poor falling postures. At one end of the arranging area close to the fixing plate 21, there is a tip blanking hole 239. The aperture of the tip blanking hole 239 is larger than the outer diameter of the tip, facilitating the tip to pass through and accurately fall into the material box. The feeding area is arranged inside the storage tip drum mechanism 1 and is used to pick up the tips thrown during its rotation. The tips with good postures will fall into the double-screw conveying channel in the feeding area. With the synchronous rotational movement of the two variable-diameter screws, the tips with good postures are conveyed to the arranging area, so that the arranged tips are orderly conveyed to the tip blanking hole 239 to fall and complete the feeding;

[0035] The screening suction head assembly 25 is fixedly installed on the fixed plate 21 and is arranged above the double-screw arrangement assembly 23. It is used to process and screen out the suction heads that are stacked on the double-screw arrangement assembly 23 during the feeding process and cannot accurately fall into the double-screw conveying channel. Under the combined action of the screening component 25, they leave the double-screw arrangement assembly 23 and fall into the return material guide groove 15 and then slide back to the drum 12 naturally, which can better ensure the normal operation of the equipment.

[0036] In the present utility model, preferably, the double-screw arrangement assembly 23 has two models suitable for 10 μl and 200 μl. Before use, select and install the double-screw arrangement assembly 23 suitable for the 10 μl or 200 μl model as required; the two variable-diameter screws are specifically the driving screw 231 and the driven screw 234. The heads of the two variable-diameter screws have the first double-screw fixing member 236, and the tails of the two variable-diameter screws have the second double-screw fixing member 237. The first double-screw fixing member 236 is fixed and installed on the fixed plate 21 by using fasteners through multiple groups of copper columns 238. Bearings are installed on both the first double-screw fixing member 236 and the second double-screw fixing member 237. After the screws are inserted into the corresponding bearings, they can rotate smoothly.

[0037] The gear set includes a driving gear 233 arranged on the driving screw 231 and a driven gear 235 arranged on the driven screw 234 and meshing with it. The driving screw 231 also has a second belt pulley 232 that cooperates with the second driving part 22. The second driving motor 221 drives the first belt pulley 222 to rotate, and then drives the second belt pulley 232 to rotate through the first synchronous belt 223, thereby driving the driving screw 231 to rotate. Then, through the meshing transmission of the driving gear 233 and the driven gear 235, the driven screw 234 is driven to rotate, and thus the driving screw 231 and the driven screw 234 perform synchronous rotational movements in opposite directions.

[0038] In the present utility model, preferably, the second driving part 22 includes a second driving motor 221. A first belt pulley 222 is installed on the output shaft of the second driving motor 221. A first synchronous belt 223 is installed on the first belt pulley 222. The other end of the first synchronous belt 223 is installed on the second belt pulley 232. The second belt pulley 232 is driven to rotate through the first synchronous belt 223, and then the driving screw 231 is driven to rotate. That is, a set of driving motors is used to complete the driving of the double-screw arrangement assembly 23 through the mutual cooperation of belt pulleys, synchronous belts, and gear sets, which can ensure that the two variable-diameter screws stably perform synchronous rotational movements in opposite directions and convey the arranged pipette suction heads to the dropping position.

[0039] In the present utility model, preferably, the storage and suction head roller mechanism 1 further includes a door 11 magnetically connected to the roller 12; the roller 12 is driven by a first driving part 14. One end of the outer circumference of the roller 12 close to the roller fixing assembly 13 is provided with teeth, which mesh with the driving gear 141 of the first driving part 14. The driving gear 141 is driven by a first driving motor 142, and then drives the roller 12 to rotate through the teeth on the outer circumference of the roller 12 meshed therewith. Then, the suction heads in the roller 12 are thrown into the double-screw conveying channel in the feeding area of the double-screw arrangement assembly 23.

[0040] In the present utility model, preferably, the screening and suction head assembly 25 includes a screening tooth roller 253 arranged at one end above the double-screw arrangement assembly 23 close to the suction head dropping hole 239. The screening tooth roller 253 is provided with a fourth belt pulley 256; it further includes a third driving motor 251. A third belt pulley 252 is installed on the output shaft of the third driving motor 251. A second synchronous belt 254 is installed on the third belt pulley 252, and the other end of the second synchronous belt 254 is installed on the fourth belt pulley 256, so as to realize the rolling of the screening tooth roller 253 above the double-screw arrangement assembly 23. Suction heads that cannot accurately fall into the double-screw conveying channel due to problems such as stacking and posture will, under the combined action of the screening assembly 25, leave the double-screw arrangement assembly 23 and fall into the return material guide groove 15 and naturally slide back into the roller 12, which can better ensure the normal operation of the equipment.

[0041] In the present utility model, preferably, the screening and suction head assembly 25 further includes a material scraping rod 255. The material scraping rod 255 is arranged at one end of the active screw 231 close to the screening tooth roller 253. The material scraping rod 255 rotates with the rotation of the active screw 231 to scrape off the suction heads stacked on the double-screw arrangement assembly 23. With the combined cooperation of the material scraping rod 255 and the screening tooth roller 253, the efficiency of screening and suction heads can be improved. The driven screw 234 is provided with a groove for the material scraping rod 255 to pass through, which can ensure that the double-screw arrangement assembly 23 can normally complete the synchronous rotation movement.

[0042] In the present utility model, preferably, there are two groups of the material scraping rods 255 to make the material scraping effect better.

[0043] In the present utility model, preferably, the storage and suction head roller mechanism 1 further includes a recovery guide groove 15 installed on the roller fixing assembly 13, which can effectively intercept the suction heads leaving the inside of the roller 12 and prevent the suction heads from flying out. The suction heads that do not fall on the double-screw arrangement assembly 23 will be intercepted by the return material guide groove 15 and naturally slide back into the roller 12.

[0044] In the present utility model, preferably, the double-screw feeding mechanism 2 further includes a suction head dropping and feeding port 24 installed on the fixing plate 21 and disposed below the double-screw arrangement assembly 23. The suction head dropping and feeding port 24 corresponds to the hole position of the suction head dropping hole 239, which plays a role of guiding and straightening the posture at the moment when the suction head drops, thereby improving the feeding efficiency.

[0045] The working principle of the present utility model: Before use, select and install the double-screw arrangement assembly 23 suitable for two models of 10 μl or 200 μl as required, and then use fasteners to fixedly install the first double-screw fixing member 236 on the fixing plate 21 through the copper column 238, that is, fix the double-screw arrangement assembly 23 on the fixing plate 21 to complete the installation; during use, after starting the power supply, the first driving motor 142 drives the driving gear 141 to rotate, and then drives the roller 12 to rotate through the teeth on the outer circumference of the roller 12 meshed therewith. Then, the suction heads in the roller 12 are thrown into the double-screw conveying channels in the feeding area of the double-screw arrangement assembly 23. The suction heads that do not fall on the double-screw arrangement assembly 23 will be intercepted by the return material guiding groove 15 and naturally slide back into the roller 12; the second driving motor 221 drives the first belt pulley 222 to rotate, and then drives the second belt pulley 232 to rotate through the first synchronous belt 223, thereby driving the driving screw 231 to rotate. Then, through the meshing transmission of the driving gear 233 and the driven gear 235, the driven screw 234 is driven to rotate, and thus the driving screw 231 and the driven screw 234 perform synchronous rotational movements in opposite directions. With the synchronous rotational movements of the two variable-diameter screws, the well-positioned suction heads are conveyed to the arranging area, and then the arranged suction heads are orderly conveyed to the suction head dropping hole 239 to drop and complete the feeding. The suction heads that cannot accurately fall into the double-screw conveying channels due to problems such as stacking and posture will, under the combined action of the screening component 25, leave the double-screw arrangement assembly 23, fall into the return material guiding groove 15, and naturally slide back into the roller 12, which can better ensure the normal operation of the equipment.

[0046] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A double-screw pipette tip arranging device, comprising a feeding device body, the feeding device body including a pipette tip storage drum mechanism (1), the pipette tip storage drum mechanism (1) having a drum (12) and being fixed by a drum fixing assembly (13), characterized in that, The feeding device body further includes a double-screw feeding mechanism (2) fixedly connected to the drum fixing assembly (13) through a fixing plate (21), specifically including: A double-screw arrangement assembly (23), detachably mounted on the fixing plate (21) and driven by a second driving part (22). It is assembled by two variable-diameter screws through two fixing parts, and the two variable-diameter screws perform synchronous rotational movement in opposite directions through the meshing transmission of a gear set. There is a double-screw conveying channel between the two variable-diameter screws, which is divided into an arrangement area and a feeding area. The diameter of the arrangement area is larger than that of the feeding area. One end of the arrangement area close to the fixing plate (21) is provided with a suction head blanking hole (239), and the aperture of the suction head blanking hole (239) is larger than the outer diameter of the suction head. The feeding area is arranged inside the suction head drum mechanism (1) for picking up the suction heads thrown during its rotation. A suction head screening assembly (25), fixedly mounted on the fixing plate (21) and arranged above the double-screw arrangement assembly (23), is used to process and screen out the suction heads stacked on the double-screw arrangement assembly (23) during the feeding process.

2. The double-screw pipette tip arrangement device according to claim 1, wherein, The double-screw arrangement assembly (23) has two models suitable for 10 μl and 200 μl. The two variable-diameter screws are specifically a driving screw (231) and a driven screw (234). The heads of the two variable-diameter screws have a first double-screw fixing part (236), and the tails of the two variable-diameter screws have a second double-screw fixing part (237). The first double-screw fixing part (236) uses a plurality of copper columns (238) and fasteners to fixedly mount the double-screw arrangement assembly (23) on the fixing plate (21). The gear set includes a driving gear (233) arranged on the driving screw (231) and a driven gear (235) arranged on the driven screw (234) and meshing with it. The driving screw (231) also has a second belt pulley (232) cooperating with the second driving part (22).

3. The double-screw pipette tip arrangement device according to claim 2, characterized in that, The second driving part (22) includes a second driving motor (221). A first belt pulley (222) is installed on the output shaft of the second driving motor (221). A first synchronous belt (223) is installed on the first belt pulley (222). The other end of the first synchronous belt (223) is installed on the second belt pulley (232). The second belt pulley (232) is driven to rotate through the first synchronous belt (223), and then the driving screw (231) is driven to rotate.

4. The double-screw pipette tip arrangement device according to claim 1, characterized in that The suction head drum mechanism (1) further includes a door (11) magnetically connected to the drum (12). The drum (12) is driven by a first driving part (14). Teeth are provided at one end of the outer circumference of the drum (12) close to the drum fixing assembly (13), which meshes with the driving gear (141) of the first driving part (14). The driving gear (141) is driven by a first driving motor (142).

5. The double-screw pipette tip arrangement device according to claim 2, characterized in that, The screening and suction head assembly (25) includes a screening tooth roller (253) disposed at one end above the twin-screw arrangement assembly (23) near the suction head blanking hole (239). A fourth pulley (256) is provided on the screening tooth roller (253). It further includes a third driving motor (251). A third pulley (252) is installed on the output shaft of the third driving motor (251). A second synchronous belt (254) is installed on the third pulley (252), and the other end of the second synchronous belt (254) is installed on the fourth pulley (256), thereby enabling the screening tooth roller (253) to roll above the twin-screw arrangement assembly (23).

6. The double-screw pipette tip arranging device according to claim 5, wherein The screening and suction head assembly (25) further includes a material scraping rod (255). The material scraping rod (255) is disposed at one end of the active screw (231) near the screening tooth roller (253). A groove for the material scraping rod (255) to pass through is provided on the driven screw (234).

7. The double-screw pipette tip arrangement device according to claim 6, characterized in that, There are two groups of the material scraping rods (255).

8. The double-screw pipette tip arranging device according to any one of claims 1 to 7, characterized in that, The storage and suction head drum mechanism (1) further includes a recovery guide groove (15) installed on the drum fixing assembly (13), which can effectively intercept the suction heads leaving the inside of the drum (12).

9. The double-screw pipette tip arranging device according to claim 8, wherein, The twin-screw feeding mechanism (2) further includes a suction head dropping and feeding port (24) installed on the fixing plate (21) and disposed below the twin-screw arrangement assembly (23). The suction head dropping and feeding port (24) corresponds to the hole position of the suction head blanking hole (239), and plays a role of guiding and correcting the posture at the moment when the suction head drops.

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