Automatic uniform mixing device

Abstract

The utility model discloses an automatic blending device which comprises a base, a blending motor and a motor fixing plate, a guide block is arranged at one end of the motor fixing plate, and a sliding groove is formed in the guide block; a bearing seat is arranged above the motor fixing plate; the linear cup seat is fixed on the upper surface of the bearing seat; and a bearing roller is mounted at one end of the bearing seat and is embedded into the sliding chute. While the uniform mixing effect of the reaction cup is ensured, the swinging amplitude of the movement of the reaction cup can be limited, and a reagent in the reaction cup is prevented from splashing.

Description

Technical Field

[0001] The utility model relates to the field of material mixing in medical equipment, in particular to an automatic mixing device. Background Art

[0002] In the medical field, to ensure sufficient reaction between reagents, they often need to be shaken after mixing. Therefore, shaking has become a common and necessary reaction step in the medical field. In the experimental process of fully automatic medical equipment, the mixing of reagents is inevitable and occurs frequently, so the automatic mixing function has become a key function of fully automatic medical equipment. In this automatic mixing function, the aspiration and exhalation function of the sample needle is generally used to repeatedly draw the mixed liquid into the sample needle and then expel it to achieve the purpose of mixing. However, this is generally inefficient and seriously affects the progress of the experimental process. Secondly, the surface of the sample needle is prone to residual mixed liquid, which needs to be cleaned after mixing, which adds experimental steps. If the cleaning is not thorough, it will increase the risk of the experiment and affect the experimental results.

[0003] China Patent Publication No. CN218795448U, Publication Date April 7, 2023, the name of the utility model is a mixing device for a reaction cup 12.3 for a chemiluminescent immunoassay instrument. The application discloses a mixing device for a reaction cup for a chemiluminescent immunoassay instrument, including a load-bearing plate with several legs 1.2, the upper surface of the load-bearing plate is rotatably mounted with a driving wheel and a driven wheel, a synchronous belt is tensioned on the driving wheel and the driven wheel, the upper surface of the load-bearing plate is horizontally mounted with a cross plate through several pillars, the upper surface of the cross plate is rotatably mounted with a driving turntable and a driven turntable, a mixing cup holder is installed, the driving turntable is connected to the driven wheel, and the lower surface of the load-bearing plate is mounted with a motor connected to the driving wheel. Although this design can mix the reaction solution, it has certain limitations. Since the device lacks a limiting device for mixing and rotating the reaction cup, it may cause the reagent in the reaction cup to splash, which may pose a threat to the safety of the experimenter and may also cause inaccurate experimental data because splashing may cause loss of reagent volume, affecting the repeatability and accuracy of the experiment. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic mixing device, which solves the problems of the prior art reaction cup mixing device being complicated and lacking a limiting device for mixing rotation by providing a guide block and a bearing roller embedded in a slide groove, and provides a device that can automatically mix the reagents independently after mixing without relying on a sample injection needle.

[0005] To address the aforementioned technical issues, the present invention employs the following technical solution: an automatic mixing device comprising a base, a mixing motor, and a motor mounting plate. A guide block is provided at one end of the motor mounting plate, with a slide groove within the guide block. A bearing seat is positioned above the motor mounting plate, with a linear cup seat secured to its upper surface. A bearing roller is mounted at one end of the bearing seat, embedded in the slide groove. While ensuring effective mixing of the reaction cuvette, this invention also limits the amplitude of the reaction cuvette's movement, preventing reagent splashing within the cuvette.

[0006] Preferably, the cross section of the bearing seat is L-shaped, with the bearing roller installed at one end and the eccentric wheel shaft connected at the other end. The L-shaped design leaves space for the installation of the guide wheel, making it easier for the bearing roller to fit in the guide block slot.

[0007] Preferably, the guide block is located below the bearing seat, with the eccentric wheel shaft away from the side of the mixing motor, so that the space utilization of the mixing device is more reasonable and the movement of the bearing seat is conveniently restricted.

[0008] Preferably, the upper end of the eccentric shaft is fixed to the bearing seat via a flange bearing, and the lower end is fixed to the motor fixing plate via a flange bearing. This fixing method can ensure the stability of the eccentric shaft during high-speed rotation, reduce wear caused by shaft vibration or deviation, and extend the service life of the equipment.

[0009] Preferably, the eccentric shaft mounting seat is located between the bearing seat and the motor fixing plate. This layout can make the installation of the eccentric shaft easier and provide better axial support, ensuring the stability and reliability of the mixing device during operation.

[0010] Preferably, the linear cup holder is provided with a plurality of reaction cup positions, and mounting bases are provided on both sides of the lower end. This design can make the placement of the reaction cup more stable, reduce the possibility of tipping or shifting during the mixing process, and also facilitate the loading and unloading and cleaning of the reaction cup.

[0011] Preferably, the lower end of the eccentric wheel shaft passes through the motor fixing plate and is equipped with a driven wheel, and the motor shaft of the mixing motor passes through the motor fixing plate and is equipped with a driving wheel. This design of the driving wheel and the driven wheel can ensure the transmission efficiency of the mixing device, reduce energy loss, and improve mixing efficiency.

[0012] Preferably, a zero plate is provided on the driving wheel, and a synchronous belt is tensioned between the driving wheel and the driven wheel. The zero plate and the zero switch restore the position of the linear cup holder to prevent positional misalignment, ensuring accurate positioning of the mixing device during startup and shutdown, avoiding errors caused by startup impact or rebound during shutdown, and improving mixing accuracy.

[0013] Preferably, the diameter of the driving wheel is larger than that of the driven wheel. This design can provide a larger transmission ratio, allowing the mixing device to achieve effective mixing at a lower speed, while reducing noise and wear of the device, increasing the service life of the device and operating comfort.

[0014] Beneficial effects of the utility model: The utility model provides a guide block and a bearing roller embedded in the guide block slide groove, so the mixing device has a simple structure and occupies little space. It can limit the movement and swing amplitude of the reaction cup, improve the experimental efficiency, and the stable mixing effect makes the experimental results more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of an automatic mixing device of the present utility model.

[0016] Figure 2 This is a schematic structural diagram of the driving wheel and the driven wheel of the utility model.

[0017] Figure 3 This is a cross-sectional view of the bearing seat and guide block of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the eccentric wheel shaft of the utility model.

[0019] Figure 5 This is a schematic diagram of the linear cup holder structure of the present utility model.

[0020] Figure markings: 1: base; 1.1: base plate; 1.2: support leg; 1.3: mixing support column; 2: mixing motor; 2.2: motor fixing plate; 2.3: motor shaft; 3: zero position plate; 3.1: zero position switch; 3.2: zero position switch bracket; 4: driving wheel; 5: driven wheel; 6: synchronous belt; 7: eccentric wheel shaft; 7.1: shaft neck; 7.2: upper shaft; 7.2.1: slot; 7.3: lower shaft; 7.3.1: thread; 8: flange bearing; 9: nut; 10: bearing seat; 10.1: bearing roller; 11: guide block; 11.1: slide groove; 12: linear cup seat; 12.1: mounting seat; 12.2: reaction cup position; 12.3: reaction cup. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figure 1As shown, the present invention includes a base 1, a base plate 1.1, legs 1.2, a mixing motor 2, a motor fixing plate 2.2, and a mixing support column 1.3. The base 1 is the foundation of the entire mixing device and needs to be strong enough to support the weight of the entire device and ensure stability during the mixing process. The base 1 is rectangular in shape, with legs 1.2 at the four corners. The legs 1.2 are L-shaped and bend at the ground, with the lower ends contacting the ground. The base 1 is usually made of metal materials such as stainless steel or aluminum alloy. These materials are not only strong but also have good corrosion resistance. The base 1 ensures that it will not overturn during high-speed mixing. The base plate 1.1 is installed on the upper surface of the base 1. The shape and size of the base plate 1.1 are the same as those of the base 1. The four corners of the base plate 1.1 are installed with mixing support columns 1.3. The mixing support columns 1.3 are rectangular, with the lower ends connected to the base plate 1.1 and the upper ends connected and fixed to the motor fixing plate 2.2, leaving space for the setting of the driving wheel 4 and the driven wheel 5. The motor fixing plate 2.2 is an important component that connects the mixing motor 2 and the bearing seat 10. It is usually made of sturdy engineering plastics or metal materials to ensure stability during the mixing process. The design of the motor fixing plate 2.2 takes into account the installation of the motor, eccentric shaft, and guide block 11, and different mounting holes are set to facilitate the installation of components thereon. The mixing motor 2 is installed on the right side of the upper surface of the motor fixing plate 2.2. The mixing motor 2 is the core component that drives the entire mixing device. According to the design requirements of the mixing device, the mixing motor 2 needs to provide sufficient torque and speed. The motor provides a power source to the mixing device. A brushless DC motor can be used. This motor has the advantages of high efficiency, low noise, and long life. It is very suitable for use in the mixing device. The power and speed of the motor can be adjusted according to actual needs to meet the requirements of different mixing tasks.

[0023] like Figure 1 、 Figure 4 and Figure 4As shown, the eccentric shaft 7 is a key component for transmitting the power of the mixing motor 2. It not only transmits the power of the mixing motor 2, but also realizes the conversion of reciprocating rotary motion through its unique eccentric design. The upper shaft 7.2 and the lower shaft 7.3 of the eccentric shaft are respectively located on the upper surface and the lower surface of the shaft neck 7.1. The axes are parallel and do not overlap, and can generate the expected centrifugal force during rotation, thereby realizing the specific motion mode of the mixing device. This precise dynamic balance design enables the mixing device to remain stable during high-speed operation, reduce vibration, and improve the mixing effect. A mounting hole is provided in the end of the bearing seat 10 close to the mixing motor 2 for fixing the flange bearing 8. The stacked height of the two flange bearings 8 is equal to the thickness of the bearing seat 10. The two flange bearings 8 are clamped into the mounting hole to provide stable support for the upper shaft 7.2 of the eccentric shaft 7. The upper shaft 7.2 of the eccentric shaft 7 passes through the inner hole of the bearing. The upper shaft 7.2 of the eccentric shaft is provided with a slot 7.2.1 away from the shaft neck 7.1. After it is placed in place, the slot 7.2.1 part is exposed from the bearing seat 10, and the clamp is clamped into the slot 7.2.1, so that the clamp and the flange bearing 8 in the bearing seat 10 are limited and abutted, thereby improving the connection stability between the bearing seat 10 and the eccentric shaft. This connection method not only ensures reliability during the mixing process, but also makes maintenance and replacement work easier. The lower shaft 7.3 of the eccentric shaft 7 passes through the motor fixing plate 2.2. The motor fixing plate 2.2 is provided with a mounting hole below the bearing seat 10 for fixing the other two flange bearings 8. The stacked height of the two flange bearings 8 is slightly greater than the thickness of the motor fixing plate 2.2. The two flange bearings 8 are clamped into the mounting holes, and the lower shaft 7.3 of the eccentric shaft 7 is fixed in the motor fixing plate 2.2 through the flange bearings 8, ensuring the stability and reliability of the lower shaft 7.3 part. The journal 7.1 of the eccentric shaft 7 is clamped between the bearing seat 10 and the motor fixing plate 2.2. The advantage of this fixing method is that it can effectively reduce wear caused by vibration or deviation of the shaft, thereby extending the service life of the equipment. During the long-term use of the mixing device, this design can reduce maintenance costs and improve work efficiency. In addition, the matching design of the bearing seat 10 and the motor fixing plate 2.2 also helps to disperse the forces acting on the shaft, reduce local stress concentration, and further improve the durability and reliability of the entire mixing device.

[0024] like Figure 1 、 Figure 2 and Figure 3As shown, the lower shaft 7.3 of the eccentric shaft 7 passes through the motor fixing plate 2.2 and is equipped with a driven wheel 5. The driven wheel 5 is fixed by a nut 9. This nut 9 cooperates with the thread 7.3.1 at the bottom end of the lower shaft 7.3 of the eccentric shaft 7 to ensure the stable positioning of the driven wheel 5. The design of this thread 7.3.1 not only provides a strong tightening force, but also can maintain its tightening performance during long-term use, reducing position deviation caused by vibration or wear. The motor shaft 2.3 of the mixing motor 2 passes through the motor fixing plate 2.2 and is equipped with a driving wheel 4. The driving wheel 4 is fixed to the bottom end of the motor shaft 2.3. This design of the driving wheel 4 and the driven wheel 5 ensures that the power of the motor can be directly transmitted to the driving wheel 4, ensuring the transmission efficiency of the mixing device, reducing energy loss and improving the mixing efficiency. The driving wheel 4 and the driven wheel 5 are at the same height and in the same horizontal plane. This horizontal alignment design helps to ensure that the tension of the synchronous belt 6 is consistent, thereby improving the transmission efficiency and stability of the mixing device. The diameter of the driving pulley 4 is larger than that of the driven pulley 5. This design provides a larger transmission ratio, allowing the mixing device to achieve effective mixing even at lower speeds. It also reduces noise and wear, improving the device's service life and operating comfort. A synchronous belt 6 is tensioned on the driving pulley 4 and the driven pulley 5. The mixing motor 2 drives the motor shaft 2.3, which in turn drives the driving pulley 4, which in turn drives the driven pulley 5 via the synchronous belt 6. This design ensures the transmission efficiency and stability of the mixing device. A zeroing plate 3 is provided on the driving pulley 4. The zeroing plate 3 is in contact with the lower surface of the driving pulley 4, with one end connected to the driving pulley 4 and the other end connected to a zeroing switch 3.1. The zeroing switch 3.1 is mounted on a zeroing switch bracket located on the right outer side of the base 1, symmetrically along the line connecting the lower eccentric shaft 7.3 and the motor shaft 2.3. This facilitates operation by the experimenter and makes adjustment of the zeroing switch 3.1 more intuitive and convenient. The zero plate 3, in conjunction with the zero switch 3.1, restores the linear cup holder 12 to its original position, preventing misalignment. This design ensures precise positioning of the mixing device during startup and shutdown, avoiding errors caused by startup shock or rebound during shutdown, and improving mixing accuracy. Furthermore, this design offers self-diagnosis and self-correction capabilities. If a mixing device malfunction occurs, the zero switch 3.1 can be used to promptly pause the device. This intelligent design significantly improves the reliability and safety of the mixing device and reduces the risks associated with equipment failure.

[0025] like Figure 1 and Figure 3The bearing seat 10 shown plays a core role in the automatic mixing device. It is not only a key component supporting the linear cup holder 12, but also ensures that the linear cup holder 12 can rotate smoothly during the mixing process. The bearing seat 10 is typically made of high-strength engineering plastic or metal to ensure its stability during high-speed rotation. The bearing seat 10 has an L-shaped cross-section, which reserves space for the installation of the guide block 11. One end is connected to the upper shaft 7.2 of the eccentric shaft 7 via a flange bearing 8. The use of the flange bearing 8 also helps to distribute the load on the bearing seat 10, reducing local stress concentration, thereby extending the service life of the bearing seat 10. A mounting hole is provided at the end away from the mixing motor 2, and a bearing roller 10.1 is fixed in the mounting hole. The bearing roller 10.1 is a key component that cooperates with the guide block 11 guide slot 11.1. It is typically made of wear-resistant polyurethane material. This material not only has excellent wear resistance but also has good shock absorption properties. It can effectively absorb the vibration and impact generated during the mixing process, ensuring stability and wear resistance during long-term operation. Bearing roller 10.1 has a T-shaped cross-section, with its upper end connected to bearing seat 10 and its lower end slidably inserted into slot 11.1 of guide block 11. Bearing roller 10.1 is embedded in slot 11.1 of guide block 11 and can slide within it. This design not only limits the swinging motion of cuvette 12.3 during mixing, but also improves the stability and effectiveness of the mixing device. By precisely controlling the swinging motion of cuvette 12.3, reagent splashing and uneven mixing caused by excessive swinging can be avoided, ensuring experimental accuracy and repeatability.

[0026] The guide block 11 is a crucial component in the automatic mixing device. Its function is to provide a precise guide for the bearing roller 10.1 to ensure that it can move smoothly along a predetermined trajectory during the mixing process. A chute 11.1 is provided in the guide block 11 to guide the movement of the bearing roller 10.1. The guide block 11 is usually made of hard engineering plastics or metal to ensure its wear resistance and stability in long-term operation. The chute 11.1 is set on the central axis of the guide block 11. The lower end diameter of the bearing roller 10.1 is slightly smaller than the width of the chute 11.1, and the bearing roller 10.1 moves along the extension direction of the chute 11.1. In this embodiment, the guide block 11 is located below the bearing seat 10, the eccentric wheel shaft 7 is away from the side of the mixing motor 2, and one end of the motor fixing plate 2.2. This layout helps to limit the movement of the bearing seat 10 and improve the stability of the mixing device.

[0027] like Figure 5As shown, the linear cup holder 12 is a component for placing the reaction cup 12.3 and enabling it to rotate. The linear cup holder 12 is usually made of engineering plastic or stainless steel to ensure its stability and corrosion resistance during the mixing process. The linear cup holder 12 is mounted on the upper surface of the bearing seat 10. The main body of the linear cup holder 12 is rectangular and has four reaction cup positions 12.2 therein. The reaction cup positions 12.2 are used to place the reaction cups 12.3. The inner diameter of the reaction cup position 12.2 is slightly larger than the outer diameter of the reaction cup 12.3 to ensure that the reaction cup 12.3 can be firmly placed in the cup position. In this embodiment, mounting seats 12.1 are symmetrically provided on both sides of the lower end of the linear cup holder 12. The mounting seats 12.1 are provided with mounting holes and are fixed to the bearing seat 10 by screws. This design not only improves the stability of the reaction cup 12.3, but also facilitates the loading and unloading and cleaning of the reaction cup 12.3.

[0028] The working process of this utility model is as follows.

[0029] When the device is running, the robot places the reaction cup 12.3 into the linear cup holder 12, and the sample injection needle begins to add reagent. After the addition is completed, the mixing device begins to operate. The mixing motor 2 rotates, driving the driving wheel 4, which in turn drives the driven wheel 5 via the synchronous belt 6, thereby rotating the eccentric wheel shaft 7. The bearing seat 10 and the linear cup holder 12 mounted on the bearing seat 10 follow the eccentric wheel shaft 7 in eccentric motion, thereby fully shaking the reagent in the reaction cup 12.3. When the bearing seat 10 performs eccentric motion, the front bearing roller 10.1 moves back and forth within the groove of the guide block 11, limiting the amplitude of the movement and preventing the reagent in the reaction cup 12.3 from splashing. After the shaking is completed, the position of the linear cup holder 12 is restored via the zero plate 3 and the zero switch 3.1 to prevent positional misalignment. The linear cup holder 12 can be provided with multiple reaction cup positions 12.2, so that multiple reaction cups 12.3 can be shaken simultaneously, greatly increasing experimental efficiency.

[0030] The installation process of this utility model is as follows.

[0031] Install two flange bearings 8 into the bearing seat 10. Insert the upper end of the eccentric shaft 7 through the inner hole of the bearing. Once in place, secure it with a clamp. Place the linear cup holder 12 on top of the bearing seat 10 and secure it to the bearing seat 10 with screws. Install a bearing roller 10.1 in the threaded hole 7.3.1 at the front end of the bearing seat 10. Install the guide block 11 at the front end of the motor mounting plate 2.2. Install the flange bearing 8 in the corresponding position on the motor mounting plate 2.2. Then, insert the lower shaft 7.3 of the eccentric shaft 7 through the inner hole of the flange bearing 8 until it reaches the corresponding position. Simultaneously, fit the bearing roller 10.1 into the groove 11.1 of the guide block 11. Install the driven pulley 5 onto the lower shaft 7.3 of the eccentric shaft 7 and secure it with a nut 9. Install the mixing motor 2 in its corresponding position at the rear end of the motor mounting plate 2.2. Install a driving pulley 4 at the bottom end of the motor shaft 2.3 of the mixing motor 2. Install the zero plate 3 in the corresponding position on the mixing synchronous pulley. Connect the driving pulley 4 and the driven pulley 5 with a timing belt 6. Install the four mixing support columns 1.3 at the corresponding positions on the base plate 1.1. Install the zero position switch bracket with the zero position switch 3.1 at the rear end of the base plate 1.1. Then, install the motor fixing plate 2.2 onto the mixing support columns 1.3. Install the base plate 1.1 onto the base 1.

[0032] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An automatic mixing device, comprising a base, a mixing motor and a motor fixing plate, characterized in that: A guide block is provided at one end of the motor fixing plate, and a slide groove is provided in the guide block; A bearing seat is provided above the motor fixing plate, and the linear cup seat is fixed on the upper surface of the bearing seat; A bearing roller is installed at one end of the bearing seat, and the bearing roller is embedded in the slide groove.

2. An automatic mixing device according to claim 1, characterized in that: The cross section of the bearing seat is L-shaped, with a bearing roller installed at one end and an eccentric wheel shaft connected at the other end.

3. The automatic mixing device according to claim 1, wherein: The guide block is located below the bearing seat, and the eccentric wheel shaft is away from the side of the mixing motor.

4. An automatic mixing device according to claim 2 or 3, characterized in that: The upper end of the eccentric shaft is fixed in the bearing seat through a flange bearing, and the lower end is fixed in the motor fixing plate through a flange bearing.

5. An automatic mixing device according to claim 2 or 3, characterized in that: The journal of the eccentric shaft is located between the bearing seat and the motor fixing plate.

6. The automatic mixing device according to claim 1, wherein: There are several reaction cup positions in the linear cup holder, and mounting seats are provided on both sides of the lower end.

7. The automatic mixing device according to claim 5, characterized in that: The lower end of the eccentric wheel shaft passes through the motor fixing plate and is equipped with a driven wheel, and the motor shaft of the mixing motor passes through the motor fixing plate and is equipped with a driving wheel.

8. The automatic mixing device according to claim 7, characterized in that: A zero plate is provided on the driving wheel, and a synchronous belt is tensioned on the driving wheel and the driven wheel.

9. An automatic mixing device according to claim 7 or 8, characterized in that: The diameter of the driving wheel is larger than the diameter of the driven wheel.

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