A reaction cup clamping and mixing device

Abstract

This utility model relates to the field of medical device technology, specifically disclosing a reaction cup clamping and mixing device. It includes a clamping mechanism with a clamping cavity for clamping the reaction cup, an eccentric mixing mechanism connected to the clamping mechanism, and a driving mechanism that is convexly connected to and eccentrically positioned relative to the eccentric mixing mechanism. The eccentric mixing mechanism includes a base connected to the clamping mechanism, a transmission structure with one end convexly engaged with the base and the other end eccentrically positioned relative to the driving mechanism, and a vertically positioned metal elastic sheet connected to both the driving mechanism and the base. This utility model effectively achieves the functions of gripping, positioning, and mixing the reaction cup. By utilizing the stiffness difference of the metal elastic sheet in different directions, it addresses the different stiffness requirements during mixing and cup gripping. Compared to existing technologies, it simplifies the structure, reduces volume, lowers costs, and facilitates maintenance; it also improves mixing consistency.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and more specifically, to a reaction cup clamping and mixing device. Background Technology

[0002] In existing technologies, the following two methods are mainly used for mixing reaction vessels: Option 1 uses a large amplitude combined with a low rotation speed to generate a certain degree of eddy current in the liquid to be mixed in the reaction vessel. That is, a motor drives an eccentric shaft to rotate, and the eccentric shaft drives a set of motion mechanisms. A spring claw is installed at the output end of the motion mechanism, thereby driving the reaction vessel and its internal liquid to rotate and generate eddy current. For example, Chinese patent with publication number CN218546755U has a relatively complex mixing structure and high cost; there are many parts, making maintenance difficult.

[0003] Option 2 uses a smaller amplitude combined with a higher rotation speed to generate a certain degree of eddy current in the liquid to be mixed in the reaction vessel. This involves using a vibrating motor to drive a spring-loaded support, with the spring flexibly connected to the frame. The spring is installed at the end of the support, and high-frequency vibration causes the reaction vessel and its internal liquid to rotate, generating eddy current. However, as shown in Chinese patent CN220207238U, its mixing structure suffers from poor mixing consistency due to numerous uncertainties in the power transmission process of the vibrating motor (hardness of the flexible connector, resistance between structural components, etc.), ultimately leading to inconsistent instrument test results. It requires an additional positioning structure to overcome the reaction force on the mechanism when gripping the vessel; the structure has a large number of parts, resulting in higher costs and difficulties in maintenance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a reaction cup clamping and mixing device; it can effectively realize the functions of gripping, positioning and mixing reaction cups. It adopts the stiffness difference of metal elastic sheet in different directions to realize different stiffness requirements during mixing and gripping of cups; compared with the prior art, it simplifies the structure, reduces the volume, lowers the cost, and is easy to maintain; it also improves the mixing consistency.

[0005] The solution adopted by this utility model to solve the technical problem is: A reaction cup clamping and mixing device includes a clamping mechanism for clamping the reaction cup and having a clamping cavity, an eccentric mixing mechanism connected to the clamping mechanism, and a driving mechanism that is drively connected to the eccentric mixing mechanism and is eccentrically arranged with the eccentric mixing mechanism. The eccentric mixing mechanism includes a base for mounting the clamping mechanism, a transmission structure with one end connected to the base and the other end eccentrically positioned with the drive mechanism, and a vertically positioned metal elastic sheet connected to the drive mechanism and the base respectively. In use, the clamping mechanism clamps the reaction cup, and the drive mechanism controls the transmission structure to rotate, thereby driving the base to move. This, in turn, causes the clamping mechanism connected to the base and holding the reaction cup to move, thus achieving the mixing action. During mixing, the metal elastic sheet is forced to undergo torsional and bending deformation under the drive mechanism, providing degrees of freedom for the mixing action. When clamping the reaction cup, the vertically set metal elastic sheet has a certain rigidity in the up-down and left-right directions, which can keep the clamping mechanism in the correct position.

[0006] In some possible implementations, in order to effectively drive the clamping mechanism holding the reaction cup to move through the transmission structure to achieve the mixing action, the transmission structure includes a bearing mounted on the base and rotating with the base, an eccentric shaft with one end connected to the bearing and the other end connected to the drive mechanism; the center of the clamping cavity and the center of the bearing are on the same straight line.

[0007] In some possible implementations, in order to effectively connect the drive mechanism with the metal elastic sheet and the transmission structure, the drive mechanism includes a bracket connected to the metal elastic sheet and located above the base, a drive motor mounted on the bracket and with its output shaft arranged vertically, and the output shaft of the drive motor passing through the bracket and connected to an eccentric shaft.

[0008] In some possible implementations, the eccentric shaft includes a sleeve coaxially connected to the drive motor, and a shaft disposed at the bottom of the sleeve and eccentrically disposed with respect to the sleeve; the shaft is coaxially disposed with a bearing; the bearing is a ball bearing or a rolling bearing.

[0009] In some possible implementations, when the bearing is a ball bearing, the center of the ball bearing is coaxial with the axis of the shaft.

[0010] In some possible implementations, when the bearing is a rolling bearing, the end of the shaft away from the drive motor is located on the inner ring of the bearing and is coaxially arranged; the shaft and the inner ring of the bearing are clearance-fitted.

[0011] In some possible implementations, in order to effectively utilize the mixing action and make it easier for the liquid in the reaction vessel to form a vortex, thereby greatly improving the mixing efficiency; the metal elastic sheet is arranged vertically and located between the clamping mechanism and the transmission structure; a vertical mounting surface for mounting the metal elastic sheet 23 is provided on the base; the distance between the vertical mounting surface and the center of the clamping mechanism is A, and the distance between the vertical mounting surface and the center of the bearing is B, where A=B.

[0012] In some possible implementations, in order to effectively achieve shutdown and reset, a photoelectric sensor is installed on the bracket, and a photoelectric baffle that works in conjunction with the photoelectric sensor is provided on the outside of the eccentric shaft.

[0013] In some possible implementations, in order to effectively clamp the reaction cup using a clamping mechanism, the clamping mechanism includes two sets of vertically symmetrically arranged spring claw fingers mounted on a base, and tension springs connected at both ends to the two sets of spring claw fingers respectively. The two sets of spring claw fingers are close to each other on one side to form a clamping cavity.

[0014] In some possible implementations, in order to effectively enable the device to grasp and release the cup, a moving mechanism connected to the drive mechanism and used to control the movement of the drive mechanism, the eccentric mixing mechanism, and the clamping mechanism is also included.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention effectively achieves the mixing of liquids in the reaction vessel through the cooperation of a clamping mechanism, a transmission structure, and a driving mechanism. This invention effectively controls the rotational position of the shaft by using a photoelectric sensor and a photoelectric baffle, so that in the initial state, the shaft is located on the side closer to the clamping mechanism, thereby overcoming the relatively large reaction force in the cup gripping direction; in conjunction with the vertically arranged metal elastic sheet, it can maintain high structural rigidity in other directions, preventing the position of the clamping mechanism from changing when gripping the cup; This invention, through the setting of a metal elastic sheet, can withstand slight elastic deformation and alternating stress with extremely high cycles, thereby providing freedom for the mixing action and ensuring that the clamping mechanism can maintain the correct position when gripping the cup. This utility model has a simple structure and is highly practical. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a cross-sectional view of the present invention; Among them: 1. Clamping mechanism; 11. Spring-loaded claw fingers; 12. Tension spring; 13. Clamping cavity; 111. Slot; 2. Eccentric mixing mechanism; 21. Base; 211. Vertical mounting surface; 22. Transmission structure; 221. Bearing; 2211. Ball head bearing; 222. Eccentric shaft; 2221. Sleeve; 2222. Shaft; 23. Metal elastic sheet; 3. Drive mechanism; 31. Bracket; 32. Drive motor; 4. Photoelectric sensor; 5. Photoelectric baffle. Detailed Implementation

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the existence of at least one. In the implementation of this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more. For example, multiple positioning posts refer to two or more positioning posts. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] The present invention will now be described in detail.

[0019] like Figures 1-3 As shown, the axis of the output shaft of the drive motor 32 described in this utility model is vertical, which is the Z-axis direction; the length direction of the base 21 is the X-axis direction; and the axial direction of the tension spring 13 is the Y-axis direction. A reaction vessel clamping and mixing device includes a clamping mechanism 1 for clamping a reaction vessel 10 and having a clamping cavity 12, an eccentric mixing mechanism 2 for mounting the clamping mechanism, a drive mechanism 3 that is drively connected to the eccentric mixing mechanism 2 and is eccentrically arranged with the eccentric mixing mechanism 2, and a moving mechanism connected to the drive mechanism 3 and used to control the movement of the drive mechanism 3, the eccentric mixing mechanism 2 and the clamping mechanism 1; the movement here includes vertical movement and horizontal movement, and can be operated by a robotic arm in the prior art, the internal structure of which will not be described in detail here; The eccentric mixing mechanism 2 includes a base 21 connected to the clamping mechanism 1, a transmission structure 22 with one end connected to the base 21 and the other end eccentrically connected to the drive mechanism 3, and a vertically arranged metal elastic sheet 23 connected to the drive mechanism 3 and the base 21 respectively; the drive mechanism 3 is located above the base 21, and the vertically arranged metal elastic sheet 23 connects the drive mechanism 3 and the base 21. Preferably, the metal elastic sheet 23 is made of spring steel and has a rectangular structure with a thickness of less than or equal to 0.3 mm. On the one hand, it can withstand slight elastic deformation, and on the other hand, it can withstand alternating stress with a very high number of cycles, thereby providing freedom for the mixing action and ensuring that the clamping mechanism 1 can maintain the correct position when gripping the cup. Reaction cup 10 clamping: The clamping mechanism 1 is moved to the reaction cup 10 placement area by the moving mechanism, and then a group of reaction cups 10 are clamped by the clamping mechanism 1. Then, the mixture is moved to the designated position. When the reaction cup 10 is clamped, the vertically set metal elastic sheet 23 has a certain rigidity in the up and down direction and the left and right direction, which can keep the clamping mechanism 1 in the correct position. Mixing of reaction cup 10: After the clamping mechanism 1 clamps the reaction cup 10 and moves it to the designated position, the moving mechanism stops driving; the driving mechanism 3 controls the transmission structure 22 to rotate around the Z-axis. Since the transmission structure 22 and the driving mechanism 3 are eccentrically set, they drive the base 21 to move, so that the clamping mechanism 1 connected to the base 21 and clamping the reaction cup 10 moves, thereby realizing the mixing action; during the mixing, since the metal elastic sheet 23 is connected to the driving mechanism 3 and the base 21, the metal elastic sheet 23 will be forced to undergo torsional deformation and bending deformation under the drive of the driving mechanism 3, providing freedom for the mixing action.

[0020] In some possible implementations, in order to effectively drive the clamping mechanism 1 holding the reaction cup 10 to move through the transmission structure 22 to achieve the mixing action, the transmission structure 22 includes a bearing 221 mounted on the base 21 and rotatably engaged with the base 21, and an eccentric shaft 222 with one end connected to the bearing 221 and the other end connected to the drive mechanism 3. The eccentric shaft 222 includes a sleeve 2221 coaxially connected to the drive motor 32, and a shaft 2222 disposed at the bottom of the sleeve 2221 and eccentrically disposed with the sleeve 2221. The center of the clamping cavity 12 is on the same straight line as the center of the bearing 221. The shaft 2222 is coaxially disposed with the bearing 221. The base 21 is provided with mounting holes for mounting the bearing 221.

[0021] In one embodiment, the bearing 221 is a ball bearing 2211, with the center of the ball bearing 2211 coaxially arranged with the axis of the shaft 2222 to form a rotating pair. The ball head of the ball bearing 2211 is connected to the shaft 2222, and the axis of the shaft 2222 is coaxial with the center of the ball head. The ball bearing 2211 is used in conjunction with the base 21, so that under the drive of the eccentric shaft 222, the base 21 and the ball bearing 2211 can move accordingly, thereby driving the clamping mechanism 1 to move and realize the mixing action. In another embodiment, the bearing 221 is a rolling bearing, and the end of the shaft 2222 away from the drive motor 32 is located in the inner ring of the bearing 221 and is coaxially arranged; the shaft 2222 and the inner ring of the bearing 221 are clearance-fitted; since the rolling bearing can only rotate around the Z-axis, the clearance fit between the outer side of the shaft 2222 and the inner ring of the bearing 221 is used to effectively correct the deviation of the angle between the shaft 2222 and the inner ring during mixing, so that there is no jamming during mixing; The bottom of the shaft 2222 is connected to the rolling bearing by bolts and washers. Specifically, the outer diameter of the washer is larger than the outer diameter of the shaft 2222. One end of the bolt passes through the washer and is coaxially connected to the bottom of the shaft 2222 to prevent the shaft 2222 from falling off the rolling bearing.

[0022] In some possible implementations, in order to effectively connect the drive mechanism 3 with the metal elastic sheet 23 and the transmission structure 22, the drive mechanism 3 includes a bracket 31 connected to the metal elastic sheet 23 and located above the base 21, and a drive motor 32 mounted on the bracket 31 with its output shaft arranged vertically. The output shaft of the drive motor 32 passes through the bracket 31 and is coaxially connected to the sleeve 2221 of the eccentric shaft 222.

[0023] During mixing, the output shaft of the drive motor 32 rotates around the Z-axis and transmits power to the clamping mechanism 1 on the base 21 through the eccentric shaft 222 and the bearing 221; ultimately, it drives the liquid in the reaction cup 10 to form a vortex to achieve mixing. The entire process is a rigid structural connection, and the state is stable, which can improve the consistency of mixing. like Figure 1 , Figure 2 As shown, in the initial state, the shaft 2222 in the eccentric shaft 222 is located at the leftmost position. The leftmost position is when the shaft 2222 rotates to be close to the clamping mechanism 1 and the axis of the shaft 2222 and the center of the clamping cavity 12 are on the same vertical plane. This position is the dead point position, and the clamping mechanism 1 forms a self-locking mechanism, which can overcome the relatively large reaction force in the cup gripping direction when gripping the cup. With the help of the vertically arranged metal elastic sheet 23, it can maintain high structural rigidity in other directions and prevent the position of the clamping mechanism 1 from changing when gripping the cup.

[0024] In some possible implementations, to effectively utilize the mixing action and make it easier for the liquid in the reaction cup 10 to form vortices, thereby greatly improving the mixing efficiency, the metal elastic sheet 23 is arranged vertically and located between the clamping mechanism 1 and the transmission structure 22; a vertical mounting surface 211 for mounting the metal elastic sheet 23 is provided on the base 21; the distance between the vertical mounting surface 211 and the center of the clamping mechanism 1 is A, and the distance between the vertical mounting surface 211 and the center of the bearing 221 is B, where A=B; with this arrangement, the movement trajectory of the clamping mechanism 1 is circular, making it easier to form vortices during mixing, thereby improving the mixing efficiency; Specifically, the metal elastic sheet 23 is connected to the base 21 and the bracket 31 by bolts. An installation part is provided above the base 21. The installation part is located on the side of the base 21 near the clamping mechanism 1 and is integrally formed with the base. The side of the installation part near the transmission structure 22 serves as a vertical installation surface 211 to connect the metal elastic sheet 23 and the base 21, so that the metal elastic sheet 23 is vertically arranged and perpendicular to the base 21.

[0025] In some possible implementations, in order to effectively achieve shutdown and reset, a photoelectric sensor 4 is installed on the bracket 31, and a photoelectric baffle 5 that works in conjunction with the photoelectric sensor 4 is provided on the outside of the eccentric shaft 222. Specifically, the photoelectric sensor 4 is an existing product, and its internal structure will not be described in detail here; Specifically, the photoelectric baffle 5 is installed on the outside of the sleeve 2221 and cooperates with the photoelectric sensor 4 installed on the bracket 31; when the light signal emitted by the photoelectric sensor 4 is blocked by a certain designated position of the photoelectric baffle 5, it is identified as the initial position, which is also the reset position after mixing; through this setting, after each group of reaction cups 10 is mixed, the two cooperate to realize the reset of the drive motor 32. Specifically, the reset position is when the shaft 2222 is located on the side close to the metal elastic sheet 23 and its axis is in the same vertical plane as the center of the clamping mechanism 1, which is the dead point position mentioned above.

[0026] In some possible implementations, to effectively clamp the reaction cup 10 using the clamping mechanism 1, the clamping mechanism 1 includes two sets of vertically symmetrically arranged spring claw fingers 11 that rotate around the Z-axis with the base 21, and tension springs 13 connected at both ends to the two sets of spring claw fingers 11 respectively. The axial direction of the tension springs 13 is along the Y-axis. The two sets of spring claw fingers 11 form a clamping cavity 12 by approaching each other on one side. A slot 111 is provided on the side of the two sets of spring claw fingers 11 away from the base 21, and the opening of the slot 111 is located on the side away from the base 21. The slot 111 is connected to the clamping cavity 12. When gripping the reaction cup 10, the reaction cup 10 is first inserted into the slot 111, then enters the clamping cavity 12, and finally the tension springs 13 are used to convert the force into a clamping force to grip the reaction cup 10, thereby effectively clamping the reaction cup 10 in the clamping cavity 12 and preventing it from falling off during mixing. Of course, the two sets of spring claw fingers 11 can also slide with the base 21 in the Y-axis direction, thereby changing the size of the clamping cavity 12 and effectively clamping the reaction cup 10 under the force of the tension spring 13.

[0027] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A reaction vessel clamping and mixing device, characterized in that, It includes a clamping mechanism for holding a reaction cup and having a clamping cavity, an eccentric mixing mechanism connected to the clamping mechanism, and a drive mechanism that is drively connected to the eccentric mixing mechanism and is eccentrically arranged with the eccentric mixing mechanism. The eccentric mixing mechanism includes a base for mounting the clamping mechanism, a transmission structure with one end connected to the base and the other end eccentrically positioned with the drive mechanism, and a vertically positioned metal elastic sheet connected to both the drive mechanism and the base.

2. The reaction cup clamping and mixing device according to claim 1, characterized in that, The transmission structure includes a bearing mounted on a base and rotatably engaged with the base, and an eccentric shaft with one end connected to the bearing and the other end connected to the drive mechanism; the center of the clamping cavity is on the same straight line as the center of the bearing.

3. The reaction cup clamping and mixing device according to claim 2, characterized in that, The drive mechanism includes a bracket connected to a metal elastic sheet and located above the base, and a drive motor mounted on the bracket with its output shaft arranged vertically. The output shaft of the drive motor passes through the bracket and is connected to an eccentric shaft.

4. The reaction cup clamping and mixing device according to claim 2, characterized in that, The eccentric shaft includes a sleeve coaxially connected to the drive motor, and a shaft disposed at the bottom of the sleeve and eccentrically disposed with respect to the sleeve; the shaft is coaxially disposed with a bearing; the bearing is a ball bearing or a rolling bearing.

5. The reaction cup clamping and mixing device according to claim 4, characterized in that, When the bearing is a ball bearing, the center of the ball bearing is coaxial with the axis of the shaft.

6. The reaction cup clamping and mixing device according to claim 4, characterized in that, When the bearing is a rolling bearing, the end of the shaft away from the drive motor is located on the inner ring of the bearing and is coaxially arranged; the shaft and the inner ring of the bearing are clearance fitted.

7. A reaction cup clamping and mixing device according to any one of claims 2-6, characterized in that, The metal elastic sheet is arranged vertically and located between the clamping mechanism and the transmission structure; a vertical mounting surface for mounting the metal elastic sheet is provided on the base; the distance between the vertical mounting surface and the center of the clamping mechanism is A, and the distance between the vertical mounting surface and the center of the bearing is B, where A=B.

8. The reaction cup clamping and mixing device according to claim 3, characterized in that, A photoelectric sensor is mounted on the bracket, and a photoelectric baffle that works in conjunction with the photoelectric sensor is provided on the outside of the eccentric shaft.

9. The reaction cup clamping and mixing device according to claim 1, characterized in that, The clamping mechanism includes two sets of spring claw fingers arranged symmetrically along the vertical direction and mounted on the base, and tension springs connected at both ends to the two sets of spring claw fingers respectively. The two sets of spring claw fingers are close to each other on one side to form a clamping cavity.

10. The reaction cup clamping and mixing device according to claim 1, characterized in that, It also includes a moving mechanism connected to the drive mechanism and used to control the movement of the drive mechanism, the eccentric mixing mechanism, and the clamping mechanism.

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