A reaction cup clamping and mixing device

Abstract

This utility model relates to the field of medical device technology, and specifically discloses a reaction cup clamping and mixing device, including 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 pulsatorically connected to the eccentric mixing mechanism; the eccentric mixing mechanism includes a support base for mounting the clamping mechanism, an eccentric transmission structure with one end pulsatorically engaged with the support base and the other end connected to the driving mechanism and eccentrically arranged, and a movable structure disposed on the support base and connected to the driving mechanism to form a sliding pair; the movable structure is rotatably mounted on the support base.

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] For mixing reaction vessels, the conventional methods are as follows: Option 1: Use 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, use a motor to drive the eccentric shaft to rotate, and the eccentric shaft drives a set of motion mechanisms. The spring claw is installed at the output end of the motion mechanism, thereby driving the reaction vessel and the liquid inside it to rotate and generate eddy current. For example, Chinese patent CN218546755U discloses a sample analyzer and a clamping and mixing mechanism. The mixing structure is relatively complex and costly; it also has a large number of parts, making maintenance difficult.

[0003] Option 2: Using a smaller amplitude combined with a higher rotation speed to generate a certain degree of vortex in the liquid to be mixed within the reaction vessel. This involves using a vibratory motor to drive a claw mounting frame, with the claw flexibly connected to the frame. The claw is mounted at the end of the claw mounting frame, and high-frequency vibration causes the reaction vessel and its internal liquid to rotate, generating vortices.

[0004] Chinese patent CN220207238U discloses a clamping and mixing mechanism and a sampling device. Due to the many uncertainties in the power transmission process of the vibration motor (hardness of the flexible connector, resistance between structural components, etc.), the mixing consistency of this mixing mechanism is poor, which in turn leads to poor consistency of the instrument test results. It requires an additional positioning structure to overcome the reaction force on the mechanism when gripping the cup. The structure has a large number of parts, resulting in high cost and difficulty in maintenance. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a reaction cup clamping and mixing device; 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 pulsatorically connected to the eccentric mixing mechanism. The eccentric mixing mechanism includes a support base for mounting the clamping mechanism, an eccentric transmission structure with one end connected to the support base and the other end connected to the drive mechanism and eccentrically arranged, and a movable structure disposed on the support base and connected to the drive mechanism as a sliding pair. In this invention, the support base, the moving structure, and the eccentric transmission structure constitute a crank-slider mechanism. When the driving mechanism drives the transmission mechanism to rotate, it will drive the support base to move, thereby causing the reaction cup held by the clamping mechanism to move, so that the liquid in the reaction cup can be mixed evenly.

[0006] In some possible implementations, the movable structure includes a second rolling bearing mounted on a support base and an opening slot disposed at the bottom of the drive mechanism and along the length of the support base; the second rolling bearing is located within the opening slot and cooperates with the opening slot to form a sliding pair connection.

[0007] In some possible implementations, the movable structure includes a cylindrical pin mounted on a support base and an oblong hole disposed at the bottom of the drive mechanism and along the length of the support base; the long axis of the oblong hole is disposed along the length of the support base; the top of the cylindrical pin is located inside the oblong hole.

[0008] In some possible implementations, the eccentric transmission structure includes an eccentric wheel connected to a drive mechanism and a first rolling bearing mounted on a support and connected to the eccentric wheel as a rotating pair; the support is provided with a threaded hole for a second rolling bearing or a cylindrical pin and a mounting hole for mounting the first rolling bearing; the center of the threaded hole, the center of the mounting hole, and the center of the clamping cavity are on the same straight line.

[0009] In some possible implementations, the eccentric wheel includes a wheel body connected to a drive mechanism and an output rod connected to the wheel body and internally eccentrically arranged; the output rod is fitted within the inner ring of a first rolling bearing with a clearance fit.

[0010] In some possible implementations, the drive mechanism includes a mounting bracket with an opening slot or waist-shaped hole at the bottom, and a rotary motor mounted on the mounting bracket; the output shaft of the rotary motor passes through the mounting bracket and is coaxially connected to the wheel body.

[0011] In some possible implementations, a baffle is provided on the wheel body, and a photoelectric sensor that works in conjunction with the baffle is provided on the mounting bracket; when the baffle blocks the light emitted by the photoelectric sensor, the output rod is located on the side close to the clamping mechanism and the axis of the output rod, the center of the clamping cavity, and the center of the threaded hole are on the same plane.

[0012] In some possible implementations, the clamping mechanism includes two sets of symmetrically arranged and rotatably mounted on the bottom of the support base, an elastic element for connecting the two sets of clamps, and a stop bar disposed on the outside of the two sets of clamps; the two sets of clamps are close to each other to form a clamping cavity; the two sets of clamps are respectively engaged with the support base in a vertical rotational engagement.

[0013] In some possible implementations, the distance between the center of the threaded hole and the center of the clamping cavity is A, and the distance between the center of the threaded hole and the center of the mounting hole is B; A=B; the clamping cavity is located at the bottom of the support base and the center of the clamping cavity is on the same straight line as the axis of the second rolling bearing.

[0014] In some possible implementations, a rubber layer is provided on the outer side of the second rolling bearing or on the side where the cylindrical pin extends into the mounting bracket.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention can effectively achieve the mixing of liquid in the reaction cup. By using a moving structure, an eccentric transmission structure, and a support base to form a crank-slider mechanism, the entire device moves more smoothly during mixing. It meets the different stiffness requirements for mixing and cup gripping. Compared with existing solutions, it simplifies the structure, reduces the volume, lowers the cost, facilitates maintenance, and improves the consistency of mixing. 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 output rod is located on the side closer to the clamping mechanism, thereby overcoming the relatively large reaction force in the direction of cup gripping; and preventing the position of the clamping mechanism from changing when gripping the cup. This utility model has a simple structure and is highly practical. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 for Figure 1 A sectional view; Figure 4 for Figure 1 A schematic diagram showing the positional relationship between the clamping mechanism, the first rolling bearing, the second rolling bearing, and the support base; Figure 5 This is a schematic diagram of the structure of this utility model when A=B; Figure 6 This is a cross-sectional view of the present invention when A=B; in: 1. Clamping mechanism; 11. Gripper; 12. Elastic element; 13. Stop bar; 14. Clamping cavity; 2. Eccentric mixing mechanism; 21. Support base; 211. Threaded hole; 212. Mounting hole; 22. Eccentric transmission structure; 221. Eccentric wheel; 2211. Wheel body; 2212. Output rod; 222. First rolling bearing; 23. Moving structure; 231. Second rolling bearing; 232. Opening groove; 3. Drive mechanism; 31. Mounting bracket; 32. Rotary motor; 4. Baffle plate; 5. Photoelectric sensors; 100. Reaction cup. 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 1-6 As shown: A reaction cup clamping and mixing device includes a clamping mechanism 1 for clamping the reaction cup 100 and having a clamping cavity 14, an eccentric mixing mechanism 2 connected to the clamping mechanism 1, a driving mechanism 3 drivenly connected to the eccentric mixing mechanism 2, and a moving mechanism (not shown in the figure) connected to the driving mechanism 3 and used to control the driving mechanism 3, the eccentric mixing mechanism 2, and the clamping mechanism 1 to move in the vertical and horizontal directions. The eccentric mixing mechanism 2 includes a support base 21 for mounting the clamping mechanism 1, an eccentric transmission structure 22 with one end connected to the support base 21 and the other end connected to the drive mechanism 3 and eccentrically arranged inside, and a movable structure 23 disposed on the support base 21 and connected to the drive mechanism 3 to form a movable pair. In this utility model, the support base 21, the moving structure 23, and the eccentric transmission structure 22 constitute a crank-slider mechanism. In use, the clamping mechanism 1 clamps the reaction cup 100, and the driving mechanism 3 controls the eccentric transmission structure 22 to rotate, thereby driving the support base 21 to move. This causes the clamping mechanism 1, which is connected to the support base 21 and clamps the reaction cup 100, to move, thereby achieving the mixing action. The movable structure 23 is connected to the support base 21 by forming a movable pair, and the eccentric transmission structure 22 is connected to the support base 21 by forming a rotating pair, which makes the whole structure have good rigidity and run more smoothly during use.

[0020] When the drive mechanism 3 drives the eccentric transmission structure 22 to rotate, it will drive the support base 21 to move, thereby causing the reaction cup 100 held by the clamping mechanism 1 to move, so that the liquid in the reaction cup 100 can be mixed evenly.

[0021] In one possible implementation, in order to enable the movable structure 23 to form a sliding pair connection with the support base 21, the movable structure 23 includes a second rolling bearing 231 mounted on the support base 21 and an opening slot 232 disposed at the bottom of the drive mechanism 3 and disposed along the length direction of the support base 21; the length direction of the support base 21 described here is the X-axis direction, the second rolling bearing 231 is located in the opening slot 232 and cooperates with the opening slot 232 to form a sliding pair connection; the opening of the opening slot 232 is disposed along the length direction of the support base 21. The second rolling bearing 231 is located inside the opening groove 232 and is clearance-fitted with the opening groove 232. During mixing, the outer side of the second rolling bearing 231 will contact a set of inner surfaces of the opening groove 232 and move relative to each other. The second rolling bearing 231 is mounted on the support seat 21 by bolts.

[0022] In another possible implementation, the movable structure 23 includes a cylindrical pin mounted on the support base 21 and an oblong hole disposed at the bottom of the drive mechanism 3 and along the length of the support base 21; the long axis of the oblong hole is disposed along the length of the support base 21; the top of the cylindrical pin is located inside the oblong hole.

[0023] In some possible implementations, the eccentric transmission structure 22 includes an eccentric wheel 221 connected to the drive mechanism 3, and a first rolling bearing 222 mounted on the support 21 and connected to the eccentric wheel 221 in a rotating pair; such as Figure 4 As shown, the support base 21 is provided with a threaded hole 211 for the second rolling bearing 231 or a cylindrical pin, and a mounting hole 212 for installing the first rolling bearing 222; the center of the threaded hole 211, the center of the mounting hole 212, and the center of the clamping cavity 14 are on the same straight line. Furthermore, for ease of installation and replacement, the first rolling bearing 222 can be a flange bearing; the outer ring of the flange bearing is fixed to the support 21 by screws.

[0024] In some possible implementations, the eccentric wheel 221 includes a wheel body 2211 connected to the drive mechanism 3, and an output rod 2212 connected to the wheel body 2211 and eccentrically arranged inside; the output rod 2212 is fitted inside the inner ring of the first rolling bearing 222 with clearance fit; the drive mechanism 3 drives the wheel body 2211 to rotate around its axis, thereby causing the output rod 2212 to rotate around the axis of the wheel body 2211. The output rod 2212 is fitted inside the inner ring of the first rolling bearing 222, thereby driving the first rolling bearing 222 to move, and finally driving the support seat 21 to move. Furthermore, such as Figure 3 As shown, the bottom of the first rolling bearing 222 is connected to the output rod 2212 by bolts and washers; specifically, the outer diameter of the washer is larger than the outer diameter of the output rod 2212 and is fitted on the outside of the bolt, and one end of the bolt is screwed to the bottom of the output rod 2212.

[0025] In some possible implementations, such as Figure 1 , Figure 2 As shown, the drive mechanism 3 includes a mounting bracket 31 with an opening slot or waist-shaped hole at the bottom and a rotary motor 32 mounted on the mounting bracket 31; the output shaft of the rotary motor 32 passes through the mounting bracket 31 and is coaxially connected to the wheel body 2211; the output rod 2212 is eccentrically set with the wheel body 2211, which in turn makes the output rod 2212 and the output shaft of the rotary motor 32 eccentrically set. When the output shaft of the rotary motor 32 rotates around its axis, it drives the output rod 2212 to rotate around its axis. The output rod 2212 is fitted inside the inner ring of the first rolling bearing 222, and the two are coaxially fitted with a clearance. This effectively drives the support seat 21 to move, and cooperates with the moving structure 23 to control the movement of the clamping mechanism 1, so that the reaction cup 100 held by the clamping mechanism 1 can be mixed. The axial direction of the output shaft of the rotary motor 32 described here is the Z-axis direction. After mixing is complete, the output rod 2212 will be reset to its initial state under the control of the rotary motor 32, ready for the next mixing operation.

[0026] like Figure 1 , Figure 2As shown, in the initial state, the output rod 2212 in the eccentric wheel 221 is located at the leftmost position. The leftmost position is the position where the output rod 2212 is rotated to the side away from the moving structure 23 and the axis of the output rod 2212, the center of the clamping cavity 14, and the center of the first rolling bearing 222 are on the same vertical plane. This position is also the dead point position. During mixing, the rotary motor 32 rotates and transmits power to the clamping mechanism 1 connected to the support base 21 through the eccentric wheel 221 and the first rolling bearing 222; ultimately, it drives the liquid in the reaction cup 100 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.

[0027] like Figure 1 As shown, when gripping the cup, the rotary motor 32 drives the output rod 2212 to rotate to the leftmost position, that is, to the dead point position; at this time, the clamping mechanism 1 self-locks, which can overcome the relatively large reaction force in the clamping direction; in addition, the rigid connection between each structural component also ensures that high structural rigidity is maintained in other directions, avoiding changes in the position of the clamping mechanism 1 when gripping the cup.

[0028] In some possible implementations, a baffle 4 is provided on the wheel body 2211, and a photoelectric sensor 5 that works in conjunction with the baffle 4 is provided on the mounting bracket 31; when the light emitted by the photoelectric sensor 5 is blocked at a designated position on the baffle 4, the output rod 2212 is located on the side close to the clamping mechanism 1 and the axis of the output rod 2212, the center of the clamping cavity 14, and the center of the threaded hole 211 are on the same plane.

[0029] Specifically, the photoelectric sensor 5 is an existing product, and its internal structure will not be described in detail here; Specifically, the baffle 4 is installed on the outside of the sleeve and cooperates with the photoelectric sensor 5 installed on the mounting bracket 31; when the light signal emitted by the photoelectric sensor 5 is blocked by a certain designated position of the baffle 4, it is identified as the initial position, which corresponds to the initial state of the output rod 2212; this initial position is also the reset position after each mixing; through this setting, after each set of reaction cups 100 is mixed, the rotary motor 32 is reset by the cooperation of the two.

[0030] In some possible implementations, such as Figure 1 , Figure 2 As shown, the clamping mechanism 1 includes two sets of symmetrically arranged and rotatably mounted on the bottom of the support base 21, an elastic element 12 for connecting the two sets of clamps 11, and a stop bar 13 disposed on the outside of the two sets of clamps 11; the two sets of clamps 11 are close to each other to form a clamping cavity 14; the two sets of clamps 11 are respectively engaged with the support base 21 in a vertical rotational engagement, with the vertical direction being the Z-axis direction.

[0031] Two sets of grippers 11 are arranged vertically and rotate with the bottom of the support base 21 respectively. A clamping cavity 14 is formed between the two sets of grippers 11. Under the elastic force provided by the elastic element 12, the two sets of grippers 11 will apply clamping force to the reaction cup 100 respectively, thereby achieving effective clamping of the reaction cup 100. When the reaction cup 100 is dropped, the control lever 13 is impacted, causing the two sets of grippers 11 to rotate vertically away from each other, thereby enlarging the gripping cavity 14 and dropping the reaction cup 100. After the cup is dropped, the baffle is no longer impacted, and the two sets of grippers 11 return to their original positions under the elastic force of the elastic element 12. Specifically, the elastic element 12 is a tension spring, and its axial direction is set along the Y-axis.

[0032] In one possible implementation, such as Figure 4 As shown, the clamping mechanism is located on the side of the mounting hole 212 away from the threaded hole 211; In some possible implementations, such as Figure 5 As shown, the distance between the center of the threaded hole 211 and the center of the clamping cavity 14 is A, and the distance between the center of the threaded hole 211 and the center of the mounting hole 212 is B; A=B; the clamping cavity 14 is located at the bottom of the support base 21 and the center of the clamping cavity 14 is on the same straight line as the axis of the second rolling bearing 231. With this setting, the movement trajectory of the clamping mechanism 1 will be circular, so that the liquid in the reaction cup 100 can more easily form a vortex when mixed, thereby greatly improving the mixing efficiency.

[0033] In some possible implementations, a rubber layer is provided on the outer side of the second rolling bearing 231 or on the side where the cylindrical pin extends into the mounting bracket 31; The rubber layer effectively prevents hard contact between the second rolling bearing 231 or the cylindrical pin and the mounting bracket 31, thus avoiding damage after prolonged use.

[0034] 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 cup clamping and mixing device, characterized in that, It includes a clamping mechanism for holding the 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. The eccentric mixing mechanism includes a support base for mounting the clamping mechanism, an eccentric transmission structure with one end connected to the support base and the other end connected to the drive mechanism and eccentrically arranged, and a movable structure disposed on the support base and connected to the drive mechanism as a sliding pair.

2. The reaction cup clamping and mixing device according to claim 1, wherein, The movable structure includes a second rolling bearing mounted on a support base and an opening slot disposed at the bottom of the drive mechanism and along the length of the support base; the second rolling bearing is located in the opening slot and cooperates with the opening slot to form a sliding pair connection.

3. The reaction cup clamping and mixing device according to claim 1, wherein, The movable structure includes a cylindrical pin mounted on a support base and an oblong hole located at the bottom of the drive mechanism and along the length of the support base; the long axis of the oblong hole is located along the length of the support base; the top of the cylindrical pin is located inside the oblong hole.

4. The reaction cup clamping and mixing device according to claim 2, wherein, The eccentric transmission structure includes an eccentric wheel connected to the drive mechanism and a first rolling bearing mounted on a support base and connected to the eccentric wheel as a rotating pair; the support base is provided with a threaded hole for a second rolling bearing and a mounting hole for mounting the first rolling bearing; the center of the threaded hole, the center of the mounting hole, and the center of the clamping cavity are on the same straight line.

5. The reaction cup clamping and mixing device according to claim 3, wherein, The eccentric transmission structure includes an eccentric wheel connected to the drive mechanism and a first rolling bearing mounted on a support base and connected to the eccentric wheel as a rotating pair; the support base is provided with a threaded hole for a cylindrical pin and a mounting hole for mounting the first rolling bearing; the center of the threaded hole, the center of the mounting hole, and the center of the clamping cavity are on the same straight line.

6. A reaction cup clamping and mixing device according to claim 4 or 5, wherein, The eccentric wheel includes a wheel body connected to the drive mechanism and an output rod connected to the wheel body and eccentrically arranged inside; the output rod is fitted inside the inner ring of the first rolling bearing with clearance fit.

7. The reaction cup clamping and mixing device according to claim 6, wherein, The drive mechanism includes a mounting frame and a rotary motor mounted on the mounting frame; the output shaft of the rotary motor passes through the mounting frame and is coaxially connected to the wheel body.

8. The reaction cup clamping and mixing device according to claim 7, characterized in that, A baffle is provided on the wheel body, and a photoelectric sensor that works in conjunction with the baffle is provided on the mounting bracket; when the baffle blocks the light emitted by the photoelectric sensor, the output rod is located on the side close to the clamping mechanism and the axis of the output rod, the center of the clamping cavity, and the center of the threaded hole are on the same plane.

9. The reaction cup clamping and mixing device according to claim 4 or 5, characterized in that, The clamping mechanism includes two sets of symmetrically arranged and rotatably mounted on the bottom of the support base, an elastic element for connecting the two sets of clamps, and a stop bar disposed on the outside of the two sets of clamps; the two sets of clamps are close to each other to form a clamping cavity; the two sets of clamps are respectively engaged with the support base in a vertical rotational manner.

10. A reaction cup clamping and mixing device according to claim 4, characterized in that, The distance between the center of the threaded hole and the center of the clamping cavity is A, and the distance between the center of the threaded hole and the center of the mounting hole is B; A=B; the clamping cavity is located at the bottom of the support base and the center of the clamping cavity is on the same straight line as the axis of the second rolling bearing.

11. The reaction cup clamping and mixing device according to claim 2, characterized in that, A rubber layer is provided on the outer side of the second rolling bearing.

12. The reaction cup clamping and mixing device according to claim 3, characterized in that, A rubber layer is provided on the side of the cylindrical pin that extends into the drive mechanism.

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