Rotor positioning mechanism and centrifugal machine thereof

Abstract

The invention relates to the technical field of centrifugal machines, and particularly discloses a rotor positioning mechanism and a centrifugal machine comprising the same. A centrifugal cavity is formed in the centrifugal machine body, a rotor body and a positioning assembly in the rotor positioning mechanism are both installed in the centrifugal cavity, at least one grabbing window is formed in the centrifugal machine body, and the grabbing windows are opened or closed through a cover plate and a switch assembly for driving the cover plate. The power of the switch assembly and the power of the positioning assembly are integrated on the same linear driving mechanism, so that a power part for driving the cover plate to rotate and the clamping piece to move is optimized, the continuity of positioning of the hanging basket and opening of the grabbing window is guaranteed, and it is guaranteed that the situation that the hanging basket is not positioned and locked when the grabbing window is opened is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifuges, and particularly relates to a centrifuge rotor positioning mechanism. Background Art

[0002] Centrifugation has been widely used in various laboratories, especially biochemical laboratories; generally, various types of centrifuges need to be prepared in a laboratory. Centrifuges are mainly used for the separation and preparation of various biological samples. The biological sample suspension is placed in a centrifuge tube. Under high-speed rotation, due to the action of a huge centrifugal force, the suspended fine particles settle at a certain speed, so as to be separated from the solution;

[0003] With the popularization of laboratory automation, many experiments have been transferred from manual processing to automated equipment. However, in the process of using conventional laboratory centrifuges, it is necessary to manually open the centrifuge chamber, resulting in the fact that during the process of feeding or discharging materials by a robotic arm, it is impossible to completely eliminate manual intervention; therefore, a centrifuge adapted to the feeding and discharging of a robotic gripper is needed, and the centrifuge chamber is opened through a mechanical structure, so that manual intervention is not required, greatly accelerating the feeding and discharging of samples. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a centrifuge rotor positioning mechanism.

[0005] The rotor positioning mechanism of the present invention includes:

[0006] A rotor body, on which a hanging basket is installed, and a bracket for placing centrifuge tubes is installed on the hanging basket; the range in which the hanging basket rotates to the horizontal with the connection rotation point of the rotor body is set as area C, and area C forms an annular movable area D following the rotation of the rotor body;

[0007] A positioning component, which is used for locking and limiting the hanging basket on the rotor body, and is installed outside the annular movable area D;

[0008] The positioning component includes a linear driving mechanism, and a clamping member for clamping with the hanging basket is arranged on the linear driving mechanism, and a docking portion adapted to the clamping member is arranged on the hanging basket;

[0009] The clamping member is a vertical rod, and the docking portion on the hanging basket is a hole corresponding to the clamping member.

[0010] The centrifuge of the present invention includes a centrifuge body and a rotor positioning mechanism;

[0011] A centrifugal cavity is provided inside the centrifuge body, the rotor body and the positioning assembly in the rotor positioning mechanism are both installed inside the centrifugal cavity, at least one grabbing window is provided on the centrifuge body, and the grabbing window is opened or closed by a cover plate and a switch assembly driving the cover plate.

[0012] The grabbing window is opened on the top of the centrifuge body and is partially located on the side of the centrifuge body.

[0013] The switch assembly is used to drive the cover plate to rotate horizontally with the center of the top of the inner wall of the centrifuge body as the rotation point.

[0014] The switch assembly comprises a connecting member having the same center as the rotation path of the cover plate, and a driving member driving the connecting member to carry the cover plate to rotate synchronously.

[0015] In some embodiments, the connecting member is a driven shaft, and the driven shaft is rotatably mounted at the top center of the inner wall of the centrifuge body;

[0016] The driving member includes a driving motor and a synchronous belt for drivingly connecting the output shaft of the driving motor with the driven shaft.

[0017] In some embodiments, the connecting member is a first rack, the first rack is fixedly connected to the cover plate, the first rack is arc-shaped or annular, and the driving member is drivingly connected to the arc-shaped first rack;

[0018] The cover plate is rotatably connected to the top center of the centrifugal chamber via a bearing;

[0019] The driving member is a second rack, the second rack is mounted on the clamping member, and the second rack is transmission-connected to the first rack through a gear set;

[0020] The second rack is mounted on the linear drive mechanism or the clamping member and moves synchronously with the clamping member.

[0021] In some embodiments, the linear drive mechanism is vertically arranged below the hanging basket, and a spacing E is provided between the bottom of the hanging basket when it is stable and the bottom inner wall of the centrifuge body, and the spacing E is used to provide sufficient moving space for the second rack, thereby ensuring that the amplitude of driving the first rack to carry the cover plate to rotate is sufficient so that the cover plate no longer blocks the grabbing window.

[0022] In some embodiments, the linear drive mechanism is disposed at the bottom of the inner wall of the centrifugal chamber, and the clamping member is fixedly connected to the second rack in the switch assembly via a connecting rod;

[0023] The docking part in the rotor positioning mechanism is a docking block fixedly installed in the center of the bottom of the hanging basket, and the docking block is provided with a positioning hole for plugging the docking part, and the side wall of the positioning hole is also provided with a through hole for the connecting rod to pass through;

[0024] When the clamping part moves the first rack through the connecting rod, after positioning the hanging basket through the positioning hole, the first rack meshes with the gear set and the second rack moves.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. In the present invention, when the clamping part is in the docking part of the hanging basket through the linear drive mechanism, the hanging basket can be locked to prevent the hanging basket from swinging around the connection rotation point with the rotor body, ensuring the stable and reliable operation of the mechanical gripper when grasping or releasing the bracket or centrifuge tube equipped with centrifuge tubes.

[0027] 2. Under the activation of the switch component by the cover plate of the present invention, the grasping window can be automatically opened or closed, enabling the entire process of placing, centrifuging, and removing the bracket equipped with centrifuge tubes to be automated. By accelerating the loading and unloading speed of the bracket carrying the centrifuge tubes, the centrifugation efficiency of a large number of centrifuge tubes is increased; moreover, the rotor positioning mechanism can ensure the stability of the hanging basket when the mechanical arm grasps the bracket.

[0028] 3. The power of the switch component and the positioning component of the present invention is integrated on the same linear drive mechanism, thereby optimizing the power components for driving the rotation of the cover plate and the movement of the clamping part, ensuring the coherence of the hanging basket positioning and the opening of the grasping window, and ensuring that the situation where the hanging basket is not positioned and locked when the grasping window is opened does not occur.

[0029] 4. After positioning the hanging basket, the present invention can complete the step of opening the grasping window in one step, and ensure that the opening of the grasping window occurs after the hanging basket is stable, directly preventing the grasping window from opening when the hanging basket is unstable and preventing the door from being wrongly opened during centrifugation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present application, form a part of the present application, and the schematic embodiments and descriptions thereof are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0031] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0032] Figure 2 is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0033] Figure 3 is a structural diagram of the switch component of Embodiment 2 of the present invention;

[0034] Figure 4 is a semi-sectional structural diagram of Embodiment 3 of the present invention;

[0035] Figure 5 is the present inventionFigure 4 Schematic diagram of the enlarged structure at location A in

[0036] Figure 6 Schematic diagram of the half-section structure of the fourth embodiment of the present invention;

[0037] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at location B in

[0038] Figure 8 Schematic diagram of the top view half-section structure of the present invention;

[0039] Figure 9 Schematic diagram of the side view structure of the docking part of the present invention.

[0040] In the figure: 1, centrifuge body; 2, grasping window; 3, cover plate; 4, switch assembly; 41, connecting piece; 41a, driven shaft; 41b, first rack; 42, driving piece; 42a1, driving motor; 42a2, transmission belt; 42b, second rack; 43, gear set; 431, worm; 432, driving gear; 5, positioning assembly; 51, linear driving mechanism; 51, linear driving mechanism; 52, clamping piece; 53, docking part; 531, docking block; 532, positioning hole; 533, through hole; 54, connecting rod; 6, rotor body; 7, hanging basket; 8, bracket; 9, limiting piece. Detailed implementation manners

[0041] The following will disclose multiple embodiments of the present invention with diagrams. For the sake of clear illustration, many physical details will be described together in the following narrative. However, it should be understood that these physical details are not used to limit the present invention. That is to say, in some embodiments of the present invention, these physical details are unnecessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0042] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the order or sequence, nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] Embodiment 1:

[0044] Please refer to Figure 1 , the rotor positioning mechanism of the present invention includes a rotor body 6, a hanging basket 7 is installed on the rotor body 6, and a bracket 8 for placing and holding centrifuge tubes is installed on the hanging basket 7; the range where the hanging basket 7 rotates to the horizontal with the connection rotation point of the rotor body 6 is set as area C, and area C rotates with the rotor body 6 to form an annular movable area D;

[0045] A positioning assembly 5, which is used to lock and limit the hanging basket 7 on the rotor body 6, and is installed outside the annular movable area D;

[0046] The positioning assembly 5 includes a linear driving mechanism 51, and a clamping member 52 for clamping with the hanging basket 7 is provided on the linear driving mechanism 51, and a docking portion 53 adapted to the clamping member 52 is provided on the hanging basket 7;

[0047] The clamping member 52 is a vertical rod body, and the docking portion 53 on the hanging basket 7 is a hole corresponding to the clamping member 52;

[0048] In the embodiment, the hanging basket 7 is fixedly connected with a bracket 8 for placing centrifuge tubes; the manipulator directly grabs the centrifuge tubes to load and unload samples;

[0049] When this embodiment is in use:

[0050] When the clamping member 52 is in the docking portion 53 of the hanging basket 7 through the linear driving mechanism 51, the hanging basket 7 can be locked to prevent the hanging basket 7 from swinging with the connection rotation point of the rotor body 6, ensuring the stability and reliability of the hanging basket 7 when the mechanical gripper grabs and releases the bracket 8 equipped with centrifuge tubes;

[0051] In this embodiment, the driving mechanism can be an electric telescopic rod or a linear motor.

[0052] Further, the bracket 8 for placing centrifuge tubes fits on the hanging basket 7; the manipulator directly grabs the bracket 8 to directly batch remove the centrifuge tubes;

[0053] Specifically, a limiting member 9 is provided at the bottom of the hanging basket 7, and the inner wall of the limiting member 9 forms a fitting groove adapted to the bracket 8. The bracket 8 fits in the fitting groove and closely cooperates with the inner wall of the limiting member 9. A horizontal sensor and a vertical sensor for detecting whether the bracket 8 is fitted in place are provided on the bracket 8 and the hanging basket 7.

[0054] Embodiment Two:

[0055] Please refer to Figure 2 and Figure 3 , a centrifuge, including a centrifuge body 1 and the above-mentioned rotor positioning mechanism;

[0056] Inside the centrifuge body 1, there is a centrifugal chamber. The rotor body 6 and the positioning assembly 5 in the rotor positioning mechanism are both installed inside the centrifugal chamber. At least one grasping window 2 is opened on the centrifuge body 1, and the grasping window 2 is opened or closed by a cover plate 3 and a switch assembly 4 for driving the cover plate 3.

[0057] The grasping window 2 is opened at the top of the centrifuge body 1 and partially located on the side of the centrifuge body 1. This setting can effectively reduce the vertical movement distance of the manipulator carrying the bracket 8 above the grasping window 2.

[0058] The switch assembly 4 is used to drive the cover plate 3 to rotate horizontally with the center of the top of the inner wall of the centrifuge body 1 as the rotation point.

[0059] In this embodiment:

[0060] By the switch assembly 4, the cover plate 3 rotates horizontally with the center of the top of the inner wall of the centrifuge body 1 as the rotation point, so as to open or close the grasping window 2. Since the cover plate 3 rotates horizontally in the same plane, the moving range of the cover plate 3 coincides with the shape of the inner wall of the centrifugal chamber. That is, the space required for the movement of the cover plate 3 only needs to offset the inner wall of the centrifugal chamber by the same distance according to the thickness and shape of the cover plate 3, so as to provide a moving space for the cover plate 3. That is, the above-mentioned cover plate 3 and the switch assembly 4 for driving the movement of the cover plate 3 can save the space for the operation of the equipment to the greatest extent.

[0061] Specifically, the switch assembly 4 includes a connecting member 41 concentric with the rotation path of the cover plate 3, and a driving member 42 for driving the connecting member 41 to carry the cover plate 3 to rotate synchronously. The connecting member 41 is a driven shaft 41a, and the driven shaft 41a is rotatably installed at the center of the top of the inner wall of the centrifuge body 1. The driving member 42 includes a driving motor 42a1 and a synchronous belt 42a2 for transmitting the output shaft of the driving motor 42a1 to the driven shaft 41a. Transmission gears adapted to the synchronous belt 42a2 are provided on both the driving motor 42a1 and the driven shaft 41a.

[0062] Among them, after the equipment is started, the rotor body 6 drives the hanging basket 7 to rotate. When the rotor body 6 finishes working, through the corresponding induction mechanism positioning provided on the inner wall of the centrifugal chamber and the rotor body 6, when the rotor body 6 stops, the hanging basket 7 can just be located below the grasping window 2.

[0063] Working principle:

[0064] S1. Before the manipulator carries the bracket 8 with centrifuge tubes and places it on the hanging basket 7, first start the positioning assembly 5 to make the clamping member 52 thereof connect with the docking portion 53 on the hanging basket 7, so as to ensure the stability and reliability of the hanging basket 7 when the mechanical gripper places the bracket 8 with centrifuge tubes.

[0065] S2. Then, the drive motor 42a1 in the switch assembly 4 is used to drive the synchronous belt 42a2 to drive the drive shaft to carry the cover plate 3 to rotate horizontally to open the grasping window 2. After the manipulator places the bracket 8 with the centrifuge tube on the hanging basket 7, the drive mechanism is started again to carry the cover plate 3 to close the grasping window 2, and the limit on the hanging basket 7 is released by the positioning assembly 5;

[0066] S3. Subsequently, the motor driving the rotor body 6 is started for centrifugation. When the centrifugation is completed, the position of the hanging basket 7 is determined by the sensor to ensure that the hanging basket 7 is located below the grasping window 2;

[0067] S4. Then, the linear drive mechanism 51 in the positioning assembly 5 is started to connect its clamping part 52 with the docking part 53 on the hanging basket 7, ensuring the stability and reliability of the hanging basket 7 when the mechanical gripper grasps the bracket 8 with the centrifuge tube;

[0068] S5. The drive motor 42a1 in the switch assembly 4 is started, so that the cover plate 3 rotates around the driven shaft 41a to open the grasping window 2, and then the manipulator automatically grabs the bracket 8 with the centrifuge tube;

[0069] That is, during the use of this centrifuge, the cover plate 3 is started by the switch assembly 4 to automatically open or close the grasping window 2, and the bracket 8 with the centrifuge tube can be automatically carried out from loading, centrifugation to unloading. By accelerating the loading and unloading speed of the bracket 8 carrying the centrifuge tube, the centrifugation efficiency of a large number of centrifuge tubes is increased; and the rotor positioning mechanism can ensure the stability of the hanging basket 7 when the manipulator grabs the bracket 8.

[0070] Embodiment 3:

[0071] Please refer to Figure 4 and Figure 5 , as a further improvement of Embodiment 2:

[0072] The connecting member 41 is a first rack 41b, the first rack 41b is fixedly connected to the cover plate 3, the first rack 41b is arranged in an arc or a ring shape, and the driving member 42 is in transmission connection with the first rack 41b arranged in an arc shape;

[0073] The cover plate 3 is rotatably connected to the center of the top of the centrifugation chamber through a bearing.

[0074] The driving member 42 is a second rack 42b, the second rack 42b is installed on the clamping part 52, and the second rack 42b is in transmission connection with the first rack 41b through a gear set 43;

[0075] The second rack 42b is installed on the linear drive mechanism 51 or the clamping part 52 and moves synchronously with the clamping part 52.

[0076] The linear drive mechanism 51 is vertically arranged below the hanging basket 7. There is a distance E between the bottom of the hanging basket 7 when it is stable and the inner bottom wall of the centrifuge body 1. The distance E is used to provide enough moving space for the second rack 42b, so as to ensure that the amplitude of driving the first rack 41b to carry the cover plate 3 to rotate is sufficient to make the cover plate 3 no longer block the grasping window 2;

[0077] The gear set 43 includes a worm 431 that is in transmission connection with the second rack 42b. The worm 431 is vertically rotatably installed inside the centrifugal chamber, and a gear 432 that is in transmission connection with the first rack 41b is fixedly connected to the worm 431.

[0078] Working principle:

[0079] S1: Before the manipulator grabs the centrifuge tube or places the bracket 8 carrying the centrifuge tube on the hanging basket 7, the linear drive mechanism 51 is used to drive the clamping member 52 to carry the first rack 41b to rise, so that the worm 431 engaged with the first rack 41b drives the gear 432 to drive the second rack 42b to horizontally rotate with the center of the top of the inner wall of the centrifuge body 1 as the rotation point, that is, the cover plate 3 rotates horizontally as in the second embodiment, so as to realize the opening of the grasping window 2; during the process of opening the grasping window 2, the clamping member 52 will gradually approach the docking part 53. When the grasping window 2 is fully opened, the clamping member 52 is inserted into the docking part 53, that is, in this embodiment, the opening of the grasping window 2 and the locking of the hanging basket 7 are realized in one step;

[0080] S2. Then, after the manipulator places the bracket 8 equipped with the centrifuge tube on the hanging basket 7, the linear drive mechanism 51 is started again to reset, so as to close the grasping window 2 and release the restriction on the hanging basket 7;

[0081] S3. Subsequently, the equipment is started for centrifugation. When the centrifugation is completed, the position of the hanging basket 7 is determined through the sensor to ensure that the hanging basket 7 is located below the grasping window 2;

[0082] S4. Then, the linear drive mechanism 51 is used to drive the clamping member 52 to carry the first rack 41b to rise, so as to open the grasping window 2 and stably limit the hanging basket 7.

[0083] S5. The manipulator automatically grabs the bracket 8 equipped with the centrifuge tube.

[0084] In this embodiment, the power of the switch assembly 4 and the positioning assembly 5 in the second embodiment is integrated on the same linear drive mechanism 51, so as to optimize the power components for driving the cover plate 3 to rotate and the clamping member 52 to move, ensure the coherence of the positioning of the hanging basket 7 and the opening of the grasping window 2, and ensure that the situation where the hanging basket 7 is not positioned and locked when the grasping window 2 is opened will not occur.

[0085] Embodiment 4:

[0086] Please refer to Figures 6 - 9 , as a variation of Embodiment 3, in Embodiment 3, the rotation and opening of the cover plate 3 of the grasping window 2 precede the locking of the hanging basket 7. Therefore, it is possible that the cover plate 3 on the grasping window 2 opens when the hanging basket 7 is not stable, which poses a certain safety hazard. The following improvements are made to address this issue:

[0087] The linear drive mechanism 51 is arranged at the bottom of the inner wall of the centrifugal chamber, and the clamping member 52 is fixedly connected to the second rack 42b in the switch assembly 4 through the connecting rod 54;

[0088] The docking portion 53 in the rotor positioning mechanism is a docking block 531 fixedly installed at the center of the bottom of the hanging basket 7. A positioning hole 532 for the insertion of the docking portion 53 is provided on the docking block 531, and a through hole 533 for the passage of the connecting rod 54 is also provided on the side wall of the positioning hole 532;

[0089] When the clamping member 52 drives the first rack 41b to move through the connecting rod 54, after positioning the hanging basket 7 through the positioning hole 532, the first rack 41b is then engaged with the gear set 43 and the second rack 42b is moved, so that the positioning of the hanging basket 7 and the opening of the grasping window 2 can be completed in one step, and it is ensured that the opening of the grasping window 2 occurs after the hanging basket 7 is stable, directly preventing the grasping window 2 from opening when the hanging basket 7 is not stable and preventing the door from being opened erroneously during centrifugation.

[0090] The above are only the embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A rotor positioning mechanism, characterized in that, Comprising: A rotor body (6), a hanging basket (7) is mounted on the rotor body (6), and a bracket (8) for placing centrifuge tubes is mounted on the hanging basket (7); the range where the hanging basket (7) rotates to the horizontal with the connection rotation point of the rotor body (6) is set as area C, and the area C rotates with the rotor body (6) to form an annular movable area D; A positioning assembly (5), the positioning assembly (5) is used for locking and limiting the hanging basket (7) on the rotor body (6), and it is installed outside the annular movable area D; The positioning assembly (5) includes a linear driving mechanism (51), and a clamping member (52) for clamping with the hanging basket (7) is provided on the linear driving mechanism (51), and a docking portion (53) adapted to the clamping member (52) is provided on the hanging basket (7); The clamping member (52) is a vertical rod, and the docking portion (53) on the hanging basket (7) is a hole corresponding to the clamping member (52).

2. A centrifuge, characterized in that: Comprising a centrifuge body (1) and the rotor positioning mechanism according to claim 1; An inner part of the centrifuge body (1) is provided with a centrifugal chamber, the rotor body (6) and the positioning assembly (5) in the rotor positioning mechanism are both installed inside the centrifugal chamber, and at least one grasping window (2) is opened on the centrifuge body (1), and the grasping window (2) is opened or closed by a cover plate (3) and a switch assembly (4) for driving the cover plate (3); 3. The centrifuge according to claim 2, wherein: The grasping window (2) is opened at the top of the centrifuge body (1) and is partially located on the side of the centrifuge body (1).

4. The centrifuge according to claim 3, characterized in that: The switch assembly (4) is used for driving the cover plate (3) to rotate horizontally with the center of the inner wall top of the centrifuge body (1) as the rotation point.

5. The centrifuge according to claim 4, characterized in that: The switch assembly (4) includes a connecting member (41) concentric with the rotation path of the cover plate (3), and a driving member (42) for driving the connecting member (41) to carry the cover plate (3) to rotate synchronously.

6. The centrifuge according to claim 5, characterized in that: The connecting member (41) is a driven shaft (41a), and the driven shaft (41a) is rotatably installed at the center of the inner wall top of the centrifuge body (1); The driving member (42) includes a driving motor (42a1) and a synchronous belt (42a2) for transmitting the output shaft of the driving motor (42a1) to the driven shaft (41a).

7. A centrifuge according to claim 5, characterized in that: The connecting member (41) is a first rack (41b), the first rack (41b) is fixedly connected to the cover plate (3), the first rack (41b) is arranged in an arc or a ring shape, and the driving member (42) is in transmission connection with the arc-shaped first rack (41b); The cover plate (3) is rotatably connected to the center of the top of the centrifugal chamber through a bearing.

8. A centrifuge according to claim 7, characterized in that: The driving member (42) is a second rack (42b), the second rack (42b) is installed on the clamping member (52), and the second rack (42b) is in transmission connection with the first rack (41b) through a gear set (43); The second rack (42b) is installed on the linear driving mechanism (51) or the clamping member (52) and moves synchronously with the clamping member (52).

9. The centrifuge according to claim 8, characterized in that: The linear drive mechanism (51) is vertically arranged below the hanging basket (7). There is a spacing E between the bottom of the hanging basket (7) when it is stable and the inner bottom wall of the centrifuge body (1). The spacing E is used to provide sufficient moving space for the second rack (42b), so as to ensure that the amplitude of the first rack (41b) driving the cover plate (3) to rotate is sufficient to make the cover plate (3) no longer block the grasping window (2).

10. A centrifuge according to claim 8, characterized in that: The linear drive mechanism (51) is arranged at the inner bottom wall of the centrifugal chamber. The clamping member (52) is fixedly connected to the second rack (42b) in the switch assembly (4) through a connecting rod (54); The docking part (53) in the rotor positioning mechanism is a docking block (531) fixedly installed at the center of the bottom of the hanging basket (7). A positioning hole (532) for the docking of the docking part (53) is provided on the docking block (531). A through hole (533) for the connecting rod (54) to pass through is also provided on the side wall of the positioning hole (532); When the clamping member (52) drives the first rack (41b) to move through the connecting rod (54), after positioning the hanging basket (7) through the positioning hole (532), the first rack (41b) is engaged with the gear set (43) and the second rack (42b) is moved.

Images