Centrifugal machine rotor structure

Abstract

The utility model relates to the technical field of centrifugal machines, and discloses a centrifugal machine rotor structure which comprises a rotor body, a plurality of cylindrical cavities evenly distributed in the circumferential direction are formed in the rotor body, a lining is arranged in each cylindrical cavity, and an annular gap is formed between the outer wall of each lining and the corresponding cylindrical cavity. Convex ribs which are spirally distributed are arranged on the outer wall of the lining, and the tops of the convex ribs abut against the inner wall of the cylindrical cavity, so that the lining is detachably connected with the cylindrical cavity; an annular groove is formed in the upper end of the cylindrical cavity, and an annular boss connected with the annular groove in a clamped mode is arranged on the outer wall of the upper end of the lining. The reagent tube centrifugal machine can be suitable for centrifugal use of reagent tubes of different models and has the advantage of being high in universality.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, in particular to a centrifuge rotor structure. Background Art

[0002] A centrifuge is a device that uses centrifugal force to separate liquids from solids (particulate matter). It is mainly used to separate solids from liquids in suspensions and is widely used in the biomedical field. The core component of a centrifuge is the centrifuge rotor, which is equipped with several cylindrical cavities distributed along the circumference for installing reagent tubes. When in use, the reagent tubes to be separated are inserted into the cylindrical cavities for centrifugal separation. However, since the outer diameters of the reagent tubes come in a variety of sizes, and the diameter of the cylindrical cavity on the centrifuge rotor is fixed, it can only be used for one type of reagent tube, and has poor versatility. Utility Model Content

[0003] In order to solve the above problems existing in the prior art, the utility model provides a centrifuge rotor structure which can be applied to the centrifugation of reagent tubes of different models and has strong versatility.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A centrifuge rotor structure, comprising a rotor body, wherein a plurality of cylindrical cavities evenly distributed along the circumferential direction are arranged inside the rotor body, a bushing is arranged inside each cylindrical cavity, an annular gap is formed between the outer wall of the bushing and the cylindrical cavity, and a convex rib distributed in a spiral shape is arranged on the outer wall of the bushing, and the top of the convex rib abuts against the inner wall of the cylindrical cavity, so that the bushing and the cylindrical cavity form a detachable connection;

[0006] An annular groove is arranged at the upper end of the cylindrical cavity, and an annular boss which is clamped with the annular groove is arranged at the outer wall of the upper end of the bushing.

[0007] Preferably, a conical chamfer is provided between the upper end surface and the inner wall of the bushing.

[0008] Preferably, a plurality of lugs distributed along the circumferential direction are provided on the outer wall of the upper end of the bushing.

[0009] Preferably, the lower end of the bushing is provided with a plurality of elastic clips evenly distributed along the circumferential direction, and the lower end of each elastic clip is inclined inwardly to form a cone.

[0010] Preferably, a drainage through hole communicating with the bottom surface of the rotor body is provided at the bottom of the cylindrical cavity.

[0011] Preferably, a connecting shaft is provided at the center of the rotor body, the upper end of the connecting shaft forms a tapered connecting portion, the lower end of the connecting shaft is provided with a sleeve for connecting to the motor, and the central lower end of the rotor body is provided with a tapered hole adapted to the tapered connecting portion;

[0012] A central hole coaxially connected to the tapered hole is provided at the central upper end of the rotor body, a threaded hole is provided at the center of the upper end of the tapered connecting portion, and a bolt connected to the threaded hole is provided in the central hole.

[0013] Preferably, a connecting sleeve extending downward is provided at the center of the bottom surface of the rotor body, and a plurality of positioning grooves distributed circumferentially are provided on the lower end surface of the connecting sleeve. A connecting disk is provided on the connecting shaft, and a plurality of positioning bosses matching the positioning grooves are provided on the upper end surface of the connecting disk. When the conical connecting portion is connected with the tapered hole, the positioning bosses are inserted into the positioning grooves.

[0014] Therefore, the utility model can be suitable for centrifugal use of reagent tubes of different models, and has the beneficial effect of strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 for Figure 1 sectional view of .

[0017] Figure 3 for Figure 1 Exploded diagram.

[0018] Figure 4 for Figure 1 Another perspective of the picture.

[0019] Figure 5 A cross-sectional view of the rotor body.

[0020] Figure 6 Schematic diagram of the structure of the bushing.

[0021] Figure 7 Another perspective view of the bushing. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the scope of protection of the present invention.

[0023] It should be understood that, in this document, the expressions "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance, nor should they be understood as implicitly indicating the number of technical features indicated. Features defined as "first" or "second" may explicitly or implicitly indicate that at least one of the features is included.

[0024] like Figure 1-Figure 7 A centrifuge rotor structure shown includes a rotor body 10, wherein a plurality of cylindrical cavities 100 uniformly distributed along the circumferential direction are arranged inside the rotor body 10, a drainage through hole 101 connected to the bottom surface of the rotor body is arranged at the bottom of the cylindrical cavity, a bushing 20 is arranged in each cylindrical cavity 100, an annular gap is formed between the outer wall of the bushing 20 and the cylindrical cavity, the outer wall of the bushing 20 is provided with a spirally distributed rib 200, the top of the rib 200 abuts against the inner wall of the cylindrical cavity, so that the bushing and the cylindrical cavity form a detachable connection; an annular groove 102 is arranged at the upper end of the cylindrical cavity 100, and an annular boss 201 engaged with the annular groove is arranged at the outer wall of the upper end of the bushing 20.

[0025] Select the corresponding bushing according to the model of the reagent tube. The bushing in this embodiment is a plastic bushing. The bushing is inserted into the cylindrical cavity. The spiral ribs on the outer wall of the bushing are tensioned with the inner wall of the cylindrical cavity (the cylindrical surface formed on the top of the ribs is interference fit with the inner wall of the cylindrical cavity), so that the bushing and the cylindrical cavity are stably matched to prevent the bushing from shaking in the cylindrical cavity and it is also convenient to remove the bushing from the cylindrical cavity; at the same time, the annular boss on the bushing is stuck in the annular groove, so as to prevent the entire bushing from entering the cylindrical cavity, making the installation and disassembly of the bushing more convenient.

[0026] A conical chamfer 202 is provided between the upper end surface and the inner wall of the bushing 20, and the conical chamfer facilitates the insertion of the reagent tube into the bushing; a plurality of circumferentially distributed lugs 203 are provided on the outer wall of the upper end of the bushing 20, and the lugs facilitate grasping the bushing and removing the bushing from the cylindrical hole.

[0027] The lower end of the bushing 20 is provided with a plurality of elastic clips 204 evenly distributed along the circumference, and the lower end of each elastic clip is inclined inward to form a cone. The reagent tube is usually matched with the bushing gap. After the reagent tube is inserted into the bushing, the lower end of the reagent tube will be stuck between the elastic clips, thereby preventing the reagent tube from shaking in the bushing due to the gap.

[0028] A connecting shaft 30 is provided at the center of the rotor body 10, and a conical connecting portion 300 is formed at the upper end of the connecting shaft 30, and a sleeve 301 for connecting to the motor is provided at the lower end of the connecting shaft 30, and a conical hole 103 adapted to the conical connecting portion is provided at the central lower end of the rotor body 10; a center hole 104 coaxially connected to the conical hole is provided at the central upper end of the rotor body 10, and a threaded hole 302 is provided at the center of the upper end of the conical connecting portion 300, and a bolt 40 connected to the threaded hole is provided in the center hole.

[0029] A connecting sleeve 11 extending downward is provided at the center of the bottom surface of the rotor body 10, and a plurality of positioning grooves 110 distributed circumferentially are provided on the lower end surface of the connecting sleeve 11. A connecting disk 31 is provided on the connecting shaft 30, and a plurality of positioning bosses 310 matched with the positioning grooves are provided on the upper end surface of the connecting disk. When the conical connecting portion is connected with the conical hole, the positioning bosses are inserted into the positioning grooves.

[0030] The connection between the connecting shaft and the rotor body is very convenient and stable. After the conical connecting arm on the connecting shaft is inserted into the tapered hole and locked by bolts, automatic centering is achieved. At the same time, the two conical surfaces are pressed and fitted together to have a large static friction force, which can stably transmit the torque; after the positioning boss is inserted into the positioning groove, the torque of the connecting shaft can be stably transmitted to prevent relative rotation between the rotor body and the connecting shaft due to looseness; the overall stability is very good.

[0031] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by up, down, left, right, inner end, outer end, one end, the other end, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of more clearly describing the technical solution of the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific orientation, and cannot be understood as a limitation of the present invention.

[0032] Although specific embodiments of the present invention are described in detail herein, they are provided for the purpose of explanation only and should not be considered to limit the scope of the present invention. Various substitutions, changes and modifications may be conceived without departing from the spirit and scope of the present invention.

Claims

1. A centrifuge rotor structure, comprising a rotor body, wherein the rotor body is provided with a plurality of cylindrical cavities evenly distributed along the circumferential direction, wherein: A bushing is provided in each cylindrical cavity, an annular gap is formed between the outer wall of the bushing and the cylindrical cavity, and the outer wall of the bushing is provided with spirally distributed ribs, the top of the ribs abuts against the inner wall of the cylindrical cavity, so that the bushing and the cylindrical cavity form a detachable connection; An annular groove is arranged at the upper end of the cylindrical cavity, and an annular boss which is clamped with the annular groove is arranged at the outer wall of the upper end of the bushing.

2. A centrifuge rotor structure according to claim 1, characterized in that: A conical chamfer is provided between the upper end surface and the inner wall of the bushing.

3. A centrifuge rotor structure according to claim 1, characterized in that: A plurality of lugs distributed along the circumferential direction are arranged on the outer wall of the upper end of the bushing.

4. A centrifuge rotor structure according to claim 1, 2 or 3, characterized in that: The lower end of the bushing is provided with a plurality of elastic clips evenly distributed along the circumferential direction, and the lower end of each elastic clip is inclined inwardly to form a cone surface.

5. A centrifuge rotor structure according to claim 1, characterized in that: The bottom of the cylindrical cavity is provided with a drainage through hole which is communicated with the bottom surface of the rotor body.

6. A centrifuge rotor structure according to claim 1, characterized in that: A connecting shaft is provided at the center of the rotor body, a conical connecting portion is formed at the upper end of the connecting shaft, a shaft sleeve for connecting to the motor is provided at the lower end of the connecting shaft, and a conical hole matching the conical connecting portion is provided at the central lower end of the rotor body; A central hole coaxially connected to the tapered hole is provided at the central upper end of the rotor body, a threaded hole is provided at the center of the upper end of the tapered connecting portion, and a bolt connected to the threaded hole is provided in the central hole.

7. A centrifuge rotor structure according to claim 6, characterized in that: A connecting sleeve extending downward is provided at the center of the bottom surface of the rotor body, and a plurality of positioning grooves distributed circumferentially are provided on the lower end surface of the connecting sleeve. A connecting disk is provided on the connecting shaft, and a plurality of positioning bosses matching the positioning grooves are provided on the upper end surface of the connecting disk. When the conical connecting portion is connected with the conical hole, the positioning bosses are inserted into the positioning grooves.

Images