Automatic positioning centrifugal machine

Abstract

The utility model relates to an automatic positioning centrifugal machine which comprises a machine box, a centrifugal chamber is arranged in the machine box, an upper cover capable of being opened and closed is installed in the machine box, and a mechanical arm material taking hole is formed in the upper cover. The upper end of the rotating shaft is positioned in the centrifugal chamber and the lower end is in driving connection with a centrifugal motor; the rotor is detachably mounted at the upper end of the rotating shaft and is provided with a plurality of centrifugal tube mounting positions; a main shaft of the positioning servo motor is in clutch connection with a main shaft of the centrifugal motor; and a positioning device configured to identify an initial position of the rotor. The sample tube positioning device is accurate in sample tube positioning and can be applied to an automatic sample detection system.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifuge technical field, specifically relates to a kind of automatic positioning centrifuge. BACKGROUND

[0002] Centrifuge is the centrifugal field generated by high-speed rotation to the suspension or emulsion containing different sedimentation coefficient is separated, concentrated and purified professional equipment quickly. Benchtop centrifuge is widely used in hospital laboratory, school, scientific research unit and enterprise laboratory, food testing room etc.

[0003] At present, fully-automatic centrifuge has been applied to sample flow line detection, and the rotor of the fully-automatic centrifuge has a plurality of tube positions. Each tube position is arranged to place a sample tube. To realize fully-automatic processing, the centrifuge needs to realize rotor positioning after completing centrifugation, and then a mechanical hand takes out the sample tube. Generally, the centrifuge has a relatively high rotating speed and a relatively large motor power. The high-speed and high-power motor has a good effect when driving load, but cannot realize accurate positioning. UTILITY MODEL CONTENT

[0004] The utility model aims at providing an automatic positioning centrifuge to solve the above problems.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] An automatic positioning centrifuge can include:

[0007] A case is provided with a centrifugal chamber and an openable and closable upper cover, and the upper cover is provided with a mechanical arm material taking hole.

[0008] A rotating shaft is provided at the upper end of the centrifugal chamber and drivenly connected with a centrifugal motor at the lower end.

[0009] A rotor is detachably mounted at the upper end of the rotating shaft and provided with a plurality of centrifugal tube mounting positions.

[0010] A positioning servo motor is provided with a main shaft that is clutchably connected with the main shaft of the centrifugal motor.

[0011] A positioning device is configured to identify the initial position of the rotor.

[0012] Further, the main shaft of the centrifugal motor extends out of the motor body at both ends, and the main shaft of the centrifugal motor and the main shaft of the positioning servo motor are coaxial and respectively provided with a first docking disc and a second docking disc, and the first docking disc and the second docking disc are provided with a clamping structure.

[0013] Further, the clamping structure comprises a positioning slot arranged on the first connecting disc and a positioning protrusion arranged on the second connecting disc.

[0014] Further, the positioning slot and the positioning protrusion are respectively provided with permanent magnets which can be attracted to each other.

[0015] Further, the first connecting disc is fixed on the lower end of the main shaft of the centrifugal motor, and the second connecting disc is movably sleeved on the upper end of the main shaft of the positioning servo motor.

[0016] Further, the positioning servo motor is fixedly installed on a lifting support, and the lifting support is drivingly connected with a lifting motor.

[0017] Further, the lifting support comprises two vertical columns and a horizontal plate, the vertical columns are fixedly installed on a base, the horizontal plate is installed on the two vertical columns through sliding bearings, the positioning servo motor is fixedly installed on the horizontal plate, and the lifting motor is fixed on the base and has a main shaft connected with the horizontal plate to drive the horizontal plate to lift.

[0018] Further, the base is provided with a travel switch support, and a travel switch is installed on the upper end of the travel switch support.

[0019] Further, the positioning device comprises a magnetic induction switch and a magnet, the magnet is arranged on the first connecting disc, and the magnetic induction switch is arranged on the horizontal plate.

[0020] Further, the material taking hole of the mechanical arm is provided with a sealing plate which can be automatically opened and closed.

[0021] The utility model discloses the above-mentioned technical scheme, and the beneficial effect is that through setting up the positioning servo motor, accurate positioning can be realized, so that the utility model can be applied to sample automatic detection system. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic view of an automatic positioning centrifuge according to an embodiment of the utility model;

[0023] Figure 2 It is Figure 1 a schematic view of an automatic positioning centrifuge, wherein the side plate is removed to show the internal structure;

[0024] Figure 3 It is Figure 1 a left view of the automatic positioning centrifuge;

[0025] Figure 4 It is a sectional view of the automatic positioning centrifuge along A-A in Fig. Figure 3 ;

[0026] Figure 5 is Figure 1 Fig. 1 is a perspective view of a servo motor and a lifting motor mounting structure of an automatic positioning centrifuge shown in Fig. 1. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present application will be described in detail with reference to the drawings, so that the purpose, characteristics and advantages of the present application can be more clearly understood. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the present application, but are only to illustrate the essential spirit of the technical scheme of the present application.

[0028] In the following description, for the purpose of illustrating various disclosed embodiments, specific details are set forth in order to provide a thorough understanding of various disclosed embodiments. However, it will be apparent to one skilled in the art that embodiments can be practiced without some or all of these specific details. In other instances, well known structures, materials, and techniques have not been shown or described in order to avoid unnecessarily obscuring the description of the embodiments.

[0029] Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

[0030] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0031] As used in this specification and the appended claims, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. It should be noted that the term "comprising" typically is used in its inclusive sense, unless the context clearly dictates otherwise.

[0032] In the following description, for the purpose of clearly showing the structure and working mode of the present application, a plurality of directional words will be used for description, but the words of "front", "back", "left", "right", "outer", "inner", "outward", "inward", "up", "down" and the like should be understood as convenient words, and should not be understood as limiting words.

[0033] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] like Figures 1 to 5 As shown, an automatic positioning centrifuge includes a casing 1, a rotating shaft 2, a rotor 3, a centrifugal motor 4, a servo positioning motor 5, and a positioning device. The casing 1 has a generally rectangular parallelepiped structure and contains a centrifuge chamber 11, where samples are centrifuged. A top cover 12 is installed above the centrifuge chamber 11 on the casing 1. The top cover 12 has a robotic arm picking hole 121, through which the robotic arm can remove the centrifuged sample from the centrifuge chamber 11. The upper end of the rotating shaft 2 is located inside the centrifuge chamber 11, and the lower end is driven and connected to the centrifugal motor 4. It should be understood that the rotating shaft 2 can be the main shaft 41 of the centrifugal motor 4, or it can be a separate rotating shaft connected to the main shaft of the centrifugal motor 4. The centrifugal motor 4 is a high-speed motor with a speed of up to 6000-8000 RPM. The rotor 3 is detachably mounted on the upper end of the rotating shaft 2 and has multiple centrifuge tube mounting positions 31. The rotor 3 can be an angle rotor or a horizontal rotor. The spindle 51 of the servo positioning motor 5 is disengaged from the spindle 41 of the centrifugal motor 4, and its specific structure is detailed below. During centrifugation, the spindle 51 of the servo positioning motor 5 is separated from the spindle 41 of the centrifugal motor 4, and the centrifugal motor 4 runs at high speed. After centrifugation, the spindle 51 of the servo positioning motor 5 engages with the spindle 41 of the centrifugal motor 4. The rotation of the servo positioning motor 5 drives the centrifuge's spindle and rotating shaft 3 to rotate, thereby driving the rotor 3 to rotate, positioning the sample tube in the robotic arm's pick-up hole 121, ensuring that the robotic arm can automatically remove the sample. The positioning device is used to identify the initial position of the rotor 3. When the positioning device determines that the rotor 3 is in the initial position, the servo positioning motor 5 resets and rotates by an angle, thus completing the purpose of positioning the sample tube in the robotic arm's pick-up hole 121. This invention, through the servo positioning motor and positioning device, can automatically position the sample tube in the robotic arm's pick-up hole, ensuring that the robotic arm accurately removes the sample.

[0036] The upper cover 12 can be a multi-layer board composite. The mechanical arm taking hole 121 is provided with a sealing plate 122 that can be automatically opened and closed, and a rubber seal is installed on the lower surface of the upper cover 12 to seal the centrifugal chamber 11 and ensure safety in use. The sealing plate 122 can adopt a telescopic opening and closing structure, or a flip opening and closing structure. The rear end of the upper cover 12 is installed on the top of the cabinet 1 through a hinge, so that the upper cover 12 can be conveniently opened. The upper cover 12 can be automatically or manually opened and closed. In addition, a locking mechanism is provided between the upper cover 12 and the cabinet body of the cabinet 1 to prevent the upper cover 12 from being accidentally opened. For example, the locking mechanism can be disclosed in the utility model patent CN218637622U applied by the applicant.

[0037] In addition, the cabinet 1 is also provided with a control panel 13 including a display screen and a plurality of operation buttons. The display screen can be a common LED display screen or a touch screen. The operation buttons can include parameter setting buttons, cover opening / closing buttons, unlocking / locking buttons, etc. Of course, some indicator lights can also be provided on the control panel to prompt the current working state of the automatic positioning centrifuge.

[0038] As shown in FIGS. Figure 2 , 4 and 5, the main shaft 41 of the centrifugal motor 4 extends out of the motor body at both ends, the upper end is connected with the rotating shaft 2 or the rotor 3, and the lower end is connected with the main shaft of the positioning servo motor 5. That is, the main shaft 41 of the centrifugal motor 4, the main shaft 51 of the positioning servo motor 5, and the rotating shaft 2 are coaxial. The main shaft 41 of the centrifugal motor 4 and the main shaft 51 of the positioning servo motor 5 are respectively provided with a first docking disc 6 and a second docking disc 7. The sizes of the first docking disc 6 and the second docking disc 7 can be the same or different. In the shown embodiment, the diameter of the first docking disc 6 is larger than that of the second docking disc 7. Preferably, the first docking disc 6 is fixed on the lower end of the main shaft 41 of the centrifugal motor 4, and the second docking disc 7 is movably sleeved on the upper end of the main shaft 51 of the positioning servo motor 5. That is, the second docking disc 7 can move up and down to realize connection and separation with the first docking disc 6. The first docking disc 6 and the second docking disc 7 are provided with a clamping structure matched with each other, so that the main shaft 41 of the centrifugal motor 4 and the main shaft 51 of the positioning servo motor 5 can be connected into one body, thereby the positioning servo motor 5 can drive the main shaft 41 of the centrifugal motor 4 to rotate, and further drive the rotating shaft 2 and the rotor 3 fixed on the rotating shaft 2 to rotate, so as to position the sample tube to the mechanical arm taking hole 121.

[0039] Specifically, the clamping structure can include a positioning slot 61 provided on the first interface disc 6 and a positioning protrusion 71 provided on the second interface disc 7. It should be understood that the first interface disc 6 can be provided with the positioning protrusion and the second interface disc 7 can be provided with the positioning slot. In the embodiment, the positioning slot 61 is a circular slot and the positioning protrusion 71 is a cylinder. It should be understood that the positioning slot 61 and the positioning protrusion 71 can also be rectangular or triangular or other shapes. The positioning slot 61 and the positioning protrusion 71 can be formed by machining. Preferably, the positioning slot 71 and the positioning protrusion 61 are respectively provided with a pair of mutually attractive permanent magnets 8, so that the second interface disc 7 can be moved towards the first interface disc 6 under the attraction of the permanent magnets 8. The permanent magnets 8 can be embedded in the opposite surfaces of the first interface disc 6 and the second interface disc 7 without exceeding the surfaces, so that the first interface disc 6 and the second interface disc 7 can be tightly engaged. The permanent magnets 8 can be neodymium magnets. The permanent magnets 8 can be cylindrical or square columnar.

[0040] The positioning servo motor 5 is fixedly installed on a lifting support, and the lifting support is drivingly connected with a lifting motor 9. The lifting motor 9 can drive the lifting support to move up and down, and in turn drive the positioning servo motor 5 to move towards or away from the centrifugal motor 4, so as to realize the clutching of the main shaft 51 of the positioning servo motor 5 and the main shaft 41 of the centrifugal motor 4. The lifting motor 9 is a linear motor. It should be understood that the lifting motor 9 can also be replaced by an electric push rod or a hydraulic push rod.

[0041] In the embodiment, the lifting support includes two columns 91 and a cross plate 92, wherein the columns 91 are fixedly installed on a base 93. The columns 91 are cylinders. The cross plate 92 is installed on the two columns 91 through sliding bearings, so that the cross plate 92 can move up and down along the columns 91. It should be understood that the sliding connection mode of the columns 91 and the cross plate 92 is not limited to the shown embodiment. The positioning servo motor 5 is fixedly installed on the cross plate 92, and the lifting motor 5 is fixed on the base 93 and its main shaft is connected with the cross plate 92 to drive the cross plate 92 to lift, and in turn drive the servo motor 5 to move up and down.

[0042] In the embodiment, the positioning device includes a magnetic induction switch 94 and a magnet 95, the magnet 95 is arranged on the first interface disc 7, and the magnetic induction switch 94 is arranged on the cross plate 92, for sensing whether the magnet 95 is in a predetermined position, i.e. determining whether the rotor 3 is in the initial position. The magnet 95 is away from the permanent magnets 8 by a certain distance to avoid the magnetic field of the permanent magnets 8 affecting the action of the magnetic induction switch 94, resulting in inaccurate positioning. The magnetic induction switch 94 is fixedly installed on a bracket, which is fixed (for example by screws or welding) on the cross plate 92.

[0043] In addition, the base 93 is provided with a travel switch bracket 96, and a travel switch 97 is installed at the upper end of the travel switch bracket 96, and the travel switch 97 is used to interlock the stop of the lifting motor 9. Specifically, when the travel switch 97 is triggered, the travel switch 97 can include an up-and-down travel switch, or only an up travel switch or a down travel switch. The travel switch 97 is commercially available.

[0044] The working process of the utility model is that the sample tube to be centrifuged is installed on the rotor 3 in the centrifugal chamber, the upper cover is closed, the centrifugal motor 4 is started, and the centrifugal operation is performed, when the centrifugal operation is completed, the centrifugal motor 4 is stopped, the lifting motor 9 is started, the positioning servo motor 5 is driven to rise, when the positioning servo motor 5 rises to the predetermined height, if the positioning device does not detect that the rotor is in the initial position, the positioning servo motor 5 rotates until the positioning device detects that the rotor is in the initial position, at this time, the positioning protrusions 71 of the second docking disc 7 are inserted into the positioning grooves 61 of the first docking disc 6 through the attraction of the permanent magnet 8, the main shaft 51 of the positioning servo motor 5 is engaged with the main shaft 41 of the centrifugal motor 4, then the positioning servo motor 5 is reset and rotated by a certain angle according to the predetermined program, so that the sample tube on the rotor is in the mechanical arm material taking hole 121, the mechanical arm is inserted into the mechanical arm material taking hole 121 to take out the sample tube. When the sample tubes on the rotor are all taken away, the lifting motor 9 is started to drive the lifting bracket to descend, so that the second docking disc 7 is disengaged from the first docking disc 6, when the travel switch 97 is triggered, the lifting motor 9 is stopped.

[0045] The preferred embodiments of the utility model have been described in detail above, but it should be understood that after reading the above teaching content of the utility model, those skilled in the art can make various changes or modifications to the utility model. These equivalent forms also fall within the scope defined by the claims attached to the present application.

Claims

1. An automated positioning centrifuge, characterized by, The utility model relates to a centrifugal machine with automatic positioning function, comprising: a cabinet, which is provided with a centrifugal chamber and is provided with an openable upper cover, and the upper cover is provided with a mechanical arm material taking hole; a rotating shaft, the upper end of which is located in the centrifugal chamber and the lower end of which is drivingly connected with a centrifugal motor; a rotor, which is detachably installed at the upper end of the rotating shaft and is provided with a plurality of centrifugal tube installation positions; a positioning servo motor, the main shaft of which is drivingly connected with the main shaft of the centrifugal motor in a clutchable manner; and a positioning device, which is configured to identify the initial position of the rotor. The main shaft of the centrifugal motor extends out of the motor body at both ends, the main shaft of the centrifugal motor and the main shaft of the positioning servo motor are coaxial and are respectively provided with a first docking disc and a second docking disc, and the first docking disc and the second docking disc are provided with clamping structures.

2. The automated positioning centrifuge of claim 1, wherein, The clamping structures comprise a positioning groove provided on the first docking disc and a positioning protrusion provided on the second docking disc.

3. The automated positioning centrifuge of claim 2, wherein, Permanent magnets that can be attracted to each other are arranged beside the positioning groove and the positioning protrusion.

4. The automated positioning centrifuge of claim 3, wherein, The first docking disc is fixed on the lower end of the main shaft of the centrifugal motor, and the second docking disc is movably sleeved on the upper end of the main shaft of the positioning servo motor.

5. The automated positioning centrifuge of claim 2, wherein, The positioning servo motor is fixedly installed on a lifting support, and the lifting support is drivingly connected with a lifting motor.

6. The automated positioning centrifuge of claim 2, wherein, The lifting support comprises two vertical columns and a horizontal plate, the vertical columns are fixedly installed on a base, the horizontal plate is installed on the two vertical columns through sliding bearings, the positioning servo motor is fixedly installed on the horizontal plate, and the lifting motor is fixed on the base and its main shaft is connected with the horizontal plate to drive the horizontal plate to lift up and down.

7. The automated positioning centrifuge of claim 6, wherein, The positioning device comprises a magnetic induction switch and a magnet, the magnet is arranged on the first docking disc, and the magnetic induction switch is arranged on the horizontal plate.

8. The automated positioning centrifuge of claim 7, wherein, A travel switch support is arranged on the base, and a travel switch is installed on the upper end of the travel switch support.

9. The automated positioning centrifuge of claim 7, wherein, The mechanical arm material taking hole is provided with a sealing plate that can be automatically opened and closed.

10. The automated positioning centrifuge of claim 1, wherein, The utility model relates to a centrifugal machine with automatic positioning function, comprising: a cabinet, which is provided with a centrifugal chamber and is provided with an openable upper cover, and the upper cover is provided with a mechanical arm material taking hole; a rotating shaft, the upper end of which is located in the centrifugal chamber and the lower end of which is drivingly connected with a centrifugal motor; a rotor, which is detachably installed at the upper end of the rotating shaft and is provided with a plurality of centrifugal tube installation positions; a positioning servo motor, the main shaft of which is drivingly connected with the main shaft of the centrifugal motor in a clutchable manner; and a positioning device, which is configured to identify the initial position of the rotor. The main shaft of the centrifugal motor extends out of the motor body at both ends, the main shaft of the centrifugal motor and the main shaft of the positioning servo motor are coaxial and are respectively provided with a first docking disc and a second docking disc, and the first docking disc and the second docking disc are provided with clamping structures. The clamping structures comprise a positioning groove provided on the first docking disc and a positioning protrusion provided on the second docking disc. Permanent magnets that can be attracted to each other are arranged beside the positioning groove and the positioning protrusion. The first docking disc is fixed on the lower end of the main shaft of the centrifugal motor, and the second docking disc is movably sleeved on the upper end of the main shaft of the positioning servo motor. The positioning servo motor is fixedly installed on a lifting support, and the lifting support is drivingly connected with a lifting motor. The lifting support comprises two vertical columns and a horizontal plate, the vertical columns are fixedly installed on a base, the horizontal plate is installed on the two vertical columns through sliding bearings, the positioning servo motor is fixedly installed on the horizontal plate, and the lifting motor is fixed on the base and its main shaft is connected with the horizontal plate to drive the horizontal plate to lift up and down. The positioning device comprises a magnetic induction switch and a magnet, the magnet is arranged on the first docking disc, and the magnetic induction switch is arranged on the horizontal plate. A travel switch support is arranged on the base, and a travel switch is installed on the upper end of the travel switch support. The mechanical arm material taking hole is provided with a sealing plate that can be automatically opened and closed.

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