Centrifugal device and centrifuge

Abstract

The application relates to the technical field of medical devices, and aims to solve the problem of how to reduce vibration noise when a centrifugal cylinder rotates, and provides a centrifugal device and a centrifugal machine. The centrifugal device comprises a centrifugal cylinder, a cylinder shell, a first magnetic connecting piece and a second magnetic connecting piece. The centrifugal cylinder comprises a first rotating shaft, a second rotating shaft and a cylinder body. The cylinder shell comprises a first bearing, a second bearing and a shell body, and the cylinder body is arranged in the shell body. The first magnetic connecting piece comprises a tray and a first magnetic suction piece, the tray is fixedly connected with the second rotating shaft, and the first magnetic suction piece surrounds the second rotating shaft and is fixedly connected with the tray. The second magnetic connecting piece comprises a rotating disc and a second magnetic suction piece, the second magnetic suction piece is fixedly connected with the rotating disc, the second magnetic suction piece corresponds to the first magnetic suction piece, the second magnetic suction piece can be forced to rotate and attract the first magnetic suction piece to drive the tray and the centrifugal cylinder to rotate, so that the stability of the tray in driving the centrifugal cylinder to rotate is improved, and the coaxiality precision of the rotating shaft of the centrifugal cylinder and the rotating shaft of the motor is high, so as to reduce vibration noise when the centrifugal cylinder rotates.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to centrifugation devices and centrifuges. Background Technology

[0002] Platelet-rich plasma (PRP) is plasma rich in platelets, obtained by centrifuging whole blood from animals or humans. PRP centrifuges are used for centrifuging blood and are widely used in the medical field. The centrifuge drum of the centrifuge is fixedly connected to the motor shaft; the rotation of the motor shaft drives the centrifuge drum to rotate, thus performing the centrifugation operation.

[0003] In existing technologies, the rotation of a centrifuge generates centrifugal force, and the coaxiality between the centrifuge's rotating shaft and the motor's rotating shaft is often not very precise, resulting in significant vibration and noise during centrifuge rotation. How to solve these technical problems is a question that those skilled in the art need to consider. Utility Model Content

[0004] This application provides a centrifugation device and a centrifuge to solve the problem of how to reduce vibration noise when the centrifuge tube is rotating.

[0005] In a first aspect, embodiments of this application provide a centrifuge device including a centrifuge cylinder, a cylinder shell, a first magnetic connector, and a second magnetic connector. The centrifuge cylinder includes a first rotating shaft, a second rotating shaft, and a cylinder body. The first rotating shaft is fixedly connected to the top of the cylinder body, and the second rotating shaft is fixedly connected to the bottom of the cylinder body. The cylinder shell includes a first bearing, a second bearing, and a housing. The cylinder body is disposed within the housing. The first bearing is disposed at the top of the housing. The first rotating shaft is rotatably connected to the housing via the first bearing. The second bearing is disposed at the bottom of the housing, and the second rotating shaft is rotatably connected to the housing via the second bearing. The first magnetic connector includes a tray and a first magnetic attractor. The tray is fixedly connected to the second rotating shaft, and the first magnetic attractor surrounds the second rotating shaft and is fixedly connected to the tray. The second magnetic connector includes a rotating disk and a second magnetic attractor. The second magnetic attractor is fixedly connected to the rotating disk and corresponds to the first magnetic attractor. The second magnetic attractor is capable of rotating under force and attracting the first magnetic attractor to drive the tray and the centrifuge cylinder to rotate.

[0006] Compared to existing technologies, the centrifuge device provided in this embodiment improves the positional accuracy of the centrifuge cylinder's rotating shaft through the first and second bearings. The centrifuge device uses a second magnetic attractor corresponding to the first magnetic attractor, which attracts the first magnetic attractor to drive the tray to rotate, thereby improving the stability of the tray driving the centrifuge cylinder to rotate. Therefore, the coaxiality accuracy of the centrifuge cylinder's rotating shaft and the motor's rotating shaft is relatively high, which achieves the effect of reducing vibration noise when the centrifuge cylinder rotates.

[0007] In one possible implementation, the tray has a first groove on its periphery, the first magnetic member is fixed to the first groove, the rotating disk has a second groove on its periphery, the second magnetic member is fixed to the second groove, and the first groove and the second groove correspond to each other along the axial direction of the rotating disk.

[0008] In one possible implementation, the tray and the rotating disk are spaced apart, with the distance between the tray and the rotating disk not exceeding 15 mm.

[0009] In one possible implementation, a motor is also included, which is connected to the rotating disk and is used to drive the rotating disk to rotate.

[0010] In one possible implementation, the tray includes a disc portion and a connecting hole portion, the connecting hole portion protruding from the surface of the disc portion along the axial direction of the rotating disk, the second rotating shaft extending into the connecting hole portion and fixedly connected to the connecting hole portion, the inner ring of the second bearing being fixedly connected to the circumferential surface of the connecting hole portion, and the outer ring of the second bearing being fixedly connected to the housing.

[0011] In one possible implementation, the bottom of the housing is provided with a second annular groove, the second bearing is disposed in the second annular groove, and the outer ring of the second bearing is fixedly connected to the side wall of the second annular groove.

[0012] In one possible implementation, the top of the housing is provided with a first annular groove, which corresponds to the second annular groove along the axial direction of the rotating disk. The first bearing is disposed in the first annular groove, the outer ring of the first bearing is fixedly connected to the side wall of the first annular groove, and the inner ring of the first bearing is fixedly connected to the first rotating shaft.

[0013] In one possible implementation, the surface of the rotating disk is recessed to form a receiving cavity, the tray is rotatably disposed in the receiving cavity, and the circumferential surface of the tray engages with the inner wall of the receiving cavity.

[0014] In one possible implementation, the first magnetic chuck is located on the periphery of the tray, and the second magnetic chuck is located on the inner wall of the receiving cavity.

[0015] In one possible implementation, a fixing part is provided on the side of the housing, which fixes the position of the housing.

[0016] Secondly, embodiments of this application provide a centrifuge, including the centrifugation apparatus according to the first aspect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a centrifuge according to an embodiment of this application;

[0019] Figure 2 This is an exploded view of a tray and a rotating disk according to an embodiment of this application;

[0020] Figure 3 This is an exploded view of a centrifuge apparatus according to another embodiment of this application;

[0021] Figure 4 for Figure 1 A perspective view of some parts of the shell of a centrifuge device.

[0022] Explanation of key component symbols:

[0023] 1. Centrifuge device; 11. Centrifuge cylinder; 111. First rotating shaft; 112. Second rotating shaft; 113. Cylinder body; 114. Upper cylinder section; 115. Lower cylinder section; 116. Piston; 12. Cylinder shell; 121. First bearing; 122. Second bearing; 123. Shell; 124. Fixing part; 125. First annular groove; 126. Second annular groove; 127. Shell section; 13. First magnetic connector; 131. Tray; 132. Disc section; 133. Connecting hole section; 134. First groove; 135. First magnetic attractor; 14. Second magnetic connector; 141. Rotating disk; 142. Second groove; 143. Second magnetic attractor. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0025] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] Example

[0027] Please see Figures 1 to 4As shown, this embodiment provides a centrifuge device 1, including a centrifuge cylinder 11, a shell 12, a first magnetic connector 13, a second magnetic connector 14, and a motor. The centrifuge cylinder 11 includes a first rotating shaft 111, a second rotating shaft 112, and a cylinder body 113. The first rotating shaft 111 is fixedly connected to the top of the cylinder body 113, and the second rotating shaft 112 is fixedly connected to the bottom of the cylinder body 113. The shell 12 includes a first bearing 121, a second bearing 122, and a housing 123. The cylinder body 113 is disposed within the housing 123. The first bearing 121 is disposed at the top of the housing 123. The first rotating shaft 111 is rotatably connected to the housing 123 via the first bearing 121. The second bearing 122 is disposed at the bottom of the housing 123, and the second rotating shaft 112 is rotatably connected to the housing 123 via the second bearing 122. The first magnetic connector 13 includes a tray 131 and a first magnetic attractor 135. The tray 131 is fixedly connected to the second rotating shaft 112, and the first magnetic attractor 135 surrounds the second rotating shaft 112 and is fixedly connected to the tray 131. The second magnetic connector 14 includes a rotating disk 141 and a second magnetic attractor 143. A motor is driven to rotate the rotating disk 141. The motor is used to drive the rotating disk 141 to rotate. The second magnetic attractor 143 is fixedly connected to the rotating disk 141 and corresponds to the first magnetic attractor 135. The second magnetic attractor 143 can rotate under force and attract the first magnetic attractor 135 to drive the tray 131 and the centrifuge cylinder 11 to rotate.

[0028] The centrifuge device 1 provided in this embodiment improves the positional accuracy of the rotating shaft of the centrifuge cylinder 11 through the first bearing 121 and the second bearing 122. The centrifuge device 1 is connected to the first magnetic attractor 135 through the second magnetic attractor 143. The second magnetic attractor 143 attracts the first magnetic attractor 135 to drive the tray 131 to rotate, thereby improving the stability of the tray 131 driving the centrifuge cylinder 11 to rotate. Therefore, the coaxiality accuracy of the rotating shaft of the centrifuge cylinder 11 and the rotating shaft of the motor is high, so as to reduce the vibration noise when the centrifuge cylinder 11 rotates.

[0029] In this embodiment, the centrifuge device 1 attracts the first magnetic attractor 135 through the second magnetic attractor 143 to drive the tray 131 and the centrifuge cylinder 11 to rotate. This reduces the direct connection between the motor shaft and the centrifuge cylinder 11 of the centrifuge device 1, thereby reducing the occurrence of low coaxiality between the rotation shaft of the centrifuge cylinder 11 and the rotation shaft of the motor, and solving the problem of noise caused by rotational friction due to low coaxiality in the prior art.

[0030] The first magnetic attractor 135 and the second magnetic attractor 143 can be permanent magnets or electromagnets. Multiple first magnetic attractors 135 and second magnetic attractors 143 are provided, arranged alternately. The magnetic poles of the first magnetic attractor 135 and the second magnetic attractor 143 correspond one-to-one along the axial direction of the rotating disk 141 and attract each other, causing the second magnetic attractor 143 to attract the first magnetic attractor 135, thereby driving the tray 131 and the centrifuge cylinder 11 to rotate. When the motor is turned on and drives the rotating disk 141 to rotate, the rotational speed of the rotating disk 141 increases rapidly. The rotating disk 141 drives the second magnetic attractor 143 to rotate, and the second magnetic attractor 143 attracts the first magnetic attractor 135, thus steadily increasing the speed of the first magnetic attractor 135 and the tray 131, reducing vibration noise of the tray 131 when the motor starts.

[0031] The centrifuge cylinder 11 is used to rotate to complete the blood separation operation. The cylinder body 113 of the centrifuge cylinder 11 includes a piston 116, an upper cylinder portion 114, and a lower cylinder portion 115. The upper cylinder portion 114 and the lower cylinder portion 115 are detachably connected and are connected to form a centrifuge chamber. The piston 116 is movably disposed in the centrifuge chamber. A first rotating shaft 111 is fixedly connected to the upper cylinder portion 114, and a second rotating shaft 112 is fixedly connected to the lower cylinder portion 115.

[0032] The shell 12 is used to house the centrifuge cylinder 11, which rotates inside the shell 12. The shell 12 includes two semi-cylindrical shell portions 127, which are joined together to form the shell 12.

[0033] Please combine Figures 1 to 2 As shown, Figures 1 to 2 All of these are first embodiments of the centrifuge device 1 of this application. The periphery of the tray 131 is provided with a first groove 134, and the first magnetic member 135 is fixed to the first groove 134. The periphery of the rotating disk 141 is provided with a second groove 142, and the second magnetic member 143 is fixed to the second groove 142. The first groove 134 and the second groove 142 correspond to each other along the axial direction of the rotating disk 141.

[0034] In this embodiment, the opening direction of the first groove 134 is oriented upwards along the axial direction of the rotating disk 141. The thickness of the bottom wall of the first groove 134 is between 1mm and 2mm. This facilitates the fixed placement of the first magnetic member 135 within the first groove 134, and the magnetic field lines of the first magnetic member 135 pass through the bottom wall of the first groove 134, causing the first magnetic member 135 and the second magnetic member 143 to attract each other. The opening direction of the second groove 142 faces the bottom wall of the first groove 134, which further facilitates the attraction between the first magnetic member 135 and the second magnetic member 143. The second magnetic member 143 attracts the first magnetic member 135, causing the speed of the first magnetic member 135 and the tray 131 to increase steadily, thereby reducing the vibration noise of the tray 131 when the motor starts.

[0035] In one possible implementation, the tray 131 and the rotating disk 141 are spaced apart, and the distance between the tray 131 and the rotating disk 141 does not exceed 15mm.

[0036] Please combine Figure 1 As shown, in this embodiment, the second rotating shaft 112 of the centrifuge cylinder 11 is fixedly connected to the tray 131, so that the bottom surface of the tray 131 is suspended. The rotating disk 141 is located below the tray 131, and the distance between the bottom surface of the tray 131 and the top surface of the rotating disk 141 is no more than 15mm. This facilitates the attraction between the first magnetic member 135 and the second magnetic member 143. The second magnetic member 143 attracts the first magnetic member 135, so that the speed of the first magnetic member 135 and the tray 131 is steadily increased, thereby reducing the vibration noise of the tray 131 when the motor starts.

[0037] In one possible implementation, the tray 131 includes a tray portion 132 and a connecting hole portion 133. The connecting hole portion 133 protrudes from the surface of the tray portion 132 along the axial direction of the rotating disk 141. The second rotating shaft 112 extends into the connecting hole portion 133 and is fixedly connected to the connecting hole portion 133. The inner ring of the second bearing 122 is fixedly connected to the circumferential surface of the connecting hole portion 133, and the outer ring of the second bearing 122 is fixedly connected to the housing 123.

[0038] In this embodiment, a first magnetic attractor 135 is disposed on the periphery of the tray portion 132, and a second magnetic attractor 143 attracts the first magnetic attractor 135, causing the tray portion 132 to rotate along the connecting hole portion 133. The tray portion 132 extends horizontally from the circumferential surface of the connecting hole portion 133, thereby improving the stability of the tray 131's rotation. The second rotating shaft 112 extends into the connecting hole portion 133, which facilitates the stable rotation of the tray 131 and the second rotating shaft 112, thereby reducing the vibration noise between the tray 131 and the second rotating shaft 112 of the centrifuge cylinder 11 when the motor starts.

[0039] In one possible implementation, the bottom of the housing 123 is provided with a second annular groove 126, the second bearing 122 is disposed in the second annular groove 126, and the outer ring of the second bearing 122 is fixedly connected to the side wall of the second annular groove 126.

[0040] In this embodiment, the second annular groove 126 is used to improve the positional accuracy of the second bearing 122, reduce the positional deviation of the second rotating shaft 112 of the centrifuge cylinder 11 during rotation, and improve the coaxiality accuracy of the rotating shaft of the centrifuge cylinder 11 and the rotating shaft of the motor, so as to reduce the vibration noise when the centrifuge cylinder 11 rotates.

[0041] In one possible implementation, the top of the housing 123 is provided with a first annular groove 125, which corresponds to a second annular groove 126 along the axial direction of the rotating disk 141. A first bearing 121 is disposed in the first annular groove 125, with the outer ring of the first bearing 121 fixedly connected to the side wall of the first annular groove 125 and the inner ring of the first bearing 121 fixedly connected to the first rotating shaft 111.

[0042] In this embodiment, the first annular groove 125 is used to improve the positional accuracy of the first bearing 121, reduce the positional deviation of the first rotating shaft 111 of the centrifuge cylinder 11 during rotation, and improve the coaxiality accuracy of the rotating shaft of the centrifuge cylinder 11 and the rotating shaft of the motor, so as to reduce the vibration noise when the centrifuge cylinder 11 rotates.

[0043] Please combine Figure 3 As shown, Figure 3 In a second embodiment of the centrifuge device 1 of this application, in one possible implementation, the surface of the rotating disk 141 is recessed to form a receiving cavity, and the tray 131 is rotatably disposed in the receiving cavity, with the circumferential surface of the tray 131 engaging with the inner wall of the receiving cavity.

[0044] In this embodiment, the first magnetic chuck 143 and the second magnetic chuck 143 correspond radially along the rotating disk 141. The first magnetic chuck 143 is fixed to the periphery of the tray 131, and the second magnetic chuck 143 is fixed to the inner wall of the receiving cavity. The second magnetic chuck 143 attracts the first magnetic chuck 135 to drive the tray 131 and the centrifuge cylinder 11 to rotate.

[0045] In one possible implementation, the first magnetic chuck 143 is disposed on the periphery of the tray 131, and the second magnetic chuck 143 is disposed on the inner wall of the receiving cavity.

[0046] In this embodiment, the magnetic poles of the first magnetic attractor 135 and the second magnetic attractor 143 correspond one-to-one along the radial direction of the rotating disk 141 and attract each other, so that the second magnetic attractor 143 attracts the first magnetic attractor 135 to drive the tray 131 and the centrifuge cylinder 11 to rotate. On the one hand, the tray 131 and the rotating disk 141 are connected by magnetic attraction but not contact, thereby reducing rotational noise caused by coaxiality issues; on the other hand, the tray 131 is disposed in the receiving cavity of the rotating disk 141, so that the magnetic forces of the first magnetic attractor 135 and the second magnetic attractor 143 are concentrated, thereby improving the rotational stability of the tray 131 and making the tray 131 rotate smoothly in the receiving cavity of the rotating disk 141.

[0047] In one possible implementation, a fixing part 124 is provided on the side of the housing 123, and the fixing part 124 is used for positioning the housing 123.

[0048] In this embodiment, the position of the housing 123 is fixed, and the centrifuge tube 11 rotates inside the housing 123 to improve the stability of the rotation of the centrifuge tube 11, thereby reducing the vibration noise when the centrifuge tube 11 rotates.

[0049] In summary, the centrifuge device 1 provided in this embodiment improves the positional accuracy of the rotating shaft of the centrifuge cylinder 11 through the first bearing 121 and the second bearing 122. The centrifuge device 1 uses the second magnetic attractor 143 to correspond with the first magnetic attractor 135. The second magnetic attractor 143 attracts the first magnetic attractor 135 to drive the tray 131 to rotate, thereby improving the stability of the tray 131 driving the centrifuge cylinder 11 to rotate. Therefore, the coaxiality accuracy of the rotating shaft of the centrifuge cylinder 11 and the rotating shaft of the motor is high, so as to reduce the vibration noise when the centrifuge cylinder 11 rotates.

[0050] An embodiment of this application provides a centrifuge, including the centrifugation device described above.

[0051] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A centrifuge device, characterized in that, include: A centrifuge cylinder includes a first rotating shaft, a second rotating shaft, and a cylinder body. The first rotating shaft is fixedly connected to the top of the cylinder body, and the second rotating shaft is fixedly connected to the bottom of the cylinder body. A cylindrical shell includes a first bearing, a second bearing, and a housing. The cylindrical body is disposed inside the housing. The first bearing is disposed at the top of the housing. The first rotating shaft is rotatably connected to the housing through the first bearing. The second bearing is disposed at the bottom of the housing. The second rotating shaft is rotatably connected to the housing through the second bearing. A first magnetic connector includes a tray and a first magnetic attractor, wherein the tray is fixedly connected to the second rotating shaft, and the first magnetic attractor surrounds the second rotating shaft and is fixedly connected to the tray; The second magnetic connector includes a rotating disk and a second magnetic attractor. The second magnetic attractor is fixedly connected to the rotating disk and corresponds to the first magnetic attractor. The second magnetic attractor can be rotated under force and attract the first magnetic attractor to drive the tray and centrifuge cylinder to rotate.

2. The centrifuge device according to claim 1, characterized in that: The tray has a first groove around its periphery, and the first magnetic member is fixed to the first groove. The rotating disk has a second groove around its periphery, and the second magnetic member is fixed to the second groove. The first groove and the second groove correspond to each other along the axial direction of the rotating disk.

3. The centrifuge device according to claim 1, characterized in that: The tray and the rotating disk are spaced apart, and the distance between the tray and the rotating disk does not exceed 15mm.

4. The centrifuge device according to claim 1, characterized in that: It also includes a motor, which is connected to the rotating disk and is used to drive the rotating disk to rotate.

5. The centrifuge device according to claim 1, characterized in that: The tray includes a disc portion and a connecting hole portion. The connecting hole portion protrudes from the surface of the disc portion along the axial direction of the rotating disk. The second rotating shaft extends into the connecting hole portion and is fixedly connected to the connecting hole portion. The inner ring of the second bearing is fixedly connected to the circumferential surface of the connecting hole portion, and the outer ring of the second bearing is fixedly connected to the housing.

6. The centrifuge apparatus according to claim 5, characterized in that: The bottom of the housing is provided with a second annular groove, the second bearing is disposed in the second annular groove, and the outer ring of the second bearing is fixedly connected to the side wall of the second annular groove.

7. The centrifuge apparatus according to claim 6, characterized in that: The top of the housing is provided with a first annular groove, which corresponds to the second annular groove along the axial direction of the rotating disk. The first bearing is disposed in the first annular groove, the outer ring of the first bearing is fixedly connected to the side wall of the first annular groove, and the inner ring of the first bearing is fixedly connected to the first rotating shaft.

8. The centrifuge apparatus according to claim 1, characterized in that: The rotating disk has a recessed cavity, and the tray is rotatably disposed in the cavity, with the circumferential surface of the tray engaging with the inner wall of the cavity.

9. The centrifuge apparatus according to claim 8, characterized in that: The first magnetic suction member is disposed on the periphery of the tray, and the second magnetic suction member is disposed on the inner wall of the receiving cavity.

10. A centrifuge, characterized in that, Includes the centrifuge device according to any one of claims 1 to 9.

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