Centrifugal machine easy to assemble and disassemble

Abstract

A centrifugal machine easy to assemble and disassemble comprises a rotor, a rotor cover and a motor, the rotor is connected to the motor through an assembling and disassembling assembly, and the rotor cover is fixedly connected to the rotor; the assembling and disassembling assembly comprises a connecting seat, a rotor nut, a rotor seat and a wrench, and the connecting seat is fixedly connected to the rotor through a bolt; the rotor nut is arranged between the rotor seat and the connecting seat; the rotor seat is fixedly connected to the bottom of the rotor and sleeves a rotating shaft of the motor; the rotor cover is connected to the rotor through a central screw rod, the bottom of the central screw rod is connected with the connecting seat, the upper part of the central screw rod is provided with an inverted buckling step for buckling the rotor cover, and the rotor cover is provided with a connecting step corresponding to the inverted buckling step. According to the utility model, the central screw rod is rotated, and the connecting block at the bottom of the central screw rod buckles the connecting seat or is separated from the connecting seat, so that the purpose that the rotor cover tightly covers the rotor or the rotor cover is opened on the rotor is achieved.

Description

Technical Field

[0001] The utility model relates to a centrifuge, in particular to a centrifuge with easy assembly and disassembly between a rotor, a rotor cover and a motor. Background Art

[0002] Centrifuge is an essential instrument in the medical, biological, chemical, scientific research, teaching and other industries.

[0003] When the instrument is running, the motor drives the rotor to rotate, thereby generating centrifugal force, and the samples placed in the rotor are separated under the action of centrifugal force.

[0004] Currently, centrifuge products are generally subject to design flaws, particularly in the connection between the centrifuge rotor and motor, and the connection between the rotor cover and rotor. Current centrifuge rotors and motors are typically mechanically connected using bolts. This connection, located inside the rotor, makes installation and removal of the rotor difficult. Furthermore, to reduce rotor weight, the rotor is typically made of aluminum, while the motor shaft is typically made of steel. This connection between the aluminum rotor and the steel shaft can easily cause wear or deformation, leading to slight rotor wobble, eccentricity, or a larger angled surface on the rotor connection, causing the rotor to sink, resulting in loud noise and vibration during operation. Furthermore, the rotor cover is also threaded, making installation and removal a lengthy process. If the connection is not properly secured, the rotor cover may wobble during operation, causing the rotor to wobble and generate significant noise and vibration. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a centrifuge that is easy to assemble and disassemble.

[0006] In order to solve the above technical problems, the technical solution proposed in the present invention is: A centrifuge that is easy to load and unload, comprising a rotor, a rotor cover and a motor, wherein the rotor is linked to the motor through a loading and unloading assembly, and the rotor cover is fixedly connected to the rotor; the loading and unloading assembly comprises a connecting seat, a rotor nut, a rotor seat and a wrench, and the connecting seat is fixedly connected to the rotor by bolts; the rotor nut is arranged between the rotor seat and the connecting seat, and the rotor seat is fixedly connected to the bottom of the rotor and is sleeved on the rotating shaft of the motor; the wrench comprises a handle and a rotating rod, the handle is connected to the rotating rod, and the rotating rod passes through the connecting seat and is connected to the center hole of the rotor nut, and the shape of the cross section of the rotating rod matches the shape of the center hole of the rotor nut; the rotor nut is connected to the upper part of the rotating shaft by a thread.

[0007] The above-mentioned centrifuge that is easy to load and unload is preferably configured such that the rotor cover is connected to the rotor via a central screw, the bottom of the central screw is connected to the connecting seat, the upper portion of the central screw is provided with an undercut step for buckling the rotor cover, and the rotor cover is provided with a connecting step corresponding to the undercut step.

[0008] In the above-mentioned centrifuge that is easy to assemble and disassemble, preferably, a retaining ring is provided on the central screw below the undercut step.

[0009] In the above-mentioned centrifuge which is easy to assemble and disassemble, preferably, a connecting block is provided at the bottom of the central screw, and a connecting buckle for overlapping with the connecting block is provided on the connecting seat.

[0010] The above-mentioned centrifuge that is easy to assemble and disassemble is preferably provided with a tightening assembly of the connecting block on the connecting seat; the tightening assembly includes a spring and a steel ball, and a spring accommodating hole is provided on the connecting seat, and the accommodating hole is provided at the junction of the seat body of the connecting seat and the lap buckle; the diameter of the top of the accommodating hole is smaller than the diameter of the steel ball, the spring and the steel ball are arranged in the accommodating hole, and the spring presses the steel ball upward so that the steel ball leaks out of the top of the accommodating hole; the part of the steel ball that leaks out of the accommodating hole presses the connecting block.

[0011] In the above-mentioned centrifuge that is easy to assemble and disassemble, preferably, the bottom of the spring in the receiving hole is against the rotor.

[0012] In the above-mentioned centrifuge which is easy to assemble and disassemble, preferably, the rotating shaft is provided with a rotating shaft inclined surface connected to the rotor seat, and the rotor seat is provided with a connecting inclined surface matching the rotating shaft inclined surface.

[0013] Compared with the existing technology, the advantage of the present invention is that: in the present invention, when the center screw is rotated, the connecting block at the bottom of the center screw will buckle the connecting seat or separate from the connecting seat, thereby achieving the purpose of tightly covering the rotor cover on the rotor or opening the rotor cover on the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of the easily assembled and unassembled centrifuge in Example 1.

[0015] Figure 2 This is a schematic cross-sectional view of the easily assembled and disassembled centrifuge in Example 1.

[0016] Figure 3 This is a schematic structural diagram of the tightening assembly in Example 1.

[0017] Figure 4 Schematic diagram of the structure of the central screw in Example 1.

[0018] Figure 5 This is a structural diagram of the connecting seat in Example 1.

[0019] Figure 6 This is a schematic cross-sectional structural diagram of the connecting seat in Example 1.

[0020] Legend

[0021] 1. Rotor; 2. Rotor cover; 3. Motor; 31. Rotating shaft; 311. Rotating shaft inclined surface; 4. Loading and unloading assembly; 41. Connecting seat; 411. Overlap buckle; 42. Rotor nut; 43. Rotor seat; 431. Connecting inclined surface; 44. Receiving hole; 45. Center screw; 451. Undercut step; 452. Connecting block; 46. Retaining ring; 5. Tightening assembly; 51. Spring; 52. Steel ball; 6. Wrench; 61. Handle; 62. Rotating rod. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described in more comprehensive and detailed manner below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0023] It should be noted that when an element is described as being "fixed, fixed, connected or communicated with" another element, it can be directly fixed, fixed, connected or communicated with the other element, or it can be indirectly fixed, fixed, connected or communicated with the other element through other intermediate connectors.

[0024] Unless otherwise defined, all technical terms used hereinafter have the same meanings as those generally understood by those skilled in the art. The technical terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention. Example 1

[0025] like Figure 1 、 Figure 2 and Figure 3 The illustrated embodiment of an easily assembled and disassembled centrifuge includes a rotor 1, a rotor cover 2, and a motor 3. The rotor 1 is connected to the motor 3 via an assembly and disassembly assembly 4, and the rotor cover 2 is fixedly connected to the rotor 1. The assembly and disassembly assembly 4 includes a connecting base 41, a rotor nut 42, a rotor base 43, and a wrench 8. The connecting base 41 is fixedly connected to the rotor 1 by bolts. The rotor nut 42 is disposed between the rotor base 43 and the connecting base 41. The rotor base 43 is fixedly connected to the bottom of the rotor 1 and sleeved on the rotating shaft 31 of the motor 3. The wrench 8 includes a handle 81 and a rotating rod 82. The handle 81 is connected to the rotating rod 82, which passes through the connecting base 41 and is connected to the center hole of the rotor nut 42. The cross-sectional shape of the rotating rod 82 matches the shape of the center hole of the rotor nut 42. The rotor nut 42 is threadedly connected to the upper portion of the rotating shaft 31. Specifically, in this embodiment, the cross-sectional shape of the rotating rod 82 is hexagonal, and the center hole of the rotor nut 42 is a hexagonal through hole that matches the rotating rod.

[0026] In this embodiment, the rotating shaft 31 is provided with a rotating shaft inclined surface 311 connected to the rotor seat 43, and the rotor seat 43 is provided with a connecting inclined surface 431 that matches the rotating shaft inclined surface 311. In this embodiment, to reduce the weight of the rotor 1, the rotor 1 is made of aluminum alloy, and the rotor seat 43 and the rotating shaft 31 are both made of steel. Because the rotor seat 43 is fixedly connected to the rotor 1, there is no wear between the rotor seat 43 and the rotor 1. Since the rotor seat 43 and the rotating shaft 31 are both made of steel, the wear generated by the connection between the rotor seat 43 and the rotating shaft 31 is reduced, ensuring that there is no gap between the rotor seat 43 and the rotating shaft 31. Therefore, the rotor 1 will not tilt after being connected to the rotating shaft 31, thereby reducing shaking and noise.

[0027] In this embodiment, the connecting base 41 , the rotor nut 42 and the rotor base 43 are all provided with a center hole, and after the connecting base 41 , the rotor nut 42 and the rotor base 43 are connected to the rotor 1 , the center holes of the three are coaxially arranged.

[0028] In this embodiment, when the rotor 1 needs to be connected to the rotating shaft 31 of the motor 3, the center hole of the loading and unloading assembly 4 fixedly connected to the rotor 1 is sleeved on the rotating shaft 31 of the motor 3. At this time, the connecting bevel 431 on the rotor seat 43 contacts the rotating shaft bevel 311 on the rotating shaft 31; then the rotating rod 82 of the wrench 8 is inserted into the center hole of the connecting seat 41 and the rotor nut 42. As the handle 81 rotates, the lower end of the rotating rod 82 drives the rotor nut 42 to rotate; since the rotor nut and the rotating shaft of the motor are connected by threads, when the patent nut rotates, it will squeeze the connecting seat downward so that the connecting bevel and the transfer bevel of the connecting seat are tightly fitted together or the connecting bevel and the transfer bevel are loosened.

[0029] In the present invention, the rotor nut 42 can be turned downward to tighten the rotor seat 43 on the shaft 31, or the rotor seat 43 can be loosened on the shaft 31, thereby achieving the purpose of easy installation and removal of the rotor 1 on the shaft 31 of the motor 3.

[0030] In this embodiment, when the rotor 1 needs to be removed from the rotating shaft 31 of the motor 3, it is only necessary to rotate the handle 81 so that the rotor nut 42 and the connecting seat 41 are disengaged upward from the rotating shaft 31 of the motor 3; it is very convenient and quick.

[0031] In this embodiment, if Figure 2 and Figure 3As shown, the rotor cover 2 is connected to the rotor 1 via a central screw 45. An undercut step 452 at the bottom of the central screw 45 is connected to the connecting seat 41. The upper portion of the central screw 45 is provided with an undercut step 451 that engages the rotor cover 2. The rotor cover 2 is provided with a connecting step corresponding to the undercut step 451. A retaining ring 46 is provided on the central screw 45 below the undercut step 451.

[0032] In this embodiment, when the rotor cover 2 is connected to the rotor 1, the undercut step 452 at the bottom of the center screw 45 is connected to the connecting seat 41, and the undercut step 451 at the top of the center screw 45 engages the connecting step of the rotor cover 2. When the rotor cover 2 needs to be opened, the undercut step 452 at the bottom of the center screw 45 is rotated and removed from the connecting seat 41. Under the action of the retaining ring 46 on the center screw 45, the rotor cover 2 is opened from the rotor 1.

[0033] In this embodiment, if Figure 4 、 Figure 5 and Figure 6 As shown, the bottom of the central screw 45 is provided with an undercut step 452, and the connecting seat 41 is provided with a clasp 411 that overlaps the undercut step 452. The connecting seat 41 is provided with a tightening assembly 7 with the undercut step 452; the tightening assembly 7 includes a spring 71 and a steel ball 72. The connecting seat 41 is provided with a receiving hole 44 for the spring 71, and the receiving hole 44 is provided at the junction of the base of the connecting seat 41 and the clasp 411; the diameter of the top of the receiving hole 44 is smaller than the diameter of the steel ball 72, and the spring 71 and the steel ball 72 are arranged in the receiving hole 44. The spring 71 presses the steel ball 72 upward so that the steel ball 72 leaks out of the receiving hole 44; the portion of the steel ball 72 that leaks out of the receiving hole 44 presses against the undercut step 452. In this embodiment, after the connecting seat 41 is fixedly connected to the rotor 1, a limiting hole for the spring 71 is provided at a position on the rotor 1 corresponding to the receiving hole 44, and the lower portion of the spring 71 is arranged in the limiting hole.

[0034] In this embodiment, the center screw 45 and the undercut step 452 are connected through the undercut step 452 on the center screw 45 and the overlap buckle 411 on the connecting seat 41. However, there is a gap after the undercut step 452 is overlapped with the overlap buckle 411, and looseness may occur during rotation. In this embodiment, the undercut step 452 is tightened in the overlap buckle 411 by the spring 71 and the steel ball 72 to prevent loosening.

[0035] In the present invention, when the central screw is rotated, the connecting block at the bottom of the central screw will buckle the connecting seat or separate from the connecting seat, thereby achieving the purpose of tightly covering the rotor cover on the rotor or opening the rotor cover on the rotor.

Claims

1. A centrifuge that is easy to load and unload, characterized in that: It includes a rotor, a rotor cover and a motor, the rotor is linked to the motor through a loading and unloading assembly, and the rotor cover is fixedly connected to the rotor; the loading and unloading assembly includes a connecting seat, a rotor nut, a rotor seat and a wrench, and the connecting seat is fixedly connected to the rotor through bolts; the rotor nut is arranged between the rotor seat and the connecting seat, the rotor seat is fixedly connected to the bottom of the rotor and sleeved on the rotating shaft of the motor: the rotor cover is connected to the rotor through a central screw, the bottom of the central screw is connected to the connecting seat, the upper part of the central screw is provided with an undercut step for buckling the rotor cover, and the rotor cover is provided with a connecting step corresponding to the undercut step.

2. The easily assemble and disassemble centrifuge according to claim 1, characterized in that: A retaining ring is provided on the central screw below the undercut step.

3. The easily assemble and disassemble centrifuge according to claim 1, characterized in that: A connecting block is provided at the bottom of the central screw rod, and a connecting buckle for overlapping the connecting block is provided on the connecting seat.

4. The easily assemble and disassemble centrifuge according to claim 1, characterized in that: The wrench includes a handle and a rotating rod, the handle is connected to the rotating rod, the rotating rod passes through the connecting seat and is connected to the center hole of the rotor nut, and the shape of the rotating rod cross section matches the shape of the center hole of the rotor nut; the rotor nut is connected to the upper part of the rotating shaft through a thread.

5. The easily assemble and disassemble centrifuge according to claim 4, characterized in that: The connecting seat is provided with a tightening assembly of the connecting block; the tightening assembly includes a spring and a steel ball, and the connecting seat is provided with a spring accommodating hole, and the accommodating hole is arranged at the junction of the seat body of the connecting seat and the lap buckle; the diameter of the top of the accommodating hole is smaller than the diameter of the steel ball, the spring and the steel ball are arranged in the accommodating hole, and the spring presses the steel ball upward so that the steel ball leaks out of the top of the accommodating hole; the part of the steel ball that leaks out of the accommodating hole presses the connecting block.

6. The easily assemble and disassemble centrifuge according to claim 5, characterized in that: The bottom of the spring in the accommodating hole presses against the rotor.

7. The easily assemble and disassemble centrifuge according to claim 1, characterized in that: The rotating shaft is provided with a rotating shaft inclined surface connected to the rotor seat, and the rotor seat is provided with a connecting inclined surface matching the rotating shaft inclined surface.

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