CN210115165U - Centrifuge rotor fixed knot constructs - Google Patents
Centrifuge rotor fixed knot constructs Download PDFInfo
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- CN210115165U CN210115165U CN201921501887.7U CN201921501887U CN210115165U CN 210115165 U CN210115165 U CN 210115165U CN 201921501887 U CN201921501887 U CN 201921501887U CN 210115165 U CN210115165 U CN 210115165U
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Abstract
The utility model discloses a centrifuge rotor fixing structure, which comprises a rotor and a motor, wherein the motor is provided with a rotating shaft, and the rotor is fixedly connected on the rotating shaft; the rotating shaft is of a conical structure; the rotor comprises an upper cover and a bottom cover, and the upper cover and the bottom cover are connected in a matched manner; the bottom of the upper cover is provided with a connecting part in an outward protruding manner, and the bottom surface of the connecting part is provided with a first circular through hole; the rotor insert is nested in the first circular through hole, a circular groove is formed in the top of the rotor insert, a mounting hole is formed in the bottom of the circular groove, the lower end edge of the mounting hole extends downwards to penetrate through the bottom of the rotor insert and gradually increases to form a conical through hole, the rotating shaft is connected with the conical through hole in a matched mode, and a fixing nut is connected to the upper end of the rotating shaft so that the rotating shaft is fixedly connected with the rotor. The utility model discloses simple structure, the assembly of being convenient for, long service life, the practicality is strong.
Description
Technical Field
The utility model relates to an experimental apparatus field, concretely relates to centrifuge rotor fixed knot constructs.
Background
The laboratory centrifuges are generally high-speed freezing series centrifuges or low-speed series centrifuges, and the principle of the laboratory centrifuges is an instrument which separates substances with different densities and different particle sizes in suspension or emulsion by using centrifugal force generated by a rotating head or analyzes the substances while separating the substances.
The existing centrifuge, the cooperation mode of rotor and motor adopts the plane cooperation mode more, processes a plane and increase a through-hole of processing and an installation locating pin on the motor shaft for prevent that the rotor from producing linear circular motion with the relative position of motor shaft at the during operation, drive the rotor when the motor rotates at a high speed, the high-speed rotatory powerful centrifugal force that produces of rotor accelerates the sedimentation rate of different proportion composition (solid phase or liquid phase) in the sample, separate the material of different sedimentation coefficient and buoyancy density in the sample.
The existing centrifuges have the following defects:
first, the existing centrifuge, the rotor and the motor are mostly matched in a plane, a plane is processed on the motor shaft, a through hole is additionally processed on the motor shaft, and a positioning pin is installed to prevent the rotor from generating linear circular motion at the relative position of the rotor and the motor shaft when working, and the rotor is driven when the motor rotates at high speed. The motor drives the rotor to rotate at a high speed to generate strong torque force, the requirement on the strength of the motor shaft is extremely high, and the motor shaft is provided with a through hole, so that the strength of the motor shaft is greatly reduced; reducing the service life and safety of the centrifuge.
Second, the plane and planar cooperation, because processing and assembly error problem cause the unbalance problem of rotor and main shaft easily, this kind of unbalance centrifugal force effect can arouse the vibration on rotor bearing, bearing wear with higher speed to seriously influence the performance and the life-span of product, produce the mechanical wear noise simultaneously, influence customer's use and experience.
Thirdly, because the locating pin of assembly on the motor shaft need with the notch cooperation of rotor, need fix a position the motor locating pin when the assembly then correspond the assembly to the notch of rotor again, cause certain difficulty when using to load and unload the customer.
Therefore, the further improvement of the prior art is needed, and the centrifuge rotor fixing structure which is simple in structure, convenient to assemble and disassemble, high in safety and long in service life is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art not enough, provide a simple structure, loading and unloading convenience, security height and long service life's centrifuge rotor fixed knot constructs.
In order to realize the purpose of the utility model, the utility model discloses a technical scheme realize as follows: a centrifuge rotor fixing structure comprises a centrifuge shell, a rotor and a motor, wherein the motor is fixed on the centrifuge shell, a rotating shaft is arranged on the motor, and the rotor is fixedly connected to the rotating shaft; the rotating shaft is of a conical structure;
the rotor comprises an upper cover and a bottom cover, and the upper cover and the bottom cover are connected in a matched manner; the bottom of the upper cover is provided with a connecting part in an outward protruding manner, the bottom surface of the connecting part is provided with a first circular through hole, and the first circular through hole penetrates through the upper cover along the vertical direction;
a rotor insert is nested in the first circular through hole, a circular groove is formed in the top of the rotor insert, a mounting hole is formed in the bottom of the circular groove in an inward concave mode, the edge of the lower end of the mounting hole extends downwards to penetrate through the bottom of the rotor insert and is gradually enlarged to form a conical through hole, the rotating shaft is connected with the conical through hole in a matched mode, and the circular groove, the mounting hole and the conical through hole are communicated;
the upper end of the rotating shaft is connected with a fixing nut, so that the rotating shaft is fixedly connected with the rotor.
Preferably, a limiting boss is arranged in the first circular through hole, a positioning portion is arranged on the outer side of the rotor insert along the circumferential direction, and the limiting boss is connected with the positioning portion in a matched mode so as to limit the downward movement of the rotor insert.
Preferably, the fixing nut comprises a fixing nut upper part and a fixing nut lower part, and the size of the fixing nut upper part is larger than that of the fixing nut lower part; when the rotating shaft is connected with the rotor, the upper end of the rotating shaft sequentially penetrates through the conical through hole and the mounting hole and stretches into the circular groove, and the lower portion of the fixing nut stretches into the mounting hole and is connected with the upper end of the rotating shaft.
Preferably, the outer diameter of the upper portion of the fixing nut is larger than the inner diameter of the mounting hole, and when the lower portion of the fixing nut is connected to the upper end of the rotating shaft, the upper portion of the fixing nut is connected to the bottom of the circular groove to limit downward movement of the upper end of the nut, so that the rotating shaft is fixedly connected to the rotor insert.
Preferably, a second circular through hole is formed in the bottom cover, the second circular through hole penetrates through the bottom cover along the vertical direction, and the connecting portion penetrates through the second circular through hole, so that the bottom cover is sleeved on the connecting portion.
Preferably, the motor is fixed on the centrifuge housing through a mounting bracket, the mounting bracket is provided with a plurality of fixing portions along the circumferential direction, and the fixing portions include a first fixing portion, a second fixing portion and a third fixing portion.
Preferably, a plurality of placing holes are uniformly formed in the upper surface of the upper cover along the circumferential direction.
Preferably, a plurality of placing grooves corresponding to the placing holes one by one are circumferentially arranged on the side wall of the upper cover; the bottom cover is provided with an annular baffle plate, and the annular baffle plate is provided with a plurality of arc-shaped grooves which are in one-to-one correspondence with the placing grooves.
Preferably, the upper end of the rotor insert is provided with a first annular groove, the lower end of the rotor insert is provided with a second annular groove, the upper end of the first circular through hole is provided with a first limiting protrusion, the lower end of the first circular through hole is provided with a second limiting protrusion, and the first annular groove and the second annular groove are respectively connected with the first limiting protrusion and the second limiting protrusion in a matched manner, so that the rotor insert is fixedly connected with the rotor.
Preferably, the bottom of the upper cover is provided with a supporting portion, the supporting portion is arranged around the connecting portion, and when the upper cover is connected with the bottom cover, the supporting portion and the bottom cover are connected in a screw punching mode to support the upper cover.
Advantageous effects
Compared with the prior art, the utility model discloses the beneficial effect who gains does: the utility model discloses a rotor and motor, the rotor includes upper cover and bottom, the upper bottom surface of connecting portion is equipped with first circular through-hole, nested in the first circular through-hole has the rotor mold insert, the rotor mold insert adopts the metal material, has wear-resisting effect, simultaneously the rotor mold insert with the pivot is connected, has avoided rotor and pivot direct contact, can effectively prevent the rotor by the wearing and tearing in the process of rotating, prolongs the life of rotor, and still can keep accurate centering effect after loading and unloading; the rotor insert is provided with a conical through hole, and the rotating shaft is of a conical structure; the rotating shaft is connected with the conical through hole in a matched mode, the cross sections of the conical through hole and the rotating shaft are conical surfaces, gapless matching can be achieved through conical surface connection, meanwhile, the rotating shaft and the rotor insert are high in coaxiality, the rotating shaft can transmit larger torque, and the centrifugal machine is better in separation effect. And the upper end of the rotating shaft is connected with a fixing nut so that the rotating shaft is fixedly connected with the rotor. The rotating shaft is connected with the fixing nut through threads, so that the up-and-down swing of the rotor in the operation process is reduced, the operation of the rotor is more stable and reliable, and the safety is good. When the motor during operation, the pivot rotates, drives rotor synchronous revolution, and at centrifugal working process, outside air flow forms a holding down force, and the rotor functioning speed is faster, and the holding down force is big more, guarantees rotor and pivot closely assembled all the time. The utility model discloses simple structure, the assembly and the maintenance of being convenient for, the practicality is strong.
Drawings
Fig. 1 is a cross-sectional view of the present invention;
fig. 2 is an exploded view of the present invention;
fig. 3 is an exploded view of the rotor of the present invention;
fig. 4 is a cross-sectional view of a rotor of the present invention;
fig. 5 is a schematic structural view of the fixing nut of the present invention;
fig. 6 is a cross-sectional view of the rotor insert of the present invention;
the technical characteristics corresponding to the marks in the attached drawings are as follows: 1-centrifuge housing, 11-first support leg, 12-second support leg, 13-first connecting column, 14-second connecting column, 15-third connecting column, 2-motor, 21-rotating shaft, 3-rotor, 31-upper cover, 311-connecting part, 3111-first circular through hole, 3112-limiting boss, 3113-first limiting protrusion, 3114-second limiting protrusion, 312-supporting part, 313-placing hole, 314-placing groove, 32-bottom cover, 321-second circular through hole, 322-annular baffle, 3221-arc groove, 4-rotor insert, 41-circular groove, 42-mounting hole, 43-conical through hole, 44-positioning part, 45-first annular groove, 46-second annular groove, 5-mounting bracket, 51-first fixing part, 52-second fixing part, 53-third fixing part, 6-fixing nut, 61-fixing nut upper part and 62-fixing nut lower part.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and more fully described, the present invention will be described in further detail with reference to the following embodiments, and obviously, some embodiments of the present invention are described below in the following embodiments, but the scope of the present invention is not limited to the following specific embodiments.
As shown in fig. 1 and fig. 2, a centrifuge rotor fixing structure includes a centrifuge shell 1, a rotor 3 and a motor 2, wherein the motor 2 is fixed on the centrifuge shell 1, a rotating shaft 21 is arranged on the motor 2, and the rotor 3 is fixedly connected to the rotating shaft 21; the utility model discloses simple structure, the assembly and the maintenance of being convenient for.
The rotor 3 comprises an upper cover 31 and a bottom cover 32 as shown in fig. 3 and 4, wherein the upper cover 31 and the bottom cover 32 are connected in a matching way; the bottom of the upper cover 31 is provided with a connecting portion 311 protruding outwards, and the connecting portion 311 is provided to facilitate connection with the rotating shaft 21.
As shown in fig. 3 and 4, a first circular through hole 3111 is formed at the bottom of the connecting portion 31, and the first circular through hole 3111 penetrates through the upper cover 31 in the vertical direction; the rotor insert 4 is convenient to set up in the setting of first circular through-hole 3111.
As shown in fig. 1 and 4, the rotor upper cover is formed by an in-film injection molding process, and a rotor insert 4 is embedded into the first circular through hole 3111; the rotor insert 4 is made of metal and has a wear-resisting effect, and meanwhile, the rotor insert 4 is connected with the rotating shaft 21, so that the rotor 3 is prevented from being in direct contact with the rotating shaft 21, the rotor 3 can be effectively prevented from being worn in the rotating process, the service life of the rotor 3 is prolonged, and the accurate centering effect can be still kept after the rotor insert is assembled and disassembled.
As shown in fig. 4 and 6, a circular groove 41 is formed in the top of the rotor insert 4, a mounting hole 42 is formed in the bottom of the circular groove 41 in an inward recessed manner, the lower end edge of the mounting hole 42 extends downward to penetrate through the bottom of the rotor insert 4 and gradually increases to form a conical through hole 43, and the circular groove 41, the mounting hole 42 and the conical through hole 43 are communicated;
as shown in fig. 1 and 2, the rotating shaft 21 has a conical structure; the rotating shaft 21 is connected with the conical through hole 43 in a matched mode, the cross sections of the conical through hole 43 and the rotating shaft 21 are conical surfaces, gapless matching can be achieved by the conical surfaces, meanwhile, the rotating shaft 21 and the rotor insert 4 are high in coaxiality, the rotating shaft 21 can transmit larger torque, and the centrifugal machine is better in separation effect.
As shown in fig. 6, a first annular groove 45 is disposed at an upper end of the rotor insert 4, a second annular groove 46 is disposed at a lower end of the rotor insert 4, a first limiting protrusion 3113 is disposed at an upper end of the first circular through hole 3111, a second limiting protrusion 3113 is disposed at a lower end of the first circular through hole 3111, and the first annular groove 45 and the second annular groove 46 are respectively connected with the first limiting protrusion 3113 and the second limiting protrusion 3114 in a matching manner, so that the rotor insert 4 is fixedly connected with the rotor 3, and the rotor insert and the rotor are prevented from loosening and falling off.
As shown in fig. 6, a limiting boss 3112 is disposed in the first circular through hole 3111, a positioning portion 44 is disposed on an outer side of the rotor insert 4 along a circumferential direction, and the limiting boss 3112 is connected to the positioning portion 44 in a fitting manner to limit downward movement of the rotor insert 4.
As shown in fig. 1, a fixing nut 6 is connected to an upper end of the rotating shaft 21, so that the rotating shaft 21 is fixedly connected to the rotor 3. The rotating shaft 21 is in threaded connection with the fixing nut 6, so that the up-and-down swing of the rotor 3 in the operation process is reduced, the operation of the rotor 3 is more stable and reliable, and the safety is good. When the motor 2 works, the rotating shaft 21 rotates to drive the rotor 3 to rotate synchronously, and in the centrifugal working process, external air flows to form a downward pressure, and the faster the running speed of the rotor 3 is, the larger the downward pressure is, and the rotor 3 and the rotating shaft 21 are always tightly assembled.
A plurality of placing holes 313 are uniformly formed in the upper surface of the upper cover 31 along the circumferential direction, and a plurality of placing grooves 314 corresponding to the placing holes 313 one by one are formed in the sidewall of the upper cover 31 along the circumferential direction. The arrangement of the placing hole 313 is convenient for the test tube containing the centrifugate to be placed in the placing groove 314 for centrifugal motion, so as to separate the suspension or the emulsion.
As shown in fig. 4, an annular baffle 322 is disposed on the bottom cover 32, a plurality of arc-shaped grooves 3221 corresponding to the placing groove 314 in a one-to-one manner are disposed on the annular baffle 322, and the arc-shaped grooves 3221 are matched with the placing groove 314 to fix the test tubes for centrifugation, so as to reduce shaking of the test tubes, and enable suspension or emulsion in the test tubes to be better separated after centrifugal motion.
As shown in fig. 1 and 4, a supporting portion 312 is disposed at the bottom of the upper cover 31, the supporting portion 312 is disposed around the connecting portion 311, and when the upper cover 31 is connected to the bottom cover 32, the supporting portion 312 and the bottom cover 32 are connected by screw drilling to support the upper cover 31, so that the upper cover 31 is fixedly connected to the bottom cover 32, and the connecting portion 311 is restricted from moving downward.
As shown in fig. 1 and 5, the fixing nut 6 includes an upper fixing nut portion 61 and a lower fixing nut portion 62, and the size of the upper fixing nut portion 61 is larger than that of the lower fixing nut portion 62; when the rotating shaft 21 is connected with the rotor 3, the upper end of the rotating shaft 21 sequentially penetrates through the conical through hole 43 and the mounting hole 42 and extends into the circular groove 41, and the lower part 62 of the fixing nut extends into the mounting hole and is connected with the upper end of the rotating shaft.
The outer diameter of the upper fixing nut portion 61 is greater than the inner diameter of the mounting hole 42, when the lower fixing nut portion 62 is connected to the upper end of the rotating shaft 21, the upper fixing nut portion 61 is connected to the bottom of the circular groove 41, and the bottom of the circular groove 41 limits the upper fixing nut portion 61 to move downward, so that the rotor 3 is fixedly connected to the rotating shaft 21.
As shown in fig. 3, a second circular through hole 321 is formed in the bottom cover 32, the second circular through hole 321 penetrates through the bottom cover 32 in the vertical direction, and the connecting portion 311 penetrates through the second circular through hole 321, so that the bottom cover 32 is sleeved on the connecting portion 311. The second circular through hole 321 is provided to facilitate the connection between the connection portion 311 and the rotation shaft 21.
As shown in fig. 1 and 2, the motor 2 is fixed on the centrifuge housing 1 by a mounting bracket 5, and the mounting bracket 5 is provided with a plurality of fixing portions along the circumferential direction, and the fixing portions include a first fixing portion 51, a second fixing portion 52 and a third fixing portion 53. The first fixing portion 51, the second fixing portion 52 and the third fixing portion 53 are arranged to fix the motor 2 to the centrifuge housing 1.
As shown in fig. 2, a plurality of connection columns corresponding to the fixing portions are arranged on the centrifuge housing 1, the connection columns include a first connection column 13, a second connection column 14 and a third connection column 15, and the first connection column 13, the second connection column 14 and the third connection column 15 are connected with the first fixing portion 51, the second fixing portion 52 and the third fixing portion 53 in a one-to-one correspondence manner, so that the motor 2 is fixed on the centrifuge housing 1 by the mounting bracket 5.
As shown in fig. 1, a plurality of support legs are arranged around the bottom of the centrifuge housing 1, and the support legs include a first support leg 11, a second support leg 12, a third support leg (not shown in the drawing), and a fourth support leg (not shown in the drawing); the arrangement of the first supporting leg 11, the second supporting leg 12, the third supporting leg and the fourth supporting leg is convenient for supporting the centrifuge housing 1.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the scope of the present application should be determined by the appended claims, and all changes and modifications to the above-described embodiments that can be made by those skilled in the art to which the present invention pertains will be readily apparent to those of ordinary skill in the art to which the present invention pertains. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. The utility model provides a centrifuge rotor fixed knot constructs, includes centrifuge housing, rotor and motor, its characterized in that: the motor is fixed on the shell of the centrifugal machine, a rotating shaft is arranged on the motor, and the rotor is fixedly connected to the rotating shaft; the rotating shaft is of a conical structure;
the rotor comprises an upper cover and a bottom cover, and the upper cover and the bottom cover are connected in a matched manner; the bottom of the upper cover is provided with a connecting part in an outward protruding manner, the bottom surface of the connecting part is provided with a first circular through hole, and the first circular through hole penetrates through the upper cover along the vertical direction;
a rotor insert is nested in the first circular through hole, a circular groove is formed in the top of the rotor insert, a mounting hole is formed in the bottom of the circular groove in an inward concave mode, the edge of the lower end of the mounting hole extends downwards to penetrate through the bottom of the rotor insert and is gradually enlarged to form a conical through hole, the rotating shaft is connected with the conical through hole in a matched mode, and the circular groove, the mounting hole and the conical through hole are communicated;
the upper end of the rotating shaft is connected with a fixing nut, so that the rotating shaft is fixedly connected with the rotor.
2. A centrifuge rotor fixing structure according to claim 1, wherein:
the rotor insert is characterized in that a limiting boss is arranged in the first circular through hole, a positioning portion is arranged on the outer side of the rotor insert along the circumferential direction, and the limiting boss is connected with the positioning portion in a matched mode so as to limit the downward movement of the rotor insert.
3. A centrifuge rotor fixing structure according to claim 1, wherein:
the fixing nut comprises a fixing nut upper part and a fixing nut lower part, and the size of the fixing nut upper part is larger than that of the fixing nut lower part; when the rotating shaft is connected with the rotor, the upper end of the rotating shaft sequentially penetrates through the conical through hole and the mounting hole and stretches into the circular groove, and the lower portion of the fixing nut stretches into the mounting hole and is connected with the upper end of the rotating shaft.
4. A centrifuge rotor fixing structure according to claim 3, wherein:
the outer diameter of the upper part of the fixing nut is larger than the inner diameter of the mounting hole, when the lower part of the fixing nut is connected with the upper end of the rotating shaft, the upper part of the fixing nut is connected with the bottom of the circular groove so as to limit the downward movement of the upper end of the nut, and the rotating shaft is fixedly connected with the rotor insert.
5. A centrifuge rotor fixing structure according to claim 1, wherein:
the bottom cover is provided with a second circular through hole which penetrates through the bottom cover along the vertical direction, and the connecting part penetrates through the second circular through hole, so that the bottom cover is sleeved on the connecting part.
6. A centrifuge rotor fixing structure according to claim 1, wherein:
the motor is fixed on the centrifuge shell through a mounting bracket, the mounting bracket is provided with a plurality of fixing parts along the circumferential direction, and the fixing parts comprise a first fixing part, a second fixing part and a third fixing part.
7. A centrifuge rotor fixing structure according to claim 1, wherein:
the upper surface of upper cover evenly is equipped with a plurality of holes of placing along circumference.
8. A centrifuge rotor fixing structure according to claim 7, wherein:
a plurality of placing grooves which are in one-to-one correspondence with the placing holes are formed in the circumferential direction on the side wall of the upper cover; the bottom cover is provided with an annular baffle plate, and the annular baffle plate is provided with a plurality of arc-shaped grooves which are in one-to-one correspondence with the placing grooves.
9. A centrifuge rotor fixing structure according to claim 8, wherein: the upper end of the rotor insert is provided with a first annular groove, the lower end of the rotor insert is provided with a second annular groove, the upper end of the first circular through hole is provided with a first limiting protrusion, the lower end of the first circular through hole is provided with a second limiting protrusion, and the first annular groove and the second annular groove are respectively matched and connected with the first limiting protrusion and the second limiting protrusion, so that the rotor insert is fixedly connected with the rotor.
10. A centrifuge rotor fixing structure according to claim 1, wherein: the bottom of the upper cover is provided with a supporting part, the supporting part surrounds the connecting part, and when the upper cover is connected with the bottom cover, the supporting part is connected with the bottom cover in a screw punching mode so as to support the upper cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921501887.7U CN210115165U (en) | 2019-09-10 | 2019-09-10 | Centrifuge rotor fixed knot constructs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921501887.7U CN210115165U (en) | 2019-09-10 | 2019-09-10 | Centrifuge rotor fixed knot constructs |
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| Publication Number | Publication Date |
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| CN210115165U true CN210115165U (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921501887.7U Active CN210115165U (en) | 2019-09-10 | 2019-09-10 | Centrifuge rotor fixed knot constructs |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115069428A (en) * | 2022-06-10 | 2022-09-20 | 郑州科达机械仪器设备有限公司 | Centrifugal machine |
-
2019
- 2019-09-10 CN CN201921501887.7U patent/CN210115165U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115069428A (en) * | 2022-06-10 | 2022-09-20 | 郑州科达机械仪器设备有限公司 | Centrifugal machine |
| CN115069428B (en) * | 2022-06-10 | 2023-08-18 | 郑州科达机械仪器设备有限公司 | Centrifugal machine |
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